Question

我想在电子应用程序中公开REST服务，我想将expressJS与电子一起使用，因为教程声明我添加了express和@ types / express。我试图暴露一个“获取”，但是当我构建并运行它时会抛出以下内容。

使用ng build --prod

ERROR in ./node_modules/cookie-signature/index.js
Module not found: Error: Can't resolve 'crypto' in 'app\node_modules\cookie-signature'
ERROR in ./node_modules/etag/index.js
Module not found: Error: Can't resolve 'crypto' in 'app\node_modules\etag'
ERROR in ./node_modules/destroy/index.js
Module not found: Error: Can't resolve 'fs' in 'app\node_modules\destroy'
ERROR in ./node_modules/etag/index.js
Module not found: Error: Can't resolve 'fs' in 'app\node_modules\etag'
ERROR in ./node_modules/express/lib/view.js
Module not found: Error: Can't resolve 'fs' in 'app\node_modules\express\lib'
ERROR in ./node_modules/mime/mime.js
Module not found: Error: Can't resolve 'fs' in 'app\node_modules\mime'
ERROR in ./node_modules/send/index.js
Module not found: Error: Can't resolve 'fs' in 'app\node_modules\send'
ERROR in ./node_modules/express/lib/application.js
Module not found: Error: Can't resolve 'http' in 'app\node_modules\express\lib'
ERROR in ./node_modules/express/lib/response.js
Module not found: Error: Can't resolve 'http' in 'app\node_modules\express\lib'
ERROR in ./node_modules/express/lib/request.js
Module not found: Error: Can't resolve 'http' in 'app\node_modules\express\lib'
ERROR in ./node_modules/express/lib/request.js
Module not found: Error: Can't resolve 'net' in 'app\node_modules\express\lib'
ERROR in ./node_modules/content-disposition/index.js
Module not found: Error: Can't resolve 'path' in 'app\node_modules\content-disposition'
ERROR in ./node_modules/express/lib/view.js
Module not found: Error: Can't resolve 'path' in 'app\node_modules\express\lib'
ERROR in ./node_modules/express/lib/response.js
Module not found: Error: Can't resolve 'path' in 'app\node_modules\express\lib'
ERROR in ./node_modules/express/lib/application.js
Module not found: Error: Can't resolve 'path' in 'app\node_modules\express\lib'
ERROR in ./node_modules/mime/mime.js
Module not found: Error: Can't resolve 'path' in 'app\node_modules\mime'
ERROR in ./node_modules/mime-types/index.js
Module not found: Error: Can't resolve 'path' in 'app\node_modules\mime-types'
ERROR in ./node_modules/send/index.js
Module not found: Error: Can't resolve 'path' in 'app\node_modules\send'
ERROR in ./node_modules/serve-static/index.js
Module not found: Error: Can't resolve 'path' in 'app\node_modules\serve-static'
ERROR in ./node_modules/destroy/index.js
Module not found: Error: Can't resolve 'stream' in 'app\node_modules\destroy'
ERROR in ./node_modules/iconv-lite/lib/streams.js
Module not found: Error: Can't resolve 'stream' in 'app\node_modules\iconv-lite\lib'
ERROR in ./node_modules/iconv-lite/lib/extend-node.js
Module not found: Error: Can't resolve 'stream' in 'app\node_modules\iconv-lite\lib'
ERROR in ./node_modules/send/index.js
Module not found: Error: Can't resolve 'stream' in 'app\node_modules\send'
ERROR in ./node_modules/body-parser/lib/read.js
Module not found: Error: Can't resolve 'zlib' in 'app\node_modules\body-parser\lib'

这是我第一次想做这种事情，如果我不知道什么，请原谅我......

package.json：

> {
  "name": "angular-electron",
  "version": "0.0.0",
  "main": "main.js",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e",
    "electron": "electron .",
    "electron-build": "ng build --prod && electron ."
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "^6.0.4",
    "@angular/common": "^6.0.4",
    "@angular/compiler": "^6.0.4",
    "@angular/core": "^6.0.4",
    "@angular/forms": "^6.0.4",
    "@angular/http": "^6.0.4",
    "@angular/platform-browser": "^6.0.4",
    "@angular/platform-browser-dynamic": "^6.0.4",
    "@angular/router": "^6.0.4",
    "@types/express": "^4.16.0",
    "angular-svg-round-progressbar": "^2.0.0",
    "core-js": "^2.5.4",
    "express": "^4.16.3",
    "js-sha256": "^0.9.0",
    "rxjs": "^6.2.0",
    "rxjs-compat": "^6.2.0",
    "zone.js": "^0.8.26"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.6.6",
    "@angular/cli": "~6.0.7",
    "@angular/compiler-cli": "^6.0.4",
    "@angular/language-service": "^6.0.4",
    "@types/jasmine": "~2.8.6",
    "@types/jasminewd2": "~2.0.3",
    "@types/node": "~8.9.4",
    "codelyzer": "~4.2.1",
    "electron": "^2.0.2",
    "jasmine-core": "~2.99.1",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~1.7.1",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "~2.0.0",
    "karma-jasmine": "~1.1.1",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.3.0",
    "ts-node": "~5.0.1",
    "tslint": "~5.9.1",
    "typescript": "~2.7.2"
  }
}

该项目完美无缺，直到我添加了快速部分，它才有效。

  var app = express()

  app.get('/', function (req, res) {
    res.send('Hello World')
  })

Answer 1

我尝试了互联网上所有可用的解决方案，但实际上没有任何效果。我的项目使用的是 angular Universal ，并且可以在服务器端呈现应用程序。突然有一天早上，我开始收到此错误，我的项目没有运行。浏览器：{ “ fs”：错误 } 有人建议的解决方法。那甚至没有用。我花了整整一天的时间。我开始分析旧代码，发现我没有在package.json上添加任何内容，因此它不可能是任何其他依赖项。当我发现错在哪里时，那真是愚蠢。我不小心从组件中的 express 导入了 Router

出什么事了

import { Router } from 'express';

应该是什么

import { Router } from '@angular/router';

Answer 2

您的解决方案中现在有2个应用程序：

1）客户端应用程序：在浏览器环境中运行的angular

2）服务器应用程序：express在节点环境中运行

构建角度应用程序（使用ng build）时，必须确保不在角度构建中包含快速应用程序文件。 express使用的节点模块在浏览器环境中不可用。

你可以这样做：

1）将快速源从src文件夹移出到项目根目录

// server.js
var express = require('express');
var app = express();

app.use(express.static('dist')); // or where the output of the ng-build is placed

app.listen(3000, function() { console.log('Server running on port 3000'); });

2）运行ng-build

3）从项目根目录运行node server.js。这将继续运行

4）转到localhost:3000并查看您的应用

使用快递时未找到的模块

2 个答案: