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'use strict';

var debug = require('debug')('express-http-proxy');

var isUnset = require('../lib/isUnset');

function resolveBodyEncoding(reqBodyEncoding) {

  /* For reqBodyEncoding, these is a meaningful difference between null and
    * undefined.  null should be passed forward as the value of reqBodyEncoding,
    * and undefined should result in utf-8.
    */
  return reqBodyEncoding !== undefined ? reqBodyEncoding : 'utf-8';
}

// parse client arguments

function resolveOptions(options) {
  options = options || {};
  var resolved;

  if (options.decorateRequest) {
    throw new Error(
      'decorateRequest is REMOVED; use proxyReqOptDecorator and' +
      ' proxyReqBodyDecorator instead.  see README.md'
    );
  }

  if (options.forwardPath || options.forwardPathAsync) {
    console.warn(
      'forwardPath and forwardPathAsync are DEPRECATED' +
      ' and should be replaced with proxyReqPathResolver'
    );
  }

  if (options.intercept) {
    console.warn(
      'DEPRECATED: intercept. Use userResDecorator instead.' +
      ' Please see README for more information.'
    );
  }

  resolved = {
    limit: options.limit || '1mb',
    proxyReqPathResolver: options.proxyReqPathResolver
        || options.forwardPathAsync
        || options.forwardPath,
    proxyReqOptDecorator: options.proxyReqOptDecorator,
    proxyReqBodyDecorator: options.proxyReqBodyDecorator,
    userResDecorator: options.userResDecorator || options.intercept,
    userResHeaderDecorator: options.userResHeaderDecorator,
    proxyErrorHandler: options.proxyErrorHandler,
    filter: options.filter,
    // For backwards compatability, we default to legacy behavior for newly added settings.

    parseReqBody: isUnset(options.parseReqBody) ? true : options.parseReqBody,
    preserveHostHdr: options.preserveHostHdr,
    memoizeHost: isUnset(options.memoizeHost) ? true : options.memoizeHost,
    reqBodyEncoding: resolveBodyEncoding(options.reqBodyEncoding),
    skipToNextHandlerFilter: options.skipToNextHandlerFilter,
    headers: options.headers,
    preserveReqSession: options.preserveReqSession,
    https: options.https,
    port: options.port,
    reqAsBuffer: options.reqAsBuffer,
    timeout: options.timeout
  };

  // automatically opt into stream mode if no response modifiers are specified

  resolved.stream = !resolved.skipToNextHandlerFilter &&
                    !resolved.userResDecorator &&
                    !resolved.userResHeaderDecorator;

  debug(resolved);
  return resolved;
}

module.exports = resolveOptions;

	'use strict';

	var debug = require('debug')('express-http-proxy');

	var isUnset = require('../lib/isUnset');

	function resolveBodyEncoding(reqBodyEncoding) {

	/* For reqBodyEncoding, these is a meaningful difference between null and
	* undefined. null should be passed forward as the value of reqBodyEncoding,
	* and undefined should result in utf-8.
	*/
	return reqBodyEncoding !== undefined ? reqBodyEncoding : 'utf-8';
	}

	// parse client arguments

	function resolveOptions(options) {
	options = options \|\| {};
	var resolved;

	if (options.decorateRequest) {
	throw new Error(
	'decorateRequest is REMOVED; use proxyReqOptDecorator and' +
	' proxyReqBodyDecorator instead. see README.md'
	);
	}

	if (options.forwardPath \|\| options.forwardPathAsync) {
	console.warn(
	'forwardPath and forwardPathAsync are DEPRECATED' +
	' and should be replaced with proxyReqPathResolver'
	);
	}

	if (options.intercept) {
	console.warn(
	'DEPRECATED: intercept. Use userResDecorator instead.' +
	' Please see README for more information.'
	);
	}

	resolved = {
	limit: options.limit \|\| '1mb',
	proxyReqPathResolver: options.proxyReqPathResolver
	\|\| options.forwardPathAsync
	\|\| options.forwardPath,
	proxyReqOptDecorator: options.proxyReqOptDecorator,
	proxyReqBodyDecorator: options.proxyReqBodyDecorator,
	userResDecorator: options.userResDecorator \|\| options.intercept,
	userResHeaderDecorator: options.userResHeaderDecorator,
	proxyErrorHandler: options.proxyErrorHandler,
	filter: options.filter,
	// For backwards compatability, we default to legacy behavior for newly added settings.

	parseReqBody: isUnset(options.parseReqBody) ? true : options.parseReqBody,
	preserveHostHdr: options.preserveHostHdr,
	memoizeHost: isUnset(options.memoizeHost) ? true : options.memoizeHost,
	reqBodyEncoding: resolveBodyEncoding(options.reqBodyEncoding),
	skipToNextHandlerFilter: options.skipToNextHandlerFilter,
	headers: options.headers,
	preserveReqSession: options.preserveReqSession,
	https: options.https,
	port: options.port,
	reqAsBuffer: options.reqAsBuffer,
	timeout: options.timeout
	};

	// automatically opt into stream mode if no response modifiers are specified

	resolved.stream = !resolved.skipToNextHandlerFilter &&
	!resolved.userResDecorator &&
	!resolved.userResHeaderDecorator;

	debug(resolved);
	return resolved;
	}

	module.exports = resolveOptions;