111 lines
2.8 KiB
Go
111 lines
2.8 KiB
Go
package main
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import (
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"expvar"
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"flag"
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"fmt"
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"os"
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"runtime"
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"strings"
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"sync"
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"time"
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_ "github.com/lib/pq"
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"greenlight.alexedwards.net/internal/data"
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"greenlight.alexedwards.net/internal/jsonlog"
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"greenlight.alexedwards.net/internal/vcs"
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)
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var (
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version = vcs.Version()
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)
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type config struct {
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port int
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env string
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db struct {
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dsn string
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maxOpenConns int
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maxIdleConns int
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maxIdleTime string
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}
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limiter struct {
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rps float64
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burst int
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enabled bool
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}
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smtp struct {
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host string
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port int
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username string
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password string
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sender string
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}
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cors struct {
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trustedOrigins []string
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}
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}
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type application struct {
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config config
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logger *jsonlog.Logger
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models data.Models
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wg sync.WaitGroup
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}
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func main() {
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var cfg config
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flag.IntVar(&cfg.port, "port", 4000, "API server port")
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flag.StringVar(&cfg.env, "env", "development", "Environment (development|staging|production)")
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flag.StringVar(&cfg.db.dsn, "db-dsn", "", "PostgresSQL DSN")
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flag.IntVar(&cfg.db.maxOpenConns, "db-max-open-conns", 25, "PostgreSQL max open connections")
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flag.IntVar(&cfg.db.maxIdleConns, "db-max-idle-conns", 25, "PostgreSQL max idle connections")
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flag.StringVar(&cfg.db.maxIdleTime, "db-max-idle-time", "15m", "PostgreSQL max idle time")
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flag.Float64Var(&cfg.limiter.rps, "limiter-rps", 2, "Rate limiter maximum requests per second")
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flag.IntVar(&cfg.limiter.burst, "limiter-burst", 4, "Rate limiter maximum burst")
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flag.BoolVar(&cfg.limiter.enabled, "limiter-enabled", true, "Enable rate limiter")
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flag.StringVar(&cfg.smtp.host, "smtp-host", "smtp.mailtrap.io", "SMTP server host")
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flag.IntVar(&cfg.smtp.port, "smtp-port", 25, "SMTP server port")
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flag.StringVar(&cfg.smtp.username, "smtp-username", "ebe83d2e524f7d", "SMTP server username")
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flag.StringVar(&cfg.smtp.password, "smtp-password", "2a46c462463a5f", "SMTP server password")
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flag.StringVar(&cfg.smtp.sender, "smtp-sender", "Greenlight <no-reply@greenlight.alexedwards.not>", "SMTP sender email address")
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flag.Func("cors-trusted-origins", "Trusted CORS origins (space separated)", func(val string) error {
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cfg.cors.trustedOrigins = strings.Fields(val)
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return nil
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})
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displayVersion := flag.Bool("version", false, "Display version and exit")
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flag.Parse()
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if *displayVersion {
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fmt.Printf("Version: \t%s\n", version)
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os.Exit(0)
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}
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logger := jsonlog.New(os.Stdout, jsonlog.LevelInfo)
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logger.PrintInfo("database connection pool established", nil)
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expvar.NewString("version").Set(version)
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expvar.Publish("goroutines", expvar.Func(func() any {
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return runtime.NumGoroutine()
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}))
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expvar.Publish("timestamp", expvar.Func(func() any {
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return time.Now().Unix()
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}))
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app := &application{
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config: cfg,
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logger: logger,
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}
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err := app.serve()
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if err != nil {
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logger.PrintFatal(err, nil)
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}
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}
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