小编典典

没有“Access-Control-Allow-Origin” - 节点/Apache 端口问题

all

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。

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')

角码

angular.module('contractorsApp', [])
.controller('ContractorsCtrl', function($scope, $http,$routeParams) {

   $http.get('localhost:3000').then(function(response) {
       var data = response.data;
       $scope.contractors = data;
   })

HTML

<body ng-app="contractorsApp">
    <div ng-controller="ContractorsCtrl"> 
        <ul>
            <li ng-repeat="person in contractors">{{person.name}}</li>
        </ul>
    </div>
</body>

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2022-04-11

共1个答案

小编典典

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!

2022-04-11