refresh Steam session when expired

Author: drweissbrot

CHANGELOG.md

@@ -6,6 +6,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 This project does not adhere to Semantic Versioning.
 
 ## [Unreleased]
+### Added
+* Steam sessions will now be refreshed if required
+
 ### Docs
 * Add readme
 

README.md

@@ -14,6 +14,8 @@ The extension loads an [offscreen Leetify page in the background](src/offscreen/
 
 Then [it requests the GCPD pages](src/gcpd.ts) for Scrimmage (which includes CS2LT matches) and [extracts matches from the response](src/offscreen/dom-parser.ts), one after another, until it doesn't find any more matches that still have a demo download link. It [sends the demo download links and the timestamps of each match to Leetify](src/leetify-match-uploader.ts) (via the access token from before), which saves all new matches as manual uploads. They'll show up on the [Data Sources](https://leetify.com/app/data-sources) page and will be queued; after a bit of waiting (usually no more than a few minutes), they'll also show up in your [Match History](https://leetify.com/app/matches) on Leetify (but not on the Dashboard or Profile).
 
+If your Steam session has expired and the extension can't actually load the GCPD page, it'll try to refresh your session.
+
 After Scrimmage, the extension will again request GCPD pages for Wingman, filter out ranked or unranked matches ([if configured to do so](src/view/options.ts)), and send the found matches to Leetify.
 
 You can independently enable or disable: the sync every 15 minutes, the sync on Leetify visits, and on GCPD visits.

manifest.json

@@ -57,6 +57,7 @@
 
 	"host_permissions": [
 		"https://leetify.com/*",
-		"https://steamcommunity.com/my/gcpd/730"
+		"https://steamcommunity.com/my/gcpd/730",
+		"https://login.steampowered.com/jwt/refresh"
 	]
 }

src/gcpd.ts

@@ -37,7 +37,19 @@ class Gcpd {
 		url.searchParams.set('tab', tab);
 		if (continueToken) url.searchParams.set('continue_token', continueToken);
 
-		const res = await fetch(url);
+		let res = await fetch(url);
+
+		// Steam sessions expire after about a day and need to be refreshed.
+		// We can do that by simply hitting the refresh endpoint, and asking it
+		// to redirect us back to our original target. If this fails, we'll
+		// error out and tell the user to log in to Steam.
+		if (res.url.startsWith('https://steamcommunity.com/login/home')) {
+			const refreshJwtUrl = new URL('https://login.steampowered.com/jwt/refresh');
+			refreshJwtUrl.searchParams.set('redir', url.toString());
+
+			res = await fetch(refreshJwtUrl);
+		}
+
 		if (!/^https:\/\/steamcommunity\.com\/(id\/[^/]+|profiles\/\d+)\/gcpd\/730/.test(res.url)) return GcpdError.STEAM_AUTH_FAILED;
 
 		const json = await res.json();