diff --git a/cmd/swarm/swarm-smoke/feed_upload_and_sync.go b/cmd/swarm/swarm-smoke/feed_upload_and_sync.go index 2c5e3fd235..59b7238099 100644 --- a/cmd/swarm/swarm-smoke/feed_upload_and_sync.go +++ b/cmd/swarm/swarm-smoke/feed_upload_and_sync.go @@ -2,13 +2,10 @@ package main import ( "bytes" - "context" "crypto/md5" "fmt" "io" "io/ioutil" - "net/http" - "net/http/httptrace" "os" "os/exec" "strings" @@ -18,13 +15,8 @@ import ( "github.com/ethereum/go-ethereum/common/hexutil" "github.com/ethereum/go-ethereum/crypto" "github.com/ethereum/go-ethereum/log" - "github.com/ethereum/go-ethereum/metrics" - "github.com/ethereum/go-ethereum/swarm/api/client" - "github.com/ethereum/go-ethereum/swarm/spancontext" "github.com/ethereum/go-ethereum/swarm/storage/feed" "github.com/ethereum/go-ethereum/swarm/testutil" - colorable "github.com/mattn/go-colorable" - opentracing "github.com/opentracing/opentracing-go" "github.com/pborman/uuid" cli "gopkg.in/urfave/cli.v1" ) @@ -33,27 +25,6 @@ const ( feedRandomDataLength = 8 ) -func cliFeedUploadAndSync(c *cli.Context) error { - metrics.GetOrRegisterCounter("feed-and-sync", nil).Inc(1) - log.Root().SetHandler(log.CallerFileHandler(log.LvlFilterHandler(log.Lvl(verbosity), log.StreamHandler(colorable.NewColorableStderr(), log.TerminalFormat(true))))) - - errc := make(chan error) - go func() { - errc <- feedUploadAndSync(c) - }() - - select { - case err := <-errc: - if err != nil { - metrics.GetOrRegisterCounter("feed-and-sync.fail", nil).Inc(1) - } - return err - case <-time.After(time.Duration(timeout) * time.Second): - metrics.GetOrRegisterCounter("feed-and-sync.timeout", nil).Inc(1) - return fmt.Errorf("timeout after %v sec", timeout) - } -} - // TODO: retrieve with manifest + extract repeating code func feedUploadAndSync(c *cli.Context) error { defer func(now time.Time) { log.Info("total time", "time", time.Since(now), "size (kb)", filesize) }(time.Now()) @@ -307,60 +278,3 @@ func feedUploadAndSync(c *cli.Context) error { return nil } - -func fetchFeed(topic string, user string, endpoint string, original []byte, ruid string) error { - ctx, sp := spancontext.StartSpan(context.Background(), "feed-and-sync.fetch") - defer sp.Finish() - - log.Trace("sleeping", "ruid", ruid) - time.Sleep(3 * time.Second) - - log.Trace("http get request (feed)", "ruid", ruid, "api", endpoint, "topic", topic, "user", user) - - var tn time.Time - reqUri := endpoint + "/bzz-feed:/?topic=" + topic + "&user=" + user - req, _ := http.NewRequest("GET", reqUri, nil) - - opentracing.GlobalTracer().Inject( - sp.Context(), - opentracing.HTTPHeaders, - opentracing.HTTPHeadersCarrier(req.Header)) - - trace := client.GetClientTrace("feed-and-sync - http get", "feed-and-sync", ruid, &tn) - - req = req.WithContext(httptrace.WithClientTrace(ctx, trace)) - transport := http.DefaultTransport - - //transport.TLSClientConfig = &tls.Config{InsecureSkipVerify: true} - - tn = time.Now() - res, err := transport.RoundTrip(req) - if err != nil { - log.Error(err.Error(), "ruid", ruid) - 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 -} diff --git a/cmd/swarm/swarm-smoke/main.go b/cmd/swarm/swarm-smoke/main.go index ebd0c97155..788021e47e 100644 --- a/cmd/swarm/swarm-smoke/main.go +++ b/cmd/swarm/swarm-smoke/main.go @@ -49,6 +49,7 @@ var ( verbosity int timeout int single bool + storeSize int ) func main() { @@ -122,6 +123,12 @@ func main() { Usage: "whether to fetch content from a single node