778 lines
21 KiB
JavaScript
778 lines
21 KiB
JavaScript
const WebSocket = require('websocket').w3cwebsocket;
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const fetch = require('node-fetch');
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const ProxyAgent = require('proxy-agent');
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const is = require('@sindresorhus/is');
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/* global Buffer: false */
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/* global setTimeout: false */
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/* global log: false */
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/* eslint-disable more/no-then, no-bitwise, no-nested-ternary */
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function _btoa(str) {
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let buffer;
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if (str instanceof Buffer) {
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buffer = str;
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} else {
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buffer = Buffer.from(str.toString(), 'binary');
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}
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return buffer.toString('base64');
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}
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const _call = object => Object.prototype.toString.call(object);
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const ArrayBufferToString = _call(new ArrayBuffer());
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const Uint8ArrayToString = _call(new Uint8Array());
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function _getString(thing) {
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if (typeof thing !== 'string') {
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if (_call(thing) === Uint8ArrayToString)
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return String.fromCharCode.apply(null, thing);
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if (_call(thing) === ArrayBufferToString)
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return _getString(new Uint8Array(thing));
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}
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return thing;
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}
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function _b64ToUint6(nChr) {
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return nChr > 64 && nChr < 91
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? nChr - 65
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: nChr > 96 && nChr < 123
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? nChr - 71
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: nChr > 47 && nChr < 58
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? nChr + 4
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: nChr === 43
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? 62
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: nChr === 47
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? 63
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: 0;
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}
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function _getStringable(thing) {
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return (
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typeof thing === 'string' ||
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typeof thing === 'number' ||
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typeof thing === 'boolean' ||
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(thing === Object(thing) &&
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(_call(thing) === ArrayBufferToString ||
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_call(thing) === Uint8ArrayToString))
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);
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}
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function _ensureStringed(thing) {
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if (_getStringable(thing)) {
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return _getString(thing);
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} else if (thing instanceof Array) {
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const res = [];
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for (let i = 0; i < thing.length; i += 1) {
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res[i] = _ensureStringed(thing[i]);
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}
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return res;
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} else if (thing === Object(thing)) {
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const res = {};
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// eslint-disable-next-line guard-for-in, no-restricted-syntax
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for (const key in thing) {
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res[key] = _ensureStringed(thing[key]);
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}
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return res;
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} else if (thing === null) {
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return null;
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} else if (thing === undefined) {
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return undefined;
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}
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throw new Error(`unsure of how to jsonify object of type ${typeof thing}`);
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}
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function _jsonThing(thing) {
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return JSON.stringify(_ensureStringed(thing));
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}
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function _base64ToBytes(sBase64, nBlocksSize) {
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const sB64Enc = sBase64.replace(/[^A-Za-z0-9+/]/g, '');
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const nInLen = sB64Enc.length;
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const nOutLen = nBlocksSize
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? Math.ceil(((nInLen * 3 + 1) >> 2) / nBlocksSize) * nBlocksSize
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: (nInLen * 3 + 1) >> 2;
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const aBBytes = new ArrayBuffer(nOutLen);
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const taBytes = new Uint8Array(aBBytes);
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for (
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let nMod3, nMod4, nUint24 = 0, nOutIdx = 0, nInIdx = 0;
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nInIdx < nInLen;
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nInIdx += 1
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) {
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nMod4 = nInIdx & 3;
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nUint24 |= _b64ToUint6(sB64Enc.charCodeAt(nInIdx)) << (18 - 6 * nMod4);
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if (nMod4 === 3 || nInLen - nInIdx === 1) {
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for (
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nMod3 = 0;
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nMod3 < 3 && nOutIdx < nOutLen;
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nMod3 += 1, nOutIdx += 1
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) {
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taBytes[nOutIdx] = (nUint24 >>> ((16 >>> nMod3) & 24)) & 255;
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}
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nUint24 = 0;
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}
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}
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return aBBytes;
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}
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function _validateResponse(response, schema) {
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try {
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// eslint-disable-next-line guard-for-in, no-restricted-syntax
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for (const i in schema) {
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switch (schema[i]) {
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case 'object':
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case 'string':
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case 'number':
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// eslint-disable-next-line valid-typeof
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if (typeof response[i] !== schema[i]) {
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return false;
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}
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break;
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default:
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}
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}
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} catch (ex) {
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return false;
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}
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return true;
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}
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function _createSocket(url, { certificateAuthority, proxyUrl }) {
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let requestOptions;
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if (proxyUrl) {
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requestOptions = {
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ca: certificateAuthority,
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agent: new ProxyAgent(proxyUrl),
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};
