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multipart.js
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multipart.js
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/*!
* Connect - multipart
* Copyright(c) 2010 Sencha Inc.
* Copyright(c) 2011 TJ Holowaychuk
* MIT Licensed
*/
/**
* Module dependencies.
*/
var multiparty = require('multiparty')
, _limit = require('./limit')
, utils = require('../utils')
, qs = require('qs');
/**
* Multipart:
*
* Status: Deprecated. The multipart parser will be removed in Connect 3.0.
* Please use one of the following parsers/middleware directly:
*
* - [formidable](https://github.com/felixge/node-formidable)
* - [connect-multiparty](https://github.com/superjoe30/connect-multiparty) or [multiparty]
* - [connect-busboy](https://github.com/mscdex/connect-busboy) or [busboy](https://github.com/mscdex/busboy)
*
* Parse multipart/form-data request bodies,
* providing the parsed object as `req.body`
* and `req.files`.
*
* Configuration:
*
* The options passed are merged with [multiparty](https://github.com/superjoe30/node-multiparty)'s
* `Form` object, allowing you to configure the upload directory,
* size limits, etc. For example if you wish to change the upload dir do the following.
*
* app.use(connect.multipart({ uploadDir: path }));
*
* Options:
*
* - `limit` byte limit defaulting to [100mb]
* - `defer` defers processing and exposes the multiparty form object as `req.form`.
* `next()` is called without waiting for the form's "end" event.
* This option is useful if you need to bind to the "progress" or "part" events, for example.
*
* Temporary Files:
*
* By default temporary files are used, stored in `os.tmpDir()`. These
* are not automatically garbage collected, you are in charge of moving them
* or deleting them. When `defer` is not used and these files are created you
* may refernce them via the `req.files` object.
*
* req.files.images.forEach(function(file){
* console.log(' uploaded : %s %skb : %s', file.originalFilename, file.size / 1024 | 0, file.path);
* });
*
* It is highly recommended to monitor and clean up tempfiles in any production
* environment, you may use tools like [reap](https://github.com/visionmedia/reap)
* to do so.
*
* Streaming:
*
* When `defer` is used files are _not_ streamed to tmpfiles, you may
* access them via the "part" events and stream them accordingly:
*
* req.form.on('part', function(part){
* // transfer to s3 etc
* console.log('upload %s %s', part.name, part.filename);
* var out = fs.createWriteStream('/tmp/' + part.filename);
* part.pipe(out);
* });
*
* req.form.on('close', function(){
* res.end('uploaded!');
* });
*
* @param {Object} options
* @return {Function}
* @api public
*/
exports = module.exports = function(options){
options = options || {};
if (process.env.NODE_ENV !== 'test') {
console.warn('connect.multipart() will be removed in connect 3.0');
console.warn('visit https://github.com/senchalabs/connect/wiki/Connect-3.0 for alternatives');
}
var limit = _limit(options.limit || '100mb');
return function multipart(req, res, next) {
if (req._body) return next();
req.body = req.body || {};
req.files = req.files || {};
if (!utils.hasBody(req)) return next();
// ignore GET
if ('GET' == req.method || 'HEAD' == req.method) return next();
// check Content-Type
if ('multipart/form-data' != utils.mime(req)) return next();
// flag as parsed
req._body = true;
// parse
limit(req, res, function(err){
if (err) return next(err);
var form = new multiparty.Form(options)
, data = {}
, files = {}
, done;
Object.keys(options).forEach(function(key){
form[key] = options[key];
});
function ondata(name, val, data){
if (Array.isArray(data[name])) {
data[name].push(val);
} else if (data[name]) {
data[name] = [data[name], val];
} else {
data[name] = val;
}
}
form.on('field', function(name, val){
ondata(name, val, data);
});
if (!options.defer) {
form.on('file', function(name, val){
val.name = val.originalFilename;
val.type = val.headers['content-type'] || null;
ondata(name, val, files);
});
}
form.on('error', function(err){
if (!options.defer) {
err.status = 400;
next(err);
}
done = true;
});
form.on('close', function(){
if (done) return;
try {
req.body = qs.parse(data);
req.files = qs.parse(files);
} catch (err) {
form.emit('error', err);
return;
}
if (!options.defer) next();
});
form.parse(req);
if (options.defer) {
req.form = form;
next();
}
});
}
};