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Using The Coldfusion XMLValidate Function To Validate User Content

Sometimes you want to allow a limited set of HTML tags in user generated content.  This can be done with the XMLValidate function in Coldfusion as long as the content is valid XHTML.

Several years ago I read an article about escaping form values posted by Ben Nadel on his site www.bennadel.com. Some discussion came up in the comments about allowing a limited set of html tags for paragraphs, bold text, and so on.  I had a need to do this for forum comments on a site that I was working on. This site was written in Coldfusion so I was looking at some of the same options mentioned in Ben's article. I ended up doing something a little different though.

We were using TinyMCE for the forum comments. TinyMCE produces XHTML code so I was able to use Coldfusion's abilities to handle XML to accomplish this task. Using the XMLValidate function and an XML schema that was modified to accept a small list of tags and attributes the comments were correctly limited. Here is the relevant po…
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Setting Up an Angular 5 site on Github Pages

Getting Started

This article will go over all the steps to setup an Angular site on GitHub pages.  The site will use Angular's AOT compiling and be served from the docs folder of the repository.

To start with you can follow the guide here to setup a new Angular project. Then you will need to setup a repository on Github.com.  The name of the repository doesn't matter, this site will use the docs folder, not the specially named repository with USERNAME.github.io as the name.



Project Changes

After that open up the project in your editor and open the .angular.cli.json file.  Change the "outDir" to "docs".  This is where the files will be created when you build the project.  The contents of .angular.cli.json are shown below with all the changes discussed in the article.

Custom Domain

To use a custom domain for your site you need to create a file name CNAME that contains only the domain name.  The GitHub help page explains how to setup DNS and everything else you …

Listening For JS Error Events

I was recently reading a blog article, Ben Nadel JS Error.   In the article Ben showed how to setup an error event handler that would be triggered for any failed image loads on a page.  This was done by attaching an error event handler to the body element.  Also he had to pass the last argument to addEventListener as true so that it would trigger in the capture phase of the event. This event handler will run whenever an external resource like an image or a style sheet fails to load on the page.
After some experimenting I found that if I attach the event to the window object it is triggered for all the failed resources and also for any javascript errors that happen on the page.  Setting this up on a site with quite a bit of traffic from different browsers was very interesting.  It was a bit overwhelming at first until some things were fixed and some checking was added to filter out some of the errors.  In the event handler the event and error information is being posted back to a serv…

My First Memories of Coding

The first time I remember writing code was in grade school in the computer lab.  We were learning Basic.  I'm not sure how old I was, but it would have been sometime in the late '80s or early '90s.  I remember they had us write a program that would take some numbers from the user and print out the average.  I had to ask how to do division. I had only seen it with the standard division symbol in math class, not the forward slash.  Soon after that I was able to get Basic on my home PC.  Actually I think it was included in MS-DOS.

At school and in the beginning at home I was using Basic where you had to use line numbers to write your code.  Then to edit a line you had to retype that line with the number.  Soon after that I was able to get QBasic and a book to help me get started.


Using IR codes from Broadlink backup file

This is a continuation of yesterdays post about the Broadlink RM2 wifi remote.  I was able to test out using the codes to control my remote today.  They are stored in JSON format in the broadlink backup file.  The backup file is a zip file.  After you extract it there is a folder named SharedData.  There are several files in the folder.  The one that seems to have all the codes is named jsonIrCode.  The data looks like an array of objects, each with a code and some other information.


Python control of Broadlink RM2 wifi remote

I recently got a Broadlink wifi remote.  I have been playing around trying to send commands to it with python.  I found code on github that does most of what I need.  It looks like the device itself doesn't learn any remote codes.  It is all in the app.  The code I found can send codes to the device and get codes from learning mode. I have a bunch of buttons programmed in the app already.  I wanted to see if I could get those codes.  I think I got them today.  The app, called eControls, allows you to backup your setup.  Today I was able to get my backup file from their backup site. Tomorrow I will try to use the codes from the backup.

Getting Hidden App Data From Your Google Drive

Some Android applications use space on your Google Drive to store data.  You can't see this data by browsing drive the normal way.  You can get access to it if you get the access token from the app and do a few other things.

I use an app to keep some notes and other things.  They require getting the paid version of the app to backup your data.  I wanted to see if I could get it myself without paying for the app.  I found out how to do this from this Stackoverflow post http://stackoverflow.com/questions/22832104/see-hidden-app-data-in-google-drive.  The example there uses php. Since I have been learning Python recently, I decided to see if I could do the same thing with Python.

 There is a pretty good explanation of why you need to go through all the steps you need to go through to get your data in the accepted answer for that post, so I won't go into too much detail about that here.