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} else {
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requestOptions = {
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ca: certificateAuthority,
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};
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}
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// eslint-disable-next-line new-cap
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return new WebSocket(url, null, null, null, requestOptions);
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}
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function _promiseAjax(providedUrl, options) {
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return new Promise((resolve, reject) => {
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const url = providedUrl || `${options.host}/${options.path}`;
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log.info(
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`${options.type} ${url}${options.unauthenticated ? ' (unauth)' : ''}`
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);
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const timeout =
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typeof options.timeout !== 'undefined' ? options.timeout : 10000;
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const { proxyUrl } = options;
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let agent;
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if (proxyUrl) {
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agent = new ProxyAgent(proxyUrl);
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}
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const fetchOptions = {
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method: options.type,
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body: options.data || null,
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headers: { 'X-Signal-Agent': 'OWD' },
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agent,
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ca: options.certificateAuthority,
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timeout,
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};
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if (fetchOptions.body instanceof ArrayBuffer) {
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// node-fetch doesn't support ArrayBuffer, only node Buffer
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const contentLength = fetchOptions.body.byteLength;
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fetchOptions.body = Buffer.from(fetchOptions.body);
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// node-fetch doesn't set content-length like S3 requires
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fetchOptions.headers['Content-Length'] = contentLength;
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}
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const { accessKey, unauthenticated } = options;
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if (unauthenticated) {
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if (!accessKey) {
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throw new Error(
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'_promiseAjax: mode is aunathenticated, but accessKey was not provided'
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);
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}
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// Access key is already a Base64 string
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fetchOptions.headers['Unidentified-Access-Key'] = accessKey;
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} else if (options.user && options.password) {
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const user = _getString(options.user);
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const password = _getString(options.password);
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const auth = _btoa(`${user}:${password}`);
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fetchOptions.headers.Authorization = `Basic ${auth}`;
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}
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if (options.contentType) {
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fetchOptions.headers['Content-Type'] = options.contentType;
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}
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fetch(url, fetchOptions)
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.then(response => {
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let resultPromise;
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if (
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options.responseType === 'json' &&
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response.headers.get('Content-Type') === 'application/json'
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) {
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resultPromise = response.json();
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} else if (options.responseType === 'arraybuffer') {
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resultPromise = response.buffer();
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} else {
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resultPromise = response.text();
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}
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return resultPromise.then(result => {
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if (options.responseType === 'arraybuffer') {
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// eslint-disable-next-line no-param-reassign
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result = result.buffer.slice(
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result.byteOffset,
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result.byteOffset + result.byteLength
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);
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}
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if (options.responseType === 'json') {
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if (options.validateResponse) {
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if (!_validateResponse(result, options.validateResponse)) {
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log.error(options.type, url, response.status, 'Error');
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reject(
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HTTPError(
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'promiseAjax: invalid response',
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response.status,
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result,
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options.stack
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)
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);
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}
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}
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}
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if (response.status >= 0 && response.status < 400) {
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log.info(options.type, url, response.status, 'Success');
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resolve(result, response.status);
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} else {
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log.error(options.type, url, response.status, 'Error');
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reject(
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HTTPError(
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'promiseAjax: error response',
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response.status,
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result,
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options.stack
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)
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);
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}
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});
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})
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.catch(e => {
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log.error(options.type, url, 0, 'Error');
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const stack = `${e.stack}\nInitial stack:\n${options.stack}`;
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reject(HTTPError('promiseAjax catch', 0, e.toString(), stack));
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});
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});
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}
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function _retryAjax(url, options, providedLimit, providedCount) {
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const count = (providedCount || 0) + 1;
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const limit = providedLimit || 3;
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return _promiseAjax(url, options).catch(e => {
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if (e.name === 'HTTPError' && e.code === -1 && count < limit) {
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return new Promise(resolve => {
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setTimeout(() => {
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resolve(_retryAjax(url, options, limit, count));
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}, 1000);
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});
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}
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throw e;
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});
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}
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function _outerAjax(url, options) {
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// eslint-disable-next-line no-param-reassign
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options.stack = new Error().stack; // just in case, save stack here.
