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main.go
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main.go
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package main
import (
"context"
"database/sql"
"encoding/gob"
"errors"
"fmt"
"io"
"log/slog"
"net/http"
"os"
"os/signal"
"syscall"
"time"
"github.com/google/uuid"
gorillaSess "github.com/gorilla/sessions"
"github.com/willemschots/househunt/assets"
"github.com/willemschots/househunt/internal"
"github.com/willemschots/househunt/internal/auth"
authdb "github.com/willemschots/househunt/internal/auth/db"
"github.com/willemschots/househunt/internal/db"
"github.com/willemschots/househunt/internal/db/migrate"
"github.com/willemschots/househunt/internal/email"
"github.com/willemschots/househunt/internal/email/postmark"
emailview "github.com/willemschots/househunt/internal/email/view"
"github.com/willemschots/househunt/internal/krypto"
"github.com/willemschots/househunt/internal/web"
"github.com/willemschots/househunt/internal/web/sessions"
"github.com/willemschots/househunt/internal/web/view"
"github.com/willemschots/househunt/migrations"
"golang.org/x/sync/errgroup"
)
func main() {
ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
defer stop()
os.Exit(run(ctx, os.Stderr))
}
func run(ctx context.Context, w io.Writer) int {
logger := slog.New(slog.NewTextHandler(w, nil))
logger = logger.With("revision", internal.BuildRevision, "revision_time", internal.BuildRevisionTime)
cfg, err := configFromEnv()
if err != nil {
logger.Error("failed to get config from environment", "error", err)
return 1
}
// Connect to the database.
dbh, err := connectDB(cfg)
if err != nil {
logger.Error("failed to connect to database", "error", err)
return 1
}
defer func() {
err := dbh.close()
if err != nil {
logger.Error("failed to close database handles", "error", err)
return
}
}()
// Run the migrations if desired.
if cfg.db.migrate {
ctx, cancel := context.WithTimeout(ctx, 60*time.Second)
defer cancel()
logger.Info("attempting to migrate database")
migrations, err := migrate.RunFS(ctx, dbh.write, migrations.FS, migrate.Metadata{
Revision: internal.BuildRevision,
RevisionTimestamp: internal.BuildRevisionTime,
})
if err != nil {
logger.Error("failed to run migrations", "error", err)
return 1
}
if len(migrations) == 0 {
logger.Info("no migrations ran")
} else {
for _, m := range migrations {
logger.Info("migration ran", "name", m.Filename, "sequence", m.Sequence)
}
}
}
// Create DB encryptor.
encryptor, err := krypto.NewEncryptor(cfg.db.encryptionKeys)
if err != nil {
logger.Error("failed to create encryptor", "error", err)
return 1
}
// Create emailer.
emailRenderer, err := emailview.NewMemRenderer(assets.EmailFS)
if err != nil {
logger.Error("failed to create email renderer", "error", err)
return 1
}
var sender email.Sender
switch cfg.email.driver {
case "log":
sender = email.NewLogSender(logger)
case "postmark":
httpClient := &http.Client{
Timeout: 10 * time.Second,
}
sender = postmark.NewSender(httpClient, cfg.email.postmark)
default:
logger.Error("unknown email driver", "driver", cfg.email.driver)
}
emailer := email.NewService(emailRenderer, sender, cfg.email.service)
// Create authentication store and service.
authStore := authdb.New(dbh.write, dbh.read, encryptor, cfg.db.blindIndexSalt)
authErrHandler := func(err error) {
logger.Error("authentication service error", "error", err)
}
authSvc, err := auth.NewService(authStore, emailer, authErrHandler, cfg.auth)
if err != nil {
logger.Error("failed to create auth service", "error", err)
return 1
}
// Create cookie store to store sessions.
keysAsBytes := make([][]byte, len(cfg.http.cookieKeys))
for i, key := range cfg.http.cookieKeys {
keysAsBytes[i] = key.SecretValue()
}
sessionStore := gorillaSess.NewCookieStore(keysAsBytes...)
sessionStore.Options.Secure = cfg.http.server.SecureCookie
sessionStore.Options.HttpOnly = true
sessionStore.MaxAge(7 * 24 * 60 * 60) // 1 week
// Register UUID type for inclusion in the session values.
gob.Register(uuid.UUID{})
var viewRenderer web.ViewRenderer
viewRenderer, err = view.NewMemRenderer(assets.TemplateFS)
if err != nil {
logger.Error("failed to create in memory view renderer", "error", err)
return 1
}
if cfg.http.viewDir != "" {
logger.Info("loading templates from disk", "dir", cfg.http.viewDir)
viewRenderer = view.NewFSRenderer(os.DirFS(cfg.http.viewDir))
}
serverDeps := &web.ServerDeps{
Logger: logger,
ViewRenderer: viewRenderer,
AuthService: authSvc,
SessionStore: sessions.NewStore(sessionStore),
DistFS: http.FS(assets.DistFS),
}
srv := &http.Server{
Addr: cfg.http.addr,
ReadTimeout: cfg.http.readTimeout,
WriteTimeout: cfg.http.writeTimeout,
IdleTimeout: cfg.http.idleTimeout,
Handler: web.NewServer(serverDeps, cfg.http.server),
}
// We need to run two tasks concurrently:
// - Listen and serving of the HTTP server.
// - Waiting for a signal to stop the server.
g, gCtx := errgroup.WithContext(ctx)
g.Go(func() error {
logger.Info("starting http server", "addr", cfg.http.addr)
// ListenAndServe always returns a non-nil error,
// g will cancel gCtx when an error is returned, so
// this will also stop the other goroutine.
return srv.ListenAndServe()
})
g.Go(func() error {
<-gCtx.Done()
logger.Info("stopping http server")
shutCtx, cancel := context.WithTimeout(context.Background(), cfg.http.shutdownTimeout)
defer cancel()
return srv.Shutdown(shutCtx)
})
err = g.Wait()
if err != nil && err != http.ErrServerClosed {
logger.Error("http server stopped with error", "error", err)
return 1
}
logger.Info("http server stopped successfully")
return 0
}
type dbHandles struct {
write *sql.DB
read *sql.DB
}
// connectDB connects to the database and returns the write and read handles.
func connectDB(cfg config) (*dbHandles, error) {
writeDB, err := db.OpenSQLite(cfg.db.file, true)
if err != nil {
return nil, fmt.Errorf("failed to open database write handle: %w", err)
}
readDB, err := db.OpenSQLite(cfg.db.file, false)
if err != nil {
closeErr := writeDB.Close()
if closeErr != nil {
err = errors.Join(err, closeErr)
}
return nil, fmt.Errorf("failed to open database read handle: %w", err)
}
handles := &dbHandles{write: writeDB, read: readDB}
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
err = handles.ping(ctx)
if err != nil {
closeErr := handles.close()
if closeErr != nil {
err = errors.Join(err, closeErr)
}
return nil, fmt.Errorf("failed to ping: %w", err)
}
return handles, nil
}
func (h *dbHandles) ping(ctx context.Context) error {
err := h.write.PingContext(ctx)
if err != nil {
return fmt.Errorf("failed to ping database write handle: %w", err)
}
err = h.read.PingContext(ctx)
if err != nil {
return fmt.Errorf("failed to ping database read handle: %w", err)
}
return nil
}
func (h *dbHandles) close() error {
err := h.write.Close()
if err != nil {
return fmt.Errorf("failed to close database write handle: %w", err)
}
err = h.read.Close()
if err != nil {
return fmt.Errorf("failed to close database read handle: %w", err)
}
return nil
}