AngularJS POST失败:飞行前响应具有无效的HTTP状态代码404
我知道有很多这样的问题,但是我所见的问题都没有解决。我已经使用了至少3个微框架。所有这些都无法执行简单的POST,它应该将数据返回:
angularJS客户端:
var app = angular.module('client', []);app.config(function ($httpProvider) {
//uncommenting the following line makes GET requests fail as well
//$httpProvider.defaults.headers.common['Access-Control-Allow-Headers'] = '*';
delete $httpProvider.defaults.headers.common['X-Requested-With'];
});
app.controller('MainCtrl', function($scope, $http) {
var baseUrl = 'http://localhost:8080/server.php'
$scope.response = 'Response goes here';
$scope.sendRequest = function() {
$http({
method: 'GET',
url: baseUrl + '/get'
}).then(function successCallback(response) {
$scope.response = response.data.response;
}, function errorCallback(response) { });
};
$scope.sendPost = function() {
$http.post(baseUrl + '/post', {post: 'data from client', withCredentials: true })
.success(function(data, status, headers, config) {
console.log(status);
})
.error(function(data, status, headers, config) {
console.log('FAILED');
});
}
});
SlimPHP服务器:
<?php require 'vendor/autoload.php';
$app = new \Slim\Slim();
$app->response()->headers->set('Access-Control-Allow-Headers', 'Content-Type');
$app->response()->headers->set('Content-Type', 'application/json');
$app->response()->headers->set('Access-Control-Allow-Methods', 'GET, POST, OPTIONS');
$app->response()->headers->set('Access-Control-Allow-Origin', '*');
$array = ["response" => "Hello World!"];
$app->get('/get', function() use($array) {
$app = \Slim\Slim::getInstance();
$app->response->setStatus(200);
echo json_encode($array);
});
$app->post('/post', function() {
$app = \Slim\Slim::getInstance();
$allPostVars = $app->request->post();
$dataFromClient = $allPostVars['post'];
$app->response->setStatus(200);
echo json_encode($dataFromClient);
});
$app->run();
我已启用CORS,并且GET请求有效。html使用服务器发送的JSON内容进行更新。但是我得到了
XMLHttpRequest无法加载 http:// localhost:8080 / server.php /
post。飞行前的响应具有无效的HTTP状态代码404
每次我尝试使用POST时。为什么?
编辑:根据Pointy的要求
回答:
好的,这就是我的解决方法。这都与CORS政策有关。在发布POST请求之前,Chrome正在执行预检OPTIONS请求,服务器应在实际请求之前对其进行处理和确认。现在,这真的不是我想要的那样简单的服务器。因此,重置标头客户端可以防止预检:
app.config(function ($httpProvider) { $httpProvider.defaults.headers.common = {};
$httpProvider.defaults.headers.post = {};
$httpProvider.defaults.headers.put = {};
$httpProvider.defaults.headers.patch = {};
});
浏览器现在将直接发送POST。希望这对很多人有帮助…我的真正问题是对CORS的了解不足。
链接到一个很好的解释:http :
//www.html5rocks.com/en/tutorials/cors/
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