Is there an easy way to to send a simple GET request from a lock screen widget? I've built a garage door opener that can be triggered by a GET request (with the appropriate password, of course), and right now it's controlled by a webpage with javascript. It's possible to use this page from my phone to open the door, but it's quite a hassle to get to my browser before I can use it. What I'm after is a home screen or lock screen widget that will send off the request with the touch of a button, or an easy way to create one. I've attempted to write android apps before, and found it all very cumbersome.

I have a Nexus 5, running the latest cm-11 nightly build.
This could be achieved with tasker: You can create a "task" performing the HTTP_GET you need, and then create a shortcut to that task on your homescreen (the same way you'd create any other shortcut there: Tasker Task shows up in the list of available shortcuts, and lets you select the task to create the shortcut for).