[wp-trac] [WordPress Trac] #36334: Custom RSS feed has wrong MIME type and forces download in browser

[WordPress Trac]

#36334: Custom RSS feed has wrong MIME type and forces download in browser
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 Reporter:  Missilesilo   |       Owner:
     Type:  defect (bug)  |      Status:  reopened
 Priority:  normal        |   Milestone:
Component:  Feeds         |     Version:  2.1
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:
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Comment (by swissspidy):

 Ignore my previous comment. I just had another look at this and couldn't
 find any problem.

 {{{#!php
 <?php
 // Example A:

 function trac_36334_add_superfeed() {
         add_feed( 'superfeed', 'trac_36334_superfeed_cb' );
 }

 add_action( 'init', 'trac_36334_add_superfeed' );

 function trac_36334_superfeed_cb() {
         header( 'Content-Type: text/html' );
         echo 'Do something...';
 }
 }}}

 {{{#!php
 <?php
 // Example B:

 function trac_36334_add_superduperfeed() {
         add_feed( 'superduperfeed', 'trac_36334_superduperfeed_cb' );
 }

 add_action( 'init', 'trac_36334_add_superduperfeed' );

 function trac_36334_superduperfeed_cb() {
         header( 'Content-Type: text/html' ); // or any other content type
         echo 'Do something...';
 }

 function trac_36334_superduperfeed_type( $content_type, $type ) {
         if ( 'superduperfeed' === $type ) {
                 return feed_content_type( 'rss2' );
         }

         return $content_type;
 }

 add_filter( 'feed_content_type', 'trac_36334_superduperfeed_type', 10, 2
 );
 }}}

 Both examples work as expected running WordPress 4.5 and no additional
 plugins.

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Ticket URL: <https://core.trac.wordpress.org/ticket/36334#comment:7>
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