mirror of
https://github.com/1f349/violet.git
synced 2024-11-09 22:22:50 +00:00
105 lines
3.2 KiB
Go
105 lines
3.2 KiB
Go
package servers
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import (
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"crypto/tls"
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"fmt"
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"github.com/1f349/violet/favicons"
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"github.com/1f349/violet/servers/conf"
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"github.com/1f349/violet/utils"
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"github.com/sethvargo/go-limiter/httplimit"
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"github.com/sethvargo/go-limiter/memorystore"
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"log"
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"net/http"
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"path"
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"runtime"
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"time"
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)
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// NewHttpsServer creates and runs a http server containing the public https
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// endpoints for the reverse proxy.
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func NewHttpsServer(conf *conf.Conf) *http.Server {
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r := http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
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log.Printf("[Debug] Request: %s - '%s' - '%s' - '%s' - len: %d - thread: %d\n", req.Method, req.URL.String(), req.RemoteAddr, req.Host, req.ContentLength, runtime.NumGoroutine())
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conf.Router.ServeHTTP(rw, req)
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})
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favMiddleware := setupFaviconMiddleware(conf.Favicons, r)
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rateLimiter := setupRateLimiter(conf.RateLimit, favMiddleware)
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return &http.Server{
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Addr: conf.HttpsListen,
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Handler: http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
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rw.Header().Set("Strict-Transport-Security", "max-age=63072000; includeSubDomains")
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rateLimiter.ServeHTTP(rw, req)
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}),
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TLSConfig: &tls.Config{GetCertificate: func(info *tls.ClientHelloInfo) (*tls.Certificate, error) {
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// error out on invalid domains
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if !conf.Domains.IsValid(info.ServerName) {
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return nil, fmt.Errorf("invalid hostname used: '%s'", info.ServerName)
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}
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// find a certificate
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cert := conf.Certs.GetCertForDomain(info.ServerName)
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if cert == nil {
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return nil, fmt.Errorf("failed to find certificate for: '%s'", info.ServerName)
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}
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// time to return
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return cert, nil
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}},
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ReadTimeout: 150 * time.Second,
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ReadHeaderTimeout: 150 * time.Second,
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WriteTimeout: 150 * time.Second,
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IdleTimeout: 150 * time.Second,
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MaxHeaderBytes: 4096000,
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}
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}
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// setupRateLimiter is an internal function to create a middleware to manage
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// rate limits.
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func setupRateLimiter(rateLimit uint64, next http.Handler) http.Handler {
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// create memory store
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store, err := memorystore.New(&memorystore.Config{
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Tokens: rateLimit,
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Interval: time.Minute,
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})
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if err != nil {
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log.Fatalln(err)
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}
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// create a middleware using ips as the key for rate limits
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middleware, err := httplimit.NewMiddleware(store, httplimit.IPKeyFunc())
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if err != nil {
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log.Fatalln(err)
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}
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return middleware.Handle(next)
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}
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func setupFaviconMiddleware(fav *favicons.Favicons, next http.Handler) http.Handler {
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return http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
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if req.Header.Get("X-Violet-Loop-Detect") == "1" {
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rw.WriteHeader(http.StatusLoopDetected)
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_, _ = rw.Write([]byte("Detected a routing loop\n"))
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return
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}
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if req.Header.Get("X-Violet-Raw-Favicon") != "1" {
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switch req.URL.Path {
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case "/favicon.svg", "/favicon.png", "/favicon.ico":
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icons := fav.GetIcons(req.Host)
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if icons == nil {
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break
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}
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raw, contentType, err := icons.ProduceForExt(path.Ext(req.URL.Path))
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if err != nil {
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utils.RespondVioletError(rw, http.StatusTeapot, "No icon available")
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return
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}
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rw.Header().Set("Content-Type", contentType)
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rw.WriteHeader(http.StatusOK)
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_, _ = rw.Write(raw)
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return
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}
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}
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next.ServeHTTP(rw, req)
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})
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}
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