forked from ipfs-cluster/ipfs-cluster
-
Notifications
You must be signed in to change notification settings - Fork 0
/
config.go
481 lines (407 loc) · 14.4 KB
/
config.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
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
package common
import (
"crypto/tls"
"encoding/base64"
"encoding/json"
"errors"
"fmt"
"io"
"os"
"path/filepath"
"time"
ipfsconfig "github.com/ipfs/go-ipfs-config"
logging "github.com/ipfs/go-log/v2"
crypto "github.com/libp2p/go-libp2p-core/crypto"
peer "github.com/libp2p/go-libp2p-core/peer"
ma "github.com/multiformats/go-multiaddr"
"github.com/kelseyhightower/envconfig"
"github.com/rs/cors"
"github.com/lubanproj/ipfs-cluster/config"
)
const minMaxHeaderBytes = 4096
const defaultMaxHeaderBytes = minMaxHeaderBytes
// Config provides common API configuration values and allows to customize its
// behavior. It implements most of the config.ComponentConfig interface
// (except the Default() and ConfigKey() methods). Config should be embedded
// in a Config object that implements the missing methods and sets the
// meta options.
type Config struct {
config.Saver
// These are meta-options and should be set by actual Config
// implementations as early as possible.
DefaultFunc func(*Config) error
ConfigKey string
EnvConfigKey string
Logger *logging.ZapEventLogger
RequestLogger *logging.ZapEventLogger
APIErrorFunc func(err error, status int) error
// Listen address for the HTTP REST API endpoint.
HTTPListenAddr []ma.Multiaddr
// TLS configuration for the HTTP listener
TLS *tls.Config
// pathSSLCertFile is a path to a certificate file used to secure the
// HTTP API endpoint. We track it so we can write it in the JSON.
PathSSLCertFile string
// pathSSLKeyFile is a path to the private key corresponding to the
// SSLKeyFile. We track it so we can write it in the JSON.
PathSSLKeyFile string
// Maximum duration before timing out reading a full request
ReadTimeout time.Duration
// Maximum duration before timing out reading the headers of a request
ReadHeaderTimeout time.Duration
// Maximum duration before timing out write of the response
WriteTimeout time.Duration
// Server-side amount of time a Keep-Alive connection will be
// kept idle before being reused
IdleTimeout time.Duration
// Maximum cumulative size of HTTP request headers in bytes
// accepted by the server
MaxHeaderBytes int
// Listen address for the Libp2p REST API endpoint.
Libp2pListenAddr []ma.Multiaddr
// ID and PrivateKey are used to create a libp2p host if we
// want the API component to do it (not by default).
ID peer.ID
PrivateKey crypto.PrivKey
// BasicAuthCredentials is a map of username-password pairs
// which are authorized to use Basic Authentication
BasicAuthCredentials map[string]string
// HTTPLogFile is path of the file that would save HTTP API logs. If this
// path is empty, HTTP logs would be sent to standard output. This path
// should either be absolute or relative to cluster base directory. Its
// default value is empty.
HTTPLogFile string
// Headers provides customization for the headers returned
// by the API on existing routes.
Headers map[string][]string
// CORS header management
CORSAllowedOrigins []string
CORSAllowedMethods []string
CORSAllowedHeaders []string
CORSExposedHeaders []string
CORSAllowCredentials bool
CORSMaxAge time.Duration
// Tracing flag used to skip tracing specific paths when not enabled.
Tracing bool
}
type jsonConfig struct {
HTTPListenMultiaddress ipfsconfig.Strings `json:"http_listen_multiaddress"`
SSLCertFile string `json:"ssl_cert_file,omitempty"`
SSLKeyFile string `json:"ssl_key_file,omitempty"`
ReadTimeout string `json:"read_timeout"`
ReadHeaderTimeout string `json:"read_header_timeout"`
WriteTimeout string `json:"write_timeout"`
IdleTimeout string `json:"idle_timeout"`
MaxHeaderBytes int `json:"max_header_bytes"`
Libp2pListenMultiaddress ipfsconfig.Strings `json:"libp2p_listen_multiaddress,omitempty"`
ID string `json:"id,omitempty"`
PrivateKey string `json:"private_key,omitempty" hidden:"true"`
BasicAuthCredentials map[string]string `json:"basic_auth_credentials" hidden:"true"`
HTTPLogFile string `json:"http_log_file"`
Headers map[string][]string `json:"headers"`
CORSAllowedOrigins []string `json:"cors_allowed_origins"`
CORSAllowedMethods []string `json:"cors_allowed_methods"`
CORSAllowedHeaders []string `json:"cors_allowed_headers"`
CORSExposedHeaders []string `json:"cors_exposed_headers"`
CORSAllowCredentials bool `json:"cors_allow_credentials"`
CORSMaxAge string `json:"cors_max_age"`
}
// GetHTTPLogPath gets full path of the file where http logs should be
// saved.
