The jpegtran utility as a readable/writable stream
npm install jpegtran
The jpegtran command line utility as a readable/writable stream.
If you don't have a jpegtran binary in your PATH, node-jpegtran
will try to use one of the binaries provided by
package.
The constructor optionally takes an array of command line options for
the jpegtran binary:
``javascript
var JpegTran = require('jpegtran'),
myJpegTranslator = new JpegTran(['-rotate', 90, '-progressive']);
sourceStream.pipe(myJpegTranslator).pipe(destinationStream);
`
JpegTran as a web service (sends back a horizontally flipped grayscale
version of the request body):
`javascript
var JpegTran = require('jpegtran'),
http = require('http');
http
.createServer(function (req, res) {
if (req.headers['content-type'] === 'image/jpeg') {
res.writeHead(200, { 'Content-Type': 'image/jpeg' });
req.pipe(new JpegTran(['-grayscale', '-flip', 'horizontal'])).pipe(res);
} else {
res.writeHead(400);
res.end('Feed me a JPEG!');
}
})
.listen(1337);
`
Make sure you have node.js and npm installed, then run:
`
npm install jpegtran
3-clause BSD license -- see the LICENSE` file for details.