我有一个程序,用户在其中输入带有 URL 编码查询字符串的完整 URL,并将其发送到网络。
我在 vb2005 中使用 httpwebrequest
我从网站上得到一个错误说I should send a content length
如果 URL 是http://www.someurl.com/query.php?q=somtext¶m1=paramtext¶m2=paramtext2
如何从 URL 获取内容长度,因为无法自动知道这一点?
编辑
我决定用这个,这对吗
Private Function GetHtmlFromUrl(ByVal url As String, _
Optional ByVal PostData As String = vbNullString) As String
If url.ToString() = vbNullString Then
Throw New ArgumentNullException("url", "Parameter is null or empty")
End If
Dim html As String = vbNullString
Dim myUrl As New System.Uri(url)
Dim request As HttpWebRequest = WebRequest.Create(url)
With request
.ContentType = "Content-Type: application/x-www-form-urlencoded"
.Method = "POST"
.UserAgent = "Mozilla/4.0 (MSIE 6.0; Windows NT 5.1)"
.Referer = "http://www.google.com"
.ContentLength = myUrl.Query.Length
End With
Try
Dim response As HttpWebResponse = request.GetResponse()
Dim reader As StreamReader = New StreamReader(response.GetResponseStream())
html = Trim$(reader.ReadToEnd)
Return html
Catch ex As WebException
Return ex.Message
End Try
End Function