func (cfg *Config) GetHTTPLogPath() string {
if filepath.IsAbs(cfg.HTTPLogFile) {
return cfg.HTTPLogFile
}
if cfg.BaseDir == "" {
return ""
}
return filepath.Join(cfg.BaseDir, cfg.HTTPLogFile)
}
// ApplyEnvVars fills in any Config fields found as environment variables.
func (cfg *Config) ApplyEnvVars() error {
jcfg, err := cfg.toJSONConfig()
if err != nil {
return err
}
err = envconfig.Process(cfg.EnvConfigKey, jcfg)
if err != nil {
return err
}
return cfg.applyJSONConfig(jcfg)
}
// Validate makes sure that all fields in this Config have
// working values, at least in appearance.
func (cfg *Config) Validate() error {
if cfg.Logger == nil || cfg.RequestLogger == nil {
return errors.New("config loggers not set")
}
switch {
case cfg.ReadTimeout < 0:
return errors.New(cfg.ConfigKey + ".read_timeout is invalid")
case cfg.ReadHeaderTimeout < 0:
return errors.New(cfg.ConfigKey + ".read_header_timeout is invalid")
case cfg.WriteTimeout < 0:
return errors.New(cfg.ConfigKey + ".write_timeout is invalid")
case cfg.IdleTimeout < 0:
return errors.New(cfg.ConfigKey + ".idle_timeout invalid")
case cfg.MaxHeaderBytes < minMaxHeaderBytes:
return fmt.Errorf(cfg.ConfigKey+".max_header_bytes must be not less then %d", minMaxHeaderBytes)
case cfg.BasicAuthCredentials != nil && len(cfg.BasicAuthCredentials) == 0:
return errors.New(cfg.ConfigKey + ".basic_auth_creds should be null or have at least one entry")
case (cfg.PathSSLCertFile != "" || cfg.PathSSLKeyFile != "") && cfg.TLS == nil:
return errors.New(cfg.ConfigKey + ": missing TLS configuration")
case (cfg.CORSMaxAge < 0):
return errors.New(cfg.ConfigKey + ".cors_max_age is invalid")
}
return cfg.validateLibp2p()
}
func (cfg *Config) validateLibp2p() error {
if cfg.ID != "" || cfg.PrivateKey != nil || len(cfg.Libp2pListenAddr) > 0 {
// if one is set, all should be
if cfg.ID == "" || cfg.PrivateKey == nil || len(cfg.Libp2pListenAddr) == 0 {
return errors.New("all ID, private_key and libp2p_listen_multiaddress should be set")
}
if !cfg.ID.MatchesPrivateKey(cfg.PrivateKey) {
return errors.New(cfg.ConfigKey + ".ID does not match private_key")
}
}
return nil
}
// LoadJSON parses a raw JSON byte slice created by ToJSON() and sets the
// configuration fields accordingly.
