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vendor: update buildkit

Browse Source 
Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>
This commit is contained in:
CrazyMax
2021-09-21 07:49:39 +02:00
parent 06541ebd0f
commit 45e4550c36
1040 changed files with 100774 additions and 7915 deletions
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43
vendor/go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc/interceptor.go generated vendored
View File

@ -122,8 +122,7 @@ type streamEvent struct {
}
const (
closeEvent streamEventType = iota
receiveEndEvent
receiveEndEvent streamEventType = iota
errorEvent
)
@ -188,19 +187,12 @@ func (w *clientStream) CloseSend() error {
if err != nil {
w.sendStreamEvent(errorEvent, err)
} else {
w.sendStreamEvent(closeEvent, nil)
}
return err
}
const (
clientClosedState byte = 1 << iota
receiveEndedState
)
func wrapClientStream(s grpc.ClientStream, desc *grpc.StreamDesc) *clientStream {
func wrapClientStream(ctx context.Context, s grpc.ClientStream, desc *grpc.StreamDesc) *clientStream {
events := make(chan streamEvent)
eventsDone := make(chan struct{})
finished := make(chan error)
@ -208,23 +200,20 @@ func wrapClientStream(s grpc.ClientStream, desc *grpc.StreamDesc) *clientStream
go func() {
defer close(eventsDone)
// Both streams have to be closed
state := byte(0)
for event := range events {
switch event.Type {
case closeEvent:
state |= clientClosedState
case receiveEndEvent:
state |= receiveEndedState
case errorEvent:
finished <- event.Err
return
}
if state == clientClosedState|receiveEndedState {
finished <- nil
for {
select {
case <-ctx.Done():
finished <- ctx.Err()
return
case event := <-events:
switch event.Type {
case receiveEndEvent:
finished <- nil
return
case errorEvent:
finished <- event.Err
return
}
}
}
}()
@ -284,7 +273,7 @@ func StreamClientInterceptor(opts ...Option) grpc.StreamClientInterceptor {
span.End()
return s, err
}
stream := wrapClientStream(s, desc)
stream := wrapClientStream(ctx, s, desc)
go func() {
err := <-stream.finished

201
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/httptrace/otelhttptrace/LICENSE generated vendored Normal file
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@ -0,0 +1,201 @@
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
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including but not limited to software source code, documentation
source, and configuration files.
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"Work" shall mean the work of authorship, whether in Source or
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APPENDIX: How to apply the Apache License to your work.
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Unless required by applicable law or agreed to in writing, software
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
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28
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/httptrace/otelhttptrace/api.go generated vendored Normal file
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@ -0,0 +1,28 @@
// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package otelhttptrace
import (
"context"
"net/http"
"net/http/httptrace"
)
// W3C client.
func W3C(ctx context.Context, req *http.Request) (context.Context, *http.Request) {
ctx = httptrace.WithClientTrace(ctx, NewClientTrace(ctx))
req = req.WithContext(ctx)
return ctx, req
}

