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package nex
import (
"bytes"
"context"
"crypto/tls"
"fmt"
"io"
"net"
"tildegit.org/tjp/sliderule/internal"
"tildegit.org/tjp/sliderule/internal/types"
"tildegit.org/tjp/sliderule/logging"
)
type nexServer struct {
internal.Server
handler types.Handler
}
func (ns nexServer) Protocol() string { return "NEX" }
// NewServer builds a new nex server
func NewServer(
ctx context.Context,
hostname string,
network string,
address string,
handler types.Handler,
baseLog logging.Logger,
) (types.Server, error) {
ns := &nexServer{handler: handler}
hostname = internal.JoinDefaultPort(hostname, "1900")
address = internal.JoinDefaultPort(address, "1900")
var err error
ns.Server, err = internal.NewServer(ctx, hostname, network, address, baseLog, ns.handleConn)
if err != nil {
return nil, err
}
return ns, err
}
func NewTLSServer(
ctx context.Context,
hostname string,
network string,
address string,
handler types.Handler,
baseLog logging.Logger,
tlsConfig *tls.Config,
) (types.Server, error) {
ns, err := NewServer(ctx, hostname, network, address, handler, baseLog)
if err != nil {
return nil, err
}
ns.(*nexServer).Listener = tls.NewListener(ns.(*nexServer).Listener, tlsConfig)
return ns, nil
}
func (ns *nexServer) handleConn(conn net.Conn) {
request, err := ParseRequest(conn)
if err != nil {
_, _ = fmt.Fprint(conn, err.Error()+"\n")
}
request.Server = ns
request.RemoteAddr = conn.RemoteAddr()
if tlsconn, ok := conn.(*tls.Conn); ok {
state := tlsconn.ConnectionState()
request.TLSState = &state
}
defer func() {
if r := recover(); r != nil {
_ = ns.LogError("msg", "panic in handler", "err", r)
_, _ = fmt.Fprint(conn, "Error handling request.\n")
}
}()
response := ns.handler.Handle(ns.Ctx, request)
if response == nil {
response = Response(bytes.NewBufferString("Document not found."))
}
defer response.Close()
_, _ = io.Copy(conn, response.Body)
}
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