/
tradingview2.go
42 lines (38 loc) · 1.13 KB
/
tradingview2.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
// Стратегия «Три экрана Элдера» https://smart-lab.ru/blog/568328.php https://alpari.com/ru/beginner/articles/tri-ekrana-eldera/
package screenshot
import (
"context"
"log"
"time"
"github.com/chromedp/chromedp"
"github.com/chromedp/chromedp/device"
"github.com/comerc/segezha4/utils"
)
// MakeScreenshotForTradingView2 description
func MakeScreenshotForTradingView2(linkURL string) []byte {
ctx1, cancel1 := chromedp.NewContext(context.Background())
defer cancel1()
// start the browser without a timeout
if err := chromedp.Run(ctx1); err != nil {
log.Println(err)
return nil
}
const average = 18
ctx2, cancel2 := context.WithTimeout(ctx1, utils.GetTimeout(average))
defer cancel2()
var buf []byte
container := "body > div.tradingview-widget-container"
if err := chromedp.Run(ctx2, func() chromedp.Tasks {
return chromedp.Tasks{
chromedp.Emulate(device.IPadPro),
chromedp.Navigate(linkURL),
chromedp.WaitReady(container),
chromedp.Sleep(4 * time.Second),
chromedp.Screenshot(container, &buf, chromedp.NodeVisible),
}
}()); err != nil {
log.Println(err)
return nil
}
return buf
}