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Issue 18.2 ('Listbox Drawing')
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More Fun with Comics

Upgrading Comic Downloader to Work with URLConnection and HTTP 1.1

Issue: 18.2 (March/April 2020)
Author: Marc Zeedar
Author Bio: Marc taught himself programming in high school when he bought his first computer but had no money for software. He's had fun learning ever since.
Article Description: No description available.
Article Length (in bytes): 17,262
Starting Page Number: 12
Article Number: 18202
Resource File(s):

Download Icon project18202.zip Updated: 2020-03-02 10:36:09

Related Link(s): None

Excerpt of article text...

I really hate it when code I've been using for years suddenly stops working. Usually this happens because of updates—either to Xojo or my operating system—so I'm careful about changing either of those. But when you're working with the Internet, specially HTTP, it can happen just because the Internet itself was changed.

Eight years ago (in xDev 10.1) I published an article about my Comic Downloader project ("Fun With Comics"). This is a complex program I wrote that runs each morning. It parses the web pages of several comic sites, extracts the day's comic, and downloads the graphic into a folder on my Dropbox so I can view all my comics at once, with no ads or distractions.

To make this app more robust, I used XojoScripts for the parsing, so I could easily make changes to the program without having to recompile it. In theory, that made the app unlikely to fail since new versions of Xojo wouldn't cause any backward compatibility issues.

This worked great for years. Other than having to tweak some of the scripts occasionally when a site would change their HTML and break my parsing, the app just ran and worked.

Until it didn't.

HTTP 1.1

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