Proxy: Better errors + remote custom TLS (#1197)

Proxy will be more verbose on errors + possibility to configure custom transport (example: for custom TLS certificates)

middleware/proxy_1_11_test.go

@@ -0,0 +1,52 @@
+// +build go1.11
+
+package middleware
+
+import (
+	"github.com/labstack/echo"
+	"github.com/stretchr/testify/assert"
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"testing"
+)
+
+func TestProxy_1_11(t *testing.T) {
+	// Setup
+	url1, _ := url.Parse("http://127.0.0.1:27121")
+	url2, _ := url.Parse("http://127.0.0.1:27122")
+
+	targets := []*ProxyTarget{
+		{
+			Name: "target 1",
+			URL:  url1,
+		},
+		{
+			Name: "target 2",
+			URL:  url2,
+		},
+	}
+	rb := NewRandomBalancer(nil)
+	// must add targets:
+	for _, target := range targets {
+		assert.True(t, rb.AddTarget(target))
+	}
+
+	// must ignore duplicates:
+	for _, target := range targets {
+		assert.False(t, rb.AddTarget(target))
+	}
+
+	// Random
+	e := echo.New()
+	e.Use(Proxy(rb))
+	req := httptest.NewRequest(echo.GET, "/", nil)
+	rec := newCloseNotifyRecorder()
+
+	// Remote unreachable
+	rec = newCloseNotifyRecorder()
+	req.URL.Path = "/api/users"
+	e.ServeHTTP(rec, req)
+	assert.Equal(t, "/api/users", req.URL.Path)
+	assert.Equal(t, http.StatusServiceUnavailable, rec.Code)
+}