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return _retryAjax(url, options);
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}
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function HTTPError(message, providedCode, response, stack) {
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const code = providedCode > 999 || providedCode < 100 ? -1 : providedCode;
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const e = new Error(`${message}; code: ${code}`);
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e.name = 'HTTPError';
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e.code = code;
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e.stack += `\nOriginal stack:\n${stack}`;
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if (response) {
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e.response = response;
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}
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return e;
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}
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const URL_CALLS = {
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accounts: 'v1/accounts',
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attachment: 'v1/attachments',
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deliveryCert: 'v1/certificate/delivery',
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supportUnauthenticatedDelivery: 'v1/devices/unauthenticated_delivery',
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devices: 'v1/devices',
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keys: 'v2/keys',
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messages: 'v1/messages',
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profile: 'v1/profile',
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signed: 'v2/keys/signed',
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};
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module.exports = {
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initialize,
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};
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// We first set up the data that won't change during this session of the app
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function initialize({ url, cdnUrl, certificateAuthority, proxyUrl }) {
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if (!is.string(url)) {
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throw new Error('WebAPI.initialize: Invalid server url');
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}
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if (!is.string(cdnUrl)) {
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throw new Error('WebAPI.initialize: Invalid cdnUrl');
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}
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if (!is.string(certificateAuthority)) {
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throw new Error('WebAPI.initialize: Invalid certificateAuthority');
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}
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// Thanks to function-hoisting, we can put this return statement before all of the
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// below function definitions.
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return {
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connect,
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};
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// Then we connect to the server with user-specific information. This is the only API
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// exposed to the browser context, ensuring that it can't connect to arbitrary
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// locations.
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function connect({ username: initialUsername, password: initialPassword }) {
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let username = initialUsername;
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let password = initialPassword;
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// Thanks, function hoisting!
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return {
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confirmCode,
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getAttachment,
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getAvatar,
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getDevices,
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getSenderCertificate,
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registerSupportForUnauthenticatedDelivery,
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getKeysForNumber,
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getKeysForNumberUnauth,
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getMessageSocket,
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getMyKeys,
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getProfile,
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getProfileUnauth,
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getProvisioningSocket,
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putAttachment,
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registerKeys,
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requestVerificationSMS,
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requestVerificationVoice,
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sendMessages,
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sendMessagesUnauth,
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setSignedPreKey,
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};
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function _ajax(param) {
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if (!param.urlParameters) {
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// eslint-disable-next-line no-param-reassign
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param.urlParameters = '';
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}
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return _outerAjax(null, {
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certificateAuthority,
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contentType: 'application/json; charset=utf-8',
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data: param.jsonData && _jsonThing(param.jsonData),
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host: url,
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password,
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path: URL_CALLS[param.call] + param.urlParameters,
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proxyUrl,
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responseType: param.responseType,
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timeout: param.timeout,
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type: param.httpType,
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user: username,
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validateResponse: param.validateResponse,
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unauthenticated: param.unauthenticated,
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accessKey: param.accessKey,
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}).catch(e => {
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const { code } = e;
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if (code === 200) {
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// happens sometimes when we get no response
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// (TODO: Fix server to return 204? instead)
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return null;
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}
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let message;
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switch (code) {
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case -1:
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message =
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'Failed to connect to the server, please check your network connection.';
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break;
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case 413:
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message = 'Rate limit exceeded, please try again later.';
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break;
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case 403:
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message = 'Invalid code, please try again.';
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break;
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case 417:
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// TODO: This shouldn't be a thing?, but its in the API doc?
