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Merge pull request #3247 from fjl/bzzd

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cmd: add swarm command line tools
This commit is contained in:
Felix Lange 2016-11-11 06:13:16 +01:00 committed by GitHub
commit 9eb6f627fa
11 changed files with 492 additions and 117 deletions
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8
accounts/account_manager.go
View File

@ -228,11 +228,17 @@ func (am *Manager) TimedUnlock(a Account, passphrase string, timeout time.Durati
return nil
}
func (am *Manager) getDecryptedKey(a Account, auth string) (Account, *Key, error) {
// Find resolves the given account into a unique entry in the keystore.
func (am *Manager) Find(a Account) (Account, error) {
am.cache.maybeReload()
am.cache.mu.Lock()
a, err := am.cache.find(a)
am.cache.mu.Unlock()
return a, err
}
func (am *Manager) getDecryptedKey(a Account, auth string) (Account, *Key, error) {
a, err := am.Find(a)
if err != nil {
return a, nil, err
}

246
cmd/bzzd/main.go Normal file
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@ -0,0 +1,246 @@
// Copyright 2016 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 (
"crypto/ecdsa"
"fmt"
"io/ioutil"
"os"
"runtime"
"strconv"
"github.com/ethereum/go-ethereum/accounts"
"github.com/ethereum/go-ethereum/cmd/utils"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/console"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/ethclient"
"github.com/ethereum/go-ethereum/internal/debug"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
"github.com/ethereum/go-ethereum/node"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/p2p/discover"
"github.com/ethereum/go-ethereum/swarm"
bzzapi "github.com/ethereum/go-ethereum/swarm/api"
"gopkg.in/urfave/cli.v1"
)
const clientIdentifier = "bzzd"
var (
gitCommit string // Git SHA1 commit hash of the release (set via linker flags)
app = utils.NewApp(gitCommit, "Ethereum Swarm server daemon")
)
var (
ChequebookAddrFlag = cli.StringFlag{
Name: "chequebook",
Usage: "chequebook contract address",
}
SwarmAccountFlag = cli.StringFlag{
Name: "bzzaccount",
Usage: "Swarm account key file",
}
SwarmPortFlag = cli.StringFlag{
Name: "bzzport",
Usage: "Swarm local http api port",
}
SwarmConfigPathFlag = cli.StringFlag{
Name: "bzzconfig",
Usage: "Swarm config file path (datadir/bzz)",
}
SwarmSwapDisabled = cli.BoolFlag{
Name: "bzznoswap",
Usage: "Swarm SWAP disabled (default false)",
}
SwarmSyncDisabled = cli.BoolFlag{
Name: "bzznosync",
Usage: "Swarm Syncing disabled (default false)",
}
EthAPI = cli.StringFlag{
Name: "ethapi",
Usage: "URL of the Ethereum API provider",
Value: node.DefaultIPCEndpoint("geth"),
}
)
var defaultBootnodes = []string{}
func init() {
// Override flag defaults so bzzd can run alongside geth.
utils.ListenPortFlag.Value = 30399
utils.IPCPathFlag.Value = utils.DirectoryString{Value: "bzzd.ipc"}
// Set up the cli app.
app.Commands = nil
app.Action = bzzd
app.Flags = []cli.Flag{
utils.IdentityFlag,
utils.DataDirFlag,
utils.BootnodesFlag,
utils.KeyStoreDirFlag,
utils.ListenPortFlag,
utils.MaxPeersFlag,
utils.NATFlag,
utils.NodeKeyFileFlag,
utils.NodeKeyHexFlag,
utils.IPCDisabledFlag,
utils.IPCApiFlag,
utils.IPCPathFlag,
// bzzd-specific flags
EthAPI,
SwarmConfigPathFlag,
SwarmSwapDisabled,
SwarmSyncDisabled,
SwarmPortFlag,
SwarmAccountFlag,
ChequebookAddrFlag,
}
app.Flags = append(app.Flags, debug.Flags...)
app.Before = func(ctx *cli.Context) error {
runtime.GOMAXPROCS(runtime.NumCPU())
return debug.Setup(ctx)
}
app.After = func(ctx *cli.Context) error {
debug.Exit()
return nil
}
}
func main() {
if err := app.Run(os.Args); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
}
func bzzd(ctx *cli.Context) error {
stack := utils.MakeNode(ctx, clientIdentifier, gitCommit)
registerBzzService(ctx, stack)
utils.StartNode(stack)
// Add bootnodes as initial peers.
