path: root/cmd/swarm/swarm-smoke/feed_upload_and_sync.go

package main

import (
    "bytes"
    "crypto/md5"
    "fmt"
    "io"
    "io/ioutil"
    "net/http"
    "os"
    "os/exec"
    "strings"
    "sync"
    "time"

    "github.com/ethereum/go-ethereum/common/hexutil"
    "github.com/ethereum/go-ethereum/crypto"
    "github.com/ethereum/go-ethereum/log"
    "github.com/ethereum/go-ethereum/swarm/multihash"
    "github.com/ethereum/go-ethereum/swarm/storage/feed"
    colorable "github.com/mattn/go-colorable"
    "github.com/pborman/uuid"
    cli "gopkg.in/urfave/cli.v1"
)

const (
    feedRandomDataLength = 8
)

// TODO: retrieve with manifest + extract repeating code
func cliFeedUploadAndSync(c *cli.Context) error {

    log.Root().SetHandler(log.CallerFileHandler(log.LvlFilterHandler(log.Lvl(verbosity), log.StreamHandler(colorable.NewColorableStderr(), log.TerminalFormat(true)))))

    defer func(now time.Time) { log.Info("total time", "time", time.Since(now), "size (kb)", filesize) }(time.Now())

    generateEndpoints(scheme, cluster, from, to)

    log.Info("generating and uploading MRUs to " + endpoints[0] + " and syncing")

    // create a random private key to sign updates with and derive the address
    pkFile, err := ioutil.TempFile("", "swarm-feed-smoke-test")
    if err != nil {
        return err
    }
    defer pkFile.Close()
    defer os.Remove(pkFile.Name())

    privkeyHex := "0000000000000000000000000000000000000000000000000000000000001976"
    privKey, err := crypto.HexToECDSA(privkeyHex)
    if err != nil {
        return err
    }
    user := crypto.PubkeyToAddress(privKey.PublicKey)
    userHex := hexutil.Encode(user.Bytes())

    // save the private key to a file
    _, err = io.WriteString(pkFile, privkeyHex)
    if err != nil {
        return err
    }

    // keep hex strings for topic and subtopic
    var topicHex string
    var subTopicHex string

    // and create combination hex topics for bzz-feed retrieval
    // xor'ed with topic (zero-value topic if no topic)
    var subTopicOnlyHex string
    var mergedSubTopicHex string

    // generate random topic and subtopic and put a hex on them
    topicBytes, err := generateRandomData(feed.TopicLength)
    topicHex = hexutil.Encode(topicBytes)
    subTopicBytes, err := generateRandomData(8)
    subTopicHex = hexutil.Encode(subTopicBytes)
    if err != nil {
        return err
    }
    mergedSubTopic, err := feed.NewTopic(subTopicHex, topicBytes)
    if err != nil {
        return err
    }
    mergedSubTopicHex = hexutil.Encode(mergedSubTopic[:])
    subTopicOnlyBytes, err := feed.NewTopic(subTopicHex, nil)
    if err != nil {
        return err
    }
    subTopicOnlyHex = hexutil.Encode(subTopicOnlyBytes[:])

    // create feed manifest, topic only
    var out bytes.Buffer
    cmd := exec.Command("swarm", "--bzzapi", endpoints[0], "feed", "create", "--topic", topicHex, "--user", userHex)
    cmd.Stdout = &out
    log.Debug("create feed manifest topic cmd", "cmd", cmd)
    err = cmd.Run()
    if err != nil {
        return err
    }
    manifestWithTopic := strings.TrimRight(out.String(), string([]byte{0x0a}))
    if len(manifestWithTopic) != 64 {
        return fmt.Errorf("unknown feed create manifest hash format (topic): (%d) %s", len(out.String()), manifestWithTopic)
    }
    log.Debug("create topic feed", "manifest", manifestWithTopic)
    out.Reset()

    // create feed manifest, subtopic only
    cmd = exec.Command("swarm", "--bzzapi", endpoints[0], "feed", "create", "--name", subTopicHex, "--user", userHex)
    cmd.Stdout = &out
    log.Debug("create feed manifest subtopic cmd", "cmd", cmd)
    err = cmd.Run()
    if err != nil {
        return err
    }
    manifestWithSubTopic := strings.TrimRight(out.String(), string([]byte{0x0a}))
    if len(manifestWithSubTopic) != 64 {
        return fmt.Errorf("unknown feed create manifest hash format (subtopic): (%d) %s", len(out.String()), manifestWithSubTopic)
    }
    log.Debug("create subtopic feed", "manifest", manifestWithTopic)
    out.Reset()

    // create feed manifest, merged topic
    cmd = exec.Command("swarm", "--bzzapi", endpoints[0], "feed", "create", "--topic", topicHex, "--name", subTopicHex, "--user", userHex)
    cmd.Stdout = &out
    log.Debug("create feed manifest mergetopic cmd", "cmd", cmd)
    err = cmd.Run()
    if err != nil {
        log.Error(err.Error())
        return err
    }
    manifestWithMergedTopic := strings.TrimRight(out.String(), string([]byte{0x0a}))
    if len(manifestWithMergedTopic) != 64 {
        return fmt.Errorf("unknown feed create manifest hash format (mergedtopic): (%d) %s", len(out.String()), manifestWithMergedTopic)
    }
    log.Debug("create mergedtopic feed", "manifest", manifestWithMergedTopic)
    out.Reset()

