Question

我尝试使用Angular.js从HTML页面发送和接收数据，并在本地运行Node.js服务器

＆＃13;

app.controller("MainController", function MainController($scope, $http){		
	$scope.postIt = function() {
		//alert("posting...");
		$http.post('http://127.0.0.1:1337/', {msg:'hello from Angular.js!'})
		.success(function onSuccess(response){
	        console.log(response);
	        $scope.$apply(function(){
	            $scope.testData = JSON.parse(response);
	            console.log($scope.testData);
	        });
	    }).error(function onError(){
	        console.log("AJAX failed!");
	    });
    };
});

＆＃13;

<div id='content' 
     ng-app='MyTutorialApp' 
     ng-controller='MainController'>
	 <p>    
        <a ng-click="postIt()">
            Click here to load data.
        </a>
     </p>
</div>	
	<script src="bower_components/angular/angular.js" type="text/javascript"></script>
	<script src="app.js" type="text/javascript"></script>
	<script src="maincontroller.js" type="text/javascript"></script>

＆＃13;

然后我收到错误：

 XMLHttpRequest cannot load http://127.0.0.1:1337/. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'null' is therefore not allowed access.

我尝试将标头应用为app.js

var app = angular.module('MyTutorialApp', [], function($httpProvider) {
      $httpProvider.defaults.headers.post['Access-Control-Allow-Origin'] = 'http://127.0.0.1:1337/';
});

但这没有生效。

Node.js代码

var http = require('http');
http.createServer(function handler(req, res) {
    console.log(req.method, req.url, req.httpVersion, req.headers);

    res.writeHead(200, {'Content-Type': 'text/plain'});
    res.end('Hello from Node.js\n');
}).listen(1337, '127.0.0.1');
console.log('Server running at http://127.0.0.1:1337/');

Answer 1

如果你使用angular来向你的localhost node.js服务器发送ajax请求，你应该把access-control-allow-origin放在接受ajax请求的目标服务器上，即localhost，不要用ajax发布它请求。

XMLHttpRequest无法加载http://127.0.0.1:1337/。请求的资源上不存在“Access-Control-Allow-Origin”标头

1 个答案: