-
Notifications
You must be signed in to change notification settings - Fork 1.8k
/
args.go
588 lines (517 loc) · 13.1 KB
/
args.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
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
package fasthttp
import (
"bytes"
"errors"
"io"
"sort"
"sync"
"github.com/valyala/bytebufferpool"
)
const (
argsNoValue = true
argsHasValue = false
)
// AcquireArgs returns an empty Args object from the pool.
//
// The returned Args may be returned to the pool with ReleaseArgs
// when no longer needed. This allows reducing GC load.
func AcquireArgs() *Args {
return argsPool.Get().(*Args)
}
// ReleaseArgs returns the object acquired via AcquireArgs to the pool.
//
// Do not access the released Args object, otherwise data races may occur.
func ReleaseArgs(a *Args) {
a.Reset()
argsPool.Put(a)
}
var argsPool = &sync.Pool{
New: func() interface{} {
return &Args{}
},
}
// Args represents query arguments.
//
// It is forbidden copying Args instances. Create new instances instead
// and use CopyTo().
//
// Args instance MUST NOT be used from concurrently running goroutines.
type Args struct {
noCopy noCopy //nolint:unused,structcheck
args []argsKV
buf []byte
}
type argsKV struct {
key []byte
value []byte
noValue bool
}
// Reset clears query args.
func (a *Args) Reset() {
a.args = a.args[:0]
}
// CopyTo copies all args to dst.
func (a *Args) CopyTo(dst *Args) {
dst.Reset()
dst.args = copyArgs(dst.args, a.args)
}
// VisitAll calls f for each existing arg.
//
// f must not retain references to key and value after returning.
// Make key and/or value copies if you need storing them after returning.
func (a *Args) VisitAll(f func(key, value []byte)) {
visitArgs(a.args, f)
}
// Len returns the number of query args.
func (a *Args) Len() int {
return len(a.args)
}
// Parse parses the given string containing query args.
func (a *Args) Parse(s string) {
a.buf = append(a.buf[:0], s...)
a.ParseBytes(a.buf)
}
// ParseBytes parses the given b containing query args.
func (a *Args) ParseBytes(b []byte) {
a.Reset()
var s argsScanner
s.b = b
var kv *argsKV
a.args, kv = allocArg(a.args)
for s.next(kv) {
if len(kv.key) > 0 || len(kv.value) > 0 {
a.args, kv = allocArg(a.args)
}
}
a.args = releaseArg(a.args)
}
// String returns string representation of query args.
func (a *Args) String() string {
return string(a.QueryString())
}
// QueryString returns query string for the args.
//
// The returned value is valid until the next call to Args methods.
func (a *Args) QueryString() []byte {
a.buf = a.AppendBytes(a.buf[:0])
return a.buf
}
// Sort sorts Args by key and then value using 'f' as comparison function.
//
// For example args.Sort(bytes.Compare)
func (a *Args) Sort(f func(x, y []byte) int) {
sort.SliceStable(a.args, func(i, j int) bool {
n := f(a.args[i].key, a.args[j].key)
if n == 0 {
return f(a.args[i].value, a.args[j].value) == -1
}
return n == -1
})
}
// AppendBytes appends query string to dst and returns the extended dst.
func (a *Args) AppendBytes(dst []byte) []byte {
for i, n := 0, len(a.args); i < n; i++ {
kv := &a.args[i]
dst = AppendQuotedArg(dst, kv.key)
if !kv.noValue {
dst = append(dst, '=')
if len(kv.value) > 0 {
dst = AppendQuotedArg(dst, kv.value)
}
}
if i+1 < n {
dst = append(dst, '&')
}
}
return dst
}
// WriteTo writes query string to w.
