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server.go
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server.go
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package api
import (
"context"
"log"
"net/http"
"os"
"os/signal"
"strings"
"github.com/spf13/viper"
)
// Server provides an http.Server.
type Server struct {
*http.Server
}
// NewServer creates and configures an APIServer serving all application routes.
func NewServer() (*Server, error) {
log.Println("configuring server...")
api, err := NewAPI()
if err != nil {
return nil, err
}
var addr string
port := viper.GetString("port")
// allow port to be set as localhost:3000 in env during development to avoid "accept incoming network connection" request on restarts
if strings.Contains(port, ":") {
addr = port
} else {
addr = ":" + port
}
srv := http.Server{
Addr: addr,
Handler: api,
}
return &Server{&srv}, nil
}
// Start runs ListenAndServe on the http.Server with graceful shutdown.
func (srv *Server) Start() {
log.Println("starting server...")
go func() {
if err := srv.ListenAndServe(); err != http.ErrServerClosed {
panic(err)
}
}()
log.Printf("Listening on %s\n", srv.Addr)
quit := make(chan os.Signal)
signal.Notify(quit, os.Interrupt)
sig := <-quit
log.Println("Shutting down server... Reason:", sig)
// teardown logic...
if err := srv.Shutdown(context.Background()); err != nil {
panic(err)
}
log.Println("Server gracefully stopped")
}