/
net.ts
553 lines (486 loc) · 17.9 KB
/
net.ts
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
import * as url from 'url';
import { Readable, Writable } from 'stream';
import { app } from 'electron/main';
import type { ClientRequestConstructorOptions, UploadProgress } from 'electron/main';
const {
isOnline,
isValidHeaderName,
isValidHeaderValue,
createURLLoader
} = process._linkedBinding('electron_browser_net');
const kSupportedProtocols = new Set(['http:', 'https:']);
// set of headers that Node.js discards duplicates for
// see https://nodejs.org/api/http.html#http_message_headers
const discardableDuplicateHeaders = new Set([
'content-type',
'content-length',
'user-agent',
'referer',
'host',
'authorization',
'proxy-authorization',
'if-modified-since',
'if-unmodified-since',
'from',
'location',
'max-forwards',
'retry-after',
'etag',
'last-modified',
'server',
'age',
'expires'
]);
class IncomingMessage extends Readable {
_shouldPush: boolean;
_data: (Buffer | null)[];
_responseHead: NodeJS.ResponseHead;
_resume: (() => void) | null;
constructor (responseHead: NodeJS.ResponseHead) {
super();
this._shouldPush = false;
this._data = [];
this._responseHead = responseHead;
this._resume = null;
}
get statusCode () {
return this._responseHead.statusCode;
}
get statusMessage () {
return this._responseHead.statusMessage;
}
get headers () {
const filteredHeaders: Record<string, string | string[]> = {};
const { rawHeaders } = this._responseHead;
rawHeaders.forEach(header => {
const keyLowerCase = header.key.toLowerCase();
if (Object.prototype.hasOwnProperty.call(filteredHeaders, keyLowerCase) &&
discardableDuplicateHeaders.has(keyLowerCase)) {
// do nothing with discardable duplicate headers
} else {
if (keyLowerCase === 'set-cookie') {
// keep set-cookie as an array per Node.js rules
// see https://nodejs.org/api/http.html#http_message_headers
if (Object.prototype.hasOwnProperty.call(filteredHeaders, keyLowerCase)) {
(filteredHeaders[keyLowerCase] as string[]).push(header.value);
} else {
filteredHeaders[keyLowerCase] = [header.value];
}
} else {
// for non-cookie headers, the values are joined together with ', '
if (Object.prototype.hasOwnProperty.call(filteredHeaders, keyLowerCase)) {
filteredHeaders[keyLowerCase] += `, ${header.value}`;
} else {
filteredHeaders[keyLowerCase] = header.value;
}
}
}
});
return filteredHeaders;
}
get rawHeaders () {
const rawHeadersArr: string[] = [];
const { rawHeaders } = this._responseHead;
rawHeaders.forEach(header => {
rawHeadersArr.push(header.key, header.value);
});
return rawHeadersArr;
}
get httpVersion () {
return `${this.httpVersionMajor}.${this.httpVersionMinor}`;
}
get httpVersionMajor () {
return this._responseHead.httpVersion.major;
}
get httpVersionMinor () {
return this._responseHead.httpVersion.minor;
}
get rawTrailers () {
throw new Error('HTTP trailers are not supported');
}
get trailers () {
throw new Error('HTTP trailers are not supported');
}
_storeInternalData (chunk: Buffer | null, resume: (() => void) | null) {
// save the network callback for use in _pushInternalData
this._resume = resume;
this._data.push(chunk);
this._pushInternalData();
}
_pushInternalData () {
while (this._shouldPush && this._data.length > 0) {
const chunk = this._data.shift();
this._shouldPush = this.push(chunk);
}
if (this._shouldPush && this._resume) {
// Reset the callback, so that a new one is used for each
// batch of throttled data. Do this before calling resume to avoid a
// potential race-condition
const resume = this._resume;
this._resume = null;
resume();
}
}
_read () {
this._shouldPush = true;
this._pushInternalData();
}
}
/** Writable stream that buffers up everything written to it. */
class SlurpStream extends Writable {
_data: Buffer;
constructor () {
super();
this._data = Buffer.alloc(0);
}
_write (chunk: Buffer, encoding: string, callback: () => void) {
this._data = Buffer.concat([this._data, chunk]);
callback();
}
data () { return this._data; }
}
class ChunkedBodyStream extends Writable {
_pendingChunk: Buffer | undefined;
_downstream?: NodeJS.DataPipe;
_pendingCallback?: (error?: Error) => void;
_clientRequest: ClientRequest;
constructor (clientRequest: ClientRequest) {
super();
this._clientRequest = clientRequest;
}
_write (chunk: Buffer, encoding: string, callback: () => void) {
if (this._downstream) {
this._downstream.write(chunk).then(callback, callback);
} else {
// the contract of _write is that we won't be called again until we call
// the callback, so we're good to just save a single chunk.
