objective-c - 对 WCF REST 服务的 AFNetworking JSON 请求

Question

我正在为我的 REST 服务 (WCF) 使用 AFNetworking。这是代码:

  NSDictionary *userName = [NSDictionary dictionaryWithObject:@"user" forKey:@"UserNameOrEmail"];
  NSDictionary *pass = [NSDictionary dictionaryWithObject:@"123" forKey:@"Password"];
  NSArray *credentials = [NSArray arrayWithObjects:userName,pass,nil];
  NSDictionary *params = [NSDictionary dictionaryWithObject:credentials forKey:@"request"];


  AFHTTPClient *client = [[AFHTTPClient alloc] initWithBaseURL:
  [NSURL URLWithString:@"http://server"]];

  [client postPath:@"/ProfileWebService.svc/login" parameters:params success:^(AFHTTPRequestOperation *operation, id responseObject) {
    NSString *text = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];
    NSLog(@"Response: %@", text);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    NSLog(@"%@", [error localizedDescription]);
}];

但我收到 400 HTTP 错误。

使用 HTML 和 AJAX 看起来像:

        $(document).ready(function () {

            $("#login_call").click(function () {
                $.ajax({
                    type: 'POST',
                    url: 'http://server/ProfileWebService.svc/login',
                    contentType : 'application/json',
                    dataType: 'json',
                    data: JSON.stringify({request: {UserNameOrEmail: $('#login_username').val(), Password: $('#login_password').val()}}),
                    success: function (data) {
                        $('#login_result').val('Code: ' + data.LoginResult.Code + '\nFault String: ' + data.LoginResult.FaultString);
                    }
                });
            });

        });

并且工作正常。

参数有什么问题。

Answer 1

在 Stackoverflow 上学习和搜索更详细的 AFNetworking 文档给了我一个解决方案:

1.请求的参数应该是这样的:

  NSDictionary *params =
        [NSDictionary dictionaryWithObjectsAndKeys:
           [NSDictionary dictionaryWithObjectsAndKeys:
                           username.text, @"UserNameOrEmail",
                           password.text, @"Password",
                           nil],
        @"request",
        nil];

2.创建AFHTTPClient

  AFHTTPClient *client = [[AFHTTPClient alloc] initWithBaseURL:
        [NSURL URLWithString:@"http://server"]];

3.当我发送 JSON 作为参数时，我必须添加:

  client.parameterEncoding = AFJSONParameterEncoding;

在我这样做之后，我摆脱了 404 错误，但我无法用 JSON 响应做任何事情，我不知道为什么。但解决方案是:

4.创建请求:

  NSMutableURLRequest *request = 
  [client requestWithMethod:@"POST" path:@"/ProfileWebService.svc/login" parameters:params];

5.创建一个操作:

  AFJSONRequestOperation *operation =
  [AFJSONRequestOperation JSONRequestOperationWithRequest:request
  success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON)
  {
     NSLog(@"JSON: %@", [JSON valueForKeyPath:@"LoginResult"]);
     NSLog(@"Code: %@", [[[JSON valueForKeyPath:@"LoginResult"] valueForKeyPath:@"Code"] stringValue]);
     NSLog(@"FaultString: %@", [[JSON valueForKeyPath:@"LoginResult"] valueForKeyPath:@"FaultString"]);
  }
  failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, id JSON)
  {
     NSLog(@"error opening connection");
  }];

6.开始操作:

  [operation start];

希望这篇文章对一些 AFNetworking 初学者有所帮助。