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Bug 1328553 - Part 1: Add a method to NetmonitorController that waits for requests to finish r=jryans

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MozReview-Commit-ID: IP18VjUaYCk

--HG--
extra : rebase_source : 3767c3c2a7dfd781fdeb5d30090e777b707c6b14
This commit is contained in:
Jarda Snajdr 2017-01-04 11:14:22 +01:00
parent 180328b651
commit 23dbd28f5f
1 changed files with 49 additions and 1 deletions
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50
devtools/client/netmonitor/netmonitor-controller.js
View File

@ -318,7 +318,55 @@ var NetMonitorController = {
*/
viewSourceInDebugger(sourceURL, sourceLine) {
return this._toolbox.viewSourceInDebugger(sourceURL, sourceLine);
}
},
/**
* Start monitoring all incoming update events about network requests and wait until
* a complete info about all requests is received. (We wait for the timings info
* explicitly, because that's always the last piece of information that is received.)
*
* This method is designed to wait for network requests that are issued during a page
* load, when retrieving page resources (scripts, styles, images). It has certain
* assumptions that can make it unsuitable for other types of network communication:
* - it waits for at least one network request to start and finish before returning
* - it waits only for request that were issued after it was called. Requests that are
* already in mid-flight will be ignored.
* - the request start and end times are overlapping. If a new request starts a moment
* after the previous one was finished, the wait will be ended in the "interim"
* period.
* @returns a promise that resolves when the wait is done.
* TODO: should be unified with whenDataAvailable in netmonitor-view.js
*/
waitForAllRequestsFinished() {
return new Promise(resolve => {
// Key is the request id, value is a boolean - is request finished or not?
let requests = new Map();
function onRequest(_, id) {
requests.set(id, false);
}
function onTimings(_, id) {
requests.set(id, true);
maybeResolve();
}
function maybeResolve() {
// Have all the requests in the map finished yet?
if (![...requests.values()].every(finished => finished)) {
return;
}
// All requests are done - unsubscribe from events and resolve!
window.off(EVENTS.NETWORK_EVENT, onRequest);
window.off(EVENTS.RECEIVED_EVENT_TIMINGS, onTimings);
resolve();
}
window.on(EVENTS.NETWORK_EVENT, onRequest);
window.on(EVENTS.RECEIVED_EVENT_TIMINGS, onTimings);
});
},
};
/**