gistfile1.js

var http = require('http'),
    sys = require('sys'),
    params = {
        text: '"some text" with +symbols',
        page: 3
    },
    props = Object.getOwnPropertyNames(params),
    body = props.map(function(p){return escape(p) + '=' + escape(params[p])}).join('&'),
    client = http.createClient(80, 'example.com'),
    request = client.request('POST', '/search', {'content-type': 'application/x-www-form-urlencoded')

request.end(body)
request.on('response', function (r) {
    sys.puts('status code: ' + r.statusCode)
    // do something with the response
})