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asp实用技巧：强制刷新和判断文件地址
强制刷新网页
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’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
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’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
%＞
