446 lines
11 KiB
JavaScript
Vendored
446 lines
11 KiB
JavaScript
Vendored
'use strict';
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const http2 = require('http2');
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const {Writable} = require('stream');
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const {Agent, globalAgent} = require('./agent');
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const IncomingMessage = require('./incoming-message');
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const urlToOptions = require('./utils/url-to-options');
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const proxyEvents = require('./utils/proxy-events');
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const isRequestPseudoHeader = require('./utils/is-request-pseudo-header');
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const {
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ERR_INVALID_ARG_TYPE,
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ERR_INVALID_PROTOCOL,
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ERR_HTTP_HEADERS_SENT,
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ERR_INVALID_HTTP_TOKEN,
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ERR_HTTP_INVALID_HEADER_VALUE,
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ERR_INVALID_CHAR
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} = require('./utils/errors');
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const {
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HTTP2_HEADER_STATUS,
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HTTP2_HEADER_METHOD,
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HTTP2_HEADER_PATH,
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HTTP2_METHOD_CONNECT
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} = http2.constants;
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const kHeaders = Symbol('headers');
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const kOrigin = Symbol('origin');
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const kSession = Symbol('session');
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const kOptions = Symbol('options');
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const kFlushedHeaders = Symbol('flushedHeaders');
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const kJobs = Symbol('jobs');
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const isValidHttpToken = /^[\^`\-\w!#$%&*+.|~]+$/;
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const isInvalidHeaderValue = /[^\t\u0020-\u007E\u0080-\u00FF]/;
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class ClientRequest extends Writable {
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constructor(input, options, callback) {
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super({
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autoDestroy: false
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});
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const hasInput = typeof input === 'string' || input instanceof URL;
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if (hasInput) {
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input = urlToOptions(input instanceof URL ? input : new URL(input));
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}
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if (typeof options === 'function' || options === undefined) {
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// (options, callback)
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callback = options;
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options = hasInput ? input : {...input};
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} else {
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// (input, options, callback)
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options = {...input, ...options};
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}
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if (options.h2session) {
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this[kSession] = options.h2session;
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} else if (options.agent === false) {
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this.agent = new Agent({maxFreeSessions: 0});
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} else if (typeof options.agent === 'undefined' || options.agent === null) {
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if (typeof options.createConnection === 'function') {
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// This is a workaround - we don't have to create the session on our own.
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this.agent = new Agent({maxFreeSessions: 0});
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this.agent.createConnection = options.createConnection;
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} else {
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this.agent = globalAgent;
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}
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} else if (typeof options.agent.request === 'function') {
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this.agent = options.agent;
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} else {
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throw new ERR_INVALID_ARG_TYPE('options.agent', ['Agent-like Object', 'undefined', 'false'], options.agent);
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}
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if (options.protocol && options.protocol !== 'https:') {
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throw new ERR_INVALID_PROTOCOL(options.protocol, 'https:');
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}
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const port = options.port || options.defaultPort || (this.agent && this.agent.defaultPort) || 443;
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const host = options.hostname || options.host || 'localhost';
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// Don't enforce the origin via options. It may be changed in an Agent.
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delete options.hostname;
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delete options.host;
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delete options.port;
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const {timeout} = options;
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options.timeout = undefined;
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this[kHeaders] = Object.create(null);
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this[kJobs] = [];
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this.socket = null;
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this.connection = null;
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this.method = options.method || 'GET';
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this.path = options.path;
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this.res = null;
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this.aborted = false;
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this.reusedSocket = false;
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if (options.headers) {
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for (const [header, value] of Object.entries(options.headers)) {
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this.setHeader(header, value);
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}
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}
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if (options.auth && !('authorization' in this[kHeaders])) {
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this[kHeaders].authorization = 'Basic ' + Buffer.from(options.auth).toString('base64');
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}
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options.session = options.tlsSession;
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options.path = options.socketPath;
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this[kOptions] = options;
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// Clients that generate HTTP/2 requests directly SHOULD use the :authority pseudo-header field instead of the Host header field.
