How to cancel web service call - IOS

Question

I have user authentication in my iPhone application. User login works in a way that application send username/password to web service for user check. The problem I have now is I don't know how to setup 'timeout' (30 seconds) and stop requesting data from web service?

NSString *soapMsg = 
    [NSString stringWithFormat:
     @"<?xml version=\"1.0\" encoding=\"utf-8\"?>...", username, password
     ];

    NSURL *url = [NSURL URLWithString: @"http://...Service.asmx"];      

    NSMutableURLRequest *req = [NSMutableURLRequest requestWithURL:url];    
    NSString *msgLength = [NSString stringWithFormat:@"%d", [soapMsg length]];

    [req addValue:@"text/xml; charset=utf-8" forHTTPHeaderField:@"Content-Type"];   
    [req addValue:@"http://.../LoginUser" forHTTPHeaderField:@"SOAPAction"];    
    [req addValue:msgLength forHTTPHeaderField:@"Content-Length"];   
    [req setHTTPMethod:@"POST"];
    [req setHTTPBody: [soapMsg dataUsingEncoding:NSUTF8StringEncoding]];

    conn = [[NSURLConnection alloc] initWithRequest:req delegate:self];

    if (conn) 
    {
        webData = [[NSMutableData data] retain];
    }

score 4 · Accepted Answer · answered Jul 22 '11 at 07:14

4

[req setTimeoutInterval:urInterval];

setTimeoutInterval:
Sets the receiver’s timeout interval, in seconds.

- (void)setTimeoutInterval:(NSTimeInterval)timeoutInterval

Parameters

timeoutInterval
The timeout interval, in seconds. If during a connection attempt
the request remains idle for longer than the timeout interval, the request is considered to have timed out. The default timeout interval is 60 seconds.

answered Jul 22 '11 at 07:14

visakh7

26,380
8
55
69

I added '[req setTimeoutInterval:30];'. And now if request is time out where is the handler for this? Is it '-(void) connection:(NSURLConnection *) connection didFailWithError:(NSError *) error '? – 1110 Jul 22 '11 at 07:26

score 0 · Answer 2 · answered Jul 22 '11 at 07:13

You can use the cancel method of the NSURLConnection

/*! 
    @method cancel
    @abstract Cancels an asynchronous load of a URL.
    @discussion Once this method is called, the asynchronous load is
    stopped, and the NSURLConnectionDelegate associated with the
    receiver will no longer receive any asynchronous callbacks for
    this NSURLConnection.
*/
- (void)cancel;

score 0 · Answer 3 · edited May 23 '17 at 12:23

0

Maybe ASIHTTP might help you?

Also, if I understood you correctly, a mostly similar issue on stackoverflow.

edited May 23 '17 at 12:23

Community

1
1

answered Jul 22 '11 at 07:14

Christopher Will

2,991
3
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How to cancel web service call - IOS

3 Answers3