//
// WriteTo implements io.WriterTo interface.
func (a *Args) WriteTo(w io.Writer) (int64, error) {
n, err := w.Write(a.QueryString())
return int64(n), err
}
// Del deletes argument with the given key from query args.
func (a *Args) Del(key string) {
a.args = delAllArgs(a.args, key)
}
// DelBytes deletes argument with the given key from query args.
func (a *Args) DelBytes(key []byte) {
a.args = delAllArgs(a.args, b2s(key))
}
// Add adds 'key=value' argument.
//
// Multiple values for the same key may be added.
func (a *Args) Add(key, value string) {
a.args = appendArg(a.args, key, value, argsHasValue)
}
// AddBytesK adds 'key=value' argument.
//
// Multiple values for the same key may be added.
func (a *Args) AddBytesK(key []byte, value string) {
a.args = appendArg(a.args, b2s(key), value, argsHasValue)
}
// AddBytesV adds 'key=value' argument.
//
// Multiple values for the same key may be added.
func (a *Args) AddBytesV(key string, value []byte) {
a.args = appendArg(a.args, key, b2s(value), argsHasValue)
}
// AddBytesKV adds 'key=value' argument.
//
// Multiple values for the same key may be added.
func (a *Args) AddBytesKV(key, value []byte) {
a.args = appendArg(a.args, b2s(key), b2s(value), argsHasValue)
}
// AddNoValue adds only 'key' as argument without the '='.
//
// Multiple values for the same key may be added.
func (a *Args) AddNoValue(key string) {
a.args = appendArg(a.args, key, "", argsNoValue)
}
// AddBytesKNoValue adds only 'key' as argument without the '='.
//
// Multiple values for the same key may be added.
func (a *Args) AddBytesKNoValue(key []byte) {
a.args = appendArg(a.args, b2s(key), "", argsNoValue)
}
// Set sets 'key=value' argument.
func (a *Args) Set(key, value string) {
a.args = setArg(a.args, key, value, argsHasValue)
}
// SetBytesK sets 'key=value' argument.
func (a *Args) SetBytesK(key []byte, value string) {
a.args = setArg(a.args, b2s(key), value, argsHasValue)
}
// SetBytesV sets 'key=value' argument.
func (a *Args) SetBytesV(key string, value []byte) {
a.args = setArg(a.args, key, b2s(value), argsHasValue)
}
// SetBytesKV sets 'key=value' argument.
func (a *Args) SetBytesKV(key, value []byte) {
a.args = setArgBytes(a.args, key, value, argsHasValue)
}
// SetNoValue sets only 'key' as argument without the '='.
//
// Only key in argumemt, like key1&key2
func (a *Args) SetNoValue(key string) {
a.args = setArg(a.args, key, "", argsNoValue)
}
// SetBytesKNoValue sets 'key' argument.
func (a *Args) SetBytesKNoValue(key []byte) {
a.args = setArg(a.args, b2s(key), "", argsNoValue)
}
// Peek returns query arg value for the given key.
//
// Returned value is valid until the next Args call.
func (a *Args) Peek(key string) []byte {
return peekArgStr(a.args, key)
}
// PeekBytes returns query arg value for the given key.
//
// Returned value is valid until the next Args call.
func (a *Args) PeekBytes(key []byte) []byte {
return peekArgBytes(a.args, key)
}
// PeekMulti returns all the arg values for the given key.
func (a *Args) PeekMulti(key string) [][]byte {
var values [][]byte
a.VisitAll(func(k, v []byte) {
if string(k) == key {
values = append(values, v)
}
})
return values
}
// PeekMultiBytes returns all the arg values for the given key.
func (a *Args) PeekMultiBytes(key []byte) [][]byte {
return a.PeekMulti(b2s(key))
}
// Has returns true if the given key exists in Args.
func (a *Args) Has(key string) bool {
return hasArg(a.args, key)
}
// HasBytes returns true if the given key exists in Args.
func (a *Args) HasBytes(key []byte) bool {
return hasArg(a.args, b2s(key))
}
// ErrNoArgValue is returned when Args value with the given key is missing.
var ErrNoArgValue = errors.New("no Args value for the given key")
// GetUint returns uint value for the given key.
