forked from contribsys/faktory
-
Notifications
You must be signed in to change notification settings - Fork 0
/
server.go
308 lines (265 loc) · 6.02 KB
/
server.go
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
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
package server
import (
"bufio"
"crypto/sha256"
"crypto/subtle"
"crypto/tls"
"encoding/json"
"fmt"
"io"
"math/rand"
"net"
"strconv"
"strings"
"sync"
"sync/atomic"
"time"
"github.com/contribsys/faktory"
"github.com/contribsys/faktory/storage"
"github.com/contribsys/faktory/util"
)
var (
EventHandlers = make([]func(*Server) error, 0)
)
type ServerOptions struct {
Binding string
StorageDirectory string
ConfigDirectory string
Environment string
DisableTls bool
}
type RuntimeStats struct {
Processed int64
Failures int64
Connections int64
Commands int64
StartedAt time.Time
}
type Server struct {
Options *ServerOptions
Stats *RuntimeStats
TLSConfig *tls.Config
Password string
listener net.Listener
store storage.Store
taskRunner *taskRunner
pending *sync.WaitGroup
mu sync.Mutex
heartbeats map[string]*ClientWorker
hbmu sync.Mutex
}
// register a global handler to be called when the Server instance
// has finished booting but before it starts listening.
func OnStart(x func(*Server) error) {
EventHandlers = append(EventHandlers, x)
}
func NewServer(opts *ServerOptions) (*Server, error) {
if opts.Binding == "" {
opts.Binding = "localhost:7419"
}
if opts.StorageDirectory == "" {
return nil, fmt.Errorf("empty storage directory")
}
s := &Server{
Options: opts,
Stats: &RuntimeStats{StartedAt: time.Now()},
pending: &sync.WaitGroup{},
mu: sync.Mutex{},
heartbeats: make(map[string]*ClientWorker, 12),
hbmu: sync.Mutex{},
}
tlsC, err := tlsConfig(s.Options.Binding, s.Options.DisableTls, s.Options.ConfigDirectory)
if err != nil {
return nil, err
}
if tlsC != nil {
s.TLSConfig = tlsC
pwd, err := fetchPassword(s.Options.ConfigDirectory)
if err != nil {
return nil, err
}
s.Password = pwd
// if we need TLS, we need a password too
if s.Password == "" {
return nil, fmt.Errorf("Cannot enable TLS without a password")
}
}
return s, nil
}
func (s *Server) Heartbeats() map[string]*ClientWorker {
return s.heartbeats
}
func (s *Server) Store() storage.Store {
return s.store
}
func (s *Server) Start() error {
store, err := storage.Open("rocksdb", s.Options.StorageDirectory)
if err != nil {
return err
}
defer store.Close()
var listener net.Listener
if s.TLSConfig != nil {
listener, err = tls.Listen("tcp", s.Options.Binding, s.TLSConfig)
if err != nil {
return err
}
util.Infof("Now listening securely at %s, press Ctrl-C to stop", s.Options.Binding)
} else {
listener, err = net.Listen("tcp", s.Options.Binding)
if err != nil {
return err
}
util.Infof("Now listening at %s, press Ctrl-C to stop", s.Options.Binding)
}
s.mu.Lock()
s.store = store
s.listener = listener
s.loadWorkingSet()
s.startTasks(s.pending)
s.startScanners(s.pending)
s.mu.Unlock()
// wait for outstanding requests to finish
defer s.pending.Wait()
defer s.taskRunner.Stop()
for _, x := range EventHandlers {
err := x(s)
if err != nil {
return err
}
}
// this is the central runtime loop for the main goroutine
for {
conn, err := s.listener.Accept()
if err != nil {
return nil
}
go func() {
s.pending.Add(1)
defer s.pending.Done()
c := startConnection(conn, s)
if c == nil {
return
}
processLines(c, s)
}()
}
}
func (s *Server) Stop(f func()) {
// Don't allow new network connections
s.mu.Lock()
if s.listener != nil {
s.listener.Close()
}
s.mu.Unlock()
time.Sleep(100 * time.Millisecond)
if f != nil {
f()
}
}
func hash(pwd, salt string) string {
return fmt.Sprintf("%x", sha256.Sum256([]byte(pwd+salt)))
}
func startConnection(conn net.Conn, s *Server) *Connection {
// handshake must complete within 1 second
conn.SetDeadline(time.Now().Add(1 * time.Second))
var salt string
conn.Write([]byte(`+HI {"v":"1"`))
if s.Password != "" {
salt = strconv.FormatInt(rand.Int63(), 16)
conn.Write([]byte(`,"s":"`))
conn.Write([]byte(salt))
conn.Write([]byte(`"}`))
} else {
conn.Write([]byte("}"))
}
conn.Write([]byte("\r\n"))
buf := bufio.NewReader(conn)
line, err := buf.ReadString('\n')
if err != nil {
util.Error("Closing connection", err, nil)
conn.Close()
return nil
}
valid := strings.HasPrefix(line, "HELLO {")
if !valid {
util.Info("Invalid preamble", line)
util.Info("Need a valid AHOY")
conn.Close()
return nil
}
client, err := clientWorkerFromAhoy(line[5:])
if err != nil {
util.Error("Invalid client data in AHOY", err, nil)
conn.Close()
return nil
}
if s.Password != "" {
if subtle.ConstantTimeCompare([]byte(client.PasswordHash), []byte(hash(s.Password, salt))) != 1 {
conn.Write([]byte("-ERR Invalid password\r\n"))
conn.Close()
return nil
}
}
updateHeartbeat(client, s.heartbeats, &s.hbmu)
_, err = conn.Write([]byte("+OK\r\n"))
if err != nil {
util.Error("Closing connection", err, nil)
conn.Close()
return nil
}
// disable deadline
conn.SetDeadline(time.Time{})
return &Connection{
client: client,
ident: conn.RemoteAddr().String(),
conn: conn,
buf: buf,
}
}
func processLines(conn *Connection, server *Server) {
atomic.AddInt64(&server.Stats.Connections, 1)
defer atomic.AddInt64(&server.Stats.Connections, -1)
for {
atomic.AddInt64(&server.Stats.Commands, 1)
cmd, e := conn.buf.ReadString('\n')
if e != nil {
if e != io.EOF {
util.Error("Unexpected socket error", e, nil)
}
conn.Close()
return
}
cmd = strings.TrimSuffix(cmd, "\r\n")
cmd = strings.TrimSuffix(cmd, "\n")
//util.Debug(cmd)
idx := strings.Index(cmd, " ")
verb := cmd
if idx >= 0 {
verb = cmd[0:idx]
}
proc, ok := cmdSet[verb]
if !ok {
conn.Error(cmd, fmt.Errorf("Unknown command %s", verb))
} else {
proc(conn, server, cmd)
}
if verb == "END" {
break
}
}
}
func parseJob(buf []byte) (*faktory.Job, error) {
var job faktory.Job
err := json.Unmarshal(buf, &job)
if err != nil {
return nil, err
}
if job.CreatedAt == "" {
job.CreatedAt = util.Nows()
}
if job.Queue == "" {
job.Queue = "default"
}
return &job, nil
}