Objective-c Check file size from URL without downloading

Question

I need to check the size of file from a URL. I get the file size perfectly when downloading file with AFNetworking.

AFHTTPRequestOperation *operation = [clie         


        

Answer 1

here is the code:

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:candidateURL];
                    [request setHTTPMethod:@"HEAD"];

                    AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
                    [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject)
                     {
                         NSLog(@"Content-lent: %lld", [operation.response expectedContentLength]);

                     } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
                         NSLog(@"Error: %@", error);
                     }];

Answer 2

If the server supports it you can make a request to just get the headers (HEAD, as opposed to GET) without the actual data payload and this should include the Content-Length.

If you can't do that then you need to start the download and use expectedContentLength of the NSURLResponse.

---

Basically, create an instance of NSMutableURLRequest and call setHTTPMethod: with the method parameter set to @"HEAD" (to replace the default which is GET). Then send that to the server as you currently request for the full set of data (same URL).