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package server
import (
"context"
"fmt"
"html/template"
"io"
"log"
"log/slog"
"net"
"net/http"
"os"
"path"
"slices"
"time"
cfg "searchix/internal/config"
"github.com/getsentry/sentry-go"
sentryhttp "github.com/getsentry/sentry-go/http"
"github.com/osdevisnot/sorvor/pkg/livereload"
"github.com/pkg/errors"
"github.com/shengyanli1982/law"
)
var config *cfg.Config
var (
CommitSHA string
ShortSHA string
)
type Config struct {
Production bool `conf:"default:false"`
InDevServer bool `conf:"default:false"`
LiveReload bool `conf:"default:false,flag:live"`
Root string `conf:"default:website"`
ListenAddress string `conf:"default:localhost"`
Port string `conf:"default:3000,short:p"`
BaseURL cfg.URL `conf:"default:http://localhost:3000,short:b"`
}
type HTTPError struct {
Error error
Message string
Code int
}
type Server struct {
*http.Server
}
const jsSnippet = template.HTML(livereload.JsSnippet) // #nosec G203
type TemplateData struct {
LiveReload template.HTML
Data map[string]interface{}
}
func applyDevModeOverrides(config *cfg.Config) {
config.CSP.ScriptSrc = slices.Insert(config.CSP.ScriptSrc, 0, "'unsafe-inline'")
config.CSP.ConnectSrc = slices.Insert(config.CSP.ConnectSrc, 0, "'self'")
}
func New(runtimeConfig *Config) (*Server, error) {
var err error
config, err = cfg.GetConfig()
if err != nil {
return nil, errors.WithMessage(err, "error parsing configuration file")
}
env := "development"
if runtimeConfig.Production {
env = "production"
}
err = sentry.Init(sentry.ClientOptions{
EnableTracing: true,
TracesSampleRate: 1.0,
Dsn: os.Getenv("SENTRY_DSN"),
Release: CommitSHA,
Environment: env,
})
if err != nil {
return nil, errors.WithMessage(err, "could not set up sentry")
}
defer sentry.Flush(2 * time.Second)
sentryHandler := sentryhttp.New(sentryhttp.Options{
Repanic: true,
})
templatePaths := path.Join("frontend", "templates", "*.tmpl")
tpl := template.Must(template.ParseGlob(templatePaths))
top := http.NewServeMux()
mux := http.NewServeMux()
mux.HandleFunc("/", func(w http.ResponseWriter, _ *http.Request) {
tdata := TemplateData{
LiveReload: jsSnippet,
Data: make(map[string]interface{}),
}
err := tpl.Execute(w, tdata)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
}
})
mux.Handle("/static/", http.StripPrefix("/static/", http.FileServer(http.Dir("frontend/static"))))
if runtimeConfig.LiveReload {
applyDevModeOverrides(config)
liveReload := livereload.New()
liveReload.Start()
top.Handle("/livereload", liveReload)
fw, err := NewFileWatcher()
if err != nil {
return nil, errors.WithMessage(err, "could not create file watcher")
}
err = fw.AddRecursive("frontend")
if err != nil {
return nil, errors.WithMessage(err, "could not add directory to file watcher")
}
go fw.Start(func() {
t, err := template.ParseGlob(path.Join("frontend", "templates", "*.tmpl"))
if err != nil {
slog.Error(fmt.Sprintf("could not parse template: %v", err))
} else {
tpl = t
liveReload.Reload()
}
})
}
var logWriter io.Writer
if runtimeConfig.Production {
logWriter = law.NewWriteAsyncer(os.Stdout, nil)
} else {
logWriter = os.Stdout
}
top.Handle("/",
AddHeadersMiddleware(
sentryHandler.Handle(
wrapHandlerWithLogging(mux, wrappedHandlerOptions{
defaultHostname: runtimeConfig.BaseURL.Hostname(),
logger: logWriter,
}),
),
config,
),
)
// no logging, no sentry
top.HandleFunc("/health", func(w http.ResponseWriter, _ *http.Request) {
w.WriteHeader(http.StatusOK)
})
listenAddress := net.JoinHostPort(runtimeConfig.ListenAddress, runtimeConfig.Port)
return &Server{
&http.Server{
Addr: listenAddress,
Handler: top,
ReadHeaderTimeout: 20 * time.Second,
},
}, nil
}
func (s *Server) Start() error {
if err := s.ListenAndServe(); err != http.ErrServerClosed {
return errors.WithMessage(err, "could not start server")
}
return nil
}
func (s *Server) Stop() chan struct{} {
slog.Debug("stop called")
idleConnsClosed := make(chan struct{})
go func() {
slog.Debug("shutting down server")
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
err := s.Server.Shutdown(ctx)
slog.Debug("server shut down")
if err != nil {
// Error from closing listeners, or context timeout:
log.Printf("HTTP server Shutdown: %v", err)
}
close(idleConnsClosed)
}()
return idleConnsClosed
}
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