violet/servers/http.go

96 lines
2.6 KiB
Go

package servers
import (
"fmt"
"github.com/MrMelon54/violet/utils"
"github.com/julienschmidt/httprouter"
"log"
"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 Lets Encrypt HTTP verification.
func NewHttpServer(conf *Conf) *http.Server {
r := httprouter.New()
var secureExtend string
_, httpsPort, ok := utils.SplitDomainPort(conf.HttpsListen, 443)
if !ok {
httpsPort = 443
}
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) {
if h, ok := utils.GetDomainWithoutPort(req.Host); ok {
// check if the host is valid
if !conf.Domains.IsValid(req.Host) {
http.Error(rw, fmt.Sprintf("%d %s\n", 420, "Invalid host"), 420)
return
}
// check if the key is valid
key := params.ByName("key")
if key == "" {
rw.WriteHeader(http.StatusNotFound)
return
}
// prepare for executing query
prepare, err := conf.DB.Prepare("select value from acme_challenges limit 1 where domain = ? and key = ?")
if err != nil {
utils.RespondHttpStatus(rw, http.StatusInternalServerError)
return
}
// query the row and extract the value
row := prepare.QueryRow(h, key)
var value string
err = row.Scan(&value)
if err != nil {
utils.RespondHttpStatus(rw, http.StatusInternalServerError)
return
}
// output response
rw.WriteHeader(http.StatusOK)
_, _ = rw.Write([]byte(value))
}
rw.WriteHeader(http.StatusNotFound)
})
// All other paths lead here and are forwarded to HTTPS
r.NotFound = http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
if h, ok := utils.GetDomainWithoutPort(req.Host); ok {
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)
}
})
// Create and run http server
s := &http.Server{
Addr: conf.HttpListen,
Handler: r,
ReadTimeout: time.Minute,
ReadHeaderTimeout: time.Minute,
WriteTimeout: time.Minute,
IdleTimeout: time.Minute,
MaxHeaderBytes: 2500,
}
log.Printf("[HTTP] Starting HTTP server on: '%s'\n", s.Addr)
go utils.RunBackgroundHttp("HTTP", s)
return s
}