A BrainTeaser for ya...

[Mike G]

So, I have a page where folks are submitting shipment info and getting a label back to the browser in pdf format using cfcontent, cfheader in a separate page called getLabels.cfm.  All the shipment processing is Ajaxy and wonderful, and at the end a bit of javascript says...

window.location.replace("/pathTo/getShippingLabel.cfm?invoice="+o.invoice);

Simple and easy, normal stuff, been there, done that a million times..

<cfheader name="Content-Disposition" value="attachment; filename=labels-#url.invoice#.pdf">
<cfcontent type="application/unknown" file="#application.props.getproperty("labelsPath","")##url.invoice#.pdf">

So, here is the brain teaser. (and yeah, I left all the other code out)

When the label pdf doesn't exist, how to I stop the original calling page from going to getLabels.cfm and displaying "File not found" message?  I want the user to stay on the page they are working in.

Instead I would like to do this in getLabels.cfm

<cfif not fileexists("#application.props.getproperty("labelsPath","")##url.invoice#.pdf")>

Do something magic and abort the request so the page doesn't change

<cfelse>

<cfheader name="Content-Disposition" value="attachment; filename=labels-#url.invoice#.pdf">
<cfcontent type="application/unknown" file="#application.props.getproperty("labelsPath","")##url.invoice#.pdf">

</cfif>

in 20 years of CF, I have never tried this...

M

[james....@bakerbotts.com]

I think you already answered your own question…

 

“Do something magic and ABORT the request so the page doesn’t change”

 

</cfabort>, maybe trigger a warning message to appear that something’s gone wrong…

 

From: hou...@googlegroups.com <hou...@googlegroups.com> On Behalf Of Mike G
Sent: 12 July, 2019 11:41 AM
To: hou...@googlegroups.com
Subject: [houcfug] A BrainTeaser for ya...

 

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