@google-cloud/spanner/build/src/common.js

Cloud Spanner Client Library for Node.js

"use strict";
/*!
 * Copyright 2017 Google Inc. All Rights Reserved.
 *
 * 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
 *
 *      http://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.
 */
Object.defineProperty(exports, "__esModule", { value: true });
exports.END_TO_END_TRACING_HEADER = exports.LEADER_AWARE_ROUTING_HEADER = exports.CLOUD_RESOURCE_HEADER = void 0;
exports.addLeaderAwareRoutingHeader = addLeaderAwareRoutingHeader;
exports.getCommonHeaders = getCommonHeaders;
/*!
 * HTTP header for the resource prefix to improve routing
 * by the backend.
 */
exports.CLOUD_RESOURCE_HEADER = 'google-cloud-resource-prefix';
/*!
 * HTTP header to route the requests at Leader
 */
exports.LEADER_AWARE_ROUTING_HEADER = 'x-goog-spanner-route-to-leader';
/*
 * END TO END TRACING  header.
 */
exports.END_TO_END_TRACING_HEADER = 'x-goog-spanner-end-to-end-tracing';
/**
 * Add Leader aware routing header to existing header list.
 * @param headers Existing header list.
 */
function addLeaderAwareRoutingHeader(headers) {
    headers[exports.LEADER_AWARE_ROUTING_HEADER] = 'true';
}
/**
 * Returns common headers to add.
 * @param headers Common header list.
 */
function getCommonHeaders(resourceName, enableTracing) {
    const headers = {};
    if (process.env.SPANNER_ENABLE_END_TO_END_TRACING === 'true' ||
        enableTracing) {
        headers[exports.END_TO_END_TRACING_HEADER] = 'true';
    }
    headers[exports.CLOUD_RESOURCE_HEADER] = resourceName;
    return headers;
}
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