forked from valyala/fasthttp
/
server.go
985 lines (867 loc) · 23.2 KB
/
server.go
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package fasthttp
import (
"bufio"
"crypto/tls"
"errors"
"fmt"
"io"
"log"
"net"
"os"
"strings"
"sync"
"sync/atomic"
"time"
)
// ServeConn serves HTTP requests from the given connection
// using the given handler.
//
// ServeConn returns nil if all requests from the c are successfully served.
// It returns non-nil error otherwise.
//
// Connection c must immediately propagate all the data passed to Write()
// to the client. Otherwise requests' processing may hang.
//
// ServeConn closes c before returning.
//
// ServeConn uses default Server settings. Use Server.ServeConn
// for custom server tuning.
func ServeConn(c net.Conn, handler RequestHandler) error {
v := serverPool.Get()
if v == nil {
v = &Server{}
}
s := v.(*Server)
s.Handler = handler
err := s.ServeConn(c)
s.Handler = nil
serverPool.Put(v)
return err
}
var serverPool sync.Pool
// Serve serves incoming connections from the given listener
// using the given handler.
//
// Serve blocks until the given listener returns permanent error.
//
// Serve uses default Server settings. Use Server.Serve
// for custom server tuning.
func Serve(ln net.Listener, handler RequestHandler) error {
s := &Server{
Handler: handler,
}
return s.Serve(ln)
}
// ListenAndServe serves HTTP requests from the given TCP addr
// using the given handler.
//
// ListenAndServe uses default Server settings. Use Server.ListenAndServe
// for custom server tuning.
func ListenAndServe(addr string, handler RequestHandler) error {
s := &Server{
Handler: handler,
}
return s.ListenAndServe(addr)
}
// ListenAndServeTLS serves HTTPS requests from the given TCP addr
// using the given handler.
//
// certFile and keyFile are paths to TLS certificate and key files.
//
// ListenAndServeTLS uses default Server settings. Use Server.ListenAndServeTLS
// for custom server tuning.
func ListenAndServeTLS(addr, certFile, keyFile string, handler RequestHandler) error {
s := &Server{
Handler: handler,
}
return s.ListenAndServeTLS(addr, certFile, keyFile)
}
// RequestHandler must process incoming requests.
//
// RequestHandler must call ctx.TimeoutError() before return
// if it keeps references to ctx and/or its' members after the return.
// Consider wrapping RequestHandler into TimeoutHandler if response time
// must be limited.
type RequestHandler func(ctx *RequestCtx)
// Server implements HTTP server.
//
// It is forbidden copying Server instances. Create new Server instances
// instead.
type Server struct {
// Handler for processing incoming requests.
Handler RequestHandler
// Server name for sending in response headers.
//
// Default server name is used if left blank.
Name string
// The maximum number of concurrent connections the server may serve.
//
// DefaultConcurrency is used if not set.
Concurrency int
// Per-connection buffer size for requests' reading.
// This also limits the maximum header size.
//
// Default buffer size is used if 0.
ReadBufferSize int
// Per-connection buffer size for responses' writing.
//
// Default buffer size is used if 0.
WriteBufferSize int
// Maximum duration for full request reading (including body).
//
// By default request read timeout is unlimited.
ReadTimeout time.Duration
// Maximum duration for full response writing (including body).
//
// By default response write timeout is unlimited.
WriteTimeout time.Duration
// Maximum number of concurrent client connections allowed per IP.
//
// By default unlimited number of concurrent connections
// may be established to the server from a single IP address.
MaxConnsPerIP int
// Maximum number of requests served per connection.
//
// The server closes connection after the last request.
// 'Connection: close' header is added to the last request.
//
// By default unlimited number of requests served per connection.
MaxRequestsPerConn int
// Logger, which is used by RequestCtx.Logger().
//
// By default standard logger from log package is used.
Logger Logger
concurrency uint32
perIPConnCounter perIPConnCounter
serverName atomic.Value
ctxPool sync.Pool
readerPool sync.Pool
writerPool sync.Pool
}
// TimeoutHandler creates RequestHandler, which returns StatusRequestTimeout
// error with the given msg in the body to the client if h didn't return
// during the given duration.
func TimeoutHandler(h RequestHandler, timeout time.Duration, msg string) RequestHandler {
if timeout <= 0 {
return h
}
return func(ctx *RequestCtx) {
ch := ctx.timeoutCh
if ch == nil {
ch = make(chan struct{}, 1)
ctx.timeoutCh = ch
}
go func() {
h(ctx)
ch <- struct{}{}
}()
ctx.timeoutTimer = initTimer(ctx.timeoutTimer, timeout)
select {
case <-ch:
case <-ctx.timeoutTimer.C:
ctx.TimeoutError(msg)
}
stopTimer(ctx.timeoutTimer)
}
}
// RequestCtx contains incoming request and manages outgoing response.
