错误的请求400-有效网址上的协议错误-Webclient [英] Bad Request 400 - protocol error on a valid url - Webclient
本文介绍了错误的请求400-有效网址上的协议错误-Webclient的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在尝试解析此页面( http:// www。 coleparmer.co.uk/Product/Turb_Std_Hach_2100q_Kit/WZ-99900-47 )
使用webclient却没有运气。
I am trying to parse this page (http://www.coleparmer.co.uk/Product/Turb_Std_Hach_2100q_Kit/WZ-99900-47) using webclient and am having no luck.
var client = new WebClient();
var html = client.DownloadString("http://www.coleparmer.co.uk/Product/Turb_Std_Hach_2100q_Kit/WZ-99900-47");
推荐答案
需要设置适当的标题。
try
{
string html;
using (WebClient client = new WebClient())
{
client.Headers.Add("Accept-Language", " en-US");
client.Headers.Add("Accept", " text/html, application/xhtml+xml, */*");
client.Headers.Add("User-Agent", "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)");
html = client.DownloadString("http://www.coleparmer.co.uk/Product/Turb_Std_Hach_2100q_Kit/WZ-99900-47");
}
}
catch (WebException ex)
{
if (ex.Status == WebExceptionStatus.ProtocolError && ex.Response != null)
{
var resp = (HttpWebResponse)ex.Response;
if (resp.StatusCode == HttpStatusCode.NotFound) // HTTP 404
{
//Handle it
}
}
//Handle it
}
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