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gecko/netwerk/test/httpserver/httpd.js

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/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et: */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the httpd.js server.
*
* The Initial Developer of the Original Code is
* Mozilla Corporation.
* Portions created by the Initial Developer are Copyright (C) 2006
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Darin Fisher (v1, netwerk/test/TestServ.js)
* Christian Biesinger (v2, netwerk/test/unit/head_http_server.js)
* Jeff Walden <jwalden+code@mit.edu> (v3, netwerk/test/httpserver/httpd.js)
* Robert Sayre <sayrer@gmail.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/*
* An implementation of an HTTP server both as a loadable script and as an XPCOM
* component. See the accompanying README file for user documentation on
* httpd.js.
*/
const Cc = Components.classes;
const Ci = Components.interfaces;
const Cr = Components.results;
const Cu = Components.utils;
const CC = Components.Constructor;
const PR_UINT32_MAX = Math.pow(2, 32) - 1;
/** True if debugging output is enabled, false otherwise. */
var DEBUG = false; // non-const *only* so tweakable in server tests
/** True if debugging output should be timestamped. */
var DEBUG_TIMESTAMP = false; // non-const so tweakable in server tests
var gGlobalObject = this;
/**
* Asserts that the given condition holds. If it doesn't, the given message is
* dumped, a stack trace is printed, and an exception is thrown to attempt to
* stop execution (which unfortunately must rely upon the exception not being
* accidentally swallowed by the code that uses it).
*/
function NS_ASSERT(cond, msg)
{
if (DEBUG && !cond)
{
dumpn("###!!!");
dumpn("###!!! ASSERTION" + (msg ? ": " + msg : "!"));
dumpn("###!!! Stack follows:");
var stack = new Error().stack.split(/\n/);
dumpn(stack.map(function(val) { return "###!!! " + val; }).join("\n"));
throw Cr.NS_ERROR_ABORT;
}
}
/** Constructs an HTTP error object. */
function HttpError(code, description)
{
this.code = code;
this.description = description;
}
HttpError.prototype =
{
toString: function()
{
return this.code + " " + this.description;
}
};
/**
* Errors thrown to trigger specific HTTP server responses.
*/
const HTTP_400 = new HttpError(400, "Bad Request");
const HTTP_401 = new HttpError(401, "Unauthorized");
const HTTP_402 = new HttpError(402, "Payment Required");
const HTTP_403 = new HttpError(403, "Forbidden");
const HTTP_404 = new HttpError(404, "Not Found");
const HTTP_405 = new HttpError(405, "Method Not Allowed");
const HTTP_406 = new HttpError(406, "Not Acceptable");
const HTTP_407 = new HttpError(407, "Proxy Authentication Required");
const HTTP_408 = new HttpError(408, "Request Timeout");
const HTTP_409 = new HttpError(409, "Conflict");
const HTTP_410 = new HttpError(410, "Gone");
const HTTP_411 = new HttpError(411, "Length Required");
const HTTP_412 = new HttpError(412, "Precondition Failed");
const HTTP_413 = new HttpError(413, "Request Entity Too Large");
const HTTP_414 = new HttpError(414, "Request-URI Too Long");
const HTTP_415 = new HttpError(415, "Unsupported Media Type");
const HTTP_417 = new HttpError(417, "Expectation Failed");
const HTTP_500 = new HttpError(500, "Internal Server Error");
const HTTP_501 = new HttpError(501, "Not Implemented");
const HTTP_502 = new HttpError(502, "Bad Gateway");
const HTTP_503 = new HttpError(503, "Service Unavailable");
const HTTP_504 = new HttpError(504, "Gateway Timeout");
const HTTP_505 = new HttpError(505, "HTTP Version Not Supported");
/** Creates a hash with fields corresponding to the values in arr. */
function array2obj(arr)
{
var obj = {};
for (var i = 0; i < arr.length; i++)
obj[arr[i]] = arr[i];
return obj;
}
/** Returns an array of the integers x through y, inclusive. */
function range(x, y)
{
var arr = [];
for (var i = x; i <= y; i++)
arr.push(i);
return arr;
}
/** An object (hash) whose fields are the numbers of all HTTP error codes. */
const HTTP_ERROR_CODES = array2obj(range(400, 417).concat(range(500, 505)));
/**
* The character used to distinguish hidden files from non-hidden files, a la
* the leading dot in Apache. Since that mechanism also hides files from
* easy display in LXR, ls output, etc. however, we choose instead to use a
* suffix character. If a requested file ends with it, we append another
* when getting the file on the server. If it doesn't, we just look up that
* file. Therefore, any file whose name ends with exactly one of the character
* is "hidden" and available for use by the server.
*/
const HIDDEN_CHAR = "^";
/**
* The file name suffix indicating the file containing overridden headers for
* a requested file.
*/
const HEADERS_SUFFIX = HIDDEN_CHAR + "headers" + HIDDEN_CHAR;
/** Type used to denote SJS scripts for CGI-like functionality. */
const SJS_TYPE = "sjs";
/** Base for relative timestamps produced by dumpn(). */
var firstStamp = 0;
/** dump(str) with a trailing "\n" -- only outputs if DEBUG. */
function dumpn(str)
{
if (DEBUG)
{
var prefix = "HTTPD-INFO | ";
if (DEBUG_TIMESTAMP)
{
if (firstStamp === 0)
firstStamp = Date.now();
var elapsed = Date.now() - firstStamp; // milliseconds
var min = Math.floor(elapsed / 60000);
var sec = (elapsed % 60000) / 1000;
if (sec < 10)
prefix += min + ":0" + sec.toFixed(3) + " | ";
else
prefix += min + ":" + sec.toFixed(3) + " | ";
}
dump(prefix + str + "\n");
}
}
/** Dumps the current JS stack if DEBUG. */
function dumpStack()
{
// peel off the frames for dumpStack() and Error()
var stack = new Error().stack.split(/\n/).slice(2);
stack.forEach(dumpn);
}
/** The XPCOM thread manager. */
var gThreadManager = null;
/** The XPCOM prefs service. */
var gRootPrefBranch = null;
function getRootPrefBranch()
{
if (!gRootPrefBranch)
{
gRootPrefBranch = Cc["@mozilla.org/preferences-service;1"]
.getService(Ci.nsIPrefBranch);
}
return gRootPrefBranch;
}
/**
* JavaScript constructors for commonly-used classes; precreating these is a
* speedup over doing the same from base principles. See the docs at
* http://developer.mozilla.org/en/docs/Components.Constructor for details.
*/
const ServerSocket = CC("@mozilla.org/network/server-socket;1",
"nsIServerSocket",
"init");
const BinaryInputStream = CC("@mozilla.org/binaryinputstream;1",
"nsIBinaryInputStream",
"setInputStream");
const BinaryOutputStream = CC("@mozilla.org/binaryoutputstream;1",
"nsIBinaryOutputStream",
"setOutputStream");
const ScriptableInputStream = CC("@mozilla.org/scriptableinputstream;1",
"nsIScriptableInputStream",
"init");
const Pipe = CC("@mozilla.org/pipe;1",
"nsIPipe",
"init");
const FileInputStream = CC("@mozilla.org/network/file-input-stream;1",
"nsIFileInputStream",
"init");
const ConverterInputStream = CC("@mozilla.org/intl/converter-input-stream;1",
"nsIConverterInputStream",
"init");
const WritablePropertyBag = CC("@mozilla.org/hash-property-bag;1",
"nsIWritablePropertyBag2");
const SupportsString = CC("@mozilla.org/supports-string;1",
"nsISupportsString");
/**
* Returns the RFC 822/1123 representation of a date.
*
* @param date : Number
* the date, in milliseconds from midnight (00:00:00), January 1, 1970 GMT
* @returns string
* the representation of the given date
*/
function toDateString(date)
{
//
// rfc1123-date = wkday "," SP date1 SP time SP "GMT"
// date1 = 2DIGIT SP month SP 4DIGIT
// ; day month year (e.g., 02 Jun 1982)
// time = 2DIGIT ":" 2DIGIT ":" 2DIGIT
// ; 00:00:00 - 23:59:59
// wkday = "Mon" | "Tue" | "Wed"
// | "Thu" | "Fri" | "Sat" | "Sun"
// month = "Jan" | "Feb" | "Mar" | "Apr"
// | "May" | "Jun" | "Jul" | "Aug"
// | "Sep" | "Oct" | "Nov" | "Dec"
//
const wkdayStrings = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"];
const monthStrings = ["Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"];
/**
* Processes a date and returns the encoded UTC time as a string according to
* the format specified in RFC 2616.
*
* @param date : Date
* the date to process
* @returns string
* a string of the form "HH:MM:SS", ranging from "00:00:00" to "23:59:59"
*/
function toTime(date)
{
var hrs = date.getUTCHours();
var rv = (hrs < 10) ? "0" + hrs : hrs;
var mins = date.getUTCMinutes();
rv += ":";
rv += (mins < 10) ? "0" + mins : mins;
var secs = date.getUTCSeconds();
rv += ":";
rv += (secs < 10) ? "0" + secs : secs;
return rv;
}
/**
* Processes a date and returns the encoded UTC date as a string according to
* the date1 format specified in RFC 2616.
*
* @param date : Date
* the date to process
* @returns string
* a string of the form "HH:MM:SS", ranging from "00:00:00" to "23:59:59"
*/
function toDate1(date)
{
var day = date.getUTCDate();
var month = date.getUTCMonth();
var year = date.getUTCFullYear();
var rv = (day < 10) ? "0" + day : day;
rv += " " + monthStrings[month];
rv += " " + year;
return rv;
}
date = new Date(date);
const fmtString = "%wkday%, %date1% %time% GMT";
var rv = fmtString.replace("%wkday%", wkdayStrings[date.getUTCDay()]);
rv = rv.replace("%time%", toTime(date));
return rv.replace("%date1%", toDate1(date));
}
/**
* Prints out a human-readable representation of the object o and its fields,
* omitting those whose names begin with "_" if showMembers != true (to ignore
* "private" properties exposed via getters/setters).
*/
function printObj(o, showMembers)
{
var s = "******************************\n";
s += "o = {\n";
for (var i in o)
{
if (typeof(i) != "string" ||
(showMembers || (i.length > 0 && i[0] != "_")))
s+= " " + i + ": " + o[i] + ",\n";
}
s += " };\n";
s += "******************************";
dumpn(s);
}
/**
* Instantiates a new HTTP server.
*/
function nsHttpServer()
{
if (!gThreadManager)
gThreadManager = Cc["@mozilla.org/thread-manager;1"].getService();
/** The port on which this server listens. */
this._port = undefined;
/** The socket associated with this. */
this._socket = null;
/** The handler used to process requests to this server. */
this._handler = new ServerHandler(this);
/** Naming information for this server. */
this._identity = new ServerIdentity();
/**
* Indicates when the server is to be shut down at the end of the request.
*/
this._doQuit = false;
/**
* True if the socket in this is closed (and closure notifications have been
* sent and processed if the socket was ever opened), false otherwise.
*/
this._socketClosed = true;
/**
* Used for tracking existing connections and ensuring that all connections
* are properly cleaned up before server shutdown; increases by 1 for every
* new incoming connection.
*/
this._connectionGen = 0;
/**
* Hash of all open connections, indexed by connection number at time of
* creation.
*/
this._connections = {};
}
nsHttpServer.prototype =
{
// NSISERVERSOCKETLISTENER
/**
* Processes an incoming request coming in on the given socket and contained
* in the given transport.
*
* @param socket : nsIServerSocket
* the socket through which the request was served
* @param trans : nsISocketTransport
* the transport for the request/response
* @see nsIServerSocketListener.onSocketAccepted
*/
onSocketAccepted: function(socket, trans)
{
dumpn("*** onSocketAccepted(socket=" + socket + ", trans=" + trans + ")");
dumpn(">>> new connection on " + trans.host + ":" + trans.port);
const SEGMENT_SIZE = 8192;
const SEGMENT_COUNT = 1024;
try
{
var input = trans.openInputStream(0, SEGMENT_SIZE, SEGMENT_COUNT)
.QueryInterface(Ci.nsIAsyncInputStream);
var output = trans.openOutputStream(Ci.nsITransport.OPEN_BLOCKING, 0, 0);
}
catch (e)
{
dumpn("*** error opening transport streams: " + e);
trans.close(Cr.NS_BINDING_ABORTED);
return;
}
var connectionNumber = ++this._connectionGen;
try
{
var conn = new Connection(input, output, this, socket.port, trans.port,
connectionNumber);
var reader = new RequestReader(conn);
// XXX add request timeout functionality here!
// Note: must use main thread here, or we might get a GC that will cause
// threadsafety assertions. We really need to fix XPConnect so that
// you can actually do things in multi-threaded JS. :-(
input.asyncWait(reader, 0, 0, gThreadManager.mainThread);
}
catch (e)
{
// Assume this connection can't be salvaged and bail on it completely;
// don't attempt to close it so that we can assert that any connection
// being closed is in this._connections.
dumpn("*** error in initial request-processing stages: " + e);
trans.close(Cr.NS_BINDING_ABORTED);
return;
}
this._connections[connectionNumber] = conn;
dumpn("*** starting connection " + connectionNumber);
},
/**
* Called when the socket associated with this is closed.
