Example #1
0
func (mon *Monitor) report(url *http.URL, every int64) {
	i := 0
	for {
		// Sleep between updates
		if i > 0 {
			time.Sleep(every)
		}
		i++

		// Prepare HTTP request
		jj, err := mon.dumper.MarshalJSON()
		if err != nil {
			continue
		}
		//printJSON(jj)

		repbuf, err := EncodeReport(jj, mon.key)
		if err != nil {
			continue
		}
		bodylen, body := http.BytesToBody(repbuf)

		req := &http.Request{
			Method:        "POST",
			URL:           url,
			Body:          body,
			ContentLength: int64(bodylen),
			Close:         true,
			UserAgent:     sys.Name + "-Client-Monitor",
		}

		// Connect
		conn, err := net.Dial("tcp", "", url.Host)
		if err != nil {
			if conn != nil {
				conn.Close()
			}
			continue
		}
		cc := http.NewClientConn(conn, nil)

		// Send request
		wch := make(chan int, 1)
		req.Body = http.NewRunOnClose(req.Body, func() { wch <- 1 })
		err = cc.Write(req)
		if err != nil {
			cc.Close()
			conn.Close()
		} else {
			<-wch // wait until the request has been sent
			cc.Close()
			conn.Close()
		}
	}
}
Example #2
0
func askForGreenLight() bool {
	url, err := http.ParseURL(sys.TangraServerURL)
	if err != nil {
		panic("tangra, bad URL")
	}
	req := &http.Request{
		Method:    "GET",
		URL:       url,
		Close:     true,
		UserAgent: sys.Name + "-Client-Tangra",
	}
	req.Header = make(map[string]string)
	req.Header["Tonika-Build"] = sys.Build
	req.Header["Tonika-Released"] = sys.Released

	// Connect
	conn, err := net.Dial("tcp", "", url.Host)
	if err != nil {
		if conn != nil {
			conn.Close()
		}
		return true
	}
	cc := http.NewClientConn(conn, nil)

	// Send request
	err = cc.Write(req)
	if err != nil {
		cc.Close()
		conn.Close()
		return true
	}
	resp, err := cc.Read()
	if err != nil {
		cc.Close()
		conn.Close()
		return true
	}
	cc.Close()
	conn.Close()

	if resp.Header == nil {
		return true
	}
	green, ok := resp.Header["Green"]
	if !ok {
		return true
	}
	green = strings.TrimSpace(green)
	if green == "Halt" {
		return false
	}
	return true
}