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script injecting proxy for Node.JS
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var httpProxy = require('http-proxy'); | |
var url = require('url'); | |
httpProxy.createServer(function(req, res, proxy) { | |
var isHtml = false, | |
write = res.write, | |
writeHead = res.writeHead, | |
params = url.parse(req.url, true).query, | |
dest = params.dest || 'localhost', | |
destination; | |
dest = dest.match(/^http/) ? dest : 'http://' + dest; | |
destination = url.parse(dest, true); | |
req.headers['host'] = destination.host; | |
req.headers['url'] = destination.href; | |
delete req.headers['accept-encoding']; | |
res.writeHead = function(code, headers) { | |
isHtml = headers['content-type'] && headers['content-type'].match('text/html'); | |
writeHead.apply(this, arguments); | |
} | |
res.write = function(data, encoding) { | |
if (isHtml && params.dest) { | |
var str = data.toString(); | |
var scriptTag = '<script type="text/javascript" src="http://code.jquery.com/jquery-1.7.min.js"></script>'; | |
var baseTag = '<base href="' + (dest.replace(/\/$/, '') || '') + '"/>'; | |
str = str.replace(/(<head[^>]*>)/, "$1" + "\n" + scriptTag + "\n" + baseTag); | |
data = new Buffer(str); | |
} | |
write.call(this, data, encoding); | |
}; | |
proxy.proxyRequest(req, res, { | |
host: destination.host, | |
port: 80, | |
}); | |
}).listen(9000, function () { | |
console.log("Waiting for requests..."); | |
}); |
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