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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"
"searchix/internal/options"
"searchix/internal/search"
"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
Query string
Results bool
}
type ResultData[T options.NixOption] struct {
TemplateData
Query string
Results *search.Result[T]
}
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 init() {
err := search.Index()
if err != nil {
log.Fatalf("could not build search index, error: %#v", err)
}
}
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,
})
templates, err := loadTemplates()
if err != nil {
log.Panicf("could not load templates: %v", err)
}
top := http.NewServeMux()
mux := http.NewServeMux()
indexData := TemplateData{
LiveReload: jsSnippet,
}
mux.HandleFunc("/{$}", func(w http.ResponseWriter, _ *http.Request) {
err := templates["index"].ExecuteTemplate(w, "index.gotmpl", indexData)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
}
})
mux.HandleFunc("/search/{source}", func(w http.ResponseWriter, r *http.Request) {
log.Println(r.PathValue("source"))
err := templates["search"].Execute(w, indexData)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
}
})
timeout := 1 * time.Second
mux.HandleFunc("/options/results", func(w http.ResponseWriter, r *http.Request) {
ctx, cancel := context.WithTimeoutCause(r.Context(), timeout, errors.New("timeout"))
defer cancel()
results, err := search.Search(ctx, r.URL.Query().Get("query"))
if err != nil {
if err == context.DeadlineExceeded {
http.Error(w, "Search timed out", http.StatusInternalServerError)
return
}
slog.Error("search error", "error", err)
http.Error(w, err.Error(), http.StatusInternalServerError)
}
tdata := ResultData[options.NixOption]{
TemplateData: indexData,
Query: r.URL.Query().Get("query"),
Results: results,
}
if r.Header.Get("Fetch") == "true" {
w.Header().Add("Content-Type", "text/html; charset=utf-8")
err = templates["options"].ExecuteTemplate(w, "options.gotmpl", tdata)
} else {
err = templates["options"].ExecuteTemplate(w, "index.gotmpl", tdata)
}
if err != nil {
slog.Error("template error", "template", "options", "error", err)
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(path.Join("frontend"))
if err != nil {
return nil, errors.WithMessage(err, "could not add directory to file watcher")
}
go fw.Start(func(filename string) {
slog.Debug(fmt.Sprintf("got filename %s", filename))
if path.Ext(filename) == ".gotmpl" {
templates, err = loadTemplates()
if err != nil {
slog.Error(fmt.Sprintf("could not reload templates: %v", err))
}
}
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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