*
* @param socket : nsIServerSocket
* the socket being closed
* @param status : nsresult
* the reason the socket stopped listening (NS_BINDING_ABORTED if the server
* was stopped using nsIHttpServer.stop)
* @see nsIServerSocketListener.onStopListening
*/
onStopListening: function(socket, status)
{
dumpn(">>> shutting down server on port " + socket.port);
this._socketClosed = true;
if (!this._hasOpenConnections())
{
dumpn("*** no open connections, notifying async from onStopListening");
// Notify asynchronously so that any pending teardown in stop() has a
// chance to run first.
var self = this;
var stopEvent =
{
run: function()
{
dumpn("*** _notifyStopped async callback");
self._notifyStopped();
}
};
gThreadManager.currentThread
.dispatch(stopEvent, Ci.nsIThread.DISPATCH_NORMAL);
}
},
// NSIHTTPSERVER
//
// see nsIHttpServer.start
//
start: function(port)
{
if (this._socket)
throw Cr.NS_ERROR_ALREADY_INITIALIZED;
this._port = port;
this._doQuit = this._socketClosed = false;
// The listen queue needs to be long enough to handle
// network.http.max-connections-per-server concurrent connections,
// plus a safety margin in case some other process is talking to
// the server as well.
var prefs = getRootPrefBranch();
var maxConnections =
prefs.getIntPref("network.http.max-connections-per-server") + 5;
try
{
var socket = new ServerSocket(this._port,
true, // loopback only
maxConnections);
dumpn(">>> listening on port " + socket.port + ", " + maxConnections +
" pending connections");
socket.asyncListen(this);
this._identity._initialize(port, true);
this._socket = socket;
}
catch (e)
{
dumpn("!!! could not start server on port " + port + ": " + e);
throw Cr.NS_ERROR_NOT_AVAILABLE;
}
},
//
// see nsIHttpServer.stop
//
stop: function(callback)
{
if (!callback)
throw Cr.NS_ERROR_NULL_POINTER;
if (!this._socket)
throw Cr.NS_ERROR_UNEXPECTED;
this._stopCallback = typeof callback === "function"
? callback
: function() { callback.onStopped(); };
dumpn(">>> stopping listening on port " + this._socket.port);
this._socket.close();
this._socket = null;
// We can't have this identity any more, and the port on which we're running
// this server now could be meaningless the next time around.
this._identity._teardown();
this._doQuit = false;
// socket-close notification and pending request completion happen async
},
//
// see nsIHttpServer.registerFile
//
registerFile: function(path, file)
{
if (file && (!file.exists() || file.isDirectory()))
throw Cr.NS_ERROR_INVALID_ARG;
this._handler.registerFile(path, file);
},
//
// see nsIHttpServer.registerDirectory
//
registerDirectory: function(path, directory)
{
// XXX true path validation!
if (path.charAt(0) != "/" ||
path.charAt(path.length - 1) != "/" ||
(directory &&
(!directory.exists() || !directory.isDirectory())))
throw Cr.NS_ERROR_INVALID_ARG;
// XXX determine behavior of non-existent /foo/bar when a /foo/bar/ mapping
// exists!
this._handler.registerDirectory(path, directory);
},
//
// see nsIHttpServer.registerPathHandler
//
registerPathHandler: function(path, handler)
{
this._handler.registerPathHandler(path, handler);
},
//
// see nsIHttpServer.registerErrorHandler
//
registerErrorHandler: function(code, handler)
{
this._handler.registerErrorHandler(code, handler);
},
//
// see nsIHttpServer.setIndexHandler
//
setIndexHandler: function(handler)
{
this._handler.setIndexHandler(handler);
},
//
// see nsIHttpServer.registerContentType
//
registerContentType: function(ext, type)
{
this._handler.registerContentType(ext, type);
},
//
// see nsIHttpServer.serverIdentity
//
get identity()
{
return this._identity;
},
//
// see nsIHttpServer.getState
//
getState: function(path, k)
{
return this._handler._getState(path, k);
},
//
// see nsIHttpServer.setState
//
setState: function(path, k, v)
{
return this._handler._setState(path, k, v);
},
//
// see nsIHttpServer.getSharedState
//
getSharedState: function(k)
{
return this._handler._getSharedState(k);
},
//
// see nsIHttpServer.setSharedState
//
setSharedState: function(k, v)
{
return this._handler._setSharedState(k, v);
},
//
// see nsIHttpServer.getObjectState
//
getObjectState: function(k)
{
return this._handler._getObjectState(k);
},
//
// see nsIHttpServer.setObjectState
//
setObjectState: function(k, v)
{
return this._handler._setObjectState(k, v);
},
// NSISUPPORTS
//
// see nsISupports.QueryInterface
//
QueryInterface: function(iid)
{
if (iid.equals(Ci.nsIHttpServer) ||
iid.equals(Ci.nsIServerSocketListener) ||
iid.equals(Ci.nsISupports))
return this;
throw Cr.NS_ERROR_NO_INTERFACE;
},
// NON-XPCOM PUBLIC API
/**
* Returns true iff this server is not running (and is not in the process of
* serving any requests still to be processed when the server was last
* stopped after being run).
*/
isStopped: function()
{
return this._socketClosed && !this._hasOpenConnections();
},
// PRIVATE IMPLEMENTATION
/** True if this server has any open connections to it, false otherwise. */
_hasOpenConnections: function()
{
//
// If we have any open connections, they're tracked as numeric properties on
// |this._connections|. The non-standard __count__ property could be used
// to check whether there are any properties, but standard-wise, even
// looking forward to ES5, there's no less ugly yet still O(1) way to do
// this.
//
for (var n in this._connections)
return true;
return false;
},
/** Calls the server-stopped callback provided when stop() was called. */
_notifyStopped: function()
{
NS_ASSERT(this._stopCallback !== null, "double-notifying?");
NS_ASSERT(!this._hasOpenConnections(), "should be done serving by now");
//
// NB: We have to grab this now, null out the member, *then* call the
// callback here, or otherwise the callback could (indirectly) futz with
// this._stopCallback by starting and immediately stopping this, at
// which point we'd be nulling out a field we no longer have a right to
// modify.
//
var callback = this._stopCallback;
this._stopCallback = null;
try
{
callback();
}
catch (e)
{
// not throwing because this is specified as being usually (but not
// always) asynchronous
dump("!!! error running onStopped callback: " + e + "\n");
}
},
/**
* Notifies this server that the given connection has been closed.
*
* @param connection : Connection
* the connection that was closed
*/
_connectionClosed: function(connection)
{
NS_ASSERT(connection.number in this._connections,
"closing a connection " + this + " that we never added to the " +
"set of open connections?");
NS_ASSERT(this._connections[connection.number] === connection,
"connection number mismatch? " +
this._connections[connection.number]);
delete this._connections[connection.number];
// Fire a pending server-stopped notification if it's our responsibility.
if (!this._hasOpenConnections() && this._socketClosed)
this._notifyStopped();
},
/**
* Requests that the server be shut down when possible.
*/
_requestQuit: function()
{
dumpn(">>> requesting a quit");
dumpStack();
this._doQuit = true;
}
};
//
// RFC 2396 section 3.2.2:
//
// host = hostname | IPv4address
// hostname = *( domainlabel "." ) toplabel [ "." ]
// domainlabel = alphanum | alphanum *( alphanum | "-" ) alphanum
// toplabel = alpha | alpha *( alphanum | "-" ) alphanum
// IPv4address = 1*digit "." 1*digit "." 1*digit "." 1*digit
//
const HOST_REGEX =
new RegExp("^(?:" +
// *( domainlabel "." )
"(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\\.)*" +
// toplabel
"[a-z](?:[a-z0-9-]*[a-z0-9])?" +
"|" +
// IPv4 address
"\\d+\\.\\d+\\.\\d+\\.\\d+" +
")$",
"i");
/**
* Represents the identity of a server. An identity consists of a set of
* (scheme, host, port) tuples denoted as locations (allowing a single server to
* serve multiple sites or to be used behind both HTTP and HTTPS proxies for any
* host/port). Any incoming request must be to one of these locations, or it
* will be rejected with an HTTP 400 error. One location, denoted as the
* primary location, is the location assigned in contexts where a location
* cannot otherwise be endogenously derived, such as for HTTP/1.0 requests.
*
* A single identity may contain at most one location per unique host/port pair;
* other than that, no restrictions are placed upon what locations may
* constitute an identity.
*/
function ServerIdentity()
{
/** The scheme of the primary location. */
this._primaryScheme = "http";
/** The hostname of the primary location. */
this._primaryHost = "127.0.0.1"
/** The port number of the primary location. */
this._primaryPort = -1;
/**
* The current port number for the corresponding server, stored so that a new
* primary location can always be set if the current one is removed.
*/
this._defaultPort = -1;
/**
* Maps hosts to maps of ports to schemes, e.g. the following would represent
* https://example.com:789/ and http://example.org/:
*
* {
* "xexample.com": { 789: "https" },
* "xexample.org": { 80: "http" }
* }
*
* Note the "x" prefix on hostnames, which prevents collisions with special
* JS names like "prototype".
*/
this._locations = { "xlocalhost": {} };
}
ServerIdentity.prototype =
{
// NSIHTTPSERVERIDENTITY
//
// see nsIHttpServerIdentity.primaryScheme
//
get primaryScheme()
{
if (this._primaryPort === -1)
throw Cr.NS_ERROR_NOT_INITIALIZED;
return this._primaryScheme;
},
//
// see nsIHttpServerIdentity.primaryHost
//
get primaryHost()
{
if (this._primaryPort === -1)
throw Cr.NS_ERROR_NOT_INITIALIZED;
return this._primaryHost;
},
//
// see nsIHttpServerIdentity.primaryPort
//
get primaryPort()
{
if (this._primaryPort === -1)
throw Cr.NS_ERROR_NOT_INITIALIZED;
return this._primaryPort;
},
//
// see nsIHttpServerIdentity.add
//
add: function(scheme, host, port)
{
this._validate(scheme, host, port);
var entry = this._locations["x" + host];
if (!entry)
this._locations["x" + host] = entry = {};
entry[port] = scheme;
},
//
// see nsIHttpServerIdentity.remove
//
remove: function(scheme, host, port)
{
this._validate(scheme, host, port);
var entry = this._locations["x" + host];
if (!entry)
return false;
var present = port in entry;
delete entry[port];
if (this._primaryScheme == scheme &&
this._primaryHost == host &&
this._primaryPort == port &&
this._defaultPort !== -1)
{
// Always keep at least one identity in existence at any time, unless
// we're in the process of shutting down (the last condition above).
this._primaryPort = -1;
this._initialize(this._defaultPort, false);
}
return present;
},
//
// see nsIHttpServerIdentity.has
//
has: function(scheme, host, port)
{
this._validate(scheme, host, port);
return "x" + host in this._locations &&
scheme === this._locations["x" + host][port];
},
//
// see nsIHttpServerIdentity.has
//
getScheme: function(host, port)
{
this._validate("http", host, port);
var entry = this._locations["x" + host];
if (!entry)
return "";
return entry[port] || "";
},
//
// see nsIHttpServerIdentity.setPrimary
//
setPrimary: function(scheme, host, port)
{
this._validate(scheme, host, port);
this.add(scheme, host, port);
this._primaryScheme = scheme;
this._primaryHost = host;
this._primaryPort = port;
},
// NSISUPPORTS
//
// see nsISupports.QueryInterface
//
QueryInterface: function(iid)
{
if (iid.equals(Ci.nsIHttpServerIdentity) || iid.equals(Ci.nsISupports))
return this;
throw Cr.NS_ERROR_NO_INTERFACE;
},
// PRIVATE IMPLEMENTATION
/**
* Initializes the primary name for the corresponding server, based on the
* provided port number.
*/
_initialize: function(port, addSecondaryDefault)
{
if (this._primaryPort !== -1)
this.add("http", "localhost", port);
else
this.setPrimary("http", "localhost", port);
this._defaultPort = port;
// Only add this if we're being called at server startup
if (addSecondaryDefault)
this.add("http", "127.0.0.1", port);
},
/**
* Called at server shutdown time, unsets the primary location only if it was
* the default-assigned location and removes the default location from the
* set of locations used.
*/
_teardown: function()
{
// Not the default primary location, nothing special to do here
this.remove("http", "127.0.0.1", this._defaultPort);
// This is a *very* tricky bit of reasoning here; make absolutely sure the
// tests for this code pass before you commit changes to it.
if (this._primaryScheme == "http" &&
this._primaryHost == "localhost" &&
this._primaryPort == this._defaultPort)
{
// Make sure we don't trigger the readding logic in .remove(), then remove
// the default location.
var port = this._defaultPort;
this._defaultPort = -1;
this.remove("http", "localhost", port);
// Ensure a server start triggers the setPrimary() path in ._initialize()
this._primaryPort = -1;
}
else
{
// No reason not to remove directly as it's not our primary location
this.remove("http", "localhost", this._defaultPort);
}
},
/**
* Ensures scheme, host, and port are all valid with respect to RFC 2396.
*
* @throws NS_ERROR_ILLEGAL_VALUE
* if any argument doesn't match the corresponding production
*/
_validate: function(scheme, host, port)
{
if (scheme !== "http" && scheme !== "https")
{
dumpn("*** server only supports http/https schemes: '" + scheme + "'");
dumpStack();
throw Cr.NS_ERROR_ILLEGAL_VALUE;
}
if (!HOST_REGEX.test(host))
{
dumpn("*** unexpected host: '" + host + "'");
throw Cr.NS_ERROR_ILLEGAL_VALUE;
}
if (port < 0 || port > 65535)
{
dumpn("*** unexpected port: '" + port + "'");
throw Cr.NS_ERROR_ILLEGAL_VALUE;
}
}
};
/**
* Represents a connection to the server (and possibly in the future the thread
* on which the connection is processed).
*
* @param input : nsIInputStream
* stream from which incoming data on the connection is read
* @param output : nsIOutputStream
* stream to write data out the connection
* @param server : nsHttpServer
* the server handling the connection
* @param port : int
* the port on which the server is running
* @param outgoingPort : int
* the outgoing port used by this connection
* @param number : uint
* a serial number used to uniquely identify this connection
*/
function Connection(input, output, server, port, outgoingPort, number)
{
dumpn("*** opening new connection " + number + " on port " + outgoingPort);
/** Stream of incoming data. */
this.input = input;
/** Stream for outgoing data. */
this.output = output;
/** The server associated with this request. */
this.server = server;
/** The port on which the server is running. */
this.port = port;
/** The outgoing poort used by this connection. */
this._outgoingPort = outgoingPort;
/** The serial number of this connection. */
this.number = number;
/**
* The request for which a response is being generated, null if the
* incoming request has not been fully received or if it had errors.
*/
this.request = null;
/** State variables for debugging. */
this._closed = this._processed = false;
}
Connection.prototype =
{
/** Closes this connection's input/output streams. */
close: function()
{
dumpn("*** closing connection " + this.number +
" on port " + this._outgoingPort);
this.input.close();
this.output.close();
this._closed = true;
var server = this.server;
server._connectionClosed(this);
// If an error triggered a server shutdown, act on it now
if (server._doQuit)
server.stop(function() { /* not like we can do anything better */ });
},
/**
* Initiates processing of this connection, using the data in the given
* request.
*
* @param request : Request
* the request which should be processed
*/
process: function(request)
{
NS_ASSERT(!this._closed && !this._processed);
this._processed = true;
this.request = request;
this.server._handler.handleResponse(this);
},
/**
* Initiates processing of this connection, generating a response with the
* given HTTP error code.
