diff --git a/client/client.go b/client/client.go index e36d108..1775241 100644 --- a/client/client.go +++ b/client/client.go @@ -8,18 +8,20 @@ import ( "errors" "fmt" "io" - "io/ioutil" "net/http" "net/url" "runtime" "time" - "github.com/m-lab/ndt5-client-go/mlabns" + "github.com/m-lab/locate/api/locate" + locatev2 "github.com/m-lab/locate/api/v2" "github.com/neubot/dash/internal" "github.com/neubot/dash/model" "github.com/neubot/dash/spec" ) +// TODO(bassosimone): we should define the version in a single place + const ( // libraryName is the name of this library libraryName = "neubot-dash" @@ -41,18 +43,42 @@ var ( errHTTPRequestFailed = errors.New("HTTP request failed") ) +// locator is an interface used to locate a server. +type locator interface { + Nearest(ctx context.Context, service string) ([]locatev2.Target, error) +} + +// dependencies contains mockable dependencies to test the client type dependencies struct { - Collect func(ctx context.Context, authorization string) error + // Collect allows to override the method performing the collect phase. + Collect func(ctx context.Context, authorization string, negotiateURL *url.URL) error + + // Download allows to override the method performing the download phase. Download func( ctx context.Context, authorization string, - current *model.ClientResults) error - HTTPClientDo func(req *http.Request) (*http.Response, error) + current *model.ClientResults, + negotiateURL *url.URL) error + + // HTTPClientDo allows to override calling [*http.Client.Do] in tests. + HTTPClientDo func(req *http.Request) (*http.Response, error) + + // HTTPNewRequest allows to override calling [http.NewRequest]. HTTPNewRequest func(method, url string, body io.Reader) (*http.Request, error) - IOUtilReadAll func(r io.Reader) ([]byte, error) - JSONMarshal func(v interface{}) ([]byte, error) - Locate func(ctx context.Context) (string, error) - Loop func(ctx context.Context, ch chan<- model.ClientResults) - Negotiate func(ctx context.Context) (model.NegotiateResponse, error) + + // IOReadAll allows to override calling [io.ReadAll]. + IOReadAll func(r io.Reader) ([]byte, error) + + // JSONUnmarshal allows to override calling [json.Unmarshal]. + JSONMarshal func(v interface{}) ([]byte, error) + + // Locator allows to override the [locator] to use. + Locator locator + + // Loop allows to override the method running the DASH client loop. + Loop func(ctx context.Context, ch chan<- model.ClientResults, negotiateURL *url.URL) + + // Negotiate allows to override the method performing the negotiate phase. + Negotiate func(ctx context.Context, negotiateURL *url.URL) (model.NegotiateResponse, error) } // Client is a DASH client. The zero value of this structure is @@ -67,7 +93,7 @@ type Client struct { ClientVersion string // FQDN is the server of the server to use. If the FQDN is not - // specified, we'll use mlab-ns to discover a server. + // specified, we use m-lab/locate/v2 to discover a server. FQDN string // HTTPClient is the HTTP client used by this implementation. This field @@ -78,21 +104,30 @@ type Client struct { // NewClient constructor to a do-nothing logger. Logger model.Logger - // MLabNSClient is the mlabns client. We'll configure it with a suitable - // implementation in NewClient, but you may override it. - MLabNSClient *mlabns.Client - // Scheme is the protocol scheme to use. By default NewClient configures // it to "https", but you can override it to "http". Scheme string - begin time.Time + // begin is when the test started. + begin time.Time + + // clientResults contains results collected by the client. clientResults []model.ClientResults - deps dependencies - err error + + // deps contains the mockable dependencies. + deps dependencies + + // err is the overall error that occurred. + err error + + // numIterations is the number of iterations to run. numIterations int64 + + // serverResults contains the server results. serverResults []model.ServerResults - userAgent string + + // userAgent is the user-agent HTTP header to use. + userAgent string } func makeUserAgent(clientName, clientVersion string) string { @@ -103,10 +138,6 @@ func (c *Client) httpClientDo(req *http.Request) (*http.Response, error) { return c.HTTPClient.Do(req) } -func (c *Client) locate(ctx context.Context) (string, error) { - return c.MLabNSClient.Query(ctx) -} - // New creates a new Client instance using the specified // client application name and version. func New(clientName, clientVersion string) (client *Client) { @@ -114,12 +145,16 @@ func New(clientName, clientVersion