Add JSONIFY_MIMETYPE configuration variable

Allow jsonify responses' mimetype to be configured

CHANGES

@@ -181,6 +181,7 @@ Released on June 13th 2013, codename Limoncello.
   information around which means that teardown handlers are able to
   distinguish error from success cases.
 - Added the ``JSONIFY_PRETTYPRINT_REGULAR`` configuration variable.
+- Added the ``JSONIFY_MIMETYPE`` configuration variable.
 - Flask now orders JSON keys by default to not trash HTTP caches due to
   different hash seeds between different workers.
 - Added `appcontext_pushed` and `appcontext_popped` signals.

docs/config.rst

@@ -183,6 +183,7 @@ The following configuration values are used internally by Flask:
                                   if they are not requested by an
                                   XMLHttpRequest object (controlled by
                                   the ``X-Requested-With`` header)
+``JSONIFY_MIMETYPE``              MIME type used for jsonify responses.
 ``TEMPLATES_AUTO_RELOAD``         Whether to check for modifications of
                                   the template source and reload it
                                   automatically. By default the value is

flask/app.py

@@ -315,6 +315,7 @@ def _set_request_globals_class(self, value):
         'JSON_AS_ASCII':                        True,
         'JSON_SORT_KEYS':                       True,
         'JSONIFY_PRETTYPRINT_REGULAR':          True,
+        'JSONIFY_MIMETYPE':                     'application/json',
         'TEMPLATES_AUTO_RELOAD':                None,
     })
 

flask/json.py

@@ -264,7 +264,7 @@ def get_current_user():
 
     return current_app.response_class(
         (dumps(data, indent=indent, separators=separators), '\n'),
-        mimetype='application/json'
+        mimetype=current_app.config['JSONIFY_MIMETYPE']
     )
 
 

tests/test_basic.py

@@ -1029,6 +1029,18 @@ def test_jsonify_prettyprint():
         assert rv.data == pretty_response
 
 
+def test_jsonify_mimetype():
+    app = flask.Flask(__name__)
+    app.config.update({"JSONIFY_MIMETYPE": 'application/vnd.api+json'})
+    with app.test_request_context():
+        msg = {
+            "msg": {"submsg": "W00t"},
+        }
+        rv = flask.make_response(
+            flask.jsonify(msg), 200)
+        assert rv.mimetype == 'application/vnd.api+json'
+
+
 def test_url_generation():
     app = flask.Flask(__name__)