mirror of
https://github.com/1f349/violet.git
synced 2024-11-08 18:16:54 +00:00
129 lines
4.2 KiB
Go
129 lines
4.2 KiB
Go
package servers
|
|
|
|
import (
|
|
"crypto/tls"
|
|
"fmt"
|
|
"github.com/1f349/violet/favicons"
|
|
"github.com/1f349/violet/logger"
|
|
"github.com/1f349/violet/servers/conf"
|
|
"github.com/1f349/violet/servers/metrics"
|
|
"github.com/1f349/violet/utils"
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
"github.com/sethvargo/go-limiter/httplimit"
|
|
"github.com/sethvargo/go-limiter/memorystore"
|
|
"net/http"
|
|
"path"
|
|
"runtime"
|
|
"time"
|
|
)
|
|
|
|
// NewHttpsServer creates and runs a http server containing the public https
|
|
// endpoints for the reverse proxy.
|
|
func NewHttpsServer(conf *conf.Conf, registry *prometheus.Registry) *http.Server {
|
|
r := http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
|
|
logger.Logger.Debug("Request", "method", req.Method, "url", req.URL, "remote", req.RemoteAddr, "host", req.Host, "length", req.ContentLength, "goroutine", runtime.NumGoroutine())
|
|
conf.Router.ServeHTTP(rw, req)
|
|
})
|
|
favMiddleware := setupFaviconMiddleware(conf.Favicons, r)
|
|
|
|
metricsMeta := http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
|
|
r.ServeHTTP(rw, req)
|
|
})
|
|
if registry != nil {
|
|
metricsMiddleware := metrics.New(registry, nil).WrapHandler("violet-https", favMiddleware)
|
|
metricsMeta = func(rw http.ResponseWriter, req *http.Request) {
|
|
metricsMiddleware.ServeHTTP(rw, metrics.AddHostCtx(req))
|
|
}
|
|
}
|
|
rateLimiter := setupRateLimiter(conf.RateLimit, metricsMeta)
|
|
hsts := http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
|
|
rw.Header().Set("Strict-Transport-Security", "max-age=63072000; includeSubDomains")
|
|
rateLimiter.ServeHTTP(rw, req)
|
|
})
|
|
|
|
return &http.Server{
|
|
Handler: hsts,
|
|
TLSConfig: &tls.Config{
|
|
// Suggested by https://ssl-config.mozilla.org/#server=go&version=1.21.5&config=intermediate
|
|
MinVersion: tls.VersionTLS12,
|
|
CipherSuites: []uint16{
|
|
tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
|
|
tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
|
|
tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
|
|
tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
|
|
tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,
|
|
tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
|
|
},
|
|
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,
|
|
}
|
|
}
|
|
|
|
// 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 {
|
|
logger.Logger.Fatal("Failed to initialize memory store", "err", err)
|
|
}
|
|
|
|
// create a middleware using ips as the key for rate limits
|
|
middleware, err := httplimit.NewMiddleware(store, httplimit.IPKeyFunc())
|
|
if err != nil {
|
|
logger.Logger.Fatal("Failed to initialize httplimit middleware", "err", 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-Loop-Detect") == "1" {
|
|
rw.WriteHeader(http.StatusLoopDetected)
|
|
_, _ = rw.Write([]byte("Detected a routing loop\n"))
|
|
return
|
|
}
|
|
if req.Header.Get("X-Violet-Raw-Favicon") != "1" {
|
|
switch req.URL.Path {
|
|
case "/favicon.svg", "/favicon.png", "/favicon.ico":
|
|
icons := fav.GetIcons(req.Host)
|
|
if icons == nil {
|
|
break
|
|
}
|
|
raw, contentType, err := icons.ProduceForExt(path.Ext(req.URL.Path))
|
|
if err != nil {
|
|
utils.RespondVioletError(rw, http.StatusTeapot, "No icon available")
|
|
return
|
|
}
|
|
rw.Header().Set("Content-Type", contentType)
|
|
rw.WriteHeader(http.StatusOK)
|
|
_, _ = rw.Write(raw)
|
|
return
|
|
}
|
|
}
|
|
next.ServeHTTP(rw, req)
|
|
})
|
|
}
|