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How to use ConnectStart method of httpext Package

Best K6 code snippet using httpext.ConnectStart

tracer.go

Source:tracer.go

...101// Trace returns a premade ClientTrace that calls all of the Tracer's hooks.102func (t *Tracer) Trace() *httptrace.ClientTrace {103	return &httptrace.ClientTrace{104		GetConn:              t.GetConn,105		ConnectStart:         t.ConnectStart,106		ConnectDone:          t.ConnectDone,107		TLSHandshakeStart:    t.TLSHandshakeStart,108		TLSHandshakeDone:     t.TLSHandshakeDone,109		GotConn:              t.GotConn,110		WroteRequest:         t.WroteRequest,111		GotFirstResponseByte: t.GotFirstResponseByte,112	}113}114// Add an error in a thread-safe way115func (t *Tracer) addError(err error) {116	t.protoErrorsMutex.Lock()117	defer t.protoErrorsMutex.Unlock()118	t.protoErrors = append(t.protoErrors, err)119}120func now() int64 {121	return time.Now().UnixNano()122}123// GetConn is called before a connection is created or124// retrieved from an idle pool. The hostPort is the125// "host:port" of the target or proxy. GetConn is called even126// if there's already an idle cached connection available.127//128// Keep in mind that GetConn won't be called if a connection129// is reused though, for example when there's a redirect.130// If it's called, it will be called before all other hooks.131func (t *Tracer) GetConn(hostPort string) {132	t.getConn = now()133}134// ConnectStart is called when a new connection's Dial begins.135// If net.Dialer.DualStack (IPv6 "Happy Eyeballs") support is136// enabled, this may be called multiple times.137//138// If the connection is reused, this won't be called. Otherwise,139// it will be called after GetConn() and before ConnectDone().140func (t *Tracer) ConnectStart(network, addr string) {141	// If using dual-stack dialing, it's possible to get this142	// multiple times, so the atomic compareAndSwap ensures143	// that only the first call's time is recorded144	atomic.CompareAndSwapInt64(&t.connectStart, 0, now())145}146// ConnectDone is called when a new connection's Dial147// completes. The provided err indicates whether the148// connection completedly successfully.149// If net.Dialer.DualStack ("Happy Eyeballs") support is150// enabled, this may be called multiple times.151//152// If the connection is reused, this won't be called. Otherwise,153// it will be called after ConnectStart() and before either154// TLSHandshakeStart() (for TLS connections) or GotConn().155func (t *Tracer) ConnectDone(network, addr string, err error) {156	// If using dual-stack dialing, it's possible to get this157	// multiple times, so the atomic compareAndSwap ensures158	// that only the first call's time is recorded159	if err == nil {160		atomic.CompareAndSwapInt64(&t.connectDone, 0, now())161	} else {162		t.addError(err)163	}164}165// TLSHandshakeStart is called when the TLS handshake is started. When166// connecting to a HTTPS site via a HTTP proxy, the handshake happens after167// the CONNECT request is processed by the proxy....

tracer_test.go

Source:tracer_test.go

...49		// HACK: Time resolution is not as accurate on Windows, see:50		//  https://github.com/golang/go/issues/868751		//  https://github.com/golang/go/issues/4108752		// Which seems to be causing some metrics to have a value of 0,53		// since e.g. ConnectStart and ConnectDone could register the same time.54		// So we force delays in the ClientTrace event handlers55		// to hopefully reduce the chances of this happening.56		ct = &httptrace.ClientTrace{57			ConnectStart: func(a, n string) {58				t.Logf("called ConnectStart at\t\t%v\n", now())59				time.Sleep(traceDelay)60				tracer.ConnectStart(a, n)61			},62			ConnectDone: func(a, n string, e error) {63				t.Logf("called ConnectDone at\t\t%v\n", now())64				time.Sleep(traceDelay)65				tracer.ConnectDone(a, n, e)66			},67			GetConn: func(h string) {68				t.Logf("called GetConn at\t\t%v\n", now())69				time.Sleep(traceDelay)70				tracer.GetConn(h)71			},72			GotConn: func(i httptrace.GotConnInfo) {73				t.Logf("called GotConn at\t\t%v\n", now())74				time.Sleep(traceDelay)...