*
* @param code : uint
* an HTTP code, so in the range [0, 1000)
* @param request : Request
* incomplete data about the incoming request (since there were errors
* during its processing
*/
processError: function(code, request)
{
NS_ASSERT(!this._closed && !this._processed);
this._processed = true;
this.request = request;
this.server._handler.handleError(code, this);
},
/** Converts this to a string for debugging purposes. */
toString: function()
{
return "<Connection(" + this.number +
(this.request ? ", " + this.request.path : "") +"): " +
(this._closed ? "closed" : "open") + ">";
}
};
/** Returns an array of count bytes from the given input stream. */
function readBytes(inputStream, count)
{
return new BinaryInputStream(inputStream).readByteArray(count);
}
/** Request reader processing states; see RequestReader for details. */
const READER_IN_REQUEST_LINE = 0;
const READER_IN_HEADERS = 1;
const READER_IN_BODY = 2;
const READER_FINISHED = 3;
/**
* Reads incoming request data asynchronously, does any necessary preprocessing,
* and forwards it to the request handler. Processing occurs in three states:
*
* READER_IN_REQUEST_LINE Reading the request's status line
* READER_IN_HEADERS Reading headers in the request
* READER_IN_BODY Reading the body of the request
* READER_FINISHED Entire request has been read and processed
*
* During the first two stages, initial metadata about the request is gathered
* into a Request object. Once the status line and headers have been processed,
* we start processing the body of the request into the Request. Finally, when
* the entire body has been read, we create a Response and hand it off to the
* ServerHandler to be given to the appropriate request handler.
*
* @param connection : Connection
* the connection for the request being read
*/
function RequestReader(connection)
{
/** Connection metadata for this request. */
this._connection = connection;
/**
* A container providing line-by-line access to the raw bytes that make up the
* data which has been read from the connection but has not yet been acted
* upon (by passing it to the request handler or by extracting request
* metadata from it).
*/
this._data = new LineData();
/**
* The amount of data remaining to be read from the body of this request.
* After all headers in the request have been read this is the value in the
* Content-Length header, but as the body is read its value decreases to zero.
*/
this._contentLength = 0;
/** The current state of parsing the incoming request. */
this._state = READER_IN_REQUEST_LINE;
/** Metadata constructed from the incoming request for the request handler. */
this._metadata = new Request(connection.port);
/**
* Used to preserve state if we run out of line data midway through a
* multi-line header. _lastHeaderName stores the name of the header, while
* _lastHeaderValue stores the value we've seen so far for the header.
*
* These fields are always either both undefined or both strings.
*/
this._lastHeaderName = this._lastHeaderValue = undefined;
}
RequestReader.prototype =
{
// NSIINPUTSTREAMCALLBACK
/**
* Called when more data from the incoming request is available. This method
* then reads the available data from input and deals with that data as
* necessary, depending upon the syntax of already-downloaded data.
*
* @param input : nsIAsyncInputStream
* the stream of incoming data from the connection
*/
onInputStreamReady: function(input)
{
dumpn("*** onInputStreamReady(input=" + input + ") on thread " +
gThreadManager.currentThread + " (main is " +
gThreadManager.mainThread + ")");
dumpn("*** this._state == " + this._state);
// Handle cases where we get more data after a request error has been
// discovered but *before* we can close the connection.
var data = this._data;
if (!data)
return;
try
{
data.appendBytes(readBytes(input, input.available()));
}
catch (e)
{
if (e.result !== Cr.NS_BASE_STREAM_CLOSED)
{
dumpn("*** WARNING: unexpected error when reading from socket; will " +
"be treated as if the input stream had been closed");
dumpn("*** WARNING: actual error was: " + e);
}
// We've lost a race -- input has been closed, but we're still expecting
// to read more data. available() will throw in this case, and since
// we're dead in the water now, destroy the connection.
dumpn("*** onInputStreamReady called on a closed input, destroying " +
"connection");
this._connection.close();
return;
}
switch (this._state)
{
default:
NS_ASSERT(false, "invalid state: " + this._state);
break;
case READER_IN_REQUEST_LINE:
if (!this._processRequestLine())
break;
/* fall through */
case READER_IN_HEADERS:
if (!this._processHeaders())
break;
/* fall through */
case READER_IN_BODY:
this._processBody();
}
if (this._state != READER_FINISHED)
input.asyncWait(this, 0, 0, gThreadManager.currentThread);
},
//
// see nsISupports.QueryInterface
//
QueryInterface: function(aIID)
{
if (aIID.equals(Ci.nsIInputStreamCallback) ||
aIID.equals(Ci.nsISupports))
return this;
throw Cr.NS_ERROR_NO_INTERFACE;
},
// PRIVATE API
/**
* Processes unprocessed, downloaded data as a request line.
*
* @returns boolean
* true iff the request line has been fully processed
*/
_processRequestLine: function()
{
NS_ASSERT(this._state == READER_IN_REQUEST_LINE);
// Servers SHOULD ignore any empty line(s) received where a Request-Line
// is expected (section 4.1).
var data = this._data;
var line = {};
var readSuccess;
while ((readSuccess = data.readLine(line)) && line.value == "")
dumpn("*** ignoring beginning blank line...");
// if we don't have a full line, wait until we do
if (!readSuccess)
return false;
// we have the first non-blank line
try
{
this._parseRequestLine(line.value);
this._state = READER_IN_HEADERS;
return true;
}
catch (e)
{
this._handleError(e);
return false;
}
},
/**
* Processes stored data, assuming it is either at the beginning or in
* the middle of processing request headers.
*
* @returns boolean
* true iff header data in the request has been fully processed
*/
_processHeaders: function()
{
NS_ASSERT(this._state == READER_IN_HEADERS);
// XXX things to fix here:
//
// - need to support RFC 2047-encoded non-US-ASCII characters
try
{
var done = this._parseHeaders();
if (done)
{
var request = this._metadata;
// XXX this is wrong for requests with transfer-encodings applied to
// them, particularly chunked (which by its nature can have no
// meaningful Content-Length header)!
this._contentLength = request.hasHeader("Content-Length")
? parseInt(request.getHeader("Content-Length"), 10)
: 0;
dumpn("_processHeaders, Content-length=" + this._contentLength);
this._state = READER_IN_BODY;
}
return done;
}
catch (e)
{
this._handleError(e);
return false;
}
},
/**
* Processes stored data, assuming it is either at the beginning or in
* the middle of processing the request body.
*
* @returns boolean
* true iff the request body has been fully processed
*/
_processBody: function()
{
NS_ASSERT(this._state == READER_IN_BODY);
// XXX handle chunked transfer-coding request bodies!
try
{
if (this._contentLength > 0)
{
var data = this._data.purge();
var count = Math.min(data.length, this._contentLength);
dumpn("*** loading data=" + data + " len=" + data.length +
" excess=" + (data.length - count));
var bos = new BinaryOutputStream(this._metadata._bodyOutputStream);
bos.writeByteArray(data, count);
this._contentLength -= count;
}
dumpn("*** remaining body data len=" + this._contentLength);
if (this._contentLength == 0)
{
this._validateRequest();
this._state = READER_FINISHED;
this._handleResponse();
return true;
}
return false;
}
catch (e)
{
this._handleError(e);
return false;
}
},
/**
* Does various post-header checks on the data in this request.
*
* @throws : HttpError
* if the request was malformed in some way
*/
_validateRequest: function()
{
NS_ASSERT(this._state == READER_IN_BODY);
dumpn("*** _validateRequest");
var metadata = this._metadata;
var headers = metadata._headers;
// 19.6.1.1 -- servers MUST report 400 to HTTP/1.1 requests w/o Host header
var identity = this._connection.server.identity;
if (metadata._httpVersion.atLeast(nsHttpVersion.HTTP_1_1))
{
if (!headers.hasHeader("Host"))
{
dumpn("*** malformed HTTP/1.1 or greater request with no Host header!");
throw HTTP_400;
}
// If the Request-URI wasn't absolute, then we need to determine our host.
// We have to determine what scheme was used to access us based on the
// server identity data at this point, because the request just doesn't
// contain enough data on its own to do this, sadly.
if (!metadata._host)
{
var host, port;
var hostPort = headers.getHeader("Host");
var colon = hostPort.indexOf(":");
if (colon < 0)
{
host = hostPort;
port = "";
}
else
{
host = hostPort.substring(0, colon);
port = hostPort.substring(colon + 1);
}
// NB: We allow an empty port here because, oddly, a colon may be
// present even without a port number, e.g. "example.com:"; in this
// case the default port applies.
if (!HOST_REGEX.test(host) || !/^\d*$/.test(port))
{
dumpn("*** malformed hostname (" + hostPort + ") in Host " +
"header, 400 time");
throw HTTP_400;
}
// If we're not given a port, we're stuck, because we don't know what
// scheme to use to look up the correct port here, in general. Since
// the HTTPS case requires a tunnel/proxy and thus requires that the
// requested URI be absolute (and thus contain the necessary
// information), let's assume HTTP will prevail and use that.
port = +port || 80;
var scheme = identity.getScheme(host, port);
if (!scheme)
{
dumpn("*** unrecognized hostname (" + hostPort + ") in Host " +
"header, 400 time");
throw HTTP_400;
}
metadata._scheme = scheme;
metadata._host = host;
metadata._port = port;
}
}
else
{
NS_ASSERT(metadata._host === undefined,
"HTTP/1.0 doesn't allow absolute paths in the request line!");
metadata._scheme = identity.primaryScheme;
metadata._host = identity.primaryHost;
metadata._port = identity.primaryPort;
}
NS_ASSERT(identity.has(metadata._scheme, metadata._host, metadata._port),
"must have a location we recognize by now!");
},
/**
* Handles responses in case of error, either in the server or in the request.
*
* @param e
* the specific error encountered, which is an HttpError in the case where
* the request is in some way invalid or cannot be fulfilled; if this isn't
* an HttpError we're going to be paranoid and shut down, because that
* shouldn't happen, ever
*/
_handleError: function(e)
{
// Don't fall back into normal processing!
this._state = READER_FINISHED;
var server = this._connection.server;
if (e instanceof HttpError)
{
var code = e.code;
}
else
{
dumpn("!!! UNEXPECTED ERROR: " + e +
(e.lineNumber ? ", line " + e.lineNumber : ""));
// no idea what happened -- be paranoid and shut down
code = 500;
server._requestQuit();
}
// make attempted reuse of data an error
this._data = null;
this._connection.processError(code, this._metadata);
},
/**
* Now that we've read the request line and headers, we can actually hand off
* the request to be handled.
*
* This method is called once per request, after the request line and all
* headers and the body, if any, have been received.
*/
_handleResponse: function()
{
NS_ASSERT(this._state == READER_FINISHED);
// We don't need the line-based data any more, so make attempted reuse an
// error.
this._data = null;
this._connection.process(this._metadata);
},
// PARSING
/**
* Parses the request line for the HTTP request associated with this.
*
* @param line : string
* the request line
*/
_parseRequestLine: function(line)
{
NS_ASSERT(this._state == READER_IN_REQUEST_LINE);
dumpn("*** _parseRequestLine('" + line + "')");
var metadata = this._metadata;
// clients and servers SHOULD accept any amount of SP or HT characters
// between fields, even though only a single SP is required (section 19.3)
var request = line.split(/[ \t]+/);
if (!request || request.length != 3)
throw HTTP_400;
metadata._method = request[0];
// get the HTTP version
var ver = request[2];
var match = ver.match(/^HTTP\/(\d+\.\d+)$/);
if (!match)
throw HTTP_400;
// determine HTTP version
try
{
metadata._httpVersion = new nsHttpVersion(match[1]);
if (!metadata._httpVersion.atLeast(nsHttpVersion.HTTP_1_0))
throw "unsupported HTTP version";
}
catch (e)
{
// we support HTTP/1.0 and HTTP/1.1 only
throw HTTP_501;
}
var fullPath = request[1];
var serverIdentity = this._connection.server.identity;
var scheme, host, port;
if (fullPath.charAt(0) != "/")
{
// No absolute paths in the request line in HTTP prior to 1.1
if (!metadata._httpVersion.atLeast(nsHttpVersion.HTTP_1_1))
throw HTTP_400;
try
{
var uri = Cc["@mozilla.org/network/io-service;1"]
.getService(Ci.nsIIOService)
.newURI(fullPath, null, null);
fullPath = uri.path;
scheme = uri.scheme;
host = metadata._host = uri.asciiHost;
port = uri.port;
if (port === -1)
{
if (scheme === "http")
port = 80;
else if (scheme === "https")
port = 443;
else
throw HTTP_400;
}
}
catch (e)
{
// If the host is not a valid host on the server, the response MUST be a
// 400 (Bad Request) error message (section 5.2). Alternately, the URI
// is malformed.
throw HTTP_400;
}
if (!serverIdentity.has(scheme, host, port) || fullPath.charAt(0) != "/")
throw HTTP_400;
}
var splitter = fullPath.indexOf("?");
if (splitter < 0)
{
// _queryString already set in ctor
metadata._path = fullPath;
}
else
{
metadata._path = fullPath.substring(0, splitter);
metadata._queryString = fullPath.substring(splitter + 1);
}
metadata._scheme = scheme;
metadata._host = host;
metadata._port = port;
},
/**
* Parses all available HTTP headers in this until the header-ending CRLFCRLF,
* adding them to the store of headers in the request.
*
* @throws
* HTTP_400 if the headers are malformed
* @returns boolean
* true if all headers have now been processed, false otherwise
*/
_parseHeaders: function()
{
NS_ASSERT(this._state == READER_IN_HEADERS);
dumpn("*** _parseHeaders");
var data = this._data;
var headers = this._metadata._headers;
var lastName = this._lastHeaderName;
var lastVal = this._lastHeaderValue;
var line = {};
while (true)
{
NS_ASSERT(!((lastVal === undefined) ^ (lastName === undefined)),
lastName === undefined ?
"lastVal without lastName? lastVal: '" + lastVal + "'" :
"lastName without lastVal? lastName: '" + lastName + "'");
if (!data.readLine(line))
{
// save any data we have from the header we might still be processing
this._lastHeaderName = lastName;
this._lastHeaderValue = lastVal;
return false;
}
var lineText = line.value;
var firstChar = lineText.charAt(0);
// blank line means end of headers
if (lineText == "")
{
// we're finished with the previous header
if (lastName)
{
try
{
headers.setHeader(lastName, lastVal, true);
}
catch (e)
{
dumpn("*** e == " + e);
throw HTTP_400;
}
}
else
{
// no headers in request -- valid for HTTP/1.0 requests
}
// either way, we're done processing headers
this._state = READER_IN_BODY;
return true;
}
else if (firstChar == " " || firstChar == "\t")
{
// multi-line header if we've already seen a header line
if (!lastName)
{
// we don't have a header to continue!
throw HTTP_400;
}
// append this line's text to the value; starts with SP/HT, so no need
// for separating whitespace
lastVal += lineText;
}
else
{
// we have a new header, so set the old one (if one existed)
if (lastName)
{
try
{
headers.setHeader(lastName, lastVal, true);
}
catch (e)
{
dumpn("*** e == " + e);
throw HTTP_400;
}
}
var colon = lineText.indexOf(":"); // first colon must be splitter
if (colon < 1)
{
// no colon or missing header field-name
throw HTTP_400;
}
// set header name, value (to be set in the next loop, usually)
lastName = lineText.substring(0, colon);
lastVal = lineText.substring(colon + 1);
} // empty, continuation, start of header
} // while (true)
}
};
/** The character codes for CR and LF. */
const CR = 0x0D, LF = 0x0A;
/**
* Calculates the number of characters before the first CRLF pair in array, or
* -1 if the array contains no CRLF pair.
