On Sun, Sep 23, 2012 at 6:52 PM, Andris Reinman
<[email protected]> wrote:
> What would be the best way to detect a file has been written to disk? Once I
> have passed all the data to a fs.WriteStream, the data is at first buffered
> by node and written to the disk asynchronously. There is no "end" or "close"
> event to listen to (or at least these don't trigger on my system (node
> v0.8.9)) when all bytes are actually written to the disk.
>
> The best I have come up to is to listen to the "drain" event and then
> compare writablestream.bytesWritten and the length of the data I sent to the
> stream.
>
> var len = 0;
> myReadStream.on("data", function(chunk){
>     myWriteStream.write(chunk);
>     len += chunk.length;
> });
>
> myWriteStream.on("drain", function(){
>     if(myWriteStream.bytesWritten == len){
>         console.log("All bytes written to disk");
>     }
> });
>
> But this doesn't seem very future proof, what if the conditions for the
> 'drain' event with file write change one day? Is there a better way for
> this?

Doesn't myReadStream.pipe(myWriteStream) work?

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