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|
/*
* Listens for HTTP request responses, sending first- and
* third-party requests to storage.
*/
const capture = {
init() {
this.addListeners();
},
addListeners() {
// listen for each HTTP response
this.queue = [];
browser.webRequest.onResponseStarted.addListener(
response => {
const eventDetails = {
type: 'sendThirdParty',
data: response
};
this.queue.push(eventDetails);
this.processNextEvent();
},
{ urls: ['<all_urls>'] }
);
// listen for tab updates
browser.tabs.onUpdated.addListener((tabId, changeInfo, tab) => {
const eventDetails = {
type: 'sendFirstParty',
data: {
tabId,
changeInfo,
tab
}
};
this.queue.push(eventDetails);
this.processNextEvent();
});
},
// Process each HTTP request or tab page load in order,
// so that async reads/writes to IndexedDB
// (via sendFirstParty and sendThirdParty) won't miss data
// The 'ignore' boolean ensures processNextEvent is only
// executed when the previous call to processNextEvent
// has completed.
async processNextEvent(ignore = false) {
if (this.processingQueue && !ignore) {
return;
}
if (this.queue.length >= 1) {
try {
const nextEvent = this.queue.shift();
this.processingQueue = true;
switch (nextEvent.type) {
case 'sendFirstParty':
await this.sendFirstParty(
nextEvent.data.tabId,
nextEvent.data.changeInfo,
nextEvent.data.tab
);
break;
case 'sendThirdParty':
await this.sendThirdParty(nextEvent.data);
break;
default:
throw new Error(
'An event must be of type sendFirstParty or sendThirdParty.'
);
}
} catch (e) {
// eslint-disable-next-line no-console
console.warn('Exception found in queue process', e);
}
this.processNextEvent(true);
} else {
this.processingQueue = false;
}
},
// Returns true if the request should be stored, otherwise false.
// info could be a tab (from setFirstParty) or a
// response (from setThirdParty) object
async shouldStore(info) {
const tabId = info.id || info.tabId;
let documentUrl, privateBrowsing;
// Ignore container tabs as we need to store them correctly
// showing a simpler graph just for default means we won't confuse users
// into thinking isolation has broken
const defaultCookieStore = 'firefox-default';
if ('cookieStoreId' in info && info.cookieStoreId !== defaultCookieStore) {
return false;
}
if (this.isVisibleTab(tabId)) {
const tab = await this.getTab(tabId);
if (!tab) {
return;
}
if (tab.cookieStoreId !== defaultCookieStore) {
return false;
}
documentUrl = new URL(tab.url);
privateBrowsing = tab.incognito;
} else {
// if we were not able to check the cookie store
// lets drop this for paranoia sake.
if (!('cookieStoreId' in info)) {
return false;
}
// browser.tabs.get throws an error for nonvisible tabs (tabId = -1)
// but some non-visible tabs can make third party requests,
// ex: Service Workers
documentUrl = new URL(info.originUrl);
privateBrowsing = false;
}
// ignore about:*, moz-extension:*
// also ignore private browsing tabs
if (
documentUrl.protocol !== 'about:' &&
documentUrl.protocol !== 'moz-extension:' &&
!privateBrowsing
) {
return true;
}
return false;
},
isVisibleTab(tabId) {
return tabId !== browser.tabs.TAB_ID_NONE;
},
async getTab(tabId) {
let tab;
try {
tab = await browser.tabs.get(tabId);
} catch (e) {
// Lets ignore tabs we can't get hold of (likely have closed)
return;
}
return tab;
},
// capture third party requests
async sendThirdParty(response) {
// console.log('response', response);
if (!response.originUrl) {
// originUrl is undefined for the first request from the browser to the
// first party site
return;
}
// @todo figure out why Web Extensions sometimes gives
// undefined for response.originUrl
const originUrl = response.originUrl ? new URL(response.originUrl) : '';
const targetUrl = new URL(response.url);
let firstPartyUrl;
if (this.isVisibleTab(response.tabId)) {
const tab = await this.getTab(response.tabId);
if (!tab) {
return;
}
firstPartyUrl = new URL(tab.url);
} else {
firstPartyUrl = new URL(response.originUrl);
}
if (
firstPartyUrl.hostname &&
targetUrl.hostname !== firstPartyUrl.hostname &&
(await this.shouldStore(response))
) {
const data = {
target: targetUrl.hostname,
origin: originUrl.hostname,
requestTime: response.timeStamp,
firstParty: false
};
await store.setThirdParty(
firstPartyUrl.hostname,
targetUrl.hostname,
data
);
}
},
// capture first party requests
async sendFirstParty(tabId, changeInfo, tab) {
const documentUrl = new URL(tab.url);
if (
documentUrl.hostname &&
tab.status === 'complete' &&
(await this.shouldStore(tab))
) {
const data = {
faviconUrl: tab.favIconUrl,
firstParty: true,
requestTime: Date.now()
};
await store.setFirstParty(documentUrl.hostname, data);
}
}
};
capture.init();
|
