mirror of https://github.com/istio/proxy.git
38 lines
1.0 KiB
C++
38 lines
1.0 KiB
C++
/* Copyright 2019 Istio Authors. All Rights Reserved.
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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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*/
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#pragma once
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#include <string>
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namespace Envoy {
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namespace Utils {
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// Zipkin B3 headers
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const std::string kTraceID = "x-b3-traceid";
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const std::string kSpanID = "x-b3-spanid";
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const std::string kParentSpanID = "x-b3-parentspanid";
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const std::string kSampled = "x-b3-sampled";
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const std::set<std::string> TracingHeaderSet = {
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kTraceID,
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kSpanID,
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kParentSpanID,
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kSampled,
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};
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} // namespace Utils
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} // namespace Envoy
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