39 lines
947 B
JavaScript
39 lines
947 B
JavaScript
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// @flow
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import {Agent} from 'http';
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export const DESTROY_TIMEOUT_MS = 5000;
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export class AgentManager {
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_agent: Agent = AgentManager._newAgent();
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_activeRequests = 0;
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_destroyTimeout: TimeoutID | null = null;
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static _newAgent(): Agent {
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return new Agent({keepAlive: true, maxSockets: 25});
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}
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requestStart(): Agent {
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// $FlowExpectedError - Don't manage agents in the browser
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if (process.browser) return;
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this._activeRequests++;
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clearTimeout(this._destroyTimeout);
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this._destroyTimeout = null;
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return this._agent;
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}
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requestEnd() {
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// $FlowExpectedError - Don't manage agents in the browser
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if (process.browser) return;
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this._activeRequests--;
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if (this._activeRequests === 0 && this._destroyTimeout === null) {
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this._destroyTimeout = setTimeout(() => {
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this._agent.destroy();
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this._agent = AgentManager._newAgent();
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}, DESTROY_TIMEOUT_MS);
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}
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}
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}
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