uptime-kuma/server/cacheable-dns-http-agent.js

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