Prevent memory leak when using cfimage and cfxml? - memory-leaks

Question

I'm doing a site in coldfusion8/mysql 5.0.88 with the front end in Jquery Mobile. I'm also using the photoswipe.js plugin, which allows images to be zoomed and browsed in a separate view layer.
To setup photoswipeable images, I need to output
<cfoutput>
<a class="swipeMe" rel="external" href="#variables.imageSrc#">
<img src="#variables.imageSrc#" class="adaptImg ui-li-thumb" />
</a>
</cfoutput>
The problem is imageSrc is supplied by users, so I have to grab/validate/resize the image before displaying it AND I need the path of the image for the photoswipe-link.
I have been fiddling with this for a while and came up with the following solution:
// read img from user specs
<cfimage name="myImage" source="#bildpfad##bilddateiname#" action="read" />
<cfif IsImage(myImage) is true>
// resize
<cfscript>
ImageSetAntialiasing(myImage,"on");
variables.breite = 400;
ImageScaleToFit(myImage, variables.breite,"", "highestPerformance");
</cfscript>
// write to xml, so I can get the path
<cfxml variable="imageXml">
<cfimage quality=".5" action="writetobrowser" source="#myImage#" class="adaptImg ui-li-thumb"/
</cfxml>
<cfset variables.imageSrc = imageXml.xmlRoot.xmlAttributes.src>
// output
<cfoutput>
<a class="swipeMe" rel="external" href="#variables.imageSrc#">#imageXml#</a>
</cfoutput>
</cfif>
While this works it pretty much stalls the application and memory seems to leak as well, because I'm loosing more and more memory as I'm running this.
Question:
Is there any obvious problem with the above code causing memory leaks? I imagin the images are being written to some sort of temporary directory (CFFileservelet?) and stay there for a while blocking my memory. If so, what would be alternative approaches to handling this in an image search?
Thanks!

Answer 1

Why not just create a /tmp folder on your server, and write the manipulated images there, like:
<cfset newImageName=CreateUUID()&".jpg">
<cfimage action="write" destination="/tmp/#newImageName#" source="#myImage#">
Then you can use it:
<cfoutput>
<a class="swipeMe" rel="external" href="/tmp/#newImageName#"><img src="/tmp/#newImageName#" class="..."></a>
</cfoutput>
Sample scheduled task to delete temp files:
<cfdirectory action="LIST" directory="#expandpath('tmp/')#" name="tempfiles" filter="*.jpg">
<cfloop query="tempfiles">
<cfif dateadd('h',24,dateLastModified) lt now()>
<cffile action="DELETE" file="#expandpath('tmp/')##name#">
</cfif>
</cfloop>