mirror of
https://github.com/gorhill/uBlock.git
synced 2024-11-11 17:41:03 +01:00
804 lines
25 KiB
JavaScript
804 lines
25 KiB
JavaScript
/*******************************************************************************
|
|
|
|
uBlock Origin - a browser extension to block requests.
|
|
Copyright (C) 2014-2017 Raymond Hill
|
|
|
|
This program 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.
|
|
|
|
This program 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 this program. If not, see {http://www.gnu.org/licenses/}.
|
|
|
|
Home: https://github.com/gorhill/uBlock
|
|
*/
|
|
|
|
'use strict';
|
|
|
|
/******************************************************************************/
|
|
|
|
// Start isolation from global scope
|
|
|
|
µBlock.webRequest = (function() {
|
|
|
|
/******************************************************************************/
|
|
|
|
var exports = {};
|
|
|
|
/******************************************************************************/
|
|
|
|
// https://github.com/gorhill/uBlock/issues/2067
|
|
// Experimental: Block everything until uBO is fully ready.
|
|
// TODO: re-work vAPI code to match more closely how listeners are
|
|
// registered with the webRequest API. This will simplify implementing
|
|
// the feature here: we could have a temporary onBeforeRequest listener
|
|
// which blocks everything until all is ready.
|
|
// This would allow to avoid the permanent special test at the top of
|
|
// the main onBeforeRequest just to implement this.
|
|
var onBeforeReady = null;
|
|
|
|
if ( µBlock.hiddenSettings.suspendTabsUntilReady ) {
|
|
onBeforeReady = (function() {
|
|
var suspendedTabs = new Set();
|
|
µBlock.onStartCompletedQueue.push(function(callback) {
|
|
onBeforeReady = null;
|
|
for ( var tabId of suspendedTabs ) {
|
|
vAPI.tabs.reload(tabId);
|
|
}
|
|
callback();
|
|
});
|
|
return function(tabId) {
|
|
if ( vAPI.isBehindTheSceneTabId(tabId) ) { return; }
|
|
suspendedTabs.add(tabId);
|
|
return true;
|
|
};
|
|
})();
|
|
} else {
|
|
µBlock.onStartCompletedQueue.push(function(callback) {
|
|
vAPI.onLoadAllCompleted();
|
|
callback();
|
|
});
|
|
}
|
|
|
|
/******************************************************************************/
|
|
|
|
// Intercept and filter web requests.
|
|
|
|
var onBeforeRequest = function(details) {
|
|
var tabId = details.tabId;
|
|
if ( onBeforeReady !== null && onBeforeReady(tabId) ) {
|
|
return { cancel: true };
|
|
}
|
|
|
|
// Special handling for root document.
|
|
// https://github.com/chrisaljoudi/uBlock/issues/1001
|
|
// This must be executed regardless of whether the request is
|
|
// behind-the-scene
|
|
var requestType = details.type;
|
|
if ( requestType === 'main_frame' ) {
|
|
return onBeforeRootFrameRequest(details);
|
|
}
|
|
|
|
// Special treatment: behind-the-scene requests
|
|
if ( vAPI.isBehindTheSceneTabId(tabId) ) {
|
|
return onBeforeBehindTheSceneRequest(details);
|
|
}
|
|
|
|
// Lookup the page store associated with this tab id.
|
|
var µb = µBlock,
|
|
pageStore = µb.pageStoreFromTabId(tabId);
|
|
if ( !pageStore ) {
|
|
var tabContext = µb.tabContextManager.mustLookup(tabId);
|
|
if ( vAPI.isBehindTheSceneTabId(tabContext.tabId) ) {
|
|
return onBeforeBehindTheSceneRequest(details);
|
|
}
|
|
vAPI.tabs.onNavigation({ tabId: tabId, frameId: 0, url: tabContext.rawURL });
|
|
pageStore = µb.pageStoreFromTabId(tabId);
|
|
}
|
|
|
|
// https://github.com/chrisaljoudi/uBlock/issues/886
|
|
// For requests of type `sub_frame`, the parent frame id must be used
|
|
// to lookup the proper context:
|
|
// > If the document of a (sub-)frame is loaded (type is main_frame or
|
|
// > sub_frame), frameId indicates the ID of this frame, not the ID of
|
|
// > the outer frame.