this._pendingChunk = chunk;
this._pendingCallback = callback;
// The first write to a chunked body stream begins the request.
this._clientRequest._startRequest();
}
}
_final (callback: () => void) {
this._downstream!.done();
callback();
}
startReading (pipe: NodeJS.DataPipe) {
if (this._downstream) {
throw new Error('two startReading calls???');
}
this._downstream = pipe;
if (this._pendingChunk) {
const doneWriting = (maybeError: Error | void) => {
// If the underlying request has been aborted, we honeslty don't care about the error
// all work should cease as soon as we abort anyway, this error is probably a
// "mojo pipe disconnected" error (code=9)
if (this._clientRequest._aborted) return;
const cb = this._pendingCallback!;
delete this._pendingCallback;
delete this._pendingChunk;
cb(maybeError || undefined);
};
this._downstream.write(this._pendingChunk).then(doneWriting, doneWriting);
}
}
}
type RedirectPolicy = 'manual' | 'follow' | 'error';
function parseOptions (optionsIn: ClientRequestConstructorOptions | string): NodeJS.CreateURLLoaderOptions & { redirectPolicy: RedirectPolicy, headers: Record<string, { name: string, value: string | string[] }> } {
const options: any = typeof optionsIn === 'string' ? url.parse(optionsIn) : { ...optionsIn };
let urlStr: string = options.url;
if (!urlStr) {
const urlObj: url.UrlObject = {};
const protocol = options.protocol || 'http:';
if (!kSupportedProtocols.has(protocol)) {
throw new Error('Protocol "' + protocol + '" not supported');
}
urlObj.protocol = protocol;
if (options.host) {
urlObj.host = options.host;
} else {
if (options.hostname) {
urlObj.hostname = options.hostname;
} else {
urlObj.hostname = 'localhost';
}
if (options.port) {
urlObj.port = options.port;
}
}
if (options.path && / /.test(options.path)) {
// The actual regex is more like /[^A-Za-z0-9\-._~!$&'()*+,;=/:@]/
// with an additional rule for ignoring percentage-escaped characters
// but that's a) hard to capture in a regular expression that performs
// well, and b) possibly too restrictive for real-world usage. That's
// why it only scans for spaces because those are guaranteed to create
// an invalid request.
throw new TypeError('Request path contains unescaped characters');
}
const pathObj = url.parse(options.path || '/');
urlObj.pathname = pathObj.pathname;
urlObj.search = pathObj.search;
urlObj.hash = pathObj.hash;
urlStr = url.format(urlObj);
}
const redirectPolicy = options.redirect || 'follow';
if (!['follow', 'error', 'manual'].includes(redirectPolicy)) {
throw new Error('redirect mode should be one of follow, error or manual');
}
if (options.headers != null && typeof options.headers !== 'object') {
throw new TypeError('headers must be an object');
}
const urlLoaderOptions: NodeJS.CreateURLLoaderOptions & { redirectPolicy: RedirectPolicy, headers: Record<string, { name: string, value: string | string[] }> } = {
method: (options.method || 'GET').toUpperCase(),
url: urlStr,
redirectPolicy,
headers: {},
body: null as any,
useSessionCookies: options.useSessionCookies,
credentials: options.credentials,
origin: options.origin
};
const headers: Record<string, string | string[]> = options.headers || {};
for (const [name, value] of Object.entries(headers)) {
if (!isValidHeaderName(name)) {
throw new Error(`Invalid header name: '${name}'`);
}
if (!isValidHeaderValue(value.toString())) {
throw new Error(`Invalid value for header '${name}': '${value}'`);
}
const key = name.toLowerCase();
urlLoaderOptions.headers[key] = { name, value };
}
if (options.session) {
// Weak check, but it should be enough to catch 99% of accidental misuses.
