flow like the river

BACK_BACK/node_modules/@elastic/elasticsearch/lib/sniffingTransport.js

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+"use strict";
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you 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 });
+const tslib_1 = require("tslib");
+const assert_1 = tslib_1.__importDefault(require("assert"));
+const transport_1 = require("@elastic/transport");
+class SniffingTransport extends transport_1.Transport {
+    sniff(opts) {
+        var _a;
+        if (this.isSniffing)
+            return;
+        this.isSniffing = true;
+        const request = {
+            method: 'GET',
+            path: (_a = this.sniffEndpoint) !== null && _a !== void 0 ? _a : '/_nodes/_all/http'
+        };
+        this.request(request, { id: opts.requestId, meta: true })
+            .then(result => {
+            var _a, _b;
+            (0, assert_1.default)(isObject(result.body), 'The body should be an object');
+            this.isSniffing = false;
+            const protocol = (_b = (_a = result.meta.connection) === null || _a === void 0 ? void 0 : _a.url.protocol) !== null && _b !== void 0 ? _b : 'http:';
+            const hosts = this.connectionPool.nodesToHost(result.body.nodes, protocol);
+            this.connectionPool.update(hosts);
+            result.meta.sniff = { hosts, reason: opts.reason };
+            this.diagnostic.emit('sniff', null, result);
+        })
+            .catch(err => {
+            this.isSniffing = false;
+            err.meta.sniff = { hosts: [], reason: opts.reason };
+            this.diagnostic.emit('sniff', err, null);
+        });
+    }
+}
+exports.default = SniffingTransport;
+function isObject(obj) {
+    return typeof obj === 'object';
+}
+//# sourceMappingURL=sniffingTransport.js.map