@opentelemetry/core
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OpenTelemetry Core provides constants and utilities shared by all OpenTelemetry SDK packages.
69 lines • 2.95 kB
JavaScript
/*
* 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
*
* https://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.
*/
import { baggageEntryMetadataFromString, } from '@opentelemetry/api';
import { BAGGAGE_ITEMS_SEPARATOR, BAGGAGE_PROPERTIES_SEPARATOR, BAGGAGE_KEY_PAIR_SEPARATOR, BAGGAGE_MAX_TOTAL_LENGTH, } from './constants';
export function serializeKeyPairs(keyPairs) {
return keyPairs.reduce((hValue, current) => {
const value = `${hValue}${hValue !== '' ? BAGGAGE_ITEMS_SEPARATOR : ''}${current}`;
return value.length > BAGGAGE_MAX_TOTAL_LENGTH ? hValue : value;
}, '');
}
export function getKeyPairs(baggage) {
return baggage.getAllEntries().map(([key, value]) => {
let entry = `${encodeURIComponent(key)}=${encodeURIComponent(value.value)}`;
// include opaque metadata if provided
// NOTE: we intentionally don't URI-encode the metadata - that responsibility falls on the metadata implementation
if (value.metadata !== undefined) {
entry += BAGGAGE_PROPERTIES_SEPARATOR + value.metadata.toString();
}
return entry;
});
}
export function parsePairKeyValue(entry) {
const valueProps = entry.split(BAGGAGE_PROPERTIES_SEPARATOR);
if (valueProps.length <= 0)
return;
const keyPairPart = valueProps.shift();
if (!keyPairPart)
return;
const separatorIndex = keyPairPart.indexOf(BAGGAGE_KEY_PAIR_SEPARATOR);
if (separatorIndex <= 0)
return;
const key = decodeURIComponent(keyPairPart.substring(0, separatorIndex).trim());
const value = decodeURIComponent(keyPairPart.substring(separatorIndex + 1).trim());
let metadata;
if (valueProps.length > 0) {
metadata = baggageEntryMetadataFromString(valueProps.join(BAGGAGE_PROPERTIES_SEPARATOR));
}
return { key, value, metadata };
}
/**
* Parse a string serialized in the baggage HTTP Format (without metadata):
* https://github.com/w3c/baggage/blob/master/baggage/HTTP_HEADER_FORMAT.md
*/
export function parseKeyPairsIntoRecord(value) {
const result = {};
if (typeof value === 'string' && value.length > 0) {
value.split(BAGGAGE_ITEMS_SEPARATOR).forEach(entry => {
const keyPair = parsePairKeyValue(entry);
if (keyPair !== undefined && keyPair.value.length > 0) {
result[keyPair.key] = keyPair.value;
}
});
}
return result;
}
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