Exemplo n.º 1
0
func newProxy(cfg *config.Config) *proxy.Proxy {
	if err := route.SetPickerStrategy(cfg.Proxy.Strategy); err != nil {
		log.Fatal("[FATAL] ", err)
	}
	log.Printf("[INFO] Using routing strategy %q", cfg.Proxy.Strategy)

	tr := &http.Transport{
		ResponseHeaderTimeout: cfg.Proxy.ResponseHeaderTimeout,
		MaxIdleConnsPerHost:   cfg.Proxy.MaxConn,
		Dial: (&net.Dialer{
			Timeout:   cfg.Proxy.DialTimeout,
			KeepAlive: cfg.Proxy.KeepAliveTimeout,
		}).Dial,
	}

	return proxy.New(tr, cfg.Proxy)
}
Exemplo n.º 2
0
/**
  使用配置信息创建并返回HTTP代理服务器的句柄
*/
func newHTTPProxy(cfg *config.Config) http.Handler {
	// 设置路由拣选策略
	if err := route.SetPickerStrategy(cfg.Proxy.Strategy); err != nil {
		exit.Fatal("[FATAL] ", err)
	}
	log.Printf("[INFO] Using routing strategy %q", cfg.Proxy.Strategy)

	// 设置路由匹配器
	if err := route.SetMatcher(cfg.Proxy.Matcher); err != nil {
		exit.Fatal("[FATAL] ", err)
	}
	log.Printf("[INFO] Using routing matching %q", cfg.Proxy.Matcher)

	// 配置转换器
	tr := &http.Transport{
		ResponseHeaderTimeout: cfg.Proxy.ResponseHeaderTimeout,
		MaxIdleConnsPerHost:   cfg.Proxy.MaxConn,
		Dial: (&net.Dialer{
			Timeout:   cfg.Proxy.DialTimeout,
			KeepAlive: cfg.Proxy.KeepAliveTimeout,
		}).Dial,
	}
	/**
	@todo 上面代码中有疑问,如下代码:

	Dial: (&net.Dialer{
		Timeout:   cfg.Proxy.DialTimeout,
		KeepAlive: cfg.Proxy.KeepAliveTimeout,
	}).Dial

	第一行为何用 &net.Dialer ? 即为何使用引用?
	原因是 net包的Dialer结构体(struct)的方法Dial是指针类型,所以只有使用引用定义的时候才能访问到该函数
	*/

	// 生成并返回HTTP代理句柄
	return proxy.NewHTTPProxy(tr, cfg.Proxy)
}
Exemplo n.º 3
0
func main() {
	var cfg string
	var v bool
	flag.StringVar(&cfg, "cfg", "", "path to config file")
	flag.BoolVar(&v, "v", false, "show version")
	flag.Parse()

	if v {
		fmt.Println(version)
		return
	}

	log.Printf("[INFO] Version %s starting", version)

	if cfg != "" {
		if err := loadConfig(cfg); err != nil {
			log.Fatal("[FATAL] ", err)
		}
	}

	if err := metrics.Init(metricsTarget, metricsPrefix, metricsInterval, metricsGraphiteAddr); err != nil {
		log.Fatal("[FATAL] ", err)
	}

	if os.Getenv("GOMAXPROCS") == "" {
		log.Print("[INFO] Setting GOMAXPROCS=", gomaxprocs)
		runtime.GOMAXPROCS(gomaxprocs)
	} else {
		log.Print("[INFO] Using GOMAXPROCS=", os.Getenv("GOMAXPROCS"), " from env")
	}

	if os.Getenv("GOGC") == "" {
		log.Print("[INFO] Setting GOGC=", gogc)
		debug.SetGCPercent(gogc)
	} else {
		log.Print("[INFO] Using GOGC=", os.Getenv("GOGC"), " from env")
	}

	if proxyRoutes == "" {
		useDynamicRoutes()
	} else {
		useStaticRoutes()
	}

	if err := route.SetPickerStrategy(proxyStrategy); err != nil {
		log.Fatal("[FATAL] ", err)
	}

	consul.Addr = consulAddr
	consul.URL = consulURL

	dc, err := consul.Datacenter()
	if err != nil {
		log.Fatal("[FATAL] ", err)
	}

	log.Printf("[INFO] Using routing strategy %q", proxyStrategy)
	log.Printf("[INFO] Connecting to consul on %q in datacenter %q", consulAddr, dc)
	log.Printf("[INFO] Consul can be reached via %q", consulURL)

	log.Printf("[INFO] UI listening on %q", uiAddr)
	go func() {
		if err := ui.Start(uiAddr, consulKVPath); err != nil {
			log.Fatal("[FATAL] ui: ", err)
		}
	}()

	tr := &http.Transport{
		ResponseHeaderTimeout: proxyTimeout,
		MaxIdleConnsPerHost:   proxyMaxConn,
		Dial: (&net.Dialer{
			Timeout:   proxyDialTimeout,
			KeepAlive: proxyTimeout,
		}).Dial,
	}

	proxy := route.NewProxy(tr, proxyHeaderClientIP, proxyHeaderTLS, proxyHeaderTLSValue)
	listen(proxyAddr, proxyShutdownWait, proxy)
}