AFNetworking 2.0在故障块中从代码400获取JSON [英] AFNetworking 2.0 Get JSON from code 400 in failure block

问题描述

我正在使用 AFHTTPRequestOperationManager 获取 POST 请求。现在我故意输入不正确的信息来处理 400 错误代码。现在，Web服务实际上返回一个 JSON ，其中包含一条消息，向用户解释他们做错了什么。我非常希望得到这个 JSON 来在 UIAlertView 中显示消息。但是，失败块：

I'm using AFHTTPRequestOperationManager for a POST request. Now I'm deliberately entering incorrect information to handle a 400 error code. Now, the web service actually returns a JSON with a message explaining to the user what they've done wrong. I would very much like to get this JSON to display the message in a UIAlertView. However, the failure block of:

[operationManager POST:ServerURL parameters:parameters success:^(AFHTTPRequestOperation *operation, id responseObject) {
    NSLog(@"Success: Status Code: %d", operation.response.statusCode);
}
 failure:^(AFHTTPRequestOperation *operation, NSError *error) {
     NSLog(@"Failed: Status Code: %d", operation.response.statusCode);
 }];

不传递响应对象，如成功块中的那个。那么有谁知道如何访问由Web服务返回的400错误的JSON？ NSError *错误只是给我请求失败：错误请求（400）而不是返回JSON。

doesn't pass down a responseObject like the one in the success block. So does anyone know how I can access the JSON returned by the Web Service with the 400 error? The NSError *error simply gives me Request failed: bad request (400) and not the JSON returned.

任何帮助将不胜感激，迈克

Any help would be appreciated,
Mike

推荐答案

看着代码为 - responseObject ，似乎HTTP错误阻止了它的填充。您可以直接获取 responseData 并自行解析，但我会说这是一个错误或一个好的增强请求。 （看起来像 - responseObject 可能应该检查 self.responseSerializationError ，而不是 self.error ，在决定是否应该尝试构建响应对象时。）

Looking at the code for - responseObject, it appears that an HTTP error prevents it from being populated. You can grab the responseData directly and parse it yourself, but I would say this is either a bug or a good enhancement request. (It looks like - responseObject probably should be checking self.responseSerializationError, not self.error, when deciding if it should try to build a response object.)

这篇关于AFNetworking 2.0在故障块中从代码400获取JSON的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！