if ctx.GlobalIsSet(utils.BootnodesFlag.Name) {
injectBootnodes(stack.Server(), ctx.GlobalStringSlice(utils.BootnodesFlag.Name))
} else {
injectBootnodes(stack.Server(), defaultBootnodes)
}
stack.Wait()
return nil
}
func registerBzzService(ctx *cli.Context, stack *node.Node) {
prvkey := getAccount(ctx, stack)
chbookaddr := common.HexToAddress(ctx.GlobalString(ChequebookAddrFlag.Name))
bzzdir := ctx.GlobalString(SwarmConfigPathFlag.Name)
if bzzdir == "" {
bzzdir = stack.InstanceDir()
}
bzzconfig, err := bzzapi.NewConfig(bzzdir, chbookaddr, prvkey)
if err != nil {
utils.Fatalf("unable to configure swarm: %v", err)
}
bzzport := ctx.GlobalString(SwarmPortFlag.Name)
if len(bzzport) > 0 {
bzzconfig.Port = bzzport
}
swapEnabled := !ctx.GlobalBool(SwarmSwapDisabled.Name)
syncEnabled := !ctx.GlobalBool(SwarmSyncDisabled.Name)
ethapi := ctx.GlobalString(EthAPI.Name)
if ethapi == "" {
utils.Fatalf("Option %q must not be empty", EthAPI.Name)
}
boot := func(ctx *node.ServiceContext) (node.Service, error) {
client, err := ethclient.Dial(ethapi)
if err != nil {
utils.Fatalf("Can't connect: %v", err)
}
return swarm.NewSwarm(ctx, client, bzzconfig, swapEnabled, syncEnabled)
}
if err := stack.Register(boot); err != nil {
utils.Fatalf("Failed to register the Swarm service: %v", err)
}
}
func getAccount(ctx *cli.Context, stack *node.Node) *ecdsa.PrivateKey {
keyid := ctx.GlobalString(SwarmAccountFlag.Name)
if keyid == "" {
utils.Fatalf("Option %q is required", SwarmAccountFlag.Name)
}
// Try to load the arg as a hex key file.
if key, err := crypto.LoadECDSA(keyid); err == nil {
glog.V(logger.Info).Infof("swarm account key loaded: %#x", crypto.PubkeyToAddress(key.PublicKey))
return key
}
// Otherwise try getting it from the keystore.
return decryptStoreAccount(stack.AccountManager(), keyid)
}
func decryptStoreAccount(accman *accounts.Manager, account string) *ecdsa.PrivateKey {
var a accounts.Account
var err error
if common.IsHexAddress(account) {
a, err = accman.Find(accounts.Account{Address: common.HexToAddress(account)})
} else if ix, ixerr := strconv.Atoi(account); ixerr == nil {
a, err = accman.AccountByIndex(ix)
} else {
utils.Fatalf("Can't find swarm account key %s", account)
}
if err != nil {
utils.Fatalf("Can't find swarm account key: %v", err)
}
keyjson, err := ioutil.ReadFile(a.File)
if err != nil {
utils.Fatalf("Can't load swarm account key: %v", err)
}
for i := 1; i <= 3; i++ {
passphrase := promptPassphrase(fmt.Sprintf("Unlocking swarm account %s [%d/3]", a.Address.Hex(), i))
key, err := accounts.DecryptKey(keyjson, passphrase)
if err == nil {
return key.PrivateKey
}
}
utils.Fatalf("Can't decrypt swarm account key")
return nil
}
func promptPassphrase(prompt string) string {
if prompt != "" {
fmt.Println(prompt)
}
password, err := console.Stdin.PromptPassword("Passphrase: ")
if err != nil {
utils.Fatalf("Failed to read passphrase: %v", err)
}
return password
}
func injectBootnodes(srv *p2p.Server, nodes []string) {
for _, url := range nodes {
n, err := discover.ParseNode(url)
if err != nil {
glog.Errorf("invalid bootnode %q", err)
}
srv.AddPeer(n)
}
}

49
cmd/bzzhash/main.go Normal file
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@ -0,0 +1,49 @@
// Copyright 2016 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/>.
// Command bzzhash computes a swarm tree hash.
package main
import (
"fmt"
"os"
"runtime"
"github.com/ethereum/go-ethereum/swarm/storage"
)
func main() {
runtime.GOMAXPROCS(runtime.NumCPU())
if len(os.Args) < 2 {
fmt.Println("Usage: bzzhash <file name>")
os.Exit(0)
}
f, err := os.Open(os.Args[1])
if err != nil {
fmt.Println("Error opening file " + os.Args[1])
os.Exit(1)
}
stat, _ := f.Stat()
chunker := storage.NewTreeChunker(storage.NewChunkerParams())
key, err := chunker.Split(f, stat.Size(), nil, nil, nil)
if err != nil {
fmt.Fprintf(os.Stderr, "%v\n", err)
} else {
fmt.Printf("%v\n", key)
}
}

