Vimexx hosting compatibility

[piotrbak]

Vimexx hosting is using Varnish on their servers. In order to purge their cache, we need to add additional headers to our requests:
host-ZXCS:
X-Purge-ZXCS: true

Current state
Right now we can use the following snippet to make the compatibility:
http://snippi.com/s/21eii77

Ideal state
Make automatic detection and integration with this hosting provider.

Related tickets:
https://secure.helpscout.net/conversation/1194833523/172813
https://secure.helpscout.net/conversation/1155460964/162836/

Backlog Grooming (for WP Media dev team use only)

• Reproduce the problem
• Identify the root cause
• Scope a solution
• Estimate the effort

[GeekPress]

@piotrbak Is there a way to know a website is hosed on Vimexx?

[webtrainingwheels]

@GeekPress After speaking with @piotrbak, I've sent them an email about this: https://secure.helpscout.net/conversation/1204722684/175580?folderId=377610

[GeekPress]

@GeekPress After speaking with @piotrbak, I've sent them an email about this: https://secure.helpscout.net/conversation/1204722684/175580?folderId=377610

Thanks 🙏

[vmanthos]

Related ticket of a Vimexx customer:
https://secure.helpscout.net/conversation/1214845335/177832/

[mifrero]

Related ticket https://secure.helpscout.net/conversation/1227894272/180833/
The issue is related to to making it work when Cloudflare is enabled.

[webtrainingwheels]

Testing account info here: https://secure.helpscout.net/conversation/1227675409/180792?folderId=377610#thread-3562847380

[DahmaniAdame]

Related ticket - https://secure.helpscout.net/conversation/1377218868/226221

[vmanthos]

Related ticket: https://secure.helpscout.net/conversation/1520157492/265830/

The Vimexx-specific headers were set using:

add_filter('rocket_varnish_purge_headers', 'filter_rocket_varnish_args' );
function filter_rocket_varnish_args( $headers ){
	$headers[ 'X-Purge-ZXCS' ] = 'true';
	$headers[ 'host-ZXCS' ] = $headers['host'];
	return $headers;
}

However, adding Vimexx's IPs using our helper plugin, didn't purge the cache.
What did was:

• setting the $scheme to HTTPS:

add_filter( 'rocket_varnish_http_purge_scheme', function( $scheme ){
	$scheme = 'https';
	return $scheme;
});

• replacing the IP of the $purge_url with Varnish's TLD:

add_filter( 'rocket_varnish_purge_url', function( $purge_url ) {
	$purge_url = str_replace( '185.104.28.118', 'varnish3.zxcs.nl', $purge_url);
	return $purge_url;
});

[DahmaniAdame]

Related - https://secure.helpscout.net/conversation/1548745501/273032/