gecko/browser/devtools/shared/AppCacheUtils.jsm

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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/**
* validateManifest() warns of the following errors:
* - No manifest specified in page
* - Manifest is not utf-8
* - Manifest mimetype not text/cache-manifest
* - Manifest does not begin with "CACHE MANIFEST"
* - Page modified since appcache last changed
* - Duplicate entries
* - Conflicting entries e.g. in both CACHE and NETWORK sections or in cache
* but blocked by FALLBACK namespace
* - Detect referenced files that are not available
* - Detect referenced files that have cache-control set to no-store
* - Wildcards used in a section other than NETWORK
* - Spaces in URI not replaced with %20
* - Completely invalid URIs
* - Too many dot dot slash operators
* - SETTINGS section is valid
* - Invalid section name
* - etc.
*/
"use strict";
const { classes: Cc, interfaces: Ci, utils: Cu } = Components;
let { XPCOMUtils } = Cu.import("resource://gre/modules/XPCOMUtils.jsm", {});
let { Services } = Cu.import("resource://gre/modules/Services.jsm", {});
let { Promise: promise } = Cu.import("resource://gre/modules/commonjs/sdk/core/promise.js", {});
this.EXPORTED_SYMBOLS = ["AppCacheUtils"];
function AppCacheUtils(documentOrUri) {
this._parseManifest = this._parseManifest.bind(this);
if (documentOrUri) {
if (typeof documentOrUri == "string") {
this.uri = documentOrUri;
}
if (/HTMLDocument/.test(documentOrUri.toString())) {
this.doc = documentOrUri;
}
}
}
AppCacheUtils.prototype = {
get cachePath() {
return "";
},
validateManifest: function ACU_validateManifest() {
let deferred = promise.defer();
this.errors = [];
// Check for missing manifest.
this._getManifestURI().then(manifestURI => {
this.manifestURI = manifestURI;
if (!this.manifestURI) {
this._addError(0, "noManifest");
deferred.resolve(this.errors);
}
this._getURIInfo(this.manifestURI).then(uriInfo => {
this._parseManifest(uriInfo).then(() => {
// Sort errors by line number.
this.errors.sort(function(a, b) {
return a.line - b.line;
});
deferred.resolve(this.errors);
});
});
});
return deferred.promise;
},
_parseManifest: function ACU__parseManifest(uriInfo) {
let deferred = promise.defer();
let manifestName = uriInfo.name;
let manifestLastModified = new Date(uriInfo.responseHeaders["Last-Modified"]);
if (uriInfo.charset.toLowerCase() != "utf-8") {
this._addError(0, "notUTF8", uriInfo.charset);
}
if (uriInfo.mimeType != "text/cache-manifest") {
this._addError(0, "badMimeType", uriInfo.mimeType);
}
let parser = new ManifestParser(uriInfo.text, this.manifestURI);
let parsed = parser.parse();
if (parsed.errors.length > 0) {
this.errors.push.apply(this.errors, parsed.errors);
}
// Check for duplicate entries.
let dupes = {};
for (let parsedUri of parsed.uris) {
dupes[parsedUri.uri] = dupes[parsedUri.uri] || [];
dupes[parsedUri.uri].push({
line: parsedUri.line,
section: parsedUri.section,
original: parsedUri.original
});
}
for (let [uri, value] of Iterator(dupes)) {
if (value.length > 1) {
this._addError(0, "duplicateURI", uri, JSON.stringify(value));
}
}
// Loop through network entries making sure that fallback and cache don't
// contain uris starting with the network uri.
for (let neturi of parsed.uris) {
if (neturi.section == "NETWORK") {
for (let parsedUri of parsed.uris) {
if (parsedUri.uri.startsWith(neturi.uri)) {
this._addError(neturi.line, "networkBlocksURI", neturi.line,
neturi.original, parsedUri.line, parsedUri.original,
parsedUri.section);
}
}
}
}
// Loop through fallback entries making sure that fallback and cache don't
// contain uris starting with the network uri.
for (let fb of parsed.fallbacks) {
for (let parsedUri of parsed.uris) {
if (parsedUri.uri.startsWith(fb.namespace)) {
this._addError(fb.line, "fallbackBlocksURI", fb.line,
fb.original, parsedUri.line, parsedUri.original,
parsedUri.section);
}
}
}
// Check that all resources exist and that their cach-control headers are
// not set to no-store.
