1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
package spartan
import (
"bufio"
"context"
"errors"
"fmt"
"io"
"net"
"strings"
"tildegit.org/tjp/gus"
"tildegit.org/tjp/gus/internal"
"tildegit.org/tjp/gus/logging"
)
type spartanRequestBodyKey struct{}
type spartanRequestBodyLenKey struct{}
// SpartanRequestBody is the key set in a handler's context for spartan request bodies.
//
// The corresponding value is a *bufio.Reader from which the request body can be read.
var SpartanRequestBody = spartanRequestBodyKey{}
// SpartanRequestBodyLen is the key set in a handler's context for the content-length of the request.
//
// The corresponding value is an int.
var SpartanRequestBodyLen = spartanRequestBodyLenKey{}
type spartanServer struct {
internal.Server
handler gus.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 gus.Handler,
errLog logging.Logger,
) (gus.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 *gus.Response
request, clen, err := ParseRequest(buf)
if err != nil {
response = ClientError(err)
} else {
request.Server = ss
request.RemoteAddr = conn.RemoteAddr()
var body *bufio.Reader = nil
if clen > 0 {
body = bufio.NewReader(io.LimitReader(buf, int64(clen)))
}
ctx := context.WithValue(ss.Ctx, SpartanRequestBody, body)
ctx = context.WithValue(ctx, SpartanRequestBodyLen, clen)
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(ctx, request)
if response == nil {
response = ClientError(errors.New("Resource does not exist."))
}
}
defer response.Close()
_, _ = io.Copy(conn, NewResponseReader(response))
}
|