|
|
// > (ref: https://developer.chrome.com/extensions/webRequest)
|
|
var isFrame = requestType === 'sub_frame';
|
|
|
|
// https://github.com/chrisaljoudi/uBlock/issues/114
|
|
var requestContext = pageStore.createContextFromFrameId(
|
|
isFrame ? details.parentFrameId : details.frameId
|
|
);
|
|
|
|
// Setup context and evaluate
|
|
var requestURL = details.url;
|
|
requestContext.requestURL = requestURL;
|
|
requestContext.requestHostname = µb.URI.hostnameFromURI(requestURL);
|
|
requestContext.requestType = requestType;
|
|
|
|
var result = pageStore.filterRequest(requestContext);
|
|
|
|
pageStore.journalAddRequest(requestContext.requestHostname, result);
|
|
|
|
if ( µb.logger.isEnabled() ) {
|
|
µb.logger.writeOne(
|
|
tabId,
|
|
'net',
|
|
pageStore.logData,
|
|
requestType,
|
|
requestURL,
|
|
requestContext.rootHostname,
|
|
requestContext.pageHostname
|
|
);
|
|
}
|
|
|
|
// Not blocked
|
|
if ( result !== 1 ) {
|
|
// https://github.com/chrisaljoudi/uBlock/issues/114
|
|
if ( details.parentFrameId !== -1 && isFrame ) {
|
|
pageStore.setFrame(details.frameId, requestURL);
|
|
}
|
|
requestContext.dispose();
|
|
return;
|
|
}
|
|
|
|
// Blocked
|
|
|
|
// https://github.com/gorhill/uBlock/issues/949
|
|
// Redirect blocked request?
|
|
if ( µb.hiddenSettings.ignoreRedirectFilters !== true ) {
|
|
var url = µb.redirectEngine.toURL(requestContext);
|
|
if ( url !== undefined ) {
|
|
pageStore.internalRedirectionCount += 1;
|
|
if ( µb.logger.isEnabled() ) {
|
|
µb.logger.writeOne(
|
|
tabId,
|
|
'redirect',
|
|
{ source: 'redirect', raw: µb.redirectEngine.resourceNameRegister },
|
|
requestType,
|
|
requestURL,
|
|
requestContext.rootHostname,
|
|
requestContext.pageHostname
|
|
);
|
|
}
|
|
requestContext.dispose();
|
|
return { redirectUrl: url };
|
|
}
|
|
}
|
|
|
|
requestContext.dispose();
|
|
return { cancel: true };
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
var onBeforeRootFrameRequest = function(details) {
|
|
var tabId = details.tabId,
|
|
requestURL = details.url,
|
|
µb = µBlock;
|
|
|
|
µb.tabContextManager.push(tabId, requestURL);
|
|
|
|
// Special handling for root document.
|
|
// https://github.com/chrisaljoudi/uBlock/issues/1001
|
|
// This must be executed regardless of whether the request is
|
|
// behind-the-scene
|
|
var µburi = µb.URI,
|
|
requestHostname = µburi.hostnameFromURI(requestURL),
|
|
requestDomain = µburi.domainFromHostname(requestHostname) || requestHostname;
|
|
var context = {
|
|
rootHostname: requestHostname,
|
|
rootDomain: requestDomain,
|
|
pageHostname: requestHostname,
|
|
pageDomain: requestDomain,
|
|
requestURL: requestURL,
|
|
requestHostname: requestHostname,
|
|
requestType: 'main_frame'
|
|
};
|
|
var result = 0,
|
|
logData,
|
|
logEnabled = µb.logger.isEnabled();
|
|
|
|
// If the site is whitelisted, disregard strict blocking
|
|
if ( µb.getNetFilteringSwitch(requestURL) === false ) {
|
|
result = 2;
|
|
if ( logEnabled === true ) {
|
|
logData = { engine: 'u', result: 2, raw: 'whitelisted' };
|
|
}
|
|
}
|
|
|
|
// Permanently unrestricted?