if (options.session.constructor && options.session.constructor.name === 'Session') {
urlLoaderOptions.session = options.session;
} else {
throw new TypeError('`session` should be an instance of the Session class');
}
} else if (options.partition) {
if (typeof options.partition === 'string') {
urlLoaderOptions.partition = options.partition;
} else {
throw new TypeError('`partition` should be a string');
}
}
return urlLoaderOptions;
}
export class ClientRequest extends Writable implements Electron.ClientRequest {
_started: boolean = false;
_firstWrite: boolean = false;
_aborted: boolean = false;
_chunkedEncoding: boolean | undefined;
_body: Writable | undefined;
_urlLoaderOptions: NodeJS.CreateURLLoaderOptions & { headers: Record<string, { name: string, value: string | string[] }> };
_redirectPolicy: RedirectPolicy;
_followRedirectCb?: () => void;
_uploadProgress?: { active: boolean, started: boolean, current: number, total: number };
_urlLoader?: NodeJS.URLLoader;
_response?: IncomingMessage;
constructor (options: ClientRequestConstructorOptions | string, callback?: (message: IncomingMessage) => void) {
super({ autoDestroy: true });
if (!app.isReady()) {
throw new Error('net module can only be used after app is ready');
}
if (callback) {
this.once('response', callback);
}
const { redirectPolicy, ...urlLoaderOptions } = parseOptions(options);
this._urlLoaderOptions = urlLoaderOptions;
this._redirectPolicy = redirectPolicy;
}
get chunkedEncoding () {
return this._chunkedEncoding || false;
}
set chunkedEncoding (value: boolean) {
if (this._started) {
throw new Error('chunkedEncoding can only be set before the request is started');
}
if (typeof this._chunkedEncoding !== 'undefined') {
throw new Error('chunkedEncoding can only be set once');
}
this._chunkedEncoding = !!value;
if (this._chunkedEncoding) {
this._body = new ChunkedBodyStream(this);
this._urlLoaderOptions.body = (pipe: NodeJS.DataPipe) => {
(this._body! as ChunkedBodyStream).startReading(pipe);
};
}
}
setHeader (name: string, value: string) {
if (typeof name !== 'string') {
throw new TypeError('`name` should be a string in setHeader(name, value)');
}
if (value == null) {
throw new Error('`value` required in setHeader("' + name + '", value)');
}
if (this._started || this._firstWrite) {
throw new Error('Can\'t set headers after they are sent');
}
if (!isValidHeaderName(name)) {
throw new Error(`Invalid header name: '${name}'`);
}
if (!isValidHeaderValue(value.toString())) {
throw new Error(`Invalid value for header '${name}': '${value}'`);
}
const key = name.toLowerCase();
this._urlLoaderOptions.headers[key] = { name, value };
}
getHeader (name: string) {
if (name == null) {
throw new Error('`name` is required for getHeader(name)');
}
const key = name.toLowerCase();
const header = this._urlLoaderOptions.headers[key];
return header && header.value as any;
}
removeHeader (name: string) {
if (name == null) {
throw new Error('`name` is required for removeHeader(name)');
}
if (this._started || this._firstWrite) {
throw new Error('Can\'t remove headers after they are sent');
}
const key = name.toLowerCase();
delete this._urlLoaderOptions.headers[key];
}
_write (chunk: Buffer, encoding: BufferEncoding, callback: () => void) {
this._firstWrite = true;
if (!this._body) {
this._body = new SlurpStream();
this._body.on('finish', () => {
this._urlLoaderOptions.body = (this._body as SlurpStream).data();
this._startRequest();
});
}
// TODO: is this the right way to forward to another stream?
this._body.write(chunk, encoding, callback);
}
_final (callback: () => void) {
if (this._body) {
// TODO: is this the right way to forward to another stream?
