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diff --git a/fastify-busboy/README.md b/fastify-busboy/README.md new file mode 100644 index 0000000..c74e618 --- /dev/null +++ b/fastify-busboy/README.md @@ -0,0 +1,271 @@ +# busboy + +<div align="center"> + +[](https://github.com/fastify/busboy/actions) +[](https://coveralls.io/r/fastify/busboy?branch=master) +[](https://standardjs.com/) +[](https://github.com/nodejs/security-wg/blob/HEAD/processes/responsible_disclosure_template.md) + +</div> + +<div align="center"> + +[](https://www.npmjs.com/package/@fastify/busboy) +[](https://www.npmjs.com/package/@fastify/busboy) + +</div> + +Description +=========== + +A Node.js module for parsing incoming HTML form data. + +This is an officially supported fork by [fastify](https://github.com/fastify/) organization of the amazing library [originally created](https://github.com/mscdex/busboy) by Brian White, +aimed at addressing long-standing issues with it. + +Benchmark (Mean time for 500 Kb payload, 2000 cycles, 1000 cycle warmup): + +| Library | Version | Mean time in nanoseconds (less is better) | +|-----------------------|---------|-------------------------------------------| +| busboy | 0.3.1 | `340114` | +| @fastify/busboy | 1.0.0 | `270984` | + +[Changelog](https://github.com/fastify/busboy/blob/master/CHANGELOG.md) since busboy 0.31. + +Requirements +============ + +* [Node.js](http://nodejs.org/) 10+ + + +Install +======= + + npm i @fastify/busboy + + +Examples +======== + +* Parsing (multipart) with default options: + +```javascript +const http = require('node:http'); +const { inspect } = require('node:util'); +const Busboy = require('busboy'); + +http.createServer((req, res) => { + if (req.method === 'POST') { + const busboy = new Busboy({ headers: req.headers }); + busboy.on('file', (fieldname, file, filename, encoding, mimetype) => { + console.log(`File [${fieldname}]: filename: ${filename}, encoding: ${encoding}, mimetype: ${mimetype}`); + file.on('data', data => { + console.log(`File [${fieldname}] got ${data.length} bytes`); + }); + file.on('end', () => { + console.log(`File [${fieldname}] Finished`); + }); + }); + busboy.on('field', (fieldname, val, fieldnameTruncated, valTruncated, encoding, mimetype) => { + console.log(`Field [${fieldname}]: value: ${inspect(val)}`); + }); + busboy.on('finish', () => { + console.log('Done parsing form!'); + res.writeHead(303, { Connection: 'close', Location: '/' }); + res.end(); + }); + req.pipe(busboy); + } else if (req.method === 'GET') { + res.writeHead(200, { Connection: 'close' }); + res.end(`<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>`); + } +}).listen(8000, () => { + console.log('Listening for requests'); +}); + +// Example output, using http://nodejs.org/images/ryan-speaker.jpg as the file: +// +// Listening for requests +// File [filefield]: filename: ryan-speaker.jpg, encoding: binary +// File [filefield] got 11971 bytes +// Field [textfield]: value: 'testing! :-)' +// File [filefield] Finished +// Done parsing form! +``` + +* Save all incoming files to disk: + +```javascript +const http = require('node:http'); +const path = require('node:path'); +const os = require('node:os'); +const fs = require('node:fs'); + +const Busboy = require('busboy'); + +http.createServer(function(req, res) { + if (req.method === 'POST') { + const busboy = new Busboy({ headers: req.headers }); + busboy.on('file', function(fieldname, file, filename, encoding, mimetype) { + var saveTo = path.join(os.tmpdir(), path.basename(fieldname)); + file.pipe(fs.createWriteStream(saveTo)); + }); + busboy.on('finish', function() { + res.writeHead(200, { 'Connection': 'close' }); + res.end("That's all folks!"); + }); + return req.pipe(busboy); + } + res.writeHead(404); + res.end(); +}).listen(8000, function() { + console.log('Listening for requests'); +}); +``` + +* Parsing (urlencoded) with default options: + +```javascript +const http = require('node:http'); +const { inspect } = require('node:util'); + +const Busboy = require('busboy'); + +http.createServer(function(req, res) { + if (req.method === 'POST') { + const busboy = new Busboy({ headers: req.headers }); + busboy.on('file', function(fieldname, file, filename, encoding, mimetype) { + console.log('File [' + fieldname + ']: filename: ' + filename); + file.on('data', function(data) { + console.log('File [' + fieldname + '] got ' + data.length + ' bytes'); + }); + file.on('end', function() { + console.log('File [' + fieldname + '] Finished'); + }); + }); + busboy.on('field', function(fieldname, val, fieldnameTruncated, valTruncated) { + console.log('Field [' + fieldname + ']: value: ' + inspect(val)); + }); + busboy.on('finish', function() { + console.log('Done parsing form!'); + res.writeHead(303, { Connection: 'close', Location: '/' }); + res.end(); + }); + req.pipe(busboy); + } else if (req.method === 'GET') { + res.writeHead(200, { Connection: 'close' }); + res.end('<html><head></head><body>\ + <form method="POST">\ + <input type="text" name="textfield"><br />\ + <select name="selectfield">\ + <option value="1">1</option>\ + <option value="10">10</option>\ + <option value="100">100</option>\ + <option value="9001">9001</option>\ + </select><br />\ + <input type="checkbox" name="checkfield">Node.js rules!