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89 lines
2.5 KiB
89 lines
2.5 KiB
const https = require("https");
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const http = require("http");
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const CacheableLookup = require("cacheable-lookup");
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const { Settings } = require("./settings");
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const { log } = require("../src/util");
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class CacheableDnsHttpAgent {
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static cacheable = new CacheableLookup();
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static httpAgentList = {};
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static httpsAgentList = {};
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static enable = false;
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/**
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* Register/Disable cacheable to global agents
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* @returns {void}
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*/
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static async update() {
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log.debug("CacheableDnsHttpAgent", "update");
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let isEnable = await Settings.get("dnsCache");
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if (isEnable !== this.enable) {
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log.debug("CacheableDnsHttpAgent", "value changed");
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if (isEnable) {
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log.debug("CacheableDnsHttpAgent", "enable");
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this.cacheable.install(http.globalAgent);
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this.cacheable.install(https.globalAgent);
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} else {
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log.debug("CacheableDnsHttpAgent", "disable");
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this.cacheable.uninstall(http.globalAgent);
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this.cacheable.uninstall(https.globalAgent);
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}
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}
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this.enable = isEnable;
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}
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/**
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* Attach cacheable to HTTP agent
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* @param {http.Agent} agent Agent to install
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* @returns {void}
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*/
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static install(agent) {
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this.cacheable.install(agent);
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}
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/**
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* @param {https.AgentOptions} agentOptions Options to pass to HTTPS agent
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* @returns {https.Agent} The new HTTPS agent
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*/
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static getHttpsAgent(agentOptions) {
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if (!this.enable) {
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return new https.Agent(agentOptions);
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}
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let key = JSON.stringify(agentOptions);
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if (!(key in this.httpsAgentList)) {
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this.httpsAgentList[key] = new https.Agent(agentOptions);
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this.cacheable.install(this.httpsAgentList[key]);
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}
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return this.httpsAgentList[key];
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}
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/**
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* @param {http.AgentOptions} agentOptions Options to pass to the HTTP agent
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* @returns {https.Agents} The new HTTP agent
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*/
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static getHttpAgent(agentOptions) {
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if (!this.enable) {
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return new http.Agent(agentOptions);
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}
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let key = JSON.stringify(agentOptions);
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if (!(key in this.httpAgentList)) {
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this.httpAgentList[key] = new http.Agent(agentOptions);
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this.cacheable.install(this.httpAgentList[key]);
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}
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return this.httpAgentList[key];
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}
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}
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module.exports = {
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CacheableDnsHttpAgent,
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};
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