161
cmd/bzzup/main.go Normal file
View File

@ -0,0 +1,161 @@
// Copyright 2016 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/>.
// Command bzzup uploads files to the swarm HTTP API.
package main
import (
"bytes"
"encoding/json"
"flag"
"fmt"
"io"
"io/ioutil"
"log"
"mime"
"net/http"
"os"
"path/filepath"
"strings"
)
func main() {
var (
bzzapiFlag = flag.String("bzzapi", "http://127.0.0.1:8500", "Swarm HTTP endpoint")
recursiveFlag = flag.Bool("recursive", false, "Upload directories recursively")
manifestFlag = flag.Bool("manifest", true, "Skip automatic manifest upload")
)
log.SetOutput(os.Stderr)
log.SetFlags(0)
flag.Parse()
if flag.NArg() != 1 {
log.Fatal("need filename as the first and only argument")
}
var (
file = flag.Arg(0)
client = &client{api: *bzzapiFlag}
mroot manifest
)
fi, err := os.Stat(file)
if err != nil {
log.Fatal(err)
}
if fi.IsDir() {
if !*recursiveFlag {
log.Fatal("argument is a directory and recursive upload is disabled")
}
mroot, err = client.uploadDirectory(file)
} else {
mroot, err = client.uploadFile(file, fi)
if *manifestFlag {
// Wrap the raw file entry in a proper manifest so both hashes get printed.
mroot = manifest{Entries: []manifest{mroot}}
}
}
if err != nil {
log.Fatalln("upload failed:", err)
}
if *manifestFlag {
hash, err := client.uploadManifest(mroot)
if err != nil {
log.Fatalln("manifest upload failed:", err)
}
mroot.Hash = hash
}
// Print the manifest. This is the only output to stdout.
mrootJSON, _ := json.MarshalIndent(mroot, "", " ")
fmt.Println(string(mrootJSON))
}
// client wraps interaction with the swarm HTTP gateway.
type client struct {
api string
}
// manifest is the JSON representation of a swarm manifest.
type manifest struct {
Hash string `json:"hash,omitempty"`
ContentType string `json:"contentType,omitempty"`
Path string `json:"path,omitempty"`
Entries []manifest `json:"entries,omitempty"`
}
func (c *client) uploadFile(file string, fi os.FileInfo) (manifest, error) {
hash, err := c.uploadFileContent(file, fi)
m := manifest{
Hash: hash,
ContentType: mime.TypeByExtension(filepath.Ext(fi.Name())),
}
return m, err
}
func (c *client) uploadDirectory(dir string) (manifest, error) {
dirm := manifest{}
prefix := filepath.ToSlash(dir) + "/"
err := filepath.Walk(dir, func(path string, fi os.FileInfo, err error) error {
if err != nil || fi.IsDir() {
return err
}
if !strings.HasPrefix(path, dir) {
return fmt.Errorf("path %s outside directory %s", path, dir)
}
entry, err := c.uploadFile(path, fi)
entry.Path = strings.TrimPrefix(filepath.ToSlash(path), prefix)
dirm.Entries = append(dirm.Entries, entry)
return err
})
return dirm, err
}
func (c *client) uploadFileContent(file string, fi os.FileInfo) (string, error) {
fd, err := os.Open(file)
if err != nil {
return "", err
}
defer fd.Close()
log.Printf("uploading file %s (%d bytes)", file, fi.Size())
return c.postRaw("application/octet-stream", fi.Size(), fd)
}
func (c *client) uploadManifest(m manifest) (string, error) {
jsm, err := json.Marshal(m)
if err != nil {
panic(err)
}
log.Println("uploading manifest")
return c.postRaw("application/json", int64(len(jsm)), ioutil.NopCloser(bytes.NewReader(jsm)))
}
func (c *client) postRaw(mimetype string, size int64, body io.ReadCloser) (string, error) {
req, err := http.NewRequest("POST", c.api+"/bzzr:/", body)
if err != nil {
return "", err
}
req.Header.Set("content-type", mimetype)
req.ContentLength = size
resp, err := http.DefaultClient.Do(req)
if err != nil {
return "", err
}
defer resp.Body.Close()
if resp.StatusCode >= 400 {
return "", fmt.Errorf("bad status: %s", resp.Status)
}
content, err := ioutil.ReadAll(resp.Body)
return string(content), err
}

