angular cli 反向代理實現跨域

版本：

 1、後端實現跨域（php）

header("Access-Control-Allow-Origin: *");
// // 響應類型
// header('Access-Control-Allow-Methods:POST');
// // 響應頭設置
// header('Access-Control-Allow-Headers:x-requested-with, content-type');

2、前端跨域 

項目目錄下新建proxy.config.json文件

 proxy.config.json

{
  "/api": {  
    "target": "http://localhost",    // php服務路徑
    "logLevel": "debug",  
    "changeOrigin": true, 
    "pathRewrite": { 
      "^/api": ""
    }
  }
}

package.json

{
  "name": "web",
  "version": "0.0.0",
  "scripts": {
    "ng": "ng",
    "start": "ng serve --proxy-config proxy.config.json --open",   // 修改
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "^8.0.0",
    "@angular/cdk": "^8.0.0",
    "@angular/common": "~8.0.0",
    "@angular/compiler": "~8.0.0",
    "@angular/core": "~8.0.0",
    "@angular/forms": "~8.0.0",
    "@angular/material": "^8.0.0",
    "@angular/platform-browser": "~8.0.0",
    "@angular/platform-browser-dynamic": "~8.0.0",
    "@angular/router": "~8.0.0",
    "@types/echarts": "^4.4.1",
    "@types/jquery": "^3.3.29",
    "chart.js": "^2.8.0",
    "crypto": "^1.0.1",
    "echarts": "^4.4.0",
    "express": "^4.17.1",
    "font-awesome": "^4.7.0",
    "jquery": "^3.4.1",
    "mysql": "^2.17.1",
    "ngx-echarts": "^4.2.1",
    "primeflex": "^1.0.0",
    "primeicons": "^1.0.0",
    "primeng": "^7.1.3",
    "rxjs": "~6.4.0",
    "tslib": "^1.9.0",
    "zone.js": "~0.9.1"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.800.0",
    "@angular/cli": "~8.0.1",
    "@angular/compiler-cli": "~8.0.0",
    "@angular/language-service": "~8.0.0",
    "@types/jasmine": "^3.3.16",
    "@types/jasminewd2": "~2.0.3",
    "@types/node": "^8.10.59",
    "codelyzer": "^5.0.0",
    "jasmine-core": "~3.4.0",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~4.1.0",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "~2.0.1",
    "karma-jasmine": "~2.0.1",
    "karma-jasmine-html-reporter": "^1.4.0",
    "node-mysql": "^0.4.2",
    "protractor": "~5.4.0",
    "ts-node": "~7.0.0",
    "tslint": "~5.15.0",
    "typescript": "~3.4.3"
  }
}

啟動使用 npm start

訪問使用 http:localhost:4200/api  就會映射到http:localhost

this.http.post('http://localhost:4200/api', {name: this.name, company: this.company, price: this.price }, {
        headers: {
          'Content-Type': 'application/json'
        }
      }).subscribe((res: any) => {
        if (res.resultCode == 200) {

        }
        // 載入成功之後做一些事
      }, (err: any) => {
      });