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// stolen from file_blocked_script.sjs
function setGlobalState(data, key) {
x = {
data,
QueryInterface(iid) {
return this;
},
};
x.wrappedJSObject = x;
setObjectState(key, x);
}
function getGlobalState(key) {
var data;
getObjectState(key, function (x) {
data = x && x.wrappedJSObject.data;
});
return data;
}
function completeBlockingRequest(response) {
response.write("42");
response.finish();
}
// This stores the response that's currently blocking, or true if the release
// got here before the blocking request.
const BLOCKING_KEY = "multie10s-update-release";
// This tracks the number of blocking requests we received up to this point in
// time. This value will be cleared when fetched. It's on the caller to make
// sure that all the blocking requests that might occurr have already occurred.
const COUNT_KEY = "multie10s-update-count";
/**
* Serve a request that will only be completed when the ?release variant of this
* .sjs is fetched. This allows us to avoid using a timer, which slows down the
* tests and is brittle under slow hardware.
*/
function handleBlockingRequest(request, response) {
response.processAsync();
response.setHeader("Content-Type", "application/javascript", false);
const existingCount = getGlobalState(COUNT_KEY) || 0;
setGlobalState(existingCount + 1, COUNT_KEY);
const alreadyReleased = getGlobalState(BLOCKING_KEY);
if (alreadyReleased === true) {
completeBlockingRequest(response);
setGlobalState(null, BLOCKING_KEY);
} else if (alreadyReleased) {
// If we've got another response stacked up, this means something is wrong
// with the test. The count mechanism will detect this, so just let this
// one through so we fail fast rather than hanging.
dump("we got multiple blocking requests stacked up!!\n");
completeBlockingRequest(response);
} else {
setGlobalState(response, BLOCKING_KEY);
}
}
function handleReleaseRequest(request, response) {
const blockingResponse = getGlobalState(BLOCKING_KEY);
if (blockingResponse) {
completeBlockingRequest(blockingResponse);
setGlobalState(null, BLOCKING_KEY);
} else {
setGlobalState(true, BLOCKING_KEY);
}
response.setHeader("Content-Type", "application/json", false);
response.write(JSON.stringify({ released: true }));
}
function handleCountRequest(request, response) {
const count = getGlobalState(COUNT_KEY) || 0;
// --verify requires that we clear this so the test can be re-run.
setGlobalState(0, COUNT_KEY);
response.setHeader("Content-Type", "application/json", false);
response.write(JSON.stringify({ count }));
}
function handleRequest(request, response) {
dump(
"server_multie10s_update.sjs: processing request for " +
request.path +
"?" +
request.queryString +
"\n"
);
const query = new URLSearchParams(request.queryString);
if (query.has("release")) {
handleReleaseRequest(request, response);
} else if (query.has("get-and-clear-count")) {
handleCountRequest(request, response);
} else {
handleBlockingRequest(request, response);
}
}
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