proxy: initial userspace tcp proxy

proxy/tcpproxy/userspace_test.go

@@ -0,0 +1,73 @@
+// Copyright 2016 CoreOS, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tcpproxy
+
+import (
+	"fmt"
+	"io/ioutil"
+	"net"
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"testing"
+	"time"
+)
+
+func TestUserspaceProxy(t *testing.T) {
+	l, err := net.Listen("tcp", "127.0.0.1:0")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer l.Close()
+
+	want := "hello proxy"
+	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		fmt.Fprint(w, want)
+	}))
+	defer ts.Close()
+
+	u, err := url.Parse(ts.URL)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	p := tcpProxy{
+		l:               l,
+		donec:           make(chan struct{}),
+		monitorInterval: time.Second,
+
+		remotes: []*remote{
+			{addr: u.Host},
+		},
+	}
+	go p.run()
+	defer p.stop()
+
+	u.Host = l.Addr().String()
+
+	res, err := http.Get(u.String())
+	if err != nil {
+		t.Fatal(err)
+	}
+	got, gerr := ioutil.ReadAll(res.Body)
+	res.Body.Close()
+	if gerr != nil {
+		t.Fatal(gerr)
+	}
+
+	if string(got) != want {
+		t.Errorf("got = %s, want %s", got, want)
+	}
+}