c# - iOS http POST 请求

Question

我在服务器上有一个 API，我试图从中获取 JSON 响应。我用过几个请求工具模拟一次调用，每次都能得到正确的数据。这是我的请求设置:

NSString *post = [NSString stringWithFormat:@"user_id=%@&last_sync=%@",user_id, last_sync];
NSURL *directoryURL = [NSURL URLWithString:directoryURI];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:directoryURL];

[request setHTTPMethod:@"POST"];
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
[request setHTTPBody:[NSData dataWithBytes:[post UTF8String] length:[post length]]];

内容类型在我的模拟请求中也是相同的。没有返回错误，只是没有内容。

Answer 1

我使用 AFNetworking 库，它减轻了 HTTP 通信的很多痛苦。

我的 POST 调用如下:

NSURL *nsURL = [NSURL URLWithString:@"http://someurl.com"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:nsURL];

[request setHTTPMethod:@"POST"];
[request addValue:@"xxxx" forHTTPHeaderField:@"yyy"]; // for any header params you want to pass in
[request addValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
[request addValue:@"application/json" forHTTPHeaderField:@"Accept"];

// If you need to pass any JSOn data to your WS
if (json != nil) [request setHTTPBody:json];

AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request
success:^(NSURLRequest *returnedRequest, NSHTTPURLResponse *response, id JSON)
{
    ...
}
failure:^(NSURLRequest *returnedRequest, NSHTTPURLResponse *response, NSError *error, id JSON)
{
       ...
}];