/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
const CC = Components.Constructor;
const BinaryInputStream = CC(
"@mozilla.org/binaryinputstream;1",
"nsIBinaryInputStream",
"setInputStream"
);
Cu.importGlobalProperties(["DOMParser", "TextEncoder"]);
function handleRequest(req, res) {
try {
reallyHandleRequest(req, res);
} catch (ex) {
res.setStatusLine("1.0", 200, "AlmostOK");
let msg = "Error handling request: " + ex + "\n" + ex.stack;
log(msg);
res.write(msg);
}
}
function log(msg) {
// dump("BING-SERVER-MOCK: " + msg + "\n");
}
const statusCodes = {
400: "Bad Request",
401: "Unauthorized",
403: "Forbidden",
404: "Not Found",
405: "Method Not Allowed",
500: "Internal Server Error",
501: "Not Implemented",
503: "Service Unavailable",
};
function HTTPError(code = 500, message) {
this.code = code;
this.name = statusCodes[code] || "HTTPError";
this.message = message || this.name;
}
HTTPError.prototype = new Error();
HTTPError.prototype.constructor = HTTPError;
function sendError(res, err) {
if (!(err instanceof HTTPError)) {
err = new HTTPError(
typeof err == "number" ? err : 500,
err.message || typeof err == "string" ? err : ""
);
}
res.setStatusLine("1.1", err.code, err.name);
res.write(err.message);
}
function parseQuery(query) {
let ret = {};
for (let param of query.replace(/^[?&]/, "").split("&")) {
param = param.split("=");
if (!param[0]) {
continue;
}
ret[unescape(param[0])] = unescape(param[1]);
}
return ret;
}
function getRequestBody(req) {
let avail;
let bytes = [];
let body = new BinaryInputStream(req.bodyInputStream);
while ((avail = body.available()) > 0) {
Array.prototype.push.apply(bytes, body.readByteArray(avail));
}
return String.fromCharCode.apply(null, bytes);
}
function sha1(str) {
// `data` is an array of bytes.
let data = new TextEncoder().encode(str);
let ch = Cc["@mozilla.org/security/hash;1"].createInstance(Ci.nsICryptoHash);
ch.init(ch.SHA1);
ch.update(data, data.length);
let hash = ch.finish(false);
// Return the two-digit hexadecimal code for a byte.
function toHexString(charCode) {
return ("0" + charCode.toString(16)).slice(-2);
}
// Convert the binary hash data to a hex string.
return Array.from(hash, (c, i) => toHexString(hash.charCodeAt(i))).join("");
}
function parseXml(body) {
let parser = new DOMParser();
let xml = parser.parseFromString(body, "text/xml");
if (xml.documentElement.localName == "parsererror") {
throw new Error("Invalid XML");
}
return xml;
}
function getInputStream(path) {
let file = Services.dirsvc.get("CurWorkD", Ci.nsIFile);
for (let part of path.split("/")) {
file.append(part);
}
let fileStream = Cc[
"@mozilla.org/network/file-input-stream;1"
].createInstance(Ci.nsIFileInputStream);
fileStream.init(file, 1, 0, false);
return fileStream;
}
function checkAuth(req) {
let err = new Error("Authorization failed");
err.code = 401;
if (!req.hasHeader("Authorization")) {
throw new HTTPError(401, "No Authorization header provided.");
}
let auth = req.getHeader("Authorization");
if (!auth.startsWith("Bearer ")) {
throw new HTTPError(
401,
"Invalid Authorization header content: '" + auth + "'"
);
}
// Rejecting inactive subscriptions.
if (auth.includes("inactive")) {
const INACTIVE_STATE_RESPONSE =
"TranslateApiException
Method: TranslateArray()
Message: The Azure Market Place Translator Subscription associated with the request credentials is not in an active state.
message id=5641.V2_Rest.TranslateArray.48CC6470
";
throw new HTTPError(401, INACTIVE_STATE_RESPONSE);
}
}
function reallyHandleRequest(req, res) {
log("method: " + req.method);
if (req.method != "POST") {
sendError(
res,
"Bing only deals with POST requests, not '" + req.method + "'."
);
return;
}
let body = getRequestBody(req);
log("body: " + body);
// First, we'll see if we're dealing with an XML body:
let contentType = req.hasHeader("Content-Type")
? req.getHeader("Content-Type")
: null;
log("contentType: " + contentType);
if (contentType.startsWith("text/xml")) {
try {
// For all these requests the client needs to supply the correct
// authentication headers.
checkAuth(req);
let xml = parseXml(body);
let method = xml.documentElement.localName;
log("invoking method: " + method);
// If the requested method is supported, delegate it to its handler.
if (methodHandlers[method]) {
methodHandlers[method](res, xml);
} else {
throw new HTTPError(501);
}
} catch (ex) {
sendError(res, ex, ex.code);
}
} else {
// Not XML, so it must be a query-string.
let params = parseQuery(body);
// Delegate an authentication request to the correct handler.
if ("grant_type" in params && params.grant_type == "client_credentials") {
methodHandlers.authenticate(res, params);
} else {
sendError(res, 501);
}
}
}
const methodHandlers = {
authenticate(res, params) {
// Validate a few required parameters.
if (params.scope != "http://api.microsofttranslator.com") {
sendError(res, "Invalid scope.");
return;
}
if (!params.client_id) {
sendError(res, "Missing client_id param.");
return;
}
if (!params.client_secret) {
sendError(res, "Missing client_secret param.");
return;
}
// Defines the tokens for certain client ids.
const TOKEN_MAP = {
testInactive: "inactive",
testClient: "test",
};
let token = "test"; // Default token.
if (params.client_id in TOKEN_MAP) {
token = TOKEN_MAP[params.client_id];
}
let content = JSON.stringify({
access_token: token,
expires_in: 600,
});
res.setStatusLine("1.1", 200, "OK");
res.setHeader("Content-Length", String(content.length));
res.setHeader("Content-Type", "application/json");
res.write(content);
},
TranslateArrayRequest(res, xml, body) {
let from = xml.querySelector("From").firstChild.nodeValue;
let to = xml.querySelector("To").firstChild.nodeValue;
log("translating from '" + from + "' to '" + to + "'");
res.setStatusLine("1.1", 200, "OK");
res.setHeader("Content-Type", "text/xml");
let hash = sha1(body).substr(0, 10);
log("SHA1 hash of content: " + hash);
let inputStream = getInputStream(
"browser/browser/components/translation/test/fixtures/result-" +
hash +
".txt"
);
res.bodyOutputStream.writeFrom(inputStream, inputStream.available());
inputStream.close();
},
};