forgejo/vendor/go.opentelemetry.io/otel/propagation/baggage.go
6543 792b4dba2c
[Vendor] Update directly used dependencys (#15593)
* update github.com/blevesearch/bleve v2.0.2 -> v2.0.3

* github.com/denisenkom/go-mssqldb v0.9.0 -> v0.10.0

* github.com/editorconfig/editorconfig-core-go v2.4.1 -> v2.4.2

* github.com/go-chi/cors v1.1.1 -> v1.2.0

* github.com/go-git/go-billy v5.0.0 -> v5.1.0

* github.com/go-git/go-git v5.2.0 -> v5.3.0

* github.com/go-ldap/ldap v3.2.4 -> v3.3.0

* github.com/go-redis/redis v8.6.0 -> v8.8.2

* github.com/go-sql-driver/mysql v1.5.0 -> v1.6.0

* github.com/go-swagger/go-swagger v0.26.1 -> v0.27.0

* github.com/lib/pq v1.9.0 -> v1.10.1

* github.com/mattn/go-sqlite3 v1.14.6 -> v1.14.7

* github.com/go-testfixtures/testfixtures v3.5.0 -> v3.6.0

* github.com/issue9/identicon v1.0.1 -> v1.2.0

* github.com/klauspost/compress v1.11.8 -> v1.12.1

* github.com/mgechev/revive v1.0.3 -> v1.0.6

* github.com/microcosm-cc/bluemonday v1.0.7 -> v1.0.8

* github.com/niklasfasching/go-org v1.4.0 -> v1.5.0

* github.com/olivere/elastic v7.0.22 -> v7.0.24

* github.com/pelletier/go-toml v1.8.1 -> v1.9.0

* github.com/prometheus/client_golang v1.9.0 -> v1.10.0

* github.com/xanzy/go-gitlab v0.44.0 -> v0.48.0

* github.com/yuin/goldmark v1.3.3 -> v1.3.5

* github.com/6543/go-version v1.2.4 -> v1.3.1

* do github.com/lib/pq v1.10.0 -> v1.10.1 again ...
2021-04-22 20:08:53 -04:00

112 lines
3.4 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"
"net/url"
"strings"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/internal/baggage"
)
const baggageHeader = "baggage"
// Baggage is a propagator that supports the W3C Baggage format.
//
// This propagates user-defined baggage associated with a trace. The complete
// specification is defined at https://w3c.github.io/baggage/.
type Baggage struct{}
var _ TextMapPropagator = Baggage{}
// Inject sets baggage key-values from ctx into the carrier.
func (b Baggage) Inject(ctx context.Context, carrier TextMapCarrier) {
baggageMap := baggage.MapFromContext(ctx)
firstIter := true
var headerValueBuilder strings.Builder
baggageMap.Foreach(func(kv attribute.KeyValue) bool {
if !firstIter {
headerValueBuilder.WriteRune(',')
}
firstIter = false
headerValueBuilder.WriteString(url.QueryEscape(strings.TrimSpace((string)(kv.Key))))
headerValueBuilder.WriteRune('=')
headerValueBuilder.WriteString(url.QueryEscape(strings.TrimSpace(kv.Value.Emit())))
return true
})
if headerValueBuilder.Len() > 0 {
headerString := headerValueBuilder.String()
carrier.Set(baggageHeader, headerString)
}
}
// Extract returns a copy of parent with the baggage from the carrier added.
func (b Baggage) Extract(parent context.Context, carrier TextMapCarrier) context.Context {
bVal := carrier.Get(baggageHeader)
if bVal == "" {
return parent
}
baggageValues := strings.Split(bVal, ",")
keyValues := make([]attribute.KeyValue, 0, len(baggageValues))
for _, baggageValue := range baggageValues {
valueAndProps := strings.Split(baggageValue, ";")
if len(valueAndProps) < 1 {
continue
}
nameValue := strings.Split(valueAndProps[0], "=")
if len(nameValue) < 2 {
continue
}
name, err := url.QueryUnescape(nameValue[0])
if err != nil {
continue
}
trimmedName := strings.TrimSpace(name)
value, err := url.QueryUnescape(nameValue[1])
if err != nil {
continue
}
trimmedValue := strings.TrimSpace(value)
// TODO (skaris): properties defiend https://w3c.github.io/correlation-context/, are currently
// just put as part of the value.
var trimmedValueWithProps strings.Builder
trimmedValueWithProps.WriteString(trimmedValue)
for _, prop := range valueAndProps[1:] {
trimmedValueWithProps.WriteRune(';')
trimmedValueWithProps.WriteString(prop)
}
keyValues = append(keyValues, attribute.String(trimmedName, trimmedValueWithProps.String()))
}
if len(keyValues) > 0 {
// Only update the context if valid values were found
return baggage.ContextWithMap(parent, baggage.NewMap(baggage.MapUpdate{
MultiKV: keyValues,
}))
}
return parent
}
// Fields returns the keys who's values are set with Inject.
func (b Baggage) Fields() []string {
return []string{baggageHeader}
}