From 1f6937f22c376b127ba87a77ce653c2f396742dd Mon Sep 17 00:00:00 2001
From: Pierre-Olivier Mercier <nemunaire@nemunai.re>
Date: Thu, 2 Jul 2026 23:58:22 +0800
Subject: [PATCH] stream: let the listener download the current track
 (/download)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
---
 stream/index.html |  1 +
 stream/radio.liq  | 31 +++++++++++++++++++++++++++++++
 2 files changed, 32 insertions(+)

diff --git a/stream/index.html b/stream/index.html
index bbba469..eb10981 100644
--- a/stream/index.html
+++ b/stream/index.html
@@ -78,6 +78,7 @@
     <audio id="player" controls autoplay preload="none"></audio>
     <div class="actions">
       <button id="skipBtn" type="button">⏭ Suivant</button>
+      <a id="dlBtn" href="/download" download>⬇ Télécharger</a>
     </div>
     <div class="share">
       <input id="streamUrl" type="text" readonly>
diff --git a/stream/radio.liq b/stream/radio.liq
index 4913280..3e58526 100644
--- a/stream/radio.liq
+++ b/stream/radio.liq
@@ -143,3 +143,34 @@ harbor.http.register(
     resp.json({skipped=true})
   end
 )
+
+# Télécharger le fichier du morceau en cours. Le chemin vient de la métadonnée
+# `filename` de la source diffusée : c'est bien le fichier à l'antenne, et il est
+# forcément encore sur le disque tant qu'il joue (pas encore évincé par le LRU).
+def content_type_of(name) =
+  low = string.case(lower=true, name)
+  if string.contains(suffix=".flac", low) then "audio/flac"
+  elsif string.contains(suffix=".ogg", low) then "audio/ogg"
+  elsif string.contains(suffix=".opus", low) then "audio/opus"
+  elsif string.contains(suffix=".m4a", low) or string.contains(suffix=".aac", low) then "audio/mp4"
+  elsif string.contains(suffix=".wav", low) then "audio/wav"
+  else "audio/mpeg"
+  end
+end
+
+harbor.http.register(
+  port=8000, method="GET", "/download",
+  fun(_, resp) -> begin
+    m = now_playing()
+    fname = m["filename"]
+    if fname == "" or not file.exists(fname) then
+      resp.status_code(404)
+      resp.data("no track currently available")
+    else
+      base = path.basename(fname)
+      resp.content_type(content_type_of(base))
+      resp.header("Content-Disposition", "attachment; filename=\"#{base}\"")
+      resp.data(file.contents(fname))
+    end
+  end
+)