From 8db0c2658650ad677c90a42a61061a75af8f762e Mon Sep 17 00:00:00 2001
From: Petter Rodhelind <petter.rodhelind@gmail.com>
Date: Mon, 22 Feb 2021 01:07:06 +0100
Subject: Add a semi-hidden feature of GET /.cache.

---
 main.go | 40 ++++++++++++++++++++++++----------------
 1 file changed, 24 insertions(+), 16 deletions(-)

diff --git a/main.go b/main.go
index 402ec8f..db1492e 100644
--- a/main.go
+++ b/main.go
@@ -102,39 +102,47 @@ func (p *post) String() string {
 type handler struct{}
 
 func (h handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
-	if r.URL.Path == "/favicon.ico" {
-		return
-	}
+	path := r.URL.Path[1:]
 
-	if r.URL.Path == "/" {
+	switch path {
+	case "":
 		http.Error(w, fmt.Sprintf("usage: %s/@facebookGroupName", r.Host), 400)
 		return
+	case "favicon.ico":
+		return
+	case ".cache":
+		var s string
+		for k, v := range cache.v {
+			s += v.Time.Format("2006-01-02 15:04:05")
+			s += "\t" + k + "\n"
+		}
+		fmt.Fprintf(w, "%s", s)
+		return
 	}
 
-	group := r.URL.Path[1:]
-	if group[0] == '@' {
-		group = group[1:]
+	if path[0] == '@' {
+		path = path[1:]
 	}
-	if strings.HasSuffix(group, ".rss") {
-		group = strings.TrimSuffix(group, ".rss")
+	if strings.HasSuffix(path, ".rss") {
+		path = strings.TrimSuffix(path, ".rss")
 		outputMode = "rss"
 	}
 
-	c, ok := cache.v[group]
+	c, ok := cache.v[path]
 	if !ok || time.Now().Sub(c.Time).Seconds() > cacheTimeout {
 		var err error
-		c, err = fetch(group)
+		c, err = fetch(path)
 		if err != nil {
 			http.Error(w, fmt.Sprintf("error: %s", err), 400)
 			return
 		}
 
 		if c == nil || len(c.Items) < 1 {
-			http.Error(w, fmt.Sprintf("%s", "Group not found."), 400)
+			http.Error(w, fmt.Sprintf("%s", "Page not found."), 400)
 			return
 		}
 
-		c.Name = group
+		c.Name = path
 		c.Time = time.Now()
 
 		cache.Lock()
@@ -145,12 +153,12 @@ func (h handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	fmt.Fprintf(w, "%s\n", c.String())
 }
 
-func fetch(group string) (c *channel, err error) {
-	if group == "" {
+func fetch(path string) (c *channel, err error) {
+	if path == "" {
 		return
 	}
 
-	url := "https://www.facebook.com/pg/" + group + "/posts/"
+	url := "https://www.facebook.com/pg/" + path + "/posts/"
 
 	log.Println("Fetching:", url)
 
-- 
cgit v1.2.3