string) (client *Client) { client = &Client{ ClientName: clientName, ClientVersion: clientVersion, + FQDN: "", // user specified and defaults to empty HTTPClient: http.DefaultClient, Logger: internal.NoLogger{}, - MLabNSClient: mlabns.NewClient("neubot", ua), + Scheme: "https", begin: time.Now(), + clientResults: []model.ClientResults{}, + deps: dependencies{}, // initialized below + err: nil, numIterations: 15, - Scheme: "https", + serverResults: []model.ServerResults{}, userAgent: ua, } client.deps = dependencies{ @@ -127,9 +162,9 @@ func New(clientName, clientVersion string) (client *Client) { Download: client.download, HTTPClientDo: client.httpClientDo, HTTPNewRequest: http.NewRequest, - IOUtilReadAll: ioutil.ReadAll, + IOReadAll: io.ReadAll, JSONMarshal: json.Marshal, - Locate: client.locate, + Locator: locate.NewClient(ua), Loop: client.loop, Negotiate: client.negotiate, } @@ -139,7 +174,13 @@ func New(clientName, clientVersion string) (client *Client) { // negotiate is the preliminary phase of Neubot experiment where we connect // to the server, negotiate test parameters, and obtain an authorization // token that will be used by us and by the server to identify this experiment. -func (c *Client) negotiate(ctx context.Context) (model.NegotiateResponse, error) { +func (c *Client) negotiate( + ctx context.Context, + negotiateURL *url.URL, +) (model.NegotiateResponse, error) { + // 1. create the HTTP request + // + // TODO(bassosimone): use http.NewRequestWithContext var negotiateResponse model.NegotiateResponse data, err := c.deps.JSONMarshal(model.NegotiateRequest{ DASHRates: spec.DefaultRates, @@ -148,37 +189,51 @@ func (c *Client) negotiate(ctx context.Context) (model.NegotiateResponse, error) return negotiateResponse, err } c.Logger.Debugf("dash: body: %s", string(data)) - var URL url.URL - URL.Scheme = c.Scheme - URL.Host = c.FQDN - URL.Path = spec.NegotiatePath - req, err := c.deps.HTTPNewRequest("POST", URL.String(), bytes.NewReader(data)) + req, err := c.deps.HTTPNewRequest("POST", negotiateURL.String(), bytes.NewReader(data)) if err != nil { return negotiateResponse, err } - c.Logger.Debugf("dash: POST %s", URL.String()) + c.Logger.Debugf("dash: POST %s", negotiateURL.String()) req.Header.Set("User-Agent", c.userAgent) req.Header.Set("Content-Type", "application/json") req.Header.Set("Authorization", "") req = req.WithContext(ctx) + + // 2. send the request and receive the response headers resp, err := c.deps.HTTPClientDo(req) if err != nil { return negotiateResponse, err } + defer resp.Body.Close() + + // 3. handle the case where the status code indicates failure c.Logger.Debugf("dash: StatusCode: %d", resp.StatusCode) if resp.StatusCode != 200 { return negotiateResponse, errHTTPRequestFailed } - defer resp.Body.Close() - data, err = c.deps.IOUtilReadAll(resp.Body) + + // 4. read the raw response body + // + // TODO(bassosimone): + // + // a) protect against arbitrarily large bodies + // + // b) make sure the context can still interrupt a client otherwise + // with some amount of interference, we'll block here forever + data, err = c.deps.IOReadAll(resp.Body) if err != nil { return negotiateResponse, err } + + // 5. parse the response body c.Logger.Debugf("dash: body: %s", string(data)) err = json.Unmarshal(data, &negotiateResponse) if err != nil { return negotiateResponse, err } + + // 6. make sure that the server isn't busy + // // Implementation oddity: Neubot is using an integer rather than a // boolean for the unchoked, with obvious semantics. I wonder why // I choose an integer over a boolean, given that Python does have @@ -190,18 +245,30 @@ func (c *Client) negotiate(ctx context.Context) (model.NegotiateResponse, error) return negotiateResponse, nil } +// makeDownloadURL makes the download URL from the negotiate URL. +func makeDownloadURL(negotiateURL *url.URL, path string) *url.URL { + return &url.URL{ + Scheme: negotiateURL.Scheme, + Host: negotiateURL.Host, + Path: path, + } +} + // download implements the DASH test proper. We compute the number of bytes // to request given the current rate, download the fake DASH segment, and // then we return the measured performance of this segment to the caller. This // is repeated several times to emulate downloading part of a video. func (c *Client) download( - ctx context.Context, authorization string, current *model.ClientResults, + ctx context.Context, + authorization string, + current *model.ClientResults, + negotiateURL *url.URL, ) error { + // 1. create the HTTP request + // + // TODO(bassosimone): use