Created
August 31, 2013 16:18
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FormidableGridFS Handler
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var IncomingForm = require('formidable'); | |
var util = require('util'); | |
var EventEmitter = require('events').EventEmitter; | |
var GridStore = require('mongodb').GridStore; | |
var pauseStream = require('pause-stream'); | |
var ObjectID = require('mongodb').ObjectID; | |
function IncomingFormGridFS(opts) { | |
if(!(this instanceof IncomingFormGridFS)) return new IncomingFormGridFS(opts); | |
if(!opts.mongodbConnection) throw "Please provide mongodbConnection option!"; | |
EventEmitter.call(this); | |
this.mongodbConnection = opts.mongodbConnection; | |
this.error = null; | |
this.ended = false; | |
this.maxFields = opts.maxFields || 1000; | |
this.maxFieldsSize = opts.maxFieldsSize || 2 * 1024 * 1024; | |
this.keepExtensions = opts.keepExtensions || false; | |
this.uploadDir = opts.uploadDir; | |
this.encoding = opts.encoding || 'utf-8'; | |
this.headers = null; | |
this.type = null; | |
this.hash = false; | |
this.bytesReceived = null; | |
this.bytesExpected = null; | |
this._parser = null; | |
this._flushing = 0; | |
this._fieldsSize = 0; | |
this.openedFiles = []; | |
return this; | |
} | |
util.inherits(IncomingFormGridFS, IncomingForm); | |
IncomingFormGridFS.prototype.handlePart = function(part) { | |
var self=this; | |
if(!part.filename) return self.handlePart(part); | |
var pStream = pauseStream(); | |
part.pipe(pStream.pause()); | |
var fileMeta = { | |
name: part.filename, | |
path: 'void', // TODO | |
type: part.mime | |
}; | |
self.openedFiles.push(fileMeta); | |
self.emit('fileBegin', part.name, fileMeta); | |
new GridStore(self.mongodbConnection, new ObjectID(), fileMeta.name , 'w', { | |
metadata: { | |
filename: fileMeta.name | |
}, | |
content_type: part.mime | |
}).open(function(err, gridFile) { | |
self._flushing++; | |
pStream.on('data', function(buffer) { | |
pStream.pause(); | |
gridFile.write(buffer, function(err) { | |
if(err) console.error(err); | |
pStream.resume(); | |
}); | |
}); | |
pStream.on('end', function() { | |
gridFile.close(function(err, fileData) { | |
fileMeta.hash = fileData.md5; | |
fileMeta.length = fileData.length; | |
fileMeta._id = fileData._id; | |
fileMeta.uploadDate = fileData.uploadDate; | |
self._flushing--; | |
self.emit('file', part.name, fileMeta); | |
self._maybeEnd(); | |
}); | |
}); | |
pStream.resume(); | |
}); | |
}; | |
IncomingFormGridFS.prototype._error = function(err) { | |
if(this.error || this.ended) { | |
return; | |
} | |
console.log('gridfs incfrm _ERROR '); | |
this.error = err; | |
this.pause(); | |
this.emit('error', err); | |
// no need to delete files, GridFS kicks it when we dont close the stream probably | |
}; | |
module.exports = IncomingFormGridFS; |
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