grafana/grafana-kiosk

package kiosk

import (
    "context"
    "log"
    "os"
    "time"

    "github.com/chromedp/chromedp"
    "github.com/chromedp/chromedp/kb"
)

// GrafanaKioskGCOM creates a chrome-based kiosk using a grafana.com authenticated account.
func GrafanaKioskGCOM(cfg *Config, messages chan string) {
    dir, err := os.MkdirTemp(os.TempDir(), "chromedp-kiosk")
    if err != nil {
        panic(err)
    }

    log.Println("Using temp dir:", dir)
    defer os.RemoveAll(dir)

    opts := generateExecutorOptions(dir, cfg)

    allocCtx, cancel := chromedp.NewExecAllocator(context.Background(), opts...)
    defer cancel()

    // also set up a custom logger
    taskCtx, cancel := chromedp.NewContext(allocCtx, chromedp.WithLogf(log.Printf))
    defer cancel()

    listenChromeEvents(taskCtx, cfg, targetCrashed)

    // ensure that the browser process is started
    if err := chromedp.Run(taskCtx); err != nil {
        panic(err)
    }
    // Give browser time to load
    log.Printf("Sleeping %d MS before navigating to url", cfg.General.PageLoadDelayMS)
    time.Sleep(time.Duration(cfg.General.PageLoadDelayMS) * time.Millisecond)

    var generatedURL = GenerateURL(cfg.Target.URL, cfg.General.Mode, cfg.General.AutoFit, cfg.Target.IsPlayList)

    log.Println("Navigating to ", generatedURL)
    /*
        Launch chrome, click the grafana.com button, fill out login form and submit
    */
    // XPATH of grafana.com login button = //*[@href="login/grafana_com"]/i
    // XPATH for grafana.com login (new) = //a[contains(@href,'login/grafana_com')]

    // chromedp.WaitVisible(`//*[@href="login/grafana_com"]/i`, chromedp.BySearch),

    // Click the grafana_com login button
    if err := chromedp.Run(taskCtx,
        chromedp.Navigate(generatedURL),
        chromedp.ActionFunc(func(context.Context) error {
            log.Println("waiting for login dialog")
            return nil
        }),
        chromedp.WaitVisible(`//a[contains(@href,'login/grafana_com')]`, chromedp.BySearch),
        chromedp.ActionFunc(func(context.Context) error {
            log.Println("gcom login dialog detected")
            return nil
        }),
        chromedp.Click(`//a[contains(@href,'login/grafana_com')]`, chromedp.BySearch),
        chromedp.ActionFunc(func(context.Context) error {
            log.Println("gcom button clicked")
            return nil
        }),
    ); err != nil {
        panic(err)
    }
    // Give browser time to load next page (this can be prone to failure, explore different options vs sleeping)
    time.Sleep(3000 * time.Millisecond)
    // Fill out grafana_com login page
    if err := chromedp.Run(taskCtx,
        chromedp.WaitVisible(`//input[@name="login"]`, chromedp.BySearch),
        chromedp.SendKeys(`//input[@name="login"]`, cfg.Target.Username, chromedp.BySearch),
        chromedp.Click(`#submit`, chromedp.ByID),
        chromedp.SendKeys(`//input[@name="password"]`, cfg.Target.Password+kb.Enter, chromedp.BySearch),
    ); err != nil {
        panic(err)
    }
    // blocking wait
    for {
        messageFromChrome := <-messages
        if err := chromedp.Run(taskCtx,
            chromedp.Navigate(generatedURL),
        ); err != nil {
            panic(err)
        }
        log.Println("Chromium output:", messageFromChrome)
    }
}