playwright/tests/config/testserver/index.ts
2023-05-25 15:11:16 -07:00

298 lines
11 KiB
TypeScript

/**
* Copyright 2017 Google Inc. All rights reserved.
* Modifications copyright (c) Microsoft Corporation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import fs from 'fs';
import http from 'http';
import https from 'https';
import mime from 'mime';
import type net from 'net';
import path from 'path';
import url from 'url';
import util from 'util';
import ws from 'ws';
import zlib, { gzip } from 'zlib';
const fulfillSymbol = Symbol('fullfil callback');
const rejectSymbol = Symbol('reject callback');
const gzipAsync = util.promisify(gzip.bind(zlib));
export class TestServer {
private _server: http.Server;
private _wsServer: ws.WebSocketServer;
private _dirPath: string;
readonly debugServer: any;
private _startTime: Date;
private _cachedPathPrefix: string | null;
private _sockets = new Set<net.Socket>();
private _routes = new Map<string, (arg0: http.IncomingMessage, arg1: http.ServerResponse) => any>();
private _auths = new Map<string, { username: string; password: string; }>();
private _csp = new Map<string, string>();
private _extraHeaders = new Map<string, object>();
private _gzipRoutes = new Set<string>();
private _requestSubscribers = new Map<string, Promise<any>>();
readonly PORT: number;
readonly PREFIX: string;
readonly CROSS_PROCESS_PREFIX: string;
readonly EMPTY_PAGE: string;
static async create(dirPath: string, port: number, loopback?: string): Promise<TestServer> {
const server = new TestServer(dirPath, port, loopback);
await new Promise(x => server._server.once('listening', x));
return server;
}
static async createHTTPS(dirPath: string, port: number, loopback?: string): Promise<TestServer> {
const server = new TestServer(dirPath, port, loopback, {
key: await fs.promises.readFile(path.join(__dirname, 'key.pem')),
cert: await fs.promises.readFile(path.join(__dirname, 'cert.pem')),
passphrase: 'aaaa',
});
await new Promise(x => server._server.once('listening', x));
return server;
}
constructor(dirPath: string, port: number, loopback?: string, sslOptions?: object) {
if (sslOptions)
this._server = https.createServer(sslOptions, this._onRequest.bind(this));
else
this._server = http.createServer(this._onRequest.bind(this));
this._server.on('connection', socket => this._onSocket(socket));
this._wsServer = new ws.WebSocketServer({ noServer: true });
this._server.on('upgrade', async (request, socket, head) => {
const pathname = url.parse(request.url!).path;
if (pathname === '/ws-401') {
socket.write('HTTP/1.1 401 Unauthorized\r\n\r\nUnauthorized body');
socket.destroy();
return;
}
if (pathname === '/ws-slow')
await new Promise(f => setTimeout(f, 2000));
if (!['/ws', '/ws-slow'].includes(pathname)) {
socket.write('HTTP/1.1 400 Bad Request\r\n\r\n');
socket.destroy();
return;
}
this._wsServer.handleUpgrade(request, socket, head, ws => {
// Next emit is only for our internal 'connection' listeners.
this._wsServer.emit('connection', ws, request);
});
});
this._server.listen(port);
this._dirPath = dirPath;
this.debugServer = require('debug')('pw:testserver');
this._startTime = new Date();
this._cachedPathPrefix = null;
const cross_origin = loopback || '127.0.0.1';
const same_origin = loopback || 'localhost';
const protocol = sslOptions ? 'https' : 'http';
this.PORT = port;
this.PREFIX = `${protocol}://${same_origin}:${port}`;
this.CROSS_PROCESS_PREFIX = `${protocol}://${cross_origin}:${port}`;
this.EMPTY_PAGE = `${protocol}://${same_origin}:${port}/empty.html`;
}
_onSocket(socket: net.Socket) {
this._sockets.add(socket);
// ECONNRESET and HPE_INVALID_EOF_STATE are legit errors given
// that tab closing aborts outgoing connections to the server.
