我已经使用 Node/Express 创建了一个小型 API,并尝试使用 Angularjs 提取数据,但是由于我的 html 页面在 localhost:8888 上的 apache 下运行并且节点 API 在端口 3000 上侦听,所以我得到了 No ‘Access-Control- 允许来源’。我尝试使用 node-http-proxy和 Vhosts Apache 但没有太多成功,请参阅下面的完整错误和代码。
node-http-proxy
XMLHttpRequest 无法加载 localhost:3000。请求的资源上不存在“Access-Control-Allow- Origin”标头。因此,不允许访问 Origin ‘localhost:8888’。”
// Api Using Node/Express var express = require('express'); var app = express(); var contractors = [ { "id": "1", "name": "Joe Blogg", "Weeks": 3, "Photo": "1.png" } ]; app.use(express.bodyParser()); app.get('/', function(req, res) { res.json(contractors); }); app.listen(process.env.PORT || 3000); console.log('Server is running on Port 3000')
angular.module('contractorsApp', []) .controller('ContractorsCtrl', function($scope, $http,$routeParams) { $http.get('localhost:3000').then(function(response) { var data = response.data; $scope.contractors = data; })
<body ng-app="contractorsApp"> <div ng-controller="ContractorsCtrl"> <ul> <li ng-repeat="person in contractors">{{person.name}}</li> </ul> </div> </body>
尝试将以下中间件添加到您的 NodeJS/Express 应用程序中(为了您的方便,我添加了一些注释):
// Add headers before the routes are defined app.use(function (req, res, next) { // Website you wish to allow to connect res.setHeader('Access-Control-Allow-Origin', 'http://localhost:8888'); // Request methods you wish to allow res.setHeader('Access-Control-Allow-Methods', 'GET, POST, OPTIONS, PUT, PATCH, DELETE'); // Request headers you wish to allow res.setHeader('Access-Control-Allow-Headers', 'X-Requested-With,content-type'); // Set to true if you need the website to include cookies in the requests sent // to the API (e.g. in case you use sessions) res.setHeader('Access-Control-Allow-Credentials', true); // Pass to next layer of middleware next(); });
希望有帮助!