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vscode-react-native/src/debugger

src/debugger/scriptImporter.ts

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1// Copyright (c) Microsoft Corporation. All rights reserved.
2// Licensed under the MIT license. See LICENSE file in the project root for details.
3
4import {FileSystem} from "../common/node/fileSystem";
5import { logger } from "vscode-chrome-debug-core";
6import { ensurePackagerRunning } from "../common/packagerStatus";
7import path = require("path");
8import Q = require("q");
9import {Request} from "../common/node/request";
10import {SourceMapUtil} from "./sourceMap";
11import url = require("url");
12import * as semver from "semver";
13import {ReactNativeProjectHelper} from "../common/reactNativeProjectHelper";
14
15export interface DownloadedScript {
16 contents: string;
17 filepath: string;
18}
19
20interface IStrictUrl extends url.Url {
21 pathname: string;
22 href: string;
23}
24
25export class ScriptImporter {
26 public static DEBUGGER_WORKER_FILE_BASENAME = "debuggerWorker";
27 public static DEBUGGER_WORKER_FILENAME = ScriptImporter.DEBUGGER_WORKER_FILE_BASENAME + ".js";
28 private packagerAddress: string;
29 private packagerPort: number;
30 private sourcesStoragePath: string;
31 private packagerRemoteRoot?: string;
32 private packagerLocalRoot?: string;
33 private sourceMapUtil: SourceMapUtil;
34
35 constructor(packagerAddress: string, packagerPort: number, sourcesStoragePath: string, packagerRemoteRoot?: string, packagerLocalRoot?: string) {
36 this.packagerAddress = packagerAddress;
37 this.packagerPort = packagerPort;
38 this.sourcesStoragePath = sourcesStoragePath;
39 this.packagerRemoteRoot = packagerRemoteRoot;
40 this.packagerLocalRoot = packagerLocalRoot;
41 this.sourceMapUtil = new SourceMapUtil();
42 }
43
44 public downloadAppScript(scriptUrlString: string): Q.Promise<DownloadedScript> {
45 const parsedScriptUrl = url.parse(scriptUrlString);
46 const overriddenScriptUrlString = (parsedScriptUrl.hostname === "localhost") ? this.overridePackagerPort(scriptUrlString) : scriptUrlString;
47 // We'll get the source code, and store it locally to have a better debugging experience
48 return Request.request(overriddenScriptUrlString, true).then(scriptBody => {
49 // Extract sourceMappingURL from body
50 let scriptUrl = <IStrictUrl>url.parse(overriddenScriptUrlString); // scriptUrl = "http://localhost:8081/index.ios.bundle?platform=ios&dev=true"
51 let sourceMappingUrl = this.sourceMapUtil.getSourceMapURL(scriptUrl, scriptBody); // sourceMappingUrl = "http://localhost:8081/index.ios.map?platform=ios&dev=true"
52
53 let waitForSourceMapping = Q<void>(void 0);
54 if (sourceMappingUrl) {
55 /* handle source map - request it and store it locally */
56 waitForSourceMapping = this.writeAppSourceMap(sourceMappingUrl, scriptUrl)
57 .then(() => {
58 scriptBody = this.sourceMapUtil.updateScriptPaths(scriptBody, <IStrictUrl>sourceMappingUrl);
59 });
60 }
61
62 return waitForSourceMapping
63 .then(() => this.writeAppScript(scriptBody, scriptUrl))
64 .then((scriptFilePath: string) => {
65 logger.verbose(`Script ${overriddenScriptUrlString} downloaded to ${scriptFilePath}`);
66 return { contents: scriptBody, filepath: scriptFilePath };
67 });
68 });
69 }
70
71 public downloadDebuggerWorker(sourcesStoragePath: string, projectRootPath: string): Q.Promise<void> {
72 const errPackagerNotRunning = new RangeError(`Cannot attach to packager. Are you sure there is a packager and it is running in the port ${this.packagerPort}? If your packager is configured to run in another port make sure to add that to the setting.json.`);
73
74 return ensurePackagerRunning(this.packagerAddress, this.packagerPort, errPackagerNotRunning)
75 .then(() => {
76 return ReactNativeProjectHelper.getReactNativeVersion(projectRootPath);
77 })
78 .then((rnVersion: string) => {
79 let newPackager = "";
80 const isHaulProject = ReactNativeProjectHelper.isHaulProject(projectRootPath);
81 if (semver.gte(rnVersion, "0.50.0") && !isHaulProject) {
82 newPackager = "debugger-ui/";
83 }
84 let debuggerWorkerURL = `http://${this.packagerAddress}:${this.packagerPort}/${newPackager}${ScriptImporter.DEBUGGER_WORKER_FILENAME}`;
85 let debuggerWorkerLocalPath = path.join(sourcesStoragePath, ScriptImporter.DEBUGGER_WORKER_FILENAME);
86 logger.verbose("About to download: " + debuggerWorkerURL + " to: " + debuggerWorkerLocalPath);
87
88 return Request.request(debuggerWorkerURL, true)
89 .then((body: string) => {
90 return new FileSystem().writeFile(debuggerWorkerLocalPath, body);
91 });
92 });
93 }
94
95 /**
96 * Writes the script file to the project temporary location.
97 */
98 private writeAppScript(scriptBody: string, scriptUrl: IStrictUrl): Q.Promise<String> {
99 let scriptFilePath = path.join(this.sourcesStoragePath, path.basename(scriptUrl.pathname)); // scriptFilePath = "$TMPDIR/index.ios.bundle"
100 return new FileSystem().writeFile(scriptFilePath, scriptBody)
101 .then(() => scriptFilePath);
102 }
103
104 /**
105 * Writes the source map file to the project temporary location.
106 */
107 private writeAppSourceMap(sourceMapUrl: IStrictUrl, scriptUrl: IStrictUrl): Q.Promise<void> {
108 return Request.request(sourceMapUrl.href, true)
109 .then((sourceMapBody: string) => {
110 let sourceMappingLocalPath = path.join(this.sourcesStoragePath, path.basename(sourceMapUrl.pathname)); // sourceMappingLocalPath = "$TMPDIR/index.ios.map"
111 let scriptFileRelativePath = path.basename(scriptUrl.pathname); // scriptFileRelativePath = "index.ios.bundle"
112 let updatedContent = this.sourceMapUtil.updateSourceMapFile(sourceMapBody, scriptFileRelativePath, this.sourcesStoragePath, this.packagerRemoteRoot, this.packagerLocalRoot);
113 return new FileSystem().writeFile(sourceMappingLocalPath, updatedContent);
114 });
115 }
116
117 /**
118 * Changes the port of the url to be the one configured as this.packagerPort
119 */
120 private overridePackagerPort(urlToOverride: string): string {
121 let components = url.parse(urlToOverride);
122 components.port = this.packagerPort.toString();
123 delete components.host; // We delete the host, if not the port change will be ignored
124 return url.format(components);
125 }
126}
127