pages-server/cmd/main.go
2021-12-05 14:48:47 +01:00

118 lines
4.3 KiB
Go

package cmd
import (
"bytes"
"crypto/tls"
"errors"
"fmt"
"net"
"net/http"
"strings"
"time"
"github.com/rs/zerolog/log"
"github.com/urfave/cli/v2"
"github.com/valyala/fasthttp"
"codeberg.org/codeberg/pages/server"
"codeberg.org/codeberg/pages/server/utils"
)
// AllowedCorsDomains lists the domains for which Cross-Origin Resource Sharing is allowed.
// TODO: make it a flag
var AllowedCorsDomains = [][]byte{
[]byte("fonts.codeberg.org"),
[]byte("design.codeberg.org"),
}
// BlacklistedPaths specifies forbidden path prefixes for all Codeberg Pages.
var BlacklistedPaths = [][]byte{
[]byte("/.well-known/acme-challenge/"),
}
// Serve sets up and starts the web server.
func Serve(ctx *cli.Context) error {
giteaRoot := strings.TrimSuffix(ctx.String("gitea-root"), "/")
giteaAPIToken := ctx.String("gitea-api-token")
rawDomain := ctx.String("raw-domain")
mainDomainSuffix := []byte(ctx.String("main-domain-suffix"))
rawInfoPage := ctx.String("raw-info-page")
listeningAddress := fmt.Sprintf("%s:%s", ctx.String("host"), ctx.String("port"))
enableHTTPServer := ctx.Bool("enable-http-server")
acmeAPI := ctx.String("acme-api")
acmeMail := ctx.String("acme-email")
acmeUseRateLimits := ctx.Bool("acme-use-rate-limits")
acmeAcceptTerms := ctx.Bool("acme-accept-terms")
acmeEabKID := ctx.String("acme-eab-kid")
acmeEabHmac := ctx.String("acme-eab-hmac")
dnsProvider := ctx.String("dns-provider")
if acmeAcceptTerms || (dnsProvider == "" && acmeAPI != "https://acme.mock.directory") {
return errors.New("you must set $ACME_ACCEPT_TERMS and $DNS_PROVIDER, unless $ACME_API is set to https://acme.mock.directory")
}
allowedCorsDomains := AllowedCorsDomains
if len(rawDomain) != 0 {
allowedCorsDomains = append(allowedCorsDomains, []byte(rawDomain))
}
// Make sure MainDomain has a trailing dot, and GiteaRoot has no trailing slash
if !bytes.HasPrefix(mainDomainSuffix, []byte{'.'}) {
mainDomainSuffix = append([]byte{'.'}, mainDomainSuffix...)
}
// Create handler based on settings
handler := server.Handler(mainDomainSuffix, []byte(rawDomain), giteaRoot, rawInfoPage, giteaAPIToken, BlacklistedPaths, allowedCorsDomains)
// Enable compression by wrapping the handler with the compression function provided by FastHTTP
compressedHandler := fasthttp.CompressHandlerBrotliLevel(handler, fasthttp.CompressBrotliBestSpeed, fasthttp.CompressBestSpeed)
fastServer := &fasthttp.Server{
Handler: compressedHandler,
DisablePreParseMultipartForm: true,
MaxRequestBodySize: 0,
NoDefaultServerHeader: true,
NoDefaultDate: true,
ReadTimeout: 30 * time.Second, // needs to be this high for ACME certificates with ZeroSSL & HTTP-01 challenge
Concurrency: 1024 * 32, // TODO: adjust bottlenecks for best performance with Gitea!
MaxConnsPerIP: 100,
}
// Setup listener and TLS
log.Info().Msgf("Listening on https://%s", listeningAddress)
listener, err := net.Listen("tcp", listeningAddress)
if err != nil {
return fmt.Errorf("couldn't create listener: %s", err)
}
listener = tls.NewListener(listener, server.TlsConfig(mainDomainSuffix, giteaRoot, giteaAPIToken, dnsProvider, acmeUseRateLimits))
server.SetupCertificates(mainDomainSuffix, acmeAPI, acmeMail, acmeEabHmac, acmeEabKID, dnsProvider, acmeUseRateLimits, acmeAcceptTerms, enableHTTPServer)
if enableHTTPServer {
go (func() {
challengePath := []byte("/.well-known/acme-challenge/")
err := fasthttp.ListenAndServe("[::]:80", func(ctx *fasthttp.RequestCtx) {
if bytes.HasPrefix(ctx.Path(), challengePath) {
challenge, ok := server.ChallengeCache.Get(string(utils.TrimHostPort(ctx.Host())) + "/" + string(bytes.TrimPrefix(ctx.Path(), challengePath)))
if !ok || challenge == nil {
ctx.SetStatusCode(http.StatusNotFound)
ctx.SetBodyString("no challenge for this token")
}
ctx.SetBodyString(challenge.(string))
} else {
ctx.Redirect("https://"+string(ctx.Host())+string(ctx.RequestURI()), http.StatusMovedPermanently)
}
})
if err != nil {
log.Fatal().Err(err).Msg("Couldn't start HTTP fastServer")
}
})()
}
// Start the web fastServer
err = fastServer.Serve(listener)
if err != nil {
log.Fatal().Err(err).Msg("Couldn't start fastServer")
}
return nil
}