check: stop current check process when timeout (#159)

README.md

@@ -381,4 +381,4 @@ glider -config CONFIGPATH -listen :8080 -verbose
 
 - [conflag](https://github.com/nadoo/conflag): command line and config file parse support
 - [ArchLinux](https://www.archlinux.org/packages/community/x86_64/glider): a great linux distribution with glider pre-built package
-- [urlEncode](https://www.w3schools.com/tags/ref_urlencode.asp): you should encode special characters in your sechme. e.g: `@`->`%40`
+- [urlencode](https://www.w3schools.com/tags/ref_urlencode.asp): you should encode special characters in  scheme url. e.g: `@`->`%40`

proxy/ssh/ssh.go

@@ -49,8 +49,13 @@ func NewSSH(s string, d proxy.Dialer, p proxy.Proxy) (*SSH, error) {
 		config.Auth = []ssh.AuthMethod{ssh.Password(pass)}
 	}
 
-	if key := privateKeyFile(u.Query().Get("key")); key != nil {
-		config.Auth = append(config.Auth, key)
+	if key := u.Query().Get("key"); key != "" {
+		keyAuth, err := privateKeyAuth(key)
+		if err != nil {
+			log.F("[ssh] read key file error: %s", err)
+			return nil, err
+		}
+		config.Auth = append(config.Auth, keyAuth)
 	}
 
 	ssh := &SSH{
@@ -98,16 +103,16 @@ func (s *SSH) DialUDP(network, addr string) (pc net.PacketConn, writeTo net.Addr
 	return nil, nil, errors.New("ssh client does not support udp")
 }
 
-func privateKeyFile(file string) ssh.AuthMethod {
+func privateKeyAuth(file string) (ssh.AuthMethod, error) {
 	buffer, err := ioutil.ReadFile(file)
 	if err != nil {
-		return nil
+		return nil, err
 	}
 
 	key, err := ssh.ParsePrivateKey(buffer)
 	if err != nil {
-		return nil
+		return nil, err
 	}
 
-	return ssh.PublicKeys(key)
+	return ssh.PublicKeys(key), nil
 }

strategy/strategy.go

@@ -252,6 +252,8 @@ func checkWebSite(fwdr *Forwarder, website string, timeout time.Duration, buf []
 	}
 	defer rc.Close()
 
+	rc.SetDeadline(time.Now().Add(timeout))
+
 	_, err = rc.Write([]byte("GET / HTTP/1.0\r\n\r\n"))
 	if err != nil {
 		fwdr.Disable()