NSDictionary category which sends a HEAD request and returns the header fields as dictionary

MBDictionary

@interface NSDictionary (MBDictionary)

+ (id)dictionaryWithHeadOfURL:(NSURL *)inURL;

@end

@implementation NSDictionary (MBDictionary)

+ (id)dictionaryWithHeadOfURL:(NSURL *)inURL {
	NSDictionary *theResult = nil;
	
	if ([@"http" isEqualToString:[inURL scheme]] || [@"https" isEqualToString:[inURL scheme]]) {
		NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:inURL];
		
		NSURLResponse *theResponse = nil;
		
		NSError *theError = nil;
		
		[theRequest setHTTPMethod:@"HEAD"];
		
		[NSURLConnection sendSynchronousRequest:theRequest returningResponse:&theResponse error:&theError];
		
		if (theError == nil && [theResponse respondsToSelector:@selector(allHeaderFields)]) {            
			theResult = [(id)theResponse allHeaderFields];
		}
	}
	
	return theResult;
}

@end

Usage:

	NSDictionary *theHeader = [NSDictionary dictionaryWithHeadOfURL:[NSURL URLWithString:(NSString *)URLString]];
	
	NSLog(@"%@", theHeader);

Result (example):

{
    "Accept-Ranges" = bytes;
    Connection = "Keep-Alive";
    "Content-Length" = 5342;
    "Content-Type" = "text/plain";
    Date = "Fri, 05 Aug 2011 12:59:00 GMT";
    Etag = "\"9aaac21-14de-4a98c147854d7\"";
    "Keep-Alive" = "timeout=3, max=100";
    "Last-Modified" = "Tue, 02 Aug 2011 21:03:30 GMT";
    Server = "Apache/2.2.19 (Unix) mod_ssl/2.2.19 OpenSSL/0.9.8r";
}