Print messages that are less frightening

src/zc/buildout/networkcache.py

@@ -18,6 +18,7 @@ import os
 import posixpath
 import re
 import shutil
+import urllib2
 import urlparse
 import traceback
 
@@ -106,7 +107,7 @@ def download_network_cached(dir_url, cache_url, path, url, logger,
       logger.warning('Incompatible version of networkcache, not using it.')
       return False
 
-    logger.info('Downloading %s from network cache.' % url)
+    logger.debug('Trying to download %s from network cache...' % url)
     try:
         file_descriptor = nc.select(directory_key)
 
@@ -116,14 +117,18 @@ def download_network_cached(dir_url, cache_url, path, url, logger,
         finally:
             f.close()
             file_descriptor.close()
+            logger.info('Downloaded %s from network cache.' % url)
 
         if not check_md5sum(path, md5sum):
             logger.info('MD5 checksum mismatch downloading %s' % url)
             return False
 
     except (IOError, DirectoryNotFound), e:
-        logger.info('Failed to download from network cache %s: %s' % \
-                                                       (url, str(e)))
+        if isinstance(e, urllib2.HTTPError) and e.code == 404:
+          logger.debug('%s does not exist in network cache.' % url)
+        else:
+          logger.debug('Failed to download from network cache %s: %s' % \
+                                                         (url, str(e)))
         return False
     return True