[zeromq-dev] ZMQ appends weird characters to message

gonzalo diethelm gdiethelm at dcv.cl
Mon Sep 15 16:47:30 CEST 2014

Good point. Forgot about the specific details for that C++ constructor. The null byte should not be required.

As Tom points out, you should print out what you are sending and receiving (contents and length) and make sure it makes sense.


Gonzalo Diethelm
DCV Chile

> -----Original Message-----
> From: zeromq-dev-bounces at lists.zeromq.org [mailto:zeromq-dev-
> bounces at lists.zeromq.org] On Behalf Of Tom Quarendon
> Sent: Monday, September 15, 2014 11:42 AM
> To: ZeroMQ development list
> Subject: Re: [zeromq-dev] ZMQ appends weird characters to message
> > You have two choices:
> > 1. Send the '\0' as part of the message (and set length to one more byte).
> > 2. Append a '\0' after receiving the message.
> Uh, why?
> string(static_cast<char*>(reply.data()),reply.size());
> doesn't assume the string is null terminated. It constructs string from pointer
> and length. Isn't adding a in a null just going mask the real issue and make it
> look like the std::string only contained "login" when really it still contained
> the extra stuff as well.
> David, Do you know what reply.size() actually contains? Have you tried
> printing that out and comparing it to what you expect?
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