*
* @param array : Array
* an array of numbers in the range [0, 256), each representing a single
* character; the first CRLF is the lowest index i where
* |array[i] == "\r".charCodeAt(0)| and |array[i+1] == "\n".charCodeAt(0)|,
* if such an |i| exists, and -1 otherwise
* @returns int
* the index of the first CRLF if any were present, -1 otherwise
*/
function findCRLF(array)
{
for (var i = array.indexOf(CR); i >= 0; i = array.indexOf(CR, i + 1))
{
if (array[i + 1] == LF)
return i;
}
return -1;
}
/**
* A container which provides line-by-line access to the arrays of bytes with
* which it is seeded.
*/
function LineData()
{
/** An array of queued bytes from which to get line-based characters. */
this._data = [];
}
LineData.prototype =
{
/**
* Appends the bytes in the given array to the internal data cache maintained
* by this.
*/
appendBytes: function(bytes)
{
Array.prototype.push.apply(this._data, bytes);
},
/**
* Removes and returns a line of data, delimited by CRLF, from this.
*
* @param out
* an object whose "value" property will be set to the first line of text
* present in this, sans CRLF, if this contains a full CRLF-delimited line
* of text; if this doesn't contain enough data, the value of the property
* is undefined
* @returns boolean
* true if a full line of data could be read from the data in this, false
* otherwise
*/
readLine: function(out)
{
var data = this._data;
var length = findCRLF(data);
if (length < 0)
return false;
//
// We have the index of the CR, so remove all the characters, including
// CRLF, from the array with splice, and convert the removed array into the
// corresponding string, from which we then strip the trailing CRLF.
//
// Getting the line in this matter acknowledges that substring is an O(1)
// operation in SpiderMonkey because strings are immutable, whereas two
// splices, both from the beginning of the data, are less likely to be as
// cheap as a single splice plus two extra character conversions.
//
var line = String.fromCharCode.apply(null, data.splice(0, length + 2));
out.value = line.substring(0, length);
return true;
},
/**
* Removes the bytes currently within this and returns them in an array.
*
* @returns Array
* the bytes within this when this method is called
*/
purge: function()
{
var data = this._data;
this._data = [];
return data;
}
};
/**
* Creates a request-handling function for an nsIHttpRequestHandler object.
*/
function createHandlerFunc(handler)
{
return function(metadata, response) { handler.handle(metadata, response); };
}
/**
* The default handler for directories; writes an HTML response containing a
* slightly-formatted directory listing.
*/
function defaultIndexHandler(metadata, response)
{
response.setHeader("Content-Type", "text/html", false);
var path = htmlEscape(decodeURI(metadata.path));
//
// Just do a very basic bit of directory listings -- no need for too much
// fanciness, especially since we don't have a style sheet in which we can
// stick rules (don't want to pollute the default path-space).
//
var body = '<html>\
<head>\
<title>' + path + '</title>\
</head>\
<body>\
<h1>' + path + '</h1>\
<ol style="list-style-type: none">';
var directory = metadata.getProperty("directory");
NS_ASSERT(directory && directory.isDirectory());
var fileList = [];
var files = directory.directoryEntries;
while (files.hasMoreElements())
{
var f = files.getNext().QueryInterface(Ci.nsIFile);
var name = f.leafName;
if (!f.isHidden() &&
(name.charAt(name.length - 1) != HIDDEN_CHAR ||
name.charAt(name.length - 2) == HIDDEN_CHAR))
fileList.push(f);
}
fileList.sort(fileSort);
for (var i = 0; i < fileList.length; i++)
{
var file = fileList[i];
try
{
var name = file.leafName;
if (name.charAt(name.length - 1) == HIDDEN_CHAR)
name = name.substring(0, name.length - 1);
var sep = file.isDirectory() ? "/" : "";
// Note: using " to delimit the attribute here because encodeURIComponent
// passes through '.
var item = '<li><a href="' + encodeURIComponent(name) + sep + '">' +
htmlEscape(name) + sep +
'</a></li>';
body += item;
}
catch (e) { /* some file system error, ignore the file */ }
}
body += ' </ol>\
</body>\
</html>';
response.bodyOutputStream.write(body, body.length);
}
/**
* Sorts a and b (nsIFile objects) into an aesthetically pleasing order.
*/
function fileSort(a, b)
{
var dira = a.isDirectory(), dirb = b.isDirectory();
if (dira && !dirb)
return -1;
if (dirb && !dira)
return 1;
var namea = a.leafName.toLowerCase(), nameb = b.leafName.toLowerCase();
return nameb > namea ? -1 : 1;
}
/**
* Converts an externally-provided path into an internal path for use in
* determining file mappings.
*
* @param path
* the path to convert
* @param encoded
* true if the given path should be passed through decodeURI prior to
* conversion
* @throws URIError
* if path is incorrectly encoded
*/
function toInternalPath(path, encoded)
{
if (encoded)
path = decodeURI(path);
var comps = path.split("/");
for (var i = 0, sz = comps.length; i < sz; i++)
{
var comp = comps[i];
if (comp.charAt(comp.length - 1) == HIDDEN_CHAR)
comps[i] = comp + HIDDEN_CHAR;
}
return comps.join("/");
}
/**
* Adds custom-specified headers for the given file to the given response, if
* any such headers are specified.
*
* @param file
* the file on the disk which is to be written
* @param metadata
* metadata about the incoming request
* @param response
* the Response to which any specified headers/data should be written
* @throws HTTP_500
* if an error occurred while processing custom-specified headers
*/
function maybeAddHeaders(file, metadata, response)
{
var name = file.leafName;
if (name.charAt(name.length - 1) == HIDDEN_CHAR)
name = name.substring(0, name.length - 1);
var headerFile = file.parent;
headerFile.append(name + HEADERS_SUFFIX);
if (!headerFile.exists())
return;
const PR_RDONLY = 0x01;
var fis = new FileInputStream(headerFile, PR_RDONLY, 0444,
Ci.nsIFileInputStream.CLOSE_ON_EOF);
try
{
var lis = new ConverterInputStream(fis, "UTF-8", 1024, 0x0);
lis.QueryInterface(Ci.nsIUnicharLineInputStream);
var line = {value: ""};
var more = lis.readLine(line);
if (!more && line.value == "")
return;
// request line
var status = line.value;
if (status.indexOf("HTTP ") == 0)
{
status = status.substring(5);
var space = status.indexOf(" ");
var code, description;
if (space < 0)
{
code = status;
description = "";
}
else
{
code = status.substring(0, space);
description = status.substring(space + 1, status.length);
}
response.setStatusLine(metadata.httpVersion, parseInt(code, 10), description);
line.value = "";
more = lis.readLine(line);
}
// headers
while (more || line.value != "")
{
var header = line.value;
var colon = header.indexOf(":");
response.setHeader(header.substring(0, colon),
header.substring(colon + 1, header.length),
false); // allow overriding server-set headers
line.value = "";
more = lis.readLine(line);
}
}
catch (e)
{
dumpn("WARNING: error in headers for " + metadata.path + ": " + e);
throw HTTP_500;
}
finally
{
fis.close();
}
}
/**
* An object which handles requests for a server, executing default and
* overridden behaviors as instructed by the code which uses and manipulates it.
* Default behavior includes the paths / and /trace (diagnostics), with some
* support for HTTP error pages for various codes and fallback to HTTP 500 if
* those codes fail for any reason.
*
* @param server : nsHttpServer
* the server in which this handler is being used
*/
function ServerHandler(server)
{
// FIELDS
/**
* The nsHttpServer instance associated with this handler.
*/
this._server = server;
/**
* A FileMap object containing the set of path->nsILocalFile mappings for
* all directory mappings set in the server (e.g., "/" for /var/www/html/,
* "/foo/bar/" for /local/path/, and "/foo/bar/baz/" for /local/path2).
*
* Note carefully: the leading and trailing "/" in each path (not file) are
* removed before insertion to simplify the code which uses this. You have
* been warned!
*/
this._pathDirectoryMap = new FileMap();
/**
* Custom request handlers for the server in which this resides. Path-handler
* pairs are stored as property-value pairs in this property.
*
* @see ServerHandler.prototype._defaultPaths
*/
this._overridePaths = {};
/**
* Custom request handlers for the error handlers in the server in which this
* resides. Path-handler pairs are stored as property-value pairs in this
* property.
*
* @see ServerHandler.prototype._defaultErrors
*/
this._overrideErrors = {};
/**
* Maps file extensions to their MIME types in the server, overriding any
* mapping that might or might not exist in the MIME service.
*/
this._mimeMappings = {};
/**
* The default handler for requests for directories, used to serve directories
* when no index file is present.
*/
this._indexHandler = defaultIndexHandler;
/** Per-path state storage for the server. */
this._state = {};
/** Entire-server state storage. */
this._sharedState = {};
/** Entire-server state storage for nsISupports values. */
this._objectState = {};
}
ServerHandler.prototype =
{
// PUBLIC API
/**
* Handles a request to this server, responding to the request appropriately
* and initiating server shutdown if necessary.
*
* This method never throws an exception.
*
* @param connection : Connection
* the connection for this request
*/
handleResponse: function(connection)
{
var request = connection.request;
var response = new Response(connection);
var path = request.path;
dumpn("*** path == " + path);
try
{
try
{
if (path in this._overridePaths)
{
// explicit paths first, then files based on existing directory mappings,
// then (if the file doesn't exist) built-in server default paths
dumpn("calling override for " + path);
this._overridePaths[path](request, response);
}
else
{
this._handleDefault(request, response);
}
}
catch (e)
{
if (response.partiallySent())
{
response.abort(e);
return;
}
if (!(e instanceof HttpError))
{
dumpn("*** unexpected error: e == " + e);
throw HTTP_500;
}
if (e.code !== 404)
throw e;
dumpn("*** default: " + (path in this._defaultPaths));
response = new Response(connection);
if (path in this._defaultPaths)
this._defaultPaths[path](request, response);
else
throw HTTP_404;
}
}
catch (e)
{
if (response.partiallySent())
{
response.abort(e);
return;
}
var errorCode = "internal";
try
{
if (!(e instanceof HttpError))
throw e;
errorCode = e.code;
dumpn("*** errorCode == " + errorCode);
response = new Response(connection);
if (e.customErrorHandling)
e.customErrorHandling(response);
this._handleError(errorCode, request, response);
return;
}
catch (e2)
{
dumpn("*** error handling " + errorCode + " error: " +
"e2 == " + e2 + ", shutting down server");
connection.server._requestQuit();
response.abort(e2);
return;
}
}
response.complete();
},
//
// see nsIHttpServer.registerFile
//
registerFile: function(path, file)
{
if (!file)
{
dumpn("*** unregistering '" + path + "' mapping");
delete this._overridePaths[path];
return;
}
dumpn("*** registering '" + path + "' as mapping to " + file.path);
file = file.clone();
var self = this;
this._overridePaths[path] =
function(request, response)
{
if (!file.exists())
throw HTTP_404;
response.setStatusLine(request.httpVersion, 200, "OK");
self._writeFileResponse(request, file, response, 0, file.fileSize);
};
},
//
// see nsIHttpServer.registerPathHandler
//
registerPathHandler: function(path, handler)
{
// XXX true path validation!
if (path.charAt(0) != "/")
throw Cr.NS_ERROR_INVALID_ARG;
this._handlerToField(handler, this._overridePaths, path);
},
//
// see nsIHttpServer.registerDirectory
//
registerDirectory: function(path, directory)
{
// strip off leading and trailing '/' so that we can use lastIndexOf when
// determining exactly how a path maps onto a mapped directory --
// conditional is required here to deal with "/".substring(1, 0) being
// converted to "/".substring(0, 1) per the JS specification
var key = path.length == 1 ? "" : path.substring(1, path.length - 1);
// the path-to-directory mapping code requires that the first character not
// be "/", or it will go into an infinite loop
if (key.charAt(0) == "/")
throw Cr.NS_ERROR_INVALID_ARG;
key = toInternalPath(key, false);
if (directory)
{
dumpn("*** mapping '" + path + "' to the location " + directory.path);
this._pathDirectoryMap.put(key, directory);
}
else
{
dumpn("*** removing mapping for '" + path + "'");
this._pathDirectoryMap.put(key, null);
}
},
//
// see nsIHttpServer.registerErrorHandler
//
registerErrorHandler: function(err, handler)
{
if (!(err in HTTP_ERROR_CODES))
dumpn("*** WARNING: registering non-HTTP/1.1 error code " +
"(" + err + ") handler -- was this intentional?");
this._handlerToField(handler, this._overrideErrors, err);
},
//
// see nsIHttpServer.setIndexHandler
//
setIndexHandler: function(handler)
{
if (!handler)
handler = defaultIndexHandler;
else if (typeof(handler) != "function")
handler = createHandlerFunc(handler);
this._indexHandler = handler;
},
//
// see nsIHttpServer.registerContentType
//
registerContentType: function(ext, type)
{
if (!type)
delete this._mimeMappings[ext];
else
this._mimeMappings[ext] = headerUtils.normalizeFieldValue(type);
},
// PRIVATE API
/**
* Sets or remove (if handler is null) a handler in an object with a key.
*
* @param handler
* a handler, either function or an nsIHttpRequestHandler
* @param dict
* The object to attach the handler to.
* @param key
* The field name of the handler.
*/
_handlerToField: function(handler, dict, key)
{
// for convenience, handler can be a function if this is run from xpcshell
if (typeof(handler) == "function")
dict[key] = handler;
else if (handler)
dict[key] = createHandlerFunc(handler);
else
delete dict[key];
},
/**
* Handles a request which maps to a file in the local filesystem (if a base
* path has already been set; otherwise the 404 error is thrown).
