Pipe doesn't write to new writeStream

Question

I try to copy a file with pipe but after code is run there is only an empty file. In the console is no error.

const writeStream = fs.createWriteStream( newLocation); // album1/fff28042018.jpg
writeStream.on('error', function(e){console.log(e)});

const readStream = fs.createReadStream(oldLocation); // imagesource/fff.jpg
readStream.on('error', function(e){console.log(e)});

readStream.pipe(writeStream);
writeStream.close();
readStream.close();

I expect that the image from imagesource/fff.jpg to the new file album1/fff28042018.jpg is copied. But in the end i have a new empty file album1/fff28042018.jpg

before the question comes up "Yes the source file exists".

Possible duplicate of [Fastest way to copy file in node.js](https://stackoverflow.com/questions/11293857/fastest-way-to-copy-file-in-node-js) — Charlie, Jun 06 '19 at 05:50

score 0 · Answer 1 · answered Jun 06 '19 at 05:50

0

Looks like you are closing the streams before the data transferring finishes. Usually, when the readable finishes piping, it emits end on the writable stream and the stream get closed automatically.

Here is the shortest as cited in this answer.

fs.createReadStream('test.log').pipe(fs.createWriteStream('newLog.log'));

answered Jun 06 '19 at 05:50

Charlie

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tried it doesn't work :-( . Can there be a permission error that doesn't result in an error in the log? – Daniel Richter Jun 06 '19 at 07:59
Update: on windows it works fine on arch linux not. – Daniel Richter Jun 06 '19 at 08:09
So, this means the problem is in your os - not the code. – Charlie Jun 06 '19 at 08:11

Pipe doesn't write to new writeStream

1 Answers1