Fix: Add dynamic stream URL detection for multi-environment support

- Add get-stream-base-url() function that detects host from HTTP request
- Replace hardcoded *stream-base-url* with dynamic function calls in all templates
- Supports localhost, Tailscale, and VPS deployments automatically
- Fixes JavaScript error 'streamBaseUrl is null' on remote access
- Maintains backward compatibility with ASTEROID_STREAM_URL env var

asteroid.lisp

@@ -21,6 +21,17 @@
 (defparameter *supported-formats* '("mp3" "flac" "ogg" "wav"))
 (defparameter *stream-base-url* "http://localhost:8000")
 
+(defun get-stream-base-url ()
+  "Get the stream base URL, using the request host if available"
+  (if (boundp 'radiance:*request*)
+      (let* ((host (or (header "Host") "localhost:8080"))
+             ;; Remove port if present and add :8000
+             (host-without-port (if (position #\: host)
+                                    (subseq host 0 (position #\: host))
+                                    host)))
+        (format nil "http://~a:8000" host-without-port))
+      *stream-base-url*))
+
 ;; Configure JSON as the default API format
 (define-api-format json (data)
   "JSON API format for Radiance"
@@ -528,8 +539,8 @@
      :status-message "🟢 LIVE - Broadcasting asteroid music for hackers"
      :listeners "0"
      :stream-quality "128kbps MP3"
-     :stream-base-url *stream-base-url*
-     :default-stream-url (concatenate 'string *stream-base-url* "/asteroid.aac")
+     :stream-base-url (get-stream-base-url)
+     :default-stream-url (concatenate 'string (get-stream-base-url) "/asteroid.aac")
      :default-stream-encoding "audio/aac"
      :default-stream-encoding-desc "AAC 96kbps Stereo"
      :now-playing-artist "The Void"
@@ -558,7 +569,7 @@
      :status-message "🟢 LIVE - Broadcasting asteroid music for hackers"
      :listeners "0"
      :stream-quality "128kbps MP3"
-     :stream-base-url *stream-base-url*
+     :stream-base-url (get-stream-base-url)
      :now-playing-artist "The Void"
      :now-playing-track "Silence"
      :now-playing-album "Startup Sounds"
@@ -571,8 +582,8 @@
                                        (asdf:system-source-directory :asteroid))))
     (clip:process-to-string 
      (plump:parse (alexandria:read-file-into-string template-path))
-     :stream-base-url *stream-base-url*
-     :default-stream-url (concatenate 'string *stream-base-url* "/asteroid.aac")
+     :stream-base-url (get-stream-base-url)
+     :default-stream-url (concatenate 'string (get-stream-base-url) "/asteroid.aac")
      :default-stream-encoding "audio/aac")))
 
 ;; Configure static file serving for other files
@@ -622,8 +633,8 @@
      :icecast-status (check-icecast-status)
      :track-count (format nil "~d" track-count)
      :library-path "/home/glenn/Projects/Code/asteroid/music/library/"
-     :stream-base-url *stream-base-url*
-     :default-stream-url (concatenate 'string *stream-base-url* "/asteroid.aac"))))
+     :stream-base-url (get-stream-base-url)
+     :default-stream-url (concatenate 'string (get-stream-base-url) "/asteroid.aac"))))
 
 ;; User Management page (requires authentication)
 (define-page users-management #@"/admin/user" ()
@@ -867,8 +878,8 @@
     (clip:process-to-string 
      (plump:parse (alexandria:read-file-into-string template-path))
      :title "Asteroid Radio - Web Player"
-     :stream-base-url *stream-base-url*
-     :default-stream-url (concatenate 'string *stream-base-url* "/asteroid.aac")
+     :stream-base-url (get-stream-base-url)
+     :default-stream-url (concatenate 'string (get-stream-base-url) "/asteroid.aac")
      :bitrate "128kbps MP3"
      :now-playing-artist "The Void"
      :now-playing-track "Silence"
@@ -883,8 +894,8 @@
     (clip:process-to-string 
      (plump:parse (alexandria:read-file-into-string template-path))
      :title "Asteroid Radio - Web Player"
-     :stream-base-url *stream-base-url*
-     :default-stream-url (concatenate 'string *stream-base-url* "/asteroid.aac")
+     :stream-base-url (get-stream-base-url)
+     :default-stream-url (concatenate 'string (get-stream-base-url) "/asteroid.aac")
      :default-stream-encoding "audio/aac")))
 
 (define-page popout-player #@"/popout-player" ()
@@ -893,8 +904,8 @@
                                        (asdf:system-source-directory :asteroid))))
     (clip:process-to-string 
      (plump:parse (alexandria:read-file-into-string template-path))
-     :stream-base-url *stream-base-url*
-     :default-stream-url (concatenate 'string *stream-base-url* "/asteroid.aac")
+     :stream-base-url (get-stream-base-url)
+     :default-stream-url (concatenate 'string (get-stream-base-url) "/asteroid.aac")
      :default-stream-encoding "audio/aac")))
 
 (define-api asteroid/status () ()