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ASP实用技巧:强制刷新和判断文件地址

2019-09-13 20:14:55来源:励志吧0次阅读

强制刷新网页

<%

’强制性刷新随机验证码

’让随机验证码每次按IE的后退按钮时,返回登录页面的随即码都自动刷新,

Response.expires=-1

Response.AddHeader"pragma","no-cache"

Response.AddHeader"cache-control","no-store"

%>

判断文件地址是否有效

<%

’原创作者:小艺 QQ:52093 时间:2005.6.30

Response.Write("<head><style><!--span{ font-size: 9pt }--></style></head>")

On Error Resume Next

Dim thisurl,thistext

thisurl=Request("thisurl") ’定义文件地址(非Html格式文档)!

if thisurl="" then

Response.Write("<span>请先输入文件地址!</span>")

Response.End

End if

Function objxmlhttp(xmlurl)

On Error Resume Next

Set objxml = CreateObject("Microsoft.XMLHTTP")

objxml.Open "get",xmlurl,false

objxml.setrequestheader "content-type","application/x-www-form-urlencoded"

objxml.send

objxmlhttp = objxml.responsebody

if Err then

Err.Clear

Response.Write("<span>建立连接失败,文件不存在或网络有问题!;错误原因:"&Err.Description&"!</span>")

Response.End

End if

End Function

Function bytes2BSTR(vIn)

strReturn = ""

For i = 1 To LenB(vIn)

ThisCharCode = AscB(MidB(vIn,i,1))

If ThisCharCode < &H80 Then

strReturn = strReturn & Chr(ThisCharCode)

Else

NextCharCode = AscB(MidB(vIn,i+1,1))

strReturn = strReturn & Chr(CLng(ThisCharCode) * &H100 + CInt(NextCharCode))

i = i + 1

End If

Next

bytes2BSTR = strReturn

End Function

thisurl2=Split(thisurl,",")

For Each ii In thisurl2

thistext=bytes2BSTR(objxmlhttp(ii))

if InStr(thistext,"<html>")<>0 then

Response.Write("<span>"& ii &" <b>×</b></span><br>")

Else

Response.Write("<span>"& ii &" <b>√</b></span><br>")

End if

Next

if Err then

Err.Clear

Response.Write("<span>碰到意外!;错误原因:"&Err.Description&"!</span>")

Response.End

End if

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