зеркало из https://github.com/mozilla/gecko-dev.git
112 строки
3.1 KiB
JavaScript
112 строки
3.1 KiB
JavaScript
/*
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Tests the Cache-control: stale-while-revalidate response directive.
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Purpose is to check we perform the background revalidation when the window is set
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and we hit it.
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* Make request #1.
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- response is from the server and version=1
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- max-age=1, stale-while-revalidate=9999
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* Switch version of the data on the server and prolong the max-age to not let req #3
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do a bck reval at the end of the test (prevent leaks/shutdown races.)
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* Make request #2 in 2 seconds (entry should be expired by that time, but fall into
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the reval window.)
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- response is from the cache, version=1
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- a new background request should be made for the data
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* Wait for "http-on-background-revalidation" notifying finish of the background reval.
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* Make request #3.
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- response is from the cache, version=2
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* Done.
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*/
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"use strict";
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const { HttpServer } = ChromeUtils.import("resource://testing-common/httpd.js");
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let max_age;
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let version;
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let generate_response = ver => `response version=${ver}`;
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function test_handler(metadata, response) {
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const originalBody = generate_response(version);
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response.setHeader("Content-Type", "text/html", false);
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response.setHeader(
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"Cache-control",
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`max-age=${max_age}, stale-while-revalidate=9999`,
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false
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);
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response.setStatusLine(metadata.httpVersion, 200, "OK");
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response.bodyOutputStream.write(originalBody, originalBody.length);
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}
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function make_channel(url) {
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return NetUtil.newChannel({
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uri: url,
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loadUsingSystemPrincipal: true,
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}).QueryInterface(Ci.nsIHttpChannel);
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}
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async function get_response(channel, fromCache) {
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return new Promise(resolve => {
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channel.asyncOpen(
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new ChannelListener((request, buffer, ctx, isFromCache) => {
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ok(fromCache == isFromCache, `got response from cache = ${fromCache}`);
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resolve(buffer);
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})
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);
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});
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}
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async function sleep(time) {
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return new Promise(resolve => {
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do_timeout(time * 1000, resolve);
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});
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}
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async function stop_server(httpserver) {
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return new Promise(resolve => {
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httpserver.stop(resolve);
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});
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}
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async function background_reval_promise() {
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return new Promise(resolve => {
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Services.obs.addObserver(resolve, "http-on-background-revalidation");
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});
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}
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add_task(async function() {
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let httpserver = new HttpServer();
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httpserver.registerPathHandler("/testdir", test_handler);
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httpserver.start(-1);
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const PORT = httpserver.identity.primaryPort;
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const URI = `http://localhost:${PORT}/testdir`;
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let response;
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version = 1;
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max_age = 1;
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response = await get_response(make_channel(URI), false);
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ok(response == generate_response(1), "got response ver 1");
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await sleep(max_age + 1);
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// must specifically wait for the internal channel to finish the reval to make
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// the test race-free.
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let reval_done = background_reval_promise();
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version = 2;
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max_age = 100;
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response = await get_response(make_channel(URI), true);
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ok(response == generate_response(1), "got response ver 1");
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await reval_done;
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response = await get_response(make_channel(URI), true);
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ok(response == generate_response(2), "got response ver 2");
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await stop_server(httpserver);
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});
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