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[Python-ideas] socket.sendall() "counter" parameter

Antoine Pitrou solipsis at pitrou.net
Fri Apr 18 14:04:46 CEST 2014 
On Fri, 18 Apr 2014 13:34:45 +0200
"Giampaolo Rodola'" <g.rodola at gmail.com>
wrote:
> With current socket.sendall() implementation if an error occurs it's
> impossible to tell how much data was sent. As such I'm wondering whether it
> would make sense to add a "counter" parameter which gets incremented
> internally:
> 
> sent = 0
> try:
>      sock.sendall(data, counter=sent)
> except socket.error as err:
>      priint("only %s bytes were sent" % sent)
> 
> This would both allow to not lose information on error and avoid keeping
> track of the total data being sent, which usually requires and extra len()
> call. E.g. when sending a file:
> 
> file = open('somefile', 'rb')
> total = 0
> while True:
>     chunk = file.read(8192)
>     if not chunk:
>         break
>     sock.sendall(chunk, counter=total)

Why not simply use send() in such cases?
(or, if you want something file-like, call makefile() and then write())

Regards

Antoine.
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