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package server
import (
"fmt"
"net"
"net/http"
"go.uber.org/zap"
)
// HTTPServer extends net/http Server with graceful
// shutdowns.
type HTTPServer struct {
*http.Server
listener net.Listener
isRunning bool
running chan error
logger *zap.SugaredLogger
}
// NewHTTPServer creates a new HTTPServer instance.
func NewHTTPServer(logger *zap.SugaredLogger) *HTTPServer {
return &HTTPServer{
Server: &http.Server{},
running: make(chan error),
logger: logger,
isRunning: true,
}
}
// Run starts HTTPServer instance and listens on specified addr.
func (h *HTTPServer) Run(addr string, handler http.Handler) error {
listener, err := net.Listen("tcp", addr)
if err != nil {
return err
}
h.Handler = handler
h.listener = listener
h.logger.Infof("starting HTTP server on %s", addr)
go h.closeWith(h.Serve(listener))
return nil
}
// Close closes the HTTPServer instance
func (h *HTTPServer) Close() error {
h.closeWith(nil)
return h.listener.Close()
}
// Wait waits for server to be stopped
func (h *HTTPServer) Wait() error {
if !h.isRunning {
return fmt.Errorf("already closed")
}
return <-h.running
}
func (h *HTTPServer) closeWith(err error) {
if !h.isRunning {
return
}
h.isRunning = false
h.running <- err
}
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