*
* @param metadata : Request
* metadata for the incoming request
* @param response : Response
* an uninitialized Response to the given request, to be initialized by a
* request handler
* @throws HTTP_###
* if an HTTP error occurred (usually HTTP_404); note that in this case the
* calling code must handle post-processing of the response
*/
_handleDefault: function(metadata, response)
{
dumpn("*** _handleDefault()");
response.setStatusLine(metadata.httpVersion, 200, "OK");
var path = metadata.path;
NS_ASSERT(path.charAt(0) == "/", "invalid path: <" + path + ">");
// determine the actual on-disk file; this requires finding the deepest
// path-to-directory mapping in the requested URL
var file = this._getFileForPath(path);
// the "file" might be a directory, in which case we either serve the
// contained index.html or make the index handler write the response
if (file.exists() && file.isDirectory())
{
file.append("index.html"); // make configurable?
if (!file.exists() || file.isDirectory())
{
metadata._ensurePropertyBag();
metadata._bag.setPropertyAsInterface("directory", file.parent);
this._indexHandler(metadata, response);
return;
}
}
// alternately, the file might not exist
if (!file.exists())
throw HTTP_404;
var start, end;
if (metadata._httpVersion.atLeast(nsHttpVersion.HTTP_1_1) &&
metadata.hasHeader("Range") &&
this._getTypeFromFile(file) !== SJS_TYPE)
{
var rangeMatch = metadata.getHeader("Range").match(/^bytes=(\d+)?-(\d+)?$/);
if (!rangeMatch)
throw HTTP_400;
if (rangeMatch[1] !== undefined)
start = parseInt(rangeMatch[1], 10);
if (rangeMatch[2] !== undefined)
end = parseInt(rangeMatch[2], 10);
if (start === undefined && end === undefined)
throw HTTP_400;
// No start given, so the end is really the count of bytes from the
// end of the file.
if (start === undefined)
{
start = Math.max(0, file.fileSize - end);
end = file.fileSize - 1;
}
// start and end are inclusive
if (end === undefined || end >= file.fileSize)
end = file.fileSize - 1;
if (start !== undefined && start >= file.fileSize) {
var HTTP_416 = new HttpError(416, "Requested Range Not Satisfiable");
HTTP_416.customErrorHandling = function(errorResponse)
{
maybeAddHeaders(file, metadata, errorResponse);
};
throw HTTP_416;
}
if (end < start)
{
response.setStatusLine(metadata.httpVersion, 200, "OK");
start = 0;
end = file.fileSize - 1;
}
else
{
response.setStatusLine(metadata.httpVersion, 206, "Partial Content");
var contentRange = "bytes " + start + "-" + end + "/" + file.fileSize;
response.setHeader("Content-Range", contentRange);
}
}
else
{
start = 0;
end = file.fileSize - 1;
}
// finally...
dumpn("*** handling '" + path + "' as mapping to " + file.path + " from " +
start + " to " + end + " inclusive");
this._writeFileResponse(metadata, file, response, start, end - start + 1);
},
/**
* Writes an HTTP response for the given file, including setting headers for
* file metadata.
*
* @param metadata : Request
* the Request for which a response is being generated
* @param file : nsILocalFile
* the file which is to be sent in the response
* @param response : Response
* the response to which the file should be written
* @param offset: uint
* the byte offset to skip to when writing
* @param count: uint
* the number of bytes to write
*/
_writeFileResponse: function(metadata, file, response, offset, count)
{
const PR_RDONLY = 0x01;
var type = this._getTypeFromFile(file);
if (type === SJS_TYPE)
{
var fis = new FileInputStream(file, PR_RDONLY, 0444,
Ci.nsIFileInputStream.CLOSE_ON_EOF);
try
{
var sis = new ScriptableInputStream(fis);
var s = Cu.Sandbox(gGlobalObject);
s.importFunction(dump, "dump");
// Define a basic key-value state-preservation API across requests, with
// keys initially corresponding to the empty string.
var self = this;
var path = metadata.path;
s.importFunction(function getState(k)
{
return self._getState(path, k);
});
s.importFunction(function setState(k, v)
{
self._setState(path, k, v);
});
s.importFunction(function getSharedState(k)
{
return self._getSharedState(k);
});
s.importFunction(function setSharedState(k, v)
{
self._setSharedState(k, v);
});
s.importFunction(function getObjectState(k, callback)
{
callback(self._getObjectState(k));
});
s.importFunction(function setObjectState(k, v)
{
self._setObjectState(k, v);
});
try
{
// Alas, the line number in errors dumped to console when calling the
// request handler is simply an offset from where we load the SJS file.
// Work around this in a reasonably non-fragile way by dynamically
// getting the line number where we evaluate the SJS file. Don't
// separate these two lines!
var line = new Error().lineNumber;
Cu.evalInSandbox(sis.read(file.fileSize), s);
}
catch (e)
{
dumpn("*** syntax error in SJS at " + file.path + ": " + e);
throw HTTP_500;
}
try
{
s.handleRequest(metadata, response);
}
catch (e)
{
dump("*** error running SJS at " + file.path + ": " +
e + " on line " +
(e instanceof Error
? e.lineNumber + " in httpd.js"
: (e.lineNumber - line)) + "\n");
throw HTTP_500;
}
}
finally
{
fis.close();
}
}
else
{
try
{
response.setHeader("Last-Modified",
toDateString(file.lastModifiedTime),
false);
}
catch (e) { /* lastModifiedTime threw, ignore */ }
response.setHeader("Content-Type", type, false);
maybeAddHeaders(file, metadata, response);
response.setHeader("Content-Length", "" + count, false);
var fis = new FileInputStream(file, PR_RDONLY, 0444,
Ci.nsIFileInputStream.CLOSE_ON_EOF);
offset = offset || 0;
count = count || file.fileSize;
NS_ASSERT(offset === 0 || offset < file.fileSize, "bad offset");
NS_ASSERT(count >= 0, "bad count");
NS_ASSERT(offset + count <= file.fileSize, "bad total data size");
try
{
if (offset !== 0)
{
// Seek (or read, if seeking isn't supported) to the correct offset so
// the data sent to the client matches the requested range.
if (fis instanceof Ci.nsISeekableStream)
fis.seek(Ci.nsISeekableStream.NS_SEEK_SET, offset);
else
new ScriptableInputStream(fis).read(offset);
}
}
catch (e)
{
fis.close();
throw e;
}
function writeMore()
{
gThreadManager.currentThread
.dispatch(writeData, Ci.nsIThread.DISPATCH_NORMAL);
}
var input = new BinaryInputStream(fis);
var output = new BinaryOutputStream(response.bodyOutputStream);
var writeData =
{
run: function()
{
var chunkSize = Math.min(65536, count);
count -= chunkSize;
NS_ASSERT(count >= 0, "underflow");
try
{
var data = input.readByteArray(chunkSize);
NS_ASSERT(data.length === chunkSize,
"incorrect data returned? got " + data.length +
", expected " + chunkSize);
output.writeByteArray(data, data.length);
if (count === 0)
{
fis.close();
response.finish();
}
else
{
writeMore();
}
}
catch (e)
{
try
{
fis.close();
}
finally
{
response.finish();
}
throw e;
}
}
};
writeMore();
// Now that we know copying will start, flag the response as async.
response.processAsync();
}
},
/**
* Get the value corresponding to a given key for the given path for SJS state
* preservation across requests.
*
* @param path : string
* the path from which the given state is to be retrieved
* @param k : string
* the key whose corresponding value is to be returned
* @returns string
* the corresponding value, which is initially the empty string
*/
_getState: function(path, k)
{
var state = this._state;
if (path in state && k in state[path])
return state[path][k];
return "";
},
/**
* Set the value corresponding to a given key for the given path for SJS state
* preservation across requests.
*
* @param path : string
* the path from which the given state is to be retrieved
* @param k : string
* the key whose corresponding value is to be set
* @param v : string
* the value to be set
*/
_setState: function(path, k, v)
{
if (typeof v !== "string")
throw new Error("non-string value passed");
var state = this._state;
if (!(path in state))
state[path] = {};
state[path][k] = v;
},
/**
* Get the value corresponding to a given key for SJS state preservation
* across requests.
*
* @param k : string
* the key whose corresponding value is to be returned
* @returns string
* the corresponding value, which is initially the empty string
*/
_getSharedState: function(k)
{
var state = this._sharedState;
if (k in state)
return state[k];
return "";
},
/**
* Set the value corresponding to a given key for SJS state preservation
* across requests.
*
* @param k : string
* the key whose corresponding value is to be set
* @param v : string
* the value to be set
*/
_setSharedState: function(k, v)
{
if (typeof v !== "string")
throw new Error("non-string value passed");
this._sharedState[k] = v;
},
/**
* Returns the object associated with the given key in the server for SJS
* state preservation across requests.
*
* @param k : string
* the key whose corresponding object is to be returned
* @returns nsISupports
* the corresponding object, or null if none was present
*/
_getObjectState: function(k)
{
if (typeof k !== "string")
throw new Error("non-string key passed");
return this._objectState[k] || null;
},
/**
* Sets the object associated with the given key in the server for SJS
* state preservation across requests.
*
* @param k : string
* the key whose corresponding object is to be set
* @param v : nsISupports
* the object to be associated with the given key; may be null
*/
_setObjectState: function(k, v)
{
if (typeof k !== "string")
throw new Error("non-string key passed");
if (typeof v !== "object")
throw new Error("non-object value passed");
if (v && !("QueryInterface" in v))
{
throw new Error("must pass an nsISupports; use wrappedJSObject to ease " +
"pain when using the server from JS");
}
this._objectState[k] = v;
},
/**
* Gets a content-type for the given file, first by checking for any custom
* MIME-types registered with this handler for the file's extension, second by
* asking the global MIME service for a content-type, and finally by failing
* over to application/octet-stream.
*
* @param file : nsIFile
* the nsIFile for which to get a file type
* @returns string
* the best content-type which can be determined for the file
*/
_getTypeFromFile: function(file)
{
try
{
var name = file.leafName;
var dot = name.lastIndexOf(".");
if (dot > 0)
{
var ext = name.slice(dot + 1);
if (ext in this._mimeMappings)
return this._mimeMappings[ext];
}
return Cc["@mozilla.org/uriloader/external-helper-app-service;1"]
.getService(Ci.nsIMIMEService)
.getTypeFromFile(file);
}
catch (e)
{
return "application/octet-stream";
}
},
/**
* Returns the nsILocalFile which corresponds to the path, as determined using
* all registered path->directory mappings and any paths which are explicitly
* overridden.
*
* @param path : string
* the server path for which a file should be retrieved, e.g. "/foo/bar"
* @throws HttpError
* when the correct action is the corresponding HTTP error (i.e., because no
* mapping was found for a directory in path, the referenced file doesn't
* exist, etc.)
* @returns nsILocalFile
* the file to be sent as the response to a request for the path
*/
_getFileForPath: function(path)
{
// decode and add underscores as necessary
try
{
path = toInternalPath(path, true);
}
catch (e)
{
throw HTTP_400; // malformed path
}
// next, get the directory which contains this path
var pathMap = this._pathDirectoryMap;
// An example progression of tmp for a path "/foo/bar/baz/" might be:
// "foo/bar/baz/", "foo/bar/baz", "foo/bar", "foo", ""
var tmp = path.substring(1);
while (true)
{
// do we have a match for current head of the path?
var file = pathMap.get(tmp);
if (file)
{
// XXX hack; basically disable showing mapping for /foo/bar/ when the
// requested path was /foo/bar, because relative links on the page
// will all be incorrect -- we really need the ability to easily
// redirect here instead
if (tmp == path.substring(1) &&
tmp.length != 0 &&
tmp.charAt(tmp.length - 1) != "/")
file = null;
else
break;
}
// if we've finished trying all prefixes, exit
if (tmp == "")
break;
tmp = tmp.substring(0, tmp.lastIndexOf("/"));
}
// no mapping applies, so 404
if (!file)
throw HTTP_404;
// last, get the file for the path within the determined directory
var parentFolder = file.parent;
var dirIsRoot = (parentFolder == null);
// Strategy here is to append components individually, making sure we
// never move above the given directory; this allows paths such as
// "<file>/foo/../bar" but prevents paths such as "<file>/../base-sibling";
// this component-wise approach also means the code works even on platforms
// which don't use "/" as the directory separator, such as Windows
var leafPath = path.substring(tmp.length + 1);
var comps = leafPath.split("/");
for (var i = 0, sz = comps.length; i < sz; i++)
{
var comp = comps[i];
if (comp == "..")
file = file.parent;
else if (comp == "." || comp == "")
continue;
else
file.append(comp);
if (!dirIsRoot && file.equals(parentFolder))
throw HTTP_403;
}
return file;
},
/**
* Writes the error page for the given HTTP error code over the given
* connection.
*
* @param errorCode : uint
* the HTTP error code to be used
* @param connection : Connection
* the connection on which the error occurred
*/
handleError: function(errorCode, connection)
{
var response = new Response(connection);
dumpn("*** error in request: " + errorCode);
this._handleError(errorCode, new Request(connection.port), response);
},
/**
* Handles a request which generates the given error code, using the
* user-defined error handler if one has been set, gracefully falling back to
* the x00 status code if the code has no handler, and failing to status code
* 500 if all else fails.
*
* @param errorCode : uint
* the HTTP error which is to be returned
* @param metadata : Request
* metadata for the request, which will often be incomplete since this is an
* error
* @param response : Response
* an uninitialized Response should be initialized when this method
* completes with information which represents the desired error code in the
* ideal case or a fallback code in abnormal circumstances (i.e., 500 is a
* fallback for 505, per HTTP specs)
*/
_handleError: function(errorCode, metadata, response)
{
if (!metadata)
throw Cr.NS_ERROR_NULL_POINTER;
var errorX00 = errorCode - (errorCode % 100);
try
{
if (!(errorCode in HTTP_ERROR_CODES))
dumpn("*** WARNING: requested invalid error: " + errorCode);
// RFC 2616 says that we should try to handle an error by its class if we
// can't otherwise handle it -- if that fails, we revert to handling it as
// a 500 internal server error, and if that fails we throw and shut down
// the server
// actually handle the error
try
{
if (errorCode in this._overrideErrors)
this._overrideErrors[errorCode](metadata, response);
else
this._defaultErrors[errorCode](metadata, response);
}
catch (e)
{
if (response.partiallySent())
{
response.abort(e);
return;
}
// don't retry the handler that threw
if (errorX00 == errorCode)
throw HTTP_500;
dumpn("*** error in handling for error code " + errorCode + ", " +
"falling back to " + errorX00 + "...");
response = new Response(response._connection);
if (errorX00 in this._overrideErrors)
this._overrideErrors[errorX00](metadata, response);
else if (errorX00 in this._defaultErrors)
this._defaultErrors[errorX00](metadata, response);
else
throw HTTP_500;
}
}
catch (e)
{
if (response.partiallySent())
{
response.abort();
return;
}
// we've tried everything possible for a meaningful error -- now try 500
dumpn("*** error in handling for error code " + errorX00 + ", falling " +
"back to 500...");
try
{
response = new Response(response._connection);
if (500 in this._overrideErrors)
this._overrideErrors[500](metadata, response);
else
this._defaultErrors[500](metadata, response);
}
catch (e2)
{
dumpn("*** multiple errors in default error handlers!");
dumpn("*** e == " + e + ", e2 == " + e2);
response.abort(e2);
return;
}
}
response.complete();
},
// FIELDS
/**
* This object contains the default handlers for the various HTTP error codes.
