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/*
Tests the Cache-control: stale-while-revalidate response directive.
Purpose is to check we DON'T perform the background revalidation when we make the
request past the reval window.
* Make request #1.
- response is from the server and version=1
- max-age=1, stale-while-revalidate=1
* Switch version of the data on the server.
* Make request #2 in 3 seconds (entry should be expired by that time and no longer
fall into the reval window.)
- response is from the server, version=2
* Done.
*/
"use strict";
const { HttpServer } = ChromeUtils.importESModule(
"resource://testing-common/httpd.sys.mjs"
);
let max_age;
let version;
let generate_response = ver => `response version=${ver}`;
function test_handler(metadata, response) {
const originalBody = generate_response(version);
response.setHeader("Content-Type", "text/html", false);
response.setHeader(
"Cache-control",
`max-age=${max_age}, stale-while-revalidate=1`,
false
);
response.setStatusLine(metadata.httpVersion, 200, "OK");
response.bodyOutputStream.write(originalBody, originalBody.length);
}
function make_channel(url) {
return NetUtil.newChannel({
uri: url,
loadUsingSystemPrincipal: true,
}).QueryInterface(Ci.nsIHttpChannel);
}
async function get_response(channel, fromCache) {
return new Promise(resolve => {
channel.asyncOpen(
new ChannelListener((request, buffer, ctx, isFromCache) => {
Assert.equal(
fromCache,
isFromCache,
`got response from cache = ${fromCache}`
);
resolve(buffer);
})
);
});
}
async function sleep(time) {
return new Promise(resolve => {
do_timeout(time * 1000, resolve);
});
}
async function stop_server(httpserver) {
return new Promise(resolve => {
httpserver.stop(resolve);
});
}
add_task(async function () {
let httpserver = new HttpServer();
httpserver.registerPathHandler("/testdir", test_handler);
httpserver.start(-1);
const PORT = httpserver.identity.primaryPort;
const URI = `http://localhost:${PORT}/testdir`;
let response;
version = 1;
max_age = 1;
response = await get_response(make_channel(URI), false);
Assert.equal(response, generate_response(1), "got response ver 1");
await sleep(max_age + 1 /* stale window */ + 1 /* to expire the window */);
version = 2;
response = await get_response(make_channel(URI), false);
Assert.equal(response, generate_response(2), "got response ver 2");
await stop_server(httpserver);
});
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