How to use RoundTrip method of httpext Package

Best K6 code snippet using httpext.RoundTrip

transport.go

Source:transport.go

...28	"github.com/luckybroman5/http-log-reconstructor/k6/lib"29	"github.com/luckybroman5/http-log-reconstructor/k6/lib/netext"30	"github.com/luckybroman5/http-log-reconstructor/k6/stats"31)32// transport is an implemenation of http.RoundTripper that will measure and emit33// different metrics for each roundtrip34type transport struct {35	state *lib.State36	tags  map[string]string37	lastRequest     *unfinishedRequest38	lastRequestLock *sync.Mutex39}40// unfinishedRequest stores the request and the raw result returned from the41// underlying http.RoundTripper, but before its body has been read42type unfinishedRequest struct {43	ctx      context.Context44	tracer   *Tracer45	request  *http.Request46	response *http.Response47	err      error48}49// finishedRequest is produced once the request has been finalized; it is50// triggered either by a subsequent RoundTrip, or for the last request in the51// chain - by the MakeRequest function manually calling the transport method52// processLastSavedRequest(), after reading the HTTP response body.53type finishedRequest struct {54	*unfinishedRequest55	trail     *Trail56	tlsInfo   netext.TLSInfo57	errorCode errCode58	errorMsg  string59}60var _ http.RoundTripper = &transport{}61// newTransport returns a new http.RoundTripper implementation that wraps around62// the provided state's Transport. It uses a httpext.Tracer to measure all HTTP63// requests made through it and annotates and emits the recorded metric samples64// through the state.Samples channel.65func newTransport(66	state *lib.State,67	tags map[string]string,68) *transport {69	return &transport{70		state:           state,71		tags:            tags,72		lastRequestLock: new(sync.Mutex),73	}74}75// Helper method to finish the tracer trail, assemble the tag values and emits76// the metric samples for the supplied unfinished request.77func (t *transport) measureAndEmitMetrics(unfReq *unfinishedRequest) *finishedRequest {78	trail := unfReq.tracer.Done()79	tags := map[string]string{}80	for k, v := range t.tags {81		tags[k] = v82	}83	result := &finishedRequest{84		unfinishedRequest: unfReq,85		trail:             trail,86	}87	enabledTags := t.state.Options.SystemTags88	if unfReq.err != nil {89		result.errorCode, result.errorMsg = errorCodeForError(unfReq.err)90		if enabledTags.Has(stats.TagError) {91			tags["error"] = result.errorMsg92		}93		if enabledTags.Has(stats.TagErrorCode) {94			tags["error_code"] = strconv.Itoa(int(result.errorCode))95		}96		if enabledTags.Has(stats.TagStatus) {97			tags["status"] = "0"98		}99	} else {100		if enabledTags.Has(stats.TagURL) {101			u := URL{u: unfReq.request.URL, URL: unfReq.request.URL.String()}102			tags["url"] = u.Clean()103		}104		if enabledTags.Has(stats.TagStatus) {105			tags["status"] = strconv.Itoa(unfReq.response.StatusCode)106		}107		if unfReq.response.StatusCode >= 400 {108			if enabledTags.Has(stats.TagErrorCode) {109				result.errorCode = errCode(1000 + unfReq.response.StatusCode)110				tags["error_code"] = strconv.Itoa(int(result.errorCode))111			}112		}113		if enabledTags.Has(stats.TagProto) {114			tags["proto"] = unfReq.response.Proto115		}116		if unfReq.response.TLS != nil {117			tlsInfo, oscp := netext.ParseTLSConnState(unfReq.response.TLS)118			if enabledTags.Has(stats.TagTLSVersion) {119				tags["tls_version"] = tlsInfo.Version120			}121			if enabledTags.Has(stats.TagOCSPStatus) {122				tags["ocsp_status"] = oscp.Status123			}124			result.tlsInfo = tlsInfo125		}126	}127	if enabledTags.Has(stats.TagIP) && trail.ConnRemoteAddr != nil {128		if ip, _, err := net.SplitHostPort(trail.ConnRemoteAddr.String()); err == nil {129			tags["ip"] = ip130		}131	}132	trail.SaveSamples(stats.IntoSampleTags(&tags))133	stats.PushIfNotCancelled(unfReq.ctx, t.state.Samples, trail)134	return result135}136func (t *transport) saveCurrentRequest(currentRequest *unfinishedRequest) {137	t.lastRequestLock.Lock()138	unprocessedRequest := t.lastRequest139	t.lastRequest = currentRequest140	t.lastRequestLock.Unlock()141	if unprocessedRequest != nil {142		// This shouldn't happen, since we have one transport per request, but just in case...143		t.state.Logger.Warnf("TracerTransport: unexpected unprocessed request for %s", unprocessedRequest.request.URL)144		t.measureAndEmitMetrics(unprocessedRequest)145	}146}147func (t *transport) processLastSavedRequest(lastErr error) *finishedRequest {148	t.lastRequestLock.Lock()149	unprocessedRequest := t.lastRequest150	t.lastRequest = nil151	t.lastRequestLock.Unlock()152	if unprocessedRequest != nil {153		// We don't want to overwrite any previous errors, but if there were154		// none and we (i.e. the MakeRequest() function) have one, save it155		// before we emit the metrics.156		if unprocessedRequest.err == nil && lastErr != nil {157			unprocessedRequest.err = lastErr158		}159		return t.measureAndEmitMetrics(unprocessedRequest)160	}161	return nil162}163// RoundTrip is the implementation of http.RoundTripper164func (t *transport) RoundTrip(req *http.Request) (*http.Response, error) {165	t.processLastSavedRequest(nil)166	ctx := req.Context()167	tracer := &Tracer{}168	reqWithTracer := req.WithContext(httptrace.WithClientTrace(ctx, tracer.Trace()))169	resp, err := t.state.Transport.RoundTrip(reqWithTracer)170	t.saveCurrentRequest(&unfinishedRequest{171		ctx:      ctx,172		tracer:   tracer,173		request:  req,174		response: resp,175		err:      err,176	})177	return resp, err178}...

