google新推出的sitemap，是对原来robots.txt的扩展，sitemap!使用xml格式来记录整个网站的信息并供google读取，使搜索引擎能更快更全面的收录网站的内容。
sitemap的作用就好像为网站提供了整站的rss，而google就是这些rss的订阅者，只要网站有更新就会自动通知google。这样一来，搜索引擎的收录由被动的pull变成了主动的push，辛苦的google爬虫们终于可以松一口气了。
快来尝试下：https://
www.google.com/webmasters/sitemaps/login 有Gmail的可以用Gmail直接登录。登录后把生成的xml文件地址提交就可以了。
本站生成后的sitemap.xml文件地址为
http://www.popdu.net/Sitemap.xml下面提供生成XML的Google SiteMap代码[ASP版本]。
程序代码： [ 复制代码到剪贴板 ]
<%
Server.ScriptTimeout=50000
' sitemap_gen.asp
' A simple script to automatically produce sitemaps for a webserver, in the Google Sitemap Protocol (GSP)
' by Francesco Passantino
'
www.iteam5.net/francesco/sitemap' v0.2 released 5 june 2005 (Listing a directory tree recursively improvement)
'
' BSD 2.0 license,
'
http://www.opensource.org/licenses/bsd-license.php' 收集整理: 重庆森林@im286.com
session("server")=http://www.Popdu.net '你的域名
vDir = "/" '制作SiteMap的目录,相对目录(相对于根目录而言)
set objfso = CreateObject("Scripting.FileSystemObject")
root = Server.MapPath(vDir)
'response.ContentType = "text/xml"
'response.write "<?xml version='1.0' encoding='UTF-8'?>"
'response.write "<urlset xmlns='http://www.google.com/schemas/sitemap/0.84'>"
str = "<?xml version='1.0' encoding='UTF-8'?>" & vbcrlf
str = str & "<urlset xmlns='http://www.google.com/schemas/sitemap/0.84'>"
& vbcrlf
Set objFolder = objFSO.GetFolder(root)
'response.write getfilelink(objFolder.Path,objFolder.dateLastModified)
Set colFiles = objFolder.Files
For Each objFile In colFiles
'response.write getfilelink(objFile.Path,objfile.dateLastModified)
str = str & getfilelink(objFile.Path,objfile.dateLastModified) & vbcrlf
Next
ShowSubFolders(objFolder)
'response.write "</urlset>"
str = str & "</urlset>" & vbcrlf
set fso = nothing
Set objStream = Server.CreateObject("ADODB.Stream")
With objStream
'.Type = adTypeText
'.Mode = adModeReadWrite
.Open
.Charset = "utf-8"
.Position = objStream.Size
.WriteText=str
.SaveToFile server.mappath("/sitemap.xml"),2 '生成的XML文件名
.Close
End With
Set objStream = Nothing
If Not Err Then
Response.Write("<script>alert('成功生成站点地图!');history.back();</script>")
Response.End
End If
Sub ShowSubFolders(objFolder)
Set colFolders = objFolder.SubFolders
For Each objSubFolder In colFolders
if folderpermission(objSubFolder.Path) then
'response.write getfilelink(objSubFolder.Path,objSubFolder.dateLastModified)
str = str & getfilelink(objSubFolder.Path,objSubFolder.dateLastModified) & vbcrlf
Set colFiles = objSubFolder.Files
For Each objFile In colFiles
'response.write getfilelink(objFile.Path,objFile.dateLastModified)
str = str & getfilelink(objFile.Path,objFile.dateLastModified) & vbcrlf
Next
ShowSubFolders(objSubFolder)
end if
Next
End Sub
Function getfilelink(file,datafile)
file=replace(file,root,"")
file=replace(file,"\","/")
If FileExtensionIsBad(file) then Exit Function
if month(datafile)<10 then filedatem="0"
if day(datafile)<10 then filedated="0"
filedate=year(datafile)&"-"&filedatem&month(datafile)&"-"&filedated&day(datafile)
getfilelink = "<url><loc>"&server.htmlencode(session("server")&vDir&file)&"</loc><lastmod>"&filedate&"</lastmod><changefreq>daily</changefreq><priority>1.0</priority></url>"
Response.Flush
End Function
Function Folderpermission(pathName)
'需要过滤的目录(不列在SiteMap里面)
PathExclusion=Array("\temp","\_vti_cnf","_vti_pvt","_vti_log","cgi-bin","\admin","\edu")
Folderpermission =True
for each PathExcluded in PathExclusion
if instr(ucase(pathName),ucase(PathExcluded))>0 then
Folderpermission = False
exit for
end if
next
End Function
Function FileExtensionIsBad(sFileName)
Dim sFileExtension, bFileExtensionIsValid, sFileExt
'modify for your file extension (http://www.googleguide.com/file_type.html)
Extensions = Array("png","gif","jpg","jpeg","zip","pdf","ps","html","htm","php","wk1","wk2","wk3","wk4","wk5","wki","wks","wku","lwp","mw","xls","ppt","doc","swf","wks","wps","wdb","wri","rtf","ans","txt")
'设置列表的文件名,扩展名不在其中的话SiteMap则不会收录该扩展名的文件
if len(trim(sFileName)) = 0 then
FileExtensionIsBad = true
Exit Function
end if
sFileExtension = right(sFileName, len(sFileName) - instrrev(sFileName, "."))
bFileExtensionIsValid = false 'assume extension is bad
for each sFileExt in extensions
if ucase(sFileExt) = ucase(sFileExtension) then
bFileExtensionIsValid = True
exit for
end if
next
FileExtensionIsBad = not bFileExtensionIsValid
End Function
%>
这样就有利于GOOGLE 的更快收录了：）
