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
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
package session
import (
"crypto/tls"
"errors"
"net"
"net/http"
"net/url"
"strings"
"time"
"github.com/sirupsen/logrus"
"gitlab.com/gitlab-org/gitlab-runner/helpers/certificate"
)
var (
ErrInvalidURL = errors.New("url not valid, scheme defined")
)
type sessionFinderFn func(url string) *Session
type Server struct {
config ServerConfig
log *logrus.Entry
tlsListener net.Listener
sessionFinder sessionFinderFn
httpServer *http.Server
CertificatePublicKey []byte
AdvertiseAddress string
}
type ServerConfig struct {
AdvertiseAddress string
ListenAddress string
ShutdownTimeout time.Duration
}
func NewServer(
config ServerConfig,
logger *logrus.Entry,
certGen certificate.Generator,
sessionFinder sessionFinderFn,
) (*Server, error) {
if logger == nil {
logger = logrus.NewEntry(logrus.StandardLogger())
}
server := Server{
config: config,
log: logger,
sessionFinder: sessionFinder,
httpServer: &http.Server{},
}
host, err := server.getPublicHost()
if err != nil {
return nil, err
}
cert, publicKey, err := certGen.Generate(host)
if err != nil {
return nil, err
}
tlsConfig := tls.Config{
Certificates: []tls.Certificate{cert},
MinVersion: tls.VersionTLS12,
}
// We separate out the listener creation here so that we can return an error
// if the provided address is invalid or there is some other listener error.
listener, err := net.Listen("tcp", server.config.ListenAddress)
if err != nil {
return nil, err
}
server.tlsListener = tls.NewListener(listener, &tlsConfig)
err = server.setAdvertiseAddress()
if err != nil {
return nil, err
}
server.CertificatePublicKey = publicKey
server.httpServer.Handler = http.HandlerFunc(server.handleSessionRequest)
return &server, nil
}
func (s *Server) getPublicHost() (string, error) {
for _, address := range []string{s.config.AdvertiseAddress, s.config.ListenAddress} {
if address == "" {
continue
}
host, _, err := net.SplitHostPort(address)
if err != nil {
s.log.
WithField("address", address).
WithError(err).
Warn("Failed to parse session address")
}
if host == "" {
continue
}
return host, nil
}
return "", errors.New("no valid address provided")
}
func (s *Server) setAdvertiseAddress() error {
s.AdvertiseAddress = s.config.AdvertiseAddress
if s.config.AdvertiseAddress == "" {
s.AdvertiseAddress = s.config.ListenAddress
}
if strings.HasPrefix(s.AdvertiseAddress, "https://") ||
strings.HasPrefix(s.AdvertiseAddress, "http://") {
return ErrInvalidURL
}
s.AdvertiseAddress = "https://" + s.AdvertiseAddress
_, err := url.ParseRequestURI(s.AdvertiseAddress)
return err
}
func (s *Server) handleSessionRequest(w http.ResponseWriter, r *http.Request) {
logger := s.log.WithField("uri", r.RequestURI)
logger.Debug("Processing session request")
session := s.sessionFinder(r.RequestURI)
if session == nil || session.Handler() == nil { //nolint:staticcheck
logger.Error("Mux handler not found")
http.NotFound(w, r)
return
}
session.Handler().ServeHTTP(w, r)
}
func (s *Server) Start() error {
if s.httpServer == nil {
return errors.New("http server not set")
}
err := s.httpServer.Serve(s.tlsListener)
// ErrServerClosed is a legitimate error that should not cause failure
if err == http.ErrServerClosed {
return nil
}
return err
}
func (s *Server) Close() {
if s.httpServer != nil {
_ = s.httpServer.Close()
}
}
|