http.NewRequestWithContext nbytes := (current.Rate * 1000 * current.ElapsedTarget) >> 3 - var URL url.URL - URL.Scheme = c.Scheme - URL.Host = c.FQDN - URL.Path = fmt.Sprintf("%s%d", spec.DownloadPath, nbytes) + URL := makeDownloadURL(negotiateURL, fmt.Sprintf("%s%d", spec.DownloadPath, nbytes)) req, err := c.deps.HTTPNewRequest("GET", URL.String(), nil) if err != nil { return err @@ -212,19 +279,35 @@ func (c *Client) download( req.Header.Set("Authorization", authorization) req = req.WithContext(ctx) savedTicks := time.Now() + + // 2. send the request and receive the response headers resp, err := c.deps.HTTPClientDo(req) if err != nil { return err } + defer resp.Body.Close() + + // 3. handle the case where the status code indicates failure c.Logger.Debugf("dash: StatusCode: %d", resp.StatusCode) if resp.StatusCode != 200 { return errHTTPRequestFailed } - defer resp.Body.Close() - data, err := c.deps.IOUtilReadAll(resp.Body) + + // 4. read the raw response body + // + // TODO(bassosimone): + // + // a) protect against arbitrarily large bodies + // + // b) make sure the context can still interrupt a client otherwise + // with some amount of interference, we'll block here forever + data, err := c.deps.IOReadAll(resp.Body) if err != nil { return err } + + // 5. compute performance metrics and update current + // // Implementation note: MK contains a comment that says that Neubot uses // the elapsed time since when we start receiving the response but it // turns out that Neubot and MK do the same. So, we do what they do. At @@ -234,22 +317,37 @@ func (c *Client) download( current.Received = int64(len(data)) current.RequestTicks = savedTicks.Sub(c.begin).Seconds() current.Timestamp = time.Now().Unix() + //c.Logger.Debugf("dash: current: %+v", current) /* for debugging */ return nil } +// makeCollectURL makes the collect URL from the negotiate URL. +func makeCollectURL(negotiateURL *url.URL) *url.URL { + return &url.URL{ + Scheme: negotiateURL.Scheme, + Host: negotiateURL.Host, + Path: spec.CollectPath, + } +} + // collect is the final phase of the test. We send to the server what we // measured and we receive back what it has measured. -func (c *Client) collect(ctx context.Context, authorization string) error { +func (c *Client) collect( + ctx context.Context, + authorization string, + negotiateURL *url.URL, +) error { + // 1. create the HTTP request including the JSON request body + // + // TODO(bassosimone): our request constructor should use http.NewRequestWithContext + // such that we don't actually need to set the context as a separate operation data, err := c.deps.JSONMarshal(c.clientResults) if err != nil { return err } c.Logger.Debugf("dash: body: %s", string(data)) - var URL url.URL - URL.Scheme = c.Scheme - URL.Host = c.FQDN - URL.Path = spec.CollectPath + URL := makeCollectURL(negotiateURL) req, err := c.deps.HTTPNewRequest("POST", URL.String(), bytes.NewReader(data)) if err != nil { return err @@ -259,40 +357,62 @@ func (c *Client) collect(ctx context.Context, authorization string) error { req.Header.Set("Content-Type", "application/json") req.Header.Set("Authorization", authorization) req = req.WithContext(ctx) + + // 2. send the request and receive the corresponding response headers resp, err := c.deps.HTTPClientDo(req) if err != nil { return err } + defer resp.Body.Close() + + // 3. handle the case where the status code indicates failure c.Logger.Debugf("dash: StatusCode: %d", resp.StatusCode) if resp.StatusCode != 200 { return errHTTPRequestFailed } - defer resp.Body.Close() - data, err = c.deps.IOUtilReadAll(resp.Body) + + // 4. read the raw response body + // + // TODO(bassosimone): + // + // a) protect against arbitrarily large bodies + // + // b) make sure the context can still interrupt a client otherwise + // with some amount of interference, we'll block here forever + data, err = c.deps.IOReadAll(resp.Body) if err != nil { return err } + + // 5. parse the response body and save it for the caller to see c.Logger.Debugf("dash: body: %s", string(data)) - err = json.Unmarshal(data, &c.serverResults) - if err != nil { - return err - } - return nil + return json.Unmarshal(data, &c.serverResults) } // loop is the main loop of the DASH test. It performs negotiation, the test // proper, and then collection. It posts interim results on |ch|. -func (c *Client) loop(ctx context.Context, ch chan<- model.ClientResults) { +func (c *Client) loop( + ctx context.Context, + ch chan<- model.ClientResults, + negotiateURL *url.URL, +) { + // 1. make sure we close the