|
|
if ( result === 0 && µb.hnSwitches.evaluateZ('no-strict-blocking', requestHostname) ) {
|
|
result = 2;
|
|
if ( logEnabled === true ) {
|
|
logData = { engine: 'u', result: 2, raw: 'no-strict-blocking: ' + µb.hnSwitches.z + ' true' };
|
|
}
|
|
}
|
|
|
|
// Temporarily whitelisted?
|
|
if ( result === 0 ) {
|
|
result = isTemporarilyWhitelisted(result, requestHostname);
|
|
if ( result === 2 && logEnabled === true ) {
|
|
logData = { engine: 'u', result: 2, raw: 'no-strict-blocking true (temporary)' };
|
|
}
|
|
}
|
|
|
|
// Static filtering: We always need the long-form result here.
|
|
var snfe = µb.staticNetFilteringEngine;
|
|
|
|
// Check for specific block
|
|
if ( result === 0 ) {
|
|
result = snfe.matchStringExactType(context, requestURL, 'main_frame');
|
|
if ( result !== 0 || logEnabled === true ) {
|
|
logData = snfe.toLogData();
|
|
}
|
|
}
|
|
|
|
// Check for generic block
|
|
if ( result === 0 ) {
|
|
result = snfe.matchStringExactType(context, requestURL, 'no_type');
|
|
if ( result !== 0 || logEnabled === true ) {
|
|
logData = snfe.toLogData();
|
|
}
|
|
// https://github.com/chrisaljoudi/uBlock/issues/1128
|
|
// Do not block if the match begins after the hostname, except when
|
|
// the filter is specifically of type `other`.
|
|
// https://github.com/gorhill/uBlock/issues/490
|
|
// Removing this for the time being, will need a new, dedicated type.
|
|
if (
|
|
result === 1 &&
|
|
toBlockDocResult(requestURL, requestHostname, logData) === false
|
|
) {
|
|
result = 0;
|
|
logData = undefined;
|
|
}
|
|
}
|
|
|
|
// Log
|
|
var pageStore = µb.bindTabToPageStats(tabId, 'beforeRequest');
|
|
if ( pageStore ) {
|
|
pageStore.journalAddRootFrame('uncommitted', requestURL);
|
|
pageStore.journalAddRequest(requestHostname, result);
|
|
}
|
|
|
|
if ( logEnabled ) {
|
|
µb.logger.writeOne(
|
|
tabId,
|
|
'net',
|
|
logData,
|
|
'main_frame',
|
|
requestURL,
|
|
requestHostname,
|
|
requestHostname
|
|
);
|
|
}
|
|
|
|
// Not blocked
|
|
if ( result !== 1 ) { return; }
|
|
|
|
// No log data means no strict blocking (because we need to report why
|
|
// the blocking occurs.
|
|
if ( logData === undefined ) { return; }
|
|
|
|
// Blocked
|
|
var query = btoa(JSON.stringify({
|
|
url: requestURL,
|
|
hn: requestHostname,
|
|
dn: requestDomain,
|
|
fc: logData.compiled,
|
|
fs: logData.raw
|
|
}));
|
|
|
|
vAPI.tabs.replace(tabId, vAPI.getURL('document-blocked.html?details=') + query);
|
|
|
|
return { cancel: true };
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
// https://github.com/gorhill/uBlock/issues/3208
|
|
// Mind case insensitivity.
|
|
|
|
var toBlockDocResult = function(url, hostname, logData) {
|
|
if ( typeof logData.regex !== 'string' ) { return false; }
|
|
var re = new RegExp(logData.regex, 'i'),
|
|
match = re.exec(url.toLowerCase());
|
|
if ( match === null ) { return false; }
|
|
|
|
// https://github.com/chrisaljoudi/uBlock/issues/1128
|
|
// https://github.com/chrisaljoudi/uBlock/issues/1212
|
|
// Relax the rule: verify that the match is completely before the path part
|
|
return (match.index + match[0].length) <=
|
|
(url.indexOf(hostname) + hostname.length + 1);
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
// Intercept and filter behind-the-scene requests.
|
|
|
|
// https://github.com/gorhill/uBlock/issues/870
|
|
// Finally, Chromium 49+ gained the ability to report network request of type
|
|
// `beacon`, so now we can block them according to the state of the
|
|
// "Disable hyperlink auditing/beacon" setting.