socket.on('error', error => {
if ((error as any).code !== 'ECONNRESET' && (error as any).code !== 'HPE_INVALID_EOF_STATE')
throw error;
});
socket.once('close', () => this._sockets.delete(socket));
}
enableHTTPCache(pathPrefix: string) {
this._cachedPathPrefix = pathPrefix;
}
setAuth(path: string, username: string, password: string) {
this.debugServer(`set auth for ${path} to ${username}:${password}`);
this._auths.set(path, { username, password });
}
enableGzip(path: string) {
this._gzipRoutes.add(path);
}
setCSP(path: string, csp: string) {
this._csp.set(path, csp);
}
setExtraHeaders(path: string, object: Record<string, string>) {
this._extraHeaders.set(path, object);
}
async stop() {
this.reset();
for (const socket of this._sockets)
socket.destroy();
this._sockets.clear();
await new Promise(x => this._server.close(x));
}
setRoute(path: string, handler: (arg0: http.IncomingMessage & { postBody: Promise<Buffer> }, arg1: http.ServerResponse) => any) {
this._routes.set(path, handler);
}
setRedirect(from: string, to: string) {
this.setRoute(from, (req, res) => {
const headers = this._extraHeaders.get(req.url!) || {};
res.writeHead(302, { ...headers, location: to });
res.end();
});
}
waitForRequest(path: string): Promise<http.IncomingMessage & { postBody: Promise<Buffer> }> {
let promise = this._requestSubscribers.get(path);
if (promise)
return promise;
let fulfill, reject;
promise = new Promise((f, r) => {
fulfill = f;
reject = r;
});
promise[fulfillSymbol] = fulfill;
promise[rejectSymbol] = reject;
this._requestSubscribers.set(path, promise);
return promise;
}
reset() {
this._routes.clear();
this._auths.clear();
this._csp.clear();
this._extraHeaders.clear();
this._gzipRoutes.clear();
const error = new Error('Static Server has been reset');
for (const subscriber of this._requestSubscribers.values())
subscriber[rejectSymbol].call(null, error);
this._requestSubscribers.clear();
}
_onRequest(request: http.IncomingMessage, response: http.ServerResponse) {
request.on('error', error => {
if ((error as any).code === 'ECONNRESET')
response.end();
else
throw error;
});
(request as any).postBody = new Promise(resolve => {
const chunks: Buffer[] = [];
request.on('data', chunk => {
chunks.push(chunk);
});
request.on('end', () => resolve(Buffer.concat(chunks)));
});
const path = url.parse(request.url!).path;
this.debugServer(`request ${request.method} ${path}`);
if (this._auths.has(path)) {
const auth = this._auths.get(path)!;
const credentials = Buffer.from((request.headers.authorization || '').split(' ')[1] || '', 'base64').toString();
this.debugServer(`request credentials ${credentials}`);
this.debugServer(`actual credentials ${auth.username}:${auth.password}`);
if (credentials !== `${auth.username}:${auth.password}`) {
this.debugServer(`request write www-auth`);
response.writeHead(401, { 'WWW-Authenticate': 'Basic realm="Secure Area"' });
response.end('HTTP Error 401 Unauthorized: Access is denied');
return;
}
}
// Notify request subscriber.
if (this._requestSubscribers.has(path)) {
this._requestSubscribers.get(path)![fulfillSymbol].call(null, request);
this._requestSubscribers.delete(path);
}
const handler = this._routes.get(path);
if (handler)
handler.call(null, request, response);
else
this.serveFile(request, response);
}
async serveFile(request: http.IncomingMessage, response: http.ServerResponse, filePath?: string) {
let pathName = url.parse(request.url!).path;
if (!filePath) {
if (pathName === '/')
pathName = '/index.html';
filePath = path.join(this._dirPath, pathName.substring(1));
}
if (this._cachedPathPrefix !== null && filePath.startsWith(this._cachedPathPrefix)) {
if (request.headers['if-modified-since']) {
response.statusCode = 304; // not modified
response.end();
return;
}
response.setHeader('Cache-Control', 'public, max-age=31536000, no-cache');
response.setHeader('Last-Modified', this._startTime.toISOString());
} else {
response.setHeader('Cache-Control', 'no-cache, no-store');
}
if (this._csp.has(pathName))
response.setHeader('Content-Security-Policy', this._csp.get(pathName)!);
if (this._extraHeaders.has(pathName)) {
const object = this._extraHeaders.get(pathName);
for (const key in object)
response.setHeader(key, object[key]);
}
const { err, data } = await fs.promises.readFile(filePath).then(data => ({ data, err: undefined })).catch(err => ({ data: undefined, err }));
// The HTTP transaction might be already terminated after async hop here - do nothing in this case.
if (response.writableEnded)
return;
if (err) {
response.statusCode = 404;
response.setHeader('Content-Type', 'text/plain');
response.end(`File not found: ${filePath}`);
return;
}
const extension = filePath.substring(filePath.lastIndexOf('.') + 1);
const mimeType = mime.getType(extension) || 'application/octet-stream';
const isTextEncoding = /^text\/|^application\/(javascript|json)/.test(mimeType);
const contentType = isTextEncoding ? `${mimeType}; charset=utf-8` : mimeType;
response.setHeader('Content-Type', contentType);
if (this._gzipRoutes.has(pathName)) {
response.setHeader('Content-Encoding', 'gzip');
const result = await gzipAsync(data);
// The HTTP transaction might be already terminated after async hop here.
if (!response.writableEnded)
response.end(result);
} else {
response.end(data);
}
}
onceWebSocketConnection(handler: (socket: ws.WebSocket, request: http.IncomingMessage) => void) {
this._wsServer.once('connection', handler);
}
waitForWebSocketConnectionRequest() {
return new Promise<http.IncomingMessage & { headers: http.IncomingHttpHeaders }>(fullfil => {
this._wsServer.once('connection', (ws, req) => fullfil(req));
});
}
sendOnWebSocketConnection(data) {
this.onceWebSocketConnection(ws => ws.send(data));
}
}