AFNetworking POST到REST webservice

Question

简介背景故事，我们以前的开发人员使用ASIHTTPRequest来发出POST请求并从我们的web服务中检索数据。原因未知我们的应用程序的这部分停止工作。似乎有足够的时间来证明未来，并与AFNetworking合作。 REST webservice在CakePHP框架上运行。

总之，我没有收到使用AFNetworking的请求响应字符串。

我知道web服务工作，因为我能够成功发布的数据，并使用得到适当的响应卷曲： 卷曲-d“数据[产品型号] [field0] = field0value &数据[产品型号] [字段1] = field1value” https://example.com/api/class/function.plist

根据以前的开发人员的指示，我想出了以下内容。

#import "AFHTTPRequestOperation.h"  

… 

- (IBAction)loginButtonPressed { 

    NSURL *url = [NSURL URLWithString:@"https://example.com/api/class/function.plist"]; 

    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url]; 

    [request setHTTPMethod:@"POST"]; 

    [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"]; 

    [request setValue:[usernameTextField text] forHTTPHeaderField:@"data[User][email]"]; 

    [request setValue:[passwordTextField text] forHTTPHeaderField:@"data[User][password]"]; 

    AFHTTPRequestOperation *operation = [[[AFHTTPRequestOperation alloc] initWithRequest:request] autorelease]; 

    [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) { 

     NSLog(@"operation hasAcceptableStatusCode: %d", [operation.response statusCode]); 

     NSLog(@"response string: %@ ", operation.responseString); 

    } failure:^(AFHTTPRequestOperation *operation, NSError *error) { 

     NSLog(@"error: %@", operation.responseString); 

    }]; 

    [operation start]; 

} 

输出： 操作hasAcceptableStatusCode：200 响应字符串：空白plist文件

尝试的解决方案1： AFNetworking Post Request 所提出的解决方案使用AFHTTPRequestOperation的函数调用operationWithRequest。但是，当我尝试使用所述解决方案时，我收到警告“类方法”+ operationWithRequest：完成：'未找到（返回类型默认为'id'“

尝试解决方案2：NSURLConnection。output：打印传递消息的成功日志，但不响应字符串 *更新 - 。返回空白的plist

NSMutableURLRequest *req = [NSMutableURLRequest requestWithURL:url]; 
NSString *httpBodyData = @"data[User][email][email protected]&data[User][password]=awesomepassword"; 
[httpBodyData dataUsingEncoding:NSUTF8StringEncoding]; 
[req setHTTPMethod:@"POST"]; 
[req setHTTPBody:[NSData dataWithContentsOfFile:httpBodyData]]; 
NSHTTPURLResponse __autoreleasing *response; 
NSError __autoreleasing *error; 
[NSURLConnection sendSynchronousRequest:req returningResponse:&response error:&error]; 

// *update - returns blank plist 
NSData *responseData = [NSURLConnection sendSynchronousRequest:req returningResponse:nil error:nil]; 
NSString *str = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding]; 
NSLog(@"responseData %@",str); 

if (error == nil && response.statusCode == 200) { 
    // Process response 
    NSLog(@"success");//returns success code of 200 but blank 
    NSLog(@"resp %@", response); 
} else { 
    // Process error 
    NSLog(@"error"); 
} 

Answer 1

这些是最终满足我对Web服务请求的基本要求（剥离条件是我为自己使用的）。感谢@ 8vius和@mattt的建议！

- (IBAction)loginButtonPressed {   
    NSURL *baseURL = [NSURL URLWithString:@"https://www.example.com/api/class"]; 

    //build normal NSMutableURLRequest objects 
    //make sure to setHTTPMethod to "POST". 
    //from https://github.com/AFNetworking/AFNetworking 
    AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL:baseURL]; 
    [httpClient defaultValueForHeader:@"Accept"]; 

    NSDictionary *params = [NSDictionary dictionaryWithObjectsAndKeys: 
          [usernameTextField text], kUsernameField, 
          [passwordTextField text], kPasswordField, 
          nil]; 

    NSMutableURLRequest *request = [httpClient requestWithMethod:@"POST" 
      path:@"https://www.example.com/api/class/function" parameters:params]; 

    //Add your request object to an AFHTTPRequestOperation 
    AFHTTPRequestOperation *operation = [[[AFHTTPRequestOperation alloc] 
             initWithRequest:request] autorelease]; 

    //"Why don't I get JSON/XML/Property List in my HTTP client callbacks?" 
    //see: https://github.com/AFNetworking/AFNetworking/wiki/AFNetworking-FAQ 
    //mattt's suggestion http://stackoverflow.com/a/9931815/1004227 - 
    //-still didn't prevent me from receiving plist data 
    //[httpClient registerHTTPOperationClass: 
    //   [AFPropertyListParameterEncoding class]]; 

    [httpClient registerHTTPOperationClass:[AFHTTPRequestOperation class]]; 

    [operation setCompletionBlockWithSuccess: 
     ^(AFHTTPRequestOperation *operation, 
     id responseObject) { 
     NSString *response = [operation responseString]; 
     NSLog(@"response: [%@]",response); 
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) { 
     NSLog(@"error: %@", [operation error]); 
    }]; 

    //call start on your request operation 
    [operation start]; 
    [httpClient release]; 
} 

Answer 2

使用AFHTTPClient -postPath:parameters:success:failure:，通过你的参数（嵌套词典/阵列罚款）如果你希望一个plist中回来。 ，一定要有客户端注册AFPropertyListRequestOperation

在任何情况下，setValue:forHTTPHeaderField:不是你想要的。 HTTP headers用于指定关于请求本身的信息;数据是请求主体的一部分。 AFHTTPClient自动将参数转换为GET请求的查询字符串或POST等的HTTP主体。