func (cfg *Config) LoadJSON(raw []byte) error {
jcfg := &jsonConfig{}
err := json.Unmarshal(raw, jcfg)
if err != nil {
cfg.Logger.Error(cfg.ConfigKey + ": error unmarshaling config")
return err
}
if cfg.DefaultFunc == nil {
return errors.New("default config generation not set. This is a bug")
}
cfg.DefaultFunc(cfg)
return cfg.applyJSONConfig(jcfg)
}
func (cfg *Config) applyJSONConfig(jcfg *jsonConfig) error {
err := cfg.loadHTTPOptions(jcfg)
if err != nil {
return err
}
err = cfg.loadLibp2pOptions(jcfg)
if err != nil {
return err
}
// Other options
cfg.BasicAuthCredentials = jcfg.BasicAuthCredentials
cfg.HTTPLogFile = jcfg.HTTPLogFile
cfg.Headers = jcfg.Headers
return cfg.Validate()
}
func (cfg *Config) loadHTTPOptions(jcfg *jsonConfig) error {
if addresses := jcfg.HTTPListenMultiaddress; len(addresses) > 0 {
cfg.HTTPListenAddr = make([]ma.Multiaddr, 0, len(addresses))
for _, addr := range addresses {
httpAddr, err := ma.NewMultiaddr(addr)
if err != nil {
err = fmt.Errorf("error parsing %s.http_listen_multiaddress: %s", cfg.ConfigKey, err)
return err
}
cfg.HTTPListenAddr = append(cfg.HTTPListenAddr, httpAddr)
}
}
err := cfg.tlsOptions(jcfg)
if err != nil {
return err
}
if jcfg.MaxHeaderBytes == 0 {
cfg.MaxHeaderBytes = defaultMaxHeaderBytes
} else {
cfg.MaxHeaderBytes = jcfg.MaxHeaderBytes
}
// CORS
cfg.CORSAllowedOrigins = jcfg.CORSAllowedOrigins
cfg.CORSAllowedMethods = jcfg.CORSAllowedMethods
cfg.CORSAllowedHeaders = jcfg.CORSAllowedHeaders
cfg.CORSExposedHeaders = jcfg.CORSExposedHeaders
cfg.CORSAllowCredentials = jcfg.CORSAllowCredentials
if jcfg.CORSMaxAge == "" { // compatibility
jcfg.CORSMaxAge = "0s"
}
return config.ParseDurations(
cfg.ConfigKey,
&config.DurationOpt{Duration: jcfg.ReadTimeout, Dst: &cfg.ReadTimeout, Name: "read_timeout"},
&config.DurationOpt{Duration: jcfg.ReadHeaderTimeout, Dst: &cfg.ReadHeaderTimeout, Name: "read_header_timeout"},
&config.DurationOpt{Duration: jcfg.WriteTimeout, Dst: &cfg.WriteTimeout, Name: "write_timeout"},
&config.DurationOpt{Duration: jcfg.IdleTimeout, Dst: &cfg.IdleTimeout, Name: "idle_timeout"},
&config.DurationOpt{Duration: jcfg.CORSMaxAge, Dst: &cfg.CORSMaxAge, Name: "cors_max_age"},
)
}
func (cfg *Config) tlsOptions(jcfg *jsonConfig) error {
cert := jcfg.SSLCertFile
key := jcfg.SSLKeyFile
if cert+key == "" {
return nil
}
cfg.PathSSLCertFile = cert
cfg.PathSSLKeyFile = key
if !filepath.IsAbs(cert) {
cert = filepath.Join(cfg.BaseDir, cert)
}
if !filepath.IsAbs(key) {
key = filepath.Join(cfg.BaseDir, key)
}
cfg.Logger.Debug("baseDir: ", cfg.BaseDir)
cfg.Logger.Debug("cert path: ", cert)
cfg.Logger.Debug("key path: ", key)
tlsCfg, err := newTLSConfig(cert, key)
if err != nil {
return err
}
cfg.TLS = tlsCfg
return nil
}
func (cfg *Config) loadLibp2pOptions(jcfg *jsonConfig) error {
if addresses := jcfg.Libp2pListenMultiaddress; len(addresses) > 0 {
cfg.Libp2pListenAddr = make([]ma.Multiaddr, 0, len(addresses))
for _, addr := range addresses {
libp2pAddr, err := ma.NewMultiaddr(addr)
if err != nil {
err = fmt.Errorf("error parsing %s.libp2p_listen_multiaddress: %s", cfg.ConfigKey, err)
return err
}
cfg.Libp2pListenAddr = append(cfg.Libp2pListenAddr, libp2pAddr)
}
}
if jcfg.PrivateKey != "" {
pkb, err := base64.StdEncoding.DecodeString(jcfg.PrivateKey)
if err != nil {
return fmt.Errorf("error decoding %s.private_key: %s", cfg.ConfigKey, err)
}
pKey, err := crypto.UnmarshalPrivateKey(pkb)
if err != nil {
return fmt.Errorf("error parsing %s.private_key ID: %s", cfg.ConfigKey, err)
}
cfg.PrivateKey = pKey
}
if jcfg.ID != "" {
id, err := peer.Decode(jcfg.ID)
if err != nil {
return fmt.Errorf("error parsing %s.ID: %s", cfg.ConfigKey, err)
}
cfg.ID = id
}
return nil
}
// ToJSON produce a human-friendly JSON representation of the Config
// object.
