local-ip.sh/http/server.go

205 lines
5.7 KiB
Go

package http
import (
"context"
"crypto/tls"
"fmt"
"net"
"net/http"
"os"
"strconv"
"strings"
"time"
"github.com/urfave/negroni"
"local-ip.sh/utils"
)
var flyRegion = os.Getenv("FLY_REGION")
func loggingMiddleware(w http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
start := time.Now()
next(w, r)
response := w.(negroni.ResponseWriter)
logEvent := utils.Logger.Debug()
if flyRegion != "" {
logEvent.Str("FLY_REGION", flyRegion)
}
logEvent.Msgf("%s %s %d %s", r.Method, r.URL.Path, response.Status(), time.Since(start))
}
func newHttpMux() http.Handler {
mux := http.NewServeMux()
mux.HandleFunc("GET /server.key", func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/octet-stream")
http.ServeFile(w, r, "./.lego/certs/wildcard/server.key")
})
mux.HandleFunc("GET /server.pem", func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/x-x509-ca-cert")
http.ServeFile(w, r, "./.lego/certs/wildcard/server.pem")
})
mux.HandleFunc("GET /og.png", func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "image/png; charset=utf-8")
w.Header().Set("Cache-Control", "public, max-age=3600")
http.ServeFile(w, r, "./http/static/og.png")
})
mux.HandleFunc("GET /favicon.ico", func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "image/x-icon; charset=utf-8")
w.Header().Set("Cache-Control", "public, max-age=3600")
http.ServeFile(w, r, "./http/static/favicon.ico")
})
mux.HandleFunc("GET /styles.css", func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "text/css; charset=utf-8")
http.ServeFile(w, r, "./http/static/styles.css")
})
mux.HandleFunc("GET /", func(w http.ResponseWriter, r *http.Request) {
if r.URL.Path != "/" {
http.Error(w, "Not Found", http.StatusNotFound)
return
}
w.Header().Set("Content-Type", "text/html; charset=utf-8")
http.ServeFile(w, r, "./http/static/index.html")
})
n := negroni.New(negroni.HandlerFunc(loggingMiddleware))
n.UseHandler(mux)
return n
}
func serveHttp() *http.Server {
config := utils.GetConfig()
httpServer := &http.Server{
Addr: fmt.Sprintf(":%d", config.HttpPort),
Handler: newHttpMux(),
}
utils.Logger.Info().Str("http_address", httpServer.Addr).Msg("Starting up HTTP server")
go func() {
err := httpServer.ListenAndServe()
if err != http.ErrServerClosed {
utils.Logger.Fatal().Err(err).Msg("Unexpected error received from HTTP server")
}
}()
return httpServer
}
func waitForCertificate(ready chan bool) {
for {
_, err := os.Stat("./.lego/certs/root/output.json")
if err != nil {
if strings.Contains(err.Error(), "no such file or directory") {
time.Sleep(1 * time.Second)
continue
}
utils.Logger.Fatal().Err(err).Msg("Unexpected error while looking for ./.lego/certs/root/output.json")
}
break
}
ready <- true
}
func killServer(httpServer *http.Server) {
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
err := httpServer.Shutdown(ctx)
if err != nil {
utils.Logger.Fatal().Err(err).Msg("Unexpected error when shutting down HTTP server")
}
utils.Logger.Debug().Msg("HTTP server shut down correctly")
}
func redirectHttpToHttps() {
config := utils.GetConfig()
httpServer := &http.Server{
Addr: fmt.Sprintf(":%d", config.HttpPort),
Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
url := r.URL
host := r.Host
// Strip the port from the host if present
if strings.Contains(host, ":") {
hostWithoutPort, _, err := net.SplitHostPort(host)
if err != nil {
utils.Logger.Error().Err(err).Msg("Failed to split host and port")
} else {
host = hostWithoutPort
}
}
// Add the HTTPS port only if it's not 443
if config.HttpsPort != 443 {
host = net.JoinHostPort(host, strconv.FormatUint(uint64(config.HttpsPort), 10))
}
url.Host = host
url.Scheme = "https"
http.Redirect(w, r, url.String(), http.StatusMovedPermanently)
}),
}
utils.Logger.Info().Str("http_address", httpServer.Addr).Msg("Redirecting HTTP traffic to HTTPS")
go httpServer.ListenAndServe()
}
type CertificateReloader struct {
CertificateFilePath string
KeyFilePath string
certificate *tls.Certificate
lastUpdatedAt time.Time
}
func (cr *CertificateReloader) GetCertificate(*tls.ClientHelloInfo) (*tls.Certificate, error) {
stat, err := os.Stat(cr.KeyFilePath)
if err != nil {
return nil, fmt.Errorf("failed checking key file modification time: %w", err)
}
if cr.certificate == nil || stat.ModTime().After(cr.lastUpdatedAt) {
pair, err := tls.LoadX509KeyPair(cr.CertificateFilePath, cr.KeyFilePath)
if err != nil {
return nil, fmt.Errorf("failed loading tls key pair: %w", err)
}
cr.certificate = &pair
cr.lastUpdatedAt = stat.ModTime()
}
return cr.certificate, nil
}
var certificateReloader = &CertificateReloader{
CertificateFilePath: "./.lego/certs/root/server.pem",
KeyFilePath: "./.lego/certs/root/server.key",
}
func serveHttps() {
config := utils.GetConfig()
mux := newHttpMux()
httpsServer := &http.Server{
Addr: fmt.Sprintf(":%d", config.HttpsPort),
Handler: mux,
TLSConfig: &tls.Config{GetCertificate: certificateReloader.GetCertificate},
}
utils.Logger.Info().Str("https_address", httpsServer.Addr).Msg("Starting up HTTPS server")
go func() {
err := httpsServer.ListenAndServeTLS("", "")
if err != http.ErrServerClosed {
utils.Logger.Fatal().Err(err).Msg("Unexpected error received from HTTPS server")
}
}()
}
func ServeHttp() {
httpServer := serveHttp()
ready := make(chan bool, 1)
go waitForCertificate(ready)
<-ready
killServer(httpServer)
serveHttps()
redirectHttpToHttps()
}