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ColdFusion 2018 onRequestEnd CFOutput issue

New Here ,
Oct 11, 2022 Oct 11, 2022

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When I try to get a page content by getPageContext().getCFOutput().getString() in onRequestEnd event, I get an empty string.

When I try to get a page content at the end of cfm script by the same code, I get what I expect: not empty content.

Application.cfc:

...

 

<cffunction name="onRequestEnd" output="false" returntype="void" >
    <cfargument type="String" name="targetPage" required=true />

    <cfdump var="getPageContext().getCFOutput().getString() in onRequestEnd: [#getPageContext().getCFOutput().getString()#]" output="C:\debug\debug_test_log.html" format="html" />
</cffunction>

 

...

test.cfm:

 

 

blah blah blah
<cfdump var="getPageContext().getCFOutput().getString() in test.cfm: [#getPageContext().getCFOutput().getString()#]" output="C:\debug\debug_test_log.html" format="html" />

 

 

The debug output (dumped into file) is following:

getPageContext().getCFOutput().getString() in test.cfm: [blah blah blah ]
getPageContext().getCFOutput().getString() in onRequestEnd: []

 

Any idea why it is empty in onRequestEnd event?

I remember it was working as expected in previous CF server versions and I was able to modify or cache an output before sending to a client.

 
 

 

 

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Community Expert ,
Oct 13, 2022 Oct 13, 2022

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The cfdump tag in test.cfm might be messing things up for you.

Comment it out and see whether that helps.

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Community Expert ,
Oct 13, 2022 Oct 13, 2022

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quote

The cfdump tag in test.cfm might be messing things up for you.

Comment it out and see whether that helps.


By @BKBK

 

What I mean is, try something like:

<cfoutput>blah blah blah</cfoutput>

<!---
<cfdump etc.>
--->

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New Here ,
Oct 13, 2022 Oct 13, 2022

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BKBK, thank you for your response!

cfdump tag in test.cfm doesn't affect, I checked.

What I found is output="false" parameter in onRequestEnd function. It does affect.

If I change it to output="true" or omit it entirely, it starts working fine, I get the output content.

In case of output="true" it dumps the content generated only inside onRequestEnd function and ignores the output from test.cfm file.

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New Here ,
Oct 13, 2022 Oct 13, 2022

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Sorry, typo... Should be:

In case of output="false" it dumps the content generated only inside onRequestEnd function and ignores the output from test.cfm file.

 
 

 

 

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Community Expert ,
Oct 13, 2022 Oct 13, 2022

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And if bkbk's helpful idea doesn't pan out, another sanity check would be to create a new folder, with that test page (doing absolutely nothing but that blah blah, before or after), and an Application.cfc doing also nothing but that onrequestend method (and not extending any other cfc). Does the function still fail to produce any result?

 

If that works, then clearly something else in your app.cfc (or any you extend/inherit from) or something in your test cfm is impacting your first efforts.

 

If that's the case (or if it fails to work also in this other test), what if you wrap the blah blah in a cfoutput? Not that you should have to, but does it make any difference? Just tossing out diagnostics to try, not solutions for now. 


/Charlie (troubleshooter, carehart.org)

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New Here ,
Oct 13, 2022 Oct 13, 2022

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It was output="false" parameter in OnRequestEnd

Once I change it to output="true" or omit it entirely, it resolves the issue.

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Community Expert ,
Oct 13, 2022 Oct 13, 2022

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quote

It was output="false" parameter in OnRequestEnd

 

By @sergey_croitor

 

What's in a name!

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New Here ,
Oct 13, 2022 Oct 13, 2022

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In case of output="false" in onRequestEnd it dumps the content generated only inside onRequestEnd function and ignores the output from test.cfm file.

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New Here ,
Oct 13, 2022 Oct 13, 2022

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And thank you for your response, Charlie!

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Community Expert ,
Oct 13, 2022 Oct 13, 2022

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Community Expert ,
Oct 13, 2022 Oct 13, 2022

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Sorry, @Charlie Arehart and @sergey_croitor. My forum page didn't refresh. So I missed your your recent posts. Please, ignore what I said. 

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New Here ,
Oct 13, 2022 Oct 13, 2022

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onRequestEnd.png

@BKBK, in my case the highlighted parameter was the reason of issue. Do you have it defined in your onRequestEnd?

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Community Expert ,
Oct 13, 2022 Oct 13, 2022

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FWIW, I had noticed that, but since you were doing a cfdump to a file, I presumed it may not impact. But are you saying even with that false, and a cfoutput around your blah blah, the it still didn't dump anything (from within that onrequestend)? 


/Charlie (troubleshooter, carehart.org)

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New Here ,
Oct 13, 2022 Oct 13, 2022

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@Charlie Arehart, with output="false" it dumps only what is inside OnRequestEnd. It ignores the content from test.cfm. In browser I see the opposite: the content from test.cfm only, without the content from onRequestEnd.

A bit confusing  🙂 Anyway output="true" resolves my issue.

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