Setting authorization header in AFNetworking with special characters

authHeader AFNetworking

// Override the following method in AFHTTPClient.m

- (void)setAuthorizationHeaderWithUsername:(NSString *)username password:(NSString *)password {   
    CFHTTPMessageRef dummyRequest = CFHTTPMessageCreateRequest(kCFAllocatorDefault, (CFStringRef)@"GET", (__bridge CFURLRef)[NSURL URLWithString:@"http://yourdummyurl.com"], kCFHTTPVersion1_1);
    if (dummyRequest) {
        CFHTTPMessageAddAuthentication(dummyRequest, nil, (__bridge CFStringRef)username, (__bridge CFStringRef)password,kCFHTTPAuthenticationSchemeBasic, FALSE);
        CFStringRef authorizationString = CFHTTPMessageCopyHeaderFieldValue(dummyRequest, CFSTR("Authorization"));
        if (authorizationString) {
            NSLog(@"Authorization: %@", authorizationString);
            [self setDefaultHeader:@"Authorization" value:[NSString stringWithFormat:@"%@", authorizationString]];
            CFRelease(authorizationString);
        }
        CFRelease(dummyRequest);
    }
}