mirror of
https://github.com/go-gitea/gitea.git
synced 2024-08-29 22:24:18 -04:00
* update github.com/PuerkitoBio/goquery * update github.com/alecthomas/chroma * update github.com/blevesearch/bleve/v2 * update github.com/caddyserver/certmagic * update github.com/go-enry/go-enry/v2 * update github.com/go-git/go-billy/v5 * update github.com/go-git/go-git/v5 * update github.com/go-redis/redis/v8 * update github.com/go-testfixtures/testfixtures/v3 * update github.com/jaytaylor/html2text * update github.com/json-iterator/go * update github.com/klauspost/compress * update github.com/markbates/goth * update github.com/mattn/go-isatty * update github.com/mholt/archiver/v3 * update github.com/microcosm-cc/bluemonday * update github.com/minio/minio-go/v7 * update github.com/prometheus/client_golang * update github.com/unrolled/render * update github.com/xanzy/go-gitlab * update github.com/yuin/goldmark * update github.com/yuin/goldmark-highlighting Co-authored-by: techknowlogick <techknowlogick@gitea.io>
179 lines
4.9 KiB
Go
Vendored
179 lines
4.9 KiB
Go
Vendored
// 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 propagation // import "go.opentelemetry.io/otel/propagation"
|
|
|
|
import (
|
|
"context"
|
|
"encoding/hex"
|
|
"fmt"
|
|
"regexp"
|
|
"strings"
|
|
|
|
"go.opentelemetry.io/otel/attribute"
|
|
"go.opentelemetry.io/otel/trace"
|
|
)
|
|
|
|
const (
|
|
supportedVersion = 0
|
|
maxVersion = 254
|
|
traceparentHeader = "traceparent"
|
|
tracestateHeader = "tracestate"
|
|
)
|
|
|
|
// TraceContext is a propagator that supports the W3C Trace Context format
|
|
// (https://www.w3.org/TR/trace-context/)
|
|
//
|
|
// This propagator will propagate the traceparent and tracestate headers to
|
|
// guarantee traces are not broken. It is up to the users of this propagator
|
|
// to choose if they want to participate in a trace by modifying the
|
|
// traceparent header and relevant parts of the tracestate header containing
|
|
// their proprietary information.
|
|
type TraceContext struct{}
|
|
|
|
var _ TextMapPropagator = TraceContext{}
|
|
var traceCtxRegExp = regexp.MustCompile("^(?P<version>[0-9a-f]{2})-(?P<traceID>[a-f0-9]{32})-(?P<spanID>[a-f0-9]{16})-(?P<traceFlags>[a-f0-9]{2})(?:-.*)?$")
|
|
|
|
// Inject set tracecontext from the Context into the carrier.
|
|
func (tc TraceContext) Inject(ctx context.Context, carrier TextMapCarrier) {
|
|
sc := trace.SpanContextFromContext(ctx)
|
|
if !sc.IsValid() {
|
|
return
|
|
}
|
|
|
|
carrier.Set(tracestateHeader, sc.TraceState().String())
|
|
|
|
// Clear all flags other than the trace-context supported sampling bit.
|
|
flags := sc.TraceFlags() & trace.FlagsSampled
|
|
|
|
h := fmt.Sprintf("%.2x-%s-%s-%s",
|
|
supportedVersion,
|
|
sc.TraceID(),
|
|
sc.SpanID(),
|
|
flags)
|
|
carrier.Set(traceparentHeader, h)
|
|
}
|
|
|
|
// Extract reads tracecontext from the carrier into a returned Context.
|
|
//
|
|
// The returned Context will be a copy of ctx and contain the extracted
|
|
// tracecontext as the remote SpanContext. If the extracted tracecontext is
|
|
// invalid, the passed ctx will be returned directly instead.
