lib/scissor/chunk.rb in scissor-0.1.2 vs lib/scissor/chunk.rb in scissor-0.2.0

@@ -1,5 +1,8 @@
+require 'open-uri'
+require 'tempfile'
+
 module Scissor
   class Chunk
     class Error < StandardError; end
     class EmptyFragment < Error; end
     class OutOfDuration < Error; end
@@ -13,9 +16,38 @@
         @fragments << Fragment.new(
           filename,
           0,
           SoundFile.new(filename).length)
       end
+    end
+
+    def self.new_from_url(url)
+      file = nil
+      content_types = {
+        'audio/wav' => 'wav',
+        'audio/x-wav' => 'wav',
+        'audio/wave' => 'wav',
+        'audio/x-pn-wav' => 'wav',
+        'audio/mpeg' => 'mp3',
+        'audio/x-mpeg' => 'mp3',
+        'audio/mp3' => 'mp3',
+        'audio/x-mp3' => 'mp3',
+        'audio/mpeg3' => 'mp3',
+        'audio/x-mpeg3' => 'mp3',
+        'audio/mpg' => 'mp3',
+        'audio/x-mpg' => 'mp3',
+        'audio/x-mpegaudio' => 'mp3',
+      }
+
+      open(url) do |f|
+        ext = content_types[f.content_type.downcase]
+
+        file = Tempfile.new(['audio', '.' + ext])
+        file.write(f.read)
+        file.flush
+      end
+
+      new(file.path)
     end
 
     def add_fragment(fragment)
       @fragments << fragment
     end