[英]CORS issue in ionic with rails
我正在尝试使用ionic
和backend作为Rails
的示例项目。 当我使用离子服务启动离子服务器并提交我的样品表格时
XMLHttpRequest cannot load http://localhost:3000/signup. Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:8100' is therefore not allowed access. The response had HTTP status code 404.
尝试了一些我在google中获得的答案,但是却找不到。 以下是我的app.js代码index.html和ionic.project文件代码。
angular.module('starter', ['ionic'])
.run(function($ionicPlatform) {
$ionicPlatform.ready(function() {
if(window.cordova && window.cordova.plugins.Keyboard) {
cordova.plugins.Keyboard.hideKeyboardAccessoryBar(true);
cordova.plugins.Keyboard.disableScroll(true);
}
if(window.StatusBar) {
StatusBar.styleDefault();
}
});
})
.constant('ApiEndpoint', 'http://localhost:3000/')
.config(function($stateProvider, $urlRouterProvider) {
$stateProvider
.state('signUp',{
cache: false,
url: "/signUp",
templateUrl: "templates/signUp.html",
controller: 'ExampleCtrl'
})
$urlRouterProvider.otherwise("/signUp");
})
.controller('ExampleCtrl', ['$scope','$http','ApiEndpoint', function ($scope, $http, ApiEndpoint) {
$scope.registrationForm = {};
$scope.signUp = function(){
console.log($scope.registrationForm);
console.log(ApiEndpoint);
$http.post(ApiEndpoint + "signup", {a: 1}).then(function(result){
console.log(result);
$scope.registrationForm = {};
}, function(error){
console.log(error);
$scope.registrationForm = {};
})
}
}])
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no, width=device-width">
<meta http-equiv="Content-Security-Policy" content="default-src *; style-src 'self' 'unsafe-inline'; script-src 'self' 'unsafe-inline' 'unsafe-eval'">
<title></title>
<link href="lib/ionic/css/ionic.css" rel="stylesheet">
<link href="css/style.css" rel="stylesheet">
<!-- IF using Sass (run gulp sass first), then uncomment below and remove the CSS includes above
<link href="css/ionic.app.css" rel="stylesheet">
-->
<!-- ionic/angularjs js -->
<script src="lib/ionic/js/ionic.bundle.js"></script>
<!-- cordova script (this will be a 404 during development) -->
<script src="cordova.js"></script>
<!-- your app's js -->
<script src="js/app.js"></script>
</head>
<body ng-app="starter" animation="slide-left-right-ios7">
<ion-pane>
<ion-nav-bar class="nav-title-slide-ios7 bar-stable">
<ion-nav-back-button></ion-nav-back-button>
</ion-nav-bar>
<ion-nav-view>
</ion-nav-view>
</ion-pane>
</body>
</html>
{
"name": "kranthi_web",
"app_id": "",
"proxies": [
{
"path": "/api",
"proxyUrl": "http:localhost:3000/"
}
]
}
有人可以告诉我我在哪里做错了吗
CORS(跨源资源共享)策略旨在防止对不同域资产的XML请求。
基本上,如果要通过XML向其他域/服务器请求资源,则需要确保在该服务器上具有相应的CORS策略来处理它。
默认情况下,Rails阻止响应任何外部XML请求。 解决该问题的唯一方法是允许您通过自己的CORS策略使用该资源。
#config/application.rb
# ...
config.middleware.insert_before 0, "Rack::Cors" do
allow do
origins '*'
resource '*', :headers => :any, :methods => [:get, :post, :options]
end
end
如果为您的域(IE本地主机或其他)设置了以上内容,则应该能够从前端JS访问后端。
...并记住,使用Angular /其他JS类型框架,您将每次都发送XML请求。
在基本控制器中,应提供Access-Control-Allow-Origin
标头。
class Api::BaseController < ActionController::Base
before_action :cors_preflight_check
after_action :cors_set_access_control_headers
protected
def cors_preflight_check
if request.method == 'OPTIONS'
headers['Access-Control-Allow-Origin'] = '*'
# ...
end
end
def cors_set_access_control_headers
headers['Access-Control-Allow-Origin'] = '*'
# ...
end
end
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