lazy_rate_limiter.go

Source:lazy_rate_limiter.go

...16	"net/http"17	"time"18	"github.com/jadefox10200/backoff"19)20// A LazyRateLimiter implements rate limiting for an http.RoundTripper object.21// Rate limiting start when the server responds with 429 Too Many Requests.22type LazyRateLimiter struct {23	transport     http.RoundTripper24	backoffPolicy backoff.Policy25}26// NewLazyRateLimiter returns a new LazyRateLimiter given a transport and27// backoff policy. The transport will use http.DefaultTransport when nil. The28// backoff policy will use backoff.Default when nil.29func NewLazyRateLimiter(transport http.RoundTripper, backoffPolicy backoff.Policy) LazyRateLimiter {30	// Use http.DefaultTransport when nil.31	if transport == nil {32		transport = http.DefaultTransport33	}34	// Use backoff.Default when nil.35	if backoffPolicy == nil {36		backoffPolicy = backoff.Default()37	}38	return LazyRateLimiter{transport, backoffPolicy}39}40// RoundTrip implemented the http.RoundTripper interface.41func (lrl LazyRateLimiter) RoundTrip(req *http.Request) (*http.Response, error) {42	resp, err := lrl.transport.RoundTrip(req)43	// Decrease the backoff policy delay if the server does not respond with 42944	// Too Many Requests.45	if resp.StatusCode != http.StatusTooManyRequests {46		lrl.backoffPolicy.Decrease()47	} else {48		// Repeat until the server does not respond with 429 Too Many Requests.49		for resp.StatusCode == http.StatusTooManyRequests {50			if err := resp.Body.Close(); err != nil {51				return nil, err52			}53			// Rate limit based on the Retry-After header or otherwise use the54			// backoff policy.55			d, err := ParseRetryAfter(resp.Header.Get("Retry-After"))56			if err != nil {57				d = lrl.backoffPolicy.Increase()58			}59			time.Sleep(d)60			resp, err = lrl.transport.RoundTrip(req)61			if err != nil {62				return nil, err63			}64		}65	}66	return resp, err67}...

round_tripper_func.go

Source:round_tripper_func.go

...12// See the License for the specific language governing permissions and13// limitations under the License.14package httpext15import "net/http"16// A RoundTripperFunc is a function used as the RoundTrip method for the17// http.RoundTripper interface.18type RoundTripperFunc func(req *http.Request) (*http.Response, error)19// RoundTrip implements the http.RoundTripper interface.20func (f RoundTripperFunc) RoundTrip(req *http.Request) (*http.Response, error) {21	return f(req)22}23// WithTransportFunc returns a copy of a client that uses a given24// RoundTripperFunc as the transport. The client will default to25// http.DefaultClient when nil.26func WithTransportFunc(c *http.Client, f RoundTripperFunc) *http.Client {27	if c == nil {28		c = http.DefaultClient29	}30	clientWithTransport := *c31	clientWithTransport.Transport = f32	return &clientWithTransport33}...