or from all nodes", Destination: &single, }, + cli.IntFlag{ + Name: "store", + Value: 5000, + Usage: "individual node store size", + Destination: &storeSize, + }, } app.Flags = append(app.Flags, []cli.Flag{ @@ -140,19 +147,25 @@ func main() { Name: "upload_and_sync", Aliases: []string{"c"}, Usage: "upload and sync", - Action: cliUploadAndSync, + Action: wrapCliCommand("upload-and-sync", uploadAndSync), }, { Name: "feed_sync", Aliases: []string{"f"}, Usage: "feed update generate, upload and sync", - Action: cliFeedUploadAndSync, + Action: wrapCliCommand("feed-and-sync", feedUploadAndSync), }, { Name: "upload_speed", Aliases: []string{"u"}, Usage: "measure upload speed", - Action: cliUploadSpeed, + Action: wrapCliCommand("upload-speed", uploadSpeed), + }, + { + Name: "sliding_window", + Aliases: []string{"s"}, + Usage: "measure network aggregate capacity", + Action: wrapCliCommand("sliding-window", slidingWindow), }, } diff --git a/cmd/swarm/swarm-smoke/sliding_window.go b/cmd/swarm/swarm-smoke/sliding_window.go new file mode 100644 index 0000000000..3da3f12ce3 --- /dev/null +++ b/cmd/swarm/swarm-smoke/sliding_window.go @@ -0,0 +1,181 @@ +// 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 . + +package main + +import ( + "bytes" + "fmt" + "math/rand" + "sync" + "sync/atomic" + "time" + + "github.com/ethereum/go-ethereum/log" + "github.com/ethereum/go-ethereum/metrics" + "github.com/ethereum/go-ethereum/swarm/testutil" + "github.com/pborman/uuid" + + cli "gopkg.in/urfave/cli.v1" +) + +type uploadResult struct { + hash string + digest []byte +} + +func slidingWindow(c *cli.Context) error { + // test dscription: + // 1. upload repeatedly the same file size, maintain a slice in which swarm hashes are stored, first hash at idx=0 + // 2. select a random node, start downloading the hashes, starting with the LAST one first (it should always be availble), till the FIRST hash + // 3. when + + defer func(now time.Time) { + totalTime := time.Since(now) + + log.Info("total time", "time", totalTime) + metrics.GetOrRegisterCounter("sliding-window.total-time", nil).Inc(int64(totalTime)) + }(time.Now()) + + generateEndpoints(scheme, cluster, appName, from, to) + storeSize = storeSize * 4096 //store size is in chunks - transform to bytes + hashes := []uploadResult{} //swarm hashes of the uploads + filesize := storeSize / 7 //each file to upload, bytes + nodes := to - from + networkCapacity := float64(storeSize) * float64(nodes) + const iterationTimeout = 30 * time.Second + log.Info("sliding window test started", "store size(kb)", int(storeSize/1000), "nodes", nodes, "filesize(kb)", int(filesize/1000), "network capacity(kb)", int(networkCapacity/1000), "timeout", timeout) + uploadedBytes := 0 + for uploadedBytes = 0; uploadedBytes <= int(networkCapacity); uploadedBytes += filesize { + seed := int(time.Now().UnixNano() / 1e6) + log.Info("uploading to "+endpoints[0]+" and syncing", "seed", seed) + + randomBytes := testutil.RandomBytes(seed, filesize) + + t1 := time.Now() + hash, err := upload(&randomBytes, endpoints[0]) + if err != nil { + log.Error(err.Error()) + return err + } + metrics.GetOrRegisterCounter("sliding-window.upload-time", nil).Inc(int64(time.Since(t1))) + + fhash, err := digest(bytes.NewReader(randomBytes)) + if err != nil { + log.Error(err.Error()) + return err + } + + log.Info("uploaded successfully", "hash", hash, "digest", fmt.Sprintf("%x", fhash)) + hashes = append(hashes, uploadResult{hash: hash, digest: fhash}) + } + + log.Info("done uploading files", "len(hashes)", len(hashes), "sleep for", syncDelay) + + time.Sleep(time.Duration(syncDelay) * time.Second) + + networkDepth := 0 + var errored int32 = 0 + + timedOut := false + +LOOP: + for i := len(hashes) - 1; i >= 0; i-- { + wg := sync.WaitGroup{} + done := time.After(iterationTimeout) + if single { + rand.Seed(time.Now().UTC().UnixNano()) + randIndex := 1 + rand.Intn(len(endpoints)-1) + ruid := uuid.New()[:8] + wg.Add(1) + go func(endpoint string, ruid string) { + // points to address: + // need to measure min/max/mean for the results when not in single mode (not all nodes would necessarily give the same result, though they should) + defer wg.Done() + + inner: + for { + select { + case <-done: + metrics.GetOrRegisterCounter("sliding-window.single.timeout", nil).Inc(1) + atomic.AddInt32(&errored, 1) + break inner + default: + } + + start := time.Now() + err := fetch(hashes[i].hash, endpoint, hashes[i].digest, ruid) + fetchTime := time.Since(start) + if err != nil { + continue + } + + metrics.GetOrRegisterMeter("sliding-window.single.fetch-time", nil).Mark(int64(fetchTime)) + return + } + + }(endpoints[randIndex], ruid) + } else { + for _, endpoint := range endpoints { + ruid := uuid.New()[:8] + wg.Add(1) + go func(endpoint string, ruid string) { + defer wg.Done() + + inner: + for { + select { + case <-done: + metrics.GetOrRegisterCounter("sliding-window.multi.timeout", nil).Inc(1) + atomic.AddInt32(&errored, 1) + break inner + default: + } + + start := time.Now() + err := fetch(hashes[i].hash, endpoint, hashes[i].digest, ruid) + fetchTime := time.Since(start) + if err != nil { + continue + } + + metrics.GetOrRegisterMeter("sliding-window.each.fetch-time", nil).Mark(int64(fetchTime)) + return + } + }(endpoint, ruid) + } + } + + wg.Wait() + networkDepth = len(hashes) - i + if errored > 0 { + break LOOP + } + select { + case <-done: + timedOut = true + break LOOP + default: + } + } + + log.Info("sliding window test finished", "timed out?", timedOut, "errored?", errored > 0, "networkDepth", networkDepth, "networkDepth(kb)", int(networkDepth*filesize/1000)) + log.Info("stats", "uploadedFiles", len(hashes), "uploadedKb", uploadedBytes/1000, "filesizeKb", filesize/1000, "networkCapacityKb", int(networkCapacity/1000), "networkCapacityMb", int(networkCapacity/1000000)) + + metrics.GetOrRegisterMeter("sliding-window.network-depth", nil).Mark(int64(networkDepth)) + metrics.GetOrRegisterMeter("sliding-window.uploaded-bytes", nil).Mark(int64(uploadedBytes)) + return nil +} diff --git a/cmd/swarm/swarm-smoke/upload_and_sync.go b/cmd/swarm/swarm-smoke/upload_and_sync.go index 0fc86c55d7..567363a17a 100644 --- a/cmd/swarm/swarm-smoke/upload_and_sync.go +++ b/cmd/swarm/swarm-smoke/upload_and_sync.go @@ -18,75 +18,19 @@ package main import ( "bytes" - "context" - "crypto/md5" - crand "crypto/rand" - "errors" "fmt" - "io" - "io/ioutil" "math/rand" - "net/http" - "net/http/httptrace" - "os" "sync" "time" "github.com/ethereum/go-ethereum/log" "github.com/ethereum/go-ethereum/metrics" - "github.com/ethereum/go-ethereum/swarm/api" - "github.com/ethereum/go-ethereum/swarm/api/client" - "github.com/ethereum/go-ethereum/swarm/spancontext" "github.com/ethereum/go-ethereum/swarm/testutil" - opentracing "github.com/opentracing/opentracing-go" "github.com/pborman/uuid" cli "gopkg.in/urfave/cli.v1" ) -func generateEndpoints(scheme