なんかもうめっちゃ変えた

packages/backend/src/core/HttpRequestService.ts

@@ -0,0 +1,154 @@
+import * as http from 'node:http';
+import * as https from 'node:https';
+import CacheableLookup from 'cacheable-lookup';
+import fetch from 'node-fetch';
+import { HttpProxyAgent, HttpsProxyAgent } from 'hpagent';
+import { Inject, Injectable } from '@nestjs/common';
+import { DI } from '@/di-symbols.js';
+import { Config } from '@/config.js';
+import { StatusError } from '@/misc/status-error.js';
+import type { Response } from 'node-fetch';
+import type { URL } from 'node:url';
+
+@Injectable()
+export class HttpRequestService {
+	/**
+	 * Get http non-proxy agent
+	 */
+	#http: http.Agent;
+
+	/**
+	 * Get https non-proxy agent
+	 */
+	#https: https.Agent;
+
+	/**
+	 * Get http proxy or non-proxy agent
+	 */
+	public httpAgent: http.Agent;
+
+	/**
+	 * Get https proxy or non-proxy agent
+	 */
+	public httpsAgent: https.Agent;
+
+	constructor(
+		@Inject(DI.config)
+		private config: Config,
+	) {
+		const cache = new CacheableLookup({
+			maxTtl: 3600,	// 1hours
+			errorTtl: 30,	// 30secs
+			lookup: false,	// nativeのdns.lookupにfallbackしない
+		});
+		
+		this.#http = new http.Agent({
+			keepAlive: true,
+			keepAliveMsecs: 30 * 1000,
+			lookup: cache.lookup,
+		} as http.AgentOptions);
+		
+		this.#https = new https.Agent({
+			keepAlive: true,
+			keepAliveMsecs: 30 * 1000,
+			lookup: cache.lookup,
+		} as https.AgentOptions);
+		
+		const maxSockets = Math.max(256, config.deliverJobConcurrency ?? 128);
+		
+		this.httpAgent = config.proxy
+			? new HttpProxyAgent({
+				keepAlive: true,
+				keepAliveMsecs: 30 * 1000,
+				maxSockets,
+				maxFreeSockets: 256,
+				scheduling: 'lifo',
+				proxy: config.proxy,
+			})
+			: this.#http;
+
+		this.httpsAgent = config.proxy
+			? new HttpsProxyAgent({
+				keepAlive: true,
+				keepAliveMsecs: 30 * 1000,
+				maxSockets,
+				maxFreeSockets: 256,
+				scheduling: 'lifo',
+				proxy: config.proxy,
+			})
+			: this.#https;
+	}
+
+	/**
+	 * Get agent by URL
+	 * @param url URL
+	 * @param bypassProxy Allways bypass proxy
+	 */
+	public getAgentByUrl(url: URL, bypassProxy = false): http.Agent | https.Agent {
+		if (bypassProxy || (this.config.proxyBypassHosts || []).includes(url.hostname)) {
+			return url.protocol === 'http:' ? this.#http : this.#https;
+		} else {
+			return url.protocol === 'http:' ? this.httpAgent : this.httpsAgent;
+		}
+	}
+
+	public async getJson(url: string, accept = 'application/json, */*', timeout = 10000, headers?: Record<string, string>): Promise<unknown> {
+		const res = await this.getResponse({
+			url,
+			method: 'GET',
+			headers: Object.assign({
+				'User-Agent': this.config.userAgent,
+				Accept: accept,
+			}, headers ?? {}),
+			timeout,
+		});
+
+		return await res.json();
+	}
+
+	public async getHtml(url: string, accept = 'text/html, */*', timeout = 10000, headers?: Record<string, string>): Promise<string> {
+		const res = await this.getResponse({
+			url,
+			method: 'GET',
+			headers: Object.assign({
+				'User-Agent': this.config.userAgent,
+				Accept: accept,
+			}, headers ?? {}),
+			timeout,
+		});
+
+		return await res.text();
+	}
+
+	public async getResponse(args: {
+		url: string,
+		method: string,
+		body?: string,
+		headers: Record<string, string>,
+		timeout?: number,
+		size?: number,
+	}): Promise<Response> {
+		const timeout = args.timeout ?? 10 * 1000;
+
+		const controller = new AbortController();
+		setTimeout(() => {
+			controller.abort();
+		}, timeout * 6);
+
+		const res = await fetch(args.url, {
+			method: args.method,
+			headers: args.headers,
+			body: args.body,
+			timeout,
+			size: args.size ?? 10 * 1024 * 1024,
+			agent: (url) => this.getAgentByUrl(url),
+			signal: controller.signal,
+		});
+
+		if (!res.ok) {
+			throw new StatusError(`${res.status} ${res.statusText}`, res.status, res.statusText);
+		}
+
+		return res;
+	}
+}