IOS 7 how to print the url response data

Question

I am trying to call a web service. I tried this

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://192.168.75.1:8082/projectname/public/tests"]];
    NSURLSessionConfiguration *configuration = [ NSURLSessionConfiguration ephemeralSessionConfiguration];
    NSURLSession *session = [NSURLSession sessionWithConfiguration:configuration];
    NSURLSessionDownloadTask *task = [session downloadTaskWithRequest:request completionHandler:^(NSURL *localFile, NSURLResponse *response, NSError *error) {
        if(!error){
            NSLog(@"no error");

        }else{
            NSLog(@"error");
        }
    }];
    [task resume];
}

as you see there are two nslog statements. I got the no error one.

when I call that web service from my safari, I got a simple string which is index printed in the browser, how can I see that string in my xcode please?

Thanks

Are you sure, you need NSURLSession? its for downloading the data. Or you just need the response? — Anil Varghese, Jul 18 '14 at 12:19
you can implement the delegate method - (void)URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask didFinishDownloadingToURL:(NSURL *)location; — Dheeraj Kumar, Jul 18 '14 at 12:22
OP has used Completion handler. Then there is no need of delegate i guess — Anil Varghese, Jul 18 '14 at 12:26
@Anil yes exactly that is what I learned in a tutorial. I am confused about these answers, I thought my way is wrong — Carol Smith, Jul 18 '14 at 12:30
Check **http://code.tutsplus.com/tutorials/networking-with-nsurlsession-part-2--mobile-21581** — Kumar KL, Jul 18 '14 at 12:30
http://stackoverflow.com/questions/19145093/how-to-get-download-progress-in-afnetworking-2-0 — Kumar KL, Jul 18 '14 at 12:37
@KumarKL in this case, which is the response is json or string, should I use download or data task please? — Carol Smith, Jul 18 '14 at 12:48

Dheeraj Kumar · Answer 1 · 2014-07-18T12:41:09.337

2

you can implement the delegate method

- (void)URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask didFinishDownloadingToURL:(NSURL *)location;

EDIT

Try This

NSHTTPURLResponse *response = nil;
NSError *error = nil;

NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:[NSURL      URLWithString:YOUR URL]];
NSData *respData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
NSLog(@"~~~~~ Status code: %d", [response statusCode]);
//Print your recived data here..
NSString *str = [[NSString alloc] initWithData:respData encoding:NSUTF8StringEncoding];
NSLog(@"str: %@", str);

edited Jul 18 '14 at 12:41

answered Jul 18 '14 at 12:24

Dheeraj Kumar

441
3
16

you can refer this link for detail:- *http://hayageek.com/ios-nsurlsession-example/* – Dheeraj Kumar Jul 18 '14 at 12:24
I am now to IOS, could you please change my code and tell me what to delete from it ? or I have to keep it as it is and just add your function? also how to print the message inside ur code please? – Carol Smith Jul 18 '14 at 12:28
thanks. However, you didn't use nsurlsession, which as I read is very recommended. is that correct plz? – Carol Smith Jul 18 '14 at 12:48
NSUrlsession is for downloading file, and here you are not downloading any file just response or string, so it is not nessecery to use NSURlsession.. – Dheeraj Kumar Jul 18 '14 at 13:10
+1 for the efforts. However, I found that using `NSSession` is better. – Carol Smith Jul 20 '14 at 20:52

score 1 · Accepted Answer · answered Jul 18 '14 at 12:23

1

You can use the delegate methods. When a NSURLSessionDownlaodTask is completed, it's delegates will be called if your class confirmed to it.

-(void)URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask didFinishDownloadingToURL:(NSURL *)location

you can get your response by parsing the data in that delegate method. It will tell you the location that the URLSession stores the downloaded result.

answered Jul 18 '14 at 12:23

BalaChandra

632
9
33

I am now to IOS, could you please change my code and tell me what to delete from it ? or I have to keep it as it is and just add your function? also how to print the message inside ur code please? lastly, I am using the correct way to call the web service? – Carol Smith Jul 18 '14 at 12:29

score 1 · Answer 3 · answered Jul 18 '14 at 13:38

what I would do If I were you is:

NOTE: it is based on you said you receive a simple string only from your back-end. if that is not a simple string, you may need to revise the –connectionDidFinishLoading: method's body.

.h

@interface UIRandomViewController : UIViewController {

    NSURLConnection *_urlConnection;
    NSMutableData *_receivedData;

    // ...

}

// ...

@end

.m

@implementation UIRandomViewController {

    // ...

    - (void)viewDidAppear:(BOOL)animated {
        [super viewDidAppear:animated];

        NSURLRequest *_request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://192.168.75.1:8082/projectname/public/tests"]];
        _urlConnection = [[NSURLConnection alloc] initWithRequest:_request delegate:self startImmediately:TRUE];

        // ...

    }

    // ...

    #pragma mark - <NSURLConnectionDelegate>

    - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
        _receivedData = nil;
    }

    - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
        if (_receivedData == nil) _receivedData = [NSMutableData dataWithData:data];
        else [_receivedData appendData:data];
    }

    - (void)connectionDidFinishLoading:(NSURLConnection *)connection {
        NSString *_receivedString = [[NSString alloc] initWithData:_receivedData encoding:NSUTF8StringEncoding];
        // hello beautiful...
        NSLog(@"received data : %@", _receivedString);
    }
}

@end

IOS 7 how to print the url response data

3 Answers3

.h

.m