Angular.js中的$ http帖子

时间:2013-04-09 06:20:45

标签: angularjs angular-http

我刚开始学习Angular.js。如何在Angular.js中重写以下代码?

var postData = "<RequestInfo> "
            + "<Event>GetPersons</Event> "         
        + "</RequestInfo>";

    var req = new XMLHttpRequest();

    req.onreadystatechange = function () {
        if (req.readyState == 4 || req.readyState == "complete") {
            if (req.status == 200) {
                console.log(req.responseText);
            }
        }
    };

    try {
        req.open('POST', 'http://samedomain.com/GetPersons', false);
        req.send(postData);
    }
    catch (e) {
        console.log(e);
    }

这是我到目前为止所拥有的 -

function TestController($scope) {
      $scope.persons = $http({
            url: 'http://samedomain.com/GetPersons',
            method: "POST",
            data: postData,
            headers: {'Content-Type': 'application/x-www-form-urlencoded'}
        }).success(function (data, status, headers, config) {
                $scope.data = data; // how do pass this to $scope.persons?
            }).error(function (data, status, headers, config) {
                $scope.status = status;
            });

}

HTML

<div ng-controller="TestController">    
    <li ng-repeat="person in persons">{{person.name}}</li>
</div>

我是朝着正确的方向吗?

3 个答案:

答案 0 :(得分:41)

在当前函数中,如果要将$scope.persons分配给$http,这是一个承诺对象,$http将返回一个承诺对象。

因此,您应该在scope.persons的成功中分配$scope.persons,而不是将$http分配给$ http:

function TestController($scope, $http) {
      $http({
            url: 'http://samedomain.com/GetPersons',
            method: "POST",
            data: postData,
            headers: {'Content-Type': 'application/x-www-form-urlencoded'}
        }).success(function (data, status, headers, config) {
                $scope.persons = data; // assign  $scope.persons here as promise is resolved here 
            }).error(function (data, status, headers, config) {
                $scope.status = status;
            });

}

答案 1 :(得分:13)

以下是 Ajay beni 给出的解决方案的变体。使用然后方法可以链接多个承诺,因为然后会返回一个新的承诺。

function TestController($scope) {
    $http({
        url: 'http://samedomain.com/GetPersons',
        method: "POST",
        data: postData,
        headers: {'Content-Type': 'application/x-www-form-urlencoded'}
    })
    .then(function(response) {
            // success
        }, 
        function(response) { // optional
            // failed
        }
    );
}

答案 2 :(得分:0)

使用$ http:

AngularJS: API: $http

$http.post(url, data, [config]);

实施例:

$http.post('http://service.provider.com/api/endpoint', {
        Description: 'Test Object',
        TestType: 'PostTest'
    }, {
        headers {
            'Authorization': 'Basic d2VudHdvcnRobWFuOkNoYW5nZV9tZQ==',
            'Accept': 'application/json;odata=verbose'
        }
    }
).then(function (result) {
    console.log('Success');
    console.log(result);
}, function(error) {
    console.log('Error:');
    console.log(error);
});

让我们打破这个:Url有点明显,所以我们跳过它......

  1. 数据:这是邮递员请求的正文内容

    {
        Description: 'Test Object',
        TestType: 'PostTest'
    }
    
  2. config:这是我们可以注入标题,事件处理程序,缓存的地方......请参阅AngularJS: API: $http: scroll down to config标题是人们在angularJS中难以复制的最常见的http邮递变体

    {
        headers {
            'Authorization': 'Basic d2VudHdvcnRobWFuOkNoYW5nZV9tZQ==',
            'Accept': 'application/json;odata=verbose'
        }
    }
    
  3. 响应:$ http操作返回一个有角度的承诺,我建议使用.then(successFunction,errorFunction)来处理该承诺,请参阅AngularJS: The Deferred API (Promises)

    .then(function (result) {
        console.log('Success');
        console.log(result);
    }, function(error) {
        console.log('Error:');
        console.log(error);
    });