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'use strict';
{
let xmlFeedOrImage = /^(?:(?:application|text)\/(?:(?:r(?:ss|df)|atom)\+)xml(;|$))|image\//i;
let rawXml = /^(?:application|text)\/xml;/i;
let brokenXMLOnLoad;
let pendingRequests = new Map();
let reloadingTabs = new Map();
let tabKey = (tabId, url) => `${tabId}:${url}`;
let cleanup = r => {
pendingRequests.delete(r.requestId);
let key = tabKey(r.tabId, r.url);
if (reloadingTabs.get(key) === false) {
reloadingTabs.delete(key);
}
};
let executeAll = async request => {
let {url, tabId, frameId, requestId} = request;
let scripts = pendingRequests.get(requestId);
if (!scripts) return -1;
pendingRequests.delete(requestId);
let count = 0;
for (let details of scripts.values()) {
details = Object.assign({
runAt: "document_start",
matchAboutBlank: true,
frameId,
}, details);
try {
await browser.tabs.executeScript(tabId, details);
count++;
debug("Execute on start OK", url, details);
} catch (e) {
error(e, "Execute on start failed", url, details);
}
}
return count;
};
{
let filter = {
urls: ["<all_urls>"],
types: ["main_frame", "sub_frame", "object"]
};
let wr = browser.webRequest;
for (let event of ["onCompleted", "onErrorOccurred"])
wr[event].addListener(cleanup, filter);
filter.types = ["main_frame"];
wr.onResponseStarted.addListener(executeAll, filter);
}
var RequestUtil = {
getResponseMetaData(request) {
return request.response || (request.response = new ResponseMetaData(request));
},
async executeOnStart(request, details) {
let {requestId, url, tabId, frameId, statusCode} = request;
if (statusCode >= 300 && statusCode < 400) return;
if (frameId === 0) {
let key = tabKey(tabId, url);
debug("Checking whether %s is a reloading tab...", key);
if (reloadingTabs.get(key)) {
reloadingTabs.set(key, false); // doom it for removal in cleanup
return;
}
}
let response = this.getResponseMetaData(request);
let {contentType, contentDisposition} = response;
if (contentDisposition ||
xmlFeedOrImage.test(contentType) && !/\/svg\b/i.test(contentType)) {
debug("Skipping execute on start of %s %o.", url, response);
return;
}
debug("Injecting script on start in %s (%o).", url, response);
let scripts = pendingRequests.get(requestId);
let scriptKey = JSON.stringify(details);
if (!scripts) {
pendingRequests.set(requestId, scripts = new Map());
scripts.set(scriptKey, details);
} else {
scripts.set(scriptKey, details);
return;
}
if (request.type === "main_frame"
&& /^(?:application|text)\//.test(contentType)
&& !/[^;]+\b(html|xml)\b/i.test(contentType)) {
debug("Not HTML, but top-level document: defer script to onResponseStarted for %s (%o)", url, response);
return;
}
if (typeof brokenXMLOnLoad === "undefined") {
brokenXMLOnLoad = await (async () => parseInt((await browser.runtime.getBrowserInfo()).version) < 61)();
}
let mustCheckFeed = brokenXMLOnLoad && frameId === 0 && rawXml.test(contentType);
debug("mustCheckFeed = %s, brokenXMLOnLoad = %s", mustCheckFeed, brokenXMLOnLoad);
let filter = browser.webRequest.filterResponseData(requestId);
let buffer = [];
let first = true;
let done = false;
let mustReload = false;
let runAndFlush = async () => {
let scriptsRan = await executeAll(request);
if (mustCheckFeed && !scriptsRan) {
mustReload = true;
debug(`Marking as "must reload"`, tabId, url);
reloadingTabs.set(tabKey(tabId, url), true);
}
if (buffer && buffer.length) {
debug("Flushing %s buffer chunks", buffer.length);
for (let chunk of buffer) {
filter.write(chunk);
}
filter.disconnect();
buffer = null;
}
if (done) {
filter.onstop(null);
}
};
filter.ondata = event => {
if (first) {
runAndFlush();
first = false;
}
if (buffer) {
debug("buffering", url);
buffer.push(event.data);
return;
}
debug("ondata", url);
filter.write(event.data);
filter.disconnect();
};
filter.onstop = event => {
done = true;
if (mustReload && !buffer) {
mustReload = false;
browser.tabs.update(tabId, {url});
}
}
}
}
}
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