small refactoring

src/go-proxy/constants.go

@@ -1,6 +1,10 @@
 package main
 
-import "time"
+import (
+	"net"
+	"net/http"
+	"time"
+)
 
 var (
 	ImageNamePortMap = map[string]string{
@@ -60,6 +64,19 @@ const (
 	keyPath  = "certs/priv.key"
 )
 
+// TODO: default + per proxy
+var transport = &http.Transport{
+	Proxy: http.ProxyFromEnvironment,
+	DialContext: (&net.Dialer{
+		Timeout:   60 * time.Second,
+		KeepAlive: 60 * time.Second,
+	}).DialContext,
+	MaxIdleConns:        1000,
+	MaxIdleConnsPerHost: 1000,
+}
+
+const clientUrlFromEnv = "FROM_ENV"
+
 const configPath = "config.yml"
 
 const StreamStopListenTimeout = 1 * time.Second

src/go-proxy/docker_provider.go

@@ -63,14 +63,16 @@ func (p *Provider) getContainerProxyConfigs(container types.Container, clientHos
 		}
 		if config.Port == "" {
 			// no ports exposed or specified
+			p.Logf("Build", "no ports exposed for %s, ignored", container_name)
 			continue
 		}
 		if config.Scheme == "" {
-			if strings.HasSuffix(config.Port, "443") {
+			switch {
+			case strings.HasSuffix(config.Port, "443"):
 				config.Scheme = "https"
-			} else if strings.HasPrefix(container.Image, "sha256:") {
+			case strings.HasPrefix(container.Image, "sha256:"):
 				config.Scheme = "http"
-			} else {
+			default:
 				imageSplit := strings.Split(container.Image, "/")
 				imageSplit = strings.Split(imageSplit[len(imageSplit)-1], ":")
 				imageName := imageSplit[0]
@@ -92,8 +94,7 @@ func (p *Provider) getContainerProxyConfigs(container types.Container, clientHos
 				config.Host = clientHost
 			case container.HostConfig.NetworkMode == "host":
 				config.Host = "host.docker.internal"
-			case config.LoadBalance == "true":
+			case config.LoadBalance == "true", config.LoadBalance == "1":
-			case config.LoadBalance == "1":
 				for _, network := range container.NetworkSettings.Networks {
 					config.Host = network.IPAddress
 					break
@@ -186,4 +187,3 @@ func (p *Provider) grWatchDockerChanges() {
 }
 
 // var dockerUrlRegex = regexp.MustCompile(`^(?P<scheme>\w+)://(?P<host>[^:]+)(?P<port>:\d+)?(?P<path>/.*)?$`)
-const clientUrlFromEnv = "FROM_ENV"

src/go-proxy/file_provider.go

@@ -25,7 +25,7 @@ func (p *Provider) getFileProxyConfigs() ([]*ProxyConfig, error) {
 
 		for alias, cfg := range configMap {
 			cfg.Alias = alias
-			err = cfg.SetDefault()
+			err = cfg.SetDefaults()
 			if err != nil {
 				return nil, err
 			}

src/go-proxy/http_route.go

@@ -2,12 +2,10 @@ package main
 
 import (
 	"fmt"
-	"net"
 	"net/http"
 	"net/http/httputil"
 	"net/url"
 	"strings"
-	"time"
 
 	"github.com/golang/glog"
 )
@@ -20,15 +18,6 @@ type HTTPRoute struct {
 	Proxy    *httputil.ReverseProxy
 }
 
-func isValidProxyPathMode(mode string) bool {
-	switch mode {
-	case ProxyPathMode_Forward, ProxyPathMode_Sub, ProxyPathMode_RemovedPath:
-		return true
-	default:
-		return false
-	}
-}
-
 func NewHTTPRoute(config *ProxyConfig) (*HTTPRoute, error) {
 	url, err := url.Parse(fmt.Sprintf("%s://%s:%s", config.Scheme, config.Host, config.Port))
 	if err != nil {
@@ -124,6 +113,24 @@ func (p *httpLoadBalancePool) Pick() *HTTPRoute {
 	return p.pool[index%len(p.pool)]
 }
 
