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'use strict'
const http = require('http')
const https = require('https')
const server = http.createServer(handler)
const port = +process.argv[2]
const prefix = process.argv[3]
const upstream = process.argv[4]
var calls = 0
server.listen(port)
function handler (req, res) {
if (req.url.indexOf(prefix) !== 0) {
throw new Error('request url [' + req.url + '] does not start with [' + prefix + ']')
}
var upstreamUrl = upstream + req.url.substring(prefix.length)
https.get(upstreamUrl, function (ures) {
ures.on('end', function () {
if (++calls === 2) {
server.close()
}
})
ures.pipe(res)
})
}
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