*/
_defaultErrors:
{
400: function(metadata, response)
{
// none of the data in metadata is reliable, so hard-code everything here
response.setStatusLine("1.1", 400, "Bad Request");
response.setHeader("Content-Type", "text/plain", false);
var body = "Bad request\n";
response.bodyOutputStream.write(body, body.length);
},
403: function(metadata, response)
{
response.setStatusLine(metadata.httpVersion, 403, "Forbidden");
response.setHeader("Content-Type", "text/html", false);
var body = "<html>\
<head><title>403 Forbidden</title></head>\
<body>\
<h1>403 Forbidden</h1>\
</body>\
</html>";
response.bodyOutputStream.write(body, body.length);
},
404: function(metadata, response)
{
response.setStatusLine(metadata.httpVersion, 404, "Not Found");
response.setHeader("Content-Type", "text/html", false);
var body = "<html>\
<head><title>404 Not Found</title></head>\
<body>\
<h1>404 Not Found</h1>\
<p>\
<span style='font-family: monospace;'>" +
htmlEscape(metadata.path) +
"</span> was not found.\
</p>\
</body>\
</html>";
response.bodyOutputStream.write(body, body.length);
},
416: function(metadata, response)
{
response.setStatusLine(metadata.httpVersion,
416,
"Requested Range Not Satisfiable");
response.setHeader("Content-Type", "text/html", false);
var body = "<html>\
<head>\
<title>416 Requested Range Not Satisfiable</title></head>\
<body>\
<h1>416 Requested Range Not Satisfiable</h1>\
<p>The byte range was not valid for the\
requested resource.\
</p>\
</body>\
</html>";
response.bodyOutputStream.write(body, body.length);
},
500: function(metadata, response)
{
response.setStatusLine(metadata.httpVersion,
500,
"Internal Server Error");
response.setHeader("Content-Type", "text/html", false);
var body = "<html>\
<head><title>500 Internal Server Error</title></head>\
<body>\
<h1>500 Internal Server Error</h1>\
<p>Something's broken in this server and\
needs to be fixed.</p>\
</body>\
</html>";
response.bodyOutputStream.write(body, body.length);
},
501: function(metadata, response)
{
response.setStatusLine(metadata.httpVersion, 501, "Not Implemented");
response.setHeader("Content-Type", "text/html", false);
var body = "<html>\
<head><title>501 Not Implemented</title></head>\
<body>\
<h1>501 Not Implemented</h1>\
<p>This server is not (yet) Apache.</p>\
</body>\
</html>";
response.bodyOutputStream.write(body, body.length);
},
505: function(metadata, response)
{
response.setStatusLine("1.1", 505, "HTTP Version Not Supported");
response.setHeader("Content-Type", "text/html", false);
var body = "<html>\
<head><title>505 HTTP Version Not Supported</title></head>\
<body>\
<h1>505 HTTP Version Not Supported</h1>\
<p>This server only supports HTTP/1.0 and HTTP/1.1\
connections.</p>\
</body>\
</html>";
response.bodyOutputStream.write(body, body.length);
}
},
/**
* Contains handlers for the default set of URIs contained in this server.
*/
_defaultPaths:
{
"/": function(metadata, response)
{
response.setStatusLine(metadata.httpVersion, 200, "OK");
response.setHeader("Content-Type", "text/html", false);
var body = "<html>\
<head><title>httpd.js</title></head>\
<body>\
<h1>httpd.js</h1>\
<p>If you're seeing this page, httpd.js is up and\
serving requests! Now set a base path and serve some\
files!</p>\
</body>\
</html>";
response.bodyOutputStream.write(body, body.length);
},
"/trace": function(metadata, response)
{
response.setStatusLine(metadata.httpVersion, 200, "OK");
response.setHeader("Content-Type", "text/plain", false);
var body = "Request-URI: " +
metadata.scheme + "://" + metadata.host + ":" + metadata.port +
metadata.path + "\n\n";
body += "Request (semantically equivalent, slightly reformatted):\n\n";
body += metadata.method + " " + metadata.path;
if (metadata.queryString)
body += "?" + metadata.queryString;
body += " HTTP/" + metadata.httpVersion + "\r\n";
var headEnum = metadata.headers;
while (headEnum.hasMoreElements())
{
var fieldName = headEnum.getNext()
.QueryInterface(Ci.nsISupportsString)
.data;
body += fieldName + ": " + metadata.getHeader(fieldName) + "\r\n";
}
response.bodyOutputStream.write(body, body.length);
}
}
};
/**
* Maps absolute paths to files on the local file system (as nsILocalFiles).
*/
function FileMap()
{
/** Hash which will map paths to nsILocalFiles. */
this._map = {};
}
FileMap.prototype =
{
// PUBLIC API
/**
* Maps key to a clone of the nsILocalFile value if value is non-null;
* otherwise, removes any extant mapping for key.
*
* @param key : string
* string to which a clone of value is mapped
* @param value : nsILocalFile
* the file to map to key, or null to remove a mapping
*/
put: function(key, value)
{
if (value)
this._map[key] = value.clone();
else
delete this._map[key];
},
/**
* Returns a clone of the nsILocalFile mapped to key, or null if no such
* mapping exists.
*
* @param key : string
* key to which the returned file maps
* @returns nsILocalFile
* a clone of the mapped file, or null if no mapping exists
*/
get: function(key)
{
var val = this._map[key];
return val ? val.clone() : null;
}
};
// Response CONSTANTS
// token = *<any CHAR except CTLs or separators>
// CHAR = <any US-ASCII character (0-127)>
// CTL = <any US-ASCII control character (0-31) and DEL (127)>
// separators = "(" | ")" | "<" | ">" | "@"
// | "," | ";" | ":" | "\" | <">
// | "/" | "[" | "]" | "?" | "="
// | "{" | "}" | SP | HT
const IS_TOKEN_ARRAY =
[0, 0, 0, 0, 0, 0, 0, 0, // 0
0, 0, 0, 0, 0, 0, 0, 0, // 8
0, 0, 0, 0, 0, 0, 0, 0, // 16
0, 0, 0, 0, 0, 0, 0, 0, // 24
0, 1, 0, 1, 1, 1, 1, 1, // 32
0, 0, 1, 1, 0, 1, 1, 0, // 40
1, 1, 1, 1, 1, 1, 1, 1, // 48
1, 1, 0, 0, 0, 0, 0, 0, // 56
0, 1, 1, 1, 1, 1, 1, 1, // 64
1, 1, 1, 1, 1, 1, 1, 1, // 72
1, 1, 1, 1, 1, 1, 1, 1, // 80
1, 1, 1, 0, 0, 0, 1, 1, // 88
1, 1, 1, 1, 1, 1, 1, 1, // 96
1, 1, 1, 1, 1, 1, 1, 1, // 104
1, 1, 1, 1, 1, 1, 1, 1, // 112
1, 1, 1, 0, 1, 0, 1]; // 120
/**
* Determines whether the given character code is a CTL.
*
* @param code : uint
* the character code
* @returns boolean
* true if code is a CTL, false otherwise
*/
function isCTL(code)
{
return (code >= 0 && code <= 31) || (code == 127);
}
/**
* Represents a response to an HTTP request, encapsulating all details of that
* response. This includes all headers, the HTTP version, status code and
* explanation, and the entity itself.
*
* @param connection : Connection
* the connection over which this response is to be written
*/
function Response(connection)
{
/** The connection over which this response will be written. */
this._connection = connection;
/**
* The HTTP version of this response; defaults to 1.1 if not set by the
* handler.
*/
this._httpVersion = nsHttpVersion.HTTP_1_1;
/**
* The HTTP code of this response; defaults to 200.
*/
this._httpCode = 200;
/**
* The description of the HTTP code in this response; defaults to "OK".
*/
this._httpDescription = "OK";
/**
* An nsIHttpHeaders object in which the headers in this response should be
* stored. This property is null after the status line and headers have been
* written to the network, and it may be modified up until it is cleared,
* except if this._finished is set first (in which case headers are written
* asynchronously in response to a finish() call not preceded by
* flushHeaders()).
*/
this._headers = new nsHttpHeaders();
/**
* Set to true when this response is ended (completely constructed if possible
* and the connection closed); further actions on this will then fail.
*/
this._ended = false;
/**
* A stream used to hold data written to the body of this response.
*/
this._bodyOutputStream = null;
/**
* A stream containing all data that has been written to the body of this
* response so far. (Async handlers make the data contained in this
* unreliable as a way of determining content length in general, but auxiliary
* saved information can sometimes be used to guarantee reliability.)
*/
this._bodyInputStream = null;
/**
* The stream copier which copies data written to the body by a request
* handler to the network.
*/
this._asyncCopier = null;
/**
* True if this response has been designated as being processed
* asynchronously rather than for the duration of a single call to
* nsIHttpRequestHandler.handle.
*/
this._processAsync = false;
/**
* True iff finish() has been called on this, signaling that no more changes
* to this may be made.
*/
this._finished = false;
/**
* True iff powerSeized() has been called on this, signaling that this
* response is to be handled manually by the response handler (which may then
* send arbitrary data in response, even non-HTTP responses).
*/
this._powerSeized = false;
}
Response.prototype =
{
// PUBLIC CONSTRUCTION API
//
// see nsIHttpResponse.bodyOutputStream
//
get bodyOutputStream()
{
if (this._finished)
throw Cr.NS_ERROR_NOT_AVAILABLE;
if (!this._bodyOutputStream)
{
var pipe = new Pipe(false, false, Response.SEGMENT_SIZE, PR_UINT32_MAX,
null);
this._bodyOutputStream = pipe.outputStream;
this._bodyInputStream = pipe.inputStream;
if (this._processAsync || this._powerSeized)
this._startAsyncProcessor();
}
return this._bodyOutputStream;
},
//
// see nsIHttpResponse.write
//
write: function(data)
{
if (this._finished)
throw Cr.NS_ERROR_NOT_AVAILABLE;
var dataAsString = String(data);
this.bodyOutputStream.write(dataAsString, dataAsString.length);
},
//
// see nsIHttpResponse.setStatusLine
//
setStatusLine: function(httpVersion, code, description)
{
if (!this._headers || this._finished || this._powerSeized)
throw Cr.NS_ERROR_NOT_AVAILABLE;
this._ensureAlive();
if (!(code >= 0 && code < 1000))
throw Cr.NS_ERROR_INVALID_ARG;
try
{
var httpVer;
// avoid version construction for the most common cases
if (!httpVersion || httpVersion == "1.1")
httpVer = nsHttpVersion.HTTP_1_1;
else if (httpVersion == "1.0")
httpVer = nsHttpVersion.HTTP_1_0;
else
httpVer = new nsHttpVersion(httpVersion);
}
catch (e)
{
throw Cr.NS_ERROR_INVALID_ARG;
}
// Reason-Phrase = *<TEXT, excluding CR, LF>
// TEXT = <any OCTET except CTLs, but including LWS>
//
// XXX this ends up disallowing octets which aren't Unicode, I think -- not
// much to do if description is IDL'd as string
if (!description)
description = "";
for (var i = 0; i < description.length; i++)
if (isCTL(description.charCodeAt(i)) && description.charAt(i) != "\t")
throw Cr.NS_ERROR_INVALID_ARG;
// set the values only after validation to preserve atomicity
this._httpDescription = description;
this._httpCode = code;
this._httpVersion = httpVer;
},
//
// see nsIHttpResponse.setHeader
//
setHeader: function(name, value, merge)
{
if (!this._headers || this._finished || this._powerSeized)
throw Cr.NS_ERROR_NOT_AVAILABLE;
this._ensureAlive();
this._headers.setHeader(name, value, merge);
},
//
// see nsIHttpResponse.processAsync
//
processAsync: function()
{
if (this._finished)
throw Cr.NS_ERROR_UNEXPECTED;
if (this._powerSeized)
throw Cr.NS_ERROR_NOT_AVAILABLE;
if (this._processAsync)
return;
this._ensureAlive();
dumpn("*** processing connection " + this._connection.number + " async");
this._processAsync = true;
/*
* Either the bodyOutputStream getter or this method is responsible for
* starting the asynchronous processor and catching writes of data to the
* response body of async responses as they happen, for the purpose of
* forwarding those writes to the actual connection's output stream.
* If bodyOutputStream is accessed first, calling this method will create
* the processor (when it first is clear that body data is to be written
* immediately, not buffered). If this method is called first, accessing
* bodyOutputStream will create the processor. If only this method is
* called, we'll write nothing, neither headers nor the non-existent body,
* until finish() is called. Since that delay is easily avoided by simply
* getting bodyOutputStream or calling write(""), we don't worry about it.
*/
if (this._bodyOutputStream && !this._asyncCopier)
this._startAsyncProcessor();
},
//
// see nsIHttpResponse.seizePower
//
seizePower: function()
{
if (this._processAsync)
throw Cr.NS_ERROR_NOT_AVAILABLE;
if (this._finished)
throw Cr.NS_ERROR_UNEXPECTED;
if (this._powerSeized)
return;
this._ensureAlive();
dumpn("*** forcefully seizing power over connection " +
this._connection.number + "...");
// Purge any already-written data without sending it. We could as easily
// swap out the streams entirely, but that makes it possible to acquire and
// unknowingly use a stale reference, so we require there only be one of
// each stream ever for any response to avoid this complication.
if (this._asyncCopier)
this._asyncCopier.cancel(Cr.NS_BINDING_ABORTED);
this._asyncCopier = null;
if (this._bodyOutputStream)
{
var input = new BinaryInputStream(this._bodyInputStream);
var avail;
while ((avail = input.available()) > 0)
input.readByteArray(avail);
}
this._powerSeized = true;
if (this._bodyOutputStream)
this._startAsyncProcessor();
},
//
// see nsIHttpResponse.finish
//
finish: function()
{
if (!this._processAsync && !this._powerSeized)
throw Cr.NS_ERROR_UNEXPECTED;
if (this._finished)
return;
dumpn("*** finishing connection " + this._connection.number);
this._startAsyncProcessor(); // in case bodyOutputStream was never accessed
if (this._bodyOutputStream)
this._bodyOutputStream.close();
this._finished = true;
},
// NSISUPPORTS
//
// see nsISupports.QueryInterface
//
QueryInterface: function(iid)
{
if (iid.equals(Ci.nsIHttpResponse) || iid.equals(Ci.nsISupports))
return this;
throw Cr.NS_ERROR_NO_INTERFACE;
},
// POST-CONSTRUCTION API (not exposed externally)
/**
* The HTTP version number of this, as a string (e.g. "1.1").
