Reputation: 2402
I have a file stream that I want to pass in a method named transformRead(), this one accepts a readStream and a writeStream, but I don't know how to create the temporary write stream... do I have to use a file ? I just want a kind of pipe() from rs to ws, then ws is gzipped and sent to response.
// Get file stream
var rs = store.getReadStream(fileId);
var ws = ?????;
// Execute transformation
store.transformRead(rs, ws, fileId);
var accept = req.headers['accept-encoding'] || '';
// Compress data if supported by the client
if (accept.match(/\bdeflate\b/)) {
res.writeHead(200, {
'Content-Encoding': 'deflate',
'Content-Type': file.type
});
ws.pipe(zlib.createDeflate()).pipe(res);
} else if (accept.match(/\bgzip\b/)) {
res.writeHead(200, {
'Content-Encoding': 'gzip',
'Content-Type': file.type
});
ws.pipe(zlib.createGzip()).pipe(res);
} else {
res.writeHead(200, {});
ws.pipe(res);
}
Upvotes: 8
Views: 2589
Reputation: 2402
Finally, someone told me about using stream.PassThrough();
So the simplest and "native" solution is :
var ws = new stream.PassThrough();
Upvotes: 5