CVS log for loncom/rewrites/loncapa_rewrite_on.conf

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- For servers using Apache/SSL where External Resource points at http:// URL
  or syllabus is configured to use an external http:// URL, query string for
  links contains usehttp=1, unless server has Strict-Transport-Security set
  for Apache with max-age > 0.

- Eliminate jsMath (MathJax used instead).
- Rewrite rule no longer needed for external tools with http URLs launch
  in iframe (lonwrapper.pm ensures launch in tab instead).

- Append ?usehttp=1 to link to syllabus where LON-CAPA syllabus is configured
  to use external http:// URL, but LON-CAPA server uses https:// to avoid
  mixed active content issue (see also bug 6662).
- Preview of external http:// URL displayed in separate pop-up window
  instead of in modal window on https:// server.

- Bug 6754. Make LON-CAPA an LTI Tool Consumer (LTI 1.1). Work in progress.

- Bug 6662.
  - jsMath files need to be served using the same protocol as the page
    using them (i.e., http for external resources pointing at http://
    and syllabus pages).

- Related to bug 6662.
  - Always serve syllabus from non-SSL (i.e., http).
  - Syllabus can be set to point at an external URL, in which case the
    external web page is loaded in an iframe. If the remote URL is
    http://, the syllabus needs to be served from port 80, if the
    LON-CAPA server hosting the session has Apache/SSL (otherwise Firefox
    will block loading of the content in the iframe, by default).
 -  In addition to committed changes in LON-CAPA modules, an appropriate
    RewriteRule is also needed for <VirtualHost _default_:443> (e.g.,
    in /etc/httpd/conf.d/ssl.conf on the LON-CAPA server. (see:
    http://bugs.loncapa.org/show_bug.cgi?id=6662).

- Bug 6662
  - External Resource items in which the remote URL is http:// need to be
    served from port 80, if the LON-CAPA server hosting the session has
    Apache/SSL.

 -  In addition to committed changes in LON-CAPA modules, an appropriate
    RewriteRule is also needed for <VirtualHost _default_:443> (e.g.,
    in /etc/httpd/conf.d/ssl.conf on the LON-CAPA server. (see:
    http://bugs.loncapa.org/show_bug.cgi?id=6662).

- Bug 5925.
- Support for rewriting of http:// to https:// for external web requests
  if mod_ssl and mod_rewrite enabled.  Default is: Rewrite off.

- webserver.piml
  - Update description to accommodate additional distros.
  - Error message generated if Apache config file is missing tailored to
    distro.
  - Compare LON-CAPA config file to rewrite: http:// -> https:// with
    default files (rewrite Off and rewrite On); report if neither matches.

- loncapafiles.lpml
  - Only need /etc/httpd/conf directory for CentOS/Red Hat/SL/Fedora
  - Default files for rewrites Off and rewrites On in loncom/rewrites

- loncapa_apache.conf
  - Include conf/loncapa_rewrite.conf  to support rewrite.