func (a *Args) GetUint(key string) (int, error) {
value := a.Peek(key)
if len(value) == 0 {
return -1, ErrNoArgValue
}
return ParseUint(value)
}
// SetUint sets uint value for the given key.
func (a *Args) SetUint(key string, value int) {
bb := bytebufferpool.Get()
bb.B = AppendUint(bb.B[:0], value)
a.SetBytesV(key, bb.B)
bytebufferpool.Put(bb)
}
// SetUintBytes sets uint value for the given key.
func (a *Args) SetUintBytes(key []byte, value int) {
a.SetUint(b2s(key), value)
}
// GetUintOrZero returns uint value for the given key.
//
// Zero (0) is returned on error.
func (a *Args) GetUintOrZero(key string) int {
n, err := a.GetUint(key)
if err != nil {
n = 0
}
return n
}
// GetUfloat returns ufloat value for the given key.
func (a *Args) GetUfloat(key string) (float64, error) {
value := a.Peek(key)
if len(value) == 0 {
return -1, ErrNoArgValue
}
return ParseUfloat(value)
}
// GetUfloatOrZero returns ufloat value for the given key.
//
// Zero (0) is returned on error.
func (a *Args) GetUfloatOrZero(key string) float64 {
f, err := a.GetUfloat(key)
if err != nil {
f = 0
}
return f
}
// GetBool returns boolean value for the given key.
//
// true is returned for "1", "t", "T", "true", "TRUE", "True", "y", "yes", "Y", "YES", "Yes",
// otherwise false is returned.
func (a *Args) GetBool(key string) bool {
switch b2s(a.Peek(key)) {
// Support the same true cases as strconv.ParseBool
// See: https://github.com/golang/go/blob/4e1b11e2c9bdb0ddea1141eed487be1a626ff5be/src/strconv/atob.go#L12
// and Y and Yes versions.
case "1", "t", "T", "true", "TRUE", "True", "y", "yes", "Y", "YES", "Yes":
return true
default:
return false
}
}
func visitArgs(args []argsKV, f func(k, v []byte)) {
for i, n := 0, len(args); i < n; i++ {
kv := &args[i]
f(kv.key, kv.value)
}
}
func copyArgs(dst, src []argsKV) []argsKV {
if cap(dst) < len(src) {
tmp := make([]argsKV, len(src))
copy(tmp, dst)
dst = tmp
}
n := len(src)
dst = dst[:n]
for i := 0; i < n; i++ {
dstKV := &dst[i]
srcKV := &src[i]
dstKV.key = append(dstKV.key[:0], srcKV.key...)
if srcKV.noValue {
dstKV.value = dstKV.value[:0]
} else {
dstKV.value = append(dstKV.value[:0], srcKV.value...)
}
dstKV.noValue = srcKV.noValue
}
return dst
}
func delAllArgsBytes(args []argsKV, key []byte) []argsKV {
return delAllArgs(args, b2s(key))
}
func delAllArgs(args []argsKV, key string) []argsKV {
for i, n := 0, len(args); i < n; i++ {
kv := &args[i]
if key == string(kv.key) {
tmp := *kv
copy(args[i:], args[i+1:])
n--
args[n] = tmp
args = args[:n]
}
}
return args
}
func setArgBytes(h []argsKV, key, value []byte, noValue bool) []argsKV {
return setArg(h, b2s(key), b2s(value), noValue)
}
func setArg(h []argsKV, key, value string, noValue bool) []argsKV {
n := len(h)
for i := 0; i < n; i++ {
kv := &h[i]
if key == string(kv.key) {
if noValue {
kv.value = kv.value[:0]
} else {
kv.value = append(kv.value[:0], value...)
