implement static server

4 files changed, 265 insertions, 3 deletions

diff --git a/.gitignore b/.gitignore
index 5df5eb6..ae7753d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -171,3 +171,4 @@ dist
 /public/
 /.compressstamp
 /.formatstamp
+/server
diff --git a/cmd/server/server.go b/cmd/server/server.go
new file mode 100644
index 0000000..1af6fdf
--- /dev/null
+++ b/cmd/server/server.go
@@ -0,0 +1,136 @@
+package main
+
+import (
+	"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
+}
+
+func main() {
+	err := sentry.Init(sentry.ClientOptions{
+		Dsn:         os.Getenv("SENTRY_DSN"),
+		Release:     os.Getenv("FLY_MACHINE_VERSION"),
+		Environment: os.Getenv("ENVIRONMENT"),
+	})
+	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{}))
+
+	notFoundHandler := func(c *fiber.Ctx) error {
+		return c.Status(fiber.StatusNotFound).SendFile("public/404.html")
+	}
+	website.Get("/404.html", notFoundHandler)
+	website.Use("/", filesystem.New(filesystem.Config{
+		Root:               http.Dir("./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)))
+}
diff --git a/go.mod b/go.mod
index c65f7d6..4aa3127 100644
--- a/go.mod
+++ b/go.mod
@@ -6,17 +6,46 @@ require (
 	github.com/BurntSushi/toml v1.2.1
 	github.com/PuerkitoBio/goquery v1.9.1
 	github.com/adrg/frontmatter v0.2.0
+	github.com/ansrivas/fiberprometheus/v2 v2.6.1
 	github.com/antchfx/xmlquery v1.4.0
 	github.com/antchfx/xpath v1.3.0
 	github.com/deckarep/golang-set/v2 v2.6.0
+	github.com/getsentry/sentry-go v0.27.0
+	github.com/gofiber/contrib/fibersentry v1.0.4
+	github.com/gofiber/fiber/v2 v2.52.4
 	github.com/pkg/errors v0.9.1
+	github.com/shengyanli1982/law v0.1.12
 	github.com/yuin/goldmark v1.7.1
 )
 
 require (
+	github.com/andybalholm/brotli v1.1.0 // indirect
 	github.com/andybalholm/cascadia v1.3.2 // indirect
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/cespare/xxhash/v2 v2.2.0 // indirect
+	github.com/gofiber/adaptor/v2 v2.2.1 // indirect
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
+	github.com/golang/protobuf v1.5.3 // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/klauspost/compress v1.17.8 // indirect
+	github.com/kr/text v0.1.0 // indirect
+	github.com/mattn/go-colorable v0.1.13 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/mattn/go-runewidth v0.0.15 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
+	github.com/philhofer/fwd v1.1.2 // indirect
+	github.com/prometheus/client_golang v1.16.0 // indirect
+	github.com/prometheus/client_model v0.4.0 // indirect
+	github.com/prometheus/common v0.44.0 // indirect
+	github.com/prometheus/procfs v0.11.0 // indirect
+	github.com/rivo/uniseg v0.4.7 // indirect
+	github.com/tinylib/msgp v1.1.8 // indirect
+	github.com/valyala/bytebufferpool v1.0.0 // indirect
+	github.com/valyala/fasthttp v1.52.0 // indirect
+	github.com/valyala/tcplisten v1.0.0 // indirect
 	golang.org/x/net v0.21.0 // indirect
+	golang.org/x/sys v0.19.0 // indirect
 	golang.org/x/text v0.14.0 // indirect
-	gopkg.in/yaml.v2 v2.3.0 // indirect
+	google.golang.org/protobuf v1.30.0 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
 )
diff --git a/go.sum b/go.sum
index 1431eeb..1d1f161 100644
--- a/go.sum
+++ b/go.sum
@@ -5,33 +5,112 @@ github.com/PuerkitoBio/goquery v1.9.1 h1:mTL6XjbJTZdpfL+Gwl5U2h1l9yEkJjhmlTeV9VP
 github.com/PuerkitoBio/goquery v1.9.1/go.mod h1:cW1n6TmIMDoORQU5IU/P1T3tGFunOeXEpGP2WHRwkbY=
 github.com/adrg/frontmatter v0.2.0 h1:/DgnNe82o03riBd1S+ZDjd43wAmC6W35q67NHeLkPd4=
 github.com/adrg/frontmatter v0.2.0/go.mod h1:93rQCj3z3ZlwyxxpQioRKC1wDLto4aXHrbqIsnH9wmE=
+github.com/andybalholm/brotli v1.1.0 h1:eLKJA0d02Lf0mVpIDgYnqXcUn0GqVmEFny3VuID1U3M=
+github.com/andybalholm/brotli v1.1.0/go.mod h1:sms7XGricyQI9K10gOSf56VKKWS4oLer58Q+mhRPtnY=
 github.com/andybalholm/cascadia v1.3.2 h1:3Xi6Dw5lHF15JtdcmAHD3i1+T8plmv7BQ/nsViSLyss=
 github.com/andybalholm/cascadia v1.3.2/go.mod h1:7gtRlve5FxPPgIgX36uWBX58OdBsSS6lUvCFb+h7KvU=
+github.com/ansrivas/fiberprometheus/v2 v2.6.1 h1:wac3pXaE6BYYTF04AC6K0ktk6vCD+MnDOJZ3SK66kXM=
+github.com/ansrivas/fiberprometheus/v2 v2.6.1/go.mod h1:MloIKvy4yN6hVqlRpJ/jDiR244YnWJaQC0FIqS8A+MY=
 github.com/antchfx/xmlquery v1.4.0 h1:xg2HkfcRK2TeTbdb0m1jxCYnvsPaGY/oeZWTGqX/0hA=
 github.com/antchfx/xmlquery v1.4.0/go.mod h1:Ax2aeaeDjfIw3CwXKDQ0GkwZ6QlxoChlIBP+mGnDFjI=
 github.com/antchfx/xpath v1.3.0 h1:nTMlzGAK3IJ0bPpME2urTuFL76o4A96iYvoKFHRXJgc=
 github.com/antchfx/xpath v1.3.0/go.mod h1:i54GszH55fYfBmoZXapTHN8T8tkcHfRgLyVwwqzXNcs=
+github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
+github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
+github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
+github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
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 github.com/deckarep/golang-set/v2 v2.6.0 h1:XfcQbWM1LlMB8BsJ8N9vW5ehnnPVIw0je80NsVHagjM=
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+github.com/getsentry/sentry-go v0.27.0 h1:Pv98CIbtB3LkMWmXi4Joa5OOcwbmnX88sF5qbK3r3Ps=
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+github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
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@@ -40,15 +119,22 @@ golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7w
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