swarm: network rewrite merge

cmd/swarm/swarm-smoke/upload_and_sync.go

@@ -0,0 +1,184 @@
+// 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"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"os"
+	"os/exec"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/ethereum/go-ethereum/log"
+	"github.com/pborman/uuid"
+
+	cli "gopkg.in/urfave/cli.v1"
+)
+
+func generateEndpoints(scheme string, cluster string, from int, to int) {
+	for port := from; port <= to; port++ {
+		endpoints = append(endpoints, fmt.Sprintf("%s://%v.%s.swarm-gateways.net", scheme, port, cluster))
+	}
+
+	if includeLocalhost {
+		endpoints = append(endpoints, "http://localhost:8500")
+	}
+}
+
+func cliUploadAndSync(c *cli.Context) error {
+	defer func(now time.Time) { log.Info("total time", "time", time.Since(now), "size", filesize) }(time.Now())
+
+	generateEndpoints(scheme, cluster, from, to)
+
+	log.Info("uploading to " + endpoints[0] + " and syncing")
+
+	f, cleanup := generateRandomFile(filesize * 1000000)
+	defer cleanup()
+
+	hash, err := upload(f, endpoints[0])
+	if err != nil {
+		log.Error(err.Error())
+		return err
+	}
+
+	fhash, err := digest(f)
+	if err != nil {
+		log.Error(err.Error())
+		return err
+	}
+
+	log.Info("uploaded successfully", "hash", hash, "digest", fmt.Sprintf("%x", fhash))
+
+	if filesize < 10 {
+		time.Sleep(15 * time.Second)
+	} else {
+		time.Sleep(2 * time.Duration(filesize) * time.Second)
+	}
+
+	wg := sync.WaitGroup{}
+	for _, endpoint := range endpoints {
+		endpoint := endpoint
+		ruid := uuid.New()[:8]
+		wg.Add(1)
+		go func(endpoint string, ruid string) {
+			for {
+				err := fetch(hash, endpoint, fhash, ruid)
+				if err != nil {
+					continue
+				}
+
+				wg.Done()
+				return
+			}
+		}(endpoint, ruid)
+	}
+	wg.Wait()
+	log.Info("all endpoints synced random file successfully")
+
+	return nil
+}
+
+// fetch is getting the requested `hash` from the `endpoint` and compares it with the `original` file
+func fetch(hash string, endpoint string, original []byte, ruid string) error {
+	log.Trace("sleeping", "ruid", ruid)
+	time.Sleep(1 * time.Second)
+
+	log.Trace("http get request", "ruid", ruid, "api", endpoint, "hash", hash)
+	res, err := http.Get(endpoint + "/bzz:/" + hash + "/")
+	if err != nil {
+		log.Warn(err.Error(), "ruid", ruid)
+		return err
+	}
+	log.Trace("http get response", "ruid", ruid, "api", endpoint, "hash", hash, "code", res.StatusCode, "len", res.ContentLength)
+
+	if res.StatusCode != 200 {
+		err := fmt.Errorf("expected status code %d, got %v", 200, res.StatusCode)
+		log.Warn(err.Error(), "ruid", ruid)
+		return err
+	}
+
+	defer res.Body.Close()
+
+	rdigest, err := digest(res.Body)
+	if err != nil {
+		log.Warn(err.Error(), "ruid", ruid)
+		return err
+	}
+
+	if !bytes.Equal(rdigest, original) {
+		err := fmt.Errorf("downloaded imported file md5=%x is not the same as the generated one=%x", rdigest, original)
+		log.Warn(err.Error(), "ruid", ruid)
+		return err
+	}
+
+	log.Trace("downloaded file matches random file", "ruid", ruid, "len", res.ContentLength)
+
+	return nil
+}
+
+// upload is uploading a file `f` to `endpoint` via the `swarm up` cmd
+func upload(f *os.File, endpoint string) (string, error) {
+	var out bytes.Buffer
+	cmd := exec.Command("swarm", "--bzzapi", endpoint, "up", f.Name())
+	cmd.Stdout = &out
+	err := cmd.Run()
+	if err != nil {
+		return "", err
+	}
+	hash := strings.TrimRight(out.String(), "\r\n")
+	return hash, nil
+}
+
+func digest(r io.Reader) ([]byte, error) {
+	h := md5.New()
+	_, err := io.Copy(h, r)
+	if err != nil {
+		return nil, err
+	}
+	return h.Sum(nil), nil
+}
+
+// generateRandomFile is creating a temporary file with the requested byte size
+func generateRandomFile(size int) (f *os.File, teardown func()) {
+	// create a tmp file
+	tmp, err := ioutil.TempFile("", "swarm-test")
+	if err != nil {
+		panic(err)
+	}
+
+	// callback for tmp file cleanup
+	teardown = func() {
+		tmp.Close()
+		os.Remove(tmp.Name())
+	}
+
+	buf := make([]byte, size)
+	_, err = rand.Read(buf)
+	if err != nil {
+		panic(err)
+	}
+	ioutil.WriteFile(tmp.Name(), buf, 0755)
+
+	return tmp, teardown
+}