Wire up error handlers.

Replace some 400s with more appropriate 500s.

DAO methods that cause unexpected exceptions get caught and
logged by errors.py 500 error handler.

app/errors.py

@@ -1,36 +1,34 @@
-from flask import (jsonify, current_app)
-
-from app.main import main
+from flask import (
+    jsonify,
+    current_app
+)
 
 
-@main.app_errorhandler(400)
-def bad_request(e):
-    return jsonify(error=str(e.description)), 400
+def register_errors(blueprint):
 
+    @blueprint.app_errorhandler(400)
+    def bad_request(e):
+        return jsonify(error=str(e.description)), 400
 
-@main.app_errorhandler(401)
-def unauthorized(e):
-    error_message = "Unauthorized, authentication token must be provided"
-    return jsonify(error=error_message), 401, [('WWW-Authenticate', 'Bearer')]
+    @blueprint.app_errorhandler(401)
+    def unauthorized(e):
+        error_message = "Unauthorized, authentication token must be provided"
+        return jsonify(error=error_message), 401, [('WWW-Authenticate', 'Bearer')]
 
+    @blueprint.app_errorhandler(403)
+    def forbidden(e):
+        error_message = "Forbidden, invalid authentication token provided"
+        return jsonify(error=error_message), 403
 
-@main.app_errorhandler(403)
-def forbidden(e):
-    error_message = "Forbidden, invalid authentication token provided"
-    return jsonify(error=error_message), 403
+    @blueprint.app_errorhandler(404)
+    def page_not_found(e):
+        return jsonify(error=e.description or "Not found"), 404
 
+    @blueprint.app_errorhandler(429)
+    def limit_exceeded(e):
+        return jsonify(error=str(e.description)), 429
 
-@main.app_errorhandler(404)
-def page_not_found(e):
-    return jsonify(error=e.description or "Not found"), 404
-
-
-@main.app_errorhandler(429)
-def limit_exceeded(e):
-    return jsonify(error=str(e.description)), 429
-
-
-@main.app_errorhandler(500)
-def internal_server_error(e):
-    current_app.logger.exception(e)
-    return jsonify(error="Internal error"), 500
+    @blueprint.app_errorhandler(500)
+    def internal_server_error(e):
+        current_app.logger.exception(e)
+        return jsonify(error="Internal error"), 500

app/job/rest.py

@@ -31,6 +31,10 @@ from app.schemas import (
 job = Blueprint('job', __name__, url_prefix='/service/<service_id>/job')
 
 
+from app.errors import register_errors
+register_errors(job)
+
+
 @job.route('/<job_id>', methods=['GET'])
 @job.route('', methods=['GET'])
 def get_job_for_service(service_id, job_id=None):
@@ -54,11 +58,10 @@ def create_job(service_id):
     job, errors = job_schema.load(request.get_json())
     if errors:
         return jsonify(result="error", message=errors), 400
-    try:
-        save_job(job)
-        _enqueue_job(job)
-    except Exception as e:
-        return jsonify(result="error", message=str(e)), 500
+
+    save_job(job)
+    _enqueue_job(job)
+
     return jsonify(data=job_schema.dump(job).data), 201
 
 
@@ -69,10 +72,9 @@ def update_job(service_id, job_id):
     update_dict, errors = job_schema_load_json.load(request.get_json())
     if errors:
         return jsonify(result="error", message=errors), 400
-    try:
-        save_job(job, update_dict=update_dict)
-    except Exception as e:
-        return jsonify(result="error", message=str(e)), 400
+
+    save_job(job, update_dict=update_dict)
+
     return jsonify(data=job_schema.dump(job).data), 200
 
 
@@ -84,10 +86,9 @@ def create_notification_for_job(service_id, job_id):
     notification, errors = notification_status_schema.load(request.get_json())
     if errors:
         return jsonify(result="error", message=errors), 400
-    try:
-        notifications_dao.save_notification(notification)
-    except Exception as e:
-        return jsonify(result="error", message=str(e)), 500
+
+    notifications_dao.save_notification(notification)
+
     return jsonify(data=notification_status_schema.dump(notification).data), 201
 