//
// It is forbidden copying RequestCtx instances.
//
// RequestHandler should avoid holding references to incoming RequestCtx and/or
// its' members after the return.
// If holding RequestCtx references after the return is unavoidable
// (for instance, ctx is passed to a separate goroutine and we cannot control
// ctx lifetime in this goroutine), then the RequestHandler MUST call
// ctx.TimeoutError() before return.
type RequestCtx struct {
// Incoming request.
Request Request
// Outgoing response.
Response Response
id uint64
serveConnRequestNum uint64
serveConnTime time.Time
time time.Time
logger ctxLogger
s *Server
c net.Conn
fbr firstByteReader
timeoutErrMsg string
timeoutCh chan struct{}
timeoutTimer *time.Timer
v interface{}
}
type firstByteReader struct {
c net.Conn
ch byte
byteRead bool
}
func (r *firstByteReader) Read(b []byte) (int, error) {
if len(b) == 0 {
return 0, nil
}
nn := 0
if !r.byteRead {
b[0] = r.ch
b = b[1:]
r.byteRead = true
nn = 1
}
n, err := r.c.Read(b)
return n + nn, err
}
// Logger is used for logging formatted messages.
type Logger interface {
// Printf must have the same semantics as log.Printf.
Printf(format string, args ...interface{})
}
var ctxLoggerLock sync.Mutex
type ctxLogger struct {
ctx *RequestCtx
logger Logger
}
func (cl *ctxLogger) Printf(format string, args ...interface{}) {
ctxLoggerLock.Lock()
s := fmt.Sprintf(format, args...)
ctx := cl.ctx
req := &ctx.Request
cl.logger.Printf("%.3f #%016X - %s<->%s - %s %s - %s",
time.Since(ctx.Time()).Seconds(), ctx.ID(), ctx.LocalAddr(), ctx.RemoteAddr(), req.Header.Method(), ctx.URI().FullURI(), s)
ctxLoggerLock.Unlock()
}
var zeroTCPAddr = &net.TCPAddr{
IP: net.IPv4zero,
}
// ID returns unique ID of the request.
func (ctx *RequestCtx) ID() uint64 {
return ctx.id
}
// Time returns RequestHandler call time.
func (ctx *RequestCtx) Time() time.Time {
return ctx.time
}
// ServeConnTime returns the time server starts serving the connection
// the current request came from.
func (ctx *RequestCtx) ServeConnTime() time.Time {
return ctx.serveConnTime
}
// ServeConnRequestNum returns request sequence number
// for the current connection.
func (ctx *RequestCtx) ServeConnRequestNum() uint64 {
return ctx.serveConnRequestNum
}
// SetConnectionClose sets 'Connection: close' response header and closes
// connection after the RequestHandler returns.
func (ctx *RequestCtx) SetConnectionClose() {
ctx.Request.Header.SetConnectionClose()
}
// SetStatusCode sets response status code.
func (ctx *RequestCtx) SetStatusCode(statusCode int) {
ctx.Response.SetStatusCode(statusCode)
}
// SetContentType sets response Content-Type.
func (ctx *RequestCtx) SetContentType(contentType string) {
ctx.Response.Header.SetContentType(contentType)
}
// SetContentTypeBytes sets response Content-Type.
//
// It is safe modifying contentType buffer after function return.
func (ctx *RequestCtx) SetContentTypeBytes(contentType []byte) {
ctx.Response.Header.SetContentTypeBytes(contentType)
}
// RequestURI returns RequestURI.
//
// This uri is valid until returning from RequestHandler.
func (ctx *RequestCtx) RequestURI() []byte {
return ctx.Request.Header.RequestURI()
}
// URI returns requested uri.
func (ctx *RequestCtx) URI() *URI {
return ctx.Request.URI()
}
// Referer returns request referer.
//
// The referer is valid until returning from RequestHandler.
func (ctx *RequestCtx) Referer() []byte {
return ctx.Request.Header.Referer()
}
// Path returns requested path.
