long stream chain test

longchaintest.js

var crypto = require('crypto')

var hashType = process.argv[2] || 'sha1'
var numHashes = parseInt(process.argv[3] || 1)

// init chain with stdout
var piped = process.stdout

for (var i = 0; i < numHashes; i++) {
    // prepend chain with new hash
    var hash = crypto.createHash(hashType)
    hash.pipe(piped)
    piped = hash
}

//pipe stdin into chain 
process.stdin.pipe(piped)

nodejs/node-v0.x-archive#6065