following last modification on libnetworkcache.

the behavior still the same.

src/zc/buildout/networkcache.py

@@ -21,7 +21,7 @@ import urllib
 import urlparse
 from download import check_md5sum
 from slapos.libnetworkcache import NetworkcacheClient, UploadError, \
-                                   MultipleFileFoundError, DirectoryNotFound
+                                   DirectoryNotFound
 
 
 _md5_re = re.compile(r'md5=([a-f0-9]+)')
@@ -81,21 +81,27 @@ def download_network_cached(sha_dir, sha_cache, path, url, logger, md5sum=None):
         md5sum = _get_md5_from_url(url)
 
 
-    sha512sum = select_sha512sum_from_shadir(sha_dir, url, logger)
-    if sha512sum is None:
-      return False
+    directory_key = get_directory_key(url)
+    file_name = os.path.basename(url)
+
+    logger.info('Downloading %s from network cache.' % file_name)
+    try:
+        nc = NetworkcacheClient(shacache=sha_cache, shadir=sha_dir)
+        file_content = nc.select(directory_key)
 
-    sha_cache_url = os.path.join(sha_cache, sha512sum)
-    logger.info('Downloading from network cache %s' % sha_cache_url)
+        f = open(path, 'w+b')
         try:
-        nc = NetworkcacheClient(shacache=sha_cache)
-        nc.download(path, sha512sum)
+          f.write(file_content)
+        finally:
+          f.close()
+
         if not check_md5sum(path, md5sum):
-            logger.info('MD5 checksum mismatch downloading %r' % sha_cache_url)
+            logger.info('MD5 checksum mismatch downloading %s' % file_name)
             return False
-    except IOError, e:
+
+    except (IOError, DirectoryNotFound), e:
         logger.info('Fail to download from network cache %s: %s' % \
-                                                  (sha_cache_url, str(e)))
+                                                       (file_name, str(e)))
         return False
     return True