added safe unicode funtion, and implemented it in whoosh indexer

pylons_app/lib/helpers.py

@@ -336,3 +336,19 b' def gravatar_url(email_address, size=30)'
     gravatar_url += urllib.urlencode({'d':default, 's':str(size)})
 
     return gravatar_url
+
+def safe_unicode(str):
+    """safe unicode function. In case of UnicodeDecode error we try to return
+    unicode with errors replace, if this failes we return unicode with 
+    string_escape decoding """
+    
+    try:
+        u_str = unicode(str)
+    except UnicodeDecodeError:
+        try:
+            u_str = unicode(str, 'utf-8', 'replace')
+        except UnicodeDecodeError:
+            #incase we have a decode error just represent as byte string
+            u_str = unicode(str(str).encode('string_escape'))
+        
+    return u_str
  No newline at end of file

pylons_app/lib/indexers/daemon.py

@@ -36,6 +36,7 b' from pidlock import LockHeld, DaemonLock'
 import traceback
 from pylons_app.config.environment import load_environment
 from pylons_app.model.hg_model import HgModel
+from pylons_app.lib.helpers import safe_unicode
 from whoosh.index import create_in, open_dir
 from shutil import rmtree
 from pylons_app.lib.indexers import ANALYZER, INDEX_EXTENSIONS, IDX_LOCATION, \
@@ -77,11 +78,7 b' class WhooshIndexingDaemon(object):'
             fobj = open(path, 'rb')
             content = fobj.read()
             fobj.close()
-            try:
-                u_content = unicode(content)
-            except UnicodeDecodeError:
-                #incase we have a decode error just represent as byte string
-                u_content = unicode(str(content).encode('string_escape'))
+            u_content = safe_unicode(content)
         else:
             log.debug('    >> %s' % path)
             #just index file name without it's content