//
// The path is valid until returning from RequestHandler.
func (ctx *RequestCtx) Path() []byte {
return ctx.URI().Path
}
// Host returns requested host.
//
// The host is valid until returning from RequestHandler.
func (ctx *RequestCtx) Host() []byte {
return ctx.URI().Host
}
// QueryArgs returns query arguments from RequestURI.
//
// It doesn't return POST'ed arguments - use PostArge() for this.
//
// Returned arguments are valid until returning from RequestHandler.
func (ctx *RequestCtx) QueryArgs() *Args {
return ctx.URI().QueryArgs()
}
// PostArgs returns POST arguments.
//
// It doesn't return query arguments from RequestURI - use QueryArgs for this.
//
// Returned arguments are valid until returning from RequestHandler.
func (ctx *RequestCtx) PostArgs() *Args {
return ctx.Request.PostArgs()
}
// IsGet returns true if request method is GET.
func (ctx *RequestCtx) IsGet() bool {
return ctx.Request.Header.IsGet()
}
// IsPost returns true if request method is POST.
func (ctx *RequestCtx) IsPost() bool {
return ctx.Request.Header.IsPost()
}
// Method return request method.
//
// Returned value is valid until returning from RequestHandler.
func (ctx *RequestCtx) Method() []byte {
return ctx.Request.Header.Method()
}
// IsHead returns true if request method is HEAD.
func (ctx *RequestCtx) IsHead() bool {
return ctx.Request.Header.IsHead()
}
// RemoteAddr returns client address for the given request.
//
// Always returns non-nil result.
func (ctx *RequestCtx) RemoteAddr() net.Addr {
addr := ctx.c.RemoteAddr()
if addr == nil {
return zeroTCPAddr
}
return addr
}
// LocalAddr returns server address for the given request.
//
// Always returns non-nil result.
func (ctx *RequestCtx) LocalAddr() net.Addr {
addr := ctx.c.LocalAddr()
if addr == nil {
return zeroTCPAddr
}
return addr
}
// RemoteIP returns client ip for the given request.
//
// Always returns non-nil result.
func (ctx *RequestCtx) RemoteIP() net.IP {
x, ok := ctx.RemoteAddr().(*net.TCPAddr)
if !ok {
return net.IPv4zero
}
return x.IP
}
// Error sets response status code to the given value and sets response body
// to the given message.
//
// Error calls are ignored after TimeoutError call.
func (ctx *RequestCtx) Error(msg string, statusCode int) {
resp := &ctx.Response
resp.Reset()
resp.Header.StatusCode = statusCode
resp.Header.SetContentTypeBytes(defaultContentType)
resp.body = AppendBytesStr(resp.body[:0], msg)
}
// Success sets response Content-Type and body to the given values.
//
// It is safe modifying body buffer after the Success() call.
//
// Success calls are ignored after TimeoutError call.
func (ctx *RequestCtx) Success(contentType string, body []byte) {
ctx.SetContentType(contentType)
ctx.SetBody(body)
}
// SetBody sets response body to the given value.
//
// It is safe modifying body buffer after the function return.
func (ctx *RequestCtx) SetBody(body []byte) {
ctx.Response.SetBody(body)
}
// Write writes p into response body.
func (ctx *RequestCtx) Write(p []byte) (int, error) {
ctx.Response.body = append(ctx.Response.body, p...)
return len(p), nil
}
// PostBody returns POST request body.
//
// The returned value is valid until RequestHandler return.
func (ctx *RequestCtx) PostBody() []byte {
return ctx.Request.Body()
}
// SetBodyStream sets response body stream and, optionally body size.
//
// bodyStream.Close() will be called after finishing reading all body data
// if it implements io.Closer.
//
// If bodySize is >= 0, then bodySize bytes are read from bodyStream
// and used as response body.
//
// If bodySize < 0, then bodyStream is read until io.EOF.
func (ctx *RequestCtx) SetBodyStream(bodyStream io.Reader, bodySize int) {
ctx.Response.SetBodyStream(bodyStream, bodySize)
}
// Logger returns logger, which may be used for logging arbitrary
// request-specific messages inside RequestHandler.
//
// Each message logged via returned logger contains request-specific information
// such as request id, remote address, request method and request url.
