Delete graphql/service.go

graphql/service.go

@@ -1,132 +0,0 @@
-// Copyright 2019 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Lesser General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// The go-ethereum library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public License
-// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-
-package graphql
-
-import (
-	"context"
-	"encoding/json"
-	"net/http"
-	"strconv"
-	"sync"
-	"time"
-
-	"github.com/ethereum/go-ethereum/eth/filters"
-	"github.com/ethereum/go-ethereum/internal/ethapi"
-	"github.com/ethereum/go-ethereum/node"
-	"github.com/ethereum/go-ethereum/rpc"
-	"github.com/graph-gophers/graphql-go"
-	gqlErrors "github.com/graph-gophers/graphql-go/errors"
-)
-
-type handler struct {
-	Schema *graphql.Schema
-}
-
-func (h handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
-	var params struct {
-		Query         string                 `json:"query"`
-		OperationName string                 `json:"operationName"`
-		Variables     map[string]interface{} `json:"variables"`
-	}
-	if err := json.NewDecoder(r.Body).Decode(&params); err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
-		return
-	}
-
-	var (
-		ctx       = r.Context()
-		responded sync.Once
-		timer     *time.Timer
-		cancel    context.CancelFunc
-	)
-	ctx, cancel = context.WithCancel(ctx)
-	defer cancel()
-
-	if timeout, ok := rpc.ContextRequestTimeout(ctx); ok {
-		timer = time.AfterFunc(timeout, func() {
-			responded.Do(func() {
-				// Cancel request handling.
-				cancel()
-
-				// Create the timeout response.
-				response := &graphql.Response{
-					Errors: []*gqlErrors.QueryError{{Message: "request timed out"}},
-				}
-				responseJSON, err := json.Marshal(response)
-				if err != nil {
-					http.Error(w, err.Error(), http.StatusInternalServerError)
-					return
-				}
-
-				// Setting this disables gzip compression in package node.
-				w.Header().Set("Transfer-Encoding", "identity")
-
-				// Flush the response. Since we are writing close to the response timeout,
-				// chunked transfer encoding must be disabled by setting content-length.
-				w.Header().Set("Content-Type", "application/json")
-				w.Header().Set("Content-Length", strconv.Itoa(len(responseJSON)))
-				w.Write(responseJSON)
-				if flush, ok := w.(http.Flusher); ok {
-					flush.Flush()
-				}
-			})
-		})
-	}
-
-	response := h.Schema.Exec(ctx, params.Query, params.OperationName, params.Variables)
-	if timer != nil {
-		timer.Stop()
-	}
-	responded.Do(func() {
-		responseJSON, err := json.Marshal(response)
-		if err != nil {
-			http.Error(w, err.Error(), http.StatusInternalServerError)
-			return
-		}
-		w.Header().Set("Content-Type", "application/json")
-		if len(response.Errors) > 0 {
-			w.WriteHeader(http.StatusBadRequest)
-		}
-		w.Write(responseJSON)
-	})
-}
-
-// New constructs a new GraphQL service instance.
-func New(stack *node.Node, backend ethapi.Backend, filterSystem *filters.FilterSystem, cors, vhosts []string) error {
-	_, err := newHandler(stack, backend, filterSystem, cors, vhosts)
-	return err
-}
-
-// newHandler returns a new `http.Handler` that will answer GraphQL queries.
-// It additionally exports an interactive query browser on the / endpoint.
-func newHandler(stack *node.Node, backend ethapi.Backend, filterSystem *filters.FilterSystem, cors, vhosts []string) (*handler, error) {
-	q := Resolver{backend, filterSystem}
-
-	s, err := graphql.ParseSchema(schema, &q)
-	if err != nil {
-		return nil, err
-	}
-	h := handler{Schema: s}
-	handler := node.NewHTTPHandlerStack(h, cors, vhosts, nil)
-
-	stack.RegisterHandler("GraphQL UI", "/graphql/ui", GraphiQL{})
-	stack.RegisterHandler("GraphQL UI", "/graphql/ui/", GraphiQL{})
-	stack.RegisterHandler("GraphQL", "/graphql", handler)
-	stack.RegisterHandler("GraphQL", "/graphql/", handler)
-
-	return &h, nil
-}