mirror of
https://gitlab.com/pulsechaincom/go-pulse.git
synced 2024-12-22 11:31:02 +00:00
36874b63a1
This adds a cache for block logs which is shared by all filters. The cache size of is configurable using the `--cache.blocklogs` flag. Co-authored-by: Felix Lange <fjl@twurst.com>
81 lines
2.7 KiB
Go
81 lines
2.7 KiB
Go
// 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 (
|
|
"encoding/json"
|
|
"net/http"
|
|
|
|
"github.com/ethereum/go-ethereum/eth/filters"
|
|
"github.com/ethereum/go-ethereum/internal/ethapi"
|
|
"github.com/ethereum/go-ethereum/node"
|
|
"github.com/graph-gophers/graphql-go"
|
|
)
|
|
|
|
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(¶ms); err != nil {
|
|
http.Error(w, err.Error(), http.StatusBadRequest)
|
|
return
|
|
}
|
|
|
|
response := h.Schema.Exec(r.Context(), params.Query, params.OperationName, params.Variables)
|
|
responseJSON, err := json.Marshal(response)
|
|
if err != nil {
|
|
http.Error(w, err.Error(), http.StatusInternalServerError)
|
|
return
|
|
}
|
|
if len(response.Errors) > 0 {
|
|
w.WriteHeader(http.StatusBadRequest)
|
|
}
|
|
|
|
w.Header().Set("Content-Type", "application/json")
|
|
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 {
|
|
return newHandler(stack, backend, filterSystem, cors, vhosts)
|
|
}
|
|
|
|
// 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) error {
|
|
q := Resolver{backend, filterSystem}
|
|
|
|
s, err := graphql.ParseSchema(schema, &q)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
h := handler{Schema: s}
|
|
handler := node.NewHTTPHandlerStack(h, cors, vhosts, nil)
|
|
|
|
stack.RegisterHandler("GraphQL UI", "/graphql/ui", GraphiQL{})
|
|
stack.RegisterHandler("GraphQL", "/graphql", handler)
|
|
stack.RegisterHandler("GraphQL", "/graphql/", handler)
|
|
|
|
return nil
|
|
}
|