let current = -1;
for (let i = 0, len = parsed.uris.length; i < len; i++) {
let parsedUri = parsed.uris[i];
this._getURIInfo(parsedUri.uri).then(uriInfo => {
current++;
if (uriInfo.success) {
// Check that the resource was not modified after the manifest was last
// modified. If it was then the manifest file should be refreshed.
let resourceLastModified =
new Date(uriInfo.responseHeaders["Last-Modified"]);
if (manifestLastModified < resourceLastModified) {
this._addError(parsedUri.line, "fileChangedButNotManifest",
uriInfo.name, manifestName, parsedUri.line);
}
// If cache-control: no-store the file will not be added to the
// appCache.
if (uriInfo.nocache) {
this._addError(parsedUri.line, "cacheControlNoStore",
parsedUri.original, parsedUri.line);
}
} else {
this._addError(parsedUri.line, "notAvailable",
parsedUri.original, parsedUri.line);
}
if (current == len - 1) {
deferred.resolve();
}
});
}
return deferred.promise;
},
_getURIInfo: function ACU__getURIInfo(uri) {
let inputStream = Cc["@mozilla.org/scriptableinputstream;1"]
.createInstance(Ci.nsIScriptableInputStream);
let deferred = promise.defer();
let channelCharset = "";
let buffer = "";
let channel = Services.io.newChannel(uri, null, null);
// Avoid the cache:
channel.loadFlags |= Ci.nsIRequest.LOAD_BYPASS_CACHE;
channel.loadFlags |= Ci.nsIRequest.INHIBIT_CACHING;
channel.asyncOpen({
onStartRequest: function (request, context) {
// This empty method is needed in order for onDataAvailable to be
// called.
},
onDataAvailable: function (request, context, stream, offset, count) {
request.QueryInterface(Ci.nsIHttpChannel);
inputStream.init(stream);
buffer = buffer.concat(inputStream.read(count));
},
onStopRequest: function onStartRequest(request, context, statusCode) {
if (statusCode == 0) {
request.QueryInterface(Ci.nsIHttpChannel);
let result = {
name: request.name,
success: request.requestSucceeded,
status: request.responseStatus + " - " + request.responseStatusText,
charset: request.contentCharset || "utf-8",
mimeType: request.contentType,
contentLength: request.contentLength,
nocache: request.isNoCacheResponse() || request.isNoStoreResponse(),
prePath: request.URI.prePath + "/",
text: buffer
};
result.requestHeaders = {};
request.visitRequestHeaders(function(header, value) {
result.requestHeaders[header] = value;
});
result.responseHeaders = {};
request.visitResponseHeaders(function(header, value) {
result.responseHeaders[header] = value;
});
deferred.resolve(result);
} else {
deferred.resolve({
name: request.name,
success: false
});
}
}
}, null);
return deferred.promise;
},
listEntries: function ACU_show(searchTerm) {
if (!Services.prefs.getBoolPref("browser.cache.disk.enable")) {
throw new Error(l10n.GetStringFromName("cacheDisabled"));
}
let entries = [];
Services.cache.visitEntries({
visitDevice: function(deviceID, deviceInfo) {
return true;
},
visitEntry: function(deviceID, entryInfo) {
if (entryInfo.deviceID == "offline") {
let entry = {};
let lowerKey = entryInfo.key.toLowerCase();
if (searchTerm && lowerKey.indexOf(searchTerm.toLowerCase()) == -1) {
return true;
}
for (let [key, value] of Iterator(entryInfo)) {
if (key == "QueryInterface") {
continue;
}
if (key == "clientID") {
entry.key = entryInfo.key;
}
if (key == "expirationTime" || key == "lastFetched" || key == "lastModified") {
value = new Date(value * 1000);
}
entry[key] = value;
}
entries.push(entry);
}
return true;
}
});
if (entries.length == 0) {
throw new Error(l10n.GetStringFromName("noResults"));
}
return entries;
},
viewEntry: function ACU_viewEntry(key) {
let uri;
Services.cache.visitEntries({
visitDevice: function(deviceID, deviceInfo) {
return true;
},
visitEntry: function(deviceID, entryInfo) {
if (entryInfo.deviceID == "offline" && entryInfo.key == key) {
