gecko/netwerk/protocol/http/nsHttp.h
Patrick McManus 8aeeee04ac bug 716871 remove nshttp::CLAMP r=jduell
--HG--
extra : rebase_source : 52fb3f75e30bb1e329c2e3cfe2ef6e758adb5b60
2012-01-10 20:07:29 -05:00

244 lines
8.9 KiB
C

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim:set ts=4 sw=4 sts=4 et cin: */
/* ***** 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 Mozilla.
*
* The Initial Developer of the Original Code is
* Netscape Communications.
* Portions created by the Initial Developer are Copyright (C) 2001
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Darin Fisher <darin@netscape.com> (original author)
*
* 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 ***** */
#ifndef nsHttp_h__
#define nsHttp_h__
#if defined(MOZ_LOGGING)
#define FORCE_PR_LOG
#endif
// e10s mess: IPDL-generatd headers include chromium which both #includes
// prlog.h, and #defines LOG in conflict with this file.
// Solution: (as described in bug 545995)
// 1) ensure that this file is #included before any IPDL-generated files and
// anything else that #includes prlog.h, so that we can make sure prlog.h
// sees FORCE_PR_LOG if needed.
// 2) #include IPDL boilerplate, and then undef LOG so our LOG wins.
// 3) nsNetModule.cpp does its own crazy stuff with #including prlog.h
// multiple times; allow it to define ALLOW_LATE_NSHTTP_H_INCLUDE to bypass
// check.
#if defined(PR_LOG) && !defined(ALLOW_LATE_NSHTTP_H_INCLUDE)
#error "If nsHttp.h #included it must come before any IPDL-generated files or other files that #include prlog.h"
#endif
#include "mozilla/net/NeckoChild.h"
#undef LOG
#include "plstr.h"
#include "prlog.h"
#include "prtime.h"
#include "nsISupportsUtils.h"
#include "nsPromiseFlatString.h"
#include "nsURLHelper.h"
#include "netCore.h"
#if defined(PR_LOGGING)
//
// Log module for HTTP Protocol logging...
//
// To enable logging (see prlog.h for full details):
//
// set NSPR_LOG_MODULES=nsHttp:5
// set NSPR_LOG_FILE=http.log
//
// this enables PR_LOG_ALWAYS level information and places all output in
// the file http.log
//
extern PRLogModuleInfo *gHttpLog;
#endif
// http logging
#define LOG1(args) PR_LOG(gHttpLog, 1, args)
#define LOG2(args) PR_LOG(gHttpLog, 2, args)
#define LOG3(args) PR_LOG(gHttpLog, 3, args)
#define LOG4(args) PR_LOG(gHttpLog, 4, args)
#define LOG(args) LOG4(args)
#define LOG1_ENABLED() PR_LOG_TEST(gHttpLog, 1)
#define LOG2_ENABLED() PR_LOG_TEST(gHttpLog, 2)
#define LOG3_ENABLED() PR_LOG_TEST(gHttpLog, 3)
#define LOG4_ENABLED() PR_LOG_TEST(gHttpLog, 4)
#define LOG_ENABLED() LOG4_ENABLED()
// http version codes
#define NS_HTTP_VERSION_UNKNOWN 0
#define NS_HTTP_VERSION_0_9 9
#define NS_HTTP_VERSION_1_0 10
#define NS_HTTP_VERSION_1_1 11
typedef PRUint8 nsHttpVersion;
//-----------------------------------------------------------------------------
// http connection capabilities
//-----------------------------------------------------------------------------
#define NS_HTTP_ALLOW_KEEPALIVE (1<<0)
#define NS_HTTP_ALLOW_PIPELINING (1<<1)
// a transaction with this caps flag will continue to own the connection,
// preventing it from being reclaimed, even after the transaction completes.
