Wrapping APISpecsView get response in a try except (flasgger#420)

* Styling fixes, notes in README and 0.6.2 release

* Wrapping APISpecsView get response in a try except

* Wrapping APISpecsView get response in a try except

* Wrapping APISpecsView get response in a try except

* Wrapping APISpecsView get response in a try except

* Wrapping APISpecsView get response in a try except

* Fix TypeError caused by json version 2.0.9

* added test for flasgger.base.APISpecsView

* added test for flasgger.base.APISpecsView

* added test for flasgger.base.APISpecsView

Author: Danucas

flasgger/base.py

@@ -19,7 +19,7 @@
 from flask import Blueprint
 from flask import Markup
 from flask import current_app
-from flask import jsonify
+from flask import jsonify, Response
 from flask import redirect
 from flask import render_template
 from flask import request, url_for
@@ -144,7 +144,11 @@ def get(self):
         """
         The Swagger view get method outputs to /apispecs_1.json
         """
-        return jsonify(self.loader())
+        try:
+            return jsonify(self.loader())
+        except Exception:
+            specs = json.dumps(self.loader())
+            return Response(specs, mimetype='application/json')
 
 
 class SwaggerDefinition(object):
@@ -635,7 +639,6 @@ def wrap_view(view):
                         self.get_apispecs, endpoint=spec['endpoint'])
                 ))
             )
-
         app.register_blueprint(blueprint)
 
     def add_headers(self, app):

tests/test_apispecs.py

@@ -0,0 +1,22 @@
+#!/usr/bin/python3
+import pytest
+import sys
+import flasgger
+import flask
+import json
+from collections import defaultdict
+
+def test_client():
+    class FakeJson():
+        def dumps(self, *args, **kwargs):
+            """
+            Raises a type error
+            """
+            raise TypeError
+    flask.json._json = FakeJson()
+    app = flask.Flask('test-app')
+    flasgger.base.jsonify = flask.jsonify
+    with app.app_context():
+        specs = flasgger.base.APISpecsView(loader=lambda: {'test': 'test'})
+        assert specs.get() != None
+    flask.json._json = json