From e9b138be62fc312d4ef542938e12198282236c4b Mon Sep 17 00:00:00 2001
From: Simon Rieger <simon@rieger.app>
Date: Thu, 24 Oct 2024 12:54:47 +0200
Subject: [PATCH] add logging

---
 go/main.go | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/go/main.go b/go/main.go
index 1c1ce55..0c4c24c 100644
--- a/go/main.go
+++ b/go/main.go
@@ -1,7 +1,7 @@
 package main
 
 import (
-    "fmt"
+    "log"
     "net/http"
     "time"
 
@@ -13,18 +13,24 @@ func convertICStoRSS(w http.ResponseWriter, r *http.Request) {
     // Lese die ICS-URL aus dem Query-Parameter
     icsURL := r.URL.Query().Get("ics")
     if icsURL == "" {
+        log.Println("[ERROR] Missing 'ics' query parameter")
         http.Error(w, "Missing 'ics' query parameter", http.StatusBadRequest)
         return
     }
 
+    log.Printf("[INFO] Fetching ICS file from URL: %s\n", icsURL)
+
     // ICS-Datei herunterladen
     resp, err := http.Get(icsURL)
     if err != nil {
+        log.Printf("[ERROR] Unable to fetch ICS file: %v\n", err)
         http.Error(w, "Unable to fetch ICS file", http.StatusInternalServerError)
         return
     }
     defer resp.Body.Close()
 
+    log.Println("[INFO] Parsing ICS file")
+
     // ICS-Datei parsen
     parser := gocal.NewParser(resp.Body)
     parser.Parse()
@@ -48,19 +54,27 @@ func convertICStoRSS(w http.ResponseWriter, r *http.Request) {
         feed.Items = append(feed.Items, item)
     }
 
+    log.Println("[INFO] Generating RSS feed")
+
     // RSS als HTTP-Antwort senden
     rssData, err := feed.ToRss()
     if err != nil {
+        log.Printf("[ERROR] Unable to generate RSS feed: %v\n", err)
         http.Error(w, "Unable to generate RSS feed", http.StatusInternalServerError)
         return
     }
 
     w.Header().Set("Content-Type", "application/rss+xml")
     w.Write([]byte(rssData))
+
+    log.Println("[INFO] RSS feed successfully generated and sent")
 }
 
 func main() {
     http.HandleFunc("/rss", convertICStoRSS)
-    fmt.Println("Server is running at :8080")
-    http.ListenAndServe(":8080", nil)
+    log.Println("[INFO] Server is running at :8080")
+    
+    if err := http.ListenAndServe(":8080", nil); err != nil {
+        log.Fatalf("[FATAL] Server failed to start: %v\n", err)
+    }
 }