CAUTION!!!! getFileStream syntax change to be able to check the existence of the file before!!!!

gridfs-uploader + fulltext extraction

Easily add new files to mongos gridfs. Special feature is to check for uniqueness while uploading the file. Returns an error with the file duplicate from the database.

var mongo = require('mongodb');
var Grid = require('gridfs-uploader');

var server = new mongo.Server('localhost', 27017);
var db = new mongo.Db('gridloader_test', server, {w:1});

var g =new Grid(mongo);
g.db = db;

// write a unique file to gridfs
g.putUniqueFile('/mypath/test.txt', 'text.txt', null, function(err, result) {
 console.log(result);
});


// read Stream from gridfs (provided by gridfs-stream)
var output = fs.createWriteStream(outputPath, {'flags': 'w'});
g.getFileStream(id, function(err, filestream) {
  filestream.pipe(output);
}

Text extraction of files

gridfs-uploader uses textract to automatically get texts from uploaded files and stores it as additional metadata in the files collection.

• PDF
• DOC
• DOCX
• XLS
• XLSX
• XLSB
• XLSM
• PPTX
• DXF
• PNG
• JPG
• GIF
• RTF
• application/javascript
• All text/* mime-types

To use this feature you should install the needed system libraries.

Install libraries under ubuntu

apt-get install catdoc poppler-utils tesseract-ocr unzip

Exif extraction for JPEG - files

Starting with version 0.6.0 every uploaded jpeg will be scanned for exif - data.

For example a result in the metadata of the files object can be

{ filename: 'test.jpg',
  content_type: 'image/jpeg',
  text: ' ',
  image:
   { Make: 'NIKON CORPORATION',
     Model: 'NIKON D3000',
     XResolution: 300,
     YResolution: 300,
     ResolutionUnit: 2,
     Software: 'Ver.1.00 ',
     ModifyDate: '2013:10:17 15:42:37',
     ExifOffset: 198,
     GPSInfo: 776 },
  ...

Read data with mongoose

var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/gridloader_test');
var schema = new mongoose.Schema({
    filename: String
},{safe: false, collection: 'fs.files'});
var model = mongoose.model('files', schema);
model.findById(id, function(err, docs) {
	console.log(docs);
}

Todo

• Some tests are missing ( check for CSV for example )
• Adding additional handler for file types.

Using unit test

Use "npm test" or the command "make test"