Entries Tagged as "ColdFusion"

ColdFusion 8: Watermarks, Transparency & Resizing

Posted by David in ColdFusion on August 22, 2007

I wanted to share some code examples that I have come across within the past few weeks regarding the new functionality in ColdFusion 8. My first example will be using the following functions: ImageRead(), ImageSetAntialiasing(), ImageScaleToFit(), ImageSetDrawingTransparency(), ImageGetWidth(), ImageGetHeight(), and finally ImagePaste(). Ok, here we go...

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Error when cflocation is ran within onRequestStart

Posted by David in ColdFusion on April 24, 2007

There is some code in one of the projects I am working on that checks if a user is logged in within the onRequestStart application function. If the user is not logged in, the code redirects them to the login page using a cflocation. Although there is no visual error, i kept getting error emails thru my onError function stating there was a coldfusion.runtime.AbortException error happening:

An exception occurred when invoking a event handler method from Application.cfc The method name is: onRequestStart.

Reading various posts on this error on the web, I found that the this problem is well known and found some work-arounds. Here is one of them...

Within your onError function you can filter out the AbortException errors by doing this:

<cffunction name="onError" returntype="void">
   <cfargument name="exception" required="true">
   <cfargument name="eventname" type="string" required="true">

   <cfswitch expression="#arguments.exception.rootcause.type#">
      <cfcase value="coldfusion.runtime.AbortException">
         <!--- do nothing --->
         <cfreturn />
      </cfcase>
      <cfdefaultcase>
         <!--- error handling code here --->
         <cfdump var="#exception#" label="Exception">
      </cfdefaultcase>
   </cfswitch>
   
</cffunction>

That did the trick!

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cfPicasa not working all of a sudden? This may be the fix!

Posted by David in ColdFusion on March 30, 2007

I use cfPicasa, by Charles Toro, on one of my websites to connect to my Google Picasa web albums. A couple of weeks ago, it stopped working for me. The albums listed fine, but when you would go into the album, you would get a " Element PHOTO:IMGSRC is undefined in a Java object of type class coldfusion.xml.XmlNodeList" error.

I looked into the error more and it seems that Google updated their RSS structures in the feeds for the album details. Anyways, its a pretty quick fix, so here is what you have to do to make it work again:

Change the getAlbumXML function in cfPicasa.cfc from this:

<cffunction name="getAlbumXML" access="public" output="false" hint="This parses then queries your album XML.">
   <!--- Grab passed variable and fetch RSS link --->
   <cfargument name="rsslink" type="string" required="yes">
   <cfset variables.picasaURL["album"] = toString(toBinary(arguments.rsslink))>
   
   <cfhttp url="#variables.picasaURL["album"]#"
      method="GET"
      timeout="15">
   </cfhttp>
   <!--- Now lets parse the XML file --->
   <cfset albumXML = trim(cfhttp.filecontent)>
   <cfset albumXML = XMLparse(albumXML)>
   <!--- Create a query and loop the results --->
   <cfset qAlbum = QueryNew("photo_imgsrc,photo_thumbnail")>
   <cfset queryAddRow(qAlbum, ArrayLen(albumXML.rss.channel.item))>
      <cfloop from="1" to="#ArrayLen(albumXML.rss.channel.item)#" index="i">
         <cfloop from="1" to="#listLen(qAlbum.columnList)#" index="n">
            <cfset querySetCell(qAlbum, listGetAt(qAlbum.columnList, n), albumXML.rss.channel.item[i][listGetAt(ReplaceList("#qAlbum.columnList#", "_", ":"), n)].XMLText, i)>
         </cfloop>
      </cfloop>
      <!--- Time to query the query --->
      <cfquery name="rqAlbum" dbtype="query">
         SELECT *
         FROM qAlbum
      </cfquery>
   
   <cfreturn rqAlbum>
</cffunction>

To this:

<cffunction name="getAlbumXML" access="public" output="true" hint="This parses then queries your album XML.">
   <!--- Grab passed variable and fetch RSS link --->
   <cfargument name="rsslink" type="string" required="yes">
   <cfset variables.picasaURL["album"] = toString(toBinary(arguments.rsslink))>
   
   <cfhttp url="#variables.picasaURL["album"]#"
      method="GET"
      timeout="15">
   </cfhttp>
   <!--- Now lets parse the XML file --->
   <cfset albumXML = trim(cfhttp.filecontent)>
   <cfset albumXML = XMLparse(albumXML)>
   <!--- Create a query and loop the results --->
   <cfset qAlbum = QueryNew("media_content,media_thumbnail")>
   <cfset queryAddRow(qAlbum, ArrayLen(albumXML.rss.channel.item))>
      <cfloop from="1" to="#ArrayLen(albumXML.rss.channel.item)#" index="i">
         <cfloop from="1" to="#listLen(qAlbum.columnList)#" index="n">
            <cfset querySetCell(qAlbum, listGetAt(qAlbum.columnList, n), albumXML.rss.channel.item[i]["media:group"][listGetAt(ReplaceList("#qAlbum.columnList#", "_", ":"), n)].XmlAttributes.url, i)>
         </cfloop>
      </cfloop>
      <!--- Time to query the query --->
      <cfquery name="rqAlbum" dbtype="query">
         SELECT *
         FROM qAlbum
      </cfquery>
   
   <cfreturn rqAlbum>
</cffunction>

What i did was change what qAlbum is set to as well as change the element structure when setting the querySetCell code. You have to add the "media:group" element to get things going again... Make sure you change your display code from #photo_imgsrc# and #photo_thumbnail# to #media_content# and #media_thumbnail# respectively.

Let me know if you have any questions!

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