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