Store youtube thumb to local.

app/models/video_image.rb

@@ -1,5 +1,5 @@
 require 'uri'
-
+require 'fileutils'
 class VideoImage
   include Mongoid::Document
   include Mongoid::Timestamps
@@ -71,12 +71,18 @@ class VideoImage
         end
         if self.is_youtube
           begin
-            temp_file = Tempfile.new('0.jpg', encoding: 'ascii-8bit')
-            snapshot_content = Net::HTTP.get_response(URI.parse("http:"+self.get_snapshot_url)).body rescue nil
-            temp_file.write(snapshot_content)
-            temp_file.close
-            image = MiniMagick::Image.open(temp_file.path)
-            self.scale = (1.0 * image[:height] / image[:width] * 100).round(2)
+            youtube_img_url = "http:"+self.youtube_thumb
+            snapshot_content = Net::HTTP.get_response(URI.parse(youtube_img_url)).body rescue nil
+            if snapshot_content
+              self[:video_snapshot] = '0.jpg'
+              snapshot_file_path = self.video_snapshot.file.path
+              FileUtils.mkdir_p(File.dirname(snapshot_file_path))
+              File.open(snapshot_file_path, 'wb'){|f| f.write(snapshot_content)}
+              image = MiniMagick::Image.open(snapshot_file_path)
+              self.scale = (1.0 * image[:height] / image[:width] * 100).round(2)
+            else
+              puts "cannot read #{youtube_img_url}"
+            end
           rescue => e
             puts e.to_s
             self.scale = nil
@@ -231,7 +237,8 @@ class VideoImage
   end
 
   def get_snapshot_url
-    (self.is_youtube ? self.youtube_thumb : (self.video_snapshot.url))
+    self.video_snapshot.url rescue ""
+    # (self.is_youtube ? self.youtube_thumb : (self.video_snapshot.url))
   end
   protected