channel when done defer close(ch) + + // 2. negotiate an authorization token with the server + // // Implementation note: we will soon refactor the server to eliminate the // possiblity of keeping clients in queue. For this reason it's becoming // increasingly less important to loop waiting for the ready signal. Hence // if the server is busy, we just return a well known error. var negotiateResponse model.NegotiateResponse - negotiateResponse, c.err = c.deps.Negotiate(ctx) + negotiateResponse, c.err = c.deps.Negotiate(ctx, negotiateURL) if c.err != nil { return } + + // 3. run the measurement loop proper + // // Note: according to a comment in MK sources 3000 kbit/s was the // minimum speed recommended by Netflix for SD quality in 2017. // @@ -306,7 +426,7 @@ func (c *Client) loop(ctx context.Context, ch chan<- model.ClientResults) { Version: magicVersion, } for current.Iteration < c.numIterations { - c.err = c.deps.Download(ctx, negotiateResponse.Authorization, ¤t) + c.err = c.deps.Download(ctx, negotiateResponse.Authorization, ¤t, negotiateURL) if c.err != nil { return } @@ -318,7 +438,9 @@ func (c *Client) loop(ctx context.Context, ch chan<- model.ClientResults) { speed /= 1000.0 // to kbit/s current.Rate = int64(speed) } - c.err = c.deps.Collect(ctx, negotiateResponse.Authorization) + + // 4. submit the measurement results + c.err = c.deps.Collect(ctx, negotiateResponse.Authorization, negotiateURL) } // StartDownload starts the DASH download. It returns a channel where @@ -328,33 +450,69 @@ func (c *Client) loop(ctx context.Context, ch chan<- model.ClientResults) { // has somehow worked. You can see if there has been any error during // the experiment by using the Error function. func (c *Client) StartDownload(ctx context.Context) (<-chan model.ClientResults, error) { - if c.FQDN == "" { - c.Logger.Debug("dash: discovering server with mlabns") - fqdn, err := c.deps.Locate(ctx) + + // 1. use the provided FQDN or use m-lab/locate/v2 + var negotiateURL *url.URL + switch { + + // 1.1: the user manually specified the server FQDN + case c.FQDN != "": + negotiateURL = &url.URL{} + negotiateURL.Scheme = c.Scheme + negotiateURL.Host = c.FQDN + negotiateURL.Path = spec.NegotiatePath + + // 1.2: we're going to use m-lab/locate/v2 for discovering the server + default: + c.Logger.Debug("dash: discovering server with locate v2") + + targets, err := c.deps.Locator.Nearest(ctx, "neubot/dash") + if err != nil { + return nil, err + } + if len(targets) < 1 { + return nil, errors.New("no targets") + } + + URL := targets[0].URLs["https:///negotiate/dash"] + parsed, err := url.Parse(URL) if err != nil { return nil, err } - c.FQDN = fqdn + + negotiateURL = parsed } + + // 2. check for context being canceled + // + // this check is useful to write better tests if ctx.Err() != nil { - return nil, ctx.Err() // this line is useful to write better tests + return nil, ctx.Err() } - c.Logger.Debugf("dash: using server: %s", c.FQDN) + + // 3. run the client loop and return the resulting channel + c.Logger.Debugf("dash: using server: %v", negotiateURL) ch := make(chan model.ClientResults) - go c.deps.Loop(ctx, ch) + go c.deps.Loop(ctx, ch, negotiateURL) return ch, nil } // Error returns the error that occurred during the test, if any. A nil // return value means that all was good. A returned error does not however // necessarily mean that all was bad; you may have _some_ data. +// +// To avoid data races you MUST call this method after the channel +// returned by [*Client.StartDownload] has been drained. func (c *Client) Error() error { return c.err } // ServerResults returns the results of the experiment collected by the -// server. In case Error() returns non nil, this function will typically +// server. In case [*Client.Error] returns non nil, this function will typically // return an empty slice to the caller. +// +// To avoid data races you MUST call this method after the channel +// returned by [*Client.StartDownload] has been drained. func (c *Client) ServerResults() []model.ServerResults { return c.serverResults } diff --git a/client/client_test.go b/client/client_test.go index cb170a4..9ff8bab 100644 --- a/client/client_test.go +++ b/client/client_test.go @@ -5,12 +5,13 @@ import ( "context" "errors" "io" - "io/ioutil" "net/http" + "net/url" "strings" "sync" "testing" + locatev2 "github.com/m-lab/locate/api/v2" "github.com/neubot/dash/model" ) @@ -25,7 +26,7 @@ func TestClientNegotiate(t *testing.T) { client.deps.JSONMarshal = func(v interface{}) ([]byte, error) { return nil, errors.New("Mocked