<div dir="ltr"><div><div><div><div>Hi,<br></div>Thanks.<br><br></div>I downloaded the nopoll-master.<br></div>I couldn't build it - ./configure, ...<br></div>I had to copy a few files from the opl version (configure, install.sh, Makefile.in, etc.) - what am I doing wrong?<br></div><div class="gmail_extra"><br><div class="gmail_quote">On 12 December 2015 at 11:16, Francis Brosnan Blázquez <span dir="ltr"><<a href="mailto:francis.brosnan@aspl.es" target="_blank">francis.brosnan@aspl.es</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><u></u>
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El mié, 09-12-2015 a las 11:15 +0200, Rami Rosenbaum escribió:
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Hello,<br>
</blockquote>
<br>
Hi Rami,<span class=""><br>
<br>
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I'm using noPoll lib in my Qt GUI application.<br>
<br>
</blockquote>
<blockquote type="CITE">
I am using it in non-blocking mode, within my main thread, using timer-events and a state machine.<br>
<br>
</blockquote>
<blockquote type="CITE">
The scenario happens on both my Ubuntu laptop and my ARM embedded Linux.<br>
</blockquote>
<br></span>
Ok,<span class=""><br>
<br>
<blockquote type="CITE">
I just noticed that when my server was down (I'm not sure what that means, in networking concepts) - nopoll_conn_new() blocked for its' default timeout (20 seconds).<br>
<br>
</blockquote>
<blockquote type="CITE">
So<br>
<b>Question 1: is nopoll_conn_new() blocking?</b><br>
</blockquote>
<br></span>
Ok, yes and no, it is blocking with a timeout but just for sending the client<br>
init (the initial packet that a WebSocket client must send), but the function<br>
does not block the caller until a reply from the server is received and the <br>
handshake is completed,<br>
<br>
So, it essence, nopoll_conn_new (and all its variants) is not blocking<br>
(unless you have a problem with network connection causing send() API<br>
to fail to send the WebSocket init message by returning EWOULD_BLOCK,<br>
which is very likely to not happen),<br>
<br>
In that, the connection (noPollConn) reported by this function have big<br>
chances to be not ready (that's why you have to use nopoll_conn_is_ready<br>
or the blocking one nopoll_conn_wait_until_connection_ready to ensure<br>
you successfully connected),<span class=""><br>
<br>
<blockquote type="CITE">
I found nopoll_conn_connect_timeout(), but it's not in the API.<br>
<br>
</blockquote>
<blockquote type="CITE">
So I changed the timeout:
</blockquote>
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m_ctx->conn_connect_std_timeout = 2 * 1000 * 1000; // 2 seconds<br>
<br>
</blockquote>
<blockquote type="CITE">
and it worked.<br>
</blockquote>
<br></span>
Ok, there's a function (<b>nopoll_conn_connect_timeout) </b>which is<br>
already implemented but wasn't on the nopoll_conn.h header.<br>
<br>
There's also a <b>nopoll_conn_get_connect_timeout</b> that also allows<br>
to get current value configured...but again, it was also missing in the<br>
public header,<br>
<br>
Now, both are available at the nopoll_conn.h header (please checkout<br>
latest SVN <a href="https://github.com/asples/nopoll" target="_blank">https://github.com/asples/nopoll</a>)<span class=""><br>
<br>
<blockquote type="CITE">
<b>Question 2: is nopoll_conn_connect_timeout() in the API?</b><br>
</blockquote>
<br></span>
Yes it shouldn't but wasn't declared at the header, <br><span class="">
<br>
<br>
<blockquote type="CITE">
Anyway - I can't block my main thread, so what do you recommend?<br>
</blockquote>
<br></span>
Ok, you can reduce to the minimum the connect timeout as you did...<br>
<br>
..and after nopoll_conn_new finishes, use mentioned functions regularly<br>
to check if you did connect,<br>
<br>
Best Regards,
<br>
<br>
Thanks<br>
<blockquote type="CITE">
<br>
</blockquote>
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