370
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/httptrace/otelhttptrace/clienttrace.go generated vendored Normal file
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@ -0,0 +1,370 @@
// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package otelhttptrace
import (
"context"
"crypto/tls"
"net/http/httptrace"
"net/textproto"
"strings"
"sync"
"go.opentelemetry.io/contrib"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/codes"
semconv "go.opentelemetry.io/otel/semconv/v1.4.0"
"go.opentelemetry.io/otel/trace"
)
// HTTP attributes.
var (
HTTPStatus = attribute.Key("http.status")
HTTPHeaderMIME = attribute.Key("http.mime")
HTTPRemoteAddr = attribute.Key("http.remote")
HTTPLocalAddr = attribute.Key("http.local")
HTTPConnectionReused = attribute.Key("http.conn.reused")
HTTPConnectionWasIdle = attribute.Key("http.conn.wasidle")
HTTPConnectionIdleTime = attribute.Key("http.conn.idletime")
HTTPConnectionStartNetwork = attribute.Key("http.conn.start.network")
HTTPConnectionDoneNetwork = attribute.Key("http.conn.done.network")
HTTPConnectionDoneAddr = attribute.Key("http.conn.done.addr")
HTTPDNSAddrs = attribute.Key("http.dns.addrs")
)
var (
hookMap = map[string]string{
"http.dns": "http.getconn",
"http.connect": "http.getconn",
"http.tls": "http.getconn",
}
)
func parentHook(hook string) string {
if strings.HasPrefix(hook, "http.connect") {
return hookMap["http.connect"]
}
return hookMap[hook]
}
// ClientTraceOption allows customizations to how the httptrace.Client
// collects information.
type ClientTraceOption func(*clientTracer)
// WithoutSubSpans will modify the httptrace.Client to only collect data
// as Events and Attributes on a span found in the context. By default
// sub-spans will be generated.
func WithoutSubSpans() ClientTraceOption {
return func(ct *clientTracer) {
ct.useSpans = false
}
}
// WithRedactedHeaders will be replaced by fixed '****' values for the header
// names provided. These are in addition to the sensitive headers already
// redacted by default: Authorization, WWW-Authenticate, Proxy-Authenticate
// Proxy-Authorization, Cookie, Set-Cookie
func WithRedactedHeaders(headers ...string) ClientTraceOption {
return func(ct *clientTracer) {
for _, header := range headers {
ct.redactedHeaders[strings.ToLower(header)] = struct{}{}
}
}
}
// WithoutHeaders will disable adding span annotations for the http headers
// and values.
func WithoutHeaders() ClientTraceOption {
return func(ct *clientTracer) {
ct.addHeaders = false
}
}
type clientTracer struct {
context.Context
tr trace.Tracer
activeHooks map[string]context.Context
root trace.Span
mtx sync.Mutex
redactedHeaders map[string]struct{}
addHeaders bool
useSpans bool
}
func NewClientTrace(ctx context.Context, opts ...ClientTraceOption) *httptrace.ClientTrace {
ct := &clientTracer{
Context: ctx,
activeHooks: make(map[string]context.Context),
redactedHeaders: map[string]struct{}{
"authorization": {},
"www-authenticate": {},
"proxy-authenticate": {},
"proxy-authorization": {},
"cookie": {},
"set-cookie": {},
},
addHeaders: true,
useSpans: true,
}
for _, opt := range opts {
opt(ct)
}
var tp trace.TracerProvider
if span := trace.SpanFromContext(ctx); span.SpanContext().IsValid() {
tp = span.TracerProvider()
} else {
tp = otel.GetTracerProvider()
}
ct.tr = tp.Tracer(
"go.opentelemetry.io/otel/instrumentation/httptrace",
trace.WithInstrumentationVersion(contrib.SemVersion()),
)
return &httptrace.ClientTrace{
GetConn: ct.getConn,
GotConn: ct.gotConn,
PutIdleConn: ct.putIdleConn,
GotFirstResponseByte: ct.gotFirstResponseByte,
Got100Continue: ct.got100Continue,
Got1xxResponse: ct.got1xxResponse,
DNSStart: ct.dnsStart,
DNSDone: ct.dnsDone,
ConnectStart: ct.connectStart,
ConnectDone: ct.connectDone,
TLSHandshakeStart: ct.tlsHandshakeStart,
TLSHandshakeDone: ct.tlsHandshakeDone,
WroteHeaderField: ct.wroteHeaderField,
WroteHeaders: ct.wroteHeaders,
Wait100Continue: ct.wait100Continue,
WroteRequest: ct.wroteRequest,
}
}
func (ct *clientTracer) start(hook, spanName string, attrs ...attribute.KeyValue) {
if !ct.useSpans {
if ct.root == nil {
ct.root = trace.SpanFromContext(ct.Context)
}
ct.root.AddEvent(hook+".start", trace.WithAttributes(attrs...))
return
}
ct.mtx.Lock()
defer ct.mtx.Unlock()
if hookCtx, found := ct.activeHooks[hook]; !found {
var sp trace.Span
ct.activeHooks[hook], sp = ct.tr.Start(ct.getParentContext(hook), spanName, trace.WithAttributes(attrs...), trace.WithSpanKind(trace.SpanKindClient))
if ct.root == nil {
ct.root = sp
}
} else {
// end was called before start finished, add the start attributes and end the span here
span := trace.SpanFromContext(hookCtx)
span.SetAttributes(attrs...)
span.End()
delete(ct.activeHooks, hook)
}
}
func (ct *clientTracer) end(hook string, err error, attrs ...attribute.KeyValue) {
if !ct.useSpans {
if err != nil {
attrs = append(attrs, attribute.String(hook+".error", err.Error()))
}
ct.root.AddEvent(hook+".done", trace.WithAttributes(attrs...))
return
}
ct.mtx.Lock()
defer ct.mtx.Unlock()
if ctx, ok := ct.activeHooks[hook]; ok {
span := trace.SpanFromContext(ctx)
if err != nil {
span.SetStatus(codes.Error, err.Error())
}
span.SetAttributes(attrs...)
span.End()
delete(ct.activeHooks, hook)
} else {
// start is not finished before end is called.
// Start a span here with the ending attributes that will be finished when start finishes.
// Yes, it's backwards. v0v
ctx, span := ct.tr.Start(ct.getParentContext(hook), hook, trace.WithAttributes(attrs...), trace.WithSpanKind(trace.SpanKindClient))
if err != nil {
span.SetStatus(codes.Error, err.Error())
}
ct.activeHooks[hook] = ctx
}
}
func (ct *clientTracer) getParentContext(hook string) context.Context {
ctx, ok := ct.activeHooks[parentHook(hook)]
if !ok {
return ct.Context
}
return ctx
}
func (ct *clientTracer) span(hook string) trace.Span {
ct.mtx.Lock()
defer ct.mtx.Unlock()
if ctx, ok := ct.activeHooks[hook]; ok {
return trace.SpanFromContext(ctx)
}
return nil
}
func (ct *clientTracer) getConn(host string) {
ct.start("http.getconn", "http.getconn", semconv.HTTPHostKey.String(host))
}
func (ct *clientTracer) gotConn(info httptrace.GotConnInfo) {
attrs := []attribute.KeyValue{
HTTPRemoteAddr.String(info.Conn.RemoteAddr().String()),
HTTPLocalAddr.String(info.Conn.LocalAddr().String()),
HTTPConnectionReused.Bool(info.Reused),
HTTPConnectionWasIdle.Bool(info.WasIdle),
}
if info.WasIdle {
attrs = append(attrs, HTTPConnectionIdleTime.String(info.IdleTime.String()))
}
ct.end("http.getconn", nil, attrs...)
}
func (ct *clientTracer) putIdleConn(err error) {
ct.end("http.receive", err)
}
func (ct *clientTracer) gotFirstResponseByte() {
ct.start("http.receive", "http.receive")
}
func (ct *clientTracer) dnsStart(info httptrace.DNSStartInfo) {
ct.start("http.dns", "http.dns", semconv.HTTPHostKey.String(info.Host))
}
func (ct *clientTracer) dnsDone(info httptrace.DNSDoneInfo) {
var addrs []string
for _, netAddr := range info.Addrs {
addrs = append(addrs, netAddr.String())
}
ct.end("http.dns", info.Err, HTTPDNSAddrs.String(sliceToString(addrs)))
}
func (ct *clientTracer) connectStart(network, addr string) {
ct.start("http.connect."+addr, "http.connect",
HTTPRemoteAddr.String(addr),
HTTPConnectionStartNetwork.String(network),
)
}
func (ct *clientTracer) connectDone(network, addr string, err error) {
ct.end("http.connect."+addr, err,
HTTPConnectionDoneAddr.String(addr),
HTTPConnectionDoneNetwork.String(network),
)
}
func (ct *clientTracer) tlsHandshakeStart() {
ct.start("http.tls", "http.tls")
}
func (ct *clientTracer) tlsHandshakeDone(_ tls.ConnectionState, err error) {
ct.end("http.tls", err)
}
func (ct *clientTracer) wroteHeaderField(k string, v []string) {
if ct.useSpans && ct.span("http.headers") == nil {
ct.start("http.headers", "http.headers")
}
if !ct.addHeaders {
return
}
k = strings.ToLower(k)
value := sliceToString(v)
if _, ok := ct.redactedHeaders[k]; ok {
value = "****"
}
ct.root.SetAttributes(attribute.String("http."+k, value))
}
func (ct *clientTracer) wroteHeaders() {
if ct.useSpans && ct.span("http.headers") != nil {
ct.end("http.headers", nil)
}
ct.start("http.send", "http.send")
}
func (ct *clientTracer) wroteRequest(info httptrace.WroteRequestInfo) {
if info.Err != nil {
ct.root.SetStatus(codes.Error, info.Err.Error())
}
ct.end("http.send", info.Err)
}
func (ct *clientTracer) got100Continue() {
span := ct.root
if ct.useSpans {
span = ct.span("http.receive")
}
span.AddEvent("GOT 100 - Continue")
}
func (ct *clientTracer) wait100Continue() {
span := ct.root
if ct.useSpans {
span = ct.span("http.receive")
}
span.AddEvent("GOT 100 - Wait")
}
func (ct *clientTracer) got1xxResponse(code int, header textproto.MIMEHeader) error {
span := ct.root
if ct.useSpans {
span = ct.span("http.receive")
}
span.AddEvent("GOT 1xx", trace.WithAttributes(
HTTPStatus.Int(code),
HTTPHeaderMIME.String(sm2s(header)),
))
return nil
}
func sliceToString(value []string) string {
if len(value) == 0 {
return "undefined"
}
return strings.Join(value, ",")
}
func sm2s(value map[string][]string) string {
var buf strings.Builder
for k, v := range value {
if buf.Len() != 0 {
buf.WriteString(",")
}
buf.WriteString(k)
buf.WriteString("=")
buf.WriteString(sliceToString(v))
}
return buf.String()
}

