@opentelemetry/web-common
Version:
Common utilities for web instrumentation
32 lines • 1.26 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.
*/
export class DefaultIdGenerator {
generateSessionId = getIdGenerator(16);
}
const SHARED_CHAR_CODES_ARRAY = Array(32);
function getIdGenerator(bytes) {
return function generateId() {
for (let i = 0; i < bytes * 2; i++) {
SHARED_CHAR_CODES_ARRAY[i] = Math.floor(Math.random() * 16) + 48;
// valid hex characters in the range 48-57 and 97-102
if (SHARED_CHAR_CODES_ARRAY[i] >= 58) {
SHARED_CHAR_CODES_ARRAY[i] += 39;
}
}
return String.fromCharCode.apply(null, SHARED_CHAR_CODES_ARRAY.slice(0, bytes * 2));
};
}
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