|
|
|
|
var onBeforeBehindTheSceneRequest = function(details) {
|
|
var µb = µBlock,
|
|
pageStore = µb.pageStoreFromTabId(vAPI.noTabId);
|
|
if ( !pageStore ) { return; }
|
|
|
|
var result = 0,
|
|
context = pageStore.createContextFromPage(),
|
|
requestType = details.type,
|
|
requestURL = details.url;
|
|
|
|
context.requestURL = requestURL;
|
|
context.requestHostname = µb.URI.hostnameFromURI(requestURL);
|
|
context.requestType = requestType;
|
|
|
|
// https://bugs.chromium.org/p/chromium/issues/detail?id=637577#c15
|
|
// Do not filter behind-the-scene network request of type `beacon`: there
|
|
// is no point. In any case, this will become a non-issue once
|
|
// <https://bugs.chromium.org/p/chromium/issues/detail?id=522129> is
|
|
// fixed.
|
|
|
|
// Blocking behind-the-scene requests can break a lot of stuff: prevent
|
|
// browser updates, prevent extension updates, prevent extensions from
|
|
// working properly, etc.
|
|
// So we filter if and only if the "advanced user" mode is selected.
|
|
// https://github.com/gorhill/uBlock/issues/3150
|
|
// Ability to globally block CSP reports MUST also apply to
|
|
// behind-the-scene network requests.
|
|
if ( µb.userSettings.advancedUserEnabled || requestType === 'csp_report' ) {
|
|
result = pageStore.filterRequest(context);
|
|
}
|
|
|
|
pageStore.journalAddRequest(context.requestHostname, result);
|
|
|
|
if ( µb.logger.isEnabled() ) {
|
|
µb.logger.writeOne(
|
|
vAPI.noTabId,
|
|
'net',
|
|
pageStore.logData,
|
|
requestType,
|
|
requestURL,
|
|
context.rootHostname,
|
|
context.rootHostname
|
|
);
|
|
}
|
|
|
|
context.dispose();
|
|
|
|
// Blocked?
|
|
if ( result === 1 ) {
|
|
return { 'cancel': true };
|
|
}
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
// https://github.com/gorhill/uBlock/issues/3140
|
|
|
|
var onBeforeMaybeSpuriousCSPReport = function(details) {
|
|
var tabId = details.tabId;
|
|
|
|
// Ignore behind-the-scene requests.
|
|
if ( vAPI.isBehindTheSceneTabId(tabId) ) { return; }
|
|
|
|
// Lookup the page store associated with this tab id.
|
|
var µb = µBlock,
|
|
pageStore = µb.pageStoreFromTabId(tabId);
|
|
if ( pageStore === null ) { return; }
|
|
|
|
// If uBO is disabled for the page, it can't possibly causes CSP reports
|
|
// to be triggered.
|
|
if ( pageStore.getNetFilteringSwitch() === false ) { return; }
|
|
|
|
// A resource was redirected to a neutered one?
|
|
// TODO: mind injected scripts/styles as well.
|
|
if ( pageStore.internalRedirectionCount === 0 ) { return; }
|
|
|
|
var textDecoder = onBeforeMaybeSpuriousCSPReport.textDecoder;
|
|
if (
|
|
textDecoder === undefined &&
|
|
typeof self.TextDecoder === 'function'
|
|
) {
|
|
textDecoder =
|
|
onBeforeMaybeSpuriousCSPReport.textDecoder = new TextDecoder();
|
|
}
|
|
|
|
// Find out whether the CSP report is a potentially spurious CSP report.
|
|
// If from this point on we are unable to parse the CSP report data, the
|
|
// safest assumption to protect users is to assume the CSP report is
|
|
// spurious.
