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Earlier today Yahoo and Google announced their collaboration on Sitemaps.org. Sitemaps provide a way to describe to a search engine what pages make up your web site. I've had sitemap support in BlogCFC for a while, but today I wrote a little UDF you can use to generate sitemap xml. It will take either a list of URLs or a query of URLs. Enjoy. I'll post it to CFLib later in the week.

<cffunction name="generateSiteMap" output="false" returnType="xml">
   <cfargument name="data" type="any" required="true">
   <cfargument name="lastmod" type="date" required="false">
   <cfargument name="changefreq" type="string" required="false">
   <cfargument name="priority" type="numeric" required="false">
   
   <cfset var header = "<?xml version=""1.0"" encoding=""UTF-8""?><urlset xmlns=""http://www.sitemaps.org/schemas/sitemap/0.9"">">
   <cfset var result = header>
   <cfset var aurl = "">
   <cfset var item = "">
   <cfset var validChangeFreq = "always,hourly,daily,weekly,monthly,yearly,never">
   <cfset var newDate = "">
   <cfset var tz = getTimeZoneInfo().utcHourOffset>
   
   <cfif structKeyExists(arguments, "changefreq") and not listFindNoCase(validChangeFreq, arguments.changefreq)>
      <cfthrow message="Invalid changefreq (#arguments.changefreq#) passed. Valid values are #validChangeFreq#">
   </cfif>

   <cfif structKeyExists(arguments, "priority") and (arguments.priority lt 0 or arguments.priority gt 1)>
      <cfthrow message="Invalid priority (#arguments.priority#) passed. Must be between 0.0 and 1.0">
   </cfif>
   
   <!--- reformat datetime as w3c datetime / http://www.w3.org/TR/NOTE-datetime --->
   <cfif structKeyExists(arguments, "lastmod")>         
      <cfset newDate = dateFormat(arguments.lastmod, "YYYY-MM-DD") & "T" & timeFormat(arguments.lastmod, "HH:mm")>
      <cfif tz gte 0>
         <cfset newDate = newDate & "-" & tz & ":00">
      <cfelse>
         <cfset newDate = newDate & "+" & tz & ":00">
      </cfif>      
   </cfif>
   
   <!--- Support either a query or list of URLs --->
   <cfif isSimpleValue(arguments.data)>
      <cfloop index="aurl" list="#arguments.data#">
         <cfsavecontent variable="item">
<cfoutput>
<url>
   <loc>#xmlFormat(aurl)#</loc>
   <cfif structKeyExists(arguments,"lastmod")>
   <lastmod>#newDate#</lastmod>
   </cfif>
   <cfif structKeyExists(arguments,"changefreq")>
   <changefreq>#arguments.changefreq#</changefreq>
   </cfif>
   <cfif structKeyExists(arguments,"priority")>
   <priority>#arguments.priority#</priority>
   </cfif>
</url>
</cfoutput>
         </cfsavecontent>
         <cfset item = trim(item)>
         <cfset result = result & item>
      </cfloop>
      
   <cfelseif isQuery(arguments.data)>
      <cfloop query="arguments.data">
         <cfsavecontent variable="item">
<cfoutput>
<url>
   <loc>#xmlFormat(url)#</loc>
   <cfif listFindNoCase(arguments.data.columnlist,"lastmod")>
      <cfset newDate = dateFormat(lastmod, "YYYY-MM-DD") & "T" & timeFormat(lastmod, "HH:mm")>
      <cfif tz gte 0>
         <cfset newDate = newDate & "-" & tz & ":00">
      <cfelse>
         <cfset newDate = newDate & "+" & tz & ":00">
      </cfif>      
      <lastmod>#newDate#</lastmod>
   </cfif>
   <cfif listFindNoCase(arguments.data.columnlist,"changefreq")>
   <changefreq>#changefreq#</changefreq>
   </cfif>
   <cfif listFindNoCase(arguments.data.columnlist,"priority")>
   <priority>#priority#</priority>
   </cfif>
</url>
</cfoutput>
         </cfsavecontent>
         <cfset item = trim(item)>
         <cfset result = result & item>
      
      </cfloop>
   </cfif>
   
   <cfset result = result & "</urlset>">
   
   <cfreturn result>
   
</cffunction>

Comments (21) Nov 16, 2006 9:38 PM Views: 3149

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