|
|
func (tc TraceContext) Extract(ctx context.Context, carrier TextMapCarrier) context.Context {
|
|
sc := tc.extract(carrier)
|
|
if !sc.IsValid() {
|
|
return ctx
|
|
}
|
|
return trace.ContextWithRemoteSpanContext(ctx, sc)
|
|
}
|
|
|
|
func (tc TraceContext) extract(carrier TextMapCarrier) trace.SpanContext {
|
|
h := carrier.Get(traceparentHeader)
|
|
if h == "" {
|
|
return trace.SpanContext{}
|
|
}
|
|
|
|
matches := traceCtxRegExp.FindStringSubmatch(h)
|
|
|
|
if len(matches) == 0 {
|
|
return trace.SpanContext{}
|
|
}
|
|
|
|
if len(matches) < 5 { // four subgroups plus the overall match
|
|
return trace.SpanContext{}
|
|
}
|
|
|
|
if len(matches[1]) != 2 {
|
|
return trace.SpanContext{}
|
|
}
|
|
ver, err := hex.DecodeString(matches[1])
|
|
if err != nil {
|
|
return trace.SpanContext{}
|
|
}
|
|
version := int(ver[0])
|
|
if version > maxVersion {
|
|
return trace.SpanContext{}
|
|
}
|
|
|
|
if version == 0 && len(matches) != 5 { // four subgroups plus the overall match
|
|
return trace.SpanContext{}
|
|
}
|
|
|
|
if len(matches[2]) != 32 {
|
|
return trace.SpanContext{}
|
|
}
|
|
|
|
var scc trace.SpanContextConfig
|
|
|
|
scc.TraceID, err = trace.TraceIDFromHex(matches[2][:32])
|
|
if err != nil {
|
|
return trace.SpanContext{}
|
|
}
|
|
|
|
if len(matches[3]) != 16 {
|
|
return trace.SpanContext{}
|
|
}
|
|
scc.SpanID, err = trace.SpanIDFromHex(matches[3])
|
|
if err != nil {
|
|
return trace.SpanContext{}
|
|
}
|
|
|
|
if len(matches[4]) != 2 {
|
|
return trace.SpanContext{}
|
|
}
|
|
opts, err := hex.DecodeString(matches[4])
|
|
if err != nil || len(opts) < 1 || (version == 0 && opts[0] > 2) {
|
|
return trace.SpanContext{}
|
|
}
|
|
// Clear all flags other than the trace-context supported sampling bit.
|
|
scc.TraceFlags = trace.TraceFlags(opts[0]) & trace.FlagsSampled
|
|
|
|
scc.TraceState = parseTraceState(carrier.Get(tracestateHeader))
|
|
scc.Remote = true
|
|
|
|
sc := trace.NewSpanContext(scc)
|
|
if !sc.IsValid() {
|
|
return trace.SpanContext{}
|
|
}
|
|
|
|
return sc
|
|
}
|
|
|
|
// Fields returns the keys who's values are set with Inject.
|
|
func (tc TraceContext) Fields() []string {
|
|
return []string{traceparentHeader, tracestateHeader}
|
|
}
|
|
|
|
func parseTraceState(in string) trace.TraceState {
|
|
if in == "" {
|
|
return trace.TraceState{}
|
|
}
|
|
|
|
kvs := []attribute.KeyValue{}
|
|
for _, entry := range strings.Split(in, ",") {
|
|
parts := strings.SplitN(entry, "=", 2)
|
|
if len(parts) != 2 {
|
|
// Parse failure, abort!
|
|
return trace.TraceState{}
|
|
}
|
|
kvs = append(kvs, attribute.String(parts[0], parts[1]))
|
|
}
|
|
|
|
// Ignoring error here as "failure to parse tracestate MUST NOT
|
|
// affect the parsing of traceparent."
|
|
// https://www.w3.org/TR/trace-context/#tracestate-header
|
|
ts, _ := trace.TraceStateFromKeyValues(kvs...)
|
|
return ts
|
|
}
|