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package spartan
import (
"bufio"
"context"
"errors"
"fmt"
"io"
"net"
"strings"
sr "tildegit.org/tjp/sliderule"
"tildegit.org/tjp/sliderule/internal"
"tildegit.org/tjp/sliderule/logging"
)
type spartanServer struct {
internal.Server
handler sr.Handler
}
func (ss spartanServer) Protocol() string { return "SPARTAN" }
// NewServer builds a spartan server.
func NewServer(
ctx context.Context,
hostname string,
network string,
address string,
handler sr.Handler,
errLog logging.Logger,
) (sr.Server, error) {
ss := &spartanServer{handler: handler}
if strings.IndexByte(hostname, ':') < 0 {
hostname = net.JoinHostPort(hostname, "300")
}
var err error
ss.Server, err = internal.NewServer(ctx, hostname, network, address, errLog, ss.handleConn)
if err != nil {
return nil, err
}
return ss, nil
}
func (ss *spartanServer) handleConn(conn net.Conn) {
buf := bufio.NewReader(conn)
var response *sr.Response
request, clen, err := ParseRequest(buf)
if err != nil {
response = ClientError(err)
} else {
request.Server = ss
request.RemoteAddr = conn.RemoteAddr()
var body io.Reader = nil
if clen > 0 {
body = io.LimitReader(buf, int64(clen))
}
request.Meta = body
defer func() {
if r := recover(); r != nil {
err := fmt.Errorf("%s", r)
_ = ss.LogError("msg", "panic in handler", "err", err)
rdr := NewResponseReader(ServerError(errors.New("Server error")))
_, _ = io.Copy(conn, rdr)
}
}()
response = ss.handler.Handle(ss.Ctx, request)
if response == nil {
response = ClientError(errors.New("Resource does not exist."))
}
}
defer response.Close()
_, _ = io.Copy(conn, NewResponseReader(response))
}
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