about summary refs log tree commit diff stats
path: root/server.go
blob: 2a1eed0ed08b725a61fa902ff7713cdbe365074f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
package main

import (
	"embed"
	"fmt"
	"log"
	"net/http"
	"os"
	"time"
	"website/internal/config"

	"github.com/ansrivas/fiberprometheus/v2"
	"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/shengyanli1982/law"
)

// TODO prettify HTML
// 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() {
	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{}
	config, err := config.GetConfig()
	if err != nil {
		log.Panic("config error", err)
	}

	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 := fs.ReadFile("public/404.html")
		if err != nil {
			content = []byte("404 Not Found")
			c.Type("txt")
		}
		return c.Send(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()
	toplevel.Get("/health", func(c *fiber.Ctx) error {
		return c.SendStatus(fiber.StatusOK)
	})
	toplevel.Use(logger.New(logger.Config{
		Output: law.NewWriteAsyncer(os.Stdout, nil),
		Format: "${protocol} ${method} ${status} ${host} ${url} ${respHeader:Location}\n",
	}))
	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)))
}