14
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/httptrace/otelhttptrace/go.mod generated vendored Normal file
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@ -0,0 +1,14 @@
module go.opentelemetry.io/contrib/instrumentation/net/http/httptrace/otelhttptrace
go 1.15
replace go.opentelemetry.io/contrib => ../../../../..
require (
github.com/google/go-cmp v0.5.6
github.com/stretchr/testify v1.7.0
go.opentelemetry.io/contrib v0.21.0
go.opentelemetry.io/otel v1.0.0-RC1
go.opentelemetry.io/otel/oteltest v1.0.0-RC1
go.opentelemetry.io/otel/trace v1.0.0-RC1
)

21
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/httptrace/otelhttptrace/go.sum generated vendored Normal file
View File

@ -0,0 +1,21 @@
github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/google/go-cmp v0.5.6 h1:BKbKCqvP6I+rmFHt06ZmyQtvB8xAkWdhFyr0ZUNZcxQ=
github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
go.opentelemetry.io/otel v1.0.0-RC1 h1:4CeoX93DNTWt8awGK9JmNXzF9j7TyOu9upscEdtcdXc=
go.opentelemetry.io/otel v1.0.0-RC1/go.mod h1:x9tRa9HK4hSSq7jf2TKbqFbtt58/TGk0f9XiEYISI1I=
go.opentelemetry.io/otel/oteltest v1.0.0-RC1 h1:G685iP3XiskCwk/z0eIabL55XUl2gk0cljhGk9sB0Yk=
go.opentelemetry.io/otel/oteltest v1.0.0-RC1/go.mod h1:+eoIG0gdEOaPNftuy1YScLr1Gb4mL/9lpDkZ0JjMRq4=
go.opentelemetry.io/otel/trace v1.0.0-RC1 h1:jrjqKJZEibFrDz+umEASeU3LvdVyWKlnTh7XEfwrT58=
go.opentelemetry.io/otel/trace v1.0.0-RC1/go.mod h1:86UHmyHWFEtWjfWPSbu0+d0Pf9Q6e1U+3ViBOc+NXAg=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