|
|
if (
|
|
textDecoder !== undefined &&
|
|
details.method === 'POST'
|
|
) {
|
|
var raw = details.requestBody && details.requestBody.raw;
|
|
if (
|
|
Array.isArray(raw) &&
|
|
raw.length !== 0 &&
|
|
raw[0] instanceof Object &&
|
|
raw[0].bytes instanceof ArrayBuffer
|
|
) {
|
|
var data;
|
|
try {
|
|
data = JSON.parse(textDecoder.decode(raw[0].bytes));
|
|
} catch (ex) {
|
|
}
|
|
if ( data instanceof Object ) {
|
|
var report = data['csp-report'];
|
|
if ( report instanceof Object ) {
|
|
var blocked = report['blocked-uri'] || report['blockedURI'],
|
|
validBlocked = typeof blocked === 'string',
|
|
source = report['source-file'] || report['sourceFile'],
|
|
validSource = typeof source === 'string';
|
|
if (
|
|
(validBlocked || validSource) &&
|
|
(!validBlocked || !blocked.startsWith('data')) &&
|
|
(!validSource || !source.startsWith('data'))
|
|
) {
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Potentially spurious CSP report.
|
|
if ( µb.logger.isEnabled() ) {
|
|
var hostname = µb.URI.hostnameFromURI(details.url);
|
|
µb.logger.writeOne(
|
|
tabId,
|
|
'net',
|
|
{ result: 1, source: 'global', raw: 'no-spurious-csp-report' },
|
|
'csp_report',
|
|
details.url,
|
|
hostname,
|
|
hostname
|
|
);
|
|
}
|
|
|
|
return { cancel: true };
|
|
};
|
|
|
|
onBeforeMaybeSpuriousCSPReport.textDecoder = undefined;
|
|
|
|
/******************************************************************************/
|
|
|
|
// To handle:
|
|
// - inline script tags
|
|
// - websockets
|
|
// - media elements larger than n kB
|
|
|
|
var onHeadersReceived = function(details) {
|
|
// Do not interfere with behind-the-scene requests.
|
|
var tabId = details.tabId;
|
|
if ( vAPI.isBehindTheSceneTabId(tabId) ) { return; }
|
|
|
|
var µb = µBlock,
|
|
requestType = details.type;
|
|
|
|
if ( requestType === 'main_frame' ) {
|
|
µb.tabContextManager.push(tabId, details.url);
|
|
}
|
|
|
|
var pageStore = µb.pageStoreFromTabId(tabId);
|
|
if ( pageStore === null ) {
|
|
if ( requestType !== 'main_frame' ) { return; }
|
|
pageStore = µb.bindTabToPageStats(tabId, 'beforeRequest');
|
|
}
|
|
if ( pageStore.getNetFilteringSwitch() === false ) { return; }
|
|
|
|
if ( requestType === 'image' || requestType === 'media' ) {
|
|
return foilLargeMediaElement(pageStore, details);
|
|
}
|
|
|
|
// https://github.com/gorhill/uBlock/issues/2813
|
|
// Disable the blocking of large media elements if the document is itself
|
|
// a media element: the resource was not prevented from loading so no
|
|
// point to further block large media elements for the current document.
|
|
if ( requestType === 'main_frame' ) {
|
|
if ( reMediaContentTypes.test(headerValueFromName('content-type', details.responseHeaders)) ) {
|
|
pageStore.allowLargeMediaElementsUntil = Date.now() + 86400000;
|
|
}
|
|
return injectCSP(pageStore, details);
|
|
}
|
|
|
|
if ( requestType === 'sub_frame' ) {
|
|
return injectCSP(pageStore, details);
|
|
}
|
|
};
|
|
|
|
var reMediaContentTypes = /^(?:audio|image|video)\//;
|
|
|
|
/******************************************************************************/
|
|
|
|
var injectCSP = function(pageStore, details) {
|
|
var µb = µBlock,
|
|
tabId = details.tabId,
|
|
requestURL = details.url,
|
|
loggerEnabled = µb.logger.isEnabled(),
|
|
logger = µb.logger,
|
|
cspSubsets = [];
|
|
|
|
var context = pageStore.createContextFromPage();
|
|
context.requestHostname = µb.URI.hostnameFromURI(requestURL);
|
|
if ( details.type !== 'main_frame' ) {
|
|
context.pageHostname = context.pageDomain = context.requestHostname;
|
|
}
|
|
context.requestURL = requestURL;
|
|
|
|
// Start collecting policies >>>>>>>>
|
|
|
|
// ======== built-in policies
|
|
|
|
var builtinDirectives = [];
|
|
|
|
context.requestType = 'inline-script';
|
|
if ( pageStore.filterRequest(context) === 1 ) {
|
|
builtinDirectives.push("script-src 'unsafe-eval' * blob: data:");
|
|
}
|
|
if ( loggerEnabled === true ) {
|
|
logger.writeOne(
|
|
tabId,
|
|
'net',
|
|
pageStore.logData,
|
|
'inline-script',
|
|
requestURL,
|
|
context.rootHostname,
|
|
context.pageHostname
|
|
);
|
|
}
|
|
|
|
// https://github.com/gorhill/uBlock/issues/1539
|
|
// - Use a CSP to also forbid inline fonts if remote fonts are blocked.