 
@@ -117,10 +118,8 @@ def update_notification_for_job(service_id, job_id, notification_id):
 
     if errors:
         return jsonify(result="error", message=errors), 400
-    try:
-        notifications_dao.save_notification(notification, update_dict=update_dict)
-    except Exception as e:
-        return jsonify(result="error", message=str(e)), 400
+
+    notifications_dao.save_notification(notification, update_dict=update_dict)
 
     return jsonify(data=job_schema.dump(notification).data), 200
 

app/notifications/rest.py

@@ -19,6 +19,9 @@ from sqlalchemy.orm.exc import NoResultFound
 
 notifications = Blueprint('notifications', __name__)
 
+from app.errors import register_errors
+register_errors(notifications)
+
 
 def create_notification_id():
     return str(uuid.uuid4())

app/service/rest.py

@@ -1,10 +1,9 @@
 from datetime import datetime
 
-from flask import (jsonify, request)
+from flask import (jsonify, request, abort)
 from sqlalchemy.exc import DataError
 from sqlalchemy.orm.exc import NoResultFound
 
-from app import db
 from app.dao import DAOException
 from app.dao.services_dao import (
     save_model_service, get_model_services, delete_model_service)
@@ -19,6 +18,9 @@ from app.schemas import (
 from flask import Blueprint
 service = Blueprint('service', __name__)
 
+from app.errors import register_errors
+register_errors(service)
+
 
 @service.route('', methods=['POST'])
 def create_service():
@@ -31,7 +33,7 @@ def create_service():
     try:
         save_model_service(service)
     except DAOException as e:
-        return jsonify(result="error", message=str(e)), 400
+        return jsonify(result="error", message=str(e)), 500
     return jsonify(data=service_schema.dump(service).data), 201
 
 
@@ -54,7 +56,7 @@ def update_service(service_id):
         try:
             save_model_service(service, update_dict=update_dict)
         except DAOException as e:
-            return jsonify(result="error", message=str(e)), 400
+            return jsonify(result="error", message=str(e)), 500
     return jsonify(data=service_schema.dump(service).data), status_code
 
 
@@ -88,7 +90,7 @@ def renew_api_key(service_id=None):
         key = ApiKey(service=service, name=secret_name)
         save_model_api_key(key)
     except DAOException as e:
-        return jsonify(result='error', message=str(e)), 400
+        return jsonify(result='error', message=str(e)), 500
     unsigned_api_key = get_unsigned_secret(key.id)
     return jsonify(data=unsigned_api_key), 201
 
@@ -122,7 +124,7 @@ def get_api_keys(service_id, key_id=None):
         else:
             api_keys = get_model_api_keys(service_id=service_id)
     except DAOException as e:
-        return jsonify(result='error', message=str(e)), 400
+        return jsonify(result='error', message=str(e)), 500
     except NoResultFound:
         return jsonify(result="error", message="API key not found"), 404
 
@@ -172,7 +174,7 @@ def update_template(service_id, template_id):
         try:
             save_model_template(template, update_dict=update_dict)
         except DAOException as e:
-            return jsonify(result="error", message=str(e)), 400
+            return jsonify(result="error", message=str(e)), 500
     return jsonify(data=template_schema.dump(template).data), status_code
 
 

app/template/rest.py

@@ -1,5 +1,8 @@
-from flask import Blueprint
-from flask import (jsonify)
+from flask import (
+    Blueprint,
+    jsonify
+)
+
 from sqlalchemy.exc import DataError
 from sqlalchemy.orm.exc import NoResultFound
 
@@ -8,6 +11,9 @@ from app.schemas import (template_schema, templates_schema)
 
 template = Blueprint('template', __name__)
 
+from app.errors import register_errors
+register_errors(template)
+
 
 # I am going to keep these for admin like operations
 # Permissions should restrict who can access this endpoint

app/user/rest.py

@@ -22,6 +22,9 @@ from app import api_user
 
 user = Blueprint('user', __name__)
 
+from app.errors import register_errors
+register_errors(user)
+
 
 @user.route('', methods=['POST'])
 def create_user():

tests/app/service/test_rest.py

@@ -146,7 +146,7 @@ def test_post_service_without_users_attribute(notify_api, notify_db, notify_db_s
                 url_for('service.create_service'),
                 data=json.dumps(data),
                 headers=headers)
-            assert resp.status_code == 400
+            assert resp.status_code == 500
             assert Service.query.count() == 0
             json_resp = json.loads(resp.get_data(as_text=True))
             assert json_resp['message'] == '{"users": ["Missing data for required attribute"]}'