mirror of
https://github.com/open-telemetry/opentelemetry-go.git
synced 2025-04-15 11:36:44 +02:00
83935b2558
* add propagation api. * add http propagator interface and w3c propagator implementation. * remove Extract api from trace. * remove Extract interface for tracer. * fix copyright. * fix variable names and comments. * move inject/extract out of trace. * replace INVALID_SPAN_CONTEXT with EmptySpanContext function. * fix tag.Map. * make carrier as interface instead of http.Request. * rename structs and update doc comments.. * add doc.go * update doc. * add noop propagator. * add new propagation api with Supplier interface. - added Default Tracer which simply propagates SpanContext. - added CopyOfRemote option to simply create remote span. * remove old propagator. * rename propagator to TextFormatPropagator. * rename default tracer/span as pass_through tracer/span. * add test for pass through tracer. * add missing interface to pass through tracer. * return SpanContext instead of contex.Context from Extract interface. - also remove PassThroughTracer * fix review comments. * add more test cases for traceContext extraction. * remove tidy temporarily from circle-ci target to avoid build failure. * allow header ending in dash '-'. * add inject test for non-zero value other than 01 for traceoption * add AddLink and Link interface to MockSpan * fix running go mod tidy on every build.
52 lines
1.3 KiB
Go
52 lines
1.3 KiB
Go
// Copyright 2019, OpenTelemetry Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package httptrace
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import (
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"context"
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"net/http"
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"go.opentelemetry.io/api/core"
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"go.opentelemetry.io/api/key"
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"go.opentelemetry.io/propagation"
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)
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const (
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Vendor = "ot"
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)
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var (
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HostKey = key.New("http.host")
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URLKey = key.New("http.url")
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propagator = propagation.HttpTraceContextPropagator()
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)
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// Returns the Attributes, Context Tags, and SpanContext that were encoded by Inject.
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func Extract(ctx context.Context, req *http.Request) ([]core.KeyValue, []core.KeyValue, core.SpanContext) {
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sc := propagator.Extract(ctx, req.Header)
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attrs := []core.KeyValue{
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URLKey.String(req.URL.String()),
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// Etc.
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}
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return attrs, nil, sc
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}
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func Inject(ctx context.Context, req *http.Request) {
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propagator.Inject(ctx, req.Header)
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}
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