Obtain oauth_token from Launchpad.net using Casper.js

oauth.js

/*
 * oauth.js - Obtain oauth_token from Launchpad.net using Casper.js
 * Copyright (c) 2013, Ping-Hsun (penk) Chen <penk.chen@canonical.com>
 * 
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 * 
 *  Usage: casperjs oauth.js <OTP>
 */

var casper = require('casper').create({
    waitTimeout: 50000,
    verbose: true,
    logLevel: "debug",
}),
credentials = { 
    email: 'YOUR_LAUNCHPAD_EMAIL', 
    password: 'YOUR_LAUNCHPAD_PASSWORD', 
}; 

casper.start();

casper.then(function() {
    this.open('https://launchpad.net/+request-token', {
        method: 'post',
        data: {
        "oauth_consumer_key": "oauthjs", 
        "oauth_signature_method": "PLAINTEXT", 
        "oauth_signature": "&"
        }
    });
});

casper.then(function() {
    var objs = this.getPageContent().split('&');
    for (var i = 0; i < objs.length; i++) {
        var tmp = objs[i].split('=');
        if (tmp[0] == 'oauth_token')
            credentials.oauth_token = tmp[1];
        if (tmp[0] == 'oauth_token_secret')
            credentials.oauth_token_secret = tmp[1];
    }
});

casper.then(function() {
    casper.thenOpen("https://launchpad.net/+authorize-token?oauth_token="+credentials.oauth_token, function() {
        this.fill('form#login-form', {
            'email': credentials.email,
            'password': credentials.password,
        }, true); 
    });
});

casper.waitForUrl(/two_factor_auth/, function() {
    casper.fill('form#login-form', {
        'oath_token': casper.cli.args[0]
    }, true);
    casper.waitForSelector('button[name$="yes"]', function() {                       
        casper.thenClick('button[name$="yes"]');
    });
    casper.waitForSelector('input[name$="field.actions.READ_PRIVATE"]', function(){
        casper.thenClick('input[name$="field.actions.READ_PRIVATE"]');
    });
});

casper.then(function(){
    casper.echo(casper.getPageContent(), 'INFO');
    casper.thenOpen('https://launchpad.net/+access-token', {
        method: 'post',
        data: {
            "oauth_token": credentials.oauth_token,
            "oauth_consumer_key": "oauthjs", 
            "oauth_signature_method": "PLAINTEXT", 
            "oauth_signature": '&'+credentials.oauth_token_secret
        }
    });
});

casper.then(function(){
    var objs = casper.getPageContent().split('&');
    for (var i = 0; i < objs.length; i++) {
            var tmp = objs[i].split('=');
            if (tmp[0] == 'oauth_token')
                credentials.oauth_token = tmp[1];
            if (tmp[0] == 'oauth_token_secret')
                credentials.oauth_token_secret = tmp[1];
        }
    casper.echo('credentials: ', 'INFO');
    require('utils').dump(credentials);
});

casper.run(function() {
    this.exit();
});

test_oauth.js

// Usage: casperjs test_oauth.js <URL> 

var casper = require('casper').create({
    waitTimeout: 50000,
    verbose: true,
    logLevel: "debug",
}),
settings = { 
    consumer_key: 'oauthjs',
    oauth_token: 'YOUR_OAUTH_TOKEN',
    oauth_signature: 'YOUR_OAUTH_SIGNATURE', 
};

casper.start();

casper.then(function() {
    casper.open(casper.cli.args[0], {
        headers: {
            'Host': 'api.launchpad.net',
            'Accept': 'application/json',
            'Authorization': 'OAuth realm="https://api.launchpad.net/",'+
                'oauth_consumer_key="'+settings.consumer_key+'",'+
                'oauth_token="'+settings.oauth_token+'",'+
                'oauth_signature_method="PLAINTEXT",'+
                'oauth_signature="&'+settings.oauth_signature + '",'+
                'oauth_timestamp="'+ (new Date / 1000) + '",'+
                'oauth_nonce="'+Math.floor(Math.random() * 1000000000)+'",'+
                'oauth_version="1.0"'
        }
    });
});

casper.then(function(){
    casper.echo(casper.getPageContent(), 'INFO');
});
casper.run(function() {
    this.exit();
});