lightappbuilder/index.js

Baidu AppBuilder api implemention

module.exports = function (req, res, next) {
    req.lightapp = {
        __proto__: exports,
        req: req,
        _referer: 'http://' + req.headers.host + req.url
    };
    next();
};

var lightapp = exports;

lightapp.file = {
    getQuota: function (cb) {
        this.request('GET', '/api/file.quota', cb).end();
    },
    download: function (path, cb, range) {
        this.request('GET', '/api/file' + path, cb, null, range && {
            Range: 'bytes=' + range[0] + '-' + range[1]
        }, true).end();
    },
    upload: function (path, data, cb, overwrite) {
        this.request('PUT', '/api/file' + path + (overwrite ? '?overwrite=true' : ''), cb, {
            'Content-Length': data.length
        }).end(data);
    },
    mkdir: function (path, cb) {
        this.request('PUT', '/api/file' + path + '?dir=true', cb, {
            'Content-Length': 0
        }).end();
    },
    pipe: function (path, overwrite) {
        var req = this.req, res = req.response;
        req.pipe(this.request(req.method, '/api/file' + path + (overwrite ? '?overwrite=true' : ''), function (err, tres) {
            if (err) {
                res.statusCode = 500;
                res.end(err.message);
            } else {
                res.writeHead(tres.statusCode, tres.headers);
                tres.pipe(res);
            }
        }, req.headers, true));
    }
};

'query,get,keys,setString,set,unset,remove,clear,sync,addSitemap,removeSitemap,publish'.split(',')
    .forEach(function (name) {
        lightapp[name] = function () {
            var args = Array.prototype.slice.call(arguments), cb = args.pop();
            if (typeof cb !== 'function') {
                args.push(cb);
                cb = console.log.bind(console);
            }
            // assert(typeof cb === 'function');
            var data = new Buffer(JSON.stringify({
                method: name,
                params: args
            }));
            this.request('POST', '/api', cb, {
                'Content-Length': data.length
            }).end(data);
        };
    });

lightapp.request = function (method, url, cb, headers, raw) {
    var HOST = 'lightapp.duapp.com';
    var headers = headers || {};

    headers.Referer = this._referer;
    headers.Host = HOST;

    return require('http').request({
        method: method,
        host: HOST,
        path: url,
        headers: headers
    }, function (tres) {
        if (raw) {
            cb(null, tres);
        } else {
            var arr = [];
            tres.on('data', arr.push.bind(arr)).on('end', function () {
                cb(null, JSON.parse(Buffer.concat(arr)));
            });
        }
    }).on('error', cb);
}