mirror of
https://github.com/musix-org/musix-oss
synced 2024-12-23 16:13:18 +00:00
123 lines
3.6 KiB
Markdown
123 lines
3.6 KiB
Markdown
|
|
Description
|
|
===========
|
|
|
|
A very fast streaming multipart parser for node.js.
|
|
|
|
Benchmarks can be found [here](https://github.com/mscdex/dicer/wiki/Benchmarks).
|
|
|
|
|
|
Requirements
|
|
============
|
|
|
|
* [node.js](http://nodejs.org/) -- v4.5.0 or newer
|
|
|
|
|
|
Install
|
|
============
|
|
|
|
npm install dicer
|
|
|
|
|
|
Examples
|
|
========
|
|
|
|
* Parse an HTTP form upload
|
|
|
|
```javascript
|
|
var inspect = require('util').inspect,
|
|
http = require('http');
|
|
|
|
var Dicer = require('dicer');
|
|
|
|
// quick and dirty way to parse multipart boundary
|
|
var RE_BOUNDARY = /^multipart\/.+?(?:; boundary=(?:(?:"(.+)")|(?:([^\s]+))))$/i,
|
|
HTML = Buffer.from('<html><head></head><body>\
|
|
<form method="POST" enctype="multipart/form-data">\
|
|
<input type="text" name="textfield"><br />\
|
|
<input type="file" name="filefield"><br />\
|
|
<input type="submit">\
|
|
</form>\
|
|
</body></html>'),
|
|
PORT = 8080;
|
|
|
|
http.createServer(function(req, res) {
|
|
var m;
|
|
if (req.method === 'POST'
|
|
&& req.headers['content-type']
|
|
&& (m = RE_BOUNDARY.exec(req.headers['content-type']))) {
|
|
var d = new Dicer({ boundary: m[1] || m[2] });
|
|
|
|
d.on('part', function(p) {
|
|
console.log('New part!');
|
|
p.on('header', function(header) {
|
|
for (var h in header) {
|
|
console.log('Part header: k: ' + inspect(h)
|
|
+ ', v: ' + inspect(header[h]));
|
|
}
|
|
});
|
|
p.on('data', function(data) {
|
|
console.log('Part data: ' + inspect(data.toString()));
|
|
});
|
|
p.on('end', function() {
|
|
console.log('End of part\n');
|
|
});
|
|
});
|
|
d.on('finish', function() {
|
|
console.log('End of parts');
|
|
res.writeHead(200);
|
|
res.end('Form submission successful!');
|
|
});
|
|
req.pipe(d);
|
|
} else if (req.method === 'GET' && req.url === '/') {
|
|
res.writeHead(200);
|
|
res.end(HTML);
|
|
} else {
|
|
res.writeHead(404);
|
|
res.end();
|
|
}
|
|
}).listen(PORT, function() {
|
|
console.log('Listening for requests on port ' + PORT);
|
|
});
|
|
```
|
|
|
|
|
|
API
|
|
===
|
|
|
|
_Dicer_ is a _WritableStream_
|
|
|
|
Dicer (special) events
|
|
----------------------
|
|
|
|
* **finish**() - Emitted when all parts have been parsed and the Dicer instance has been ended.
|
|
|
|
* **part**(< _PartStream_ >stream) - Emitted when a new part has been found.
|
|
|
|
* **preamble**(< _PartStream_ >stream) - Emitted for preamble if you should happen to need it (can usually be ignored).
|
|
|
|
* **trailer**(< _Buffer_ >data) - Emitted when trailing data was found after the terminating boundary (as with the preamble, this can usually be ignored too).
|
|
|
|
|
|
Dicer methods
|
|
-------------
|
|
|
|
* **(constructor)**(< _object_ >config) - Creates and returns a new Dicer instance with the following valid `config` settings:
|
|
|
|
* **boundary** - _string_ - This is the boundary used to detect the beginning of a new part.
|
|
|
|
* **headerFirst** - _boolean_ - If true, preamble header parsing will be performed first.
|
|
|
|
* **maxHeaderPairs** - _integer_ - The maximum number of header key=>value pairs to parse **Default:** 2000 (same as node's http).
|
|
|
|
* **setBoundary**(< _string_ >boundary) - _(void)_ - Sets the boundary to use for parsing and performs some initialization needed for parsing. You should only need to use this if you set `headerFirst` to true in the constructor and are parsing the boundary from the preamble header.
|
|
|
|
|
|
|
|
_PartStream_ is a _ReadableStream_
|
|
|
|
PartStream (special) events
|
|
---------------------------
|
|
|
|
* **header**(< _object_ >header) - An object containing the header for this particular part. Each property value is an _array_ of one or more string values.
|