Question

我有一个简单的指挥线应用程序,测试档案的存在。然而,这些档案非常庞大,我要核实,它们没有下载整个档案。这是我掌握的,但下载了每个档案:

            NSURL *url = [NSURL URLWithString:downloadPath];
            NSURLRequest *request = [NSURLRequest requestWithURL:url];
            NSURLResponse *response = nil;
            NSError **error=nil; 
            NSData *data=[[NSData alloc] initWithData:[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:error]];

            NSInteger httpStatus = [((NSHTTPURLResponse *)response) statusCode];

            if(httpStatus == 404)
            {
                NSLog(@"%@ NOT FOUND!",[productDic objectForKey:@"fileName"]);

            }

The files I am looking for are .zip and are not found locally.

Answer 1

如果你提出“欧洲复兴开发银行”要求,而不是“GET”要求,你可能会在以下几段之后得到:

NSMutableURLRequest *request = [[NSURLRequest requestWithURL:url] mutableCopy];
[request setHTTPMethod:@"HEAD"];
[request autorelease];

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