this._body.end(callback);
} else {
// end() called without a body, go ahead and start the request
this._startRequest();
callback();
}
}
_startRequest () {
this._started = true;
const stringifyValues = (obj: Record<string, { name: string, value: string | string[] }>) => {
const ret: Record<string, string> = {};
for (const k of Object.keys(obj)) {
const kv = obj[k];
ret[kv.name] = kv.value.toString();
}
return ret;
};
this._urlLoaderOptions.referrer = this.getHeader('referer') || '';
this._urlLoaderOptions.origin = this._urlLoaderOptions.origin || this.getHeader('origin') || '';
this._urlLoaderOptions.hasUserActivation = this.getHeader('sec-fetch-user') === '?1';
this._urlLoaderOptions.mode = this.getHeader('sec-fetch-mode') || '';
this._urlLoaderOptions.destination = this.getHeader('sec-fetch-dest') || '';
const opts = { ...this._urlLoaderOptions, extraHeaders: stringifyValues(this._urlLoaderOptions.headers) };
this._urlLoader = createURLLoader(opts);
this._urlLoader.on('response-started', (event, finalUrl, responseHead) => {
const response = this._response = new IncomingMessage(responseHead);
this.emit('response', response);
});
this._urlLoader.on('data', (event, data, resume) => {
this._response!._storeInternalData(Buffer.from(data), resume);
});
this._urlLoader.on('complete', () => {
if (this._response) { this._response._storeInternalData(null, null); }
});
this._urlLoader.on('error', (event, netErrorString) => {
const error = new Error(netErrorString);
if (this._response) this._response.destroy(error);
this._die(error);
});
this._urlLoader.on('login', (event, authInfo, callback) => {
const handled = this.emit('login', authInfo, callback);
if (!handled) {
// If there were no listeners, cancel the authentication request.
callback();
}
});
this._urlLoader.on('redirect', (event, redirectInfo, headers) => {
const { statusCode, newMethod, newUrl } = redirectInfo;
if (this._redirectPolicy === 'error') {
this._die(new Error('Attempted to redirect, but redirect policy was \'error\''));
} else if (this._redirectPolicy === 'manual') {
let _followRedirect = false;
this._followRedirectCb = () => { _followRedirect = true; };
try {
this.emit('redirect', statusCode, newMethod, newUrl, headers);
} finally {
this._followRedirectCb = undefined;
if (!_followRedirect && !this._aborted) {
this._die(new Error('Redirect was cancelled'));
}
}
} else if (this._redirectPolicy === 'follow') {
// Calling followRedirect() when the redirect policy is 'follow' is
// allowed but does nothing. (Perhaps it should throw an error
// though...? Since the redirect will happen regardless.)
try {
this._followRedirectCb = () => {};
this.emit('redirect', statusCode, newMethod, newUrl, headers);
} finally {
this._followRedirectCb = undefined;
}
} else {
this._die(new Error(`Unexpected redirect policy '${this._redirectPolicy}'`));
}
});
this._urlLoader.on('upload-progress', (event, position, total) => {
this._uploadProgress = { active: true, started: true, current: position, total };
this.emit('upload-progress', position, total); // Undocumented, for now
});
this._urlLoader.on('download-progress', (event, current) => {
if (this._response) {
this._response.emit('download-progress', current); // Undocumented, for now
}
});
}
followRedirect () {
if (this._followRedirectCb) {
this._followRedirectCb();
} else {
throw new Error('followRedirect() called, but was not waiting for a redirect');
}
}
abort () {
if (!this._aborted) {
process.nextTick(() => { this.emit('abort'); });
}
this._aborted = true;
this._die();
}
_die (err?: Error) {
// Node.js assumes that any stream which is ended is no longer capable of emitted events
// which is a faulty assumption for the case of an object that is acting like a stream
// (our urlRequest). If we don't emit here, this causes errors since we *do* expect
// that error events can be emitted after urlRequest.end().
if ((this as any)._writableState.destroyed && err) {
this.emit('error', err);
}
this.destroy(err);
if (this._urlLoader) {
this._urlLoader.cancel();
if (this._response) this._response.destroy(err);
}
}
getUploadProgress (): UploadProgress {
return this._uploadProgress ? { ...this._uploadProgress } : { active: false, started: false, current: 0, total: 0 };
}
}
export function request (options: ClientRequestConstructorOptions | string, callback?: (message: IncomingMessage) => void) {
return new ClientRequest(options, callback);
}
exports.isOnline = isOnline;
Object.defineProperty(exports, 'online', {
get: () => isOnline()
});