+func (r *HTTPRoute) RemoveFromRoutes() {
+	routes.HTTPRoutes.Delete(r.Alias)
+}
+
+// dummy implementation for Route interface
+func (r *HTTPRoute) SetupListen()   {}
+func (r *HTTPRoute) Listen()        {}
+func (r *HTTPRoute) StopListening() {}
+
+func isValidProxyPathMode(mode string) bool {
+	switch mode {
+	case ProxyPathMode_Forward, ProxyPathMode_Sub, ProxyPathMode_RemovedPath:
+		return true
+	default:
+		return false
+	}
+}
+
 func redirectToTLS(w http.ResponseWriter, r *http.Request) {
 	// Redirect to the same host but with HTTPS
 	var redirectCode int
@@ -158,23 +165,3 @@ func httpProxyHandler(w http.ResponseWriter, r *http.Request) {
 	}
 	route.Proxy.ServeHTTP(w, r)
 }
-
-func (r *HTTPRoute) RemoveFromRoutes() {
-	routes.HTTPRoutes.Delete(r.Alias)
-}
-
-// dummy implementation for Route interface
-func (r *HTTPRoute) SetupListen()   {}
-func (r *HTTPRoute) Listen()        {}
-func (r *HTTPRoute) StopListening() {}
-
-// TODO: default + per proxy
-var transport = &http.Transport{
-	Proxy: http.ProxyFromEnvironment,
-	DialContext: (&net.Dialer{
-		Timeout:   60 * time.Second,
-		KeepAlive: 60 * time.Second,
-	}).DialContext,
-	MaxIdleConns:        1000,
-	MaxIdleConnsPerHost: 1000,
-}

src/go-proxy/proxy_config.go

@@ -21,7 +21,7 @@ func NewProxyConfig(provider *Provider) ProxyConfig {
 }
 
 // used by `GetFileProxyConfigs`
-func (cfg *ProxyConfig) SetDefault() error {
+func (cfg *ProxyConfig) SetDefaults() error {
 	if cfg.Alias == "" {
 		return fmt.Errorf("alias is required")
 	}

src/go-proxy/route.go

@@ -18,7 +18,28 @@ type Route interface {
 	RemoveFromRoutes()
 }
 
-var routes = initRoutes()
+func NewRoute(cfg *ProxyConfig) (Route, error) {
+	if isStreamScheme(cfg.Scheme) {
+		id := cfg.GetID()
+		if routes.StreamRoutes.Contains(id) {
+			return nil, fmt.Errorf("duplicated %s stream %s, ignoring", cfg.Scheme, id)
+		}
+		route, err := NewStreamRoute(cfg)
+		if err != nil {
+			return nil, err
+		}
+		routes.StreamRoutes.Set(id, route)
+		return route, nil
+	} else {
+		routes.HTTPRoutes.Ensure(cfg.Alias)
+		route, err := NewHTTPRoute(cfg)
+		if err != nil {
+			return nil, err
+		}
+		routes.HTTPRoutes.Get(cfg.Alias).Add(cfg.Path, route)
+		return route, nil
+	}
+}
 
 func isValidScheme(s string) bool {
 	for _, v := range ValidSchemes {
@@ -45,25 +66,4 @@ func initRoutes() *Routes {
 	return &r
 }
 
-func NewRoute(cfg *ProxyConfig) (Route, error) {
+var routes = initRoutes()
-	if isStreamScheme(cfg.Scheme) {
-		id := cfg.GetID()
-		if routes.StreamRoutes.Contains(id) {
-			return nil, fmt.Errorf("duplicated %s stream %s, ignoring", cfg.Scheme, id)
-		}
-		route, err := NewStreamRoute(cfg)
-		if err != nil {
-			return nil, err
-		}
-		routes.StreamRoutes.Set(id, route)
-		return route, nil
-	} else {
-		routes.HTTPRoutes.Ensure(cfg.Alias)
-		route, err := NewHTTPRoute(cfg)
-		if err != nil {
-			return nil, err
-		}
-		routes.HTTPRoutes.Get(cfg.Alias).Add(cfg.Path, route)
-		return route, nil
-	}
-}