101
cmd/v5test/main.go
View File

@ -1,101 +0,0 @@
// Copyright 2016 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/>.
// bootnode runs a bootstrap node for the Ethereum Discovery Protocol.
package main
import (
"flag"
"fmt"
"math/rand"
"strconv"
"time"
"github.com/ethereum/go-ethereum/cmd/utils"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/logger/glog"
"github.com/ethereum/go-ethereum/p2p/discv5"
"github.com/ethereum/go-ethereum/p2p/nat"
)
func main() {
var (
listenPort = flag.Int("addr", 31000, "beginning of listening port range")
natdesc = flag.String("nat", "none", "port mapping mechanism (any|none|upnp|pmp|extip:<IP>)")
count = flag.Int("count", 1, "number of v5 topic discovery test nodes (adds default bootnodes to form a test network)")
regtopic = flag.String("reg", "", "topic to register on the network")
looktopic = flag.String("search", "", "topic to search on the network")
)
flag.Var(glog.GetVerbosity(), "verbosity", "log verbosity (0-9)")
flag.Var(glog.GetVModule(), "vmodule", "log verbosity pattern")
glog.SetToStderr(true)
flag.Parse()
natm, err := nat.Parse(*natdesc)
if err != nil {
utils.Fatalf("-nat: %v", err)
}
for i := 0; i < *count; i++ {
listenAddr := ":" + strconv.Itoa(*listenPort+i)
nodeKey, err := crypto.GenerateKey()
if err != nil {
utils.Fatalf("could not generate key: %v", err)
}
if net, err := discv5.ListenUDP(nodeKey, listenAddr, natm, ""); err != nil {
utils.Fatalf("%v", err)
} else {
if err := net.SetFallbackNodes(discv5.BootNodes); err != nil {
utils.Fatalf("%v", err)
}
go func() {
if *looktopic == "" {
for i := 0; i < 20; i++ {
time.Sleep(time.Millisecond * time.Duration(2000+rand.Intn(2001)))
net.BucketFill()
}
}
switch {
case *regtopic != "":
// register topic
fmt.Println("Starting topic register")
stop := make(chan struct{})
net.RegisterTopic(discv5.Topic(*regtopic), stop)
case *looktopic != "":
// search topic
fmt.Println("Starting topic search")
stop := make(chan struct{})
found := make(chan string, 100)
go net.SearchTopic(discv5.Topic(*looktopic), stop, found)
for s := range found {
fmt.Println(time.Now(), s)
}
default:
// just keep doing lookups
for {
time.Sleep(time.Millisecond * time.Duration(40000+rand.Intn(40001)))
net.BucketFill()
}
}
}()
}
fmt.Printf("Started test node #%d with public key %v\n", i, discv5.PubkeyID(&nodeKey.PublicKey))
}
select {}
}

11
node/config.go
View File

@ -268,7 +268,7 @@ func (c *Config) name() string {
return c.Name
}
// These resources are resolved differently for the "geth" and "geth-testnet" instances.
// These resources are resolved differently for "geth" instances.
var isOldGethResource = map[string]bool{
"chaindata": true,
"nodes": true,
@ -297,7 +297,14 @@ func (c *Config) resolvePath(path string) string {
return oldpath
}
}
return filepath.Join(c.DataDir, c.name(), path)
return filepath.Join(c.instanceDir(), path)
}
func (c *Config) instanceDir() string {
if c.DataDir == "" {
return ""
}
return filepath.Join(c.DataDir, c.name())
}
// NodeKey retrieves the currently configured private key of the node, checking

6
node/node.go
View File

@ -601,10 +601,16 @@ func (n *Node) Service(service interface{}) error {
}
// DataDir retrieves the current datadir used by the protocol stack.
// Deprecated: No files should be stored in this directory, use InstanceDir instead.
func (n *Node) DataDir() string {
return n.config.DataDir
}
// InstanceDir retrieves the instance directory used by the protocol stack.
func (n *Node) InstanceDir() string {
return n.config.instanceDir()
}
// AccountManager retrieves the account manager used by the protocol stack.
func (n *Node) AccountManager() *accounts.Manager {
return n.accman

