Hi!

I ran into the error below when trying to use protocolRewrite (or hostRewrite).

I think the reason is I have configured the proxy options "target" as an object, e.g.
target: {
host: 'www.example.com',
port: 443,
protocol: 'https:'
}

I assume that, if the options.target property is an object, the URL string version could be built from the options.target object properties...

Cheers
-jo

TypeError [ERR_INVALID_ARG_TYPE]: The "url" argument must be of type string. Received type object
at Url.parse (url.js:154:11)
at Object.urlParse [as parse] (url.js:148:13)
at Array.setRedirectHostRewrite (/Users/jo/Timegrip/gitkraken/europris-proxy/node_modules/http-proxy/lib/http-proxy/passes/web-outgoing.js:54:24)
at ClientRequest. (/Users/jo/Timegrip/gitkraken/europris-proxy/node_modules/http-proxy/lib/http-proxy/passes/web-incoming.js:175:22)
at ClientRequest.emit (events.js:189:13)
at HTTPParser.parserOnIncomingClient [as onIncoming] (_http_client.js:556:21)
at HTTPParser.parserOnHeadersComplete (_http_common.js:109:17)
at TLSSocket.socketOnData (_http_client.js:442:20)
at TLSSocket.emit (events.js:189:13)
at addChunk (_stream_readable.js:284:12)

https://github.com/nodejitsu/node-http-proxy/blob/master/lib/http-proxy/passes/web-outgoing.js

54 var target = url.parse(options.target);