uri = "about:cache-entry?client=" + entryInfo.clientID +
"&sb=1&key=" + entryInfo.key;
return false;
}
return true;
}
});
if (uri) {
let wm = Cc["@mozilla.org/appshell/window-mediator;1"]
.getService(Ci.nsIWindowMediator);
let win = wm.getMostRecentWindow("navigator:browser");
win.gBrowser.selectedTab = win.gBrowser.addTab(uri);
} else {
return l10n.GetStringFromName("entryNotFound");
}
},
clearAll: function ACU_clearAll() {
Services.cache.evictEntries(Ci.nsICache.STORE_OFFLINE);
},
_getManifestURI: function ACU__getManifestURI() {
let deferred = promise.defer();
let getURI = node => {
let htmlNode = this.doc.querySelector("html[manifest]");
if (htmlNode) {
let pageUri = this.doc.location ? this.doc.location.href : this.uri;
let origin = pageUri.substr(0, pageUri.lastIndexOf("/") + 1);
return origin + htmlNode.getAttribute("manifest");
}
};
if (this.doc) {
let uri = getURI(this.doc);
return promise.resolve(uri);
} else {
this._getURIInfo(this.uri).then(uriInfo => {
if (uriInfo.success) {
let html = uriInfo.text;
let parser = _DOMParser;
this.doc = parser.parseFromString(html, "text/html");
let uri = getURI(this.doc);
deferred.resolve(uri);
} else {
this.errors.push({
line: 0,
msg: l10n.GetStringFromName("invalidURI")
});
}
});
}
return deferred.promise;
},
_addError: function ACU__addError(line, l10nString, ...params) {
let msg;
if (params) {
msg = l10n.formatStringFromName(l10nString, params, params.length);
} else {
msg = l10n.GetStringFromName(l10nString);
}
this.errors.push({
line: line,
msg: msg
});
},
};
/**
* We use our own custom parser because we need far more detailed information
* than the system manifest parser provides.
*
* @param {String} manifestText
* The text content of the manifest file.
* @param {String} manifestURI
* The URI of the manifest file. This is used in calculating the path of
* relative URIs.
*/
function ManifestParser(manifestText, manifestURI) {
this.manifestText = manifestText;
this.origin = manifestURI.substr(0, manifestURI.lastIndexOf("/") + 1)
.replace(" ", "%20");
}
ManifestParser.prototype = {
parse: function OCIMP_parse() {
let lines = this.manifestText.split(/\r?\n/);
let fallbacks = this.fallbacks = [];
let settings = this.settings = [];
let errors = this.errors = [];
let uris = this.uris = [];
this.currSection = "CACHE";
for (let i = 0; i < lines.length; i++) {
let text = this.text = lines[i].replace(/^\s+|\s+$/g);
this.currentLine = i + 1;
if (i == 0 && text != "CACHE MANIFEST") {
this._addError(1, "firstLineMustBeCacheManifest", 1);
}
// Ignore comments
if (/^#/.test(text) || !text.length) {
continue;
}
if (text == "CACHE MANIFEST") {
if (this.currentLine != 1) {
this._addError(this.currentLine, "cacheManifestOnlyFirstLine2",
this.currentLine);
}
continue;
}
if (this._maybeUpdateSectionName()) {
continue;
}
switch (this.currSection) {
case "CACHE":
case "NETWORK":
this.parseLine();
break;
case "FALLBACK":
this.parseFallbackLine();
break;
case "SETTINGS":
this.parseSettingsLine();
break;
}
}
return {
uris: uris,
fallbacks: fallbacks,
settings: settings,
errors: errors
};
},
parseLine: function OCIMP_parseLine() {
let text = this.text;
if (text.indexOf("*") != -1) {
if (this.currSection != "NETWORK" || text.length != 1) {
this._addError(this.currentLine, "asteriskInWrongSection2",
this.currSection, this.currentLine);
return;
}
}
if (/\s/.test(text)) {
this._addError(this.currentLine, "escapeSpaces", this.currentLine);
text = text.replace(/\s/g, "%20")
}
if (text[0] == "/") {
if (text.substr(0, 4) == "/../") {
this._addError(this.currentLine, "slashDotDotSlashBad", this.currentLine);
} else {
this.uris.push(this._wrapURI(this.origin + text.substring(1)));
}
} else if (text.substr(0, 2) == "./") {
