egg-http-proxy/app/middleware/http_proxy.js

proxy middleware plugin for egg

'use strict';

const proxy = require('http-proxy-middleware');
const c2k = require('koa2-connect');
const pathMatching = require('egg-path-matching');
const omit = require('lodash/omit');

module.exports = options => {
  return async function httpProxy(ctx, next) {
    const proxyTable = omit(options, [ 'enable', 'match', 'ignore' ]);
    const path = ctx.request.originalUrl || ctx.request.url;

    Object.keys(proxyTable).some(context => {
      const match = pathMatching({ match: context });
      const isMatch = match({ path });

      if (isMatch) {
        let proxyOptions = proxyTable[context];
        if (typeof proxyOptions === 'string') {
          proxyOptions = { target: proxyOptions };
        }
        c2k(proxy(context, proxyOptions))(ctx, next);
      }

      return isMatch;
    });

    await next();
  };
};