Golang Conn.LocalAddr方法代码示例

// Handles a new http connection from the public internet
func httpHandler(c conn.Conn, proto string) {
	defer c.Close()
	defer func() {
		// recover from failures
		if r := recover(); r != nil {
			c.Warn("httpHandler failed with error %v", r)
		}
	}()

	// Make sure we detect dead connections while we decide how to multiplex
	c.SetDeadline(time.Now().Add(connReadTimeout))

	// multiplex by extracting the Host header, the vhost library
	vhostConn, err := vhost.HTTP(c)
	if err != nil {
		c.Warn("Failed to read valid %s request: %v", proto, err)
		c.Write([]byte(BadRequest))
		return
	}

	// read out the Host header and auth from the request
	host := strings.ToLower(vhostConn.Host())
	auth := vhostConn.Request.Header.Get("Authorization")
	hostname, _, err := net.SplitHostPort(host)
	if err != nil {
		hostname = host
	} else {
		_, port, _ := net.SplitHostPort(c.LocalAddr().String())
		hostname = fmt.Sprintf("%s:%s", hostname, port)
	}
	paramSubdomain := vhostConn.Request.URL.Query().Get(SubDomainParamName) //url param

	if paramSubdomain == "" { //user-agent
		reg := regexp.MustCompile(fmt.Sprintf("%s/(\\w+)", SubDomainUserAgentName))
		matches := reg.FindStringSubmatch(vhostConn.Request.UserAgent())
		if len(matches) > 0 {
			paramSubdomain = matches[1]
		}
	}
	_, setCookieSubdomain := vhostConn.Request.URL.Query()[SetCookieSubDomainParamName]
	subdomainCookie, err := vhostConn.Request.Cookie(SubDomainCookieName)
	cookieSubdomain := ""
	if err == nil {
		cookieSubdomain = subdomainCookie.Value
	}

	// done reading mux data, free up the request memory
	vhostConn.Free()

	// We need to read from the vhost conn now since it mucked around reading the stream
	c = conn.Wrap(vhostConn, "pub")

	// multiplex to find the right backend host
	c.Debug("Found hostname %s in request", host)

	if paramSubdomain != "" {
		hostname = fmt.Sprintf("%s.%s", paramSubdomain, hostname)
	} else if cookieSubdomain != "" {
		hostname = fmt.Sprintf("%s.%s", cookieSubdomain, hostname)
	}

	tunnelKey := fmt.Sprintf("%s://%s", proto, hostname)

	tunnel := tunnelRegistry.Get(tunnelKey)
	if tunnel == nil {
		if setCookieSubdomain && paramSubdomain != "" {
			c.Info("Set %s to Cookie for hostname %s", paramSubdomain, tunnelKey)
			c.Write([]byte(fmt.Sprintf(SetCooikeResponse, len(proto)+len(hostname)+len(paramSubdomain)+48, SubDomainCookieName, paramSubdomain, proto, hostname, paramSubdomain)))
		} else {
			c.Info("No tunnel found for hostname %s", tunnelKey)
			c.Write([]byte(fmt.Sprintf(NotFound, len(hostname)+18, hostname)))
		}
		return
	}

	// If the client specified http auth and it doesn't match this request's auth
	// then fail the request with 401 Not Authorized and request the client reissue the
	// request with basic authdeny the request
	if tunnel.req.HttpAuth != "" && auth != tunnel.req.HttpAuth {
		c.Info("Authentication failed: %s", auth)
		c.Write([]byte(NotAuthorized))
		return
	}

	// dead connections will now be handled by tunnel heartbeating and the client
	c.SetDeadline(time.Time{})

	// let the tunnel handle the connection now
	tunnel.HandlePublicConnection(c)
}