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@dariocravero
Created October 20, 2012 05:25
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Save files in Meteor

Create a Meteor app and put the client_/server_ files in a client/server directories. Also, create a public dir to save the uploaded files.

Template.example.events({
'change input': function(ev) {
_.each(ev.srcElement.files, function(file) {
Meteor.saveFile(file, file.name);
});
}
});
<template name="example">
<input type=file />
</template>
/**
* @blob (https://developer.mozilla.org/en-US/docs/DOM/Blob)
* @name the file's name
* @type the file's type: binary, text (https://developer.mozilla.org/en-US/docs/DOM/FileReader#Methods)
*
* TODO Support other encodings: https://developer.mozilla.org/en-US/docs/DOM/FileReader#Methods
* ArrayBuffer / DataURL (base64)
*/
Meteor.saveFile = function(blob, name, path, type, callback) {
var fileReader = new FileReader(),
method, encoding = 'binary', type = type || 'binary';
switch (type) {
case 'text':
// TODO Is this needed? If we're uploading content from file, yes, but if it's from an input/textarea I think not...
method = 'readAsText';
encoding = 'utf8';
break;
case 'binary':
method = 'readAsBinaryString';
encoding = 'binary';
break;
default:
method = 'readAsBinaryString';
encoding = 'binary';
break;
}
fileReader.onload = function(file) {
Meteor.call('saveFile', file.srcElement.result, name, path, encoding, callback);
}
fileReader[method](blob);
}
/**
* TODO support other encodings:
* http://stackoverflow.com/questions/7329128/how-to-write-binary-data-to-a-file-using-node-js
*/
Meteor.methods({
saveFile: function(blob, name, path, encoding) {
var path = cleanPath(path), fs = __meteor_bootstrap__.require('fs'),
name = cleanName(name || 'file'), encoding = encoding || 'binary',
chroot = Meteor.chroot || 'public';
// Clean up the path. Remove any initial and final '/' -we prefix them-,
// any sort of attempt to go to the parent directory '..' and any empty directories in
// between '/////' - which may happen after removing '..'
path = chroot + (path ? '/' + path + '/' : '/');
// TODO Add file existance checks, etc...
fs.writeFile(path + name, blob, encoding, function(err) {
if (err) {
throw (new Meteor.Error(500, 'Failed to save file.', err));
} else {
console.log('The file ' + name + ' (' + encoding + ') was saved to ' + path);
}
});
function cleanPath(str) {
if (str) {
return str.replace(/\.\./g,'').replace(/\/+/g,'').
replace(/^\/+/,'').replace(/\/+$/,'');
}
}
function cleanName(str) {
return str.replace(/\.\./g,'').replace(/\//g,'');
}
}
});
@saravanan4514
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Need to make the following changes to have this working in meteor 1.3

  1. import fs from 'fs'; (instead of fs = meteor_bootstrap.require('fs'))
  2. Change chroot to chroot = '../../../../../public';
  3. In helper function change the ev.srcElement.files to ev.currentTarget.files

Works like a charm after that. Thanks for the tutorial.

@varunajmera0
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code is not working. :(

@varunajmera0
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image
i am getting error that meteor_bootstrap.require('fs') is not function.

@varunajmera0
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# Thanks alot man #dariocravero

Working.
Without any package.

Thanks

@varunajmera0
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can anyone tell how to create persistence storage in development mode for meteor. Whenever server starts either remove data or give this error
Error: EBUSY: resource busy or locked, rmdir 'C:\Users\admins\Desktop\tripsy\dummy.meteor\local\build\programs\server'
at Error (native)

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