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http-proxy-middleware

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The one-liner node.js proxy middleware for connect, express, next.js and more

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import type * as http from 'node:http'; import type { Options, RequestHandler } from './types.js'; export declare class HttpProxyMiddleware<TReq extends http.IncomingMessage = http.IncomingMessage, TRes extends http.ServerResponse = http.ServerResponse> { private wsInternalSubscribed; private serverOnCloseSubscribed; private proxyOptions; private proxy; private pathRewriter; private logger; constructor(options: Options<TReq, TRes>); middleware: RequestHandler<TReq, TRes>; private registerPlugins; private catchUpgradeRequest; private handleUpgrade; /** * Determine whether request should be proxied. */ private shouldProxy; /** * Apply option.router and option.pathRewrite * Order matters: * Router uses original path for routing; * NOT the modified path, after it has been rewritten by pathRewrite * @param {Object} req * @return {Object} proxy options */ private prepareProxyRequest; private applyRouter; private applyPathRewrite; }