}
kv.noValue = noValue
return h
}
}
return appendArg(h, key, value, noValue)
}
func appendArgBytes(h []argsKV, key, value []byte, noValue bool) []argsKV {
return appendArg(h, b2s(key), b2s(value), noValue)
}
func appendArg(args []argsKV, key, value string, noValue bool) []argsKV {
var kv *argsKV
args, kv = allocArg(args)
kv.key = append(kv.key[:0], key...)
if noValue {
kv.value = kv.value[:0]
} else {
kv.value = append(kv.value[:0], value...)
}
kv.noValue = noValue
return args
}
func allocArg(h []argsKV) ([]argsKV, *argsKV) {
n := len(h)
if cap(h) > n {
h = h[:n+1]
} else {
h = append(h, argsKV{})
}
return h, &h[n]
}
func releaseArg(h []argsKV) []argsKV {
return h[:len(h)-1]
}
func hasArg(h []argsKV, key string) bool {
for i, n := 0, len(h); i < n; i++ {
kv := &h[i]
if key == string(kv.key) {
return true
}
}
return false
}
func peekArgBytes(h []argsKV, k []byte) []byte {
for i, n := 0, len(h); i < n; i++ {
kv := &h[i]
if bytes.Equal(kv.key, k) {
return kv.value
}
}
return nil
}
func peekArgStr(h []argsKV, k string) []byte {
for i, n := 0, len(h); i < n; i++ {
kv := &h[i]
if string(kv.key) == k {
return kv.value
}
}
return nil
}
type argsScanner struct {
b []byte
}
func (s *argsScanner) next(kv *argsKV) bool {
if len(s.b) == 0 {
return false
}
kv.noValue = argsHasValue
isKey := true
k := 0
for i, c := range s.b {
switch c {
case '=':
if isKey {
isKey = false
kv.key = decodeArgAppend(kv.key[:0], s.b[:i])
k = i + 1
}
case '&':
if isKey {
kv.key = decodeArgAppend(kv.key[:0], s.b[:i])
kv.value = kv.value[:0]
kv.noValue = argsNoValue
} else {
kv.value = decodeArgAppend(kv.value[:0], s.b[k:i])
}
s.b = s.b[i+1:]
return true
}
}
if isKey {
kv.key = decodeArgAppend(kv.key[:0], s.b)
kv.value = kv.value[:0]
kv.noValue = argsNoValue
} else {
kv.value = decodeArgAppend(kv.value[:0], s.b[k:])
}
s.b = s.b[len(s.b):]
return true
}
func decodeArgAppend(dst, src []byte) []byte {
if bytes.IndexByte(src, '%') < 0 && bytes.IndexByte(src, '+') < 0 {
// fast path: src doesn't contain encoded chars
return append(dst, src...)
}
// slow path
for i := 0; i < len(src); i++ {
c := src[i]
if c == '%' {
if i+2 >= len(src) {
return append(dst, src[i:]...)
}
x2 := hex2intTable[src[i+2]]
x1 := hex2intTable[src[i+1]]
if x1 == 16 || x2 == 16 {
dst = append(dst, '%')
} else {
dst = append(dst, x1<<4|x2)
i += 2
}
} else if c == '+' {
dst = append(dst, ' ')
} else {
dst = append(dst, c)
}
}
return dst
}
// decodeArgAppendNoPlus is almost identical to decodeArgAppend, but it doesn't
// substitute '+' with ' '.
//
// The function is copy-pasted from decodeArgAppend due to the performance
// reasons only.
func decodeArgAppendNoPlus(dst, src []byte) []byte {
if bytes.IndexByte(src, '%') < 0 {
// fast path: src doesn't contain encoded chars
return append(dst, src...)
}
// slow path
for i := 0; i < len(src); i++ {
c := src[i]
if c == '%' {
if i+2 >= len(src) {
return append(dst, src[i:]...)
}
x2 := hex2intTable[src[i+2]]
x1 := hex2intTable[src[i+1]]
if x1 == 16 || x2 == 16 {
dst = append(dst, '%')
} else {
dst = append(dst, x1<<4|x2)
i += 2
}
} else {
dst = append(dst, c)
}
}
return dst
}