Adding cached_path to input file of the predictor (#3098)

allennlp/commands/predict.py

@@ -55,6 +55,7 @@
 
 from allennlp.commands.subcommand import Subcommand
 from allennlp.common.checks import check_for_gpu, ConfigurationError
+from allennlp.common.file_utils import cached_path
 from allennlp.common.util import lazy_groups_of
 from allennlp.models.archival import load_archive
 from allennlp.predictors.predictor import Predictor, JsonDict
@@ -68,7 +69,7 @@ def add_subparser(self, name: str, parser: argparse._SubParsersAction) -> argpar
                 name, description=description, help='Use a trained model to make predictions.')
 
         subparser.add_argument('archive_file', type=str, help='the archived model to make predictions with')
-        subparser.add_argument('input_file', type=str, help='path to input file')
+        subparser.add_argument('input_file', type=str, help='path to or url of the input file')
 
         subparser.add_argument('--output-file', type=str, help='path to output file')
         subparser.add_argument('--weights-file',
@@ -177,7 +178,8 @@ def _get_json_data(self) -> Iterator[JsonDict]:
                 if not line.isspace():
                     yield self._predictor.load_line(line)
         else:
-            with open(self._input_file, "r") as file_input:
+            input_file = cached_path(self._input_file)
+            with open(input_file, "r") as file_input:
                 for line in file_input:
                     if not line.isspace():
                         yield self._predictor.load_line(line)