68
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/httptrace/otelhttptrace/httptrace.go generated vendored Normal file
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package otelhttptrace
import (
"context"
"net/http"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/baggage"
"go.opentelemetry.io/otel/propagation"
semconv "go.opentelemetry.io/otel/semconv/v1.4.0"
"go.opentelemetry.io/otel/trace"
)
// Option is a function that allows configuration of the httptrace Extract()
// and Inject() functions
type Option func(*config)
type config struct {
propagators propagation.TextMapPropagator
}
func newConfig(opts []Option) *config {
c := &config{propagators: otel.GetTextMapPropagator()}
for _, o := range opts {
o(c)
}
return c
}
// WithPropagators sets the propagators to use for Extraction and Injection
func WithPropagators(props propagation.TextMapPropagator) Option {
return func(c *config) {
c.propagators = props
}
}
// Extract returns the Attributes, Context Entries, and SpanContext that were encoded by Inject.
func Extract(ctx context.Context, req *http.Request, opts ...Option) ([]attribute.KeyValue, baggage.Baggage, trace.SpanContext) {
c := newConfig(opts)
ctx = c.propagators.Extract(ctx, propagation.HeaderCarrier(req.Header))
attrs := append(
semconv.HTTPServerAttributesFromHTTPRequest("", "", req),
semconv.NetAttributesFromHTTPRequest("tcp", req)...,
)
return attrs, baggage.FromContext(ctx), trace.SpanContextFromContext(ctx)
}
func Inject(ctx context.Context, req *http.Request, opts ...Option) {
c := newConfig(opts)
c.propagators.Inject(ctx, propagation.HeaderCarrier(req.Header))
}

201
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/LICENSE generated vendored Normal file
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Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
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of your accepting any such warranty or additional liability.
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APPENDIX: How to apply the Apache License to your work.
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boilerplate notice, with the fields enclosed by brackets "[]"
replaced with your own identifying information. (Don't include
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Copyright [yyyy] [name of copyright owner]
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
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Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

61
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/client.go generated vendored Normal file
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package otelhttp
import (
"context"
"io"
"net/http"
"net/url"
"strings"
)
// DefaultClient is the default Client and is used by Get, Head, Post and PostForm.
// Please be careful of intitialization order - for example, if you change
// the global propagator, the DefaultClient might still be using the old one
var DefaultClient = &http.Client{Transport: NewTransport(http.DefaultTransport)}
// Get is a convenient replacement for http.Get that adds a span around the request.
func Get(ctx context.Context, url string) (resp *http.Response, err error) {
req, err := http.NewRequestWithContext(ctx, "GET", url, nil)
if err != nil {
return nil, err
}
return DefaultClient.Do(req)
}
// Head is a convenient replacement for http.Head that adds a span around the request.
func Head(ctx context.Context, url string) (resp *http.Response, err error) {
req, err := http.NewRequestWithContext(ctx, "HEAD", url, nil)
if err != nil {
return nil, err
}
return DefaultClient.Do(req)
}
// Post is a convenient replacement for http.Post that adds a span around the request.
func Post(ctx context.Context, url, contentType string, body io.Reader) (resp *http.Response, err error) {
req, err := http.NewRequestWithContext(ctx, "POST", url, body)
if err != nil {
return nil, err
}
req.Header.Set("Content-Type", contentType)
return DefaultClient.Do(req)
}
// PostForm is a convenient replacement for http.PostForm that adds a span around the request.
func PostForm(ctx context.Context, url string, data url.Values) (resp *http.Response, err error) {
return Post(ctx, url, "application/x-www-form-urlencoded", strings.NewReader(data.Encode()))
}

47
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/common.go generated vendored Normal file
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package otelhttp
import (
"net/http"
"go.opentelemetry.io/contrib"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/trace"
)
// Attribute keys that can be added to a span.
const (
ReadBytesKey = attribute.Key("http.read_bytes") // if anything was read from the request body, the total number of bytes read
ReadErrorKey = attribute.Key("http.read_error") // If an error occurred while reading a request, the string of the error (io.EOF is not recorded)
WroteBytesKey = attribute.Key("http.wrote_bytes") // if anything was written to the response writer, the total number of bytes written
WriteErrorKey = attribute.Key("http.write_error") // if an error occurred while writing a reply, the string of the error (io.EOF is not recorded)
)
// Server HTTP metrics
const (
RequestCount = "http.server.request_count" // Incoming request count total
RequestContentLength = "http.server.request_content_length" // Incoming request bytes total
ResponseContentLength = "http.server.response_content_length" // Incoming response bytes total
ServerLatency = "http.server.duration" // Incoming end to end duration, microseconds
)
// Filter is a predicate used to determine whether a given http.request should
// be traced. A Filter must return true if the request should be traced.
type Filter func(*http.Request) bool
func newTracer(tp trace.TracerProvider) trace.Tracer {
return tp.Tracer(instrumentationName, trace.WithInstrumentationVersion(contrib.SemVersion()))
}

