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http.go
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http.go
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package trigger
import (
"bytes"
"context"
"fmt"
"io"
"net"
"net/http"
"strconv"
"strings"
"time"
"github.com/goware/urlx"
"github.com/kubeshop/tracetest/server/expression"
"github.com/kubeshop/tracetest/server/model"
"go.opentelemetry.io/otel/propagation"
"go.opentelemetry.io/otel/trace"
)
func HTTP() Triggerer {
return &httpTriggerer{}
}
type httpTriggerer struct{}
func httpClient() http.Client {
transport := &http.Transport{
DialContext: (&net.Dialer{
Timeout: time.Second,
}).DialContext,
}
return http.Client{
Transport: transport,
Timeout: 30 * time.Second,
}
}
func newSpanContext(ctx context.Context) trace.SpanContext {
spanCtx := trace.SpanContextFromContext(ctx)
var (
tid trace.TraceID
sid trace.SpanID
)
if spanCtx.IsValid() {
tid = spanCtx.TraceID()
sid = spanCtx.SpanID()
}
tracestate, _ := trace.ParseTraceState("tracetest=true")
var tf trace.TraceFlags
return trace.NewSpanContext(trace.SpanContextConfig{
TraceID: tid,
SpanID: sid,
TraceFlags: tf.WithSampled(true),
TraceState: tracestate,
Remote: true,
})
}
func (te *httpTriggerer) Trigger(ctx context.Context, test model.Test, opts *TriggerOptions) (Response, error) {
response := Response{
Result: model.TriggerResult{
Type: te.Type(),
},
}
trigger := test.ServiceUnderTest
if trigger.Type != model.TriggerTypeHTTP {
return response, fmt.Errorf(`trigger type "%s" not supported by HTTP triggerer`, trigger.Type)
}
client := httpClient()
ctx = trace.ContextWithSpanContext(ctx, newSpanContext(ctx))
ctx, cncl := context.WithTimeout(ctx, 30*time.Second)
defer cncl()
tReq := trigger.HTTP
var body io.Reader
if tReq.Body != "" {
body = bytes.NewBufferString(tReq.Body)
}
parsedUrl, err := urlx.Parse(tReq.URL)
if err != nil {
return response, err
}
req, err := http.NewRequestWithContext(ctx, strings.ToUpper(string(tReq.Method)), parsedUrl.String(), body)
if err != nil {
return response, err
}
for _, h := range tReq.Headers {
req.Header.Add(h.Key, h.Value)
}
tReq.Authenticate(req)
propagators().Inject(ctx, propagation.HeaderCarrier(req.Header))
resp, err := client.Do(req.WithContext(ctx))
if err != nil {
return response, err
}
mapped := mapResp(resp)
response.Result.HTTP = &mapped
response.SpanAttributes = map[string]string{
"tracetest.run.trigger.http.response_code": strconv.Itoa(resp.StatusCode),
}
return response, nil
}
func (t *httpTriggerer) Type() model.TriggerType {
return model.TriggerTypeHTTP
}
func (t *httpTriggerer) Resolve(ctx context.Context, test model.Test, opts *TriggerOptions) (model.Test, error) {
http := test.ServiceUnderTest.HTTP
if http == nil {
return test, fmt.Errorf("no settings provided for HTTP triggerer")
}
url, err := opts.Executor.ResolveStatement(WrapInQuotes(http.URL, "\""))
if err != nil {
return test, err
}
http.URL = url
headers := []model.HTTPHeader{}
for _, h := range http.Headers {
h.Key, err = opts.Executor.ResolveStatement(WrapInQuotes(h.Key, "\""))
if err != nil {
return test, err
}
h.Value, err = opts.Executor.ResolveStatement(WrapInQuotes(h.Value, "\""))
if err != nil {
return test, err
}
headers = append(headers, h)
}
http.Headers = headers
if http.Body != "" {
http.Body, err = opts.Executor.ResolveStatement(WrapInQuotes(http.Body, "'"))
if err != nil {
return test, err
}
}
http.Auth, err = resolveAuth(http.Auth, opts.Executor)
if err != nil {
return test, err
}
test.ServiceUnderTest.HTTP = http
return test, nil
}
func resolveAuth(auth *model.HTTPAuthenticator, executor expression.Executor) (*model.HTTPAuthenticator, error) {
if auth == nil {
return nil, nil
}
updated, err := auth.Map(func(v string) (string, error) {
resolved, err := executor.ResolveStatement(WrapInQuotes(v, "\""))
if err != nil {
return "", err
}
return resolved, nil
})
return &updated, err
}
func mapResp(resp *http.Response) model.HTTPResponse {
var mappedHeaders []model.HTTPHeader
for key, headers := range resp.Header {
for _, val := range headers {
val := model.HTTPHeader{
Key: key,
Value: val,
}
mappedHeaders = append(mappedHeaders, val)
}
}
var body string
if b, err := io.ReadAll(resp.Body); err == nil {
body = string(b)
} else {
fmt.Println(err)
}
return model.HTTPResponse{
Status: resp.Status,
StatusCode: resp.StatusCode,
Headers: mappedHeaders,
Body: body,
}
}