Getting the mimetypes of files loaded in a UIWebView

I am trying to get the MIME Types of files loaded in a UIWebView so that I can download them the method i have right now works some of the times, is there anyway I can do it better?

- (BOOL)webView:(UIWebView*)webView shouldStartLoadWithRequest:(NSURLRequest*)request navigationType:(UIWebViewNavigationType)navigationType 
{   
   NSURL *url = request.URL;
   NSString *main = url.absoluteString;
   //enter code here currentURL = main;
   NSURLRequest *req  = [NSURLRequest requestWithURL:url];
   NSURLConnection *conn = [NSURLConnection connectionWithRequest:req delegate:self];
   [conn start];
   return YES;
}

NSString *mime = [response MIMEType];
NSLog(@"%@",mime);
DownloadManagerAppDelegate *delegate = (DownloadManagerAppDelegate *)[[UIApplication sharedApplication] delegate];

DLMan *downloadView = [[DLMan alloc] init];
if ([mime rangeOfString:@"application/x-compressed"].length>0 || [mime rangeOfString:@"application/x-zip-compressed"].length>0  || [mime rangeOfString:@"application/zip"].length>0 || [mime rangeOfString:@"multipart/x-zip"].length>0) 
{
  self.tabBarContr开发者_JAVA技巧oller.selectedIndex = 1;
  [[delegate myDownloadManager]addDownload:currentURL];
  NSLog(currentURL);
  NSLog(@"download");
}

In the NSURLConnectiondelegate didReceiveResponse use something like this:

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response 
{
   NSString *mime = [response MIMEType];
}

As I have read that you're not getting The MIME correctly you might be interested in another approach, create a plist of the MIME Types for example mimeTypes.plist

(Not necessarily all the types at least the types you are going to work with or handle)

Load them into a NSDicionary using:

NSString *mainBundlePath = [[NSBundle mainBundle] bundlePath];
NSString *plistPath = [mainBundlePath stringByAppendingPathComponent:@"mimeTypes.plist"];

NSDictionary *dict = [[NSDictionary alloc] initWithContentsOfFile:plistPath]

Check the MIME by searching the Target's Extension:

[dict valueForKey:@"mp3"];  // will return audio/mpeg.

Please check this link for the list of MIME Types.