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message = 'Number already registered.';
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break;
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case 401:
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message =
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'Invalid authentication, most likely someone re-registered and invalidated our registration.';
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break;
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case 404:
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message = 'Number is not registered.';
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break;
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default:
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message =
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'The server rejected our query, please file a bug report.';
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}
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e.message = message;
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throw e;
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});
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}
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function getSenderCertificate() {
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return _ajax({
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call: 'deliveryCert',
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httpType: 'GET',
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responseType: 'json',
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schema: { certificate: 'string' },
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});
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}
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function registerSupportForUnauthenticatedDelivery() {
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return _ajax({
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call: 'supportUnauthenticatedDelivery',
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httpType: 'PUT',
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responseType: 'json',
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});
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}
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function getProfile(number) {
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return _ajax({
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call: 'profile',
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httpType: 'GET',
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urlParameters: `/${number}`,
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responseType: 'json',
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});
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}
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function getProfileUnauth(number, { accessKey } = {}) {
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return _ajax({
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call: 'profile',
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httpType: 'GET',
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urlParameters: `/${number}`,
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responseType: 'json',
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unauthenticated: true,
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accessKey,
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});
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}
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function getAvatar(path) {
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// Using _outerAJAX, since it's not hardcoded to the Signal Server. Unlike our
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// attachment CDN, it uses our self-signed certificate, so we pass it in.
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return _outerAjax(`${cdnUrl}/${path}`, {
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certificateAuthority,
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contentType: 'application/octet-stream',
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proxyUrl,
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responseType: 'arraybuffer',
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timeout: 0,
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type: 'GET',
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});
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}
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function requestVerificationSMS(number) {
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return _ajax({
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call: 'accounts',
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httpType: 'GET',
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urlParameters: `/sms/code/${number}`,
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});
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}
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function requestVerificationVoice(number) {
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return _ajax({
