ASP中的XMLHTTP封装

<%
function getPage(url) 
	on error resume next 
	dim http 
	set http=Server.createobject("Microsoft.XMLHTTP") 
	Http.open "GET",url,false 
	Http.send() 
	if Http.readystate<>4 then
		exit function 
	end if 
	getPage=bytes2BSTR(Http.responseBody) 
	set http=nothing
	if err.number<>0 then err.Clear 
end function 

Function bytes2BSTR(vIn) 
	dim strReturn 
	dim i1,ThisCharCode,NextCharCode 
	strReturn = "" 
	For i1 = 1 To LenB(vIn) 
		ThisCharCode = AscB(MidB(vIn,i1,1)) 
		If ThisCharCode < &H80 Then 
			strReturn = strReturn & Chr(ThisCharCode) 
		Else 
		NextCharCode = AscB(MidB(vIn,i1+1,1)) 
		strReturn = strReturn & Chr(CLng(ThisCharCode) * &H100 + CInt(NextCharCode)) 
			i1 = i1 + 1 
		End If 
	Next 
	bytes2BSTR = strReturn 
End Function 


%>