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serve.go
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serve.go
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package proxy
import (
"context"
"crypto/tls"
"net"
"net/http"
"sync"
"time"
"github.com/fabiolb/fabio/config"
"github.com/fabiolb/fabio/proxy/tcp"
)
type Server interface {
Close() error
Serve(l net.Listener) error
Shutdown(ctx context.Context) error
}
var (
// mu guards servers which contains the list
// of running proxy servers.
mu sync.Mutex
servers []Server
)
func Close() {
mu.Lock()
for _, srv := range servers {
srv.Close()
}
servers = []Server{}
mu.Unlock()
}
func Shutdown(timeout time.Duration) {
mu.Lock()
srvs := make([]Server, len(servers))
copy(srvs, servers)
servers = []Server{}
mu.Unlock()
var wg sync.WaitGroup
for _, srv := range srvs {
wg.Add(1)
go func(srv Server) {
defer wg.Done()
ctx, cancel := context.WithTimeout(context.Background(), timeout)
defer cancel()
srv.Shutdown(ctx)
}(srv)
}
wg.Wait()
}
func ListenAndServeHTTP(l config.Listen, h http.Handler, cfg *tls.Config) error {
ln, err := ListenTCP(l.Addr, cfg)
if err != nil {
return err
}
srv := &http.Server{
Addr: l.Addr,
Handler: h,
ReadTimeout: l.ReadTimeout,
WriteTimeout: l.WriteTimeout,
TLSConfig: cfg,
}
return serve(ln, srv)
}
func ListenAndServeTCP(l config.Listen, h tcp.Handler, cfg *tls.Config) error {
ln, err := ListenTCP(l.Addr, cfg)
if err != nil {
return err
}
srv := &tcp.Server{
Addr: l.Addr,
Handler: h,
ReadTimeout: l.ReadTimeout,
WriteTimeout: l.WriteTimeout,
}
return serve(ln, srv)
}
func serve(ln net.Listener, srv Server) error {
mu.Lock()
servers = append(servers, srv)
mu.Unlock()
return srv.Serve(ln)
}