Sending an HTTP POST request and Receive a responce from server on iOS

Question

I am trying to get connection from server and receive response from server but I can't understand for the response code.

NSString *post = [NSString stringWithFormat:@"Username=%@&Password=%@",@"_username",@"_password"];
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:@"%lu",(unsigned long)[postData length]];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:@"https://<MY_URL>"]];
[request setHTTPMethod:@"POST"];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
[request setHTTPBody:postData];
if(conn) {
    NSLog(@"Connection Successful");
} else {
    NSLog(@"Connection could not be made");
}

this is correct or not because I am not getting a response .??

now what is code for response?????

NSURLResponse *response=nil;
[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:nil];
NSLog(@"%@",response);
if (response) {
  //UIStoryboard *story=[UIStoryboard storyboardWithName:@"Main" bundle:nil];
  //TableViewController *obj=[story instantiateViewControllerWithIdentifier:@"table1"];
  UIAlertView *alert=[[UIAlertView alloc]initWithTitle:@"Login success" message:@"correct Username or Password" delegate:self cancelButtonTitle:@"Done" otherButtonTitles: nil];
  [alert show];
  //[self.navigationController pushViewController:obj animated:YES];
}
else
{
  UIAlertView *alert=[[UIAlertView alloc]initWithTitle:@"Login Failure" message:@"Incorrect Username or Password" delegate:self cancelButtonTitle:@"Done" otherButtonTitles: nil];
  [alert show];
}

Could you use an NSError when you send the request ? Declare `NSError * requestError = nil` before the request, pass it as error parameter `[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&requestError ];` and finally use `NSLog` it inside the last `else` statement. What is the result of this log? — yageek, Feb 03 '16 at 11:25
Possible duplicate of [Sending an HTTP POST request on iOS](http://stackoverflow.com/questions/15749486/sending-an-http-post-request-on-ios) — dan14941, Feb 03 '16 at 12:14

score 1 · Answer 1 · edited Feb 03 '16 at 12:38

1

You need to fetch that data:

NSError *error = nil;
NSURLResponse *response = nil;
NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];

if(responseData)  { 
    NSDictionary *results = [NSJSONSerialization JSONObjectWithData:responseData options:NSJSONReadingAllowFragments  error:&error];
    NSLog(@"res---%@", results);
}

and use dictionary for further use.

edited Feb 03 '16 at 12:38

Mihriban Minaz

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answered Feb 03 '16 at 10:59

Vijay Palwe

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**NSlog(@"%@",responseData1);** is null – Anup Gupta Feb 03 '16 at 11:21
any error is there means can u plz check the NSError is nil or what? – Vijay Palwe Feb 03 '16 at 11:23
no error but when i check the responseData1 output that is null – Anup Gupta Feb 03 '16 at 11:28
OK let me do it by myself once – Vijay Palwe Feb 03 '16 at 11:29
1

i am getting error like below Error Domain=NSURLErrorDomain Code=-1202 "The certificate for this server is invalid. You might be connecting to a server that is pretending to be “joomerang.geniusport.com” which could put your confidential information at risk." – Vijay Palwe Feb 03 '16 at 11:39
You are using https, but the website only seems to work on http. So either you need to fix your certificates or use the site via HTTP – Black Magic Feb 03 '16 at 11:51
but i have the user name and password to login this server – Anup Gupta Feb 03 '16 at 11:52
HTTP and HTTPS has nothing to do with passwords and logins. HTTPS just means your communication with that site is encrypted. – Black Magic Feb 03 '16 at 16:38
Please don't recommend sendSynchronousRequest:. It is dangerous to use that method on the main thread, and if you use it on any other thread, it leaks. – dgatwood Feb 09 '16 at 08:23

score 0 · Accepted Answer · edited Jun 20 '20 at 09:12

0

ALL the code is correct only you need to add the this in your info.plist

App Transport Security Setting

Allow arbitrary Loads

edited Jun 20 '20 at 09:12

Community

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answered Feb 04 '16 at 12:22

Anup Gupta

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Sending an HTTP POST request and Receive a responce from server on iOS

2 Answers2