Initial commit

src/visor.cr

@@ -0,0 +1,69 @@
+require "kemal"
+require "xml"
+require "http/client"
+require "base64"
+
+macro templated(filename)
+  render "views/#{{{filename}}}.ecr", "views/layout.ecr"
+end
+
+context = OpenSSL::SSL::Context::Client.insecure
+client = HTTP::Client.new("www.youtube.com", 443, context)
+
+def params_to_hash(params)
+  pairs = params.split("&")
+  hash = Hash(String, String).new
+  pairs.each do |pair|
+    key, value = pair.split("=")
+    hash[key] = URI.unescape(value)
+  end
+  return hash
+end
+
+get "/" do |env|
+  templated "index"
+end
+
+get "/watch/:video_id" do |env|
+  video_id = env.params.url["video_id"]
+
+  if File.exists?("video_info/#{video_id}")
+    video_info = JSON.parse(File.open("video_info/#{video_id}"))
+  else
+    video_info_encoded = HTTP::Client.get("https://www.youtube.com/get_video_info?video_id=#{video_id}&el=info&ps=default&eurl=&gl=US&hl=en", nil, nil, tls = context).body
+    video_info = params_to_hash(video_info_encoded)
+
+    File.write("video_info/#{video_id}", video_info.to_json)
+  end
+
+  fmt_stream_map = video_info["url_encoded_fmt_stream_map"].to_s.split(",")
+  fmt_stream = Array(Hash(String, String)).new
+  fmt_stream_map.each do |fmt|
+    fmt_stream << params_to_hash(fmt.to_s)
+  end
+  fmt_stream.reverse!
+  templated "watch"
+end
+
+get "/listen/:video_id" do |env|
+  video_id = env.params.url["video_id"]
+
+  if File.exists?("video_info/#{video_id}")
+    video_info = JSON.parse(File.open("video_info/#{video_id}"))
+  else
+    video_info_encoded = HTTP::Client.get("https://www.youtube.com/get_video_info?video_id=#{video_id}&el=info&ps=default&eurl=&gl=US&hl=en", nil, nil, tls = context).body
+    video_info = params_to_hash(video_info_encoded)
+
+    File.write("video_info/#{video_id}", video_info.to_json)
+  end
+
+  adaptive_fmt = Array(Hash(String, String)).new
+  video_info["adaptive_fmts"].to_s.split(",") do |fmt|
+    adaptive_fmt << params_to_hash(video_info["adaptive_fmts"].to_s)
+  end
+  templated "listen"
+end
+
+public_folder "assets"
+
+Kemal.run