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call: 'accounts',
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httpType: 'GET',
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urlParameters: `/voice/code/${number}`,
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});
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}
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async function confirmCode(
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number,
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code,
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newPassword,
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signalingKey,
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registrationId,
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deviceName,
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options = {}
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) {
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const { accessKey } = options;
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const jsonData = {
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signalingKey: _btoa(_getString(signalingKey)),
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supportsSms: false,
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fetchesMessages: true,
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registrationId,
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unidentifiedAccessKey: accessKey
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? _btoa(_getString(accessKey))
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: undefined,
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unrestrictedUnidentifiedAccess: false,
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};
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let call;
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let urlPrefix;
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let schema;
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let responseType;
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if (deviceName) {
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jsonData.name = deviceName;
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call = 'devices';
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urlPrefix = '/';
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schema = { deviceId: 'number' };
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responseType = 'json';
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} else {
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call = 'accounts';
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urlPrefix = '/code/';
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}
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// We update our saved username and password, since we're creating a new account
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username = number;
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password = newPassword;
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const response = await _ajax({
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call,
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httpType: 'PUT',
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urlParameters: urlPrefix + code,
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jsonData,
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responseType,
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validateResponse: schema,
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});
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// From here on out, our username will be our phone number combined with device
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username = `${number}.${response.deviceId || 1}`;
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return response;
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}
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function getDevices() {
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return _ajax({
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call: 'devices',
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httpType: 'GET',
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});
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}
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function registerKeys(genKeys) {
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const keys = {};
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keys.identityKey = _btoa(_getString(genKeys.identityKey));
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keys.signedPreKey = {
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keyId: genKeys.signedPreKey.keyId,
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publicKey: _btoa(_getString(genKeys.signedPreKey.publicKey)),
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signature: _btoa(_getString(genKeys.signedPreKey.signature)),
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};
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keys.preKeys = [];
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let j = 0;
|
|
