从短URL下载文件

时间:2009-02-07 16:06:12

标签: cocoa-touch short-url

我想从短网址下载声音文件(例如:www.adjix.com) 当我尝试从普通链接,它没关系,但从短网址,如何首先重定向,然后下载

我使用这部分代码来创建请求:

NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:urlToSound]];

NSURLConnection *theConnection =[[NSURLConnection alloc] initWithRequest:theRequest delegate:self];

if (theConnection) {
    self.receiveData = [[NSMutableData data] retain];
}

此代码可以查看标题:

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{
    [receiveData setLength:0];

    if ([response isKindOfClass:[NSHTTPURLResponse self]]  ) {
        NSDictionary *headers = [(NSHTTPURLResponse *)response allHeaderFields];
        NSLog(@"headers: %@", headers);
   }
}

当我尝试直接下载时,链接到MP3标题是:

    "Accept-Ranges" = bytes;
    Connection = "Keep-Alive";
    "Content-Length" = 21316;
    "Content-Type" = "audio/mpeg";
    Date = "Sat, 07 Feb 2009 16:01:34 GMT";
    Etag = "\"2d810-5344-7dda240\"";
    "Keep-Alive" = "timeout=15, max=100";
    "Last-Modified" = "Sat, 25 Jun 2005 12:26:41 GMT";
    Server = Apache;

当我尝试使用短网址(adjix.com/3na3)下载文件时,标题为:

    "Cache-Control" = "max-age=60";
    Connection = close;
    "Content-Length" = 692;
    "Content-Type" = "text/html";
    Date = "Sat, 07 Feb 2009 19:18:23 GMT";
    Expires = "Sat, 07 Feb 2009 19:19:23 GMT";
    Server = "Apache/1.3.41 (Darwin) mod_ssl/2.8.31 OpenSSL/0.9.7l";

3 个答案:

答案 0 :(得分:0)

您能提供更多信息吗?特别是,最好提及您用于执行HTTP请求的类,以及使用重定向URL时会出现什么情况。

答案 1 :(得分:0)

您可能想尝试GTMHTTPFetcher类,它是Google Toolbox for Mac的一部分。它为您处理重定向。

答案 2 :(得分:0)

NSURLConnection有一个委托方法,您可以专门实现该方法来处理重定向。但是,由于您的请求的用户代理字符串,您连接的服务器可能会有不同的行为。