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/* 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 {classes: Cc, interfaces: Ci, Constructor: CC} = Components;
const BinaryInputStream = CC("@mozilla.org/binaryinputstream;1",
"nsIBinaryInputStream",
"setInputStream");
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("YANDEX-SERVER-MOCK: " + msg + "\n");
}
const statusCodes = {
400: "Bad Request",
401: "Invalid API key",
402: "This API key has been blocked",
403: "Daily limit for requests reached",
404: "Daily limit for chars reached",
413: "The text size exceeds the maximum",
422: "The text could not be translated",
500: "Internal Server Error",
501: "The specified translation direction is not supported",
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);
}
// Based on the code borrowed from:
// http://stackoverflow.com/questions/901115/how-can-i-get-query-string-values-in-javascript
function parseQuery(query) {
let match,
params = {},
pl = /\+/g,
search = /([^&=]+)=?([^&]*)/g,
decode = function (s) { return decodeURIComponent(s.replace(pl, " ")); };
while (match = search.exec(query)) {
let k = decode(match[1]),
v = decode(match[2]);
if (k in params) {
if(params[k] instanceof Array)
params[k].push(v);
else
params[k] = [params[k], v];
} else {
params[k] = v;
}
}
return params;
}
function sha1(str) {
let converter = Cc["@mozilla.org/intl/scriptableunicodeconverter"]
.createInstance(Ci.nsIScriptableUnicodeConverter);
converter.charset = "UTF-8";
// `result` is an out parameter, `result.value` will contain the array length.
let result = {};
// `data` is an array of bytes.
let data = converter.convertToByteArray(str, result);
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 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 getInputStream(path) {
let file = Cc["@mozilla.org/file/directory_service;1"]
.getService(Ci.nsIProperties)
.get("CurWorkD", Ci.nsILocalFile);
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;
}
/**
* Yandex Requests have to be signed with an API Key. This mock server
* supports the following keys:
*
* yandexValidKey Always passes the authentication,
* yandexInvalidKey Never passes authentication and fails with 401 code,
* yandexBlockedKey Never passes authentication and fails with 402 code,
* yandexOutOfRequestsKey Never passes authentication and fails with 403 code,
* yandexOutOfCharsKey Never passes authentication and fails with 404 code.
*
* If any other key is used the server reponds with 401 error code.
*/
function checkAuth(params) {
if(!("key" in params))
throw new HTTPError(400);
let key = params.key;
if(key === "yandexValidKey")
return true;
let invalidKeys = {
"yandexInvalidKey" : 401,
"yandexBlockedKey" : 402,
"yandexOutOfRequestsKey" : 403,
"yandexOutOfCharsKey" : 404,
};
if(key in invalidKeys)
throw new HTTPError(invalidKeys[key]);
throw new HTTPError(401);
}
function reallyHandleRequest(req, res) {
try {
// Preparing the query parameters.
let params = {};
if(req.method == 'POST') {
params = parseQuery(getRequestBody(req));
}
// Extracting the API key and attempting to authenticate the request.
log(JSON.stringify(params));
checkAuth(params);
methodHandlers['translate'](res, params);
} catch (ex) {
sendError(res, ex, ex.code);
}
}
const methodHandlers = {
translate: function(res, params) {
res.setStatusLine("1.1", 200, "OK");
res.setHeader("Content-Type", "application/json");
let hash = sha1(JSON.stringify(params)).substr(0, 10);
log("SHA1 hash of content: " + hash);
let fixture = "browser/browser/components/translation/test/fixtures/result-yandex-" + hash + ".json";
log("PATH: " + fixture);
let inputStream = getInputStream(fixture);
res.bodyOutputStream.writeFrom(inputStream, inputStream.available());
inputStream.close();
}
};
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