*/
get httpVersion()
{
this._ensureAlive();
return this._httpVersion.toString();
},
/**
* The HTTP status code of this response, as a string of three characters per
* RFC 2616.
*/
get httpCode()
{
this._ensureAlive();
var codeString = (this._httpCode < 10 ? "0" : "") +
(this._httpCode < 100 ? "0" : "") +
this._httpCode;
return codeString;
},
/**
* The description of the HTTP status code of this response, or "" if none is
* set.
*/
get httpDescription()
{
this._ensureAlive();
return this._httpDescription;
},
/**
* The headers in this response, as an nsHttpHeaders object.
*/
get headers()
{
this._ensureAlive();
return this._headers;
},
//
// see nsHttpHeaders.getHeader
//
getHeader: function(name)
{
this._ensureAlive();
return this._headers.getHeader(name);
},
/**
* Determines whether this response may be abandoned in favor of a newly
* constructed response. A response may be abandoned only if it is not being
* sent asynchronously and if raw control over it has not been taken from the
* server.
*
* @returns boolean
* true iff no data has been written to the network
*/
partiallySent: function()
{
dumpn("*** partiallySent()");
return this._processAsync || this._powerSeized;
},
/**
* If necessary, kicks off the remaining request processing needed to be done
* after a request handler performs its initial work upon this response.
*/
complete: function()
{
dumpn("*** complete()");
if (this._processAsync || this._powerSeized)
{
NS_ASSERT(this._processAsync ^ this._powerSeized,
"can't both send async and relinquish power");
return;
}
NS_ASSERT(!this.partiallySent(), "completing a partially-sent response?");
this._startAsyncProcessor();
// Now make sure we finish processing this request!
if (this._bodyOutputStream)
this._bodyOutputStream.close();
},
/**
* Abruptly ends processing of this response, usually due to an error in an
* incoming request but potentially due to a bad error handler. Since we
* cannot handle the error in the usual way (giving an HTTP error page in
* response) because data may already have been sent (or because the response
* might be expected to have been generated asynchronously or completely from
* scratch by the handler), we stop processing this response and abruptly
* close the connection.
*
* @param e : Error
* the exception which precipitated this abort, or null if no such exception
* was generated
*/
abort: function(e)
{
dumpn("*** abort(<" + e + ">)");
// This response will be ended by the processor if one was created.
var copier = this._asyncCopier;
if (copier)
{
// We dispatch asynchronously here so that any pending writes of data to
// the connection will be deterministically written. This makes it easier
// to specify exact behavior, and it makes observable behavior more
// predictable for clients. Note that the correctness of this depends on
// callbacks in response to _waitForData in WriteThroughCopier happening
// asynchronously with respect to the actual writing of data to
// bodyOutputStream, as they currently do; if they happened synchronously,
// an event which ran before this one could write more data to the
// response body before we get around to canceling the copier. We have
// tests for this in test_seizepower.js, however, and I can't think of a
// way to handle both cases without removing bodyOutputStream access and
// moving its effective write(data, length) method onto Response, which
// would be slower and require more code than this anyway.
gThreadManager.currentThread.dispatch({
run: function()
{
dumpn("*** canceling copy asynchronously...");
copier.cancel(Cr.NS_ERROR_UNEXPECTED);
}
}, Ci.nsIThread.DISPATCH_NORMAL);
}
else
{
this.end();
}
},
/**
* Closes this response's network connection, marks the response as finished,
* and notifies the server handler that the request is done being processed.
*/
end: function()
{
NS_ASSERT(!this._ended, "ending this response twice?!?!");
this._connection.close();
if (this._bodyOutputStream)
this._bodyOutputStream.close();
this._finished = true;
this._ended = true;
},
// PRIVATE IMPLEMENTATION
/**
* Signals that all modifications to the response status line and headers are
* complete and then sends that data over the network to the client. Once
* this method completes, a different response to the request that resulted
* in this response cannot be sent -- the only possible action in case of
* error is to abort the response and close the connection.
*/
_sendHeaders: function()
{
dumpn("*** _sendHeaders()");
NS_ASSERT(this._headers);
NS_ASSERT(!this._powerSeized);
// request-line
var statusLine = "HTTP/" + this.httpVersion + " " +
this.httpCode + " " +
this.httpDescription + "\r\n";
// header post-processing
var headers = this._headers;
headers.setHeader("Connection", "close", false);
headers.setHeader("Server", "httpd.js", false);
if (!headers.hasHeader("Date"))
headers.setHeader("Date", toDateString(Date.now()), false);
// Any response not being processed asynchronously must have an associated
// Content-Length header for reasons of backwards compatibility with the
// initial server, which fully buffered every response before sending it.
// Beyond that, however, it's good to do this anyway because otherwise it's
// impossible to test behaviors that depend on the presence or absence of a
// Content-Length header.
if (!this._processAsync)
{
dumpn("*** non-async response, set Content-Length");
var bodyStream = this._bodyInputStream;
var avail = bodyStream ? bodyStream.available() : 0;
// XXX assumes stream will always report the full amount of data available
headers.setHeader("Content-Length", "" + avail, false);
}
// construct and send response
dumpn("*** header post-processing completed, sending response head...");
// request-line
var preamble = statusLine;
// headers
var headEnum = headers.enumerator;
while (headEnum.hasMoreElements())
{
var fieldName = headEnum.getNext()
.QueryInterface(Ci.nsISupportsString)
.data;
var values = headers.getHeaderValues(fieldName);
for (var i = 0, sz = values.length; i < sz; i++)
preamble += fieldName + ": " + values[i] + "\r\n";
}
// end request-line/headers
preamble += "\r\n";
var connection = this._connection;
try
{
connection.output.write(preamble, preamble.length);
}
catch (e)
{
// Connection closed already? Even if not, failure to write the response
// means we probably will fail later anyway, so in the interests of
// avoiding exceptions we'll (possibly) close the connection and return.
dumpn("*** error writing headers to socket: " + e);
response.end();
return;
}
// Forbid setting any more headers or modifying the request line.
this._headers = null;
},
/**
* Sends the status line and headers of this response if they haven't been
* sent and initiates the process of copying data written to this response's
* body to the network.
*/
_startAsyncProcessor: function()
{
dumpn("*** _startAsyncProcessor()");
// Handle cases where we're being called a second time. The former case
// happens when this is triggered both by complete() and by processAsync(),
// while the latter happens when processAsync() in conjunction with sent
// data causes abort() to be called.
if (this._asyncCopier || this._ended)
{
dumpn("*** ignoring second call to _startAsyncProcessor");
return;
}
// Send headers if they haven't been sent already.
if (this._headers)
{
if (this._powerSeized)
this._headers = null;
else
this._sendHeaders();
NS_ASSERT(this._headers === null, "_sendHeaders() failed?");
}
var response = this;
var connection = this._connection;
// If no body data was written, we're done
if (!this._bodyInputStream)
{
dumpn("*** empty body, response finished");
response.end();
return;
}
var copyObserver =
{
onStartRequest: function(request, context)
{
dumpn("*** onStartRequest");
},
onStopRequest: function(request, cx, statusCode)
{
dumpn("*** onStopRequest [status=0x" + statusCode.toString(16) + "]");
if (statusCode === Cr.NS_BINDING_ABORTED)
{
dumpn("*** terminating copy observer without ending the response");
}
else
{
if (!Components.isSuccessCode(statusCode))
dumpn("*** WARNING: non-success statusCode in onStopRequest");
response.end();
}
},
QueryInterface: function(aIID)
{
if (aIID.equals(Ci.nsIRequestObserver) ||
aIID.equals(Ci.nsISupports))
return this;
throw Cr.NS_ERROR_NO_INTERFACE;
}
};
dumpn("*** starting async copier of body data...");
var copier = this._asyncCopier =
new WriteThroughCopier(this._bodyInputStream, this._connection.output,
copyObserver, null);
},
/** Ensures that this hasn't been ended. */
_ensureAlive: function()
{
NS_ASSERT(!this._ended, "not handling response lifetime correctly");
}
};
/**
* Size of the segments in the buffer used in storing response data and writing
* it to the socket.
*/
Response.SEGMENT_SIZE = 8192;
/** Serves double duty in WriteThroughCopier implementation. */
function notImplemented()
{
throw Cr.NS_ERROR_NOT_IMPLEMENTED;
}
/**
* Copies data from input to output as it becomes available.
*
* @param input : nsIAsyncInputStream
* the stream from which data is to be read
* @param output : nsIOutputStream
* the stream to which data is to be copied
* @param observer : nsIRequestObserver
* an observer which will be notified when the copy starts and finishes
* @param context : nsISupports
* context passed to observer when notified of start/stop
* @throws NS_ERROR_NULL_POINTER
* if input, output, or observer are null
*/
function WriteThroughCopier(input, output, observer, context)
{
if (!input || !output || !observer)
throw Cr.NS_ERROR_NULL_POINTER;
/** Stream from which data is being read. */
this._input = input;
/** Stream to which data is being written. */
this._output = new BinaryOutputStream(output);
/** Observer watching this copy. */
this._observer = observer;
/** Context for the observer watching this. */
this._context = context;
/** False until cancel() is called, when this copy is completed. */
this._completed = false;
/** Required by nsIRequest, meaningless. */
this.loadFlags = 0;
/** Required by nsIRequest, meaningless. */
this.loadGroup = null;
/** Required by nsIRequest, meaningless. */
this.name = "response-body-copy";
/** Status of this request. */
this.status = Cr.NS_OK;
// start copying
try
{
observer.onStartRequest(this, context);
this._waitForData();
}
catch (e)
{
dumpn("!!! error starting copy: " + e);
this.cancel(Cr.NS_ERROR_UNEXPECTED);
}
}
WriteThroughCopier.prototype =
{
/**
* Cancels data copying and asynchronously notifies the observer with the
* given error code.
*
* @param status : nsresult
* the status to pass to the observer when data copying has been canceled
*/
cancel: function(status)
{
dumpn("*** cancel(" + status.toString(16) + ")");
if (this._completed)
{
dumpn("*** ignoring cancel on already-canceled copier...");
return;
}
this._completed = true;
this.status = status;
var self = this;
var cancelEvent =
{
run: function()
{
dumpn("*** onStopRequest async callback");
try
{
self._observer.onStopRequest(self, self._context, self.status);
}
catch (e)
{
NS_ASSERT(false, "how are we throwing an exception here? " + e);
}
}
};
gThreadManager.currentThread
.dispatch(cancelEvent, Ci.nsIThread.DISPATCH_NORMAL);
},
/**
* Returns true if the provided input hasn't been fully consumed and cancel()
* hasn't been called.
*/
isPending: function()
{
return !this._completed;
},
/** Not implemented, don't use! */
suspend: notImplemented,
/** Not implemented, don't use! */
resume: notImplemented,
/**
* Receives a more-data-in-input notification and writes the corresponding
* data to the output.
*/
onInputStreamReady: function(input)
{
dumpn("*** onInputStreamReady");
if (this._completed)
{
dumpn("*** ignoring stream-ready callback on a canceled copier...");
return;
}
input = new BinaryInputStream(input);
try
{
var avail = input.available();
var data = input.readByteArray(avail);
this._output.writeByteArray(data, data.length);
}
catch (e)
{
if (e === Cr.NS_BASE_STREAM_CLOSED ||
e.result === Cr.NS_BASE_STREAM_CLOSED)
{
this.cancel(Cr.NS_OK);
}
else
{
dumpn("!!! error copying from input to output: " + e);
this.cancel(Cr.NS_ERROR_UNEXPECTED);
}
return;
}
if (avail === 0)
this.cancel(Cr.NS_OK);
else
this._waitForData();
},
/**
* Kicks off another wait for more data to be available from the input stream.
*/
_waitForData: function()
{
dumpn("*** _waitForData");
this._input.asyncWait(this, 0, 1, gThreadManager.mainThread);
},
/** nsISupports implementation */
QueryInterface: function(iid)
{
if (iid.equals(Ci.nsIRequest) ||
iid.equals(Ci.nsISupports) ||
iid.equals(Ci.nsIInputStreamCallback))
{
return this;
}
throw Cr.NS_ERROR_NO_INTERFACE;
}
};
/**
* A container for utility functions used with HTTP headers.
*/
const headerUtils =
{
/**
* Normalizes fieldName (by converting it to lowercase) and ensures it is a
* valid header field name (although not necessarily one specified in RFC
* 2616).
*
* @throws NS_ERROR_INVALID_ARG
* if fieldName does not match the field-name production in RFC 2616
* @returns string
* fieldName converted to lowercase if it is a valid header, for characters
* where case conversion is possible
*/
normalizeFieldName: function(fieldName)
{
if (fieldName == "")
throw Cr.NS_ERROR_INVALID_ARG;
for (var i = 0, sz = fieldName.length; i < sz; i++)
{
if (!IS_TOKEN_ARRAY[fieldName.charCodeAt(i)])
{
dumpn(fieldName + " is not a valid header field name!");
throw Cr.NS_ERROR_INVALID_ARG;
}
}
return fieldName.toLowerCase();
},
/**
* Ensures that fieldValue is a valid header field value (although not
* necessarily as specified in RFC 2616 if the corresponding field name is
* part of the HTTP protocol), normalizes the value if it is, and
* returns the normalized value.
*
* @param fieldValue : string
* a value to be normalized as an HTTP header field value
* @throws NS_ERROR_INVALID_ARG
* if fieldValue does not match the field-value production in RFC 2616
* @returns string
* fieldValue as a normalized HTTP header field value
*/
normalizeFieldValue: function(fieldValue)
{
// field-value = *( field-content | LWS )
// field-content = <the OCTETs making up the field-value
// and consisting of either *TEXT or combinations
// of token, separators, and quoted-string>
// TEXT = <any OCTET except CTLs,
// but including LWS>
// LWS = [CRLF] 1*( SP | HT )
//
// quoted-string = ( <"> *(qdtext | quoted-pair ) <"> )
// qdtext = <any TEXT except <">>
// quoted-pair = "\" CHAR
// CHAR = <any US-ASCII character (octets 0 - 127)>
// Any LWS that occurs between field-content MAY be replaced with a single
// SP before interpreting the field value or forwarding the message
// downstream (section 4.2); we replace 1*LWS with a single SP
var val = fieldValue.replace(/(?:(?:\r\n)?[ \t]+)+/g, " ");
// remove leading/trailing LWS (which has been converted to SP)
val = val.replace(/^ +/, "").replace(/ +$/, "");
// that should have taken care of all CTLs, so val should contain no CTLs
for (var i = 0, len = val.length; i < len; i++)
if (isCTL(val.charCodeAt(i)))
throw Cr.NS_ERROR_INVALID_ARG;
// XXX disallows quoted-pair where CHAR is a CTL -- will not invalidly
// normalize, however, so this can be construed as a tightening of the
// spec and not entirely as a bug
return val;
}
};
/**
* Converts the given string into a string which is safe for use in an HTML
* context.
