http-proxy-middleware/dist/legacy/options-adapter.js

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

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.legacyOptionsAdapter = legacyOptionsAdapter;
const url = require("url");
const debug_1 = require("../debug");
const logger_1 = require("../logger");
const debug = debug_1.Debug.extend('legacy-options-adapter');
// https://github.com/chimurai/http-proxy-middleware/blob/7341704d0aa9d1606dfd37ebfdffddd34c894784/src/_handlers.ts#L20-L27
const proxyEventMap = {
    onError: 'error',
    onProxyReq: 'proxyReq',
    onProxyRes: 'proxyRes',
    onProxyReqWs: 'proxyReqWs',
    onOpen: 'open',
    onClose: 'close',
};
/**
 * Convert {@link LegacyOptions legacy Options} to new {@link Options}
 */
function legacyOptionsAdapter(legacyContext, legacyOptions) {
    let options = {};
    let logger;
    // https://github.com/chimurai/http-proxy-middleware/pull/716
    if (typeof legacyContext === 'string' && !!url.parse(legacyContext).host) {
        throw new Error(`Shorthand syntax is removed from legacyCreateProxyMiddleware().
      Please use "legacyCreateProxyMiddleware({ target: 'http://www.example.org' })" instead.

      More details: https://github.com/chimurai/http-proxy-middleware/blob/master/MIGRATION.md#removed-shorthand-usage
      `);
    }
    // detect old "context" argument and convert to "options.pathFilter"
    // https://github.com/chimurai/http-proxy-middleware/pull/722/files#diff-a2a171449d862fe29692ce031981047d7ab755ae7f84c707aef80701b3ea0c80L4
    if (legacyContext && legacyOptions) {
        debug('map legacy context/filter to options.pathFilter');
        options = { ...legacyOptions, pathFilter: legacyContext };
        logger = getLegacyLogger(options);
        logger.warn(`[http-proxy-middleware] Legacy "context" argument is deprecated. Migrate your "context" to "options.pathFilter":

      const options = {
        pathFilter: '${legacyContext}',
      }

      More details: https://github.com/chimurai/http-proxy-middleware/blob/master/MIGRATION.md#removed-context-argument
      `);
    }
    else if (legacyContext && !legacyOptions) {
        options = { ...legacyContext };
        logger = getLegacyLogger(options);
    }
    else {
        logger = getLegacyLogger({});
    }
    // map old event names to new event names
    // https://github.com/chimurai/http-proxy-middleware/pull/745/files#diff-c54113cf61ec99691748a3890bfbeb00e10efb3f0a76f03a0fd9ec49072e410aL48-L53
    Object.entries(proxyEventMap).forEach(([legacyEventName, proxyEventName]) => {
        if (options[legacyEventName]) {
            options.on = { ...options.on };
            options.on[proxyEventName] = options[legacyEventName];
            debug('map legacy event "%s" to "on.%s"', legacyEventName, proxyEventName);
            logger.warn(`[http-proxy-middleware] Legacy "${legacyEventName}" is deprecated. Migrate to "options.on.${proxyEventName}":

        const options = {
          on: {
            ${proxyEventName}: () => {},
          },
        }

        More details: https://github.com/chimurai/http-proxy-middleware/blob/master/MIGRATION.md#refactored-proxy-events
        `);
        }
    });
    // map old logProvider to new logger
    // https://github.com/chimurai/http-proxy-middleware/pull/749
    const logProvider = options.logProvider && options.logProvider();
    const logLevel = options.logLevel;
    debug('legacy logLevel', logLevel);
    debug('legacy logProvider: %O', logProvider);
    if (typeof logLevel === 'string' && logLevel !== 'silent') {
        debug('map "logProvider" to "logger"');
        logger.warn(`[http-proxy-middleware] Legacy "logLevel" and "logProvider" are deprecated. Migrate to "options.logger":

      const options = {
        logger: console,
      }

      More details: https://github.com/chimurai/http-proxy-middleware/blob/master/MIGRATION.md#removed-logprovider-and-loglevel-options
      `);
    }
    return options;
}
function getLegacyLogger(options) {
    const legacyLogger = options.logProvider && options.logProvider();
    if (legacyLogger) {
        options.logger = legacyLogger;
    }
    return (0, logger_1.getLogger)(options);
}