/
client.go
192 lines (170 loc) · 4.78 KB
/
client.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
// Copyright 2013 The Gorilla WebSocket Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"log"
"sync"
"time"
"github.com/google/uuid"
"github.com/gorilla/websocket"
"github.com/streadway/amqp"
)
const (
// Time allowed to write a message to the peer.
writeWait = 10 * time.Second
// Time allowed to read the next pong message from the peer.
pongWait = 60 * time.Second
// Send pings to peer with this period. Must be less than pongWait.
pingPeriod = (pongWait * 9) / 10
// Maximum message size allowed from peer.
maxMessageSize = 512
)
var (
newline = []byte{'\n'}
space = []byte{' '}
)
// Client is a middleman between the websocket connection and the hub.
type Client struct {
id string
hub *Hub
// The websocket connection.
conn *websocket.Conn
// Buffered channel of outbound messages.
send chan *Message
// RabbitMQ connection and channel
amqpMutex sync.Mutex
amqpConn *amqp.Connection
amqpChan *amqp.Channel
}
type ttsResponse struct {
Success bool `json:"success"`
AudioID string `json:"audio_id"`
Reason string `json:"reason"`
}
func (c *Client) TTS(text string) (string, error) {
c.amqpMutex.Lock()
defer c.amqpMutex.Unlock()
// start model response consumer
consumerID := uuid.New().String()
responseCh, err := c.amqpChan.Consume(
"amq.rabbitmq.reply-to", // queue
consumerID, // consumer
true, // auto-ack
false, // exclusive
false, // no-local
false, // no-wait
nil, // args
)
if err != nil {
return "", fmt.Errorf("failed to register the response consumer: %w", err)
}
defer func() {
if err := c.amqpChan.Cancel(consumerID, false); err != nil {
log.Println("failed to cancel the response consumer:", err)
}
}()
requestBody, _ := json.Marshal(struct {
Action string `json:"action"`
Text string `json:"text"`
}{
Action: "tts",
Text: text,
})
// send tts request to MQ
correlationID := uuid.New().String()
err = c.amqpChan.Publish(
"", // exchange
"ms.vox_fala", // routing key
false, // mandatory
false, // immediate
amqp.Publishing{
ContentType: "text/plain",
Body: requestBody,
DeliveryMode: amqp.Persistent,
Expiration: "60000",
CorrelationId: correlationID,
ReplyTo: "amq.rabbitmq.reply-to",
})
if err != nil {
return "", fmt.Errorf("publish message: %w", err)
}
timeoutTimer := time.NewTimer(5 * time.Minute)
defer timeoutTimer.Stop()
var responseBody []byte
select {
case d := <-responseCh:
// assert correlationID == d.CorrelationId
responseBody = d.Body
break
case <-timeoutTimer.C:
return "", errors.New("timeout")
}
var response *ttsResponse
err = json.Unmarshal(responseBody, &response)
if err != nil {
return "", fmt.Errorf("json unmarshal: %w", err)
}
return "https://vox-twitch.monique.dev/ttsPlay/" + response.AudioID, nil
}
// readPump pumps messages from the websocket connection to the hub.
//
// The application runs readPump in a per-connection goroutine. The application
// ensures that there is at most one reader on a connection by executing all
// reads from this goroutine.
func (c *Client) readPump() {
defer func() {
c.hub.unregister <- c
c.conn.Close()
}()
c.conn.SetReadLimit(maxMessageSize)
c.conn.SetReadDeadline(time.Now().Add(pongWait))
c.conn.SetPongHandler(func(string) error { c.conn.SetReadDeadline(time.Now().Add(pongWait)); return nil })
for {
_, message, err := c.conn.ReadMessage()
if err != nil {
if websocket.IsUnexpectedCloseError(err, websocket.CloseGoingAway, websocket.CloseAbnormalClosure) {
log.Printf("error: %v", err)
}
break
}
message = bytes.TrimSpace(bytes.Replace(message, newline, space, -1))
// impossibru!
log.Fatalln("unexpected message received:", string(message))
}
}
// writePump pumps messages from the hub to the websocket connection.
//
// A goroutine running writePump is started for each connection. The
// application ensures that there is at most one writer to a connection by
// executing all writes from this goroutine.
func (c *Client) writePump() {
ticker := time.NewTicker(pingPeriod)
defer func() {
ticker.Stop()
c.conn.Close()
}()
for {
select {
case message, ok := <-c.send:
c.conn.SetWriteDeadline(time.Now().Add(writeWait))
if !ok {
// The hub closed the channel.
c.conn.WriteMessage(websocket.CloseMessage, []byte{})
return
}
if err := c.conn.WriteJSON(message); err != nil {
return
}
case <-ticker.C:
c.conn.SetWriteDeadline(time.Now().Add(writeWait))
if err := c.conn.WriteMessage(websocket.PingMessage, nil); err != nil {
return
}
}
}
}