A label that describes this purger.
What sort of item will this purger clear?
In this section you configure how a single HTTP request looks like.
Uncheck to disable certificate verification (this is insecure!).
Configure the outbound HTTP headers, leave empty to delete. Example for Tag as Type: Cache-Tags for Header and [invalidation:expression] for Value.
Header Value
Number of seconds to wait after a group of HTTP requests (so that other purgers get fresh content)
Maximum number of HTTP requests that can be made during Drupal's execution lifetime. Usually PHP resource restraints lower this value dynamically, but can be met at the CLI.
When you uncheck this setting, capacity will be based on the sum of both timeouts. By default, capacity will automatically adjust (up and down) based on measured time data.
The timeout of the request in seconds.
The number of seconds to wait while trying to connect to a server.

Tokens are replaced for the Path and header Value fields.

Token Description
Pipe separated
[invalidations:separated_pipe]		 Merged list of all expressions, for example tag:1|tag:2|path/4|http://url5|tag:6.
Comma separated
[invalidations:separated_comma]		 Merged list of all expressions, for example tag:1,tag:2,path/4,http://url5,tag:6.
Tab separated
[invalidations:separated_tab]		 Merged list of all expressions, for example tag:1 tag:2 path/4.