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- Makefile: added support for howtos
- README: replaced unintended tabs with spaces - TODO: items - docbook/docbookxi.dtd: ICTBALL renamed to ICDL - docbook/xmldocs.css: quite a lot of tuning - guides/iccattut.xml: little wording and XML fixes - refs/*/example*: replacing tabs with spaces (XML wants that) - other...
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| Original file line number | Diff line number | Diff line change |
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| <chapter id="CustomSendmailRoutine"> | ||
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| <chapterinfo> | ||
| <title>Custom Sendmail Routine</title> | ||
| <titleabbrev>customsendmail</titleabbrev> | ||
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| <keywordset> | ||
| <keyword>custom</keyword> | ||
| <keyword>send</keyword> | ||
| <keyword>mail</keyword> | ||
| <keyword>routine</keyword> | ||
| <keyword>delay</keyword> | ||
| </keywordset> | ||
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| <authorgroup> | ||
| <author> | ||
| <firstname>Mike</firstname> | ||
| <surname>Heins</surname> | ||
| <affiliation> | ||
| <email>mheins@perusion.net</email> | ||
| </affiliation> | ||
| </author> | ||
| </authorgroup> | ||
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| </chapterinfo> | ||
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| <sect1 id='introduction'> | ||
| <title>Introduction</title> | ||
| <para> | ||
| Someone <ulink url="http://www.icdevgroup.org/pipermail/interchange-users/2004-July/039811.html">was wondering</ulink> how to optimize the order processing on a busy site. It was observed that about once in every ten times, the <filename>etc/mail_receipt</filename> takes a few <emphasis>extra</emphasis> seconds before it's mailed out. | ||
| </para> | ||
| <para> | ||
| The delay occured because in the code used, the <option>SendMailProgram</option> ran in foreground so the ordering process "stalled" for a few seconds (or at least that's how the average customer saw it). The critical section was reduced to: | ||
| </para> | ||
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| <screen> | ||
| <![CDATA[ | ||
| [email to="[scratch to_email], __MAIL_RECEIPT_CC__" | ||
| subject="__COMPANY__ Order #[value mv_order_number]: [scratch subject_end]" | ||
| from=|"__COMPANY__ Order Confirmation" <orders at company.com>| ] | ||
| ... email contents ... | ||
| [/email] | ||
| ]]> | ||
| </screen> | ||
| </sect1> | ||
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| <sect1 id='solution'> | ||
| <title>Solution</title> | ||
| <para> | ||
| To eliminate this "delay", you could use a custom script that accepts the message on standard input (STDIN), and then calls <application>Sendmail</application> in the background. | ||
| </para> <para> | ||
| Save the script with the following contents to <filename>/usr/local/bin/sendmail-bg</filename>: | ||
| </para> | ||
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| <programlisting> | ||
| <![CDATA[ | ||
| #!/usr/bin/perl | ||
| #use strict; | ||
| #use warnings; | ||
| use File::Temp; | ||
| my $basedir = '/tmp/sendmail'; | ||
| my $sendmail = '/usr/sbin/sendmail -t'; | ||
| umask 2; | ||
| mkdir $basedir unless -d $basedir; | ||
| my $tmp = File::Temp->new( DIR => $basedir ); | ||
| my $tmpnam = $tmp->filename; | ||
| open OUT, "> $tmpnam" or die "Cannot create $tmpnam: $!\n"; | ||
| my $cmdline = join " ", $sendmail, '<', $tmpnam, '&'; | ||
| while(<>) { print OUT $_; } | ||
| close OUT; | ||
| system($cmdline); | ||
| if($?) { die "Failed to fork sendmail: $!\n" } | ||
| ]]> | ||
| </programlisting> | ||
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| <para> | ||
| And of course, don't forget to add/modify the <option>SendMailProgram</option> directive: | ||
| </para> | ||
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| <programlisting> | ||
| SendMailProgram /usr/local/bin/sendmail-bg | ||
| </programlisting> | ||
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| </sect1> | ||
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| </chapter> | ||
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