Forward path and query string through proxy

Signed-off-by: Alex Ellis <alexellis2@gmail.com>

gateway/tests/forward_request_test.go

@@ -0,0 +1,75 @@
+package tests
+
+import (
+	"net/http"
+	"testing"
+
+	"github.com/openfaas/faas/gateway/requests"
+)
+
+func TestFormattingOfURLWithPath_NoQuery(t *testing.T) {
+	req := requests.ForwardRequest{
+		RawQuery: "",
+		RawPath:  "/encode/utf8/",
+		Method:   http.MethodPost,
+	}
+
+	url := req.ToURL("markdown", 8080)
+	want := "http://markdown:8080/encode/utf8/"
+	if url != want {
+		t.Logf("Got: %s, want: %s", url, want)
+		t.Fail()
+	}
+}
+
+func TestFormattingOfURLAtRoot_NoQuery(t *testing.T) {
+	req := requests.ForwardRequest{
+		RawQuery: "",
+		RawPath:  "/",
+		Method:   http.MethodPost,
+	}
+
+	url := req.ToURL("markdown", 8080)
+	want := "http://markdown:8080/"
+	if url != want {
+		t.Logf("Got: %s, want: %s", url, want)
+		t.Fail()
+	}
+}
+
+// experimental test
+// func TestMyURL(t *testing.T) {
+// 	v, _ := url.Parse("http://markdown/site?query=test")
+// 	t.Logf("RequestURI %s", v.RequestURI())
+// 	t.Logf("extra %s", v.Path)
+// }
+
+func TestUrlForFlask(t *testing.T) {
+	req := requests.ForwardRequest{
+		RawQuery: "query=uptime",
+		RawPath:  "/function/flask",
+		Method:   http.MethodPost,
+	}
+
+	url := req.ToURL("flask", 8080)
+	want := "http://flask:8080/function/flask?query=uptime"
+	if url != want {
+		t.Logf("Got: %s, want: %s", url, want)
+		t.Fail()
+	}
+}
+
+func TestFormattingOfURL_OneQuery(t *testing.T) {
+	req := requests.ForwardRequest{
+		RawQuery: "name=alex",
+		RawPath:  "/",
+		Method:   http.MethodPost,
+	}
+
+	url := req.ToURL("flask", 8080)
+	want := "http://flask:8080/?name=alex"
+	if url != want {
+		t.Logf("Got: %s, want: %s", url, want)
+		t.Fail()
+	}
+}