|
|
context.requestType = 'inline-font';
|
|
if ( pageStore.filterRequest(context) === 1 ) {
|
|
builtinDirectives.push('font-src *');
|
|
if ( loggerEnabled === true ) {
|
|
logger.writeOne(
|
|
tabId,
|
|
'net',
|
|
pageStore.logData,
|
|
'inline-font',
|
|
requestURL,
|
|
context.rootHostname,
|
|
context.pageHostname
|
|
);
|
|
}
|
|
}
|
|
|
|
if ( builtinDirectives.length !== 0 ) {
|
|
cspSubsets[0] = builtinDirectives.join('; ');
|
|
}
|
|
|
|
// ======== filter-based policies
|
|
|
|
// Static filtering.
|
|
|
|
var logDataEntries = [];
|
|
|
|
µb.staticNetFilteringEngine.matchAndFetchData(
|
|
'csp',
|
|
requestURL,
|
|
cspSubsets,
|
|
loggerEnabled === true ? logDataEntries : undefined
|
|
);
|
|
|
|
// URL filtering `allow` rules override static filtering.
|
|
if (
|
|
cspSubsets.length !== 0 &&
|
|
µb.sessionURLFiltering.evaluateZ(context.rootHostname, requestURL, 'csp') === 2
|
|
) {
|
|
if ( loggerEnabled === true ) {
|
|
logger.writeOne(
|
|
tabId,
|
|
'net',
|
|
µb.sessionURLFiltering.toLogData(),
|
|
'csp',
|
|
requestURL,
|
|
context.rootHostname,
|
|
context.pageHostname
|
|
);
|
|
}
|
|
context.dispose();
|
|
return;
|
|
}
|
|
|
|
// Dynamic filtering `allow` rules override static filtering.
|
|
if (
|
|
cspSubsets.length !== 0 &&
|
|
µb.userSettings.advancedUserEnabled &&
|
|
µb.sessionFirewall.evaluateCellZY(context.rootHostname, context.rootHostname, '*') === 2
|
|
) {
|
|
if ( loggerEnabled === true ) {
|
|
logger.writeOne(
|
|
tabId,
|
|
'net',
|
|
µb.sessionFirewall.toLogData(),
|
|
'csp',
|
|
requestURL,
|
|
context.rootHostname,
|
|
context.pageHostname
|
|
);
|
|
}
|
|
context.dispose();
|
|
return;
|
|
}
|
|
|
|
// <<<<<<<< All policies have been collected
|
|
|
|
// Static CSP policies will be applied.
|
|
for ( var entry of logDataEntries ) {
|
|
logger.writeOne(
|
|
tabId,
|
|
'net',
|
|
entry,
|
|
'csp',
|
|
requestURL,
|
|
context.rootHostname,
|
|
context.pageHostname
|
|
);
|
|
}
|
|
|
|
context.dispose();
|
|
|
|
if ( cspSubsets.length === 0 ) {
|
|
return;
|
|
}
|
|
|
|
µb.updateBadgeAsync(tabId);
|
|
|
|
var csp,
|
|
headers = details.responseHeaders,
|
|
i = headerIndexFromName('content-security-policy', headers);
|
|
if ( i !== -1 ) {
|
|
csp = headers[i].value.trim();
|
|
headers.splice(i, 1);
|
|
}
|
|
cspSubsets = cspSubsets.join(', ');
|
|
// Use comma to add a new subset to potentially existing one(s). This new
|
|
// subset has its own reporting options and won't cause spurious CSP
|
|
// reports to outside world.
