[wp-trac] [WordPress Trac] #11588: show_message() should flush the output buffers when its called.

[WordPress Trac]

#11588: show_message() should flush the output buffers when its called.
----------------------------+-----------------------------------------------
 Reporter:  dd32            |       Owner:           
     Type:  defect (bug)    |      Status:  new      
 Priority:  normal          |   Milestone:  3.0      
Component:  Administration  |     Version:  2.9      
 Severity:  normal          |    Keywords:  has-patch
----------------------------+-----------------------------------------------

Comment(by Denis-de-Bernardy):

 FWIW, the suggested patch doesn't flush hard enough.

 I use this function, personally:

 {{{
         function force_flush() {
                 echo "\n\n<!-- Deal with browser-related buffering by
 sending some incompressible strings -->\n\n";

                 for ( $i = 0; $i < 5; $i++ )
                         echo "<!--
 abcdefghijklmnopqrstuvwxyz1234567890aabbccddeeffgghhiijjkkllmmnnooppqqrrssttuuvvwwxxyyzz11223344556677889900abacbcbdcdcededfefegfgfhghgihihjijikjkjlklkmlmlnmnmononpopoqpqprqrqsrsrtstsubcbcdcdedefefgfabcadefbghicjkldmnoepqrfstugvwxhyz1i234j567k890laabmbccnddeoeffpgghqhiirjjksklltmmnunoovppqwqrrxsstytuuzvvw0wxx1yyz2z113223434455666777889890091abc2def3ghi4jkl5mno6pqr7stu8vwx9yz11aab2bcc3dd4ee5ff6gg7hh8ii9j0jk1kl2lmm3nnoo4p5pq6qrr7ss8tt9uuvv0wwx1x2yyzz13aba4cbcb5dcdc6dedfef8egf9gfh0ghg1ihi2hji3jik4jkj5lkl6kml7mln8mnm9ono
 -->\n\n";

                 while ( ob_get_level() )
                         ob_end_flush();

                 @ob_flush();
                 @flush();
                 @set_time_limit(FS_TIMEOUT);
         } # force_flush()

 }}}

 and before it, at the very beginning of the various upgrader scripts:

 {{{
         if ( function_exists('apache_setenv') )
                 @apache_setenv('no-gzip', 1);
         @ini_set('zlib.output_compression', 0);
         @ini_set('implicit_flush', 1);
 }}}

 anything short of that will reveal that the flushing does not occur on
 some servers and some user agents.

-- 
Ticket URL: <http://core.trac.wordpress.org/ticket/11588#comment:3>
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