#define NS_HTTP_STICKY_CONNECTION (1<<2)
// a transaction with this caps flag will, upon opening a new connection,
// bypass the local DNS cache
#define NS_HTTP_REFRESH_DNS (1<<3)
// a transaction with this caps flag will not pass SSL client-certificates
// to the server (see bug #466080), but is may also be used for other things
#define NS_HTTP_LOAD_ANONYMOUS (1<<4)
// a transaction with this caps flag keeps timing information
#define NS_HTTP_TIMING_ENABLED (1<<5)
// a transaction with this caps flag will not only not use an existing
// persistent connection but it will close outstanding ones to the same
// host. Used by a forced reload to reset the connection states.
#define NS_HTTP_CLEAR_KEEPALIVES (1<<6)
// Disallow the use of the SPDY protocol. This is meant for the contexts
// such as HTTP upgrade which are nonsensical for SPDY, it is not the
// SPDY configuration variable.
#define NS_HTTP_DISALLOW_SPDY (1<<7)
//-----------------------------------------------------------------------------
// some default values
//-----------------------------------------------------------------------------
// hard upper limit on the number of requests that can be pipelined
#define NS_HTTP_MAX_PIPELINED_REQUESTS 8
#define NS_HTTP_DEFAULT_PORT 80
#define NS_HTTPS_DEFAULT_PORT 443
#define NS_HTTP_HEADER_SEPS ", \t"
//-----------------------------------------------------------------------------
// http atoms...
//-----------------------------------------------------------------------------
struct nsHttpAtom
{
operator const char *() const { return _val; }
const char *get() const { return _val; }
void operator=(const char *v) { _val = v; }
void operator=(const nsHttpAtom &a) { _val = a._val; }
// private
const char *_val;
};
struct nsHttp
{
static nsresult CreateAtomTable();
static void DestroyAtomTable();
// will dynamically add atoms to the table if they don't already exist
static nsHttpAtom ResolveAtom(const char *);
static nsHttpAtom ResolveAtom(const nsACString &s)
{
return ResolveAtom(PromiseFlatCString(s).get());
}
// returns true if the specified token [start,end) is valid per RFC 2616
// section 2.2
static bool IsValidToken(const char *start, const char *end);
static inline bool IsValidToken(const nsCString &s) {
const char *start = s.get();
return IsValidToken(start, start + s.Length());
}
// find the first instance (case-insensitive comparison) of the given
// |token| in the |input| string. the |token| is bounded by elements of
// |separators| and may appear at the beginning or end of the |input|
// string. null is returned if the |token| is not found. |input| may be
// null, in which case null is returned.
static const char *FindToken(const char *input, const char *token,
const char *separators);
// This function parses a string containing a decimal-valued, non-negative
// 64-bit integer. If the value would exceed LL_MAXINT, then false is
// returned. Otherwise, this function returns true and stores the
// parsed value in |result|. The next unparsed character in |input| is
// optionally returned via |next| if |next| is non-null.
//
// TODO(darin): Replace this with something generic.
//
static bool ParseInt64(const char *input, const char **next,
PRInt64 *result);
// Variant on ParseInt64 that expects the input string to contain nothing
// more than the value being parsed.
static inline bool ParseInt64(const char *input, PRInt64 *result) {
const char *next;
return ParseInt64(input, &next, result) && *next == '\0';
}
// Declare all atoms
//
// The atom names and values are stored in nsHttpAtomList.h and are brought
// to you by the magic of C preprocessing. Add new atoms to nsHttpAtomList
// and all support logic will be auto-generated.
//
#define HTTP_ATOM(_name, _value) static nsHttpAtom _name;
#include "nsHttpAtomList.h"
#undef HTTP_ATOM
};
//-----------------------------------------------------------------------------
// utilities...
//-----------------------------------------------------------------------------
static inline PRUint32
PRTimeToSeconds(PRTime t_usec)
{
return PRUint32( t_usec / PR_USEC_PER_SEC );
}
#define NowInSeconds() PRTimeToSeconds(PR_Now())
// round q-value to one decimal place; return most significant digit as uint.
#define QVAL_TO_UINT(q) ((unsigned int) ((q + 0.05) * 10.0))
#define HTTP_LWS " \t"
#define HTTP_HEADER_VALUE_SEPS HTTP_LWS ","
#endif // nsHttp_h__