|
|
// Ref.: https://www.w3.org/TR/CSP2/#implementation-considerations
|
|
headers.push({
|
|
name: 'Content-Security-Policy',
|
|
value: csp === undefined ? cspSubsets : csp + ', ' + cspSubsets
|
|
});
|
|
|
|
return { 'responseHeaders': headers };
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
// https://github.com/gorhill/uBlock/issues/1163
|
|
// "Block elements by size"
|
|
|
|
var foilLargeMediaElement = function(pageStore, details) {
|
|
var µb = µBlock;
|
|
|
|
var i = headerIndexFromName('content-length', details.responseHeaders);
|
|
if ( i === -1 ) { return; }
|
|
|
|
var tabId = details.tabId,
|
|
size = parseInt(details.responseHeaders[i].value, 10) || 0,
|
|
result = pageStore.filterLargeMediaElement(size);
|
|
if ( result === 0 ) { return; }
|
|
|
|
if ( µb.logger.isEnabled() ) {
|
|
µb.logger.writeOne(
|
|
tabId,
|
|
'net',
|
|
pageStore.logData,
|
|
details.type,
|
|
details.url,
|
|
pageStore.tabHostname,
|
|
pageStore.tabHostname
|
|
);
|
|
}
|
|
|
|
return { cancel: true };
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
// Caller must ensure headerName is normalized to lower case.
|
|
|
|
var headerIndexFromName = function(headerName, headers) {
|
|
var i = headers.length;
|
|
while ( i-- ) {
|
|
if ( headers[i].name.toLowerCase() === headerName ) {
|
|
return i;
|
|
}
|
|
}
|
|
return -1;
|
|
};
|
|
|
|
var headerValueFromName = function(headerName, headers) {
|
|
var i = headerIndexFromName(headerName, headers);
|
|
return i !== -1 ? headers[i].value : '';
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
vAPI.net.onBeforeRequest = {
|
|
urls: [
|
|
'http://*/*',
|
|
'https://*/*'
|
|
],
|
|
extra: [ 'blocking' ],
|
|
callback: onBeforeRequest
|
|
};
|
|
|
|
vAPI.net.onBeforeMaybeSpuriousCSPReport = {
|
|
callback: onBeforeMaybeSpuriousCSPReport
|
|
};
|
|
|
|
vAPI.net.onHeadersReceived = {
|
|
urls: [
|
|
'http://*/*',
|
|
'https://*/*'
|
|
],
|
|
types: [
|
|
'main_frame',
|
|
'sub_frame',
|
|
'image',
|
|
'media'
|
|
],
|
|
extra: [ 'blocking', 'responseHeaders' ],
|
|
callback: onHeadersReceived
|
|
};
|
|
|
|
vAPI.net.registerListeners();
|
|
|
|
/******************************************************************************/
|
|
|
|
var isTemporarilyWhitelisted = function(result, hostname) {
|
|
var obsolete, pos;
|
|
|
|
for (;;) {
|
|
obsolete = documentWhitelists[hostname];
|
|
if ( obsolete !== undefined ) {
|
|
if ( obsolete > Date.now() ) {
|
|
if ( result === 0 ) {
|
|
return 2;
|
|
}
|
|
} else {
|
|
delete documentWhitelists[hostname];
|
|
}
|
|
}
|
|
pos = hostname.indexOf('.');
|
|
if ( pos === -1 ) { break; }
|
|
hostname = hostname.slice(pos + 1);
|
|
}
|
|
return result;
|
|
};
|
|
|
|
var documentWhitelists = Object.create(null);
|
|
|
|
/******************************************************************************/
|
|
|
|
exports.temporarilyWhitelistDocument = function(hostname) {
|
|
if ( typeof hostname !== 'string' || hostname === '' ) {
|
|
return;
|
|
}
|
|
|
|
documentWhitelists[hostname] = Date.now() + 60 * 1000;
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
return exports;
|
|
|
|
/******************************************************************************/
|
|
|
|
})();
|
|
|
|
/******************************************************************************/
|