Function RenderCoverByBookIdentify

utils/util.go:221–253

生成

(identify string)

// 生成
func RenderCoverByBookIdentify(identify string) (err error) {
	var args []string
	shotJS := "cover.js"
	if _, err = os.Stat(shotJS); err != nil {
		err = ioutil.WriteFile(shotJS, []byte(screenshotCoverJS), os.ModePerm)
	}
	if err != nil {
		return
	}

	//使用chromium-browser
	//	chromium-browser --headless --disable-gpu --screenshot --no-sandbox --window-size=320,480 http://www.bookstack.cn
	link := "http://localhost:" + beego.AppConfig.DefaultString("httpport", "8181") + "/local-render-cover?id=" + identify
	name := "node"
	if ok := beego.AppConfig.DefaultBool("puppeteer", false); ok {
		args = []string{shotJS, "--identify", identify, "--url", link}
	} else {
		err = errors.New("请安装并启用puppeteer")
		return
	}
	cmd := exec.Command(name, args...)
	beego.Info("render cover by book id:", cmd.Args)
	// 超过30秒，杀掉进程，避免长期占用
	time.AfterFunc(httpTimeout, func() {
		if cmd.Process != nil && cmd.Process.Pid != 0 {
			cmd.Process.Kill()
		}
	})
	if err = cmd.Run(); err != nil {
		beego.Error(err)
	}
	return
}

// 使用chrome采集网页HTML
func CrawlByChrome(urlStr string, bookIdentify string) (cont string, err error) {