embed assets into binary

shard.lock

@@ -5,6 +5,10 @@ shards:
     git: https://github.com/sija/backtracer.cr.git
     version: 1.2.2
 
+  baked_file_system:
+    git: https://github.com/schovi/baked_file_system.git
+    version: 0.10.0
+
   crystal_mpd:
     git: https://github.com/mamantoha/crystal_mpd.git
     version: 0.15.1+git.commit.390d23b4d5535389c872fdc827a5a8c09f3f050a

shard.yml

@@ -10,6 +10,8 @@ dependencies:
   crystal_mpd:
     github: mamantoha/crystal_mpd
     branch: master
+  baked_file_system:
+    github: schovi/baked_file_system
 
 targets:
   crympd:

src/crympd.cr

@@ -2,6 +2,7 @@ require "json"
 require "kemal"
 require "crystal_mpd"
 require "./mpd_client"
+require "./filesystem"
 
 macro assets_version
   {{ `git rev-parse --short HEAD || echo -n "unknown"`.chomp.stringify }}
@@ -15,6 +16,12 @@ before_get ["/current_song", "/status", "/stats", "/playlist"] do |env|
   env.response.content_type = "application/json"
 end
 
+Filesystem.files.each do |file|
+  get(file.path) do |env|
+    Filesystem.serve(file, env)
+  end
+end
+
 get "/" do
   render "views/index.ecr"
 end
@@ -83,10 +90,11 @@ get "/albumart" do |env|
       send_file env, binary.to_slice, data["type"]
     end
   else
-    send_file env, "./public/images/record_placeholder.jpg", "image/jpeg"
+
+    send_file env, Filesystem.get("images/record_placeholder.jpg").gets_to_end.to_slice, "image/jpeg"
   end
 rescue
-  send_file env, "./public/images/record_placeholder.jpg", "image/jpeg"
+  send_file env, Filesystem.get("images/record_placeholder.jpg").gets_to_end.to_slice, "image/jpeg"
 end
 
 ws "/mpd" do |socket|

src/filesystem.cr

@@ -0,0 +1,21 @@
+require "baked_file_system"
+
+module Filesystem
+  BakedFileSystem.load("../public", __DIR__)
+
+  def self.serve(file, ctx)
+    req = ctx.request
+    resp = ctx.response
+    resp.status_code = 200
+    resp.content_type = MIME.from_filename(file.path)
+
+    if req.headers["Accept-Encoding"]? =~ /gzip/
+      resp.headers["Content-Encoding"] = "gzip"
+      resp.content_length = file.compressed_size
+      file.write_to_io(resp, compressed: true)
+    else
+      resp.content_length = file.size
+      file.write_to_io(resp, compressed: false)
+    end
+  end
+end