Set UIWebView's user agent into NSMutableURLRequest

gistfile1.m

    NSString *urlString = [NSString stringWithFormat:@"http://example.com/foo"];
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:urlString]];
    // get User Agent in UIWebView
    UIWebView *webView = [[UIWebView alloc] initWithFrame:CGRectZero];
    NSString *userAgent = [webView stringByEvaluatingJavaScriptFromString:@"navigator.userAgent"];
    NSLog(@"UserAgent: %@", userAgent);
    [webView release];    

    [request setValue:userAgent forHTTPHeaderField:@"User-Agent"];
    NSURLResponse *response;
    NSError *error = nil;
    NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];

    NSHTTPURLResponse *res = (NSHTTPURLResponse *)response;
    if (error || [res statusCode] != 200) {
        return  nil;
    } else {
        return data;
    }