mirror of
https://gitlab.com/pulsechaincom/go-pulse.git
synced 2024-12-23 20:07:16 +00:00
c0c01612e9
This PR significantly changes the APIs for instantiating Ethereum nodes in a Go program. The new APIs are not backwards-compatible, but we feel that this is made up for by the much simpler way of registering services on node.Node. You can find more information and rationale in the design document: https://gist.github.com/renaynay/5bec2de19fde66f4d04c535fd24f0775. There is also a new feature in Node's Go API: it is now possible to register arbitrary handlers on the user-facing HTTP server. In geth, this facility is used to enable GraphQL. There is a single minor change relevant for geth users in this PR: The GraphQL API is no longer available separately from the JSON-RPC HTTP server. If you want GraphQL, you need to enable it using the ./geth --http --graphql flag combination. The --graphql.port and --graphql.addr flags are no longer available.
53 lines
1.9 KiB
Go
53 lines
1.9 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 (
|
|
"github.com/ethereum/go-ethereum/internal/ethapi"
|
|
"github.com/ethereum/go-ethereum/node"
|
|
"github.com/graph-gophers/graphql-go"
|
|
"github.com/graph-gophers/graphql-go/relay"
|
|
)
|
|
|
|
// New constructs a new GraphQL service instance.
|
|
func New(stack *node.Node, backend ethapi.Backend, cors, vhosts []string) error {
|
|
if backend == nil {
|
|
panic("missing backend")
|
|
}
|
|
// check if http server with given endpoint exists and enable graphQL on it
|
|
return newHandler(stack, backend, 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, cors, vhosts []string) error {
|
|
q := Resolver{backend}
|
|
|
|
s, err := graphql.ParseSchema(schema, &q)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
h := &relay.Handler{Schema: s}
|
|
handler := node.NewHTTPHandlerStack(h, cors, vhosts)
|
|
|
|
stack.RegisterHandler("GraphQL UI", "/graphql/ui", GraphiQL{})
|
|
stack.RegisterHandler("GraphQL", "/graphql", handler)
|
|
stack.RegisterHandler("GraphQL", "/graphql/", handler)
|
|
|
|
return nil
|
|
}
|