WebRequest.GetResponse - The remote server returned an error: (404) Not Found

Question

我正在尝试连接到一个网站，但它一直返回此错误，即使我可以在我的浏览器中访问该网站：

An exception of type 'System.Net.WebException' occurred in System.dll but was not handled in user code

Additional information: The remote server returned an error: (404) Not Found.

我很确定我的代码是正确的，因为我最近经常使用相同的代码，但无法弄清楚为什么会返回错误，有什么建议吗？我的代码：

OddsTodayREQUEST = WebRequest.Create("http://www.betexplorer.com/next/soccer/")
Using OddsTodayRESPONSE As WebResponse = OddsTodayREQUEST.GetResponse()
            Using OddsTodayREADER As New StreamReader(OddsTodayRESPONSE.GetResponseStream())
                OddsTodayHTML = OddsTodayREADER.ReadToEnd()
            End Using
        End Using

Answer 1

站点希望将用户代理添加到请求中。您可以 google What's my user agent? 找到自己的并像这样添加：

OddsTodayREQUEST.UserAgent = "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; Trident/6.0)"

Answer 2

你需要添加UserAgent as ，除了他的回答，最好使用HttpWebClient 的AutomaticDecompression 属性并且你可以添加Accept header。我还在 Using 语句中使用了 OddsTodayRESPONSE.GetResponseStream()。

Dim OddsTodayREQUEST As HttpWebRequest = WebRequest.Create("http://www.betexplorer.com/next/soccer/")
OddsTodayREQUEST.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"
OddsTodayREQUEST.AutomaticDecompression = DecompressionMethods.GZip Or DecompressionMethods.Deflate 'Decompressing makes the request be done faster
OddsTodayREQUEST.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:55.0) Gecko/20100101 Firefox/55.0"
Using OddsTodayRESPONSE As HttpWebResponse = OddsTodayREQUEST.GetResponse()
    Using OddsTodayRESPONSESTREAM = OddsTodayRESPONSE.GetResponseStream()
        Using OddsTodayREADER As New StreamReader(OddsTodayRESPONSESTREAM)
            OddsTodayHTML = OddsTodayREADER.ReadToEnd()
        End Using
    End Using
End Using

WebRequest.GetResponse - The remote server returned an error: (404) Not Found

WebRequest.GetResponse - The remote server returned an error: (404) Not Found

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webrequest