There was this time when I need to build a program to check whether my web server is running fine. To determine that my web server is running fine, I wrote a Java applet that sends a HTTP GET to one of my web resources when the applet runs for the first time. And to keep the applet light, I look into Java in-built features for sending HTTP GETs to my server. This post documents a proof of concept that I did to communicate with my server endpoint via HTTP GET using Java in-built features.
There is a number dial that changes rapidly and a text field for the user to enter his name. When the user clicks on the "get lucky number" button, jQuery is used to send the lucky number on the number dial and the user name to the server.
The server generates a text file based on the input from the user and sends the file back to the browser. The browser will then show a download dialog box for the user to decide whether to save a copy of the file or view the file using one of the native applications found in his/her computer.