//
// It is safe re-using returned logger for logging multiple messages.
func (ctx *RequestCtx) Logger() Logger {
if ctx.logger.ctx == nil {
ctx.logger.ctx = ctx
}
if ctx.logger.logger == nil {
ctx.logger.logger = ctx.s.logger()
}
return &ctx.logger
}
// TimeoutError sets response status code to StatusRequestTimeout and sets
// body to the given msg.
//
// All response modifications after TimeoutError call are ignored.
//
// TimeoutError MUST be called before returning from RequestHandler if there are
// references to ctx and/or its members in other goroutines.
func (ctx *RequestCtx) TimeoutError(msg string) {
ctx.timeoutErrMsg = msg
}
// ListenAndServe serves HTTP requests from the given TCP addr.
func (s *Server) ListenAndServe(addr string) error {
ln, err := net.Listen("tcp", addr)
if err != nil {
return err
}
return s.Serve(ln)
}
// ListenAndServeTLS serves HTTPS requests from the given TCP addr.
//
// certFile and keyFile are paths to TLS certificate and key files.
func (s *Server) ListenAndServeTLS(addr, certFile, keyFile string) error {
cert, err := tls.LoadX509KeyPair(certFile, keyFile)
if err != nil {
return err
}
tlsConfig := &tls.Config{
Certificates: []tls.Certificate{cert},
}
ln, err := tls.Listen("tcp", addr, tlsConfig)
if err != nil {
return err
}
return s.Serve(ln)
}
// Default maximum number of concurrent connections the Server may serve.
const DefaultConcurrency = 256 * 1024
// Serve serves incoming connections from the given listener.
//
// Serve may handle DefaultConcurrency concurrent connections.
// Use ServeConcurrency for handling another number of concurrent connections.
//
// Serve blocks until the given listener returns permanent error.
func (s *Server) Serve(ln net.Listener) error {
var lastOverflowErrorTime time.Time
var lastPerIPErrorTime time.Time
var c net.Conn
var err error
maxWorkersCount := s.getConcurrency()
wp := &workerPool{
WorkerFunc: s.serveConn,
MaxWorkersCount: maxWorkersCount,
Logger: s.logger(),
}
wp.Start()
for {
if c, err = acceptConn(s, ln, &lastPerIPErrorTime); err != nil {
wp.Stop()
if err == io.EOF {
return nil
}
return err
}
if !wp.Serve(c) {
c.Close()
if time.Since(lastOverflowErrorTime) > time.Minute {
s.logger().Printf("The incoming connection cannot be served, because %d concurrent connections are served. "+
"Try increasing Server.Concurrency", maxWorkersCount)
lastOverflowErrorTime = time.Now()
}
}
c = nil
}
}
func acceptConn(s *Server, ln net.Listener, lastPerIPErrorTime *time.Time) (net.Conn, error) {
for {
c, err := ln.Accept()
if err != nil {
if netErr, ok := err.(net.Error); ok && netErr.Temporary() {
s.logger().Printf("Temporary error when accepting new connections: %s", netErr)
time.Sleep(time.Second)
continue
}
if err != io.EOF && !strings.Contains(err.Error(), "use of closed network connection") {
s.logger().Printf("Permanent error when accepting new connections: %s", err)
return nil, err
}
return nil, io.EOF
}
if c == nil {
panic("BUG: net.Listener returned (nil, nil)")
}
if s.MaxConnsPerIP > 0 {
pic := wrapPerIPConn(s, c)
if pic == nil {
c.Close()
if time.Since(*lastPerIPErrorTime) > time.Minute {
s.logger().Printf("The number of connections from %s exceeds MaxConnsPerIP=%d",
getConnIP4(c), s.MaxConnsPerIP)
*lastPerIPErrorTime = time.Now()
}
continue
}
return pic, nil
}
return c, nil
}
}
func wrapPerIPConn(s *Server, c net.Conn) net.Conn {
ip := getUint32IP(c)
if ip == 0 {
return c
}
n := s.perIPConnCounter.Register(ip)
if n > s.MaxConnsPerIP {
s.perIPConnCounter.Unregister(ip)
return nil
}
return acquirePerIPConn(c, ip, &s.perIPConnCounter)
}
var defaultLogger = Logger(log.New(os.Stderr, "", log.LstdFlags))
func (s *Server) logger() Logger {
if s.Logger != nil {
return s.Logger
}
return defaultLogger
}
var (
// ErrPerIPConnLimit may be returned from ServeConn if the number of connections
// per ip exceeds Server.MaxConnsPerIP.