this.uris.push(this._wrapURI(this.origin + text.substring(2)));
} else if (text.substr(0, 4) == "http") {
this.uris.push(this._wrapURI(text));
} else {
let origin = this.origin;
let path = text;
while (path.substr(0, 3) == "../" && /^https?:\/\/.*?\/.*?\//.test(origin)) {
let trimIdx = origin.substr(0, origin.length - 1).lastIndexOf("/") + 1;
origin = origin.substr(0, trimIdx);
path = path.substr(3);
}
if (path.substr(0, 3) == "../") {
this._addError(this.currentLine, "tooManyDotDotSlashes", this.currentLine);
return;
}
if (/^https?:\/\//.test(path)) {
this.uris.push(this._wrapURI(path));
return;
}
this.uris.push(this._wrapURI(origin + path));
}
},
parseFallbackLine: function OCIMP_parseFallbackLine() {
let split = this.text.split(/\s+/);
let origURI = this.text;
if (split.length != 2) {
this._addError(this.currentLine, "fallbackUseSpaces", this.currentLine);
return;
}
let [ namespace, fallback ] = split;
if (namespace.indexOf("*") != -1) {
this._addError(this.currentLine, "fallbackAsterisk2", this.currentLine);
}
if (/\s/.test(namespace)) {
this._addError(this.currentLine, "escapeSpaces", this.currentLine);
namespace = namespace.replace(/\s/g, "%20")
}
if (namespace.substr(0, 4) == "/../") {
this._addError(this.currentLine, "slashDotDotSlashBad", this.currentLine);
}
if (namespace.substr(0, 2) == "./") {
namespace = this.origin + namespace.substring(2);
}
if (namespace.substr(0, 4) != "http") {
let origin = this.origin;
let path = namespace;
while (path.substr(0, 3) == "../" && /^https?:\/\/.*?\/.*?\//.test(origin)) {
let trimIdx = origin.substr(0, origin.length - 1).lastIndexOf("/") + 1;
origin = origin.substr(0, trimIdx);
path = path.substr(3);
}
if (path.substr(0, 3) == "../") {
this._addError(this.currentLine, "tooManyDotDotSlashes", this.currentLine);
}
if (/^https?:\/\//.test(path)) {
namespace = path;
} else {
if (path[0] == "/") {
path = path.substring(1);
}
namespace = origin + path;
}
}
this.text = fallback;
this.parseLine();
this.fallbacks.push({
line: this.currentLine,
original: origURI,
namespace: namespace,
fallback: fallback
});
},
parseSettingsLine: function OCIMP_parseSettingsLine() {
let text = this.text;
if (this.settings.length == 1 || !/prefer-online|fast/.test(text)) {
this._addError(this.currentLine, "settingsBadValue", this.currentLine);
return;
}
switch (text) {
case "prefer-online":
this.settings.push(this._wrapURI(text));
break;
case "fast":
this.settings.push(this._wrapURI(text));
break;
}
},
_wrapURI: function OCIMP__wrapURI(uri) {
return {
section: this.currSection,
line: this.currentLine,
uri: uri,
original: this.text
};
},
_addError: function OCIMP__addError(line, l10nString, ...params) {
let msg;
if (params) {
msg = l10n.formatStringFromName(l10nString, params, params.length);
} else {
msg = l10n.GetStringFromName(l10nString);
}
this.errors.push({
line: line,
msg: msg
});
},
_maybeUpdateSectionName: function OCIMP__maybeUpdateSectionName() {
let text = this.text;
if (text == text.toUpperCase() && text.charAt(text.length - 1) == ":") {
text = text.substr(0, text.length - 1);
switch (text) {
case "CACHE":
case "NETWORK":
case "FALLBACK":
case "SETTINGS":
this.currSection = text;
return true;
default:
this._addError(this.currentLine,
"invalidSectionName", text, this.currentLine);
return false;
}
}
},
};
XPCOMUtils.defineLazyGetter(this, "l10n", function() Services.strings
.createBundle("chrome://browser/locale/devtools/appcacheutils.properties"));
XPCOMUtils.defineLazyGetter(this, "appcacheservice", function() {
return Cc["@mozilla.org/network/application-cache-service;1"]
.getService(Ci.nsIApplicationCacheService);
});
XPCOMUtils.defineLazyGetter(this, "_DOMParser", function() {
return Cc["@mozilla.org/xmlextras/domparser;1"].createInstance(Ci.nsIDOMParser);
});