Use URLs instead of filenames.

URLs are important to being read, not files.

src/zc/buildout/networkcache.py

@@ -68,9 +68,9 @@ def download_network_cached(dir_url, cache_url, path, url, logger, md5sum=None):
 
 
     directory_key = get_directory_key(url)
-    file_name = os.path.basename(url)
+    url = os.path.basename(url)
 
-    logger.info('Downloading %s from network cache.' % file_name)
+    logger.info('Downloading %s from network cache.' % url)
     try:
         nc = NetworkcacheClient(shacache=cache_url, shadir=dir_url)
         file_descriptor = nc.select(directory_key)
@@ -84,12 +84,12 @@ def download_network_cached(dir_url, cache_url, path, url, logger, md5sum=None):
             file_descriptor.close()
 
         if not check_md5sum(path, md5sum):
-            logger.info('MD5 checksum mismatch downloading %s' % file_name)
+            logger.info('MD5 checksum mismatch downloading %s' % url)
             return False
 
     except (IOError, DirectoryNotFound), e:
         logger.info('Failed to download from network cache %s: %s' % \
-                                                       (file_name, str(e)))
+                                                       (url, str(e)))
         return False
     return True