ErrPerIPConnLimit = errors.New("too many connections per ip")
// ErrConcurrencyLimit may be returned from ServeConn if the number
// of concurrenty served connections exceeds Server.Concurrency.
ErrConcurrencyLimit = errors.New("canot serve the connection because Server.Concurrency concurrent connections are served")
)
// ServeConn serves HTTP requests from the given connection.
//
// ServeConn returns nil if all requests from the c are successfully served.
// It returns non-nil error otherwise.
//
// Connection c must immediately propagate all the data passed to Write()
// to the client. Otherwise requests' processing may hang.
//
// ServeConn closes c before returning.
func (s *Server) ServeConn(c net.Conn) error {
if s.MaxConnsPerIP > 0 {
pic := wrapPerIPConn(s, c)
if pic == nil {
c.Close()
return ErrPerIPConnLimit
}
c = pic
}
n := atomic.AddUint32(&s.concurrency, 1)
if n > uint32(s.getConcurrency()) {
atomic.AddUint32(&s.concurrency, ^uint32(0))
c.Close()
return ErrConcurrencyLimit
}
err := s.serveConn(c)
atomic.AddUint32(&s.concurrency, ^uint32(0))
err1 := c.Close()
if err == nil {
err = err1
}
return err
}
func (s *Server) getConcurrency() int {
n := s.Concurrency
if n <= 0 {
n = DefaultConcurrency
}
return n
}
func (s *Server) serveConn(c net.Conn) error {
currentTime := time.Now()
ctx := s.acquireCtx(c)
ctx.serveConnRequestNum = 0
ctx.serveConnTime = currentTime
var br *bufio.Reader
var bw *bufio.Writer
var dt time.Duration
var prevReadTime time.Time
var err error
var connectionClose bool
var errMsg string
for {
ctx.id++
ctx.serveConnRequestNum++
ctx.time = currentTime
if s.ReadTimeout > 0 {
if err = c.SetReadDeadline(currentTime.Add(s.ReadTimeout)); err != nil {
break
}
}
if dt < time.Second || br != nil {
if br == nil {
br = acquireReader(ctx)
}
err = ctx.Request.Read(br)
if br.Buffered() == 0 || err != nil {
releaseReader(ctx, br)
br = nil
}
} else {
ctx, br, err = acquireByteReader(ctx)
if err == nil {
err = ctx.Request.Read(br)
if br.Buffered() == 0 || err != nil {
releaseReader(ctx, br)
br = nil
}
}
}
if err != nil {
if err == io.EOF {
err = nil
}
break
}
currentTime = time.Now()
dt = currentTime.Sub(prevReadTime)
prevReadTime = currentTime
ctx.time = currentTime
ctx.Response.Reset()
s.Handler(ctx)
errMsg = ctx.timeoutErrMsg
if len(errMsg) > 0 {
ctx = s.acquireCtx(c)
ctx.Error(errMsg, StatusRequestTimeout)
}
if s.WriteTimeout > 0 {
if err = c.SetWriteDeadline(time.Now().Add(s.WriteTimeout)); err != nil {
break
}
}
if bw == nil {
bw = acquireWriter(ctx)
}
if err = writeResponse(ctx, bw); err != nil {
break
}
if s.MaxRequestsPerConn > 0 && ctx.serveConnRequestNum >= uint64(s.MaxRequestsPerConn) {
connectionClose = true
} else {
connectionClose = ctx.Response.Header.ConnectionClose() || ctx.Request.Header.ConnectionClose()
}
if br == nil || connectionClose {
err = bw.Flush()
releaseWriter(ctx, bw)
bw = nil
if err != nil {
break
}
if connectionClose {
break
}
}
currentTime = time.Now()
}
if br != nil {
releaseReader(ctx, br)
}
if bw != nil {
releaseWriter(ctx, bw)
}
s.releaseCtx(ctx)
return err
}
// TimeoutErrMsg returns last error message set via TimeoutError call.