181
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/config.go generated vendored Normal file
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package otelhttp
import (
"context"
"net/http"
"net/http/httptrace"
"go.opentelemetry.io/contrib"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/metric"
"go.opentelemetry.io/otel/metric/global"
"go.opentelemetry.io/otel/propagation"
"go.opentelemetry.io/otel/trace"
)
const (
instrumentationName = "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
)
// config represents the configuration options available for the http.Handler
// and http.Transport types.
type config struct {
Tracer trace.Tracer
Meter metric.Meter
Propagators propagation.TextMapPropagator
SpanStartOptions []trace.SpanStartOption
ReadEvent bool
WriteEvent bool
Filters []Filter
SpanNameFormatter func(string, *http.Request) string
ClientTrace func(context.Context) *httptrace.ClientTrace
TracerProvider trace.TracerProvider
MeterProvider metric.MeterProvider
}
// Option interface used for setting optional config properties.
type Option interface {
apply(*config)
}
type optionFunc func(*config)
func (o optionFunc) apply(c *config) {
o(c)
}
// newConfig creates a new config struct and applies opts to it.
func newConfig(opts ...Option) *config {
c := &config{
Propagators: otel.GetTextMapPropagator(),
MeterProvider: global.GetMeterProvider(),
}
for _, opt := range opts {
opt.apply(c)
}
// Tracer is only initialized if manually specified. Otherwise, can be passed with the tracing context.
if c.TracerProvider != nil {
c.Tracer = newTracer(c.TracerProvider)
}
c.Meter = c.MeterProvider.Meter(
instrumentationName,
metric.WithInstrumentationVersion(contrib.SemVersion()),
)
return c
}
// WithTracerProvider specifies a tracer provider to use for creating a tracer.
// If none is specified, the global provider is used.
func WithTracerProvider(provider trace.TracerProvider) Option {
return optionFunc(func(cfg *config) {
cfg.TracerProvider = provider
})
}
// WithMeterProvider specifies a meter provider to use for creating a meter.
// If none is specified, the global provider is used.
func WithMeterProvider(provider metric.MeterProvider) Option {
return optionFunc(func(cfg *config) {
cfg.MeterProvider = provider
})
}
// WithPublicEndpoint configures the Handler to link the span with an incoming
// span context. If this option is not provided, then the association is a child
// association instead of a link.
func WithPublicEndpoint() Option {
return optionFunc(func(c *config) {
c.SpanStartOptions = append(c.SpanStartOptions, trace.WithNewRoot())
})
}
// WithPropagators configures specific propagators. If this
// option isn't specified then
func WithPropagators(ps propagation.TextMapPropagator) Option {
return optionFunc(func(c *config) {
c.Propagators = ps
})
}
// WithSpanOptions configures an additional set of
// trace.SpanOptions, which are applied to each new span.
func WithSpanOptions(opts ...trace.SpanStartOption) Option {
return optionFunc(func(c *config) {
c.SpanStartOptions = append(c.SpanStartOptions, opts...)
})
}
// WithFilter adds a filter to the list of filters used by the handler.
// If any filter indicates to exclude a request then the request will not be
// traced. All filters must allow a request to be traced for a Span to be created.
// If no filters are provided then all requests are traced.
// Filters will be invoked for each processed request, it is advised to make them
// simple and fast.
func WithFilter(f Filter) Option {
return optionFunc(func(c *config) {
c.Filters = append(c.Filters, f)
})
}
type event int
// Different types of events that can be recorded, see WithMessageEvents
const (
ReadEvents event = iota
WriteEvents
)
// WithMessageEvents configures the Handler to record the specified events
// (span.AddEvent) on spans. By default only summary attributes are added at the
// end of the request.
//
// Valid events are:
// * ReadEvents: Record the number of bytes read after every http.Request.Body.Read
// using the ReadBytesKey
// * WriteEvents: Record the number of bytes written after every http.ResponeWriter.Write
// using the WriteBytesKey
func WithMessageEvents(events ...event) Option {
return optionFunc(func(c *config) {
for _, e := range events {
switch e {
case ReadEvents:
c.ReadEvent = true
case WriteEvents:
c.WriteEvent = true
}
}
})
}
// WithSpanNameFormatter takes a function that will be called on every
// request and the returned string will become the Span Name
func WithSpanNameFormatter(f func(operation string, r *http.Request) string) Option {
return optionFunc(func(c *config) {
c.SpanNameFormatter = f
})
}
// WithClientTrace takes a function that returns client trace instance that will be
// applied to the requests sent through the otelhttp Transport.
func WithClientTrace(f func(context.Context) *httptrace.ClientTrace) Option {
return optionFunc(func(c *config) {
c.ClientTrace = f
})
}

18
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/doc.go generated vendored Normal file
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package otelhttp provides an http.Handler and functions that are intended
// to be used to add tracing by wrapping existing handlers (with Handler) and
// routes WithRouteTag.
package otelhttp // import "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"

15
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/go.mod generated vendored Normal file
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module go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp
go 1.15
replace go.opentelemetry.io/contrib => ../../../..
require (
github.com/felixge/httpsnoop v1.0.2
github.com/stretchr/testify v1.7.0
go.opentelemetry.io/contrib v0.21.0
go.opentelemetry.io/otel v1.0.0-RC1
go.opentelemetry.io/otel/metric v0.21.0
go.opentelemetry.io/otel/oteltest v1.0.0-RC1
go.opentelemetry.io/otel/trace v1.0.0-RC1
)