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if (port === 443) {
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this[kOrigin] = `https://${host}`;
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if (!(':authority' in this[kHeaders])) {
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this[kHeaders][':authority'] = host;
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}
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} else {
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this[kOrigin] = `https://${host}:${port}`;
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if (!(':authority' in this[kHeaders])) {
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this[kHeaders][':authority'] = `${host}:${port}`;
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}
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}
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if (timeout) {
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this.setTimeout(timeout);
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}
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if (callback) {
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this.once('response', callback);
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}
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this[kFlushedHeaders] = false;
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}
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get method() {
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return this[kHeaders][HTTP2_HEADER_METHOD];
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}
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set method(value) {
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if (value) {
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this[kHeaders][HTTP2_HEADER_METHOD] = value.toUpperCase();
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}
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}
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get path() {
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return this[kHeaders][HTTP2_HEADER_PATH];
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}
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set path(value) {
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if (value) {
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this[kHeaders][HTTP2_HEADER_PATH] = value;
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}
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}
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get _mustNotHaveABody() {
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return this.method === 'GET' || this.method === 'HEAD' || this.method === 'DELETE';
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}
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_write(chunk, encoding, callback) {
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// https://github.com/nodejs/node/blob/654df09ae0c5e17d1b52a900a545f0664d8c7627/lib/internal/http2/util.js#L148-L156
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if (this._mustNotHaveABody) {
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callback(new Error('The GET, HEAD and DELETE methods must NOT have a body'));
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/* istanbul ignore next: Node.js 12 throws directly */
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return;
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}
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this.flushHeaders();
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const callWrite = () => this._request.write(chunk, encoding, callback);
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if (this._request) {
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callWrite();
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} else {
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this[kJobs].push(callWrite);
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}
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}
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_final(callback) {
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if (this.destroyed) {
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return;
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}
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this.flushHeaders();
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const callEnd = () => {
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// For GET, HEAD and DELETE
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if (this._mustNotHaveABody) {
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callback();
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return;
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}
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this._request.end(callback);
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};
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if (this._request) {
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callEnd();
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} else {
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this[kJobs].push(callEnd);
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}
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}
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abort() {
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if (this.res && this.res.complete) {
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return;
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}
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if (!this.aborted) {
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process.nextTick(() => this.emit('abort'));
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}
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this.aborted = true;
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this.destroy();
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}
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_destroy(error, callback) {
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if (this.res) {
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this.res._dump();
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}
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if (this._request) {
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this._request.destroy();
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}
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callback(error);
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}
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async flushHeaders() {
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if (this[kFlushedHeaders] || this.destroyed) {
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return;
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}
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this[kFlushedHeaders] = true;
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const isConnectMethod = this.method === HTTP2_METHOD_CONNECT;
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// The real magic is here
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const onStream = stream => {
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this._request = stream;
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if (this.destroyed) {
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stream.destroy();
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return;
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}
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// Forwards `timeout`, `continue`, `close` and `error` events to this instance.
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if (!isConnectMethod) {
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proxyEvents(stream, this, ['timeout', 'continue', 'close', 'error']);
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}
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// Wait for the `finish` event. We don't want to emit the `response` event
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// before `request.end()` is called.
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const waitForEnd = fn => {
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return (...args) => {
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if (!this.writable && !this.destroyed) {
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fn(...args);
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} else {
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this.once('finish', () => {
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fn(...args);
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});
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}
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};
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};
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// This event tells we are ready to listen for the data.
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stream.once('response', waitForEnd((headers, flags, rawHeaders) => {
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// If we were to emit raw request stream, it would be as fast as the native approach.
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// Note that wrapping the raw stream in a Proxy instance won't improve the performance (already tested it).