ConnectStart

Using AI Code Generation

1import (2func main() {3    req := fasthttp.AcquireRequest()4    defer fasthttp.ReleaseRequest(req)5    req.Header.SetMethod("GET")6    req.Header.SetUserAgent("Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.85 Safari/537.36")7    req.Header.Set("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8")8    req.Header.Set("Accept-Encoding", "gzip, deflate, sdch")9    req.Header.Set("Accept-Language", "en-US,en;q=0.8")10    req.Header.Set("Cache-Control", "max-age=0")11    req.Header.Set("Connection", "keep-alive")12    req.Header.Set("DNT", "1")13    req.Header.Set("Host", "www.google.com")14    req.Header.Set("Upgrade-Insecure-Requests", "1")15    req.Header.Set("X-Forwarded-For", "

ConnectStart

Using AI Code Generation

1import (2func main() {3	req := fasthttp.AcquireRequest()4	resp := fasthttp.AcquireResponse()5	defer fasthttp.ReleaseRequest(req)6	defer fasthttp.ReleaseResponse(resp)7	req.Header.SetMethod("GET")8	err := fasthttp.Do(req, resp)9	if err != nil {10		fmt.Println("Error:", err)11	}12	fmt.Println("Response Status:", resp.StatusCode())13	fmt.Println("Response Headers:", resp.Header.String())14	fmt.Println("Response Body:", string(resp.Body()))15	fmt.Println("Request Header:", req.Header.String())16	fmt.Println("Request Body:", string(req.Body()))17}18import (19func main() {20	req := fasthttp.AcquireRequest()21	resp := fasthttp.AcquireResponse()22	defer fasthttp.ReleaseRequest(req)23	defer fasthttp.ReleaseResponse(resp)24	req.Header.SetMethod("GET")25	err := fasthttp.Do(req, resp)26	if err != nil {27		fmt.Println("Error:", err)28	}29	fmt.Println("Response Status:", resp.StatusCode())30	fmt.Println("Response Headers:", resp.Header.String())31	fmt.Println("Response Body:", string(resp.Body()))32	fmt.Println("Request Header:", req.Header.String())33	fmt.Println("Request Body:", string(req.Body()))34}

ConnectStart

Using AI Code Generation

1import (2func main() {3	trace := &httptrace.ClientTrace{4		ConnectStart: func(network, addr string) {5			fmt.Printf("Connecting to %s %s6		},7	}8	req = req.WithContext(httptrace.WithClientTrace(req.Context(), trace))9	client := &http.Client{}10	_, err := client.Do(req)11	if err != nil {12		fmt.Println(err)13	}14}

ConnectStart

Using AI Code Generation

1import (2func main() {3	start := time.Now()4	if err != nil {5		fmt.Println("Error", err)6	}7	defer resp.Body.Close()8	fmt.Println("Time to establish connection to google.com:", resp.ConnectionInfo().ConnectStart.Sub(start))9}

ConnectStart

Using AI Code Generation

1import (2func main() {3	req := fasthttp.AcquireRequest()4	req.SetRequestURI(url)5	req.Header.SetMethod(http.MethodGet)6	req.Header.Set("User-Agent", "fasthttp")7	resp := fasthttp.AcquireResponse()8	client := &fasthttp.Client{9	}10	err := client.Do(req, resp)11	if err != nil {12		fmt.Println("Error:", err)13	}14	fmt.Println("Response:", string(resp.Body()))15}

ConnectStart

Using AI Code Generation

1import (2func main() {3	client := &http.Client{}4	req, err := http.NewRequest("GET", url, nil)5	if err != nil {6		fmt.Println(err)7	}8	resp, err := client.Do(req)9	if err != nil {10		fmt.Println(err)11	}12	defer resp.Body.Close()13	fmt.Println(resp)14}15import (16func main() {17	req := fasthttp.AcquireRequest()18	req.SetRequestURI(url)19	req.Header.SetMethod("GET")20	resp := fasthttp.AcquireResponse()21	client := &fasthttp.Client{}22	err := client.Do(req, resp)23	if err != nil {24		fmt.Println(err)25	}26	fmt.Println(resp)27}28import (29func main() {30	req := fasthttp.AcquireRequest()31	req.SetRequestURI(url)32	req.Header.SetMethod("GET")33	resp := fasthttp.AcquireResponse()34	client := &fasthttp.HostClient{35	}36	err := client.Do(req, resp)37	if err != nil {38		fmt.Println(err)39	}40	fmt.Println(resp)41}42import (43func main() {44	req := fasthttp.AcquireRequest()45	req.SetRequestURI(url)46	req.Header.SetMethod("GET")47	resp := fasthttp.AcquireResponse()48	client := &fasthttp.Client{49	}50	err := client.Do(req, resp)51	if err != nil {52		fmt.Println(err)53	}54	fmt.Println(resp)55}56import (

ConnectStart

Using AI Code Generation

1import (2func main() {3    request := gorequest.New()4    request.ConnectStart(1000)5    if errs != nil {6        fmt.Println(errs)7    }8    fmt.Println(body)9}

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