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senk.go
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senk.go
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package main
import (
"context"
"log"
"net/http"
"os"
"os/signal"
"time"
"github.com/go-chi/chi/v5"
"github.com/go-chi/chi/v5/middleware"
)
func main() {
// Load configuration and database
dbPath := os.Getenv("SENK_DIR")
if dbPath == "" {
log.Fatalf("Environment variable SENK_DIR must point to the data directory.")
}
err := os.MkdirAll(dbPath, 0700)
if err != nil {
log.Fatalf("Failed to initialize data directory: %v", err)
}
db, err := LoadDatabase(dbPath)
if err != nil {
log.Fatalf("Failed to load database: %v", err)
}
addr := os.Getenv("SENK_ADDR")
if addr == "" {
addr = ":3000"
log.Printf("Use the SENK_ADDR environment variable to set the address for the server to listen on. Using the default value: %s", addr)
}
// Background tasks
ticker := time.NewTicker(time.Minute)
go func() {
for range ticker.C {
err := db.Save()
if err != nil {
log.Printf("Failed to periodically save database.")
}
}
}()
db.StartStorageWorker()
// TODO: for testing:
log.Println(db.Users.AddUser("teus2", "VeryStrongP@ssword123Wtf#"))
// Routes
r := chi.NewRouter()
r.Use(middleware.Logger)
r.Use(db.Sessions.SessionRetrievalMiddleware)
r.Post("/session/signin", db.signIn)
r.Post("/session/signout", db.signOut)
r.Get("/", db.serveMain)
r.Get("/app.js", serveStatic("app.js", "text/javascript"))
r.Get("/style.css", serveStatic("style.css", "text/css"))
r.Route("/api", func(r chi.Router) {
r.Get("/index", db.getIndex)
r.Get("/index/{user:~[a-z][a-z0-9_-]+}", db.getIndex)
r.Get("/trash", db.getTrash)
r.Post("/new", db.createNote)
})
r.Route("/trash", func(r chi.Router) {
r.Get("/", db.serveMain)
r.Get("/{user:~[a-z][a-z0-9_-]+}/{id}", db.serveMain)
r.Get("/{user:~[a-z][a-z0-9_-]+}/{id}/raw", db.readTrashNote)
})
r.Route("/{user:~[a-z][a-z0-9_-]+}", func(r chi.Router) {
r.Get("/", db.serveMain) // TODO: for anonymous users
r.Route("/{id}", func(r chi.Router) {
r.Get("/raw", db.readNote)
r.Get("/", db.serveMain) // TODO: for anonymous users
r.Put("/", db.writeNote)
r.Delete("/", db.deleteNote)
})
})
// Server
server := http.Server{
Addr: addr,
Handler: r,
}
// Cleanup
cleanup := func() {
log.Printf("Cleaning up...")
ticker.Stop()
_ = db.Save()
}
closed := make(chan struct{})
go func() {
sigint := make(chan os.Signal, 1)
signal.Notify(sigint, os.Interrupt)
<-sigint
log.Printf("Process interrupted, shutting down the server.")
ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
defer cancel()
if err := server.Shutdown(ctx); err != nil {
log.Printf("Error when shutting down the server: %v", err)
}
cleanup()
close(closed)
}()
// Serving
log.Printf("Starting the server.")
if err = server.ListenAndServe(); err != http.ErrServerClosed {
cleanup()
log.Fatalf("Failed to ListenAndServer: %v", err)
}
<-closed
log.Printf("Finished cleaning up.")
}