upload: Support metadata in json file

slapos/libnetworkcache.py

@@ -502,8 +502,10 @@ def cmd_upload(*args):
     help="Upload the contents of this file, overriding --url")
   parser.add_argument('--id',
     help="Identifier used for the shadir URL. Overriding --prefix-key, --suffix-key and --url")
+  parser.add_argument('--metadata',
+    help="Take a file containing a json-serializable dictionary with shadir metadata.")
   parser.add_argument('meta', nargs='*', metavar='KEY=VALUE',
-    help="Extra metadata.")
+    help="Extra metadata. Warning: interpreted as string.")
   args = parser.parse_args(args or sys.argv[1:])
   nc = NetworkcacheClient(args.config)
   f = None
@@ -517,15 +519,25 @@ def cmd_upload(*args):
       f = (nc.archive if os.path.isdir(args.url) else urlopen)(args.url)
     else:
       parser.error('either --file or --url is required')
-    kw = dict(x.split('=', 1) for x in args.meta)
+    if args.metadata:
+      with open(args.metadata) as g:
+        try:
+          metadata_dict = json.loads(g.read())
+          if type(metadata_dict) != dict:
+            raise NetworkcacheException("Not a json-serializable dictionary: %s" % args.metadata)
+        except json.decoder.JSONDecodeError:
+          raise NetworkcacheException("Invalid json in %s" % args.metadata)
+    else:
+      metadata_dict = dict()
+    metadata_dict.update(dict(x.split('=', 1) for x in args.meta))
     if args.id:
-      kw.setdefault('id', args.id)
+      metadata_dict.setdefault('id', args.id)
       key = args.id
     else:
-      kw.setdefault('url', args.url)
+      metadata_dict.setdefault('url', args.url)
       urlmd5 = hashlib.md5(args.url.encode()).hexdigest()
       key = args.prefix_key + urlmd5 + args.suffix_key
-    nc.upload(f, key, **kw)
+    nc.upload(f, key, **metadata_dict)
   finally:
     f is None or f.close()