We have a service whereby users upload images to our website. We've designed a
flash player 8 upload system that uses cffile operations.
However, if more than one user is uploading images at the same time, coldfusion
can hang and the coldfusion service has to be restarted. We are NOT currently
using cflock as we didn't want to slow down the system under load but feel that
this may be reason that:
1. We are occasionally losing the temp directory
2. ColdFusion hangs.
Here's a summary of the cffile code that we use...
<!--- this code is a hack. Occasionally the temp folder would completely
disappear and in its place there would appear a temp file. This code checks for
the existance of the temp folder, if not there, then it would delete the temp
file that's there in its place, and then it creates the temp folder --->
<cfset TempStorage = ExpandPath("../../UserImages/Temp")>
<cfif DirectoryExists(tempStorage)>
<cfelse>
<!--- See if the temp file exists, if so, delete it so that the temp
folder can be made --->
<cfif fileexists(Expandpath("../../UserImages/Temp"))>
<cfset deletefile =ExpandPath("../../UserImages/Temp")>
<cffile action="delete" file="#deletefile#">
</cfif>
<cfset xDirectory = ExpandPath("../../UserImages/Temp")>
<CFDIRECTORY ACTION="create" directory="#xDirectory#">
</cfif>
<!--- Next, we upload the image saving it with a unique filename --->
<cffile action="UPLOAD" filefield="Filedata"
destination="#variables.TempStorage#" nameconflict="MakeUnique">
<!--- Then we move this file to the user's directory --->
<cffile action="move" source="#variables.OldFilePath#"
destination="#variables.NewFilePath#">
Any advice as to why and where we should use cflock would be greatly
appreciated. Many thanks!
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