27
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/go.sum generated vendored Normal file
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@ -0,0 +1,27 @@
github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/felixge/httpsnoop v1.0.2 h1:+nS9g82KMXccJ/wp0zyRW9ZBHFETmMGtkk+2CTTrW4o=
github.com/felixge/httpsnoop v1.0.2/go.mod h1:m8KPJKqk1gH5J9DgRY2ASl2lWCfGKXixSwevea8zH2U=
github.com/google/go-cmp v0.5.6 h1:BKbKCqvP6I+rmFHt06ZmyQtvB8xAkWdhFyr0ZUNZcxQ=
github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
go.opentelemetry.io/otel v1.0.0-RC1 h1:4CeoX93DNTWt8awGK9JmNXzF9j7TyOu9upscEdtcdXc=
go.opentelemetry.io/otel v1.0.0-RC1/go.mod h1:x9tRa9HK4hSSq7jf2TKbqFbtt58/TGk0f9XiEYISI1I=
go.opentelemetry.io/otel/internal/metric v0.21.0 h1:gZlIBo5O51hZOOZz8vEcuRx/l5dnADadKfpT70AELoo=
go.opentelemetry.io/otel/internal/metric v0.21.0/go.mod h1:iOfAaY2YycsXfYD4kaRSbLx2LKmfpKObWBEv9QK5zFo=
go.opentelemetry.io/otel/metric v0.21.0 h1:ZtcJlHqVE4l8Su0WOLOd9fEPheJuYEiQ0wr9wv2p25I=
go.opentelemetry.io/otel/metric v0.21.0/go.mod h1:JWCt1bjivC4iCrz/aCrM1GSw+ZcvY44KCbaeeRhzHnc=
go.opentelemetry.io/otel/oteltest v1.0.0-RC1 h1:G685iP3XiskCwk/z0eIabL55XUl2gk0cljhGk9sB0Yk=
go.opentelemetry.io/otel/oteltest v1.0.0-RC1/go.mod h1:+eoIG0gdEOaPNftuy1YScLr1Gb4mL/9lpDkZ0JjMRq4=
go.opentelemetry.io/otel/trace v1.0.0-RC1 h1:jrjqKJZEibFrDz+umEASeU3LvdVyWKlnTh7XEfwrT58=
go.opentelemetry.io/otel/trace v1.0.0-RC1/go.mod h1:86UHmyHWFEtWjfWPSbu0+d0Pf9Q6e1U+3ViBOc+NXAg=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

235
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/handler.go generated vendored Normal file
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package otelhttp
import (
"io"
"net/http"
"time"
"github.com/felixge/httpsnoop"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/metric"
"go.opentelemetry.io/otel/propagation"
semconv "go.opentelemetry.io/otel/semconv/v1.4.0"
"go.opentelemetry.io/otel/trace"
)
var _ http.Handler = &Handler{}
// Handler is http middleware that corresponds to the http.Handler interface and
// is designed to wrap a http.Mux (or equivalent), while individual routes on
// the mux are wrapped with WithRouteTag. A Handler will add various attributes
// to the span using the attribute.Keys defined in this package.
type Handler struct {
operation string
handler http.Handler
tracer trace.Tracer
meter metric.Meter
propagators propagation.TextMapPropagator
spanStartOptions []trace.SpanStartOption
readEvent bool
writeEvent bool
filters []Filter
spanNameFormatter func(string, *http.Request) string
counters map[string]metric.Int64Counter
valueRecorders map[string]metric.Int64ValueRecorder
}
func defaultHandlerFormatter(operation string, _ *http.Request) string {
return operation
}
// NewHandler wraps the passed handler, functioning like middleware, in a span
// named after the operation and with any provided Options.
func NewHandler(handler http.Handler, operation string, opts ...Option) http.Handler {
h := Handler{
handler: handler,
operation: operation,
}
defaultOpts := []Option{
WithSpanOptions(trace.WithSpanKind(trace.SpanKindServer)),
WithSpanNameFormatter(defaultHandlerFormatter),
}
c := newConfig(append(defaultOpts, opts...)...)
h.configure(c)
h.createMeasures()
return &h
}
func (h *Handler) configure(c *config) {
h.tracer = c.Tracer
h.meter = c.Meter
h.propagators = c.Propagators
h.spanStartOptions = c.SpanStartOptions
h.readEvent = c.ReadEvent
h.writeEvent = c.WriteEvent
h.filters = c.Filters
h.spanNameFormatter = c.SpanNameFormatter
}
func handleErr(err error) {
if err != nil {
otel.Handle(err)
}
}
func (h *Handler) createMeasures() {
h.counters = make(map[string]metric.Int64Counter)
h.valueRecorders = make(map[string]metric.Int64ValueRecorder)
requestBytesCounter, err := h.meter.NewInt64Counter(RequestContentLength)
handleErr(err)
responseBytesCounter, err := h.meter.NewInt64Counter(ResponseContentLength)
handleErr(err)
serverLatencyMeasure, err := h.meter.NewInt64ValueRecorder(ServerLatency)
handleErr(err)
h.counters[RequestContentLength] = requestBytesCounter
h.counters[ResponseContentLength] = responseBytesCounter
h.valueRecorders[ServerLatency] = serverLatencyMeasure
}
// ServeHTTP serves HTTP requests (http.Handler)
func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
requestStartTime := time.Now()
for _, f := range h.filters {
if !f(r) {
// Simply pass through to the handler if a filter rejects the request
h.handler.ServeHTTP(w, r)
return
}
}
opts := append([]trace.SpanStartOption{
trace.WithAttributes(semconv.NetAttributesFromHTTPRequest("tcp", r)...),
trace.WithAttributes(semconv.EndUserAttributesFromHTTPRequest(r)...),
trace.WithAttributes(semconv.HTTPServerAttributesFromHTTPRequest(h.operation, "", r)...),
}, h.spanStartOptions...) // start with the configured options
tracer := h.tracer
if tracer == nil {
if span := trace.SpanFromContext(r.Context()); span.SpanContext().IsValid() {
tracer = newTracer(span.TracerProvider())
} else {
tracer = newTracer(otel.GetTracerProvider())
}
}
ctx := h.propagators.Extract(r.Context(), propagation.HeaderCarrier(r.Header))
ctx, span := tracer.Start(ctx, h.spanNameFormatter(h.operation, r), opts...)
defer span.End()
readRecordFunc := func(int64) {}
if h.readEvent {
readRecordFunc = func(n int64) {
span.AddEvent("read", trace.WithAttributes(ReadBytesKey.Int64(n)))
}
}
var bw bodyWrapper
// if request body is nil we don't want to mutate the body as it will affect
// the identity of it in a unforeseeable way because we assert ReadCloser
// fullfills a certain interface and it is indeed nil.
if r.Body != nil {
bw.ReadCloser = r.Body
bw.record = readRecordFunc
r.Body = &bw
}
writeRecordFunc := func(int64) {}
if h.writeEvent {
writeRecordFunc = func(n int64) {
span.AddEvent("write", trace.WithAttributes(WroteBytesKey.Int64(n)))
}
}
rww := &respWriterWrapper{ResponseWriter: w, record: writeRecordFunc, ctx: ctx, props: h.propagators}
// Wrap w to use our ResponseWriter methods while also exposing
// other interfaces that w may implement (http.CloseNotifier,
// http.Flusher, http.Hijacker, http.Pusher, io.ReaderFrom).
w = httpsnoop.Wrap(w, httpsnoop.Hooks{
Header: func(httpsnoop.HeaderFunc) httpsnoop.HeaderFunc {
return rww.Header
},
Write: func(httpsnoop.WriteFunc) httpsnoop.WriteFunc {
return rww.Write
},
WriteHeader: func(httpsnoop.WriteHeaderFunc) httpsnoop.WriteHeaderFunc {
return rww.WriteHeader
},
})
labeler := &Labeler{}
ctx = injectLabeler(ctx, labeler)
h.handler.ServeHTTP(w, r.WithContext(ctx))
setAfterServeAttributes(span, bw.read, rww.written, rww.statusCode, bw.err, rww.err)
// Add metrics
attributes := append(labeler.Get(), semconv.HTTPServerMetricAttributesFromHTTPRequest(h.operation, r)...)
h.counters[RequestContentLength].Add(ctx, bw.read, attributes...)
h.counters[ResponseContentLength].Add(ctx, rww.written, attributes...)
elapsedTime := time.Since(requestStartTime).Microseconds()
h.valueRecorders[ServerLatency].Record(ctx, elapsedTime, attributes...)
}
func setAfterServeAttributes(span trace.Span, read, wrote int64, statusCode int, rerr, werr error) {
attributes := []attribute.KeyValue{}
// TODO: Consider adding an event after each read and write, possibly as an
// option (defaulting to off), so as to not create needlessly verbose spans.
if read > 0 {
attributes = append(attributes, ReadBytesKey.Int64(read))
}
if rerr != nil && rerr != io.EOF {
attributes = append(attributes, ReadErrorKey.String(rerr.Error()))
}
if wrote > 0 {
attributes = append(attributes, WroteBytesKey.Int64(wrote))
}
if statusCode > 0 {
attributes = append(attributes, semconv.HTTPAttributesFromHTTPStatusCode(statusCode)...)
span.SetStatus(semconv.SpanStatusFromHTTPStatusCode(statusCode))
}
if werr != nil && werr != io.EOF {
attributes = append(attributes, WriteErrorKey.String(werr.Error()))
}
span.SetAttributes(attributes...)
}
// WithRouteTag annotates a span with the provided route name using the
// RouteKey Tag.
func WithRouteTag(route string, h http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
span := trace.SpanFromContext(r.Context())
span.SetAttributes(semconv.HTTPRouteKey.String(route))
h.ServeHTTP(w, r)
})
}

