AFHTTPSessionManager to use SOAP based service

I checked few posts (this and this) in Stackoverflow but none of them answered "How to use AFHTTPSessionManager to use SOAP based web service".

Is it not possible or we need to do some tweaking like subclassing etc?

I can call the SOAP based using AFHTTPRequestOperation but this is what I don't want to use since I have XML & JSON web services there I am using AFHTTPSessionManager. I want to have similar approach throughout my application.

My codes using RequestOperation is :

NSString *soapMessage = @"<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"
"<soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">n"
"<soap:Body>\n"
"<CelsiusToFahrenheit xmlns=\"http://tempuri.org/\">\n"
"<Celsius>50</Celsius>\n"
"</CelsiusToFahrenheit>\n"
"</soap:Body>\n"
"</soap:Envelope>n";

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://tempuri.org/"]];
[request setValue:@"text/xml" forHTTPHeaderField:@"Content-type"];
[request setHTTPMethod:@"POST"];
[request setHTTPBody:[soapMessage dataUsingEncoding:NSUTF8StringEncoding]];

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

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

[operation start];

I tried using SessionManager but this doesn't work: (the request is same as in above code snippet), I get data as nil and response has some values, also the error has some values in it.

AFHTTPSessionManager *sManager = [[AFHTTPSessionManager alloc] init];

[sManager dataTaskWithRequest:(NSURLRequest *)request
            completionHandler:^( NSURLResponse *response, NSData *data, NSError *error){

                NSLog(@"Data: %@", data);
                NSLog(@"Resp: %@", response);
                NSLog(@"Err: %@", error);
}];

I tried for multiple hours and finally was able to get some response and no-error. Here is the updated code:

NSString *soapMessage = @"<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"
"<soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">n"
"<soap:Body>\n"
"<CelsiusToFahrenheit xmlns=\"http://tempuri.org/\">\n"
"<Celsius>50</Celsius>\n"
"</CelsiusToFahrenheit>\n"
"</soap:Body>\n"
"</soap:Envelope>n";

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://tempuri.org/"]];
[request setValue:@"text/xml" forHTTPHeaderField:@"Content-type"];
[request setHTTPMethod:@"POST"];

[request setHTTPBody:[soapMessage dataUsingEncoding:NSUTF8StringEncoding]];


AFHTTPSessionManager *sManager = [[AFHTTPSessionManager alloc] init];
sManager.responseSerializer = [AFHTTPResponseSerializer serializer];

NSURLSessionDataTask *dataTask = [sManager dataTaskWithRequest:(NSURLRequest *)request
            completionHandler:^( NSURLResponse *response, id responseObject, NSError *error){
                NSString *resString = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];
                NSLog(@"Data: %@", resString);
                //NSLog(@"Resp: %@", [response ]);
                NSLog(@"Err: %@", error);
            }];
[dataTask resume];