对于状态codeS承诺解决

问题描述

我要澄清的HTTP状态codeS的承诺是解决并为其拒绝，我该怎么理解它只能解决200的情况下，其余被拒绝

I want to clarify for which http status codes promise is resolving and for which is rejecting, how I understand it resolving only for 200 case and the rest is rejecting

这是什么？或者我们有一些其他情况？

it is ? or we have some other cases ?

推荐答案

您可以决定的话，承诺为例

you can decide of it, exemple of promise

var deferred = $q.defer();
        $http({
            method: 'POST',
            url: url,
            data: data,
            headers: {'Content-Type': 'application/x-www-form-urlencoded'}

        })
                .success(function(data, status, headers, config) {
                    deferred.resolve(data);
                })
                .error(function(data, status, headers, config) {
                    var error = [data, status, headers, config];
                    deferred.reject(error);
                    console.log('Error: ' + error);
                });
         deferred.promise.then(function(result) {

         }, function(reason) {
            alert('Failed: ' + reason);
          });

在此code，首先你实例化的承诺

In this code, first you instantiate the promise

 var deferred = $q.defer();

第二个定义哪里是成功的。

Second you define where is success

deferred.resolve(data);

三的失败

deferred.reject(error);

最后，你写你的，当他们中的一个被称为函数

And finally you write your function for when one of them are called

deferred.promise.then(function(result) {

         }, function(reason) {
            alert('Failed: ' + reason);
          });

因此​​，如果您添加

so if you add

.success(function(data, status, headers, config) {
                 if(status == 200) {
                    deferred.resolve(data);
                 }
                })

将返回你只答应当你有HTTP code 200

it will return you promise only when you have http code 200

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