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xchainP2pProxy.go
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xchainP2pProxy.go
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/*
* Copyright (c) 2019. Baidu Inc. All Rights Reserved.
*/
package prxyxchain
import (
"context"
"io"
log "github.com/sirupsen/logrus"
"google.golang.org/grpc"
"github.com/xuperchain/xuper-front/config"
util_cert "github.com/xuperchain/xuper-front/util/cert"
"github.com/xuperchain/xuper-front/xuperp2p"
)
type XchainP2pProxy struct {
host string
conn *grpc.ClientConn
}
var xchainProxy *XchainP2pProxy
func GetXchainP2pProxy() *XchainP2pProxy {
if xchainProxy == nil {
//初始化
var conn *grpc.ClientConn
var err error
if config.GetCaConfig().CaSwitch {
creds, err := util_cert.GenCreds()
if err != nil {
log.Printf("failed to serve: %v\n", err)
return nil
}
conn, err = grpc.Dial(config.GetXchainServer().Host, grpc.WithTransportCredentials(creds))
if err != nil {
log.Printf("failed to serve: %v\n", err)
return nil
}
} else {
conn, err = grpc.Dial(config.GetXchainServer().Host, grpc.WithInsecure())
if err != nil {
log.Printf("failed to serve: %v\n", err)
return nil
}
}
xchainProxy = &XchainP2pProxy{
conn: conn,
}
return xchainProxy
}
connState := xchainProxy.conn.GetState().String()
if connState == "TRANSIENT_FAILURE" || connState == "SHUTDOWN" || connState == "Invalid-State" {
//初始化
var conn *grpc.ClientConn
var err error
if config.GetCaConfig().CaSwitch {
creds, err := util_cert.GenCreds()
if err != nil {
log.Printf("failed to serve: %v\n", err)
return nil
}
conn, err = grpc.Dial(config.GetXchainServer().Host, grpc.WithTransportCredentials(creds))
if err != nil {
log.Printf("failed to serve: %v\n", err)
return nil
}
} else {
conn, err = grpc.Dial(config.GetXchainServer().Host, grpc.WithInsecure())
if err != nil {
log.Printf("failed to serve: %v\n", err)
return nil
}
}
xchainProxy.conn = conn
}
return xchainProxy
}
// @todo 复用一个conn 会出问题, 后面再排查下原因吧
func (cli *XchainP2pProxy) Defer() {
//cli.conn.Close()
}
func (cli *XchainP2pProxy) newClient() (xuperp2p.P2PServiceClient, error) {
client := xuperp2p.NewP2PServiceClient(cli.conn)
return client, nil
}
// SendMessage send message to a peer
func (cli *XchainP2pProxy) SendMessage(ctx context.Context, msg *xuperp2p.XuperMessage) error {
client, err := cli.newClient()
if err != nil {
return err
}
ctx, cancel := context.WithCancel(ctx)
defer cancel()
stream, err := client.SendP2PMessage(ctx)
if err != nil {
return err
}
waitc := make(chan struct{})
go func() {
for {
_, err = stream.Recv()
if err == io.EOF {
close(waitc)
return
}
if err != nil {
close(waitc)
return
}
}
}()
err = stream.Send(msg)
if err != nil {
stream.CloseSend()
return err
}
stream.CloseSend()
<-waitc
if err == io.EOF {
return nil
}
log.Debug("proxy SendMessage msg:", msg)
return err
}
// SendMessageWithResponse send message to a peer with responce
func (cli *XchainP2pProxy) SendMessageWithResponse(ctx context.Context, msg *xuperp2p.XuperMessage) (*xuperp2p.XuperMessage, error) {
client, err := cli.newClient()
if err != nil {
return nil, err
}
ctx, cancel := context.WithCancel(ctx)
defer cancel()
stream, err := client.SendP2PMessage(ctx)
if err != nil {
return nil, err
}
res := &xuperp2p.XuperMessage{}
waitc := make(chan struct{})
go func() {
for {
res, err = stream.Recv()
if err == io.EOF {
close(waitc)
return
}
if err != nil {
close(waitc)
return
}
if res != nil {
close(waitc)
return
}
}
}()
err = stream.Send(msg)
if err != nil {
stream.CloseSend()
return nil, err
}
stream.CloseSend()
<-waitc
log.Debug("proxy SendMessageWithResponse ret:", res, err)
return res, err
}