fix: clear cached content when feed URL changes

Also prepare release 0.3.8

Author: codemicro

CHANGELOG.md

@@ -6,6 +6,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ## Unreleased
 
+## 0.3.8 - 2025-01-18
+### Fixed
+* Cached feed content and corresponding etags/last modified headers are now cleared when the URL of a feed entry is updated
+
 ## 0.3.7 - 2023-04-08
 ### Fixed
 * Remove potential race condition caused by using `RLock` instead of `Lock`

walrss/internal/db/db.go

@@ -62,6 +62,12 @@ func (f *Feed) CacheWithLastModified(lastModified, content string) {
 	f.CachedContent = content
 }
 
+func (f *Feed) ClearCache() {
+	f.LastEtag = ""
+	f.LastModified = ""
+	f.CachedContent = ""
+}
+
 type FeedSlice []*Feed
 
 func (f FeedSlice) Len() int {

walrss/internal/http/edit.go

@@ -107,6 +107,10 @@ func (s *Server) editFeedItem(ctx *fiber.Ctx) error {
 		feed.Name = ctx.FormValue("name")
 		feed.URL = ctx.FormValue("url")
 
+		if urlChanged := feed.URL != ctx.FormValue("old-url"); urlChanged {
+			feed.ClearCache()
+		}
+
 		if err := core.UpdateFeed(s.state, feed); err != nil {
 			return err
 		}

walrss/internal/http/views/main.qtpl.html

@@ -186,7 +186,7 @@ <h1>My settings</h1>
             name="url"
             id="feed-{%s= id %}-url"
             value="{%j url %}"
-    ></td>
+    ><input type="hidden" name="old-url" value="{%j url %}"></td>
     <td>
         <div class="btn-group btn-group-sm" role="group" aria-label="Basic example">
             <button