func (cfg *Config) ToJSON() (raw []byte, err error) {
jcfg, err := cfg.toJSONConfig()
if err != nil {
return
}
raw, err = config.DefaultJSONMarshal(jcfg)
return
}
func (cfg *Config) toJSONConfig() (jcfg *jsonConfig, err error) {
// Multiaddress String() may panic
defer func() {
if r := recover(); r != nil {
err = fmt.Errorf("%s", r)
}
}()
httpAddresses := make([]string, 0, len(cfg.HTTPListenAddr))
for _, addr := range cfg.HTTPListenAddr {
httpAddresses = append(httpAddresses, addr.String())
}
libp2pAddresses := make([]string, 0, len(cfg.Libp2pListenAddr))
for _, addr := range cfg.Libp2pListenAddr {
libp2pAddresses = append(libp2pAddresses, addr.String())
}
jcfg = &jsonConfig{
HTTPListenMultiaddress: httpAddresses,
SSLCertFile: cfg.PathSSLCertFile,
SSLKeyFile: cfg.PathSSLKeyFile,
ReadTimeout: cfg.ReadTimeout.String(),
ReadHeaderTimeout: cfg.ReadHeaderTimeout.String(),
WriteTimeout: cfg.WriteTimeout.String(),
IdleTimeout: cfg.IdleTimeout.String(),
MaxHeaderBytes: cfg.MaxHeaderBytes,
BasicAuthCredentials: cfg.BasicAuthCredentials,
HTTPLogFile: cfg.HTTPLogFile,
Headers: cfg.Headers,
CORSAllowedOrigins: cfg.CORSAllowedOrigins,
CORSAllowedMethods: cfg.CORSAllowedMethods,
CORSAllowedHeaders: cfg.CORSAllowedHeaders,
CORSExposedHeaders: cfg.CORSExposedHeaders,
CORSAllowCredentials: cfg.CORSAllowCredentials,
CORSMaxAge: cfg.CORSMaxAge.String(),
}
if cfg.ID != "" {
jcfg.ID = peer.Encode(cfg.ID)
}
if cfg.PrivateKey != nil {
pkeyBytes, err := crypto.MarshalPrivateKey(cfg.PrivateKey)
if err == nil {
pKey := base64.StdEncoding.EncodeToString(pkeyBytes)
jcfg.PrivateKey = pKey
}
}
if len(libp2pAddresses) > 0 {
jcfg.Libp2pListenMultiaddress = libp2pAddresses
}
return
}
// CorsOptions returns cors.Options setup from the configured values.
func (cfg *Config) CorsOptions() *cors.Options {
maxAgeSeconds := int(cfg.CORSMaxAge / time.Second)
return &cors.Options{
AllowedOrigins: cfg.CORSAllowedOrigins,
AllowedMethods: cfg.CORSAllowedMethods,
AllowedHeaders: cfg.CORSAllowedHeaders,
ExposedHeaders: cfg.CORSExposedHeaders,
AllowCredentials: cfg.CORSAllowCredentials,
MaxAge: maxAgeSeconds,
Debug: false,
}
}
// ToDisplayJSON returns JSON config as a string.
func (cfg *Config) ToDisplayJSON() ([]byte, error) {
jcfg, err := cfg.toJSONConfig()
if err != nil {
return nil, err
}
return config.DisplayJSON(jcfg)
}
// LogWriter returns a writer to write logs to. If a log path is configured,
// it creates a file. Otherwise, uses the given logger.
func (cfg *Config) LogWriter() (io.Writer, error) {
if cfg.HTTPLogFile != "" {
f, err := os.OpenFile(cfg.GetHTTPLogPath(), os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
return nil, err
}
return f, nil
}
return logWriter{
logger: cfg.RequestLogger,
}, nil
}
func newTLSConfig(certFile, keyFile string) (*tls.Config, error) {
cert, err := tls.LoadX509KeyPair(certFile, keyFile)
if err != nil {
return nil, errors.New("Error loading TLS certficate/key: " + err.Error())
}
// based on https://github.com/denji/golang-tls
return &tls.Config{
MinVersion: tls.VersionTLS12,
CurvePreferences: []tls.CurveID{tls.CurveP521, tls.CurveP384, tls.CurveP256},
PreferServerCipherSuites: true,
CipherSuites: []uint16{
tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
tls.TLS_RSA_WITH_AES_256_GCM_SHA384,
tls.TLS_RSA_WITH_AES_256_CBC_SHA,
},
Certificates: []tls.Certificate{cert},
}, nil
}