error") } - _, err := client.negotiate(context.Background()) + _, err := client.negotiate(context.Background(), &url.URL{}) if err == nil { t.Fatal("Expected an error here") } @@ -38,7 +39,7 @@ func TestClientNegotiate(t *testing.T) { ) (*http.Request, error) { return nil, errors.New("Mocked error") } - _, err := client.negotiate(context.Background()) + _, err := client.negotiate(context.Background(), &url.URL{}) if err == nil { t.Fatal("Expected an error here") } @@ -49,7 +50,7 @@ func TestClientNegotiate(t *testing.T) { client.deps.HTTPClientDo = func(req *http.Request) (*http.Response, error) { return nil, errors.New("Mocked error") } - _, err := client.negotiate(context.Background()) + _, err := client.negotiate(context.Background(), &url.URL{}) if err == nil { t.Fatal("Expected an error here") } @@ -60,26 +61,27 @@ func TestClientNegotiate(t *testing.T) { client.deps.HTTPClientDo = func(req *http.Request) (*http.Response, error) { return &http.Response{ StatusCode: 404, + Body: io.NopCloser(bytes.NewReader(nil)), }, nil } - _, err := client.negotiate(context.Background()) + _, err := client.negotiate(context.Background(), &url.URL{}) if err == nil { t.Fatal("Expected an error here") } }) - t.Run("ioutil.ReadAll failure", func(t *testing.T) { + t.Run("io.ReadAll failure", func(t *testing.T) { client := New(softwareName, softwareVersion) client.deps.HTTPClientDo = func(req *http.Request) (*http.Response, error) { return &http.Response{ StatusCode: 200, - Body: ioutil.NopCloser(bytes.NewReader(nil)), + Body: io.NopCloser(bytes.NewReader(nil)), }, nil } - client.deps.IOUtilReadAll = func(r io.Reader) ([]byte, error) { + client.deps.IOReadAll = func(r io.Reader) ([]byte, error) { return nil, errors.New("Mocked error") } - _, err := client.negotiate(context.Background()) + _, err := client.negotiate(context.Background(), &url.URL{}) if err == nil { t.Fatal("Expected an error here") } @@ -90,10 +92,10 @@ func TestClientNegotiate(t *testing.T) { client.deps.HTTPClientDo = func(req *http.Request) (*http.Response, error) { return &http.Response{ StatusCode: 200, - Body: ioutil.NopCloser(bytes.NewReader(nil)), + Body: io.NopCloser(bytes.NewReader(nil)), }, nil } - _, err := client.negotiate(context.Background()) + _, err := client.negotiate(context.Background(), &url.URL{}) if err == nil { t.Fatal("Expected an error here") } @@ -104,10 +106,10 @@ func TestClientNegotiate(t *testing.T) { client.deps.HTTPClientDo = func(req *http.Request) (*http.Response, error) { return &http.Response{ StatusCode: 200, - Body: ioutil.NopCloser(strings.NewReader("{}")), + Body: io.NopCloser(strings.NewReader("{}")), }, nil } - _, err := client.negotiate(context.Background()) + _, err := client.negotiate(context.Background(), &url.URL{}) if err == nil { t.Fatal("Expected an error here") } @@ -118,13 +120,13 @@ func TestClientNegotiate(t *testing.T) { client.deps.HTTPClientDo = func(req *http.Request) (*http.Response, error) { return &http.Response{ StatusCode: 200, - Body: ioutil.NopCloser(strings.NewReader(`{ + Body: io.NopCloser(strings.NewReader(`{ "Authorization": "0xdeadbeef", "Unchoked": 1 }`)), }, nil } - _, err := client.negotiate(context.Background()) + _, err := client.negotiate(context.Background(), &url.URL{}) if err != nil { t.Fatal(err) } @@ -140,7 +142,7 @@ func TestClientDownload(t *testing.T) { return nil, errors.New("Mocked error") } current := new(model.ClientResults) - err := client.download(context.Background(), "abc", current) + err := client.download(context.Background(), "abc", current, &url.URL{}) if err == nil { t.Fatal("Expected an error here") } @@ -152,7 +154,7 @@ func TestClientDownload(t *testing.T) { return nil, errors.New("Mocked error") } current := new(model.ClientResults) - err := client.download(context.Background(), "abc", current) + err := client.download(context.Background(), "abc", current, &url.URL{}) if err == nil { t.Fatal("Expected an error here") } @@ -163,28 +165,29 @@ func TestClientDownload(t *testing.T) { client.deps.HTTPClientDo = func(req *http.Request) (*http.Response, error) { return &http.Response{ StatusCode: 404, + Body: io.NopCloser(bytes.NewReader(nil)), }, nil } current := new(model.ClientResults) - err := client.download(context.Background(), "abc", current) + err := client.download(context.Background(), "abc", current, &url.URL{}) if err == nil { t.Fatal("Expected an error here") } }) - t.Run("ioutil.ReadAll failure", func(t *testing.T) { + t.Run("io.ReadAll failure", func(t *testing.T) { client := New(softwareName, softwareVersion) client.deps.HTTPClientDo = func(req *http.Request) (*http.Response, error) { return &http.Response{ StatusCode: 200, - Body: ioutil.NopCloser(bytes.NewReader(nil)), + Body: io.NopCloser(bytes.NewReader(nil)), }, nil } - client.deps.IOUtilReadAll = func(r io.Reader) ([]byte, error) { + client.deps.IOReadAll = func(r io.Reader) ([]byte, error) { return nil, errors.New("Mocked error") } current := new(model.ClientResults) - err := client.download(context.Background(), "abc", current) + err := client.download(context.Background(), "abc", current, &url.URL{}) if err == nil { t.Fatal("Expected an error here") } @@ -195,11 +198,11 @@ func TestClientDownload(t *testing.T) { client.deps.HTTPClientDo = func(req *http.Request) (*http.Response, error) { return &http.Response{ StatusCode: 200, - Body: ioutil.NopCloser(bytes.NewReader(nil)), + Body: io.NopCloser(bytes.NewReader(nil)), }, nil } current := new(model.ClientResults) - err := client.download(context.Background(), "abc", current) + err := client.download(context.Background(), "abc", current, &url.URL{}) if err != nil { t.Fatal(err) } @@ -212,7 +215,7 @@ func TestClientCollect(t *testing.T) { client.deps.JSONMarshal = func(v interface{}) ([]byte, error) { return nil, errors.New("Mocked error") } - err := client.collect(context.Background(), "abc") + err := client.collect(context.Background(), "abc", &url.URL{}) if err == nil { t.Fatal("Expected an error here") } @@ -225,7 +228,7 @@ func TestClientCollect(t *testing.T) { ) (*http.Request, error) { return nil, errors.New("Mocked error") } - err := client.collect(context.Background(), "abc") + err := client.collect(context.Background(), "abc", &url.URL{}) if err == nil { t.Fatal("Expected an error here") } @@ -236,7 +239,7 @@ func TestClientCollect(t *testing.T) { client.deps.HTTPClientDo = func(req *http.Request) (*http.Response, error) { return nil, errors.New("Mocked error") } - err := client.collect(context.Background(), "abc") + err := client.collect(context.Background(), "abc", &url.URL{}) if err == nil { t.Fatal("Expected an error here") } @@ -247,26 +250,27 @@ func TestClientCollect(t *testing.T) { client.deps.HTTPClientDo = func(req *http.Request) (*http.Response, error) { return &http.Response{ StatusCode: 404, + Body: io.NopCloser(bytes.NewReader(nil)), }, nil } - err := client.collect(context.Background(), "abc") + err := client.collect(context.Background(), "abc", &url.URL{}) if err == nil { t.Fatal("Expected an error here") } }) - t.Run("ioutil.ReadAll failure", func(t *testing.T) { + t.Run("io.ReadAll failure", func(t *testing.T) { client := New(softwareName, softwareVersion) client.deps.HTTPClientDo = func(req *http.Request) (*http.Response, error) { return &http.Response{ StatusCode: 200, - Body: ioutil.NopCloser(bytes.NewReader(nil)), + Body: io.NopCloser(bytes.NewReader(nil)), }, nil } - client.deps.IOUtilReadAll = func(r io.Reader) ([]byte, error) { + client.deps.IOReadAll = func(r io.Reader) ([]byte, error) { return nil, errors.New("Mocked error") } - err := client.collect(context.Background(), "abc") + err := client.collect(context.Background(), "abc", &url.URL{}) if err == nil { t.Fatal("Expected an error here") } @@ -277,10 +281,10 @@ func TestClientCollect(t *testing.T) { client.deps.HTTPClientDo = func(req *http.Request) (*http.Response, error) { return &http.Response{ StatusCode: 200, - Body: ioutil.NopCloser(bytes.NewReader(nil)), + Body: io.NopCloser(bytes.NewReader(nil)), }, nil } - err := client.collect(context.Background(), "abc") + err := client.collect(context.Background(), "abc", &url.URL{}) if err == nil { t.Fatal("Expected an error here") } @@ -291,10 +295,10 @@ func TestClientCollect(t *testing.T) { client.deps.HTTPClientDo = func(req *http.Request) (*http.Response, error) { return &http.Response{ StatusCode: 200, - Body: ioutil.NopCloser(strings.NewReader("[]")), + Body: io.NopCloser(strings.NewReader("[]")), }, nil } - err := client.collect(context.Background(), "abc") + err := client.collect(context.Background(), "abc", &url.URL{}) if err != nil { t.Fatal(err) } @@ -305,10 +309,10 @@ func TestClientLoop(t *testing.T) { t.Run("negotiate failure", func(t *testing.T) { ch := make(chan model.ClientResults) client := New(softwareName, softwareVersion) - client.deps.Negotiate = func(ctx context.Context) (model.NegotiateResponse, error) { + client.deps.Negotiate = func(ctx context.Context, negotiateURL *url.URL) (model.NegotiateResponse, error) { return model.NegotiateResponse{}, errors.New("Mocked