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package main
import (
"embed"
"errors"
"fmt"
"io"
"log"
"net/http"
"os"
"time"
cfg "website/internal/config"
"github.com/ansrivas/fiberprometheus/v2"
"github.com/ardanlabs/conf/v3"
"github.com/getsentry/sentry-go"
"github.com/gofiber/contrib/fibersentry"
"github.com/gofiber/fiber/v2"
"github.com/gofiber/fiber/v2/middleware/cache"
"github.com/gofiber/fiber/v2/middleware/compress"
"github.com/gofiber/fiber/v2/middleware/etag"
"github.com/gofiber/fiber/v2/middleware/filesystem"
"github.com/gofiber/fiber/v2/middleware/healthcheck"
"github.com/gofiber/fiber/v2/middleware/logger"
"github.com/gofiber/fiber/v2/middleware/recover"
"github.com/gofiber/fiber/v2/middleware/skip"
"github.com/shengyanli1982/law"
)
type Config struct {
Production bool `conf:"default:false"`
Port uint16 `conf:"default:3000,short:p"`
BaseURL cfg.URL `conf:"default:http://localhost:3000,short:b"`
RedirectOtherHostnames bool `conf:"default:false"`
}
// TODO purge CSS
// TODO HTTP2 https://github.com/dgrr/http2
type Host struct {
Fiber *fiber.App
}
//go:embed all:public/*
var fs embed.FS
func main() {
config := Config{}
if help, err := conf.Parse("", &config); err != nil {
if errors.Is(err, conf.ErrHelpWanted) {
fmt.Println(help)
os.Exit(1)
}
log.Panicf("parsing config: %v", err)
}
err := sentry.Init(sentry.ClientOptions{
Dsn: os.Getenv("SENTRY_DSN"),
Release: os.Getenv("FLY_MACHINE_VERSION"),
Environment: os.Getenv("ENV"),
})
if err != nil {
log.Panic("could not set up sentry")
}
defer sentry.Flush(2 * time.Second)
metricServer := fiber.New(fiber.Config{
GETOnly: true,
StrictRouting: true,
DisableDefaultDate: true,
DisableHeaderNormalizing: true,
DisableStartupMessage: true,
})
prometheus := fiberprometheus.New("homestead")
prometheus.RegisterAt(metricServer, "/metrics")
hosts := map[string]*Host{}
internal := fiber.New(fiber.Config{
GETOnly: true,
StrictRouting: true,
})
internal.Use(healthcheck.New(healthcheck.Config{}))
hosts["fly-internal"] = &Host{internal}
website := fiber.New(fiber.Config{
EnableTrustedProxyCheck: true,
TrustedProxies: []string{"172.16.0.0/16"},
ProxyHeader: "Fly-Client-IP",
GETOnly: true,
ReadTimeout: 5 * time.Minute,
WriteTimeout: 5 * time.Minute,
ServerHeader: "Fiber",
StrictRouting: true,
UnescapePath: true,
})
website.Use(prometheus.Middleware)
website.Use(fibersentry.New(fibersentry.Config{}))
website.Use(compress.New())
website.Use(cache.New(cache.Config{
CacheControl: true,
Expiration: 24 * time.Hour,
StoreResponseHeaders: true,
}))
// must be after compress to be encoding-independent
website.Use(etag.New(etag.Config{
Weak: true,
}))
website.Use(recover.New(recover.Config{}))
files := http.FS(fs)
notFoundHandler := func(c *fiber.Ctx) error {
c.Status(fiber.StatusNotFound).Type("html", "utf-8")
content, err := files.Open("public/404.html")
if err != nil {
c.Type("txt")
return c.SendString("404 Not Found")
}
return c.SendStream(content)
}
website.Get("/404.html", notFoundHandler)
website.Use("/", filesystem.New(filesystem.Config{
Root: files,
PathPrefix: "public",
ContentTypeCharset: "utf-8",
MaxAge: int((24 * time.Hour).Seconds()),
}))
website.Use(notFoundHandler)
hosts[config.BaseURL.Host] = &Host{website}
toplevel := fiber.New(fiber.Config{
DisableStartupMessage: config.Production,
})
toplevel.Get("/health", func(c *fiber.Ctx) error {
return c.SendStatus(fiber.StatusOK)
})
var logWriter io.Writer
if config.Production {
logWriter = law.NewWriteAsyncer(os.Stdout, nil)
} else {
logWriter = os.Stdout
}
toplevel.Use(skip.New(logger.New(logger.Config{
Output: logWriter,
Format: "${protocol} ${method} ${status} ${host} ${url} ${respHeader:Location}\n",
}), func(c *fiber.Ctx) bool {
return c.Hostname() == "fly-internal"
}))
toplevel.Use(func(c *fiber.Ctx) error {
host := hosts[c.Hostname()]
if host == nil {
if config.RedirectOtherHostnames {
return c.Redirect(config.BaseURL.JoinPath(c.OriginalURL()).String())
} else {
hosts[config.BaseURL.Host].Fiber.Handler()(c.Context())
return nil
}
} else {
host.Fiber.Handler()(c.Context())
return nil
}
})
go func() {
err := metricServer.Listen(":9091")
log.Printf("failed to start metrics server: %v", err)
}()
log.Fatal(toplevel.Listen(fmt.Sprintf("%s:%d", "", config.Port)))
}
|