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/
jsonrpc.go
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/
jsonrpc.go
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/*
Copyright 2017 Loopring Project Ltd (Loopring Foundation).
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package gateway
import (
"fmt"
"github.com/Loopring/relay-lib/log"
"github.com/ethereum/go-ethereum/rpc"
"github.com/rs/cors"
"net"
"net/http"
)
type JsonrpcOptions struct {
Port string
}
func (*JsonrpcServiceImpl) Ping(val string, val2 int) (res string, err error) {
res = "pong for first connect, meaning server is OK"
return
}
type JsonrpcService interface {
Start(port string)
Stop()
}
type JsonrpcServiceImpl struct {
port string
walletService *WalletServiceImpl
}
func NewJsonrpcService(port string, walletService *WalletServiceImpl) *JsonrpcServiceImpl {
l := &JsonrpcServiceImpl{}
l.port = port
l.walletService = walletService
return l
}
func (j *JsonrpcServiceImpl) Start() {
handler := rpc.NewServer()
if err := handler.RegisterName("loopring", j.walletService); err != nil {
fmt.Println(err)
return
}
var (
listener net.Listener
err error
)
if listener, err = net.Listen("tcp", ":"+j.port); err != nil {
return
}
//httpServer := rpc.NewHTTPServer([]string{"*"}, handler)
httpServer := &http.Server{Handler: newCorsHandler(handler, []string{"*"})}
//httpServer.Handler = newCorsHandler(handler, []string{"*"})
go httpServer.Serve(listener)
log.Info(fmt.Sprintf("HTTP endpoint opened on " + j.port))
return
}
func newCorsHandler(srv *rpc.Server, allowedOrigins []string) http.Handler {
// disable CORS support if user has not specified a custom CORS configuration
if len(allowedOrigins) == 0 {
return srv
}
c := cors.New(cors.Options{
AllowedOrigins: allowedOrigins,
AllowedMethods: []string{"POST", "GET"},
MaxAge: 600,
AllowedHeaders: []string{"*"},
AllowCredentials: true,
})
return c.Handler(srv)
}