violet/servers/https.go
2023-06-04 22:28:48 +01:00

107 lines
3.0 KiB
Go

package servers
import (
"crypto/tls"
"fmt"
"github.com/MrMelon54/violet/favicons"
"github.com/MrMelon54/violet/utils"
"github.com/sethvargo/go-limiter/httplimit"
"github.com/sethvargo/go-limiter/memorystore"
"log"
"net"
"net/http"
"time"
)
// NewHttpsServer creates and runs a http server containing the public https
// endpoints for the reverse proxy.
func NewHttpsServer(conf *Conf) *http.Server {
return &http.Server{
Addr: conf.HttpsListen,
Handler: setupRateLimiter(conf.RateLimit, setupFaviconMiddleware(conf.Favicons, conf.Router)),
TLSConfig: &tls.Config{GetCertificate: func(info *tls.ClientHelloInfo) (*tls.Certificate, error) {
// error out on invalid domains
if !conf.Domains.IsValid(info.ServerName) {
return nil, fmt.Errorf("invalid hostname used: '%s'", info.ServerName)
}
// find a certificate
cert := conf.Certs.GetCertForDomain(info.ServerName)
if cert == nil {
return nil, fmt.Errorf("failed to find certificate for: '%s'", info.ServerName)
}
// time to return
return cert, nil
}},
ReadTimeout: 150 * time.Second,
ReadHeaderTimeout: 150 * time.Second,
WriteTimeout: 150 * time.Second,
IdleTimeout: 150 * time.Second,
MaxHeaderBytes: 4096000,
ConnState: func(conn net.Conn, state http.ConnState) {
fmt.Printf("[HTTPS] %s => %s: %s\n", conn.LocalAddr(), conn.RemoteAddr(), state.String())
},
}
}
// setupRateLimiter is an internal function to create a middleware to manage
// rate limits.
func setupRateLimiter(rateLimit uint64, next http.Handler) http.Handler {
// create memory store
store, err := memorystore.New(&memorystore.Config{
Tokens: rateLimit,
Interval: time.Minute,
})
if err != nil {
log.Fatalln(err)
}
// create a middleware using ips as the key for rate limits
middleware, err := httplimit.NewMiddleware(store, httplimit.IPKeyFunc())
if err != nil {
log.Fatalln(err)
}
return middleware.Handle(next)
}
func setupFaviconMiddleware(fav *favicons.Favicons, next http.Handler) http.Handler {
return http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
if req.Header.Get("X-Violet-Raw-Favicon") != "1" {
switch req.URL.Path {
case "/favicon.svg":
icons := fav.GetIcons(req.Host)
raw, err := icons.ProduceSvg()
if err != nil {
utils.RespondVioletError(rw, http.StatusTeapot, "No SVG icon available")
return
}
rw.WriteHeader(http.StatusOK)
_, _ = rw.Write(raw)
return
case "/favicon.png":
icons := fav.GetIcons(req.Host)
raw, err := icons.ProducePng()
if err != nil {
utils.RespondVioletError(rw, http.StatusTeapot, "No PNG icon available")
return
}
rw.WriteHeader(http.StatusOK)
_, _ = rw.Write(raw)
return
case "/favicon.ico":
icons := fav.GetIcons(req.Host)
raw, err := icons.ProduceIco()
if err != nil {
utils.RespondVioletError(rw, http.StatusTeapot, "No ICO icon available")
return
}
rw.WriteHeader(http.StatusOK)
_, _ = rw.Write(raw)
return
}
}
next.ServeHTTP(rw, req)
})
}