graphql-python · KingDarBoja · May 5, 2020 · Mar 16, 2020 · Mar 16, 2020 · Mar 16, 2020
diff --git a/.gitignore b/.gitignore
@@ -1,19 +1,203 @@
-*.pyc
-*.pyo
 
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diff --git a/graphql_server/__init__.py b/graphql_server/__init__.py
@@ -30,6 +30,7 @@
     "GraphQLResponse",
     "ServerResponse",
     "format_execution_result",
+    "format_error_default",
 ]
 
 
@@ -230,11 +231,11 @@ def get_response(
     as a parameter.
     """
 
-    if not params.query:
-        raise HttpQueryError(400, "Must provide query string.")
-
     # noinspection PyBroadException
     try:
+        if not params.query:
+            raise HttpQueryError(400, "Must provide query string.")
+
         # Parse document to trigger a new HttpQueryError if allow_only_query is True
         try:
             document = parse(params.query)

diff --git a/graphql_server/flask/__init__.py b/graphql_server/flask/__init__.py
@@ -0,0 +1,3 @@
+from .graphqlview import GraphQLView
+
+__all__ = ["GraphQLView"]
diff --git a/graphql_server/flask/graphqlview.py b/graphql_server/flask/graphqlview.py
@@ -0,0 +1,151 @@
+from functools import partial
+
+from flask import Response, request
+from flask.views import View
+from graphql.error import GraphQLError
+from graphql.type.schema import GraphQLSchema
+
+from graphql_server import (
+    HttpQueryError,
+    encode_execution_results,
+    format_error_default,
+    json_encode,
+    load_json_body,
+    run_http_query,
+)
+
+from .render_graphiql import render_graphiql
+
+
+class GraphQLView(View):
+    schema = None
+    executor = None
+    root_value = None
+    pretty = False
+    graphiql = False
+    graphiql_version = None
+    graphiql_template = None
+    graphiql_html_title = None
+    middleware = None
+    batch = False
+
+    methods = ["GET", "POST", "PUT", "DELETE"]
+
+    def __init__(self, **kwargs):
+        super(GraphQLView, self).__init__()
+        for key, value in kwargs.items():
+            if hasattr(self, key):
+                setattr(self, key, value)
+
+        assert isinstance(
+            self.schema, GraphQLSchema
+        ), "A Schema is required to be provided to GraphQLView."
+
+    # noinspection PyUnusedLocal
+    def get_root_value(self):
+        return self.root_value
+
+    def get_context_value(self):
+        return request
+
+    def get_middleware(self):
+        return self.middleware
+
+    def get_executor(self):
+        return self.executor
+
+    def render_graphiql(self, params, result):
+        return render_graphiql(
+            params=params,
+            result=result,
+            graphiql_version=self.graphiql_version,
+            graphiql_template=self.graphiql_template,
+            graphiql_html_title=self.graphiql_html_title,
+        )
+
+    format_error = staticmethod(format_error_default)
+    encode = staticmethod(json_encode)
+
+    def dispatch_request(self):
+        try:
+            request_method = request.method.lower()
+            data = self.parse_body()
+
+            show_graphiql = request_method == "get" and self.should_display_graphiql()
+            catch = show_graphiql
+
+            pretty = self.pretty or show_graphiql or request.args.get("pretty")
+
+            extra_options = {}
+            executor = self.get_executor()
+            if executor:
+                # We only include it optionally since
+                # executor is not a valid argument in all backends
+                extra_options["executor"] = executor
+
+            execution_results, all_params = run_http_query(
+                self.schema,
+                request_method,
+                data,
+                query_data=request.args,
+                batch_enabled=self.batch,
+                catch=catch,
+                # Execute options
+                root_value=self.get_root_value(),
+                context_value=self.get_context_value(),
+                middleware=self.get_middleware(),
+                **extra_options
+            )
+            result, status_code = encode_execution_results(
+                execution_results,
+                is_batch=isinstance(data, list),
+                format_error=self.format_error,
+                encode=partial(self.encode, pretty=pretty),
+            )
+
+            if show_graphiql:
+                return self.render_graphiql(params=all_params[0], result=result)
+
+            return Response(result, status=status_code, content_type="application/json")
+
+        except HttpQueryError as e:
+            parsed_error = GraphQLError(e.message)
+            return Response(
+                self.encode(dict(errors=[self.format_error(parsed_error)])),
+                status=e.status_code,
+                headers=e.headers,
+                content_type="application/json",
+            )
+
+    # Flask
+    def parse_body(self):
+        # We use mimetype here since we don't need the other
+        # information provided by content_type
+        content_type = request.mimetype
+        if content_type == "application/graphql":
+            return {"query": request.data.decode("utf8")}
+
+        elif content_type == "application/json":
+            return load_json_body(request.data.decode("utf8"))
+
+        elif content_type in (
+            "application/x-www-form-urlencoded",
+            "multipart/form-data",
+        ):
+            return request.form
+
+        return {}
+
+    def should_display_graphiql(self):
+        if not self.graphiql or "raw" in request.args:
+            return False
+
+        return self.request_wants_html()
+
+    def request_wants_html(self):
+        best = request.accept_mimetypes.best_match(["application/json", "text/html"])
+        return (
+            best == "text/html"
+            and request.accept_mimetypes[best]
+            > request.accept_mimetypes["application/json"]
+        )
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,3 @@
		from .graphqlview import GraphQLView

		__all__ = ["GraphQLView"]