*
* @param str : string
* the string to make HTML-safe
* @returns string
* an HTML-safe version of str
*/
function htmlEscape(str)
{
// this is naive, but it'll work
var s = "";
for (var i = 0; i < str.length; i++)
s += "&#" + str.charCodeAt(i) + ";";
return s;
}
/**
* Constructs an object representing an HTTP version (see section 3.1).
*
* @param versionString
* a string of the form "#.#", where # is an non-negative decimal integer with
* or without leading zeros
* @throws
* if versionString does not specify a valid HTTP version number
*/
function nsHttpVersion(versionString)
{
var matches = /^(\d+)\.(\d+)$/.exec(versionString);
if (!matches)
throw "Not a valid HTTP version!";
/** The major version number of this, as a number. */
this.major = parseInt(matches[1], 10);
/** The minor version number of this, as a number. */
this.minor = parseInt(matches[2], 10);
if (isNaN(this.major) || isNaN(this.minor) ||
this.major < 0 || this.minor < 0)
throw "Not a valid HTTP version!";
}
nsHttpVersion.prototype =
{
/**
* Returns the standard string representation of the HTTP version represented
* by this (e.g., "1.1").
*/
toString: function ()
{
return this.major + "." + this.minor;
},
/**
* Returns true if this represents the same HTTP version as otherVersion,
* false otherwise.
*
* @param otherVersion : nsHttpVersion
* the version to compare against this
*/
equals: function (otherVersion)
{
return this.major == otherVersion.major &&
this.minor == otherVersion.minor;
},
/** True if this >= otherVersion, false otherwise. */
atLeast: function(otherVersion)
{
return this.major > otherVersion.major ||
(this.major == otherVersion.major &&
this.minor >= otherVersion.minor);
}
};
nsHttpVersion.HTTP_1_0 = new nsHttpVersion("1.0");
nsHttpVersion.HTTP_1_1 = new nsHttpVersion("1.1");
/**
* An object which stores HTTP headers for a request or response.
*
* Note that since headers are case-insensitive, this object converts headers to
* lowercase before storing them. This allows the getHeader and hasHeader
* methods to work correctly for any case of a header, but it means that the
* values returned by .enumerator may not be equal case-sensitively to the
* values passed to setHeader when adding headers to this.
*/
function nsHttpHeaders()
{
/**
* A hash of headers, with header field names as the keys and header field
* values as the values. Header field names are case-insensitive, but upon
* insertion here they are converted to lowercase. Header field values are
* normalized upon insertion to contain no leading or trailing whitespace.
*
* Note also that per RFC 2616, section 4.2, two headers with the same name in
* a message may be treated as one header with the same field name and a field
* value consisting of the separate field values joined together with a "," in
* their original order. This hash stores multiple headers with the same name
* in this manner.
*/
this._headers = {};
}
nsHttpHeaders.prototype =
{
/**
* Sets the header represented by name and value in this.
*
* @param name : string
* the header name
* @param value : string
* the header value
* @throws NS_ERROR_INVALID_ARG
* if name or value is not a valid header component
*/
setHeader: function(fieldName, fieldValue, merge)
{
var name = headerUtils.normalizeFieldName(fieldName);
var value = headerUtils.normalizeFieldValue(fieldValue);
// The following three headers are stored as arrays because their real-world
// syntax prevents joining individual headers into a single header using
// ",". See also <http://hg.mozilla.org/mozilla-central/diff/9b2a99adc05e/netwerk/protocol/http/src/nsHttpHeaderArray.cpp#l77>
if (merge && name in this._headers)
{
if (name === "www-authenticate" ||
name === "proxy-authenticate" ||
name === "set-cookie")
{
this._headers[name].push(value);
}
else
{
this._headers[name][0] += "," + value;
NS_ASSERT(this._headers[name].length === 1,
"how'd a non-special header have multiple values?")
}
}
else
{
this._headers[name] = [value];
}
},
/**
* Returns the value for the header specified by this.
*
* @throws NS_ERROR_INVALID_ARG
* if fieldName does not constitute a valid header field name
* @throws NS_ERROR_NOT_AVAILABLE
* if the given header does not exist in this
* @returns string
* the field value for the given header, possibly with non-semantic changes
* (i.e., leading/trailing whitespace stripped, whitespace runs replaced
* with spaces, etc.) at the option of the implementation; multiple
* instances of the header will be combined with a comma, except for
* the three headers noted in the description of getHeaderValues
*/
getHeader: function(fieldName)
{
return this.getHeaderValues(fieldName).join("\n");
},
/**
* Returns the value for the header specified by fieldName as an array.
*
* @throws NS_ERROR_INVALID_ARG
* if fieldName does not constitute a valid header field name
* @throws NS_ERROR_NOT_AVAILABLE
* if the given header does not exist in this
* @returns [string]
* an array of all the header values in this for the given
* header name. Header values will generally be collapsed
* into a single header by joining all header values together
* with commas, but certain headers (Proxy-Authenticate,
* WWW-Authenticate, and Set-Cookie) violate the HTTP spec
* and cannot be collapsed in this manner. For these headers
* only, the returned array may contain multiple elements if
* that header has been added more than once.
*/
getHeaderValues: function(fieldName)
{
var name = headerUtils.normalizeFieldName(fieldName);
if (name in this._headers)
return this._headers[name];
else
throw Cr.NS_ERROR_NOT_AVAILABLE;
},
/**
* Returns true if a header with the given field name exists in this, false
* otherwise.
*
* @param fieldName : string
* the field name whose existence is to be determined in this
* @throws NS_ERROR_INVALID_ARG
* if fieldName does not constitute a valid header field name
* @returns boolean
* true if the header's present, false otherwise
*/
hasHeader: function(fieldName)
{
var name = headerUtils.normalizeFieldName(fieldName);
return (name in this._headers);
},
/**
* Returns a new enumerator over the field names of the headers in this, as
* nsISupportsStrings. The names returned will be in lowercase, regardless of
* how they were input using setHeader (header names are case-insensitive per
* RFC 2616).
*/
get enumerator()
{
var headers = [];
for (var i in this._headers)
{
var supports = new SupportsString();
supports.data = i;
headers.push(supports);
}
return new nsSimpleEnumerator(headers);
}
};
/**
* Constructs an nsISimpleEnumerator for the given array of items.
*
* @param items : Array
* the items, which must all implement nsISupports
*/
function nsSimpleEnumerator(items)
{
this._items = items;
this._nextIndex = 0;
}
nsSimpleEnumerator.prototype =
{
hasMoreElements: function()
{
return this._nextIndex < this._items.length;
},
getNext: function()
{
if (!this.hasMoreElements())
throw Cr.NS_ERROR_NOT_AVAILABLE;
return this._items[this._nextIndex++];
},
QueryInterface: function(aIID)
{
if (Ci.nsISimpleEnumerator.equals(aIID) ||
Ci.nsISupports.equals(aIID))
return this;
throw Cr.NS_ERROR_NO_INTERFACE;
}
};
/**
* A representation of the data in an HTTP request.
*
* @param port : uint
* the port on which the server receiving this request runs
*/
function Request(port)
{
/** Method of this request, e.g. GET or POST. */
this._method = "";
/** Path of the requested resource; empty paths are converted to '/'. */
this._path = "";
/** Query string, if any, associated with this request (not including '?'). */
this._queryString = "";
/** Scheme of requested resource, usually http, always lowercase. */
this._scheme = "http";
/** Hostname on which the requested resource resides. */
this._host = undefined;
/** Port number over which the request was received. */
this._port = port;
var bodyPipe = new Pipe(false, false, 0, PR_UINT32_MAX, null);
/** Stream from which data in this request's body may be read. */
this._bodyInputStream = bodyPipe.inputStream;
/** Stream to which data in this request's body is written. */
this._bodyOutputStream = bodyPipe.outputStream;
/**
* The headers in this request.
*/
this._headers = new nsHttpHeaders();
/**
* For the addition of ad-hoc properties and new functionality without having
* to change nsIHttpRequest every time; currently lazily created, as its only
* use is in directory listings.
*/
this._bag = null;
}
Request.prototype =
{
// SERVER METADATA
//
// see nsIHttpRequest.scheme
//
get scheme()
{
return this._scheme;
},
//
// see nsIHttpRequest.host
//
get host()
{
return this._host;
},
//
// see nsIHttpRequest.port
//
get port()
{
return this._port;
},
// REQUEST LINE
//
// see nsIHttpRequest.method
//
get method()
{
return this._method;
},
//
// see nsIHttpRequest.httpVersion
//
get httpVersion()
{
return this._httpVersion.toString();
},
//
// see nsIHttpRequest.path
//
get path()
{
return this._path;
},
//
// see nsIHttpRequest.queryString
//
get queryString()
{
return this._queryString;
},
// HEADERS
//
// see nsIHttpRequest.getHeader
//
getHeader: function(name)
{
return this._headers.getHeader(name);
},
//
// see nsIHttpRequest.hasHeader
//
hasHeader: function(name)
{
return this._headers.hasHeader(name);
},
//
// see nsIHttpRequest.headers
//
get headers()
{
return this._headers.enumerator;
},
//
// see nsIPropertyBag.enumerator
//
get enumerator()
{
this._ensurePropertyBag();
return this._bag.enumerator;
},
//
// see nsIHttpRequest.headers
//
get bodyInputStream()
{
return this._bodyInputStream;
},
//
// see nsIPropertyBag.getProperty
//
getProperty: function(name)
{
this._ensurePropertyBag();
return this._bag.getProperty(name);
},
// NSISUPPORTS
//
// see nsISupports.QueryInterface
//
QueryInterface: function(iid)
{
if (iid.equals(Ci.nsIHttpRequest) || iid.equals(Ci.nsISupports))
return this;
throw Cr.NS_ERROR_NO_INTERFACE;
},
// PRIVATE IMPLEMENTATION
/** Ensures a property bag has been created for ad-hoc behaviors. */
_ensurePropertyBag: function()
{
if (!this._bag)
this._bag = new WritablePropertyBag();
}
};
// XPCOM trappings
/**
* Creates a factory for instances of an object created using the passed-in
* constructor.
*/
function makeFactory(ctor)
{
function ci(outer, iid)
{
if (outer != null)
throw Components.results.NS_ERROR_NO_AGGREGATION;
return (new ctor()).QueryInterface(iid);
}
return {
createInstance: ci,
lockFactory: function(lock) { },
QueryInterface: function(aIID)
{
if (Ci.nsIFactory.equals(aIID) ||
Ci.nsISupports.equals(aIID))
return this;
throw Cr.NS_ERROR_NO_INTERFACE;
}
};
}
/** The XPCOM module containing the HTTP server. */
const module =
{
// nsISupports
QueryInterface: function(aIID)
{
if (Ci.nsIModule.equals(aIID) ||
Ci.nsISupports.equals(aIID))
return this;
throw Cr.NS_ERROR_NO_INTERFACE;
},
// nsIModule
registerSelf: function(compMgr, fileSpec, location, type)
{
compMgr = compMgr.QueryInterface(Ci.nsIComponentRegistrar);
for (var key in this._objects)
{
var obj = this._objects[key];
compMgr.registerFactoryLocation(obj.CID, obj.className, obj.contractID,
fileSpec, location, type);
}
},
unregisterSelf: function (compMgr, location, type)
{
compMgr = compMgr.QueryInterface(Ci.nsIComponentRegistrar);
for (var key in this._objects)
{
var obj = this._objects[key];
compMgr.unregisterFactoryLocation(obj.CID, location);
}
},
getClassObject: function(compMgr, cid, iid)
{
if (!iid.equals(Ci.nsIFactory))
throw Cr.NS_ERROR_NOT_IMPLEMENTED;
for (var key in this._objects)
{
if (cid.equals(this._objects[key].CID))
return this._objects[key].factory;
}
throw Cr.NS_ERROR_NO_INTERFACE;
},
canUnload: function(compMgr)
{
return true;
},
// private implementation
_objects:
{
server:
{
CID: Components.ID("{54ef6f81-30af-4b1d-ac55-8ba811293e41}"),
contractID: "@mozilla.org/server/jshttp;1",
className: "httpd.js server",
factory: makeFactory(nsHttpServer)
}
}
};
/** NSGetModule, so this code can be used as a JS component. */
function NSGetModule(compMgr, fileSpec)
{
return module;
}
/**
* Creates a new HTTP server listening for loopback traffic on the given port,
* starts it, and runs the server until the server processes a shutdown request,
* spinning an event loop so that events posted by the server's socket are
* processed.
*
* This method is primarily intended for use in running this script from within
* xpcshell and running a functional HTTP server without having to deal with
* non-essential details.
*
* Note that running multiple servers using variants of this method probably
* doesn't work, simply due to how the internal event loop is spun and stopped.
*
* @note
* This method only works with Mozilla 1.9 (i.e., Firefox 3 or trunk code);
* you should use this server as a component in Mozilla 1.8.
* @param port
* the port on which the server will run, or -1 if there exists no preference
* for a specific port; note that attempting to use some values for this
* parameter (particularly those below 1024) may cause this method to throw or
* may result in the server being prematurely shut down
* @param basePath
* a local directory from which requests will be served (i.e., if this is
* "/home/jwalden/" then a request to /index.html will load
* /home/jwalden/index.html); if this is omitted, only the default URLs in
* this server implementation will be functional
*/
function server(port, basePath)
{
if (basePath)
{
var lp = Cc["@mozilla.org/file/local;1"]
.createInstance(Ci.nsILocalFile);
lp.initWithPath(basePath);
}
// if you're running this, you probably want to see debugging info
DEBUG = true;
var srv = new nsHttpServer();
if (lp)
srv.registerDirectory("/", lp);
srv.registerContentType("sjs", SJS_TYPE);
srv.identity.setPrimary("http", "localhost", port);
srv.start(port);
var thread = gThreadManager.currentThread;
while (!srv.isStopped())
thread.processNextEvent(true);
// get rid of any pending requests
while (thread.hasPendingEvents())
thread.processNextEvent(true);
DEBUG = false;
}
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