Backport jsonify method which supports list as input.

module_build_service/backports.py

@@ -0,0 +1,56 @@
+# -*- coding: utf-8 -*-
+# Copyright (c) 2018  Red Hat, Inc.
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+#
+# Written by Jan Kaluza <jkaluza@redhat.com>
+
+from flask.json import dumps
+from flask import request
+
+from module_build_service import app
+
+
+def jsonify(*args, **kwargs):
+    # This is `flask.jsonify` version which supports Python list as an input.
+    # We cannot use real `jsonify`, because it can handle Python lists as
+    # input only since 0.11, but RHEL7 contains 0.10.1.
+    # https://github.com/pallets/flask/commit/daceb3e3a028b4b408c4bbdbdef0047f1de3a7c9
+    indent = None
+    separators = (',', ':')
+
+    if app.config['JSONIFY_PRETTYPRINT_REGULAR'] and not request.is_xhr:
+        indent = 2
+        separators = (', ', ': ')
+
+    if args and kwargs:
+        raise TypeError("jsonify() behavior undefined when passed both args and kwargs")
+    elif len(args) == 1:  # single args are passed directly to dumps()
+        data = args[0]
+    elif args:  # convert multiple args into an array
+        data = list(args)
+    else:  # convert kwargs to a dict
+        data = dict(kwargs)
+
+    # Note that we add '\n' to end of response
+    # (see https://github.com/mitsuhiko/flask/pull/1262)
+    rv = app.response_class(
+        (dumps(data, indent=indent, separators=separators), '\n'),
+        mimetype='application/json')
+    return rv

module_build_service/views.py

@@ -28,7 +28,7 @@ This is the implementation of the orchestrator's public RESTful API.
 
 import json
 import module_build_service.auth
-from flask import request, jsonify, url_for
+from flask import request, url_for
 from flask.views import MethodView
 from builtins import str
 
@@ -39,6 +39,8 @@ from module_build_service.utils import (
     get_scm_url_re, cors_header, validate_api_version)
 from module_build_service.errors import (
     ValidationError, Forbidden, NotFound, ProgrammingError)
+from module_build_service.backports import jsonify
+
 
 api_routes = {
     'module_builds': {