dist/lib/net.js.map

{
  "version": 3,
  "sources": ["../../lib/net.ts"],
  "sourcesContent": ["/**\n * Net - abstraction layer around Node's HTTP/S request system.\n * Advantages:\n * - easier acquiring of data\n * - mass disabling of outgoing requests via Config.\n */\n\nimport * as https from 'https';\nimport * as http from 'http';\nimport * as url from 'url';\nimport * as Streams from './streams';\ndeclare const Config: any;\n\nexport interface PostData {\n\t[key: string]: string | number;\n}\nexport interface NetRequestOptions extends https.RequestOptions {\n\tbody?: string | PostData;\n\twritable?: boolean;\n\tquery?: PostData;\n}\n\nexport class HttpError extends Error {\n\tstatusCode?: number;\n\tbody: string;\n\tconstructor(message: string, statusCode: number | undefined, body: string) {\n\t\tsuper(message);\n\t\tthis.name = 'HttpError';\n\t\tthis.statusCode = statusCode;\n\t\tthis.body = body;\n\t\tError.captureStackTrace(this, HttpError);\n\t}\n}\n\nexport class NetStream extends Streams.ReadWriteStream {\n\topts: NetRequestOptions | null;\n\turi: string;\n\trequest: http.ClientRequest;\n\t/** will be a Promise before the response is received, and the response itself after */\n\tresponse: Promise<http.IncomingMessage | null> | http.IncomingMessage | null;\n\tstatusCode: number | null;\n\t/** response headers */\n\theaders: http.IncomingHttpHeaders | null;\n\tstate: 'pending' | 'open' | 'timeout' | 'success' | 'error';\n\n\tconstructor(uri: string, opts: NetRequestOptions | null = null) {\n\t\tsuper();\n\t\tthis.statusCode = null;\n\t\tthis.headers = null;\n\t\tthis.uri = uri;\n\t\tthis.opts = opts;\n\t\t// make request\n\t\tthis.response = null;\n\t\tthis.state = 'pending';\n\t\tthis.request = this.makeRequest(opts);\n\t}\n\tmakeRequest(opts: NetRequestOptions | null) {\n\t\tif (!opts) opts = {};\n\t\tlet body = opts.body;\n\t\tif (body && typeof body !== 'string') {\n\t\t\tif (!opts.headers) opts.headers = {};\n\t\t\tif (!opts.headers['Content-Type']) {\n\t\t\t\topts.headers['Content-Type'] = 'application/x-www-form-urlencoded';\n\t\t\t}\n\t\t\tbody = NetStream.encodeQuery(body);\n\t\t}\n\n\t\tif (opts.query) {\n\t\t\tthis.uri += (this.uri.includes('?') ? '&' : '?') + NetStream.encodeQuery(opts.query);\n\t\t}\n\n\t\tif (body) {\n\t\t\tif (!opts.headers) opts.headers = {};\n\t\t\tif (!opts.headers['Content-Length']) {\n\t\t\t\topts.headers['Content-Length'] = Buffer.byteLength(body);\n\t\t\t}\n\t\t}\n\n\t\tconst protocol = url.parse(this.uri).protocol;\n\t\tconst net = protocol === 'https:' ? https : http;\n\n\t\tlet resolveResponse: ((value: http.IncomingMessage | null) => void) | null;\n\t\tthis.response = new Promise(resolve => {\n\t\t\tresolveResponse = resolve;\n\t\t});\n\n\t\tconst request = net.request(this.uri, opts, response => {\n\t\t\tthis.state = 'open';\n\t\t\tthis.nodeReadableStream = response;\n\t\t\tthis.response = response;\n\t\t\tthis.statusCode = response.statusCode || null;\n\t\t\tthis.headers = response.headers;\n\n\t\t\tresponse.setEncoding('utf-8');\n\t\t\tresolveResponse!(response);\n\t\t\tresolveResponse = null;\n\n\t\t\tresponse.on('data', data => {\n\t\t\t\tthis.push(data);\n\t\t\t});\n\t\t\tresponse.on('end', () => {\n\t\t\t\tif (this.state === 'open') this.state = 'success';\n\t\t\t\tif (!this.atEOF) this.pushEnd();\n\t\t\t});\n\t\t});\n\t\trequest.on('close', () => {\n\t\t\tif (!this.atEOF) {\n\t\t\t\tthis.state = 'error';\n\t\t\t\tthis.pushError(new Error(\"Unexpected connection close\"));\n\t\t\t}\n\t\t\tif (resolveResponse) {\n\t\t\t\tthis.response = null;\n\t\t\t\tresolveResponse(null);\n\t\t\t\tresolveResponse = null;\n\t\t\t}\n\t\t});\n\t\trequest.on('error', error => {\n\t\t\tif (!this.atEOF) this.pushError(error, true);\n\t\t});\n\t\tif (opts.timeout || opts.timeout === undefined) {\n\t\t\trequest.setTimeout(opts.timeout || 5000, () => {\n\t\t\t\tthis.state = 'timeout';\n\t\t\t\tthis.pushError(new Error(\"Request timeout\"));\n\t\t\t\trequest.abort();\n\t\t\t});\n\t\t}\n\n\t\tif (body) {\n\t\t\trequest.write(body);\n\t\t\trequest.end();\n\t\t\tif (opts.writable) {\n\t\t\t\tthrow new Error(`options.body is what you would have written to a NetStream - you must choose one or the other`);\n\t\t\t}\n\t\t} else if (opts.writable) {\n\t\t\tthis.nodeWritableStream = request;\n\t\t} else {\n\t\t\trequest.end();\n\t\t}\n\n\t\treturn request;\n\t}\n\tstatic encodeQuery(data: PostData) {\n\t\tlet out = '';\n\t\tfor (const key in data) {\n\t\t\tif (out) out += `&`;\n\t\t\tout += `${key}=${encodeURIComponent(`${data[key]}`)}`;\n\t\t}\n\t\treturn out;\n\t}\n\t_write(data: string | Buffer): Promise<void> | void {\n\t\tif (!this.nodeWritableStream) {\n\t\t\tthrow new Error(\"You must specify opts.writable to write to a request.\");\n\t\t}\n\t\tconst result = this.nodeWritableStream.write(data);\n\t\tif (result !== false) return undefined;\n\t\tif (!this.drainListeners.length) {\n\t\t\tthis.nodeWritableStream.once('drain', () => {\n\t\t\t\tfor (const listener of this.drainListeners) listener();\n\t\t\t\tthis.drainListeners = [];\n\t\t\t});\n\t\t}\n\t\treturn new Promise(resolve => {\n\t\t\tthis.drainListeners.push(resolve);\n\t\t});\n\t}\n\t_read() {\n\t\tthis.nodeReadableStream?.resume();\n\t}\n\t_pause() {\n\t\tthis.nodeReadableStream?.pause();\n\t}\n}\nexport class NetRequest {\n\turi: string;\n\t/** Response from last request, made so response stuff is available without being hacky */\n\tresponse?: http.IncomingMessage;\n\tconstructor(uri: string) {\n\t\tthis.uri = uri;\n\t}\n\t/**\n\t * Makes a http/https get request to the given link and returns a stream.\n\t * The request data itself can be read with ReadStream#readAll().\n\t * The NetStream class also holds headers and statusCode as a property.\n\t *\n\t * @param opts request opts - headers, etc.\n\t * @param body POST body\n\t */\n\tgetStream(opts: NetRequestOptions = {}) {\n\t\tif (typeof Config !== 'undefined' && Config.noNetRequests) {\n\t\t\tthrow new Error(`Net requests are disabled.`);\n\t\t}\n\t\tconst stream = new NetStream(this.uri, opts);\n\t\treturn stream;\n\t}\n\n\t/**\n\t * Makes a basic http/https request to the URI.\n\t * Returns the response data.\n\t *\n\t * Will throw if the response code isn't 200 OK.\n\t *\n\t * @param opts request opts - headers, etc.\n\t */\n\tasync get(opts: NetRequestOptions = {}): Promise<string> {\n\t\tconst stream = this.getStream(opts);\n\t\tconst response = await stream.response;\n\t\tif (response) this.response = response;\n\t\tif (response && response.statusCode !== 200) {\n\t\t\tthrow new HttpError(response.statusMessage || \"Connection error\", response.statusCode, await stream.readAll());\n\t\t}\n\t\treturn stream.readAll();\n\t}\n\n\t/**\n\t * Makes a http/https POST request to the given link.\n\t * @param opts request opts - headers, etc.\n\t * @param body POST body\n\t */\n\tpost(opts: Omit<NetRequestOptions, 'body'>, body: PostData | string): Promise<string>;\n\t/**\n\t * Makes a http/https POST request to the given link.\n\t * @param opts request opts - headers, etc.\n\t */\n\tpost(opts?: NetRequestOptions): Promise<string>;\n\tpost(opts: NetRequestOptions = {}, body?: PostData | string) {\n\t\tif (!body) body = opts.body;\n\t\treturn this.get({\n\t\t\t...opts,\n\t\t\tmethod: 'POST',\n\t\t\tbody,\n\t\t});\n\t}\n}\n\nexport const Net = Object.assign((path: string) => new NetRequest(path), {\n\tNetRequest, NetStream,\n});\n"],
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