Blog of Dave

Since recently installling yet another distro on my laptop, I was unable to get the FTP functionality of my webcam software (Camorama) to work properly. The program will save snapshots locally, but bombs on transfer. Rather than troubleshoot it to death, I decided to whip out a quick and dirty ColdFusion directory watcher event gateway and have it watch for updated images, and then push them to my webserver via FTP.

For anyone interested in this non-earth shattering bit of code, here it is. First I created a config file:

WebcamWatcher.cfg

# The directory we want to watch. 
directory=/home/dshuck/Webcam_Pictures

# Do we want to recurse the directories?
recurse=no

# miliseconds between checks
interval=6000

# The comma separated list of extensions to match.
extensions=*

# component method for change events
changeFunction=onChange

# component method for add events
addFunction=onAdd

# no delete events for now
deleteFunction= 

Now to create the methods in our WebcamWatcher.cfc. In short, either a changed file or an added file will trigger the putImage function which first creates the FTP connection, changes directories to my webcam directory, then pushes the file to the server. Here is the code:

WebcamWatcher.cfc

<cfcomponent output="false">
	<cffunction name="onAdd" output="false">
		<cfargument name="CFEvent" type="struct" required="yes">
		<cfset var Data=CFEvent.data />
	  	<cflog file="DirectoryWatcher" application="No" 
	     	text=" ACTION: #data.type#;  FILE: #data.filename#;  calling putImage()" />
		<cfset putImage() />
	</cffunction>
	

	<cffunction name="onChange" output="false">
	  	<cfargument name="CFEvent" type="struct" required="yes">
	  	<cfset var data=CFEvent.data>
	  	<cflog file="DirectoryWatcher" application="No" 
	      text=" ACTION: #data.type#;  FILE: #data.filename#; TIME: #timeFormat(data.lastmodified)# calling putImage();" />
		<cfset putImage() />
	</cffunction>

	<cffunction name="putImage" access="private" output="false" returntype="void">
		<cfftp action = "open"
	   		username = "joeuser"
	  		connection = "MyConnection"
	   		password = "mycoolpassword"
	   		server = "www.mywebserver.com"
	   		stopOnError = "true" />
		
		<cfif cfftp.Succeeded>
			<cfftp 
				connection="MyConnection" 
				action="changedir" 
				directory="htdocs/mywebcamdirectory" />
			
			<cfif cfftp.Succeeded>
				<cfftp 
					connection = "MyConnection"
					action = "putFile" 
					name = "uploadFile" 
					transferMode = "binary" 
					localFile = "/home/dshuck/Webcam_Pictures/webcam.jpeg" 
					remoteFile = "DaveWebcam.jpg" />
			</cfif>
	
		</cfif>
		<cflog file="DirectoryWatcher" application="false" text="file push to webserver...#cfftp.Succeeded#" />
	</cffunction>
</cfcomponent>

So, now the internet can yet again be graced with my "almost live" presence. I can almost hear the selective sigh of relief.

I have to consider this to be a somewhat odd place for ColdFusion and it got me thinking... What kinds of odd places do you or have you used ColdFusion?

I don't know how pervasive this point of confusion is, but today a regular face in the ColdFusion community was making some remarks in this comment thread and further on his InstantSpot site that InstantSpot is not a ColdFusion-based application, with the insinuation that he won't support our efforts because of this.

Just to be clear, no matter whether or not you actually see ".cfm" in the URL, we are running InstantSpot on Adobe ColdFusion 8, using Mach-II 1.6, ColdSpring and other community tools. We are strong advocates for ColdFusion, work with our local ColdFusion User Group, try to be evangelists for it wherever we can, and we will continue to do so.

I have a new addiction playing with the style editor for my blog... I hate to call this a steampunk theme, simply for the inevitable flow of hardcore steampunk people coming here and telling me about how I don't know what steampunk is... so let's settle for pseudo steampunk shall we? 

Regardless, at my current rate I will change it again in a few days anyway! :)

I was also told this week that I look a lot different in my picture than I do in person.  I decided to add a headshot that says "Hey look... Dave was up all night coding again."  I think it is fairly true to life.