[TF2 (and others)] VGUI URL Cache Buster

[MYGO.pl]

Description:
At some point, the behavior of Steam's webview changed. Calling ShowMOTDPanel (or variants) will show a previously viewed page if the last page viewed was on the same first-level domain.

This plugin hooks the VGUIMenu usermessage and manipulates it in one of two ways to attempt to force displaying the correct page:

• The "proxy" iframe: The URL is rewritten so the user navigates to a static page with an iframe element; the desired page is loaded into it.
• The "delayed load": Another URL is opened, then the original URL is sent after a short delay.

This plugin is tested and verified to work in Team Fortress 2. Other Source games that use bitbuffers should also work. CS:GO uses protobufs for user messages, so this plugin does not work there.

ConVars:

• vgui_workaround_delay_time: Amount of time that the "delayed load" takes.
• vgui_workaround_proxy_page: The URL to the static iframe page. You can host a copy yourself; it's available in the repository.

Other configuration:
You can configure which URL prefixes use which method. See the configs/vgui_cache_buster_urls.cfg file for more details.

Dependencies:
If the "proxy" method is used, this plugin is dependent on one static page made accessible via web hosting. The plugin ships with a default URL pointed to my personally hosted copy of the page.

No other plugin / extension dependencies.

Things the plugin will clobber:
VGUIMenu usermessages, obviously.

Pages that are specific with X-Frame-Options headers will refuse to load with the "proxy" method. This includes YouTube, Google, and Steam group pages.

Installation:

1. Download the package.zip file from the releases page and copy the files into your SourceMod directory.
   • Optionally: Upload the www/motd_proxy.html page to web hosting.
2. Load the plugin. This will generate the configuration file located at cfg/sourcemod/plugin.vgui_cache_buster.cfg.
3. Perform any desired configuration changes in the above file, as well as the URL configuration file. If you're hosting the static page yourself, change the vgui_workaround_proxy_page ConVar.

Releases / Source Code

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