RoundTrip

Using AI Code Generation

1import (2func main() {3	if err != nil {4		fmt.Println("Error: ", err)5	}6	client := http.Client{}7	resp, err := client.Do(req)8	if err != nil {9		fmt.Println("Error: ", err)10	}11	defer resp.Body.Close()12	fmt.Println("Response status: ", resp.Status)13	dump, err := httputil.DumpResponse(resp, true)14	if err != nil {15		fmt.Println("Error: ", err)16	}17	fmt.Println(string(dump))18}19Content-Type: text/html; charset=ISO-8859-120Set-Cookie: 1P_JAR=2020-02-24-14; expires=Wed, 25-Mar-2020 14:46:57 GMT; path=/; domain=.google.com

RoundTrip

Using AI Code Generation

1import (2func main() {3	if err != nil {4		fmt.Println(err)5	}6	rec := httptest.NewRecorder()7	handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {8		fmt.Fprintf(w, "Hello World")9	})10	httpext := httputil.NewServerConn(rec, nil)

RoundTrip

Using AI Code Generation

1func main() {2    if err != nil {3        log.Fatal(err)4    }5    client := &http.Client{}6    resp, err := client.Do(req)7    if err != nil {8        log.Fatal(err)9    }10    defer resp.Body.Close()11    body, err := ioutil.ReadAll(resp.Body)12    if err != nil {13        log.Fatal(err)14    }15    fmt.Println(string(body))16}

RoundTrip

Using AI Code Generation

1import (2func main() {3    req, _ := http.NewRequest("GET", u.String(), nil)4    rt := &http.Transport{}5    h := &httpext{rt}6    client := &http.Client{Transport: h}7    resp, err := client.Do(req)8    if err != nil {9        fmt.Println(err)10    }11    b, _ := httputil.DumpResponse(resp, true)12    fmt.Println(string(b))13}14import (15func main() {16    req, _ := http.NewRequest("GET", u.String(), nil)17    rt := &http.Transport{}18    h := &httpext{rt}19    client := &http.Client{Transport: h}20    resp, err := client.Do(req)21    if err != nil {22        fmt.Println(err)23    }24    b, _ := httputil.DumpResponse(resp, true)25    fmt.Println(string(b))26}27import (28func main() {29    req, _ := http.NewRequest("GET", u.String(), nil

RoundTrip

Using AI Code Generation

1import (2func main() {3	client := &http.Client{}4	resp, _ := client.Do(req)5	fmt.Println(resp)6	dump, _ := httputil.DumpResponse(resp, true)7	fmt.Println(string(dump))8}9Content-Type: text/html; charset=ISO-8859-110X-XSS-Protection: 1; mode=block11Set-Cookie: 1P_JAR=2018-04-15-08; expires=Mon, 15-May-2018 08:30:22 GMT; path=/; domain=.google.com12Set-Cookie: NID=130=J1p6mBd6F0w6q3CZt1kZt9i9b8Wl2QcQbRfR5d5j5l5w7VZfzrZB7g2o8hWf7VZBn0u6Jxg0K8Ww0Z3q3p1z9v9m5B0z5y2Q5y5m5m5d5f5w; expires=Tue, 14-Oct-2018 08:30:22 GMT; path=/; domain=.google.com; HttpOnly

RoundTrip

Using AI Code Generation

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

RoundTrip

Using AI Code Generation

1import (2func main() {3	if err != nil {4		panic(err)5	}6	client := http.Client{}7	resp, err := client.Do(req)8	if err != nil {9		panic(err)10	}11	body, err := ioutil.ReadAll(resp.Body)12	if err != nil {13		panic(err)14	}15	fmt.Println(string(body))16}17{"url":"/get","headers":{"Accept-Encoding":["gzip"],"Connection":["close"],"User-Agent":["Go-http-client/1.1"]}}18import (19func main() {20	if err != nil {21		panic(err)22	}23	resp, err := http.DefaultClient.Do(req)24	if err != nil {25		panic(err)26	}27	body, err := ioutil.ReadAll(resp.Body)28	if err != nil {29		panic(err)30	}31	fmt.Println(string(body))32}33{"url":"/get","headers":{"Accept-Encoding":["gzip"],"Connection":["close"],"User-Agent":["Go-http-client/1.1"]}}34Example 3: How to use http.Get()?35import (36func main() {37	if err != nil {38		panic(err)39	}40	body, err := ioutil.ReadAll(resp.Body)41	if err != nil {42		panic(err)43	}44	fmt.Println(string(body))45}

RoundTrip

Using AI Code Generation

1import (2func main() {3    client := &http.Client {4    }5    req, err := http.NewRequest(method, url, nil)6    if err != nil {7        fmt.Println(err)8    }9    res, err := client.Do(req)10    defer res.Body.Close()11    body, err := ioutil.ReadAll(res.Body)12    fmt.Println(string(body))13}

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.