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PONSURLConnection Data broken in asynchronous connection
 

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  1. PONSURLConnection Data broken in asynchronous connection
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    <p>I have a NSURLConnection that receives data output from a url pointing to a php script on my server.</p> <p>Most of the time everything works fine and the data is retrieved in its complete form.</p> <p>However, sometimes I receive NULL or broken (i.e. the bottom half) of data at:</p> <pre><code>- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data </code></pre> <p>When this happens, if I reload the connection it will always return the same null or broken block of data for the request.</p> <p>EDIT*: I've realized that when I receive what I thought was nil data, I actually received data but the NSString created from this data is nil. I still don't understand why though. My php encoding output is always UTF-8 so I don't think it is an issue of encoding and besides it works most of the time with this.</p> <p>I have checked the php script with that same request to verify that it is not a problem on the server side or with the php script and confirmed that it is NOT.</p> <p>My code is Below:</p> <pre><code>-(void)setUpConnectionAndMakeRequest { NSString *URLpath = @"http://www.example.com/myphp.php"; NSURL *myURL = [[NSURL alloc] initWithString:URLpath]; NSMutableURLRequest *myURLRequest = [NSMutableURLRequest requestWithURL:myURL cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:60]; [myURL release]; [myURLRequest setHTTPMethod:@"POST"]; //I added this because I thought it may be a problem relating to cache but it isn't NSURLCache *cache = [NSURLCache sharedURLCache]; [cache removeAllCachedResponses]; NSString *httpBodystr = [NSString stringWithString:@"command=runscript"]; [myURLRequest setHTTPBody:[httpBodystr dataUsingEncoding:NSUTF8StringEncoding]]; [mailData setData:nil]; //mailData is a NSMutableData object which accumulates the data retrieved by the request [NSURLConnection connectionWithRequest:myURLRequest delegate:self]; } - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { NSString *untrimmedDataSTR = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]; //Created so I can see the data (always text) in NSLog NSLog(@"Live Data: %@", untrimmedDataSTR); //This is where I see that the data is broken or null when it shouldn't be [mailData appendData:data]; //Append accumulated data to NSMutableData object used later in my app. [untrimmedDataSTR release]; } </code></pre> <p>Any help would be much appreciated. </p>
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    1. USZigglzworth
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      1. VTUpMod
    1. COAre you sure if your setUpConnectionAndMakeRequest is not loaded twice before the earlier connection is finished?
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      1. PONSURLConnection Data broken in asynchronous connection
      1. USAkash Kava
    2. COI had exactly this problem and changing the encoding to ASCII solved it. Are you sure your input is UTF-8?
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      1. PONSURLConnection Data broken in asynchronous connection
      1. USGreg Sexton
    3. COYes, changing the encoding to NSASCIIStringEncoding solved this issue. Thanks.
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      1. USZigglzworth
 

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