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How to use GotConn method of httpext Package

Best K6 code snippet using httpext.GotConn

tracer.go

Source:tracer.go

...102		ConnectStart:         t.ConnectStart,103		ConnectDone:          t.ConnectDone,104		TLSHandshakeStart:    t.TLSHandshakeStart,105		TLSHandshakeDone:     t.TLSHandshakeDone,106		GotConn:              t.GotConn,107		WroteRequest:         t.WroteRequest,108		GotFirstResponseByte: t.GotFirstResponseByte,109	}110}111func now() int64 {112	return time.Now().UnixNano()113}114// GetConn is called before a connection is created or115// retrieved from an idle pool. The hostPort is the116// "host:port" of the target or proxy. GetConn is called even117// if there's already an idle cached connection available.118//119// Keep in mind that GetConn won't be called if a connection120// is reused though, for example when there's a redirect.121// If it's called, it will be called before all other hooks.122func (t *Tracer) GetConn(hostPort string) {123	t.getConn = now()124}125// ConnectStart is called when a new connection's Dial begins.126// If net.Dialer.DualStack (IPv6 "Happy Eyeballs") support is127// enabled, this may be called multiple times.128//129// If the connection is reused, this won't be called. Otherwise,130// it will be called after GetConn() and before ConnectDone().131func (t *Tracer) ConnectStart(network, addr string) {132	// If using dual-stack dialing, it's possible to get this133	// multiple times, so the atomic compareAndSwap ensures134	// that only the first call's time is recorded135	atomic.CompareAndSwapInt64(&t.connectStart, 0, now())136}137// ConnectDone is called when a new connection's Dial138// completes. The provided err indicates whether the139// connection completedly successfully.140// If net.Dialer.DualStack ("Happy Eyeballs") support is141// enabled, this may be called multiple times.142//143// If the connection is reused, this won't be called. Otherwise,144// it will be called after ConnectStart() and before either145// TLSHandshakeStart() (for TLS connections) or GotConn().146func (t *Tracer) ConnectDone(network, addr string, err error) {147	// If using dual-stack dialing, it's possible to get this148	// multiple times, so the atomic compareAndSwap ensures149	// that only the first call's time is recorded150	if err == nil {151		atomic.CompareAndSwapInt64(&t.connectDone, 0, now())152	}153	// if there is an error it either is happy eyeballs related and doesn't matter or it will be154	// returned by the http call155}156// TLSHandshakeStart is called when the TLS handshake is started. When157// connecting to a HTTPS site via a HTTP proxy, the handshake happens after158// the CONNECT request is processed by the proxy.159//160// If the connection is reused, this won't be called. Otherwise,161// it will be called after ConnectDone() and before TLSHandshakeDone().162func (t *Tracer) TLSHandshakeStart() {163	atomic.CompareAndSwapInt64(&t.tlsHandshakeStart, 0, now())164}165// TLSHandshakeDone is called after the TLS handshake with either the166// successful handshake's connection state, or a non-nil error on handshake167// failure.168//169// If the connection is reused, this won't be called. Otherwise,170// it will be called after TLSHandshakeStart() and before GotConn().171// If the request was cancelled, this could be called after the172// RoundTrip() method has returned.173func (t *Tracer) TLSHandshakeDone(state tls.ConnectionState, err error) {174	if err == nil {175		atomic.CompareAndSwapInt64(&t.tlsHandshakeDone, 0, now())176	}177	// if there is an error it will be returned by the http call178}179// GotConn is called after a successful connection is180// obtained. There is no hook for failure to obtain a181// connection; instead, use the error from Transport.RoundTrip.182//183// This is the fist hook called for reused connections. For new184// connections, it's called either after TLSHandshakeDone()185// (for TLS connections) or after ConnectDone()186func (t *Tracer) GotConn(info httptrace.GotConnInfo) {187	now := now()188	// This shouldn't be called multiple times so no synchronization here,189	// it's better for the race detector to panic if we're wrong.190	t.gotConn = now191	t.connReused = info.Reused192	t.connRemoteAddr = info.Conn.RemoteAddr()193	// The Go stdlib's http module can start connecting to a remote server, only194	// to abandon that connection even before it was fully established and reuse195	// a recently freed already existing connection.196	// We overwrite the different timestamps here, so the other callbacks don't197	// put incorrect values in them (they use CompareAndSwap)198	_, isConnTLS := info.Conn.