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// Copyright 2018 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
package main
import (
"bytes"
"crypto/md5"
"crypto/rand"
"io"
"io/ioutil"
"net/http"
"os"
"runtime"
"strings"
"testing"
"github.com/ethereum/go-ethereum/swarm"
)
// TestCLISwarmExportImport perform the following test:
// 1. runs swarm node
// 2. uploads a random file
// 3. runs an export of the local datastore
// 4. runs a second swarm node
// 5. imports the exported datastore
// 6. fetches the uploaded random file from the second node
func TestCLISwarmExportImport(t *testing.T) {
if runtime.GOOS == "windows" {
t.Skip()
}
cluster := newTestCluster(t, 1)
// generate random 10mb file
f, cleanup := generateRandomFile(t, 10000000)
defer cleanup()
// upload the file with 'swarm up' and expect a hash
up := runSwarm(t, "--bzzapi", cluster.Nodes[0].URL, "up", f.Name())
_, matches := up.ExpectRegexp(`[a-f\d]{64}`)
up.ExpectExit()
hash := matches[0]
var info swarm.Info
if err := cluster.Nodes[0].Client.Call(&info, "bzz_info"); err != nil {
t.Fatal(err)
}
cluster.Stop()
defer cluster.Cleanup()
// generate an export.tar
exportCmd := runSwarm(t, "db", "export", info.Path+"/chunks", info.Path+"/export.tar", strings.TrimPrefix(info.BzzKey, "0x"))
exportCmd.ExpectExit()
// start second cluster
cluster2 := newTestCluster(t, 1)
var info2 swarm.Info
if err := cluster2.Nodes[0].Client.Call(&info2, "bzz_info"); err != nil {
t.Fatal(err)
}
// stop second cluster, so that we close LevelDB
cluster2.Stop()
defer cluster2.Cleanup()
// import the export.tar
importCmd := runSwarm(t, "db", "import", info2.Path+"/chunks", info.Path+"/export.tar", strings.TrimPrefix(info2.BzzKey, "0x"))
importCmd.ExpectExit()
// spin second cluster back up
cluster2.StartExistingNodes(t, 1, strings.TrimPrefix(info2.BzzAccount, "0x"))
// try to fetch imported file
res, err := http.Get(cluster2.Nodes[0].URL + "/bzz:/" + hash)
if err != nil {
t.Fatal(err)
}
if res.StatusCode != 200 {
t.Fatalf("expected HTTP status %d, got %s", 200, res.Status)
}
// compare downloaded file with the generated random file
mustEqualFiles(t, f, res.Body)
}
func mustEqualFiles(t *testing.T, up io.Reader, down io.Reader) {
h := md5.New()
upLen, err := io.Copy(h, up)
if err != nil {
t.Fatal(err)
}
upHash := h.Sum(nil)
h.Reset()
downLen, err := io.Copy(h, down)
if err != nil {
t.Fatal(err)
}
downHash := h.Sum(nil)
if !bytes.Equal(upHash, downHash) || upLen != downLen {
t.Fatalf("downloaded imported file md5=%x (length %v) is not the same as the generated one mp5=%x (length %v)", downHash, downLen, upHash, upLen)
}
}
func generateRandomFile(t *testing.T, size int) (f *os.File, teardown func()) {
// create a tmp file
tmp, err := ioutil.TempFile("", "swarm-test")
if err != nil {
t.Fatal(err)
}
// callback for tmp file cleanup
teardown = func() {
tmp.Close()
os.Remove(tmp.Name())
}
// write 10mb random data to file
buf := make([]byte, 10000000)
_, err = rand.Read(buf)
if err != nil {
t.Fatal(err)
}
ioutil.WriteFile(tmp.Name(), buf, 0755)
return tmp, teardown
}
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