error") } - client.loop(context.Background(), ch) + client.loop(context.Background(), ch, &url.URL{}) if client.err == nil { t.Fatal("Expected an error here") } @@ -317,15 +321,16 @@ func TestClientLoop(t *testing.T) { t.Run("download failure", func(t *testing.T) { ch := make(chan model.ClientResults) client := New(softwareName, softwareVersion) - client.deps.Negotiate = func(ctx context.Context) (model.NegotiateResponse, error) { + client.deps.Negotiate = func(ctx context.Context, negotiateURL *url.URL) (model.NegotiateResponse, error) { return model.NegotiateResponse{}, nil } client.deps.Download = func( - ctx context.Context, authorization string, current *model.ClientResults, + ctx context.Context, authorization string, + current *model.ClientResults, negotiateURL *url.URL, ) error { return errors.New("Mocked error") } - client.loop(context.Background(), ch) + client.loop(context.Background(), ch, &url.URL{}) if client.err == nil { t.Fatal("Expected an error here") } @@ -334,15 +339,16 @@ func TestClientLoop(t *testing.T) { t.Run("collect failure", func(t *testing.T) { ch := make(chan model.ClientResults) client := New(softwareName, softwareVersion) - client.deps.Negotiate = func(ctx context.Context) (model.NegotiateResponse, error) { + client.deps.Negotiate = func(ctx context.Context, negotiateURL *url.URL) (model.NegotiateResponse, error) { return model.NegotiateResponse{}, nil } client.deps.Download = func( - ctx context.Context, authorization string, current *model.ClientResults, + ctx context.Context, authorization string, + current *model.ClientResults, negotiateURL *url.URL, ) error { return nil } - client.deps.Collect = func(ctx context.Context, authorization string) error { + client.deps.Collect = func(ctx context.Context, authorization string, negotiateURL *url.URL) error { return errors.New("Mocked error") } var wg sync.WaitGroup @@ -353,7 +359,7 @@ func TestClientLoop(t *testing.T) { // drain channel } }() - client.loop(context.Background(), ch) + client.loop(context.Background(), ch, &url.URL{}) if client.err == nil { t.Fatal("Expected an error here") } @@ -361,12 +367,17 @@ func TestClientLoop(t *testing.T) { }) } +type failingLocator struct{} + +// Nearest implements locator. +func (f *failingLocator) Nearest(ctx context.Context, service string) ([]locatev2.Target, error) { + return nil, errors.New("mocked error") +} + func TestClientStartDownload(t *testing.T) { t.Run("mlabns failure", func(t *testing.T) { client := New(softwareName, softwareVersion) - client.deps.Locate = func(ctx context.Context) (string, error) { - return "", errors.New("Mocked error") - } + client.deps.Locator = &failingLocator{} ch, err := client.StartDownload(context.Background()) if err == nil { t.Fatal("Expected an error here") @@ -378,7 +389,7 @@ func TestClientStartDownload(t *testing.T) { t.Run("common case", func(t *testing.T) { client := New(softwareName, softwareVersion) - client.deps.Loop = func(ctx context.Context, ch chan<- model.ClientResults) { + client.deps.Loop = func(ctx context.Context, ch chan<- model.ClientResults, negotiateURL *url.URL) { close(ch) } ch, err := client.StartDownload(context.Background()) diff --git a/cmd/dash-client/main.go b/cmd/dash-client/main.go index 5a998e4..c7ce73b 100644 --- a/cmd/dash-client/main.go +++ b/cmd/dash-client/main.go @@ -2,13 +2,13 @@ // // Usage: // -// dash-client -y [-hostname ] [-timeout ] [-scheme ] +// dash-client -y [-hostname ] [-timeout ] [-scheme ] // // The `-y` flag indicates you have read the data policy and accept it. // // The `-hostname ` flag specifies to use the `name` hostname for // performing the dash test. The default is to autodiscover a suitable -// server by using Measurement Lab's locate service. +// server by using Measurement Lab's m-lab/locate/v2 API. // // The `-timeout ` flag specifies the time after which the // whole test is interrupted. The `` is a string suitable to @@ -44,14 +44,18 @@ const ( ) var ( - flagHostname = flag.String("hostname", "", "optional ndt7 server hostname") - flagTimeout = flag.Duration( + flagHostname = flag.String("hostname", "", "optional DASH server hostname") + + flagTimeout = flag.Duration( "timeout", defaultTimeout, "time after which the test is aborted") + flagScheme = flagx.Enum{ Options: []string{"https", "http"}, Value: "https", } - flagY = flag.Bool("y", false, "I have read and accept the privacy policy at https://github.com/neubot/dash/blob/master/PRIVACY.md") + + flagY = flag.Bool("y", false, + "I have read and accept the privacy policy at https://github.com/neubot/dash/blob/master/PRIVACY.md") ) func