[feature] Add opt-in RSS feed for account's latest Public posts (#897)

* start adding rss functionality

* add gorilla/feeds dependency

* first bash at building rss feed
still needs work, this is an interim commit

* tidy up a bit

* add publicOnly option to GetAccountLastPosted

* implement rss endpoint

* fix test

* add initial user docs for rss

* update rss logo

* docs update

* add rssFeed to frontend

* feed -> feed.rss

* enableRSS

* increase rss logo size a lil bit

* add rss toggle

* move emojify to text package

* fiddle with rss feed formatting

* add Text field to test statuses

* move status to rss item to typeconverter

* update bun schema for enablerss

* simplify 304 checking

* assume account not rss

* update tests

* update swagger docs

* allow more characters in title, trim nicer

* update last posted to be more consistent

1 files changed, 4 insertions, 2 deletions

diff --git a/internal/web/customcss.go b/internal/web/customcss.go
index 34e15844c..48f8c0f71 100644
--- a/internal/web/customcss.go
+++ b/internal/web/customcss.go
@@ -29,6 +29,8 @@ import (
 	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
 )
 
+const textCSSUTF8 = string(api.TextCSS + "; charset=utf-8")
+
 func (m *Module) customCSSGETHandler(c *gin.Context) {
 	if !config.GetAccountsAllowCustomCSS() {
 		err := errors.New("accounts-allow-custom-css is not enabled on this instance")
@@ -55,6 +57,6 @@ func (m *Module) customCSSGETHandler(c *gin.Context) {
 		return
 	}
 
-	c.Header("Cache-Control", "no-cache")
-	c.Data(http.StatusOK, "text/css; charset=utf-8", []byte(customCSS))
+	c.Header(cacheControlHeader, cacheControlNoCache)
+	c.Data(http.StatusOK, textCSSUTF8, []byte(customCSS))
 }