65
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/labeler.go generated vendored Normal file
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package otelhttp
import (
"context"
"sync"
"go.opentelemetry.io/otel/attribute"
)
// Labeler is used to allow instrumented HTTP handlers to add custom attributes to
// the metrics recorded by the net/http instrumentation.
type Labeler struct {
mu sync.Mutex
attributes []attribute.KeyValue
}
// Add attributes to a Labeler.
func (l *Labeler) Add(ls ...attribute.KeyValue) {
l.mu.Lock()
defer l.mu.Unlock()
l.attributes = append(l.attributes, ls...)
}
// Get returns a copy of the attributes added to the Labeler.
func (l *Labeler) Get() []attribute.KeyValue {
l.mu.Lock()
defer l.mu.Unlock()
ret := make([]attribute.KeyValue, len(l.attributes))
copy(ret, l.attributes)
return ret
}
type labelerContextKeyType int
const lablelerContextKey labelerContextKeyType = 0
func injectLabeler(ctx context.Context, l *Labeler) context.Context {
return context.WithValue(ctx, lablelerContextKey, l)
}
// LabelerFromContext retrieves a Labeler instance from the provided context if
// one is available. If no Labeler was found in the provided context a new, empty
// Labeler is returned and the second return value is false. In this case it is
// safe to use the Labeler but any attributes added to it will not be used.
func LabelerFromContext(ctx context.Context) (*Labeler, bool) {
l, ok := ctx.Value(lablelerContextKey).(*Labeler)
if !ok {
l = &Labeler{}
}
return l, ok
}

