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/* Any copyright is dedicated to the Public Domain.
http://creativecommons.org/publicdomain/zero/1.0/ */
"use strict";
function handleRequest(request, response) {
const params = new Map(
request.queryString
.replace("?", "")
.split("&")
.map(s => s.split("="))
);
if (!params.has("corsErrorCategory")) {
response.setStatusLine(request.httpVersion, 200, "Och Aye");
setCacheHeaders(response);
response.setHeader("Access-Control-Allow-Origin", "*", false);
response.setHeader("Access-Control-Allow-Headers", "content-type", false);
response.setHeader("Content-Type", "text/plain; charset=utf-8", false);
response.write("Access-Control-Allow-Origin: *");
return;
}
const category = params.get("corsErrorCategory");
switch (category) {
case "CORSDidNotSucceed":
corsDidNotSucceed(request, response);
break;
case "CORSExternalRedirectNotAllowed":
corsExternalRedirectNotAllowed(request, response);
break;
case "CORSMissingAllowOrigin":
corsMissingAllowOrigin(request, response);
break;
case "CORSMultipleAllowOriginNotAllowed":
corsMultipleOriginNotAllowed(request, response);
break;
case "CORSAllowOriginNotMatchingOrigin":
corsAllowOriginNotMatchingOrigin(request, response);
break;
case "CORSNotSupportingCredentials":
corsNotSupportingCredentials(request, response);
break;
case "CORSMethodNotFound":
corsMethodNotFound(request, response);
break;
case "CORSMissingAllowCredentials":
corsMissingAllowCredentials(request, response);
break;
case "CORSPreflightDidNotSucceed":
corsPreflightDidNotSucceed(request, response);
break;
case "CORSInvalidAllowMethod":
corsInvalidAllowMethod(request, response);
break;
case "CORSInvalidAllowHeader":
corsInvalidAllowHeader(request, response);
break;
case "CORSMissingAllowHeaderFromPreflight":
corsMissingAllowHeaderFromPreflight(request, response);
break;
}
}
function corsDidNotSucceed(request, response) {
setCacheHeaders(response);
response.setStatusLine(request.httpVersion, 301, "Moved Permanently");
response.setHeader("Location", "http://example.com");
}
function corsExternalRedirectNotAllowed(request, response) {
response.setStatusLine(request.httpVersion, 301, "Moved Permanently");
response.setHeader("Access-Control-Allow-Origin", "*", false);
response.setHeader("Access-Control-Allow-Headers", "content-type", false);
response.setHeader("Location", "http://redirect.test/");
}
function corsMissingAllowOrigin(request, response) {
setCacheHeaders(response);
response.setStatusLine(request.httpVersion, 200, "corsMissingAllowOrigin");
}
function corsMultipleOriginNotAllowed(request, response) {
// We can't set the same header twice with response.setHeader, so we need to seizePower
// and write the response manually.
response.seizePower();
response.write("HTTP/1.0 200 OK\r\n");
response.write("Content-Type: text/plain\r\n");
response.write("Access-Control-Allow-Origin: *\r\n");
response.write("Access-Control-Allow-Origin: mochi.test\r\n");
response.write("\r\n");
response.finish();
setCacheHeaders(response);
}
function corsAllowOriginNotMatchingOrigin(request, response) {
response.setStatusLine(
request.httpVersion,
200,
"corsAllowOriginNotMatchingOrigin"
);
response.setHeader("Access-Control-Allow-Origin", "mochi.test");
}
function corsNotSupportingCredentials(request, response) {
response.setStatusLine(
request.httpVersion,
200,
"corsNotSupportingCredentials"
);
response.setHeader("Access-Control-Allow-Origin", "*");
}
function corsMethodNotFound(request, response) {
response.setStatusLine(request.httpVersion, 200, "corsMethodNotFound");
response.setHeader("Access-Control-Allow-Origin", "*");
// Will make the request fail since it is a "PUT".
response.setHeader("Access-Control-Allow-Methods", "POST");
}
function corsMissingAllowCredentials(request, response) {
response.setStatusLine(
request.httpVersion,
200,
"corsMissingAllowCredentials"
);
// Need to set an explicit origin (i.e. not "*") to make the request fail.
response.setHeader("Access-Control-Allow-Origin", "http://example.com");
}
function corsPreflightDidNotSucceed(request, response) {
const isPreflight = request.method == "OPTIONS";
if (isPreflight) {
response.setStatusLine(request.httpVersion, 500, "Preflight fail");
response.setHeader("Access-Control-Allow-Origin", "*");
}
}
function corsInvalidAllowMethod(request, response) {
response.setStatusLine(request.httpVersion, 200, "corsInvalidAllowMethod");
response.setHeader("Access-Control-Allow-Origin", "*");
response.setHeader("Access-Control-Allow-Methods", "xyz;");
}
function corsInvalidAllowHeader(request, response) {
response.setStatusLine(request.httpVersion, 200, "corsInvalidAllowHeader");
response.setHeader("Access-Control-Allow-Origin", "*");
response.setHeader("Access-Control-Allow-Methods", "PUT");
response.setHeader("Access-Control-Allow-Headers", "xyz;");
}
function corsMissingAllowHeaderFromPreflight(request, response) {
response.setStatusLine(
request.httpVersion,
200,
"corsMissingAllowHeaderFromPreflight"
);
response.setHeader("Access-Control-Allow-Origin", "*");
response.setHeader("Access-Control-Allow-Methods", "PUT");
}
function setCacheHeaders(response) {
response.setHeader("Cache-Control", "no-cache, no-store, must-revalidate");
response.setHeader("Pragma", "no-cache");
response.setHeader("Expires", "0");
}
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