AngularJS：如何阻止请求

是否可以使用angularjs拦截器阻止请求

$provide.factory('myHttpInterceptor', function($q, someService) {
  return {
    'request': function(config) {
      // here I'd like to cancel a request depending of some conditions
    }
  }
});

$httpProvider.interceptors.push('myHttpInterceptor');

---

在1.1.5及更高版本中，您可以使用配置对象的“timeout”属性

从：

超时–{number | Promise}–以毫秒为单位的超时，或承诺 解决后应中止请求

简单的例子：

$provide.factory('myHttpInterceptor', function($q, someService) {
  return {
    'request': function(config) {

        var canceler = $q.defer();

        config.timeout = canceler.promise;

        if (true) {

            // Canceling request
            canceler.resolve();
        }

        return config;
    }
  }
});

$httpProvider.interceptors.push('myHttpInterceptor');

---

我应用了这种逻辑，这种逻辑是有效的：

$scope.cancelRequest = 0;               // initilize taking variable
$scope.searchUser = function() {
    $scope.cancelRequest = 0;           // initilize taking variable
    var opts = {};
    $scope.userList = [];               //array in witch i store the list
    if($scope.searchFrind != ""){       // checking the value of the model is blank or their is some data
        opts.limit_size = 10; 
        ProfileService.searchUser(opts, function(data) {   // calling the service which call the http request
            if( $scope.cancelRequest == 0 ){    // checking the value of cancelRequest as if the request is late and we doesnot want it then it fall in the else case
                angular.forEach(data.data.users,function(user) {
                    $scope.userList.push(user);
                })
            }else{                          //when the cancelRequest is notequal 0 then this part run
                $scope.userList = [];       //empty the array
            }
        });
    }else{
        $scope.userList = [];
        $scope.cancelRequest = 1; //changing the value of cancelRequest to 1 so that the pending http request  after completion does not disturb the array or any model
    }
};

---

你能解释一下当（配置）时返回配置| |$q行是什么吗是什么？或者更确切地说：

config

如何计算为false？该行上方的代码假定它是有效的配置对象？您是正确的。它应该是

returnconfig

，因为

config.timeout=canceler.promiseconfig

仍然是

未定义的

，则code>将不起作用。我很草率，从旧的拦截器文档中获取了代码，其中只包含行

returnconfig | |$q.when（config）并在其上添加了一些逻辑。我会编辑它。谢谢。您仍然在发出一个实际的HTTP请求（并丢弃它的响应，导致无用的服务器负载），这不是OP所希望的。