/
http_server.go
114 lines (97 loc) · 3.2 KB
/
http_server.go
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// Copyright (c) 2021 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package zanzibar
import (
"net"
"net/http"
"strconv"
"sync"
"time"
"go.uber.org/zap"
)
// HTTPServer like, http.Server but improved management of listening and serving
// Allows you to listen on port 0, query for real OS port and then serve requests
type HTTPServer struct {
*http.Server
Logger *zap.Logger
listeningSocket net.Listener
closing bool
RealPort int32
RealIP string
RealAddr string
}
// JustListen will only listen on port and query real addr
func (server *HTTPServer) JustListen() (net.Listener, error) {
addr := server.Addr
if addr == "" {
/* coverage ignore next line */
addr = ":http"
}
ln, err := net.Listen("tcp", addr)
if err != nil {
return nil, err
}
server.listeningSocket = ln
realAddr := ln.Addr().(*net.TCPAddr)
server.RealPort = int32(realAddr.Port)
server.RealIP = realAddr.IP.String()
server.RealAddr = realAddr.IP.String() + ":" +
strconv.Itoa(int(server.RealPort))
return ln, nil
}
// JustServe will serve all incoming requests
func (server *HTTPServer) JustServe(waitGroup *sync.WaitGroup) {
ln := server.listeningSocket.(*net.TCPListener)
err := server.Serve(tcpKeepAliveListener{ln})
if err != nil && !server.closing {
/* coverage ignore next line */
server.Logger.Error("Error http serving", zap.Error(err))
}
waitGroup.Done()
}
// Close the listening socket
func (server *HTTPServer) Close() {
server.closing = true
if server.listeningSocket == nil {
/* coverage ignore next line */
return
}
err := server.listeningSocket.Close()
if err != nil {
/* coverage ignore next line */
server.Logger.Error("Error closing listening socket", zap.Error(err))
}
}
// tcpKeepAliveListener sets TCP keep-alive timeouts on accepted
// connections. It's used by ListenAndServe and ListenAndServeTLS so
// dead TCP connections (e.g. closing laptop mid-download) eventually
// go away.
type tcpKeepAliveListener struct {
*net.TCPListener
}
func (ln tcpKeepAliveListener) Accept() (c net.Conn, err error) {
tc, err := ln.AcceptTCP()
if err != nil {
return
}
_ = tc.SetKeepAlive(true)
_ = tc.SetKeepAlivePeriod(3 * time.Minute)
return tc, nil
}