func (ctx *RequestCtx) TimeoutErrMsg() string {
return ctx.timeoutErrMsg
}
func writeResponse(ctx *RequestCtx, w *bufio.Writer) error {
if len(ctx.timeoutErrMsg) > 0 {
panic("BUG: cannot write timed out response")
}
h := &ctx.Response.Header
serverOld := h.Server()
if len(serverOld) == 0 {
h.server = ctx.s.getServerName()
}
err := ctx.Response.Write(w)
if len(serverOld) == 0 {
h.server = serverOld
}
return err
}
const (
defaultReadBufferSize = 4096
defaultWriteBufferSize = 4096
)
var bytePool sync.Pool
func acquireByteReader(ctx *RequestCtx) (*RequestCtx, *bufio.Reader, error) {
s := ctx.s
c := ctx.c
s.releaseCtx(ctx)
v := bytePool.Get()
if v == nil {
v = make([]byte, 1)
}
b := v.([]byte)
n, err := c.Read(b)
ch := b[0]
bytePool.Put(v)
ctx = s.acquireCtx(c)
if err != nil {
return ctx, nil, err
}
if n != 1 {
panic("BUG: Reader must return at least one byte")
}
ctx.fbr.c = c
ctx.fbr.ch = ch
ctx.fbr.byteRead = false
r := acquireReader(ctx)
r.Reset(&ctx.fbr)
return ctx, r, nil
}
func acquireReader(ctx *RequestCtx) *bufio.Reader {
v := ctx.s.readerPool.Get()
if v == nil {
n := ctx.s.ReadBufferSize
if n <= 0 {
n = defaultReadBufferSize
}
return bufio.NewReaderSize(ctx.c, n)
}
r := v.(*bufio.Reader)
r.Reset(ctx.c)
return r
}
func releaseReader(ctx *RequestCtx, r *bufio.Reader) {
r.Reset(nil)
ctx.s.readerPool.Put(r)
}
func acquireWriter(ctx *RequestCtx) *bufio.Writer {
v := ctx.s.writerPool.Get()
if v == nil {
n := ctx.s.WriteBufferSize
if n <= 0 {
n = defaultWriteBufferSize
}
return bufio.NewWriterSize(ctx.c, n)
}
w := v.(*bufio.Writer)
w.Reset(ctx.c)
return w
}
func releaseWriter(ctx *RequestCtx, w *bufio.Writer) {
w.Reset(nil)
ctx.s.writerPool.Put(w)
}
var globalCtxID uint64
func (s *Server) acquireCtx(c net.Conn) *RequestCtx {
v := s.ctxPool.Get()
var ctx *RequestCtx
if v == nil {
ctx = &RequestCtx{
s: s,
}
ctx.v = ctx
v = ctx
} else {
ctx = v.(*RequestCtx)
}
ctx.initID()
ctx.c = c
return ctx
}
// Init prepares ctx for passing to RequestHandler.
//
// remoteAddr and logger are optional. They are used by RequestCtx.Logger().
//
// This function is intended for custom Server implementations.
func (ctx *RequestCtx) Init(req *Request, remoteAddr net.Addr, logger Logger) {
if remoteAddr == nil {
remoteAddr = zeroTCPAddr
}
ctx.c = &fakeAddrer{
addr: remoteAddr,
}
if logger != nil {
ctx.logger.logger = logger
}
ctx.s = &fakeServer
ctx.initID()
req.CopyTo(&ctx.Request)
ctx.Response.Reset()
ctx.serveConnRequestNum = 0
ctx.serveConnTime = time.Now()
ctx.time = ctx.serveConnTime
}
var fakeServer Server
type fakeAddrer struct {
net.Conn
addr net.Addr
}
func (fa *fakeAddrer) RemoteAddr() net.Addr {
return fa.addr
}
func (fa *fakeAddrer) LocalAddr() net.Addr {
return fa.addr
}
func (fa *fakeAddrer) Read(p []byte) (int, error) {
panic("BUG: unexpected Read call")
}
func (fa *fakeAddrer) Write(p []byte) (int, error) {
panic("BUG: unexpected Write call")
}
func (fa *fakeAddrer) Close() error {
panic("BUG: unexpected Close call")
}
func (ctx *RequestCtx) initID() {
ctx.id = (atomic.AddUint64(&globalCtxID, 1)) << 32
}
func (s *Server) releaseCtx(ctx *RequestCtx) {
if len(ctx.timeoutErrMsg) > 0 {
panic("BUG: cannot release timed out RequestCtx")
}
ctx.c = nil
ctx.fbr.c = nil
s.ctxPool.Put(ctx.v)
}
func (s *Server) getServerName() []byte {
v := s.serverName.Load()
var serverName []byte
if v == nil {
serverName = []byte(s.Name)
if len(serverName) == 0 {
serverName = defaultServerName
}
s.serverName.Store(serverName)
} else {
serverName = v.([]byte)
}
return serverName
}