initial implementation of reverse proxy, using django-revproxy from within a middleware

add new config entry "primary_domain" which is used to set the cookie domain

passbook/app_gw/models.py

@@ -0,0 +1,61 @@
+"""passbook app_gw models"""
+from django.contrib.postgres.fields import ArrayField
+from django.db import models
+from django.utils.translation import gettext as _
+
+from passbook.core.models import Policy, PropertyMapping, Provider
+
+
+class ApplicationGatewayProvider(Provider):
+    """Virtual server which proxies requests to any hostname in server_name to upstream"""
+
+    server_name = ArrayField(models.TextField())
+    upstream = ArrayField(models.TextField())
+    enabled = models.BooleanField(default=True)
+
+    authentication_header = models.TextField(default='X-Remote-User')
+    default_content_type = models.TextField(default='application/octet-stream')
+    upstream_ssl_verification = models.BooleanField(default=True)
+
+    form = 'passbook.app_gw.forms.ApplicationGatewayProviderForm'
+
+    @property
+    def name(self):
+        """since this model has no name property, return a joined list of server_names as name"""
+        return ', '.join(self.server_name)
+
+    def __str__(self):
+        return "Application Gateway %s" % ', '.join(self.server_name)
+
+    class Meta:
+
+        verbose_name = _('Application Gateway Provider')
+        verbose_name_plural = _('Application Gateway Providers')
+
+
+class RewriteRule(PropertyMapping):
+    """Rewrite requests matching `match` with `replacement`, if all polcies in `conditions` apply"""
+
+    REDIRECT_INTERNAL = 'internal'
+    REDIRECT_PERMANENT = 301
+    REDIRECT_FOUND = 302
+
+    REDIRECTS = (
+        (REDIRECT_INTERNAL, _('Internal')),
+        (REDIRECT_PERMANENT, _('Moved Permanently')),
+        (REDIRECT_FOUND, _('Found')),
+    )
+
+    match = models.TextField()
+    halt = models.BooleanField(default=False)
+    conditions = models.ManyToManyField(Policy)
+    replacement = models.TextField() # python formatted strings, use {match.1}
+    redirect = models.CharField(max_length=50, choices=REDIRECTS)
+
+    def __str__(self):
+        return "Rewrite Rule %s" % self.name
+
+    class Meta:
+
+        verbose_name = _('Rewrite Rule')
+        verbose_name_plural = _('Rewrite Rules')