Re: [naviserver-devel] ns_chan and ns_connchan

[Wolfgang W. <wol...@di...>]

I'm trying to write out html code or javascript code fragments to show 
the progress of the operations.


Am 2017-04-07 um 10:57 schrieb David Osborne:
> Re the first issue, I only have experience of ns_connchan but I 
> believe the situation is the same.
> You can specify r,w,e, or x for the *argument* ?when? upon creation of 
> the callback, but the callback will be triggered upon timeout with a 
>  *value* of $when = "t" regardless of what you specify as the argument 
> when setting up the callback.
>
> "The optional argument /when/ can consist of one or more characters of 
> r, w, e, or x, specifying, when the callback should fire. "
>
> Re the binary problem, What is it you are writing to the channel?
>
> On 7 April 2017 at 08:43, Wolfgang Winkler 
> <wol...@di... 
> <mailto:wol...@di...>> wrote:
>
>     Hi!
>
>     We have some long running scripts, e.g. shrinking of large PDF
>     files, and want to prevent reverse proxy and browser timeouts.
>
>     To achieve this, we are trying to periodically send small packages
>     from the server to the browser while these scripts are running.
>
>     First we tried with ns_conn and ns_sockcallback
>
>         set mychan [ns_conn channel]
>
>         ns_sockcallback $mychan noop t 1
>
>         proc noop {handle when} {
>           # do something
>         }
>
>         ns_chan close $mychan
>
>     When we call this, we get the following error:
>
>         error invalid when specification "t": should be one/more of r,
>         w, e, or x
>
>     which contradicts the documentation of the command here:
>
>     https://naviserver.sourceforge.io/n/naviserver/files/ns_sockcallback.html
>     <https://naviserver.sourceforge.io/n/naviserver/files/ns_sockcallback.html>
>
>     Then we tried something similiar with ns_connchan
>
>     set mychan [ns_connchan detach]
>
>         ns_connchan callback -timeout 1 $mychan noop "r"
>
>     but a ns_connchan write $mychan throws the following error:
>
>         ns_connchan: only binary channels are currently supported.
>         Channel conn0 is not binary
>
>     Is there a solution to this problem?
>
>     regards,
>
>     Wolfgang
>
>
>     -- 
>
>     *Wolfgang Winkler*
>     Geschäftsführung
>     wol...@di...
>     <mailto:wol...@di...>
>     mobil +43.699.19971172 <tel:+43%20699%2019971172>
>
>     dc:*büro*
>     digital concepts Novak Winkler OG
>     Software & Design
>     Landstraße 68, 5. Stock, 4020 Linz
>     www.digital-concepts.com <http://www.digital-concepts.com>
>     tel +43.732.997117.72
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>
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>
>
>
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>
> -- 
> David Osborne
> Qcode Software Limited
> http://www.qcode.co.uk
> T: +44 (0)1463 896484
>
>
>
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-- 

*Wolfgang Winkler*
Geschäftsführung
wol...@di...
mobil +43.699.19971172

dc:*büro*
digital concepts Novak Winkler OG
Software & Design
Landstraße 68, 5. Stock, 4020 Linz
www.digital-concepts.com <http://www.digital-concepts.com>
tel +43.732.997117.72
tel +43.699.1997117.2

Firmenbuchnummer: 192003h
Firmenbuchgericht: Landesgericht Linz