// eslint-disable-next-line guard-for-in, no-restricted-syntax
|
|
for (const i in genKeys.preKeys) {
|
|
keys.preKeys[j] = {
|
|
keyId: genKeys.preKeys[i].keyId,
|
|
publicKey: _btoa(_getString(genKeys.preKeys[i].publicKey)),
|
|
};
|
|
j += 1;
|
|
}
|
|
|
|
// This is just to make the server happy
|
|
// (v2 clients should choke on publicKey)
|
|
keys.lastResortKey = { keyId: 0x7fffffff, publicKey: _btoa('42') };
|
|
|
|
return _ajax({
|
|
call: 'keys',
|
|
httpType: 'PUT',
|
|
jsonData: keys,
|
|
});
|
|
}
|
|
|
|
function setSignedPreKey(signedPreKey) {
|
|
return _ajax({
|
|
call: 'signed',
|
|
httpType: 'PUT',
|
|
jsonData: {
|
|
keyId: signedPreKey.keyId,
|
|
publicKey: _btoa(_getString(signedPreKey.publicKey)),
|
|
signature: _btoa(_getString(signedPreKey.signature)),
|
|
},
|
|
});
|
|
}
|
|
|
|
function getMyKeys() {
|
|
return _ajax({
|
|
call: 'keys',
|
|
httpType: 'GET',
|
|
responseType: 'json',
|
|
validateResponse: { count: 'number' },
|
|
}).then(res => res.count);
|
|
}
|
|
|
|
function handleKeys(res) {
|
|
if (!Array.isArray(res.devices)) {
|
|
throw new Error('Invalid response');
|
|
}
|
|
res.identityKey = _base64ToBytes(res.identityKey);
|
|
res.devices.forEach(device => {
|
|
if (
|
|
!_validateResponse(device, { signedPreKey: 'object' }) ||
|
|
!_validateResponse(device.signedPreKey, {
|
|
publicKey: 'string',
|
|
signature: 'string',
|
|
})
|
|
) {
|
|
throw new Error('Invalid signedPreKey');
|
|
}
|
|
if (device.preKey) {
|
|
if (
|
|
!_validateResponse(device, { preKey: 'object' }) ||
|
|
!_validateResponse(device.preKey, { publicKey: 'string' })
|
|
) {
|
|
throw new Error('Invalid preKey');
|
|
}
|
|
// eslint-disable-next-line no-param-reassign
|
|
device.preKey.publicKey = _base64ToBytes(device.preKey.publicKey);
|
|
}
|
|
// eslint-disable-next-line no-param-reassign
|
|
device.signedPreKey.publicKey = _base64ToBytes(
|
|
device.signedPreKey.publicKey
|
|
);
|
|
// eslint-disable-next-line no-param-reassign
|
|
device.signedPreKey.signature = _base64ToBytes(
|
|
device.signedPreKey.signature
|
|
);
|
|
});
|
|
return res;
|
|
}
|
|
|
|
function getKeysForNumber(number, deviceId = '*') {
|
|
return _ajax({
|
|
call: 'keys',
|
|
httpType: 'GET',
|
|
urlParameters: `/${number}/${deviceId}`,
|
|
responseType: 'json',
|
|
validateResponse: { identityKey: 'string', devices: 'object' },
|
|
}).then(handleKeys);
|
|
}
|
|
|
|
function getKeysForNumberUnauth(
|
|
number,
|
|
deviceId = '*',
|
|
{ accessKey } = {}
|
|
) {
|
|
return _ajax({
|
|
call: 'keys',
|
|
httpType: 'GET',
|
|
urlParameters: `/${number}/${deviceId}`,
|
|
responseType: 'json',
|
|
validateResponse: { identityKey: 'string', devices: 'object' },
|
|
unauthenticated: true,
|
|
accessKey,
|
|
}).then(handleKeys);
|
|
}
|
|
|
|
function sendMessagesUnauth(
|
|
destination,
|
|
messageArray,
|
|
timestamp,
|
|
silent,
|
|
{ accessKey } = {}
|
|
) {
|
|
const jsonData = { messages: messageArray, timestamp };
|
|
|
|
if (silent) {
|
|
jsonData.silent = true;
|
|
}
|
|
|
|
return _ajax({
|
|
call: 'messages',
|
|
httpType: 'PUT',
|
|
urlParameters: `/${destination}`,
|
|
jsonData,
|
|
responseType: 'json',
|
|
unauthenticated: true,
|
|
accessKey,
|
|
});
|
|
}
|
|
|
|
function sendMessages(destination, messageArray, timestamp, silent) {
|
|
const jsonData = { messages: messageArray, timestamp };
|
|
|
|
if (silent) {
|
|
jsonData.silent = true;
|
|
}
|
|
|
|
return _ajax({
|
|
call: 'messages',
|
|
httpType: 'PUT',
|
|
urlParameters: `/${destination}`,
|
|
jsonData,
|
|
responseType: 'json',
|
|
});
|
|
}
|
|
|
|
function getAttachment(id) {
|
|
return _ajax({
|
|
call: 'attachment',
|
|
httpType: 'GET',
|
|
urlParameters: `/${id}`,
|
|
responseType: 'json',
|
|
validateResponse: { location: 'string' },
|
|
}).then(response =>
|
|
// Using _outerAJAX, since it's not hardcoded to the Signal Server
|
|
_outerAjax(response.location, {
|
|
contentType: 'application/octet-stream',
|
|
proxyUrl,
|
|
responseType: 'arraybuffer',
|
|
timeout: 0,
|
|
type: 'GET',
|
|
})
|
|
);
|
|
}
|
|
|
|
function putAttachment(encryptedBin) {
|
|
return _ajax({
|
|
call: 'attachment',
|
|
httpType: 'GET',
|
|
responseType: 'json',
|
|
}).then(response =>
|
|
// Using _outerAJAX, since it's not hardcoded to the Signal Server
|
|
_outerAjax(response.location, {
|
|
contentType: 'application/octet-stream',
|
|
data: encryptedBin,
|
|
processData: false,
|
|
proxyUrl,
|
|
timeout: 0,
|
|
type: 'PUT',
|
|
}).then(() => response.idString)
|
|
);
|
|
}
|
|
|
|
function getMessageSocket() {
|
|
log.info('opening message socket', url);
|
|
const fixedScheme = url
|
|
.replace('https://', 'wss://')
|
|
.replace('http://', 'ws://');
|
|
const login = encodeURIComponent(username);
|
|
const pass = encodeURIComponent(password);
|
|
|
|
return _createSocket(
|
|
`${fixedScheme}/v1/websocket/?login=${login}&password=${pass}&agent=OWD`,
|
|
{ certificateAuthority, proxyUrl }
|
|
);
|
|
}
|
|
|
|
function getProvisioningSocket() {
|
|
log.info('opening provisioning socket', url);
|
|
const fixedScheme = url
|
|
.replace('https://', 'wss://')
|
|
.replace('http://', 'ws://');
|
|
|
|
return _createSocket(
|
|
`${fixedScheme}/v1/websocket/provisioning/?agent=OWD`,
|
|
{ certificateAuthority, proxyUrl }
|
|
);
|
|
}
|
|
}
|
|
}
|