* Allow render HTML with css/js external links
* Fix bug because of filename escape chars
* Fix lint
* Update docs about new configuration item
* Fix bug of render HTML in sub directory
* Add CSP head for displaying iframe in rendering file
* Fix test
* Apply suggestions from code review
Co-authored-by: delvh <dev.lh@web.de>
* Some improvements
* some improvement
* revert change in SanitizerDisabled of external renderer
* Add sandbox for iframe and support allow-scripts and allow-same-origin
* refactor
* fix
* fix lint
* fine tune
* use single option RENDER_CONTENT_MODE, use sandbox=allow-scripts
* fine tune CSP
* Apply suggestions from code review
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: delvh <dev.lh@web.de>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
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