string, cluster string, app string, from int, to int) { - if cluster == "prod" { - for port := from; port < to; port++ { - endpoints = append(endpoints, fmt.Sprintf("%s://%v.swarm-gateways.net", scheme, port)) - } - } else if cluster == "private-internal" { - for port := from; port < to; port++ { - endpoints = append(endpoints, fmt.Sprintf("%s://swarm-private-internal-%v:8500", scheme, port)) - } - } else { - for port := from; port < to; port++ { - endpoints = append(endpoints, fmt.Sprintf("%s://%s-%v-%s.stg.swarm-gateways.net", scheme, app, port, cluster)) - } - } - - if includeLocalhost { - endpoints = append(endpoints, "http://localhost:8500") - } -} - -func cliUploadAndSync(c *cli.Context) error { - log.PrintOrigins(true) - log.Root().SetHandler(log.LvlFilterHandler(log.Lvl(verbosity), log.StreamHandler(os.Stdout, log.TerminalFormat(true)))) - - metrics.GetOrRegisterCounter("upload-and-sync", nil).Inc(1) - - errc := make(chan error) - go func() { - errc <- uploadAndSync(c) - }() - - select { - case err := <-errc: - if err != nil { - metrics.GetOrRegisterCounter("upload-and-sync.fail", nil).Inc(1) - } - return err - case <-time.After(time.Duration(timeout) * time.Second): - metrics.GetOrRegisterCounter("upload-and-sync.timeout", nil).Inc(1) - return fmt.Errorf("timeout after %v sec", timeout) - } -} - func uploadAndSync(c *cli.Context) error { defer func(now time.Time) { totalTime := time.Since(now) @@ -161,96 +105,3 @@ func uploadAndSync(c *cli.Context) error { 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 { - ctx, sp := spancontext.StartSpan(context.Background(), "upload-and-sync.fetch") - defer sp.Finish() - - log.Trace("http get request", "ruid", ruid, "api", endpoint, "hash", hash) - - var tn time.Time - reqUri := endpoint + "/bzz:/" + hash + "/" - req, _ := http.NewRequest("GET", reqUri, nil) - - opentracing.GlobalTracer().Inject( - sp.Context(), - opentracing.HTTPHeaders, - opentracing.HTTPHeadersCarrier(req.Header)) - - trace := client.GetClientTrace("upload-and-sync - http get", "upload-and-sync", ruid, &tn) - - req = req.WithContext(httptrace.WithClientTrace(ctx, trace)) - transport := http.DefaultTransport - - //transport.TLSClientConfig = &tls.Config{InsecureSkipVerify: true} - - tn = time.Now() - res, err := transport.RoundTrip(req) - if err != nil { - log.Error(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(dataBytes *[]byte, endpoint string) (string, error) { - swarm := client.NewClient(endpoint) - f := &client.File{ - ReadCloser: ioutil.NopCloser(bytes.NewReader(*dataBytes)), - ManifestEntry: api.ManifestEntry{ - ContentType: "text/plain", - Mode: 0660, - Size: int64(len(*dataBytes)), - }, - } - - // upload data to bzz:// and retrieve the content-addressed manifest hash, hex-encoded. - return swarm.Upload(f, "", false) -} - -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 -} - -// generates random data in heap buffer -func generateRandomData(datasize int) ([]byte, error) { - b := make([]byte, datasize) - c, err := crand.Read(b) - if err != nil { - return nil, err - } else if c != datasize { - return nil, errors.New("short read") - } - return b, nil -} diff --git a/cmd/swarm/swarm-smoke/upload_speed.go b/cmd/swarm/swarm-smoke/upload_speed.go index 4a355baf82..ed6256753c 100644 --- a/cmd/swarm/swarm-smoke/upload_speed.go +++ b/cmd/swarm/swarm-smoke/upload_speed.go @@ -19,7 +19,6 @@ package main import ( "bytes" "fmt" - "os" "time" "github.com/ethereum/go-ethereum/log" @@ -29,42 +28,6 @@ import ( cli "gopkg.in/urfave/cli.v1" ) -var endpoint string - -//just use the first endpoint -func generateEndpoint(scheme string, cluster string, app string, from int) { - if cluster == "prod" { - endpoint = fmt.Sprintf("%s://%v.swarm-gateways.net", scheme, from) - } else if cluster == "private-internal" { - endpoint = fmt.Sprintf("%s://swarm-private-internal-%v:8500", scheme, from) - } else { - endpoint = fmt.Sprintf("%s://%s-%v-%s.stg.swarm-gateways.net", scheme, app, from, cluster) - } -} - -func cliUploadSpeed(c *cli.Context) error { - log.PrintOrigins(true) - log.Root().SetHandler(log.LvlFilterHandler(log.Lvl(verbosity), log.StreamHandler(os.Stdout, log.TerminalFormat(true)))) - - metrics.GetOrRegisterCounter("upload-speed", nil).Inc(1) - - errc := make(chan error) - go func() { - errc <- uploadSpeed(c) - }() - - select { - case err := <-errc: - if err != nil { - metrics.GetOrRegisterCounter("upload-speed.fail", nil).Inc(1) - } - return err - case <-time.After(time.Duration(timeout) * time.Second): - metrics.GetOrRegisterCounter("upload-speed.timeout", nil).Inc(1) - return fmt.Errorf("timeout after %v sec", timeout) - } -} - func uploadSpeed(c *cli.Context) error { defer func(now time.Time) { totalTime := time.Since(now) @@ -73,7 +36,7 @@ func uploadSpeed(c *cli.Context) error { metrics.GetOrRegisterCounter("upload-speed.total-time", nil).Inc(int64(totalTime)) }(time.Now()) - generateEndpoint(scheme, cluster, appName, from) + endpoint := generateEndpoint(scheme, cluster, appName, from) seed := int(time.Now().UnixNano() / 1e6) log.Info("uploading to "+endpoint, "seed", seed) diff --git a/cmd/swarm/swarm-smoke/util.go b/cmd/swarm/swarm-smoke/util.go new file mode 100644 index 0000000000..4e92447b57 --- /dev/null +++ b/cmd/swarm/swarm-smoke/util.go @@ -0,0 +1,240 @@ +// 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 . + +package main + +import ( + "bytes" + "context" + "crypto/md5" + crand "crypto/rand" + "errors" + "fmt" + "io" + "io/ioutil" + "net/http" + "net/http/httptrace" + "os" + "time" + + "github.com/ethereum/go-ethereum/log" + "github.com/ethereum/go-ethereum/metrics" + "github.com/ethereum/go-ethereum/swarm/api" + "github.com/ethereum/go-ethereum/swarm/api/client" + "github.com/ethereum/go-ethereum/swarm/spancontext" + opentracing "github.com/opentracing/opentracing-go" + cli "gopkg.in/urfave/cli.v1" +) + +func wrapCliCommand(name string, command func(*cli.Context) error) func(*cli.Context) error { + return func(ctx *cli.Context) error { + log.PrintOrigins(true) + log.Root().SetHandler(log.LvlFilterHandler(log.Lvl(verbosity), log.StreamHandler(os.Stdout, log.TerminalFormat(true)))) + log.Info("smoke test starting", "task", name, "timeout", timeout) + metrics.GetOrRegisterCounter(name, nil).Inc(1) + + errc := make(chan error) + go func() { + errc <- command(ctx) + }() + + select { + case err := <-errc: + if err != nil { + metrics.GetOrRegisterCounter(fmt.Sprintf("%s.fail", name), nil).Inc(1) + } + return err + case <-time.After(time.Duration(timeout) * time.Second): + metrics.GetOrRegisterCounter(fmt.Sprintf("%s.timeout", name), nil).Inc(1) + return fmt.Errorf("timeout after %v sec", timeout) + } + } +} + +func generateEndpoints(scheme string, cluster string, app string, from int, to int) { + if cluster == "prod" { + for port := from; port < to; port++ { + endpoints = append(endpoints, fmt.Sprintf("%s://%v.swarm-gateways.net", scheme, port)) + } + } else { + for port := from; port < to; port++ { + endpoints = append(endpoints, fmt.Sprintf("%s://%s-%v-%s.stg.swarm-gateways.net", scheme, app, port, cluster)) + } + } + + if includeLocalhost { + endpoints = append(endpoints, "http://localhost:8500") + } +} + +//just use the first endpoint +func generateEndpoint(scheme string, cluster string, app string, from int) string { + if cluster == "prod" { + return fmt.Sprintf("%s://%v.swarm-gateways.net", scheme, from) + } else { + return fmt.Sprintf("%s://%s-%v-%s.stg.swarm-gateways.net", scheme, app, from, cluster) + } +} + +func fetchFeed(topic string, user string, endpoint string, original []byte, ruid string) error { + ctx, sp := spancontext.StartSpan(context.Background(), "feed-and-sync.fetch") + defer sp.Finish() + + log.Trace("sleeping", "ruid", ruid) + time.Sleep(3 * time.Second) + + log.Trace("http get request (feed)", "ruid", ruid, "api", endpoint, "topic", topic, "user", user) + + var tn time.Time + reqUri := endpoint + "/bzz-feed:/?topic=" + topic + "&user=" + user + req, _ := http.NewRequest("GET", reqUri, nil) + + opentracing.GlobalTracer().Inject( + sp.Context(), + opentracing.HTTPHeaders, + opentracing.HTTPHeadersCarrier(req.Header)) + + trace := client.GetClientTrace("feed-and-sync - http get", "feed-and-sync", ruid, &tn) + + req = req.WithContext(httptrace.WithClientTrace(ctx, trace)) + transport := http.DefaultTransport + + //transport.TLSClientConfig = &tls.Config{InsecureSkipVerify: true} + + tn = time.Now() + res, err := transport.RoundTrip(req) + if err != nil { + log.Error(err.Error(), "ruid", ruid) + 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 +} + +// 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 { + ctx, sp := spancontext.StartSpan(context.Background(), "upload-and-sync.fetch") + defer sp.Finish() + + log.Trace("http get request", "ruid", ruid, "api", endpoint, "hash", hash) + + var tn time.Time + reqUri := endpoint + "/bzz:/" + hash + "/" + req, _ := http.NewRequest("GET", reqUri, nil) + + opentracing.GlobalTracer().Inject( + sp.Context(), + opentracing.HTTPHeaders, + opentracing.HTTPHeadersCarrier(req.Header)) + + trace := client.GetClientTrace("upload-and-sync - http get", "upload-and-sync", ruid, &tn) + + req = req.WithContext(httptrace.WithClientTrace(ctx, trace)) + transport := http.DefaultTransport + + //transport.TLSClientConfig = &tls.Config{InsecureSkipVerify: true} + + tn = time.Now() + res, err := transport.RoundTrip(req) + if err != nil { + log.Error(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 an arbitrary byte as a plaintext file to `endpoint` using the api client +func upload(dataBytes *[]byte, endpoint string) (string, error) { + swarm := client.NewClient(endpoint) + f := &client.File{ + ReadCloser: ioutil.NopCloser(bytes.NewReader(*dataBytes)), + ManifestEntry: api.ManifestEntry{ + ContentType: "text/plain", + Mode: 0660, + Size: int64(len(*dataBytes)), + }, + } + + // upload data to bzz:// and retrieve the content-addressed manifest hash, hex-encoded. + return swarm.Upload(f, "", false) +} + +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 +} + +// generates random data in heap buffer +func generateRandomData(datasize int) ([]byte, error) { + b := make([]byte, datasize) + c, err := crand.Read(b) + if err != nil { + return nil, err + } else if c != datasize { + return nil, errors.New("short read") + } + return b, nil +}