You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
176 lines
4.3 KiB
176 lines
4.3 KiB
package server
|
|
|
|
import (
|
|
"bufio"
|
|
"fmt"
|
|
"io"
|
|
"net"
|
|
"strings"
|
|
"sync"
|
|
|
|
. "github.com/tendermint/go-common"
|
|
"github.com/tendermint/tmsp/types"
|
|
)
|
|
|
|
// var maxNumberConnections = 2
|
|
|
|
type Server struct {
|
|
QuitService
|
|
|
|
proto string
|
|
addr string
|
|
listener net.Listener
|
|
|
|
appMtx sync.Mutex
|
|
app types.Application
|
|
}
|
|
|
|
func NewServer(protoAddr string, app types.Application) (*Server, error) {
|
|
parts := strings.SplitN(protoAddr, "://", 2)
|
|
proto, addr := parts[0], parts[1]
|
|
s := &Server{
|
|
proto: proto,
|
|
addr: addr,
|
|
listener: nil,
|
|
app: app,
|
|
}
|
|
s.QuitService = *NewQuitService(nil, "TMSPServer", s)
|
|
s.Start() // Just start it
|
|
return s, nil
|
|
}
|
|
|
|
func (s *Server) OnStart() error {
|
|
s.QuitService.OnStart()
|
|
ln, err := net.Listen(s.proto, s.addr)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
s.listener = ln
|
|
go s.acceptConnectionsRoutine()
|
|
return nil
|
|
}
|
|
|
|
func (s *Server) OnStop() {
|
|
s.QuitService.OnStop()
|
|
s.listener.Close()
|
|
}
|
|
|
|
func (s *Server) acceptConnectionsRoutine() {
|
|
// semaphore := make(chan struct{}, maxNumberConnections)
|
|
|
|
for {
|
|
// semaphore <- struct{}{}
|
|
|
|
// Accept a connection
|
|
fmt.Println("Waiting for new connection...")
|
|
conn, err := s.listener.Accept()
|
|
if err != nil {
|
|
if !s.IsRunning() {
|
|
return // Ignore error from listener closing.
|
|
}
|
|
Exit("Failed to accept connection: " + err.Error())
|
|
} else {
|
|
fmt.Println("Accepted a new connection")
|
|
}
|
|
|
|
closeConn := make(chan error, 2) // Push to signal connection closed
|
|
responses := make(chan *types.Response, 1000) // A channel to buffer responses
|
|
|
|
// Read requests from conn and deal with them
|
|
go s.handleRequests(closeConn, conn, responses)
|
|
// Pull responses from 'responses' and write them to conn.
|
|
go s.handleResponses(closeConn, responses, conn)
|
|
|
|
go func() {
|
|
// Wait until signal to close connection
|
|
errClose := <-closeConn
|
|
if errClose != nil {
|
|
fmt.Printf("Connection error: %v\n", errClose)
|
|
} else {
|
|
fmt.Println("Connection was closed.")
|
|
}
|
|
|
|
// Close the connection
|
|
err := conn.Close()
|
|
if err != nil {
|
|
fmt.Printf("Error in closing connection: %v\n", err)
|
|
}
|
|
|
|
// <-semaphore
|
|
}()
|
|
}
|
|
}
|
|
|
|
// Read requests from conn and deal with them
|
|
func (s *Server) handleRequests(closeConn chan error, conn net.Conn, responses chan<- *types.Response) {
|
|
var count int
|
|
var bufReader = bufio.NewReader(conn)
|
|
for {
|
|
|
|
var req = &types.Request{}
|
|
err := types.ReadMessage(bufReader, req)
|
|
if err != nil {
|
|
if err == io.EOF {
|
|
closeConn <- fmt.Errorf("Connection closed by client")
|
|
} else {
|
|
closeConn <- fmt.Errorf("Error in handleRequests: %v", err.Error())
|
|
}
|
|
return
|
|
}
|
|
s.appMtx.Lock()
|
|
count++
|
|
s.handleRequest(req, responses)
|
|
s.appMtx.Unlock()
|
|
}
|
|
}
|
|
|
|
func (s *Server) handleRequest(req *types.Request, responses chan<- *types.Response) {
|
|
switch req.Type {
|
|
case types.MessageType_Echo:
|
|
responses <- types.ResponseEcho(string(req.Data))
|
|
case types.MessageType_Flush:
|
|
responses <- types.ResponseFlush()
|
|
case types.MessageType_Info:
|
|
data := s.app.Info()
|
|
responses <- types.ResponseInfo(data)
|
|
case types.MessageType_SetOption:
|
|
logStr := s.app.SetOption(req.Key, req.Value)
|
|
responses <- types.ResponseSetOption(logStr)
|
|
case types.MessageType_AppendTx:
|
|
code, result, logStr := s.app.AppendTx(req.Data)
|
|
responses <- types.ResponseAppendTx(code, result, logStr)
|
|
case types.MessageType_CheckTx:
|
|
code, result, logStr := s.app.CheckTx(req.Data)
|
|
responses <- types.ResponseCheckTx(code, result, logStr)
|
|
case types.MessageType_Commit:
|
|
hash, logStr := s.app.Commit()
|
|
responses <- types.ResponseCommit(hash, logStr)
|
|
case types.MessageType_Query:
|
|
code, result, logStr := s.app.Query(req.Data)
|
|
responses <- types.ResponseQuery(code, result, logStr)
|
|
default:
|
|
responses <- types.ResponseException("Unknown request")
|
|
}
|
|
}
|
|
|
|
// Pull responses from 'responses' and write them to conn.
|
|
func (s *Server) handleResponses(closeConn chan error, responses <-chan *types.Response, conn net.Conn) {
|
|
var count int
|
|
var bufWriter = bufio.NewWriter(conn)
|
|
for {
|
|
var res = <-responses
|
|
err := types.WriteMessage(res, bufWriter)
|
|
if err != nil {
|
|
closeConn <- fmt.Errorf("Error in handleResponses: %v", err.Error())
|
|
return
|
|
}
|
|
if res.Type == types.MessageType_Flush {
|
|
err = bufWriter.Flush()
|
|
if err != nil {
|
|
closeConn <- fmt.Errorf("Error in handleResponses: %v", err.Error())
|
|
return
|
|
}
|
|
}
|
|
count++
|
|
}
|
|
}
|