83 lines
2.2 KiB
Go
83 lines
2.2 KiB
Go
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package oldhttptransport
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import (
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"io"
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"net/http"
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"time"
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"github.com/ooni/probe-cli/v3/internal/engine/legacy/netx/modelx"
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"github.com/ooni/probe-cli/v3/internal/engine/legacy/netx/transactionid"
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)
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// BodyTracer performs single HTTP transactions and emits
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// measurement events as they happen.
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type BodyTracer struct {
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Transport http.RoundTripper
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}
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// NewBodyTracer creates a new Transport.
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func NewBodyTracer(roundTripper http.RoundTripper) *BodyTracer {
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return &BodyTracer{Transport: roundTripper}
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}
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// RoundTrip executes a single HTTP transaction, returning
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// a Response for the provided Request.
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func (t *BodyTracer) RoundTrip(req *http.Request) (resp *http.Response, err error) {
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resp, err = t.Transport.RoundTrip(req)
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if err != nil {
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return
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}
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// "The http Client and Transport guarantee that Body is always
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// non-nil, even on responses without a body or responses with
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// a zero-length body." (from the docs)
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resp.Body = &bodyWrapper{
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ReadCloser: resp.Body,
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root: modelx.ContextMeasurementRootOrDefault(req.Context()),
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tid: transactionid.ContextTransactionID(req.Context()),
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}
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return
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}
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// CloseIdleConnections closes the idle connections.
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func (t *BodyTracer) CloseIdleConnections() {
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// Adapted from net/http code
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type closeIdler interface {
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CloseIdleConnections()
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}
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if tr, ok := t.Transport.(closeIdler); ok {
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tr.CloseIdleConnections()
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}
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}
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type bodyWrapper struct {
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io.ReadCloser
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root *modelx.MeasurementRoot
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tid int64
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}
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func (bw *bodyWrapper) Read(b []byte) (n int, err error) {
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n, err = bw.ReadCloser.Read(b)
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bw.root.Handler.OnMeasurement(modelx.Measurement{
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HTTPResponseBodyPart: &modelx.HTTPResponseBodyPartEvent{
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// "Read reads up to len(p) bytes into p. It returns the number of
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// bytes read (0 <= n <= len(p)) and any error encountered."
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Data: b[:n],
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Error: err,
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DurationSinceBeginning: time.Now().Sub(bw.root.Beginning),
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TransactionID: bw.tid,
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},
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})
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return
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}
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func (bw *bodyWrapper) Close() (err error) {
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err = bw.ReadCloser.Close()
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bw.root.Handler.OnMeasurement(modelx.Measurement{
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HTTPResponseDone: &modelx.HTTPResponseDoneEvent{
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DurationSinceBeginning: time.Now().Sub(bw.root.Beginning),
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TransactionID: bw.tid,
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},
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})
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return
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}
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