3
swarm/api/config.go
View File

@ -59,9 +59,8 @@ type Config struct {
// config is agnostic to where private key is coming from
// so managing accounts is outside swarm and left to wrappers
func NewConfig(path string, contract common.Address, prvKey *ecdsa.PrivateKey) (self *Config, err error) {
address := crypto.PubkeyToAddress(prvKey.PublicKey) // default beneficiary address
dirpath := filepath.Join(path, common.Bytes2Hex(address.Bytes()))
dirpath := filepath.Join(path, "bzz-"+common.Bytes2Hex(address.Bytes()))
err = os.MkdirAll(dirpath, os.ModePerm)
if err != nil {
return

16
swarm/api/config_test.go
View File

@ -30,14 +30,14 @@ import (
var (
hexprvkey = "65138b2aa745041b372153550584587da326ab440576b2a1191dd95cee30039c"
defaultConfig = `{
"ChunkDbPath": "` + filepath.Join("TMPDIR", "0d2f62485607cf38d9d795d93682a517661e513e", "chunks") + `",
"ChunkDbPath": "` + filepath.Join("TMPDIR", "chunks") + `",
"DbCapacity": 5000000,
"CacheCapacity": 5000,
"Radius": 0,
"Branches": 128,
"Hash": "SHA3",
"CallInterval": 3000000000,
"KadDbPath": "` + filepath.Join("TMPDIR", "0d2f62485607cf38d9d795d93682a517661e513e", "bzz-peers.json") + `",
"KadDbPath": "` + filepath.Join("TMPDIR", "bzz-peers.json") + `",
"MaxProx": 8,
"ProxBinSize": 2,
"BucketSize": 4,
@ -59,7 +59,7 @@ var (
"Contract": "0x0000000000000000000000000000000000000000",
"Beneficiary": "0x0d2f62485607cf38d9d795d93682a517661e513e"
},
"RequestDbPath": "` + filepath.Join("TMPDIR", "0d2f62485607cf38d9d795d93682a517661e513e", "requests") + `",
"RequestDbPath": "` + filepath.Join("TMPDIR", "requests") + `",
"RequestDbBatchSize": 512,
"KeyBufferSize": 1024,
"SyncBatchSize": 128,
@ -79,7 +79,7 @@ var (
true,
false
],
"Path": "` + filepath.Join("TMPDIR", "0d2f62485607cf38d9d795d93682a517661e513e") + `",
"Path": "TMPDIR",
"Port": "8500",
"PublicKey": "0x045f5cfd26692e48d0017d380349bcf50982488bc11b5145f3ddf88b24924299048450542d43527fbe29a5cb32f38d62755393ac002e6bfdd71b8d7ba725ecd7a3",
"BzzKey": "0xe861964402c0b78e2d44098329b8545726f215afa737d803714a4338552fcb81",
@ -99,16 +99,12 @@ func TestConfigWriteRead(t *testing.T) {
if err != nil {
t.Fatalf("expected no error, got %v", err)
}
account := crypto.PubkeyToAddress(prvkey.PublicKey)
dirpath := filepath.Join(tmp, common.Bytes2Hex(account.Bytes()))
confpath := filepath.Join(dirpath, "config.json")
data, err := ioutil.ReadFile(confpath)
data, err := ioutil.ReadFile(filepath.Join(orig.Path, "config.json"))
if err != nil {
t.Fatalf("default config file cannot be read: %v", err)
}
exp := strings.Replace(defaultConfig, "TMPDIR", tmp, -1)
exp := strings.Replace(defaultConfig, "TMPDIR", orig.Path, -1)
exp = strings.Replace(exp, "\\", "\\\\", -1)
if string(data) != exp {
t.Fatalf("default config mismatch:\nexpected: %v\ngot: %v", exp, string(data))
}

6
swarm/api/http/server.go
View File

@ -115,7 +115,11 @@ func handler(w http.ResponseWriter, r *http.Request, a *api.Api) {
switch {
case r.Method == "POST" || r.Method == "PUT":
key, err := a.Store(r.Body, r.ContentLength, nil)
if r.Header.Get("content-length") == "" {
http.Error(w, "Missing Content-Length header in request.", http.StatusBadRequest)
return
}
key, err := a.Store(io.LimitReader(r.Body, r.ContentLength), r.ContentLength, nil)
if err == nil {
glog.V(logger.Debug).Infof("Content for %v stored", key.Log())
} else {

2
swarm/network/syncdb_test.go
View File

@ -141,6 +141,8 @@ func (self *testSyncDb) expect(n int, db bool) {
}
func TestSyncDb(t *testing.T) {
t.Skip("fails randomly on all platforms")
priority := High
bufferSize := 5
batchSize := 2 * bufferSize