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    <p>I think the completionHandler method is for basic requests. Maybe you could consider using <a href="https://github.com/gowalla/AFNetworking" rel="nofollow noreferrer">AFNetworking</a> as I use this with block methods and authentication.</p> <p>EDIT.... Have you tried adding the authentication header to the NSURLRequest? Create an NSMutableURLRequest:</p> <pre><code>NSMutableURLRequest *urlRequest = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:@"http://www.example.com/"]]; </code></pre> <p>And add the authentication header like this:</p> <pre><code>NSString *basicAuthCredentials = [NSString stringWithFormat:@"%@:%@", userName, password]; NSString *authValue = [NSString stringWithFormat:@"Basic %@", AFBase64EncodedStringFromString(basicAuthCredentials)]; [urlRequest setValue:authValue forHTTPHeaderField:@"Authorization"]; </code></pre> <p>The AFBase64EncodedStringFromString function is this:</p> <pre><code>static NSString * AFBase64EncodedStringFromString(NSString *string) { NSData *data = [NSData dataWithBytes:[string UTF8String] length:[string lengthOfBytesUsingEncoding:NSUTF8StringEncoding]]; NSUInteger length = [data length]; NSMutableData *mutableData = [NSMutableData dataWithLength:((length + 2) / 3) * 4]; uint8_t *input = (uint8_t *)[data bytes]; uint8_t *output = (uint8_t *)[mutableData mutableBytes]; for (NSUInteger i = 0; i &lt; length; i += 3) { NSUInteger value = 0; for (NSUInteger j = i; j &lt; (i + 3); j++) { value &lt;&lt;= 8; if (j &lt; length) { value |= (0xFF &amp; input[j]); } } static uint8_t const kAFBase64EncodingTable[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; NSUInteger idx = (i / 3) * 4; output[idx + 0] = kAFBase64EncodingTable[(value &gt;&gt; 18) &amp; 0x3F]; output[idx + 1] = kAFBase64EncodingTable[(value &gt;&gt; 12) &amp; 0x3F]; output[idx + 2] = (i + 1) &lt; length ? kAFBase64EncodingTable[(value &gt;&gt; 6) &amp; 0x3F] : '='; output[idx + 3] = (i + 2) &lt; length ? kAFBase64EncodingTable[(value &gt;&gt; 0) &amp; 0x3F] : '='; } return [[NSString alloc] initWithData:mutableData encoding:NSASCIIStringEncoding]; } </code></pre> <p>Then call the function you called before, but using your new NSURLRequest:</p> <pre><code>[NSURLConnection sendAsynchronousRequest:urlRequest queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) { }]; </code></pre>
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    1. CO`AFBase64EncodedStringFromString` is a private function, and is not intended to be used by itself. Instead, you can do `AFHTTPClient setAuthorizationHeaderWithUsername:password:` and create an `NSURLRequest` with `-requestWithMethod:path:parameters:` (or simply copy the authorization header from the generated request.
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    2. COThere must be a way to achieve this without 3rd party libraries...
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