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const { classes: Cc, interfaces: Ci, utils: Cu, results: Cr, Constructor: CC } = Components;
Cu.import("resource://gre/modules/Timer.jsm");
const LocalFile = CC("@mozilla.org/file/local;1", "nsILocalFile",
"initWithPath");
const FileInputStream = CC("@mozilla.org/network/file-input-stream;1",
"nsIFileInputStream", "init");
const BinaryInputStream = CC("@mozilla.org/binaryinputstream;1",
"nsIBinaryInputStream", "setInputStream");
function handleRequest(request, response) {
let params = parseQueryString(request.queryString);
response.setStatusLine(request.httpVersion, 200, "OK");
// Compare and increment a cookie for this request. This is used to test
// private browsing mode; the cookie should not be set if the image is
// loaded anonymously.
if (params.has("c")) {
let expectedValue = parseInt(params.get("c"), 10);
let actualValue = !request.hasHeader("Cookie") ? 0 :
parseInt(request.getHeader("Cookie")
.replace(/^counter=(\d+)/, "$1"), 10);
if (actualValue != expectedValue) {
response.setStatusLine(request.httpVersion, 400, "Wrong counter value");
return;
}
response.setHeader("Set-Cookie", `counter=${expectedValue + 1}`, false);
}
// Wait to send the image if a timeout is given.
let timeout = parseInt(params.get("t"), 10);
if (timeout > 0) {
response.processAsync();
setTimeout(() => {
respond(params, request, response);
response.finish();
}, timeout * 1000);
return;
}
respond(params, request, response);
}
function parseQueryString(queryString) {
return queryString.split("&").reduce((params, param) => {
let [key, value] = param.split("=", 2);
params.set(key, value);
return params;
}, new Map());
}
function respond(params, request, response) {
if (params.has("s")) {
let statusCode = parseInt(params.get("s"), 10);
response.setStatusLine(request.httpVersion, statusCode, "Custom status");
return;
}
var filename = params.get("f");
writeFile(filename, response);
}
function writeFile(name, response) {
var file = new LocalFile(getState("__LOCATION__")).parent;
file.append(name);
let mimeType = Cc["@mozilla.org/uriloader/external-helper-app-service;1"]
.getService(Ci.nsIMIMEService)
.getTypeFromFile(file);
let fileStream = new FileInputStream(file, 1, 0, false);
let binaryStream = new BinaryInputStream(fileStream);
response.setHeader("Content-Type", mimeType, false);
response.bodyOutputStream.writeFrom(binaryStream, binaryStream.available());
binaryStream.close();
fileStream.close();
}
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