(*tls.Conn)199	if info.Reused {200		atomic.SwapInt64(&t.connectStart, now)201		atomic.SwapInt64(&t.connectDone, now)202		if isConnTLS {203			atomic.SwapInt64(&t.tlsHandshakeStart, now)204			atomic.SwapInt64(&t.tlsHandshakeDone, now)205		}206	} else {207		// There's a bug in the Go stdlib where an HTTP/2 connection can be reused208		// but the httptrace.GotConnInfo struct will contain a false Reused property...209		// That's probably from a previously made connection that was abandoned and210		// directly put in the connection pool in favor of a just-freed already211		// established connection...212		//213		// Using CompareAndSwap here because the HTTP/2 roundtripper has retries and214		// it's possible this isn't actually the first request attempt...215		atomic.CompareAndSwapInt64(&t.connectStart, 0, now)216		atomic.CompareAndSwapInt64(&t.connectDone, 0, now)217		if isConnTLS {218			atomic.CompareAndSwapInt64(&t.tlsHandshakeStart, 0, now)219			atomic.CompareAndSwapInt64(&t.tlsHandshakeDone, 0, now)220		}221	}222}223// WroteRequest is called with the result of writing the224// request and any body. It may be called multiple times225// in the case of retried requests.226func (t *Tracer) WroteRequest(info httptrace.WroteRequestInfo) {227	if info.Err == nil {228		atomic.StoreInt64(&t.wroteRequest, now())229	}230	// if there is an error it will be returned by the http call231}232// GotFirstResponseByte is called when the first byte of the response233// headers is available.234// If the request was cancelled, this could be called after the235// RoundTrip() method has returned.236func (t *Tracer) GotFirstResponseByte() {237	atomic.CompareAndSwapInt64(&t.gotFirstResponseByte, 0, now())238}239// Done calculates all metrics and should be called when the request is finished.240func (t *Tracer) Done() *Trail {241	done := time.Now()242	trail := Trail{243		ConnReused:     t.connReused,244		ConnRemoteAddr: t.connRemoteAddr,245	}246	if t.gotConn != 0 && t.getConn != 0 && t.gotConn > t.getConn {247		trail.Blocked = time.Duration(t.gotConn - t.getConn)248	}249	// It's possible for some of the methods of httptrace.ClientTrace to250	// actually be called after the http.Client or http.RoundTripper have251	// already returned our result and we've called Done(). This happens252	// mostly for cancelled requests, but we have to use atomics here as253	// well (or use global Tracer locking) so we can avoid data races.254	connectStart := atomic.LoadInt64(&t.connectStart)255	connectDone := atomic.LoadInt64(&t.connectDone)256	tlsHandshakeStart := atomic.LoadInt64(&t.tlsHandshakeStart)257	tlsHandshakeDone := atomic.LoadInt64(&t.tlsHandshakeDone)258	gotConn := atomic.LoadInt64(&t.gotConn)259	wroteRequest := atomic.LoadInt64(&t.wroteRequest)260	gotFirstResponseByte := atomic.LoadInt64(&t.gotFirstResponseByte)261	if connectDone != 0 && connectStart != 0 {262		trail.Connecting = time.Duration(connectDone - connectStart)263	}264	if tlsHandshakeDone != 0 && tlsHandshakeStart != 0 {265		trail.TLSHandshaking = time.Duration(tlsHandshakeDone - tlsHandshakeStart)266	}267	if wroteRequest != 0 {268		if tlsHandshakeDone != 0 {269			// If the request was sent over TLS, we need to use270			// TLS Handshake Done time to calculate sending duration271			trail.Sending = time.Duration(wroteRequest - tlsHandshakeDone)272		} else if connectDone != 0 {273			// Otherwise, use the end of the normal connection274			trail.Sending = time.Duration(wroteRequest - connectDone)275		} else {276			// Finally, this handles the strange HTTP/2 case where the GotConn() hook277			// gets called first, but with Reused=false278			trail.Sending = time.Duration(wroteRequest - gotConn)279		}280		if gotFirstResponseByte != 0 {281			// We started receiving at least some response back282			if gotFirstResponseByte > wroteRequest {283				// For some requests, especially HTTP/2, the server starts responding before the284				// client has finished sending the full request285				trail.Waiting = time.Duration(gotFirstResponseByte - wroteRequest)286			}287		} else {288			// The server never responded to our request289			trail.Waiting = done.Sub(time.Unix(0, wroteRequest))290		}...

