* embargo: add support for per-collection date range embargo with embargo options of 'before', 'after', 'newer' and 'older'
'before' and 'after' accept a timestamp
'newer' and 'older' options configured with a dictionary consisting of any combo of 'years', 'months', 'days'
add basic test for each embargo option
* acl/embargo work:
- support acl access value 'allow_ignore_embargo' for overriding embargo
- support 'user' in acl setting, matched with value of 'X-Pywb-ACL-User' header
- support passing through 'X-Pywb-ACL-User' setting to warcserver
- aclmanager: support -u/--user param for adding, removing and matching rules
- tests: add test for 'allow_ignore_embargo', user-specific acl rule matching
* docs: add docs for new embargo system!
* docs: add info on how to configure ACL header with short examples to usage page.
sample-deploy: add examples of configuring X-pywb-ACL-user header based on IP for nginx and apache sample deployments
* docs: fix access control page header, text tweaks
* bump version to 2.6.0b0
* brotli: if the brotli module can not be loaded, print warning
and also remove `br` from any Accept-Encoding header to avoid recording with brotli, addresses #434
(Origin header received will be the pywb host, using Referer will result in more accurate Origin, which may not be the target url)
tests: add tests to verify Origin header with and without Referer
proxy mode support readded!
- use wsgiprox wrapper in FrontEndApp.init_proxy() with fixed collection prefix, ca options
- cli --proxy <coll> flag added to specify proxy collection
- cleanup: remove cookie rw (already disabled), fix post handling paths
- headers: ensure request headers are not rewritten when in proxy mode, response headers marked with 'url-rewrite' also no rewritten if no url rewrite/proxy mode
- urlrewriter: add IdentityRewriter with no rewriting as default, instead of SchemeOnlyUrlRewriter
- memento support: for now, only include rel="original" and Memento-Datetime in for proxy replay response
- responseloader: disable urllib3 unsecure response warnings
- tests: add test for proxy replay and proxy record/replay of new collection