    // create test data
    data, err := generateRandomData(feedRandomDataLength)
    if err != nil {
        return err
    }
    h := md5.New()
    h.Write(data)
    dataHash := h.Sum(nil)
    dataHex := hexutil.Encode(data)

    // update with topic
    cmd = exec.Command("swarm", "--bzzaccount", pkFile.Name(), "--bzzapi", endpoints[0], "feed", "update", "--topic", topicHex, dataHex)
    cmd.Stdout = &out
    log.Debug("update feed manifest topic cmd", "cmd", cmd)
    err = cmd.Run()
    if err != nil {
        return err
    }
    log.Debug("feed update topic", "out", out)
    out.Reset()

    // update with subtopic
    cmd = exec.Command("swarm", "--bzzaccount", pkFile.Name(), "--bzzapi", endpoints[0], "feed", "update", "--name", subTopicHex, dataHex)
    cmd.Stdout = &out
    log.Debug("update feed manifest subtopic cmd", "cmd", cmd)
    err = cmd.Run()
    if err != nil {
        return err
    }
    log.Debug("feed update subtopic", "out", out)
    out.Reset()

    // update with merged topic
    cmd = exec.Command("swarm", "--bzzaccount", pkFile.Name(), "--bzzapi", endpoints[0], "feed", "update", "--topic", topicHex, "--name", subTopicHex, dataHex)
    cmd.Stdout = &out
    log.Debug("update feed manifest merged topic cmd", "cmd", cmd)
    err = cmd.Run()
    if err != nil {
        return err
    }
    log.Debug("feed update mergedtopic", "out", out)
    out.Reset()

    time.Sleep(3 * time.Second)

    // retrieve the data
    wg := sync.WaitGroup{}
    for _, endpoint := range endpoints {
        // raw retrieve, topic only
        for _, hex := range []string{topicHex, subTopicOnlyHex, mergedSubTopicHex} {
            wg.Add(1)
            ruid := uuid.New()[:8]
            go func(hex string, endpoint string, ruid string) {
                for {
                    err := fetchFeed(hex, userHex, endpoint, dataHash, ruid)
                    if err != nil {
                        continue
                    }

                    wg.Done()
                    return
                }
            }(hex, endpoint, ruid)

        }
    }
    wg.Wait()
    log.Info("all endpoints synced random data successfully")

    // upload test file
    log.Info("uploading to " + endpoints[0] + " and syncing")

    f, cleanup := generateRandomFile(filesize * 1000)
    defer cleanup()

    hash, err := upload(f, endpoints[0])
    if err != nil {
        return err
    }
    hashBytes, err := hexutil.Decode("0x" + hash)
    if err != nil {
        return err
    }
    multihashHex := hexutil.Encode(multihash.ToMultihash(hashBytes))

    fileHash, err := digest(f)
    if err != nil {
        return err
    }

    log.Info("uploaded successfully", "hash", hash, "digest", fmt.Sprintf("%x", fileHash))

    // update file with topic
    cmd = exec.Command("swarm", "--bzzaccount", pkFile.Name(), "--bzzapi", endpoints[0], "feed", "update", "--topic", topicHex, multihashHex)
    cmd.Stdout = &out
    err = cmd.Run()
    if err != nil {
        return err
    }
    log.Debug("feed update topic", "out", out)
    out.Reset()

    // update file with subtopic
    cmd = exec.Command("swarm", "--bzzaccount", pkFile.Name(), "--bzzapi", endpoints[0], "feed", "update", "--name", subTopicHex, multihashHex)
    cmd.Stdout = &out
    err = cmd.Run()
    if err != nil {
        return err
    }
    log.Debug("feed update subtopic", "out", out)
    out.Reset()

    // update file with merged topic
    cmd = exec.Command("swarm", "--bzzaccount", pkFile.Name(), "--bzzapi", endpoints[0], "feed", "update", "--topic", topicHex, "--name", subTopicHex, multihashHex)
    cmd.Stdout = &out
    err = cmd.Run()
    if err != nil {
        return err
    }
    log.Debug("feed update mergedtopic", "out", out)
    out.Reset()

    time.Sleep(3 * time.Second)

    for _, endpoint := range endpoints {

        // manifest retrieve, topic only
        for _, url := range []string{manifestWithTopic, manifestWithSubTopic, manifestWithMergedTopic} {
            wg.Add(1)
            ruid := uuid.New()[:8]
            go func(url string, endpoint string, ruid string) {
                for {
                    err := fetch(url, endpoint, fileHash, ruid)
                    if err != nil {
                        continue
                    }

                    wg.Done()
                    return
                }
            }(url, endpoint, ruid)
        }

    }
    wg.Wait()
    log.Info("all endpoints synced random file successfully")

    return nil
}

func fetchFeed(topic string, user string, endpoint string, original []byte, ruid string) error {
    log.Trace("sleeping", "ruid", ruid)
    time.Sleep(3 * time.Second)

    log.Trace("http get request (feed)", "ruid", ruid, "api", endpoint, "topic", topic, "user", user)
    res, err := http.Get(endpoint + "/bzz-feed:/?topic=" + topic + "&user=" + user)
    if err != nil {
        return err
    }
    log.Trace("http get response (feed)", "ruid", ruid, "api", endpoint, "topic", topic, "user", user, "code", res.StatusCode, "len", res.ContentLength)

    if res.StatusCode != 200 {
        return fmt.Errorf("expected status code %d, got %v (ruid %v)", 200, res.StatusCode, ruid)
    }

    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
}