pixivへのログインから画像ダウンロード #Node.js #HttpClient

gistfile1.js

var HttpClient = require('../lib/httpClient.js').HttpClient;

var client = new HttpClient ();

var body = require('querystring').stringify({
        mode : 'login', pixiv_id : 'your pixiv id', pass : 'your pixiv pass'
});

var pixivHome  = 'http://www.pixiv.net';
var loginPhp   = [ pixivHome, '/login.php' ].join('');
var illust_top = [ pixivHome, '/member_illust.php?mode=medium&illust_id=22089162' ].join('');

client.request('POST', loginPhp, { 'connection' : 'keep-alive' }, body, function (res, req) {
        client.request('GET', illust_top, function (res, req) {
                res.setEncoding('utf-8');
                var data = '';
                res.on('data', function (chunk) { data += chunk; });
                res.on('end', function () {
                        data = data.replace(/\n/g, '');
                        var pattern = /<a href="(member_illust\.php\?mode=[^"]+?)"[^>]+?><img src="([^"]+?)".+?title="([^"]+?)"/;
                        var result  = pattern.exec(data);
                        //var contentsURL = unescapeHTML([ pixivHome, result[1] ].join('/'));
                        var imgSrc  = unescapeHTML(result[2]);
                        //var title   = result[3];

                        client.request('GET', imgSrc, function (res, req) {
                                var target      = require('path').basename(imgSrc);
                                var writeStream = require('fs').createWriteStream(target);
                                writeStream.on('error', function (exception) {
                                        throw exception;
                                });
                                writeStream.on('close', function () {
                                        console.log('writeStream say "close"');
                                });

                                res.on('data', function (chunk) {
                                        writeStream.write(chunk);
                                });
                                res.on('end', function () {
                                        writeStream.end();
                                        console.log('response say "end"');
                                });
                        });
                });
        });
});


function unescapeHTML (str) {
    var chas = [
        ['&amp;',  '&'],
        ['&gt;',   '>'],
        ['&lt;',   '<'],
        ['&quot;', '"']
    ];
    chas.forEach(function (cha) {
        var c = cha[0];
        str = str.replace(new RegExp(cha[0], "g"), cha[1]);
    });
    return str;
}