diff options
Diffstat (limited to 'data/extensions/jid1-KtlZuoiikVfFew@jetpack/resources/librejs/lib/http_observer/process_response.js')
| -rw-r--r-- | data/extensions/jid1-KtlZuoiikVfFew@jetpack/resources/librejs/lib/http_observer/process_response.js | 420 |
1 files changed, 0 insertions, 420 deletions
diff --git a/data/extensions/jid1-KtlZuoiikVfFew@jetpack/resources/librejs/lib/http_observer/process_response.js b/data/extensions/jid1-KtlZuoiikVfFew@jetpack/resources/librejs/lib/http_observer/process_response.js deleted file mode 100644 index 924636b..0000000 --- a/data/extensions/jid1-KtlZuoiikVfFew@jetpack/resources/librejs/lib/http_observer/process_response.js +++ /dev/null @@ -1,420 +0,0 @@ -/** - * GNU LibreJS - A browser add-on to block nonfree nontrivial JavaScript. - * * - * Copyright (C) 2011, 2012, 2013, 2014 Loic J. Duros - * Copyright (C) 2014, 2015 Nik Nyby - * - * This file is part of GNU LibreJS. - * - * GNU LibreJS is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * GNU LibreJS is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with GNU LibreJS. If not, see <http://www.gnu.org/licenses/>. - */ - -/** - * This module checks http responses by mime type and returns a - * modified response. - */ - -var {Cc, Ci, Cu, Cm, Cr} = require("chrome"); - -var jsChecker = require("js_checker/js_checker"); - -const types = require("js_checker/constant_types"); -var checkTypes = types.checkTypes; - -// check if scripts embedded dynamically have a jsWebLabel entry indexed by referrer. -var jsWebLabelEntries = require("html_script_finder/web_labels/js_web_labels").jsWebLabelEntries; - -var htmlParser = require("html_script_finder/html_parser"); - -var removedScripts = require("script_entries/removed_scripts").removedScripts; -var allowedRef = require('http_observer/allowed_referrers').allowedReferrers; - -var acceptedScripts = require("script_entries/accepted_scripts").acceptedScripts; - -// used to display info when a url is whitelisted. -var dryRunScripts = require("script_entries/dryrun_scripts").dryRunScripts; - -// node.js url module. Makes it easier to resolve -// urls in that datauri loaded dom -var urlHandler = require("url_handler/url_handler"); -var isDryRun = require("addon_management/prefchange").isDryRun; - -var jsMimeTypeRe = /.*(javascript|ecmascript).*/i; -var htmlMimeTypeRe = /.*(xhtml\+xml|html|multipart\/x-mixed-replace).*/i; - - -var processResponseObject = { - data: null, - myParser: null, - url: null, - scriptFinder: null, - jsCheckString: null, - referrer: null, - contentType: null, - resInfo: null, - listener: null, - req: null, - - /** - * starts the handling of a new response. - */ - init: function (listener, resInfo) { - this.resInfo = resInfo; - this.req = resInfo.request; - /* needed for this.req.referrer */ - this.req.QueryInterface(Ci.nsIHttpChannel); - this.listener = listener; - this.setData(); - this.setContentType(); - this.setUrls(); - }, - - /** - * Gather the data gathered from onDataAvailable. - */ - setData: function () { - this.data = this.resInfo.receivedData; - //console.debug("\n\nDump of whole data:\n\n", this.data, "\n\n end of dump"); - // Prevents the http response body from being empty, - // which would throw an error. - if (this.data == '' || this.data == undefined) { - this.data = " "; - } - }, - - /** - * Set a standardized lowercase mime type. - */ - setContentType: function() { - if (this.req.contentType != undefined) { - this.contentType = String(this.req.contentType).toLowerCase(); - } - }, - - /** - * setUrls - * Set the current URL of the response, and - * set referrer if applicable. - */ - setUrls: function() { - - if (this.req.URI != undefined) { - this.fragment = urlHandler.getFragment(this.req.URI.spec); - console.debug('fragment is', this.fragment); - this.url = urlHandler.removeFragment(this.req.URI.spec); - } - if (this.req.referrer != undefined) { - this.referrerFragment = urlHandler.getFragment(this.req.referrer.spec); - this.referrer = urlHandler.removeFragment(this.req.referrer.spec); - } - }, - - /** - * processHTML - * Modifies a string of html - */ - processHTML: function() { - var charset = this.req.contentCharset, myParser; - - if (this.req.contentCharset != undefined && this.req.contentCharset != "") { - charset = this.req.contentCharset; - } else { - charset = ""; - } - acceptedScripts.clearScripts(this.req.URI.spec); - removedScripts.clearScripts(this.req.URI.spec); - dryRunScripts.clearScripts(this.req.URI.spec); - - console.debug('charset is', charset); - console.debug( - 'responseStatus for', this.url, 'is', this.req.responseStatus); - - // send data to htmlParser, and pass on modified data to - // originalListener. - - myParser = htmlParser.htmlParser().parse( - this.data, - charset, - this.contentType, - this.url, - this.fragment, - this.req.responseStatus, - this.htmlParseCallback.bind(this)); - }, - - /** - * - * htmlParseCallback - * - * Passed on the callback result to - * the originalListener. - * - */ - htmlParseCallback: function(result) { - - var len = result.length; - - try { - - this.listener.onDataAvailable( - this.req, - this.resInfo.context, - result.newInputStream(0), 0, len); - - - } catch (e) { - - this.req.cancel(this.req.NS_BINDING_ABORTED); - - } - - this.listener.onStopRequest( - this.req, - this.resInfo.context, this.resInfo.statusCode); - - }, - - /** - * processJS - * Process and modify a string of JavaScript. - */ - processJS: function() { - var checker, check, jsCheckString, - that = this; - - try { - // make sure script isn't already listed as free - // in a JS web labels table. - if (this.checkJsWebLabelsForScript()) { - // this is free. we are done. - this.jsListenerCallback(); - return; - } - - // analyze javascript in response. - checker = jsChecker.jsChecker(); - check = checker.searchJs(this.data, function () { - //console.debug("Has been analyzing", that.data); - that.processJsCallback(checker); - }, that.url); - - } catch(e) { - - // any error is considered nontrivial. - console.debug('js error in js app, removing script', e); - console.debug("error", e, e.lineNumber); - // modify data that will be sent to the browser. - this.data = '// LibreJS: Script contents were removed when it was loaded from a page, because another script attempted to load this one dynamically. Please place your cursor in the url bar and press the enter key to see the source.'; - this.jsListenerCallback(); - } - - }, - - /** - * checkJsWebLabelsForScript - * - * check whether script that's been received has an entry - * in a js web labels table (lookup referrer.) - * - */ - checkJsWebLabelsForScript: function () { - - console.debug('checking script', this.url); - console.debug('current list is', JSON.stringify(jsWebLabelEntries)); - if (jsWebLabelEntries[this.referrer] != undefined) { - - var scriptList = jsWebLabelEntries[this.referrer], - i = 0, - len = scriptList.length; - - for (; i < len; i++) { - - if (scriptList[i].fileUrl === this.url && - scriptList[i].free === true) { - - console.debug(this.url, "is free and dynamic!"); - - var scriptObj = { - inline: false, - url: this.url, - contents: this.url, - reason: "This script is free (see JS Web Labels page for detail)" - }; - - acceptedScripts.addAScript( - this.req.referrer.spec, scriptObj, "Script is free"); - - return true; - - } - } - } - }, - - processJsCallback: function(checker) { - try { - var scriptObj; - - var jsCheckString = checker.parseTree.freeTrivialCheck; - console.debug("analyzing js callback for", this.url); - // for testing only. - //var jsCheckString = {'type': checkTypes.FREE_SINGLE_ITEM }; - console.debug('jscheckstring is', jsCheckString.type); - - if (jsCheckString.type === checkTypes.NONTRIVIAL) { - if (!allowedRef.urlInAllowedReferrers(this.req.referrer.spec)) { - //if (true) { - console.debug( - "url", - this.url, - " is found nontrivial", - "with reason", - jsCheckString.reason); - scriptObj = { - inline: false, - contents: '', - removalReason: 'nontrivial', - reason: jsCheckString.reason, - url: this.url, - hash: checker.hash - }; - removedScripts.addAScript(this.req.referrer.spec, scriptObj); - - // modify data that will be sent to the browser. - this.data = '// LibreJS: Script contents were removed when it was loaded from a page, because another script attempted to load this one dynamically and its contents appear to be nonfree/nontrivial. Please hit enter in the location bar to see the actual source.'; - } else { - console.debug("writing to dry run", this.url); - scriptObj = { - inline:false, - contents: '', - removalReason: 'nontrivial', - reason: jsCheckString.reason, - url: this.url, - hash:checker.hash - }; - dryRunScripts.addAScript(this.req.referrer.spec, scriptObj); - } - - this.jsListenerCallback(); - - } else if (jsCheckString.type === checkTypes.FREE || - jsCheckString.type === checkTypes.FREE_SINGLE_ITEM || - jsCheckString.type === checkTypes.TRIVIAL || - jsCheckString.type === checkTypes.TRIVIAL_DEFINES_FUNCTION || - jsCheckString.type === checkTypes.WHITELISTED) { - console.debug( - "found a free script for", - this.url, - this.req.referrer.spec, - jsCheckString.reason); - console.debug('found a free script', this.req.referrer.spec); - - scriptObj = {inline: false, - contents: '', - reason: jsCheckString.reason, - url: this.url, - hash:checker.hash}; - - acceptedScripts.addAScript(this.req.referrer.spec, scriptObj); - this.jsListenerCallback(); - } - - //var end = Date.now(); - console.debug('exec time', this.url, ' -- ', end - start); - } catch (x) { - console.debug('error', x); - } - }, - - /** - * ProcessAllTypes - * Calls processHTML or JS if it finds an appropriate content - * type. For everything else it just passes on the data to the - * original listener. - */ - processAllTypes: function() { - // toggle xlibrejs if X-LibreJS is set. - - // process HTML - if ((htmlMimeTypeRe.test(this.contentType) || - this.req.contentType === undefined)) { - this.processHTML(); - return; - } - - else { - // process external JS files that are called from another - // file (and hence have a referrer). - - if (this.referrer != undefined && - jsMimeTypeRe.test(this.contentType) && - !(acceptedScripts.isFound(this.referrer, { - inline: false, contents: this.url})) && - !(acceptedScripts.isFound(this.referrer, { - inline:false, contents:this.req.originalURI.spec}))) { - - // console.debug('process js triggered for', this.url); - this.processJS(); - - } else { - this.jsListenerCallback(); - } - - } - - }, - - jsListenerCallback: function () { - - var converter = Cc["@mozilla.org/intl/scriptableunicodeconverter"] - .createInstance(Ci.nsIScriptableUnicodeConverter); - - if (typeof this.req.contentCharset !== 'undefined' && - this.req.contentCharset !== '' && - this.req.contentCharset !== null - ) { - converter.charset = this.req.contentCharset; - } else { - converter.charset = "UTF-8"; - } - - var stream = converter.convertToInputStream(this.data); - - try { - this.listener.onDataAvailable( - this.req, - this.resInfo.context, - stream, - 0, stream.available()); - } catch (e) { - this.req.cancel(this.req.NS_BINDING_ABORTED); - } - - this.listener.onStopRequest( - this.req, - this.resInfo.context, - this.resInfo.statusCode); - - } - - -}; - -// creates an instance of processResponseObject. -exports.ProcessResponse = function (listener, resInfo) { - console.debug('triggered'); - var procResponse = Object.create(processResponseObject); - procResponse.init(listener, resInfo); - return procResponse; -}; |