Apr 11

For those of you interested in COCOA Objective-C development, here is some code to proper achieve an upload using HTTP POST.
The input data as you can see is provided by some NSTextFields.
The HTTP request is done Synchronously but there is a simple way to do it asynchronously.
So here you go :

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?View Code C_MAC
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- (IBAction)upload:(id)sender
{
 
    //creating the url request:
    NSURL *cgiUrl = [NSURL URLWithString:@"http://www.testsite.com/upload.php"];
    NSMutableURLRequest *postRequest = [NSMutableURLRequest requestWithURL:cgiUrl];
 
    //adding header information:
    [postRequest setHTTPMethod:@"POST"];
 
    NSString *stringBoundary = [NSString stringWithString:@"0xKhTmLbOuNdArY"];
    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",stringBoundary];
    [postRequest addValue:contentType forHTTPHeaderField: @"Content-Type"];
 
 
    //setting up the body:
    NSMutableData *postBody = [NSMutableData data];
    [postBody appendData:[[NSString stringWithFormat:@"\r\n\r\n--%@\r\n",stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [postBody appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"title\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
    [postBody appendData:[[NSString stringWithString:[edTitle stringValue]] dataUsingEncoding:NSUTF8StringEncoding]];
 
 
    [postBody appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [postBody appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"description\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
    [postBody appendData:[[NSString stringWithString:[edDescript stringValue]] dataUsingEncoding:NSUTF8StringEncoding]];
 
 
    [postBody appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [postBody appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"username\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
    [postBody appendData:[[NSString stringWithString:[edUser stringValue]] dataUsingEncoding:NSUTF8StringEncoding]];
 
 
    [postBody appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [postBody appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"password\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
    [postBody appendData:[[NSString stringWithString:[edPasswd stringValue]] dataUsingEncoding:NSUTF8StringEncoding]];
 
 
    [postBody appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [postBody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"videoFile\"; filename=\"@\"\r\n", [[edFileName stringValue] lastPathComponent]] dataUsingEncoding:NSUTF8StringEncoding]];
    [postBody appendData:[[NSString stringWithString:@"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
    [postBody appendData:[[NSString stringWithString:@"Content-Transfer-Encoding: binary/video\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
 
    [postBody appendData:[NSData dataWithContentsOfFile:[edFileName stringValue]]];
 
    [postBody appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [postRequest setHTTPBody:postBody];
 
 
    NSError *error;
    NSData *searchData;
    NSHTTPURLResponse *response;
    int n = 0;
 
    //==== Synchronous call to upload
    searchData = [ NSURLConnection sendSynchronousRequest:postRequest returningResponse:&response error:&error];
 
    while (1)
    {
        if ([ response allHeaderFields])
        {
            NSString *monster = [[ response allHeaderFields] valueForKey:@"Monstermsg"] ;
            NSAlert *alert = [[NSAlert alloc] init];
            [alert addButtonWithTitle:@"OK"];
            [alert setMessageText: monster ];
            [alert setAlertStyle:NSWarningAlertStyle];
            if ([alert runModal] == NSAlertFirstButtonReturn)
            {
                NSLog(@"%@", monster);
            }
            [alert release];
            break;
        }
        NSLog(@"%d", n++);
    }
}
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