Added configurable downloaders.

[dead/whatever-dl.git] / bin / whatever-dl

diff --git a/bin/whatever-dl b/bin/whatever-dl
index cde9e4dbbaaac2e3eb25790a2767d1c4d59d3c2c..fbc84e909bde09dbfc14f525404300c56e00394a 100755 (executable)
--- a/bin/whatever-dl
+++ b/bin/whatever-dl
@@ -1,4 +1,4 @@
-#!/usr/bin/ruby -w
+#!/usr/bin/ruby -wKU
 #
 # whatever-dl, a script to download online (web-based) videos.
 #
@@ -19,14 +19,32 @@
 # http://www.fsf.org/licensing/licenses/gpl.html
 #
 
-# We require the UriUtilities class to handle
-# the download of the video URL.
-require 'src/uri_utilities'
+# We need Pathname to get the real filesystem path
+# of this script (and not, for example, the path of
+# a symlink which points to it.
+require 'pathname'
 
+# This bit of magic adds the parent directory (the
+# project root) to the list of ruby load paths.
+# Thus, our require statements will work regardless of
+# how or from where the script was run.
+executable = Pathname.new(__FILE__).realpath.to_s
+$: << File.dirname(executable) + '/../'
+
+# Load our config file.
+require 'bin/configuration'
+
+# And the downloaders...
+require 'src/downloader'
+
+# The Dir.glob that's coming up doesn't use the
+# Ruby library path so we need to tell it where to
+# look explicitly.
+websites_pattern = File.dirname(executable) + '/../src/websites/*.rb'
 
 # All of the website classes are located in one
 # directory, so we can 'require' them automatically.
-Dir.glob('src/websites/*.rb').each do |r|
+Dir.glob(websites_pattern).each do |r|
   require r
 end
 
@@ -51,67 +69,48 @@ if (__FILE__ == $0) then
     Kernel.exit(EXIT_NO_URL)
   end
 
-  # Check the URL against each website's class.
-  # The class will know whether or not the URL
-  # "belongs" to its website.
-
-  site = nil
-  
-  Website.subclasses.each do |w|
-    if w.owns_url?(ARGV[0])
-      site = w.new()
-      break
-    end
-  end
+  # Factory method.
+  site = Website.create(ARGV[0])
 
   if site.nil?
     puts 'Invalid URL.'
     exit(EXIT_INVALID_URL)
   end
   
-  video_url = site.get_video_url(ARGV[0])
+  video_url = site.get_video_url()
 
   if video_url.nil?
     puts 'Error retrieving video URL.'
     exit(EXIT_COULDNT_GET_VIDEO_URL)
   end
-
-  video_uri = URI.parse(video_url)
-  uu = UriUtilities.new()
-  
-
-  # Here, we start out with a default file name and
-  # extension. If UriUtilities can parse a sane filename
-  # out of the URL, we'll use that. Otherwise, we fall
-  # back to the default.
-  outfile_name = 'default.ext'
-  
-  if not uu.get_filename(video_uri).nil?
-    outfile_name = uu.get_filename(video_uri)
-  else
-    puts "We couldn't determine the video's filename. Falling back to the default, #{outfile_name}."
-  end
-
-  
-  if File.exists?(outfile_name)
-    puts "Error: output file already exists. Please remove #{outfile_name}, and try again."
+    
+  if File.exists?(site.get_video_filename())
+    puts "Error: output file already exists. Please remove #{site.get_video_filename()}, and try again."
     Kernel.exit(EXIT_OUTPUT_FILE_ALREADY_EXISTS)
   end
 
-
+  # The Downloader class is a factory; it should decide
+  # which subclass we get.
+  downloader = Downloader.create(Configuration::DOWNLOAD_METHOD)
+  
   # Attempt to download the file, and rescue and report
-  # any (predictable) exceptions.
+  # any (predictable) exceptions. The wget downloader will
+  # naturally not report any of these, since it will die in
+  # its own process.
   begin
-    uu.download_with_progress_bar(video_uri, outfile_name)
+    downloader.download(video_url, site.get_video_filename())
   rescue Errno::ECONNREFUSED => e
     puts 'The connection to the server (to download the video file) was refused. Check your connection, and try again later.'
     Kernel.exit(EXIT_CONNECTION_REFUSED)
-  rescue Errno:EACCES => e
+  rescue Errno::EACCES => e
     puts "Access denied. Check that you have write permission to the output file/directory. Details: #{e.message}."
   rescue OpenURI::HTTPError => e
     puts "An HTTP error occurred while downloading the video file: #{e.message}."
     Kernel.exit(EXIT_HTTP_ERROR)
   end
 
+  # Write an empty line at the end for aesthetic reasons.
+  puts ''
+  
   Kernel.exit(EXIT_SUCCESS)
 end