/
consumer.go
64 lines (52 loc) · 1.07 KB
/
consumer.go
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package gomb
import (
"encoding/json"
"fmt"
"github.com/gorilla/websocket"
"net/http"
"net/url"
)
type Consumer struct {
Addr string
Topic string
ID string
conn *websocket.Conn
}
func NewConsumer(p Params) (*Consumer, error) {
u := url.URL{Scheme: "ws", Host: p.Addr, Path: fmt.Sprintf("/consume/%s", p.Topic)}
conn, _, err := websocket.DefaultDialer.Dial(u.String(), http.Header{"X-Request-ID": []string{p.ID}})
if err != nil {
return nil, fmt.Errorf("failed to server with server: %w", err)
}
return &Consumer{
Addr: p.Addr,
Topic: p.Topic,
ID: p.ID,
conn: conn,
}, nil
}
func (c *Consumer) Consume() chan Message {
chMsgs := make(chan Message, 32)
go func() {
for {
t, bytes, err := c.conn.ReadMessage()
if err != nil {
return
}
if t == websocket.CloseMessage {
return
}
var msg Message
err = json.Unmarshal(bytes, &msg)
if err != nil {
continue
}
chMsgs <- msg
}
}()
return chMsgs
}
func (c *Consumer) Close() error {
c.conn.WriteMessage(websocket.CloseMessage, nil)
return c.conn.Close()
}