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server.go
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server.go
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package falcore
import (
"http"
"fmt"
"os"
"net"
"bufio"
"time"
"io"
"crypto/rand"
"crypto/tls"
"strconv"
"sync"
"syscall"
)
type Server struct {
Addr string
Pipeline *Pipeline
listener net.Listener
listenerFile *os.File
stopAccepting chan int
handlerWaitGroup *sync.WaitGroup
logPrefix string
AcceptReady chan int
}
func NewServer(port int, pipeline *Pipeline) *Server {
s := new(Server)
s.Addr = fmt.Sprintf(":%v", port)
s.Pipeline = pipeline
s.stopAccepting = make(chan int)
s.AcceptReady = make(chan int, 1)
s.handlerWaitGroup = new(sync.WaitGroup)
s.logPrefix = fmt.Sprintf("%d", syscall.Getpid())
return s
}
func (srv *Server) FdListen(fd int) os.Error {
var err os.Error
srv.listenerFile = os.NewFile(fd, "")
if srv.listener, err = net.FileListener(srv.listenerFile); err != nil {
return err
}
if l, ok := srv.listener.(*net.TCPListener); ok {
l.SetTimeout(3e9)
} else {
return os.NewError("Broken listener isn't TCP")
}
return nil
}
func (srv *Server) socketListen() os.Error {
var la *net.TCPAddr
var err os.Error
if la, err = net.ResolveTCPAddr("tcp", srv.Addr); err != nil {
return err
}
var l *net.TCPListener
if l, err = net.ListenTCP("tcp", la); err != nil {
return err
}
srv.listener = l
if srv.listenerFile, err = l.File(); err != nil {
return err
}
if e := syscall.SetNonblock(srv.listenerFile.Fd(), true); e != 0 {
return os.Errno(e)
}
l.SetTimeout(3e9)
return nil
}
func (srv *Server) ListenAndServe() os.Error {
if srv.Addr == "" {
srv.Addr = ":http"
}
if srv.listener == nil {
if err := srv.socketListen(); err != nil {
return err
}
}
return srv.serve()
}
func (srv *Server) SocketFd() int {
return srv.listenerFile.Fd()
}
func (srv *Server) ListenAndServeTLS(certFile, keyFile string) os.Error {
if srv.Addr == "" {
srv.Addr = ":https"
}
config := &tls.Config{
Rand: rand.Reader,
Time: time.Seconds,
NextProtos: []string{"http/1.1"},
}
var err os.Error
config.Certificates = make([]tls.Certificate, 1)
config.Certificates[0], err = tls.LoadX509KeyPair(certFile, keyFile)
if err != nil {
return err
}
if srv.listener == nil {
if err := srv.socketListen(); err != nil {
return err
}
}
srv.listener = tls.NewListener(srv.listener, config)
return srv.serve()
}
func (srv *Server) StopAccepting() {
srv.stopAccepting <- 1
}
func (srv *Server) Port() int {
if l := srv.listener; l != nil {
a := l.Addr()
if _, p, e := net.SplitHostPort(a.String()); e == nil && p != "" {
server_port, _ := strconv.Atoi(p)
return server_port
}
}
return 0
}
func (srv *Server) serve() (e os.Error) {
var accept = true
srv.AcceptReady <- 1
for accept {
var c net.Conn
c, e = srv.listener.Accept()
if e != nil {
if ope, ok := e.(*net.OpError); ok {
if !(ope.Timeout() && ope.Temporary()) {
Error("%s SERVER Accept Error: %v", srv.serverLogPrefix(), ope)
}
} else {
Error("%s SERVER Accept Error: %v", srv.serverLogPrefix(), e)
}
} else {
//Trace("Handling!")
srv.handlerWaitGroup.Add(1)
go srv.handler(c)
}
select {
case <-srv.stopAccepting:
accept = false
default:
}
}
Trace("Stopped accepting, waiting for handlers")
// wait for handlers
srv.handlerWaitGroup.Wait()
return nil
}
func (srv *Server) handler(c net.Conn) {
startTime := time.Nanoseconds()
defer srv.connectionFinished(c)
buf, err := bufio.NewReaderSize(c, 8192)
if err != nil {
Error("%s Read buffer fail: %v", srv.serverLogPrefix(), err)
return
}
var req *http.Request
// no keepalive (for now)
reqCount := 0
keepAlive := true
for err == nil && keepAlive {
if req, err = http.ReadRequest(buf); err == nil {
if req.Header.Get("Connection") != "Keep-Alive" {
keepAlive = false
}
request := newRequest(req, c, startTime)
reqCount++
var res *http.Response
pssInit := new(PipelineStageStat)
pssInit.Name = "server.Init"
pssInit.StartTime = startTime
pssInit.EndTime = time.Nanoseconds()
request.appendPipelineStage(pssInit)
// execute the pipeline
if res = srv.Pipeline.execute(request); res == nil {
res = SimpleResponse(req, 404, nil, "Not Found")
}
// cleanup
request.startPipelineStage("server.ResponseWrite")
req.Body.Close()
wbuf := bufio.NewWriter(c)
res.Write(wbuf)
wbuf.Flush()
if res.Body != nil {
res.Body.Close()
}
request.finishPipelineStage()
request.finishRequest()
srv.requestFinished(request)
} else {
// EOF is socket closed
if err != io.ErrUnexpectedEOF {
Error("%s %v ERROR reading request: %v", srv.serverLogPrefix(), c.RemoteAddr(), err)
}
}
}
//Debug("%s Processed %v requests on connection %v", srv.serverLogPrefix(), reqCount, c.RemoteAddr())
}
func (srv *Server) serverLogPrefix() string {
return srv.logPrefix
}
func (srv *Server) requestFinished(request *Request) {
if srv.Pipeline.RequestDoneCallback != nil {
// Don't block the connecion for this
go srv.Pipeline.RequestDoneCallback.FilterRequest(request)
}
}
func (srv *Server) connectionFinished(c net.Conn) {
c.Close()
srv.handlerWaitGroup.Done()
}