使用WebRequest的System.Net.WebException

Question

我正在努力尝试使用WebRequest类来获取downloading.It工作的句柄网址，除了当我输入诸如https://soundcloud.com/top-bollywood-songs/atif-aslam-mashup-full-song-dj (最后一段扩展名)之类的链接时，它抛出System.Net.WebException并返回“The remote server return an error：(400) Bad Request”。

  WebResponse response = (WebResponse)request.GetResponse();

请提建议！

Answer 1

您可以添加用户代理。以下是一个工作示例：

protected string getHTML(string url)
{
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);

            // ******  Add the this line! ****//
            request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)";

            // Set some reasonable limits on resources used by this request
            request.MaximumAutomaticRedirections = 4;
            request.MaximumResponseHeadersLength = 4;
            // Set credentials to use for this request.
            request.Credentials = CredentialCache.DefaultCredentials;
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();

            // Get the stream associated with the response.
            Stream receiveStream = response.GetResponseStream();

            // Pipes the stream to a higher level stream reader with the required encoding format. 
            StreamReader readStream = new StreamReader(receiveStream, Encoding.UTF8);

            string html = readStream.ReadToEnd();
            response.Close();
            readStream.Close();
            return html;
}