NSURLConnection + Basic Auth

gistfile1.m

@implementation WhateverClass

+ (NSString *)getBasicAuth
{
    NSData *encodeData = [[NSString stringWithFormat:@"%@:%@", username, password]
                                   dataUsingEncoding:NSUTF8StringEncoding];

    // from NSData+Base64.m by Matt Gallagher
    NSString *credentials = [encodeData base64EncodedString];

    NSString *header = [NSString stringWithFormat:@"Basic %@", credentials];
    return header;
}

- (void)someConnectionMethod
{
    NSRunLoop *defaultRunLoop = [NSRunLoop currentRunLoop];
    NSString *defaultMode = NSDefaultRunLoopMode;

    URLConnection = [[NSURLConnection alloc] initWithRequest:request
                                                    delegate:self
                                            startImmediately:NO];
    [URLConnection scheduleInRunLoop:defaultRunLoop
                             forMode:defaultMode];
    [URLConnection start];
}

@end

@implementation WhateverClass (NSURLConnectionDelegate)

#pragma mark - NSURLConnectionDelegate
- (NSURLRequest *)connection:(NSURLConnection *)connection
             willSendRequest:(NSURLRequest *)request
            redirectResponse:(NSURLResponse *)response
{
    NSMutableURLRequest *updatedRequest = [[request mutableCopy] autorelease];
    
    [updatedRequest setValue:[self getBasicAuth] forHTTPHeaderField:@"Authorization"];
    
    BOOL isRedirect = !!response;
    if (isRedirect) {
        // reset the responseData to clear it between redirect requests
    }
    return updatedRequest;
}

@end