[wp-trac] [WordPress Trac] #28722: Boost performance with ETag in load-scripts.php and load-styles.php

[WordPress Trac]

#28722: Boost performance with ETag in load-scripts.php and load-styles.php
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 Reporter:  sergej.mueller   |       Owner:
     Type:  feature request  |      Status:  new
 Priority:  normal           |   Milestone:  4.5
Component:  Script Loader    |     Version:  4.0
 Severity:  normal           |  Resolution:
 Keywords:  has-patch        |     Focuses:  administration, performance
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Comment (by swissspidy):

 Replying to [comment:11 ocean90]:
 > Replying to [comment:10 swissspidy]:
 > > [attachment:28722.4.diff] now uses `status_header( 304 )`.
 >
 > That will produce a fatal error because the function isn't available
 there.

 Oops, you're right. My bad.

 Well then something along these lines should do the trick:

 {{{#!php
 $protocol = $_SERVER['SERVER_PROTOCOL'];
 if ( ! in_array( $protocol, array( 'HTTP/1.1', 'HTTP/2', 'HTTP/2.0' ) ) )
 {
         $protocol = 'HTTP/1.0';
 }
 header( "$protocol 304 Not Modified" );
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/28722#comment:12>
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