iOS将json数据发布到Web服务并返回结果

Question

I've got WCF web service which takes email address and returns "True" if that entry doesn't exist in the database or "False" if it exists.When i used fiddler and POST data to service it returns result as expected, when i try to send request from my iPad app it just say "Invalid JSON primitive: Email.".

Service link: http://www.unluapps.com/Service1.svc/CheckRejected

JSON for testing:

{"Email":"test@unluco.com"}

Ios Code:

 AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
   NSError *e = nil;
   NSDictionary *parameters = [NSJSONSerialization JSONObjectWithData: [[NSString stringWithFormat:@"{\"Email\":\"%@\"}",_TxtMail.text]  dataUsingEncoding:NSUTF8StringEncoding]
        options: NSJSONReadingMutableContainers
        error: &e
    ];

   [manager POST:@"http://www.unluapps.com/Service1.svc/CheckRejected" parameters:parameters success:^(AFHTTPRequestOperation *operation, id responseObject) {
       // NSLog(@"JSON: %@", responseObject);

        _receivedData=responseObject;
        //NSLog(@"%@",[responseObject objectForKey:@"CheckifExistsResult"]);
        NSLog(@"%@",[responseObject objectForKey:@"CheckRejectedResult"]);
    }
    failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"Error: %@", error);
    }
    ]; 

Answer 1

AFHTTPRequestOperationManager uses AFHTTPRequestSerializer by default. Add

manager.requestSerializer = [AFJSONRequestSerializer new];

After AFHTTPRequestOperationManager's initialisation.

Also you can simplify your code:

   AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
   manager.requestSerializer = [AFJSONRequestSerializer new];
   NSDictionary *parameters = @{@"Email": _TxtMail.text};

   [manager POST:@"http://www.unluapps.com/Service1.svc/CheckRejected" parameters:parameters   success:^(AFHTTPRequestOperation *operation, id responseObject) {
       // NSLog(@"JSON: %@", responseObject);

        _receivedData=responseObject;
        //NSLog(@"%@",[responseObject objectForKey:@"CheckifExistsResult"]);
        NSLog(@"%@",[responseObject objectForKey:@"CheckRejectedResult"]);
    }
    failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"Error: %@", error);
    }
    ]; 

Answer 2

Hope this one helps you

You are using AFHTTPRequestOperation and not AFJSONRequestOperation.

Also you can use the AFHttpClient directly:

NSDictionary *parameter = @{@"Email":self.email.text};
[httpClient setParameterEncoding:AFJSONParameterEncoding];
[httpClient registerHTTPOperationClass:[AFJSONRequestOperation class]];

[httpClient postPath:@"http://www.unluapps.com/Service1.svc/CheckRejected" parameters:parameter success:^(AFHTTPRequestOperation *operation, id responseObject) {
    // Print the response body in text
    BOOL *success = [[responseObject objectForKey:@"success"] boolValue];
    NSLog(@"Response: %@",responseObject);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    [self handleConnectionError:error];
}];

I would also suggest creating a creating only one instance of the AFHTTPClient using clientWithBaseURL: method. Also read the documentation on github.com/AFNetworking/AFNetworking it does explain how to correctly use the AFHTTPClient. Have a look at the AFAppDotNetAPIClient this will give you a good example on how to use the AFHTTPClient.

Answer 3

After i spent hours on the code, i found another method and also that the link of the web service is case sensitive.I've changed the code and now it's working. If you are using microsoft products on the server side please be careful not to do the mistakes i made.

The Code:

 AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    [manager POST:@"http://www.unluapps.com/Service1.svc/checkRejected"
       parameters:@{@"email": _TxtMail.text}
          success:^(AFHTTPRequestOperation *operation, id responseObject) {
           NSLog(@"%@",[responseObject objectForKey:@"CheckRejectedResult"]);

          } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
              NSLog(@"Error: %@", error);
    }];