lyrics: refactor the get_lyrics function to avoid repetition and make…

…s it clearer

sonata/lyricwiki.py

@@ -1,6 +1,7 @@
 import os
 import urllib
 import re
+import sys
 import threading # get_lyrics_start starts a thread get_lyrics_thread
 
 import gobject
@@ -37,34 +38,36 @@ def lyricwiki_editlink(self, songinfo):
             (artist, title))
 
     def get_lyrics_thread(self, callback, artist, title):
+
+        re_textarea = re.compile(r'<textarea[^>]*>')
+        NO_LYRICS = '&lt;!-- PUT LYRICS HERE (and delete this entire line) --&gt;'
+
+        def get_content(page):
+            content = page.read()
+            content = re_textarea.split(content)[1].split("</textarea>")[0]
+            return content.strip()
+
         try:
-            lyricpage = urllib.urlopen(('http://lyrics.wikia.com/index.php?'
-                                        'title=%s:%s&action=edit') \
-                                       % (self.lyricwiki_format(artist),
-                                          self.lyricwiki_format(title))).read()
-            content = re.split("<textarea[^>]*>",
-                               lyricpage)[1].split("</textarea>")[0]
-            content = content.strip()
-            redir_tag = "#redirect"
-            if content[:len(redir_tag)].lower() == redir_tag:
+            addr = 'http://lyrics.wikia.com/index.php?title=%s:%s&action=edit' \
+                    % (self.lyricwiki_format(artist), self.lyricwiki_format(title))
+            content = get_content(urllib.urlopen(addr))
+
+            if content.lower().startswith("#redirect"):
                 addr = "http://lyrics.wikia.com/index.php?title=%s&action=edit" \
                         % urllib.quote(content.split("[[")[1].split("]]")[0])
-                lyricpage = urllib.urlopen(addr).read()
-                content = re.split("<textarea[^>]*>",
-                                   lyricpage)[1].split("</textarea>")[0]
-                content = content.strip()
-            lyrics = content.split(
-                "&lt;lyrics&gt;")[1].split("&lt;/lyrics&gt;")[0].strip()
-            if lyrics != ('&lt;!-- PUT LYRICS HERE '
-                                  '(and delete this entire line) --&gt;'):
+                content = get_content(urllib.urlopen(addr))
+
+            lyrics = content.split("&lt;lyrics&gt;")[1].split("&lt;/lyrics&gt;")[0].strip()
+            if lyrics != NO_LYRICS:
                 lyrics = misc.unescape_html(lyrics)
                 lyrics = misc.wiki_to_html(lyrics)
                 lyrics = lyrics.decode("utf-8")
                 self.call_back(callback, lyrics=lyrics)
             else:
                 error = _("Lyrics not found")
                 self.call_back(callback, error=error)
-        except:
+        except Exception, e:
+            print >> sys.stderr, "Error while fetching the lyrics:\n%s" % e
             error = _("Fetching lyrics failed")
             self.call_back(callback, error=error)