154
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/transport.go generated vendored Normal file
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package otelhttp
import (
"context"
"io"
"net/http"
"net/http/httptrace"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/propagation"
semconv "go.opentelemetry.io/otel/semconv/v1.4.0"
"go.opentelemetry.io/otel/trace"
)
// Transport implements the http.RoundTripper interface and wraps
// outbound HTTP(S) requests with a span.
type Transport struct {
rt http.RoundTripper
tracer trace.Tracer
propagators propagation.TextMapPropagator
spanStartOptions []trace.SpanStartOption
filters []Filter
spanNameFormatter func(string, *http.Request) string
clientTrace func(context.Context) *httptrace.ClientTrace
}
var _ http.RoundTripper = &Transport{}
// NewTransport wraps the provided http.RoundTripper with one that
// starts a span and injects the span context into the outbound request headers.
//
// If the provided http.RoundTripper is nil, http.DefaultTransport will be used
// as the base http.RoundTripper
func NewTransport(base http.RoundTripper, opts ...Option) *Transport {
if base == nil {
base = http.DefaultTransport
}
t := Transport{
rt: base,
}
defaultOpts := []Option{
WithSpanOptions(trace.WithSpanKind(trace.SpanKindClient)),
WithSpanNameFormatter(defaultTransportFormatter),
}
c := newConfig(append(defaultOpts, opts...)...)
t.applyConfig(c)
return &t
}
func (t *Transport) applyConfig(c *config) {
t.tracer = c.Tracer
t.propagators = c.Propagators
t.spanStartOptions = c.SpanStartOptions
t.filters = c.Filters
t.spanNameFormatter = c.SpanNameFormatter
t.clientTrace = c.ClientTrace
}
func defaultTransportFormatter(_ string, r *http.Request) string {
return "HTTP " + r.Method
}
// RoundTrip creates a Span and propagates its context via the provided request's headers
// before handing the request to the configured base RoundTripper. The created span will
// end when the response body is closed or when a read from the body returns io.EOF.
func (t *Transport) RoundTrip(r *http.Request) (*http.Response, error) {
for _, f := range t.filters {
if !f(r) {
// Simply pass through to the base RoundTripper if a filter rejects the request
return t.rt.RoundTrip(r)
}
}
tracer := t.tracer
if tracer == nil {
if span := trace.SpanFromContext(r.Context()); span.SpanContext().IsValid() {
tracer = newTracer(span.TracerProvider())
} else {
tracer = newTracer(otel.GetTracerProvider())
}
}
opts := append([]trace.SpanStartOption{}, t.spanStartOptions...) // start with the configured options
ctx, span := tracer.Start(r.Context(), t.spanNameFormatter("", r), opts...)
if t.clientTrace != nil {
ctx = httptrace.WithClientTrace(ctx, t.clientTrace(ctx))
}
r = r.WithContext(ctx)
span.SetAttributes(semconv.HTTPClientAttributesFromHTTPRequest(r)...)
t.propagators.Inject(ctx, propagation.HeaderCarrier(r.Header))
res, err := t.rt.RoundTrip(r)
if err != nil {
span.RecordError(err)
span.End()
return res, err
}
span.SetAttributes(semconv.HTTPAttributesFromHTTPStatusCode(res.StatusCode)...)
span.SetStatus(semconv.SpanStatusFromHTTPStatusCode(res.StatusCode))
res.Body = &wrappedBody{ctx: ctx, span: span, body: res.Body}
return res, err
}
type wrappedBody struct {
ctx context.Context
span trace.Span
body io.ReadCloser
}
var _ io.ReadCloser = &wrappedBody{}
func (wb *wrappedBody) Read(b []byte) (int, error) {
n, err := wb.body.Read(b)
switch err {
case nil:
// nothing to do here but fall through to the return
case io.EOF:
wb.span.End()
default:
wb.span.RecordError(err)
}
return n, err
}
func (wb *wrappedBody) Close() error {
wb.span.End()
return wb.body.Close()
}

96
vendor/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp/wrap.go generated vendored Normal file
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// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package otelhttp
import (
"context"
"io"
"net/http"
"go.opentelemetry.io/otel/propagation"
)
var _ io.ReadCloser = &bodyWrapper{}
// bodyWrapper wraps a http.Request.Body (an io.ReadCloser) to track the number
// of bytes read and the last error
type bodyWrapper struct {
io.ReadCloser
record func(n int64) // must not be nil
read int64
err error
}
func (w *bodyWrapper) Read(b []byte) (int, error) {
n, err := w.ReadCloser.Read(b)
n1 := int64(n)
w.read += n1
w.err = err
w.record(n1)
return n, err
}
func (w *bodyWrapper) Close() error {
return w.ReadCloser.Close()
}
var _ http.ResponseWriter = &respWriterWrapper{}
// respWriterWrapper wraps a http.ResponseWriter in order to track the number of
// bytes written, the last error, and to catch the returned statusCode
// TODO: The wrapped http.ResponseWriter doesn't implement any of the optional
// types (http.Hijacker, http.Pusher, http.CloseNotifier, http.Flusher, etc)
// that may be useful when using it in real life situations.
type respWriterWrapper struct {
http.ResponseWriter
record func(n int64) // must not be nil
// used to inject the header
ctx context.Context
props propagation.TextMapPropagator
written int64
statusCode int
err error
wroteHeader bool
}
func (w *respWriterWrapper) Header() http.Header {
return w.ResponseWriter.Header()
}
func (w *respWriterWrapper) Write(p []byte) (int, error) {
if !w.wroteHeader {
w.WriteHeader(http.StatusOK)
}
n, err := w.ResponseWriter.Write(p)
n1 := int64(n)
w.record(n1)
w.written += n1
w.err = err
return n, err
}
func (w *respWriterWrapper) WriteHeader(statusCode int) {
if w.wroteHeader {
return
}
w.wroteHeader = true
w.statusCode = statusCode
w.props.Inject(w.ctx, propagation.HeaderCarrier(w.Header()))
w.ResponseWriter.WriteHeader(statusCode)
}