violet/servers/http.go

79 lines
2.2 KiB
Go

package servers
import (
"fmt"
"github.com/1f349/violet/servers/conf"
"github.com/1f349/violet/servers/metrics"
"github.com/1f349/violet/utils"
"github.com/julienschmidt/httprouter"
"github.com/prometheus/client_golang/prometheus"
"net/http"
"net/url"
"time"
)
// NewHttpServer creates and runs a http server containing the public http
// endpoints for the reverse proxy.
//
// `/.well-known/acme-challenge/{token}` is used for outputting answers for
// acme challenges, this is used for Let's Encrypt HTTP verification.
func NewHttpServer(httpsPort uint16, conf *conf.Conf, registry *prometheus.Registry) *http.Server {
r := httprouter.New()
var secureExtend string
if httpsPort != 443 {
secureExtend = fmt.Sprintf(":%d", httpsPort)
}
// Endpoint for acme challenge outputs
r.GET("/.well-known/acme-challenge/:key", func(rw http.ResponseWriter, req *http.Request, params httprouter.Params) {
h := utils.GetDomainWithoutPort(req.Host)
// check if the host is valid
if !conf.Domains.IsValid(req.Host) {
utils.RespondVioletError(rw, http.StatusBadRequest, "Invalid host")
return
}
// check if the key is valid
value := conf.Acme.Get(h, params.ByName("key"))
if value == "" {
rw.WriteHeader(http.StatusNotFound)
return
}
// output response
rw.WriteHeader(http.StatusOK)
_, _ = rw.Write([]byte(value))
})
// All other paths lead here and are forwarded to HTTPS
r.NotFound = http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
h := utils.GetDomainWithoutPort(req.Host)
u := &url.URL{
Scheme: "https",
Host: h + secureExtend,
Path: req.URL.Path,
RawPath: req.URL.RawPath,
RawQuery: req.URL.RawQuery,
}
utils.FastRedirect(rw, req, u.String(), http.StatusPermanentRedirect)
})
metricsMiddleware := http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
r.ServeHTTP(rw, req)
})
if registry != nil {
metricsMiddleware = metrics.New(registry, nil).WrapHandler("violet-http-insecure", r)
}
// Create and run http server
return &http.Server{
Handler: metricsMiddleware,
ReadTimeout: time.Minute,
ReadHeaderTimeout: time.Minute,
WriteTimeout: time.Minute,
IdleTimeout: time.Minute,
MaxHeaderBytes: 2500,
}
}