init() { diff --git a/go.mod b/go.mod index 1f08b9b..e6be176 100644 --- a/go.mod +++ b/go.mod @@ -7,7 +7,7 @@ require ( github.com/google/uuid v1.6.0 github.com/gorilla/handlers v1.5.2 github.com/m-lab/go v0.1.73 - github.com/m-lab/ndt5-client-go v0.1.0 + github.com/m-lab/locate v0.14.52 ) require ( diff --git a/go.sum b/go.sum index c555303..6d498ec 100644 --- a/go.sum +++ b/go.sum @@ -1,220 +1,86 @@ -cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= -cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= -cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU= -cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU= -cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY= -cloud.google.com/go v0.44.3/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY= -cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc= -cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0= -cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To= -cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4= -cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M= -cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc= -cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk= -cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o= -cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE= -cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc= -cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg= -cloud.google.com/go/bigquery v1.6.0/go.mod h1:hyFDG0qSGdHNz8Q6nDN8rYIkld0q/+5uBZaelxiDLfE= -cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE= -cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk= -cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I= -cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw= -cloud.google.com/go/pubsub v1.2.0/go.mod h1:jhfEVHT8odbXTkndysNHCcx0awwzvfOlguIAii9o8iA= -cloud.google.com/go/pubsub v1.3.1/go.mod h1:i+ucay31+CNRpDW4Lu78I4xXG+O1r/MAHgjpRVR+TSU= -cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw= -cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0ZeosJ0Rtdos= -cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohlUTyfDhBk= -dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU= -github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= -github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo= -github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc= -github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc= -github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0= -github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0= github.com/apex/log v1.9.0 h1:FHtw/xuaM8AgmvDDTI9fiwoAL25Sq2cxojnZICUU8l0= github.com/apex/log v1.9.0/go.mod h1:m82fZlWIuiWzWP04XCTXmnX0xRkYYbCdYn8jbJeLBEA= github.com/apex/logs v1.0.0/go.mod h1:XzxuLZ5myVHDy9SAmYpamKKRNApGj54PfYLcFrXqDwo= github.com/aphistic/golf v0.0.0-20180712155816-02c07f170c5a/go.mod h1:3NqKYiepwy8kCu4PNA+aP7WUV72eXWJeP9/r3/K9aLE= github.com/aphistic/sweet v0.2.0/go.mod h1:fWDlIh/isSE9n6EPsRmC0det+whmX6dJid3stzu0Xys= -github.com/araddon/dateparse v0.0.0-20200409225146-d820a6159ab1/go.mod h1:SLqhdZcd+dF3TEVL2RMoob5bBP5R1P1qkox+HtCBgGI= github.com/araddon/dateparse v0.0.0-20210429162001-6b43995a97de 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h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs= github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs= -github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI= -github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI= -github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU= -github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw= -github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc= -github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E= github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= -github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4= -github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4= -github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98= -github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c= github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4= github.com/felixge/httpsnoop v1.0.4 h1:NFTV2Zj1bL4mc9sqWACXbQFVBBg2W3GPvqp8/ESS2Wg= github.com/felixge/httpsnoop v1.0.4/go.mod h1:m8KPJKqk1gH5J9DgRY2ASl2lWCfGKXixSwevea8zH2U= github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo= -github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1/go.mod h1:vR7hzQXu2zJy9AVAgeJqvqgH9Q5CA+iKCZ2gyEVpxRU= -github.com/go-gl/glfw/v3.3/glfw 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