Add backend flask

jsonrpc/backend/flask.py

@@ -0,0 +1,39 @@
+import json
+import logging
+
+from typing import Any
+from flask.views import MethodView
+from flask import jsonify, Response, request, render_template
+
+from ..exceptions import ParseError
+
+
+log = logging.getLogger(__name__)
+
+
+def to_json(request_data: bytes) -> Any:
+    log.info(request_data)
+    try:
+        return json.loads(request_data)
+    except ValueError as e:
+        log.error('invalid json: %s', request_data)
+        log.exception(e)
+        raise ParseError(data={'message': 'Invalid JSON: {0!r}'.format(request_data)})
+        # raise ValueError('Invalid JSON')
+
+
+class APIView(MethodView):
+    def __init__(self, jsonrpc):
+        self.jsonrpc = jsonrpc
+        log.debug('Connect JSON-RPC to Flask complete')
+
+    def get(self):
+        pagedata = {'title': 'API Browse'}
+        body = render_template('api_browse.html', pagedata=pagedata)
+        return body
+
+    def post(self):
+        json_data = to_json(request.data)
+        result = self.jsonrpc(json_data)
+        log.error(result)
+        return jsonify(result)