Matt Hauck 7f2f3ac35c Add support for auto host rewriting and protocol rewriting
auto host rewriting allows rewriting to work as expected in most
cases without extra cumbersome configuration

protocol rewriting allows node-http-proxy to be able to listen
over HTTPS and properly reverse-proxy to sites running over HTTP
(to avoid doing SSL twice)
2015-02-05 12:17:26 -08:00

99 lines
2.7 KiB
JavaScript
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var url = require('url'),
passes = exports;
var redirectRegex = /^30(1|2|7|8)$/;
/*!
* Array of passes.
*
* A `pass` is just a function that is executed on `req, res, options`
* so that you can easily add new checks while still keeping the base
* flexible.
*/
[ // <--
/**
* If is a HTTP 1.0 request, remove chunk headers
*
* @param {ClientRequest} Req Request object
* @param {IncomingMessage} Res Response object
* @param {proxyResponse} Res Response object from the proxy request
*
* @api private
*/
function removeChunked(req, res, proxyRes) {
if (req.httpVersion === '1.0') {
delete proxyRes.headers['transfer-encoding'];
}
},
/**
* If is a HTTP 1.0 request, set the correct connection header
* or if connection header not present, then use `keep-alive`
*
* @param {ClientRequest} Req Request object
* @param {IncomingMessage} Res Response object
* @param {proxyResponse} Res Response object from the proxy request
*
* @api private
*/
function setConnection(req, res, proxyRes) {
if (req.httpVersion === '1.0') {
proxyRes.headers.connection = req.headers.connection || 'close';
} else if (!proxyRes.headers.connection) {
proxyRes.headers.connection = req.headers.connection || 'keep-alive';
}
},
function setRedirectHostRewrite(req, res, proxyRes, options) {
if ((options.hostRewrite || options.autoRewrite || options.protocolRewrite)
&& proxyRes.headers['location']
&& redirectRegex.test(proxyRes.statusCode)) {
var u = url.parse(proxyRes.headers['location']);
if (options.hostRewrite) {
u.host = options.hostRewrite;
} else if (options.autoRewrite) {
u.host = req.headers['host'];
}
if (options.protocolRewrite) {
u.protocol = options.protocolRewrite;
}
proxyRes.headers['location'] = u.format();
}
},
/**
* Copy headers from proxyResponse to response
* set each header in response object.
*
* @param {ClientRequest} Req Request object
* @param {IncomingMessage} Res Response object
* @param {proxyResponse} Res Response object from the proxy request
*
* @api private
*/
function writeHeaders(req, res, proxyRes) {
Object.keys(proxyRes.headers).forEach(function(key) {
res.setHeader(key, proxyRes.headers[key]);
});
},
/**
* Set the statusCode from the proxyResponse
*
* @param {ClientRequest} Req Request object
* @param {IncomingMessage} Res Response object
* @param {proxyResponse} Res Response object from the proxy request
*
* @api private
*/
function writeStatusCode(req, res, proxyRes) {
res.writeHead(proxyRes.statusCode);
}
] // <--
.forEach(function(func) {
passes[func.name] = func;
});