AngularJS POST失败：飞行前响应具有无效的HTTP状态代码404

Question

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，它应该返回数据：

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);

    }); 

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？