Subject:
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Re: posting failure?
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Newsgroups:
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lugnet.admin.general
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Date:
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Wed, 10 Feb 1999 14:08:59 GMT
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Viewed:
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978 times
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Todd Lehman writes:
> I think the bug almost certainly lies in the last line of datasend(). The
> Camel Book says that callers of syswrite() should be prepared to handle the
> problems that standard I/O normally handles, such as partial writes.[2]
>
> Since ~16KB is a reasonable buffer size for sockets, and will handle most
> news articles without insidious problems, I think what's happening is that
> datasend() is returning false to post() when it's sent largish chunks of
> data. Note also that post() doesn't call dataend() if datasend() fails.
> This seems to cause quit() to hang later.
>
> Instead of using post(@lines), a successful workaround is to use post() and
> send the article line-by-line with repeated datasend($line) calls.
> (Luckily, calling datasend() directly is a perfectly acceptable use of
> Net::NNTP, according to its docs, so it's not really a kludge -- although
> it's probably 1/100 second slower on a large article.)
>
> Anyway, I'll go apply the workaround to the mail-gateway and web-interface
> posting scripts -- then you can post your 27 KB .DAT file[3] -- and then
> I'll probably submit a patch for consideration to the author of Net::Cmd,
> which will also give me a chance to become more certain about the true
> nature of the bug.
>
> --Todd
>
> [1] The post() and datasend() functions in the versions of Net::NNTP and
> Net::Cmd that I have installed are identical to the latest & greatest
> releases on CPAN.
>
> [2] _Programming_Perl_, Second Edition, p. 231.
>
> [3] Some of the lines on the KODIAK1.DAT file you uploaded are longer than
> 80 characters; you probably will experience line-wrapping problems if you
> post it through the web interface. I recommend sending it through the
> e-mail gateway to lugnet.cad.dat. Maybe the news-posting script can be
> modified later to specially handle an actual .DAT file-upload...
Todd,
Thanks for all your hard work to diagnose this problem. I've sent off the
file via email again, so we'll see if it works now.
Thanks again,
Ben.
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Message is in Reply To:
 | | Re: posting failure?
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| (...) Getting closer...I have a workaround. I'll have to talk to the authors of the Net::Cmd module to be absolutely certain about the nature of the problem, but I think I see it clearly now. The post() method of Net::NNTP goes like this[1]: sub (...) (25 years ago, 8-Feb-99, to lugnet.admin.general)
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