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const response = new IncomingMessage(this.socket, stream.readableHighWaterMark);
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this.res = response;
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response.req = this;
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response.statusCode = headers[HTTP2_HEADER_STATUS];
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response.headers = headers;
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response.rawHeaders = rawHeaders;
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response.once('end', () => {
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if (this.aborted) {
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response.aborted = true;
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response.emit('aborted');
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} else {
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response.complete = true;
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// Has no effect, just be consistent with the Node.js behavior
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response.socket = null;
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response.connection = null;
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}
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});
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if (isConnectMethod) {
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response.upgrade = true;
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// The HTTP1 API says the socket is detached here,
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// but we can't do that so we pass the original HTTP2 request.
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if (this.emit('connect', response, stream, Buffer.alloc(0))) {
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this.emit('close');
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} else {
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// No listeners attached, destroy the original request.
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stream.destroy();
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}
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} else {
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// Forwards data
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stream.on('data', chunk => {
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if (!response._dumped && !response.push(chunk)) {
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stream.pause();
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}
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});
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stream.once('end', () => {
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response.push(null);
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});
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if (!this.emit('response', response)) {
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// No listeners attached, dump the response.
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response._dump();
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}
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}
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}));
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// Emits `information` event
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stream.once('headers', waitForEnd(
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headers => this.emit('information', {statusCode: headers[HTTP2_HEADER_STATUS]})
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));
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stream.once('trailers', waitForEnd((trailers, flags, rawTrailers) => {
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const {res} = this;
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// Assigns trailers to the response object.
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res.trailers = trailers;
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res.rawTrailers = rawTrailers;
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}));
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const {socket} = stream.session;
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this.socket = socket;
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this.connection = socket;
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for (const job of this[kJobs]) {
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job();
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}
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this.emit('socket', this.socket);
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};
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// Makes a HTTP2 request
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if (this[kSession]) {
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try {
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onStream(this[kSession].request(this[kHeaders]));
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} catch (error) {
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this.emit('error', error);
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}
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} else {
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this.reusedSocket = true;
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try {
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onStream(await this.agent.request(this[kOrigin], this[kOptions], this[kHeaders]));
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} catch (error) {
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this.emit('error', error);
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}
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}
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}
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getHeader(name) {
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if (typeof name !== 'string') {
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throw new ERR_INVALID_ARG_TYPE('name', 'string', name);
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}
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return this[kHeaders][name.toLowerCase()];
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}
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get headersSent() {
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return this[kFlushedHeaders];
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}
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removeHeader(name) {
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if (typeof name !== 'string') {
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throw new ERR_INVALID_ARG_TYPE('name', 'string', name);
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}
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if (this.headersSent) {
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throw new ERR_HTTP_HEADERS_SENT('remove');
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}
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delete this[kHeaders][name.toLowerCase()];
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}
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setHeader(name, value) {
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if (this.headersSent) {
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throw new ERR_HTTP_HEADERS_SENT('set');
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}
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if (typeof name !== 'string' || (!isValidHttpToken.test(name) && !isRequestPseudoHeader(name))) {
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throw new ERR_INVALID_HTTP_TOKEN('Header name', name);
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}
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if (typeof value === 'undefined') {
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throw new ERR_HTTP_INVALID_HEADER_VALUE(value, name);
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}
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if (isInvalidHeaderValue.test(value)) {
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throw new ERR_INVALID_CHAR('header content', name);
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}
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this[kHeaders][name.toLowerCase()] = value;
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}
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setNoDelay() {
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// HTTP2 sockets cannot be malformed, do nothing.
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}
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setSocketKeepAlive() {
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// HTTP2 sockets cannot be malformed, do nothing.
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}
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setTimeout(ms, callback) {
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const applyTimeout = () => this._request.setTimeout(ms, callback);
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if (this._request) {
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applyTimeout();
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} else {
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this[kJobs].push(applyTimeout);
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}
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return this;
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}
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get maxHeadersCount() {
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if (!this.destroyed && this._request) {
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return this._request.session.localSettings.maxHeaderListSize;
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}
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return undefined;
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}
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set maxHeadersCount(_value) {
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// Updating HTTP2 settings would affect all requests, do nothing.
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}
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}
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module.exports = ClientRequest;
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