Quick tip with cfpop and debugging

I’m working on some code to generate EML files dynamically. My goal is to use cfpop to read messages and provide a quick ‘Download’ link that will generate an EML file. These files can then be opened in a native desktop client like any other mail. I’ve got that part working (and will be blogging it soon), but when I went to test against real email, I ran into an interesting issue.

For my testing I hit a gmail account. Now - that by itself provides a bit of a problem because cfpop doesn’t support SSL. You can get around it with a bit of Java (and forgive me for not citing the person who did this code - when I googled it I found 2-3 solutions from our community).

<cfset javaSystem = createObject("java", "java.lang.System") /> <cfset jProps = javaSystem.getProperties() /> <cfset jProps.setProperty("mail.pop3.socketFactory.class", "javax.net.ssl.SSLSocketFactory") /> <cfset jProps.setproperty("mail.pop3.port",995) /> <cfset jProps.setProperty("mail.pop3.socketFactory.port", 995) /> <cfpop action="getAll" name="messages" server="pop.gmail.com" username="bob@camdenfamily.com" password="moo" port="995">

I ran the code and it worked perfectly. Once. I looked in my browser that had the gmail account open and I could still see the emails there, so I know CF didn’t delete anything. I sent the account another email. Ran my CFM - saw it return just the new email - and on a reload the result was blank again. In GMail you have settings for what to do when mail is accessed via POP, but I had configured this to simply leave it as is.

On a whim, I double checked the docs for cfpop and noticed that it includes a debug attribute. I had a vague recollection of this attribute but never actually used it. I turned it on and noticed something pretty interesting.

First off - debug will log all of the POP commands and results. Here is a snippet.

DEBUG: setDebug: JavaMail version 1.4.2 DEBUG: getProvider() returning javax.mail.Provider[STORE,pop3,com.sun.mail.pop3.POP3Store,Sun Microsystems, Inc] DEBUG POP3: connecting to host "pop.gmail.com", port 995, isSSL false S: +OK Gpop ready for requests from 76.72.15.75 i1pf10228089yhm.15 C: USER bob@camdenfamily.com S: +OK send PASS C: PASS foo S: +OK Welcome. C: STAT S: +OK 1 2108 C: UIDL

The STAT command returns the number of messages and the size. I noticed that after I ran cfpop and it read the email, and then I ran it again, I would get:

C: STAT S: +OK 0 0 C: QUIT S: +OK Farewell.

This seems to imply that GMail did something to my messages after CFPOP read them. Oddly - in my browser - where I was just looking at the list of messages and not reading anything - still showed all the email as new and unread. When I looked at the commands CFPOP sent in for when it did find a message, all it did was a TOP and a RETR. From my reading of the docs, RETR gets a message, but doesn't do anything else to it. In other words, it's not deleting it for sure.

Unfortunately at this point I didn't know what else to do. It was certainly interesting to see all the behind the scenes POP calls with the debug attribute though. I ended up simply signing up for an AOL account. When I tested there (it also needs the SSL hack) it worked perfectly.

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About Raymond Camden

Raymond is a developer advocate. He focuses on JavaScript, serverless and enterprise cat demos. If you like this article, please consider visiting my Amazon Wishlist or donating via PayPal to show your support. You can even buy me a coffee!

Lafayette, LA https://www.raymondcamden.com

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