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
package xrpc
import (
"encoding/json"
"fmt"
"net/http"
"strconv"
"strings"
"time"
)
const errorDetailLimit = 300
type Error struct {
Status int
Name string
Message string
Body []byte
Wait time.Duration
verdict Verdict
}
func (e *Error) RetryAfter() time.Duration { return e.Wait }
func retryAfter(status int, h http.Header, now time.Time) time.Duration {
if raw := strings.TrimSpace(h.Get("Retry-After")); raw != "" {
if s, err := strconv.ParseInt(raw, 10, 64); err == nil && s > 0 {
return time.Duration(s) * time.Second
}
if at, err := http.ParseTime(raw); err == nil && at.After(now) {
return at.Sub(now)
}
}
if raw := strings.TrimSpace(h.Get("Ratelimit-Reset")); raw != "" && status == http.StatusTooManyRequests {
if s, err := strconv.ParseInt(raw, 10, 64); err == nil {
if at := time.Unix(s, 0); at.After(now) {
return at.Sub(now)
}
}
}
return 0
}
func (e *Error) HTTPStatus() int { return e.Status }
func newError(status int, body []byte) *Error {
out := &Error{Status: status, Body: body}
var payload struct {
Error string `json:"error"`
Message string `json:"message"`
}
if json.Unmarshal(body, &payload) == nil {
out.Name = strings.TrimSpace(payload.Error)
out.Message = strings.TrimSpace(payload.Message)
}
return out
}
func (e *Error) Detail() string {
switch {
case e.Name != "" && e.Message != "":
return e.Name + ": " + e.Message
case e.Name != "":
return e.Name
case e.Message != "":
return e.Message
}
text := strings.TrimSpace(string(e.Body))
if len(text) > errorDetailLimit {
text = text[:errorDetailLimit] + "..."
}
return text
}
func (e *Error) Error() string {
if detail := e.Detail(); detail != "" {
return fmt.Sprintf("HTTP %d: %s", e.Status, detail)
}
return fmt.Sprintf("HTTP %d", e.Status)
}