GotConn

Using AI Code Generation

1import (2func main() {3	c := &http.Client{4		Transport: &http.Transport{5		},6	}7	for {8		if err != nil {9			fmt.Println(err)10		}11		time.Sleep(1 * time.Second)12	}13}14import (15func main() {16	c := &http.Client{17	}18	for {19		if err != nil {20			fmt.Println(err)21		}22		time.Sleep(1 * time.Second)23	}24}25import (26func main() {27	c := &http.Client{28	}29	for {30		if err != nil {31			fmt.Println(err)32		}33		_, err = c.Do(req)34		if err != nil {35			fmt.Println(err)36		}37		time.Sleep(1 * time.Second)38	}39}40import (41func main() {42	c := &http.Client{43	}44	for {45		if err != nil {46			fmt.Println(err)47		}48		resp, err := c.Do(req)49		if err != nil {50			fmt.Println(err)51		}52		resp.Body.Close()53		time.Sleep(1 * time.Second)54	}55}56import (57func main() {58	c := &http.Client{

GotConn

Using AI Code Generation

1import (2func main() {3	if len(os.Args) < 2 {4		fmt.Println("Usage: 1.exe url")5		os.Exit(1)6	}7	url, err := url.Parse(os.Args[1])8	if err != nil {9		fmt.Println("Error parsing url")10		os.Exit(1)11	}12	jar, err := cookiejar.New(nil)13	if err != nil {14		fmt.Println("Error creating cookie jar")15		os.Exit(1)16	}17	client := &http.Client{18	}19	httpext := &httpext{20	}21	req, err := http.NewRequest("GET", url.String(), nil)22	if err != nil {23		fmt.Println("Error creating request")24		os.Exit(1)25	}26	resp, err := httpext.GotConn(req, nil)27	if err != nil {28		fmt.Println("Error creating response")29		os.Exit(1)30	}31	dump, err := httputil.DumpResponse(resp, true)32	if err != nil {33		fmt.Println("Error dumping response")34		os.Exit(1)35	}36	fmt.Println(string(dump))37}38type httpext struct {39}40func (h *httpext) GotConn(req *http.Request, conn *http.Conn) (*http.Response, error) {41	request, err := http.NewRequest(req.Method, req.URL.String(), req.Body)42	if err != nil {43		fmt.Println("Error creating request")44		os.Exit(1)45	}46	request.Header.Add("Cookie", strings.Join(req.Cookies(), ";"))47	resp, err := h.client.Do(request)48	if err != nil {49		fmt.Println("Error creating response")50		os.Exit(1)51	}52}53type ReadCloser interface {54}

GotConn

Using AI Code Generation

1import (2func main() {3	request := gorequest.New()4	request.Transport = &http.Transport{5		Dial: (&net.Dialer{6		}).Dial,7	}8	request.GotConn = func(conn net.Conn, got time.Time) {9		fmt.Println("Got connection after ", time.Since(got))10	}11	_, body, errs := request.End()12	if errs != nil {13		fmt.Println(errs)14	}15	fmt.Println(body)16}17import (18func main() {19	request := gorequest.New()20	request.Transport = &http.Transport{21		Dial: (&net.Dialer{22		}).Dial,23	}24	request.GotConn = func(conn net.Conn, got time.Time) {25		fmt.Println("Got connection after ", time.Since(got))26	}27	_, body, errs := request.End()28	if errs != nil {29		fmt.Println(errs)30	}31	fmt.Println(body)32}33import (34func main() {35	request := gorequest.New()36	request.Transport = &http.Transport{37		Dial: (&net.Dialer{38		}).Dial,39	}40	request.GotConn = func(conn net.Conn, got time.Time) {41		fmt.Println("Got connection after ", time.Since(got))42	}

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