FilesCollection Http method for React-Native

gistfile1.txt

Install `$ meteor add meteorhacks:picker` first

```
import {Meteor} from 'meteor/meteor';
import {Accounts} from 'meteor/accounts-base';
import {FilesCollection} from 'meteor/ostrio:files';

export const MyFiles = new FilesCollection({
    collectionName: 'MyFiles',
    allowClientCode: true,
    downloadRoute: '/download',
    // storagePath: 'assets/images/avatars/',
});

if (Meteor.isServer) {
    const _multer = require('multer');
    const _fs = require('fs');
    const _multerInstanceConfig = {dest: '/tmp'}; // Temp dir for multer
    const _multerInstance = _multer(_multerInstanceConfig);

    Picker.middleware(_multerInstance.single('photo'));

    Picker.route('/api/v1/upload', function (params, req, res, next) {
        if (!!req.file && !!params.query.userId) {
            const user = Meteor.users.findOne({'_id': params.query.userId});
            if (user) {
                _fs.stat(req.file.path, function (_statError, _statData) {
                    const _addFileMeta = {
                        fileName: req.file.originalname,
                        type: req.file.mimetype,
                        size: req.file.size,
                        meta: {
                            userId: user._id
                        }
                    };

                    _fs.readFile(req.file.path, function (_readError, _readData) {
                        if (_readError) {
                            console.log(_readError);
                            res.writeHead(400, {"Content-Type": "application/json"});
                            var json = JSON.stringify(_readError);
                            res.end(json);
                        } else {
                            MyFiles.write(_readData, _addFileMeta, function (_uploadError, _uploadData) {
                                if (_uploadError) {
                                    console.log(_uploadError);
                                    res.writeHead(400, {"Content-Type": "application/json"});
                                    var json = JSON.stringify(_uploadError);
                                    res.end(json);
                                } else {
                                    console.log('upload data=', _uploadData);
                                    _fs.unlink(req.file.path); // remove temp upload
                                    res.writeHead(200, {"Content-Type": "application/json"});
                                    var json = JSON.stringify(_uploadData);
                                    res.end(json);
                                }
                            });
                        }
                    });
                });
            }
            else {
                res.writeHead(400, {"Content-Type": "text/plain"});
                res.end('User not found');
            }
        }
        else {
            res.writeHead(400, {"Content-Type": "text/plain"});
            res.end('File not found');
        }
    });
}
```

Checkout this image for the request info: http://oi67.tinypic.com/25tgc60.jpg