/
main.go
144 lines (125 loc) · 3.74 KB
/
main.go
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// Copyright 2020 The Moov Authors
// Use of this source code is governed by an Apache License
// license that can be found in the LICENSE file.
package main
import (
"context"
"crypto/tls"
"flag"
"fmt"
"net/http"
"os"
"os/signal"
"strings"
"syscall"
"time"
"github.com/moov-io/base/admin"
moovhttp "github.com/moov-io/base/http"
"github.com/moov-io/base/http/bind"
"github.com/moov-io/imagecashletter"
"github.com/gorilla/mux"
"github.com/moov-io/base/log"
)
var (
httpAddr = flag.String("http.addr", bind.HTTP("ICL"), "HTTP listen address")
adminAddr = flag.String("admin.addr", bind.Admin("ICL"), "Admin HTTP listen address")
flagLogFormat = flag.String("log.format", "", "Format for log lines (Options: json, plain")
)
func main() {
flag.Parse()
var logger log.Logger
if strings.ToLower(*flagLogFormat) == "json" {
logger = log.NewJSONLogger()
} else {
logger = log.NewDefaultLogger()
}
logger = logger.Set("package", log.String("main"))
logger.Logf("Starting moov-io/imagecashletter server version %s", imagecashletter.Version)
// Channel for errors
errs := make(chan error)
go func() {
c := make(chan os.Signal, 1)
signal.Notify(c, syscall.SIGINT, syscall.SIGTERM)
errs <- fmt.Errorf("%s", <-c)
}()
// Start Admin server (with Prometheus metrics)
adminServer := admin.NewServer(*adminAddr)
adminServer.AddVersionHandler(imagecashletter.Version) // Setup 'GET /version'
go func() {
logger.Logf("admin server listening on %s", adminServer.BindAddr())
if err := adminServer.Listen(); err != nil {
if err == http.ErrServerClosed {
logger.Log("admin server closed")
return
}
err = logger.LogErrorf("problem starting admin http: %v", err).Err()
errs <- err
}
}()
defer adminServer.Shutdown()
repo := &memoryICLFileRepository{
files: make(map[string]*imagecashletter.File),
}
// Setup business HTTP routes
router := mux.NewRouter()
moovhttp.AddCORSHandler(router)
addPingRoute(router)
addFileRoutes(logger, router, repo)
// Start business HTTP server
readTimeout, _ := time.ParseDuration("30s")
writTimeout, _ := time.ParseDuration("30s")
idleTimeout, _ := time.ParseDuration("60s")
serve := &http.Server{
Addr: *httpAddr,
Handler: router,
TLSConfig: &tls.Config{
InsecureSkipVerify: false,
PreferServerCipherSuites: true,
MinVersion: tls.VersionTLS12,
},
ReadTimeout: readTimeout,
ReadHeaderTimeout: readTimeout,
WriteTimeout: writTimeout,
IdleTimeout: idleTimeout,
}
shutdownServer := func() {
if err := serve.Shutdown(context.TODO()); err != nil {
logger.LogErrorf("shutdown error: %v", err)
}
}
// Start business logic HTTP server
go func() {
if certFile, keyFile := os.Getenv("HTTPS_CERT_FILE"), os.Getenv("HTTPS_KEY_FILE"); certFile != "" && keyFile != "" {
logger.Logf("binding to %s for secure HTTP server", *httpAddr)
if err := serve.ListenAndServeTLS(certFile, keyFile); err != nil {
if err == http.ErrServerClosed {
logger.Log("secure http server closed")
return
}
logger.LogErrorf("http server error: %v", err)
}
} else {
logger.Logf("binding to %s for HTTP server", *httpAddr)
if err := serve.ListenAndServe(); err != nil {
if err == http.ErrServerClosed {
logger.Log("http server closed")
return
}
logger.LogErrorf("http server error: %v", err)
}
}
}()
// Block/Wait for an error
if err := <-errs; err != nil {
logger.LogError(err)
shutdownServer()
}
}
func addPingRoute(r *mux.Router) {
r.Methods("GET").Path("/ping").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
moovhttp.SetAccessControlAllowHeaders(w, r.Header.Get("Origin"))
w.Header().Set("Content-Type", "text/plain")
w.WriteHeader(http.StatusOK)
w.Write([]byte("PONG"))
})
}