I have a page where a query resultset of various documents to be emailed or
faxed to clients is being looped over. These can take up to 10 seconds to
process, so I flush the progress to the browser so the user can see that
document x of y total has been sent (or has failed). Y is usually 200, and
never more than that.
This is infrequent, but sometimes the flush just stops flushing to the browser
during a random iteration in the loop, even though the process is still running
in the background and runs all the way to completion. I'm using CF8, viewing on
IE9 (I have also viewed on IE8; I have yet to see this happen using IE8. So far
has only happened on IE9).
I use divs to mimic table rows, as IE will not flush actual table rows one at a
time; it waits until the whole table is done and only then renders it to the
screen. I also set a very low interval so it doesn't wait too long before
flushing the next bit of html. My code basically looks like this (btw - I
didn't see any tags to enclode a codeblock; will try to keep this neat...):
<cfset objDocSender = createObject(some cfc)>
<cfflush interval=10>
<cfoutput>
Processing documents...#repeatString(" ", 100000)# <!---this to force IE to
render--->
</cfoutput>
<cfoutput>
<div id="row">
<div id="cell" class="header">Work Request ID</div><div id="cell"
class="header">Delivery Method</div><div id="cell"
class="header">Success</div><div id="cell" class="header">Progress</div>
</div>
</cfoutput>
<cfloop query="qryDocsToSend">
<cftry>
<cfset blnSuccess['#qryDocsToSend.DocID[currentrow]#'] =
objDocSender.sendDocument(#qryDocsToSend.DocID[currentrow]#,
'#qryDocsToSend.Delivery_Method[currentrow]#')>
<cfcatch>
<cfset blnSuccess['#qryDocsToSend.DocID[currentrow]#'] = false>
</cfcatch>
</cftry>
<cfoutput>
<div id="row"<cfif NOT blnSuccess['#qryDocsToSend.DocID[currentrow]#']>
class="red"</cfif>>
<div id="cell">#qryDocsToSend.DocID[currentrow]#</div><div
id="cell">#qryDocsToSend.Delivery_Method[currentrow]#</div><div id="cell"><cfif
blnSuccess['#qryDocsToSend.DocID[currentrow]#']>Y<cfelse>N</cfif></div><div
id="cell">#qryDocsToSend.currentrow# of #qryDocsToSend.recordcount#
processed.</div>
</div>
</cfoutput>
<cfif blnSuccess['#qryDocsToSend.DocID[currentrow]#'] NEQ true>
<cfset intNumFailed = intNumFailed + 1>
<cfset lstFailedIDs = listAppend(lstFailedIDs,
'#qryDocsToSend.DocID[currentrow]#')>
</cfif>
</cfloop>
<cfoutput>
<br>
<div style="clear:both;">
<br>#qryWRsToSend.recordcount - IntNumFailed# record<cfif
qryWRsToSend.recordcount - IntNumFailed NEQ 1>s were<cfelse> was</cfif>
sent.<br>
<cfif intNumFailed GT 0>
#IntNumFailed# failed.<br>
</cfif>
</div>
</cfoutput>
Has anyone else experienced this kind of behavior with cfflush?
Thanks,
Christophe
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