如何生成自己的ASPHttp組件:
使用Winsock控件，下面將介紹怎麼來建立一個簡單的HTTP組件。
記住先選擇mswinsck.ocx控件,下面的代碼是在VB6中編譯的。
代碼如下：
PRivate WithEvents objWinSock As MSWinsockLib.Winsock
Private strURL As String
Private strURI As String
Private strServer As String
Private nPort As Long
Private strHead As String
Private strData As String
Private bConnected As Boolean
Public Function httpGet(URL As String) As String
Set objWinSock = New MSWinsockLib.Winsock
strURL = URL
ParseURL
Connect
SendRequest
objWinSock.Close
strHead = Left(strData, InStr(strData, vbCrLf & vbCrLf))
strData = Right(strData, Len(strData) - InStr(strData, vbCrLf & vbCrLf))
httpGet = strData
End Function
Private Sub ParseURL()
If LCase(Left(strURL, 7)) = "http://" Then
If InStr(8, strURL, "/") = 0 Then
strServer = Right(strURL, Len(strURL) - 7)
strURI = "/"
Else
strServer = Mid(strURL, 8, InStr(8, strURL, "/") - 8)
strURI = Right(strURL, Len(strURL) - InStr(8, strURL, "/") + 1)
End If
If InStr(strServer, ":") <> 0 Then
nPort = CLng(Right(strServer, Len(strServer) - InStr(strServer,
":")))
strServer = Left(strServer, InStr(strServer, ":") - 1)
End If
If nPort = 0 Then nPort = 80
Else
Err.Raise vbObjectError, "Error", "錯誤的URL"
End If
End Sub
Private Sub Connect()
Dim dtStart As Date
dtStart = Now()
objWinSock.RemoteHost = strServer
objWinSock.RemotePort = nPort
objWinSock.Connect
Do Until bConnected
DoEvents
If DateDiff("s", dtStart, Now) > 30 Then
Err.Raise vbObjectError, "Error", "連接超時"
End If
Loop
End Sub
Private Sub SendRequest()
Dim strCmd
Dim dtStart As Date
dtStart = Now()
strCmd = "GET " & strURI & " HTTP/1.0" & vbCrLf
strCmd = strCmd & "User-Agent: ASPHttp.http" & vbCrLf
strCmd = strCmd & "Accept: */*" & vbCrLf
strCmd = strCmd & vbCrLf
objWinSock.SendData strCmd
Do Until objWinSock.State = sckClosing
DoEvents
If DateDiff("s", dtStart, Now) > 60 Then
Err.Raise vbObjectError, "Error", "請求超時"
End If
Loop
End Sub
Public Property Get Head() As Variant
Head = strHead
End Property
Public Property Get Body() As Variant
Body = strData
End Property
Private Sub objWinSock_DataArrival(ByVal bytesTotal As Long)
Dim strTemp
objWinSock.GetData strTemp, vbString
strData = strData & strTemp
End Sub
Private Sub objWinSock_Connect()
bConnected = True
End Sub
Private Sub objWinSock_Error(ByVal Number As Integer, Description As String, _
ByVal Scode As Long, ByVal Source As String, ByVal HelpFile As String, _
ByVal HelpContext As Long, CancelDisplay As Boolean)
Err.Raise vbObjectError, "Error", "Winsock Error: " & Number &
vbCrLf & Description
CancelDisplay = True
End Sub
編譯該組件，然後按照下面的步驟注冊該組件
C:\net stop IISadmin /y
C:\mtxstop
編譯成Active Dll
C:\net start w3svc
在ASP中調用這個組件
<%@ Language=VBScript %>
<Html>
<HEAD>
<META NAME="GENERATOR" Content="Microsoft Visual Studio 6.0">
</HEAD>
<BODY>
<%
Dim obj
Set obj = Server.CreateObject("ASPHttp.http")
Response.Write obj.httpGet("http://www.chinaasp.com.cn")
%>
</BODY>
</Html>
