| 1 | /**
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| 2 | * Copyright 2019, OpenCensus Authors
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| 3 | *
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| 4 | * Licensed under the Apache License, Version 2.0 (the "License");
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| 5 | * you may not use this file except in compliance with the License.
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| 6 | * You may obtain a copy of the License at
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| 7 | *
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| 8 | * http://www.apache.org/licenses/LICENSE-2.0
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| 9 | *
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| 10 | * Unless required by applicable law or agreed to in writing, software
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| 11 | * distributed under the License is distributed on an "AS IS" BASIS,
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| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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| 13 | * See the License for the specific language governing permissions and
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| 14 | * limitations under the License.
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| 15 | */
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| 16 | /**
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| 17 | * This module contains the functions for serializing and deserializing
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| 18 | * TagMap (TagContext) with W3C Correlation Context as the HTTP text format.
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| 19 | * It allows tags to propagate across requests.
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| 20 | *
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| 21 | * OpenCensus uses W3C Correlation Context as the HTTP text format.
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| 22 | * https://github.com/w3c/correlation-context/blob/master/correlation_context/HTTP_HEADER_FORMAT.md
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| 23 | */
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| 24 | import { TagMap } from '../tag-map';
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| 25 | export declare const MAX_NUMBER_OF_TAGS = 180;
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| 26 | /**
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| 27 | * Serializes a given TagMap to the on-the-wire format based on the W3C HTTP
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| 28 | * text format standard.
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| 29 | * @param tagMap The TagMap to serialize.
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| 30 | */
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| 31 | export declare function serializeTextFormat(tagMap: TagMap): string;
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| 32 | /**
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| 33 | * Deserializes input to TagMap based on the W3C HTTP text format standard.
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| 34 | * @param str The TagMap to deserialize.
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| 35 | */
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| 36 | export declare function deserializeTextFormat(str: string): TagMap;
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