forked from zeromicro/go-zero
/
tokenparser.go
121 lines (101 loc) · 2.33 KB
/
tokenparser.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
package token
import (
"net/http"
"sync"
"sync/atomic"
"time"
"github.com/dgrijalva/jwt-go"
"github.com/dgrijalva/jwt-go/request"
"github.com/brucewang585/go-zero/core/timex"
)
const claimHistoryResetDuration = time.Hour * 24
type (
ParseOption func(parser *TokenParser)
TokenParser struct {
resetTime time.Duration
resetDuration time.Duration
history sync.Map
}
)
func NewTokenParser(opts ...ParseOption) *TokenParser {
parser := &TokenParser{
resetTime: timex.Now(),
resetDuration: claimHistoryResetDuration,
}
for _, opt := range opts {
opt(parser)
}
return parser
}
func (tp *TokenParser) ParseToken(r *http.Request, secret, prevSecret string) (*jwt.Token, error) {
var token *jwt.Token
var err error
if len(prevSecret) > 0 {
count := tp.loadCount(secret)
prevCount := tp.loadCount(prevSecret)
var first, second string
if count > prevCount {
first = secret
second = prevSecret
} else {
first = prevSecret
second = secret
}
token, err = tp.doParseToken(r, first)
if err != nil {
token, err = tp.doParseToken(r, second)
if err != nil {
return nil, err
} else {
tp.incrementCount(second)
}
} else {
tp.incrementCount(first)
}
} else {
token, err = tp.doParseToken(r, secret)
if err != nil {
return nil, err
}
}
return token, nil
}
func (tp *TokenParser) doParseToken(r *http.Request, secret string) (*jwt.Token, error) {
return request.ParseFromRequest(r, request.AuthorizationHeaderExtractor,
func(token *jwt.Token) (interface{}, error) {
return []byte(secret), nil
}, request.WithParser(newParser()))
}
func (tp *TokenParser) incrementCount(secret string) {
now := timex.Now()
if tp.resetTime+tp.resetDuration < now {
tp.history.Range(func(key, value interface{}) bool {
tp.history.Delete(key)
return true
})
}
value, ok := tp.history.Load(secret)
if ok {
atomic.AddUint64(value.(*uint64), 1)
} else {
var count uint64 = 1
tp.history.Store(secret, &count)
}
}
func (tp *TokenParser) loadCount(secret string) uint64 {
value, ok := tp.history.Load(secret)
if ok {
return *value.(*uint64)
}
return 0
}
func WithResetDuration(duration time.Duration) ParseOption {
return func(parser *TokenParser) {
parser.resetDuration = duration
}
}
func newParser() *jwt.Parser {
return &jwt.Parser{
UseJSONNumber: true,
}
}