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'use strict';
/**
* Construct a URL which, when followed, will trigger redirection through zero
* or more specified origins and ultimately resolve in the Python handler
* `record-headers.py`.
*
* @param {string} key - the WPT server "stash" name where the request's
* headers should be stored
* @param {string[]} [origins] - zero or more origin names through which the
* request should pass; see the function
* implementation for a completel list of names
* and corresponding origins; If specified, the
* final origin will be used to access the
* `record-headers.py` hander.
* @param {object} [params] - a collection of key-value pairs to include as
* URL "search" parameters in the final request to
* `record-headers.py`
*
* @returns {string} an absolute URL
*/
function makeRequestURL(key, origins, params) {
const byName = {
};
const redirectPath = '/fetch/api/resources/redirect.py?location=';
const path = '/fetch/metadata/resources/record-headers.py?key=' + key;
let requestUrl = path;
if (params) {
requestUrl += '&' + new URLSearchParams(params).toString();
}
if (origins && origins.length) {
requestUrl = byName[origins.pop()] + requestUrl;
while (origins.length) {
requestUrl = byName[origins.pop()] + redirectPath +
encodeURIComponent(requestUrl);
}
} else {
requestUrl = byName.httpsOrigin + requestUrl;
}
return requestUrl;
}
function retrieve(key, options) {
return fetch('/fetch/metadata/resources/record-headers.py?retrieve&key=' + key)
.then((response) => {
if (response.status === 204 && options && options.poll) {
return new Promise((resolve) => setTimeout(resolve, 300))
.then(() => retrieve(key, options));
}
if (response.status !== 200) {
throw new Error('Failed to query for recorded headers.');
}
return response.text().then((text) => JSON.parse(text));
});
}