{# This file configures apache to redirect requests from ports to specific urls.
 # It provides SSL support for server and optionaly for client.
 #
 # All parameters are given through the `parameter_dict` variable, see the
 # list entries :
 #
 #     parameter_dict = {
 #       #  The path given to "PidFile"
 #       "pid-file": "<file_path>",
 #
 #       #  The number given to "TimeOut"
 #       "timeout": 300,
 #
 #       #  The path given to "SSLCertificateFile"
 #       "cert": "<file_path>",
 #
 #       #  The path given to "SSLCertificateKeyFile"
 #       "key": "<file_path>",
 #
 #       #  The value given to "SSLCipherSuite" (can be empty)
 #       "cipher": "",
 #
 #       #  The path given to "SSLSessionCache shmcb:<folder_path>(512000)"
 #       "ssl-session-cache": "<folder_path>",
 #
 #       #  The path given to "SSLCACertificateFile" (can be empty)
 #       #  If this value is not empty, it enables client certificate check.
 #       #  (Enabling "SSLVerifyClient require")
 #       "ca-cert": "<file_path>",
 #
 #       #  The path given to "SSLCARevocationFile" (used if ca-cert is not
 #       #  empty)
 #       "crl": "<file_path>",
 #
 #       #  The path given to "ErrorLog"
 #       "error-log": "<file_path>",
 #
 #       #  The path given to "AccessLog"
 #       "access-log": "<file_path>",
 #
 #       #  The list of ip which apache will listen to.
 #       "ip-list": [
 #         "0.0.0.0",
 #         "[::1]",
 #       ],
 #
 #       #  The list of backends which apache should redirect to.
 #       "backend-list": [
 #         # (port, unused, internal_scheme)
 #         (8000, _, "http://10.0.0.10:8001"),
 #         (8002, _, "http://10.0.0.10:8003"),
 #       ],
 #     }
 #
 # This sample of `parameter_dict` will make apache listening to :
 # - 0.0.0.0:8000 redirecting internaly to http://10.0.0.10:8001
 # - [::1]:8000 redirecting internaly to http://10.0.0.10:8001
 # - 0.0.0.0:8002 redirecting internaly to http://10.0.0.10:8003
 # - [::1]:8002 redirecting internaly to http://10.0.0.10:8003
-#}
LoadModule unixd_module modules/mod_unixd.so
LoadModule access_compat_module modules/mod_access_compat.so
LoadModule authz_core_module modules/mod_authz_core.so
LoadModule authz_host_module modules/mod_authz_host.so
LoadModule log_config_module modules/mod_log_config.so
LoadModule setenvif_module modules/mod_setenvif.so
LoadModule version_module modules/mod_version.so
LoadModule proxy_module modules/mod_proxy.so
LoadModule proxy_http_module modules/mod_proxy_http.so
LoadModule socache_shmcb_module modules/mod_socache_shmcb.so
LoadModule ssl_module modules/mod_ssl.so
LoadModule mime_module modules/mod_mime.so
LoadModule dav_module modules/mod_dav.so
LoadModule dav_fs_module modules/mod_dav_fs.so
LoadModule negotiation_module modules/mod_negotiation.so
LoadModule rewrite_module modules/mod_rewrite.so
LoadModule headers_module modules/mod_headers.so
LoadModule deflate_module modules/mod_deflate.so
LoadModule filter_module modules/mod_filter.so

AddOutputFilterByType DEFLATE text/cache-manifest text/html text/plain text/css application/hal+json application/json application/x-javascript text/xml application/xml application/rss+xml text/javascript image/svg+xml application/x-font-ttf application/font-woff application/font-woff2 application/x-font-opentype

PidFile "{{ parameter_dict['pid-file'] }}"
ServerAdmin admin@
TypesConfig conf/mime.types
AddType application/x-compress .Z
AddType application/x-gzip .gz .tgz

ServerTokens Prod
ServerSignature Off
TraceEnable Off

TimeOut {{ parameter_dict['timeout'] }}

SSLCertificateFile {{ parameter_dict['cert'] }}
SSLCertificateKeyFile {{ parameter_dict['key'] }}
SSLRandomSeed startup builtin
SSLRandomSeed connect builtin
SSLProtocol all -SSLv2 -SSLv3
SSLHonorCipherOrder on
{% if parameter_dict['cipher'] -%}
SSLCipherSuite {{ parameter_dict['cipher'] }}
{% else %}
SSLCipherSuite ECDH+AESGCM:DH+AESGCM:ECDH+AES256:DH+AES256:ECDH+AES128:DH+AES:ECDH+3DES:DH+3DES:RSA+AESGCM:RSA+AES:RSA+3DES:HIGH:!aNULL:!MD5
{%- endif %}
SSLSessionCache shmcb:{{ parameter_dict['ssl-session-cache'] }}(512000)
SSLProxyEngine On

# As backend is trusting REMOTE_USER header unset it always
RequestHeader unset REMOTE_USER
RequestHeader unset SSL_CLIENT_SERIAL
{% if parameter_dict['ca-cert'] -%}
SSLVerifyClient optional
RequestHeader set REMOTE_USER %{SSL_CLIENT_S_DN_CN}s
RequestHeader set SSL_CLIENT_SERIAL "%{SSL_CLIENT_M_SERIAL}s"
SSLCACertificateFile {{ parameter_dict['ca-cert'] }}
{%   if not parameter_dict['shared-ca-cert'] %}
{%     if parameter_dict['crl'] -%}
SSLCARevocationCheck chain
SSLCARevocationFile {{ parameter_dict['crl'] }}
{%-     endif %}
{%-   endif %}
{%- endif %}

ErrorLog "{{ parameter_dict['error-log'] }}"
# Default apache log format with request time in microsecond at the end
LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\" %D" combined
CustomLog "{{ parameter_dict['access-log'] }}" combined

<Directory />
  Options FollowSymLinks
  AllowOverride None
  Allow from all
</Directory>

RewriteEngine On
{% for port, _, backend, enable_authentication in parameter_dict['backend-list'] -%}
{%   for ip in parameter_dict['ip-list'] -%}
Listen {{ ip }}:{{ port }}
{%   endfor -%}
<VirtualHost *:{{ port }}>
  SSLEngine on
{% if enable_authentication and parameter_dict['shared-ca-cert'] and parameter_dict['shared-crl'] -%}
  SSLVerifyClient require
  # Custom block we use for now different parameters.
  RequestHeader set REMOTE_USER %{SSL_CLIENT_S_DN_CN}s
  SSLCACertificateFile {{ parameter_dict['shared-ca-cert'] }}
  SSLCARevocationPath {{ parameter_dict['shared-crl'] }}

  LogFormat "%h %l %{REMOTE_USER}i %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\" %D" combined

  # We would like to separate the the authentificated logs.
  ErrorLog "{{ parameter_dict['log-dir'] }}/apache-service-error.log"
  CustomLog "{{ parameter_dict['log-dir'] }}/apache-service-access.log" combined
{% endif -%}
  RewriteRule ^/(.*) {{ backend }}/$1 [L,P]
</VirtualHost>
{% endfor -%}
