I don't know what is wrong with your particular code. But take a look
at https://github.com/felixge/node-growing-file
On Friday, July 27, 2012 9:11:05 AM UTC-7, Adeel Qureshi wrote:
>
> I am reading a growing file and showing its contents in the browser ..
> here is my implementation for reading the file
>
> //start watching the file
> fs.watchFile(filename, {persistent:true,
> interval:1000}, function(curr, prev){
> if(prev.size > curr.size)
> callback(null);
> //open stream
> var stream = fs.createReadStream(filename,
> {start:prev.size, end:curr.size, encoding:'utf8'});
> stream.on('data', function(data){
> //emit new data
> socket.emit('log', fileId,
> data.split('\r\n'));
> });
> stream.on('error', function(err){
> if(err) throw err;
> });
> });
>
> this seems to work fine overall but for some strange reason it cant parse
> out some lines that are added to the file and the lines dont seem to be
> consistent .. e.g. the same line will be read fine if it shows up again but
> every once in a while it just reads the whole line as null characters and
> emits data as something like
>
> debug: websocket writing
> 5:::{"name":"log","args":["coi-prod_wom201207260log",["\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000"]]}
>
> any ideas whats going on here
>
> Thanks
> Adeel
>
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