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
|
/******************************************************************************
*
* Copyright 2018 Stefan Majewsky <majewsky@gmx.net>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
package schwift
import (
"math"
"strconv"
"time"
)
//FieldUnixTimeReadonly is a helper type that provides type-safe access to a
//Swift header whose value is a UNIX timestamp. It cannot be directly
//constructed, but methods on the Headers types return this type. For example:
//
// //suppose you have:
// hdr, err := obj.Headers()
//
// //you could do all this:
// sec, err := strconv.ParseFloat(hdr.Get("X-Timestamp"), 64)
// time := time.Unix(int64(sec), int64(1e9 * (sec - math.Floor(sec))))
//
// //or you can just:
// time := hdr.Timestamp().Get()
//
//Don't worry about the missing `err` in the last line. When the X-Timestamp
//header fails to parse, Object.Headers() already returns the corresponding
//MalformedHeaderError.
type FieldUnixTimeReadonly struct {
h headerInterface
k string
}
//Exists checks whether there is a value for this header.
func (f FieldUnixTimeReadonly) Exists() bool {
return f.h.Get(f.k) != ""
}
//Get returns the value for this header, or the zero value if there is no value
//(or if it is not a valid timestamp).
func (f FieldUnixTimeReadonly) Get() time.Time {
v, err := strconv.ParseFloat(f.h.Get(f.k), 64)
if err != nil {
return time.Time{}
}
seconds := math.Floor(v)
return time.Unix(
int64(seconds),
int64(1e9*(v-seconds)),
)
}
func (f FieldUnixTimeReadonly) validate() error {
val := f.h.Get(f.k)
if val == "" {
return nil
}
_, err := strconv.ParseFloat(val, 64)
if err == nil {
return nil
}
return MalformedHeaderError{f.k, err}
}
|
