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
|
// Copyright (c) 2021 Tulir Asokan
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
package whatsmeow
import (
"context"
"strconv"
"sync/atomic"
"time"
waBinary "go.mau.fi/whatsmeow/binary"
"go.mau.fi/whatsmeow/types"
)
func (cli *Client) generateRequestID() string {
return cli.uniqueID + strconv.FormatUint(uint64(atomic.AddUint32(&cli.idCounter, 1)), 10)
}
var closedNode = &waBinary.Node{Tag: "xmlstreamend"}
func (cli *Client) clearResponseWaiters() {
cli.responseWaitersLock.Lock()
for _, waiter := range cli.responseWaiters {
select {
case waiter <- closedNode:
default:
close(waiter)
}
}
cli.responseWaiters = make(map[string]chan<- *waBinary.Node)
cli.responseWaitersLock.Unlock()
}
func (cli *Client) waitResponse(reqID string) chan *waBinary.Node {
ch := make(chan *waBinary.Node, 1)
cli.responseWaitersLock.Lock()
cli.responseWaiters[reqID] = ch
cli.responseWaitersLock.Unlock()
return ch
}
func (cli *Client) cancelResponse(reqID string, ch chan *waBinary.Node) {
cli.responseWaitersLock.Lock()
close(ch)
delete(cli.responseWaiters, reqID)
cli.responseWaitersLock.Unlock()
}
func (cli *Client) receiveResponse(data *waBinary.Node) bool {
id, ok := data.Attrs["id"].(string)
if !ok || (data.Tag != "iq" && data.Tag != "ack") {
return false
}
cli.responseWaitersLock.Lock()
waiter, ok := cli.responseWaiters[id]
if !ok {
cli.responseWaitersLock.Unlock()
return false
}
delete(cli.responseWaiters, id)
cli.responseWaitersLock.Unlock()
waiter <- data
return true
}
type infoQueryType string
const (
iqSet infoQueryType = "set"
iqGet infoQueryType = "get"
)
type infoQuery struct {
Namespace string
Type infoQueryType
To types.JID
ID string
Content interface{}
Timeout time.Duration
Context context.Context
}
func (cli *Client) sendIQAsync(query infoQuery) (<-chan *waBinary.Node, error) {
if len(query.ID) == 0 {
query.ID = cli.generateRequestID()
}
waiter := cli.waitResponse(query.ID)
attrs := waBinary.Attrs{
"id": query.ID,
"xmlns": query.Namespace,
"type": string(query.Type),
}
if !query.To.IsEmpty() {
attrs["to"] = query.To
}
err := cli.sendNode(waBinary.Node{
Tag: "iq",
Attrs: attrs,
Content: query.Content,
})
if err != nil {
cli.cancelResponse(query.ID, waiter)
return nil, err
}
return waiter, nil
}
func (cli *Client) sendIQ(query infoQuery) (*waBinary.Node, error) {
resChan, err := cli.sendIQAsync(query)
if err != nil {
return nil, err
}
if query.Timeout == 0 {
query.Timeout = 1 * time.Minute
}
if query.Context == nil {
query.Context = context.Background()
}
select {
case res := <-resChan:
if res == closedNode {
return nil, ErrIQDisconnected
}
resType, _ := res.Attrs["type"].(string)
if res.Tag != "iq" || (resType != "result" && resType != "error") {
return res, &IQError{RawNode: res}
} else if resType == "error" {
return res, parseIQError(res)
}
return res, nil
case <-query.Context.Done():
return nil, query.Context.Err()
case <-time.After(query.Timeout):
return nil, ErrIQTimedOut
}
}
|