<br />\ + <input type="submit">\ + </form>\ + </body></html>'); + } +}).listen(8000, function() { + console.log('Listening for requests'); +}); + +// Example output: +// +// Listening for requests +// Field [textfield]: value: 'testing! :-)' +// Field [selectfield]: value: '9001' +// Field [checkfield]: value: 'on' +// Done parsing form! +``` + + +API +=== + +_Busboy_ is a _Writable_ stream + +Busboy (special) events +----------------------- + +* **file**(< _string_ >fieldname, < _ReadableStream_ >stream, < _string_ >filename, < _string_ >transferEncoding, < _string_ >mimeType) - Emitted for each new file form field found. `transferEncoding` contains the 'Content-Transfer-Encoding' value for the file stream. `mimeType` contains the 'Content-Type' value for the file stream. + * Note: if you listen for this event, you should always handle the `stream` no matter if you care about the file contents or not (e.g. you can simply just do `stream.resume();` if you want to discard the contents), otherwise the 'finish' event will never fire on the Busboy instance. However, if you don't care about **any** incoming files, you can simply not listen for the 'file' event at all and any/all files will be automatically and safely discarded (these discarded files do still count towards `files` and `parts` limits). + * If a configured file size limit was reached, `stream` will both have a boolean property `truncated` (best checked at the end of the stream) and emit a 'limit' event to notify you when this happens. + * The property `bytesRead` informs about the number of bytes that have been read so far. + +* **field**(< _string_ >fieldname, < _string_ >value, < _boolean_ >fieldnameTruncated, < _boolean_ >valueTruncated, < _string_ >transferEncoding, < _string_ >mimeType) - Emitted for each new non-file field found. + +* **partsLimit**() - Emitted when specified `parts` limit has been reached. No more 'file' or 'field' events will be emitted. + +* **filesLimit**() - Emitted when specified `files` limit has been reached. No more 'file' events will be emitted. + +* **fieldsLimit**() - Emitted when specified `fields` limit has been reached. No more 'field' events will be emitted. + + +Busboy methods +-------------- + +* **(constructor)**(< _object_ >config) - Creates and returns a new Busboy instance. + + * The constructor takes the following valid `config` settings: + + * **headers** - _object_ - These are the HTTP headers of the incoming request, which are used by individual parsers. + + * **autoDestroy** - _boolean_ - Whether this stream should automatically call .destroy() on itself after ending. (Default: false). + + * **highWaterMark** - _integer_ - highWaterMark to use for this Busboy instance (Default: WritableStream default). + + * **fileHwm** - _integer_ - highWaterMark to use for file streams (Default: ReadableStream default). + + * **defCharset** - _string_ - Default character set to use when one isn't defined (Default: 'utf8'). + + * **preservePath** - _boolean_ - If paths in the multipart 'filename' field shall be preserved. (Default: false). + + * **isPartAFile** - __function__ - Use this function to override the default file detection functionality. It has following parameters: + + * fieldName - __string__ The name of the field. + + * contentType - __string__ The content-type of the part, e.g. `text/plain`, `image/jpeg`, `application/octet-stream` + + * fileName - __string__ The name of a file supplied by the part. + + (Default: `(fieldName, contentType, fileName) => (contentType === 'application/octet-stream' || fileName !== undefined)`) + + * **limits** - _object_ - Various limits on incoming data. Valid properties are: + + * **fieldNameSize** - _integer_ - Max field name size (in bytes) (Default: 100 bytes). + + * **fieldSize** - _integer_ - Max field value size (in bytes) (Default: 1 MiB, which is 1024 x 1024 bytes). + + * **fields** - _integer_ - Max number of non-file fields (Default: Infinity). + + * **fileSize** - _integer_ - For multipart forms, the max file size (in bytes) (Default: Infinity). + + * **files** - _integer_ - For multipart forms, the max number of file fields (Default: Infinity). + + * **parts** - _integer_ - For multipart forms, the max number of parts (fields + files) (Default: Infinity). + + * **headerPairs** - _integer_ - For multipart forms, the max number of header key=>value pairs to parse **Default:** 2000 + + * **headerSize** - _integer_ - For multipart forms, the max size of a multipart header **Default:** 81920. + + * The constructor can throw errors: + + * **Busboy expected an options-Object.** - Busboy expected an Object as first parameters. + + * **Busboy expected an options-Object with headers-attribute.** - The first parameter is lacking of a headers-attribute. + + * **Limit $limit is not a valid number** - Busboy expected the desired limit to be of type number. Busboy throws this Error to prevent a potential security issue by falling silently back to the Busboy-defaults. Potential source for this Error can be the direct use of environment variables without transforming them to the type number. + + * **Unsupported Content-Type.** - The `Content-Type` isn't one Busboy can parse. + + * **Missing Content-Type-header.** - The provided headers don't include `Content-Type` at all. |