From 86c75996f051e574c95b9b163dfbaf37b4b4c8c2 Mon Sep 17 00:00:00 2001
From: Aymeric Augustin <aymeric.augustin@m4x.org>
Date: Tue, 11 Nov 2014 22:57:50 +0100
Subject: [PATCH] Added dummy template backend.

---
 django/template/backends/dummy.py | 52 +++++++++++++++++++++++++++++++
 django/template/backends/utils.py | 14 +++++++++
 2 files changed, 66 insertions(+)
 create mode 100644 django/template/backends/dummy.py
 create mode 100644 django/template/backends/utils.py

diff --git a/django/template/backends/dummy.py b/django/template/backends/dummy.py
new file mode 100644
index 0000000000..813a0cf560
--- /dev/null
+++ b/django/template/backends/dummy.py
@@ -0,0 +1,52 @@
+import io
+import string
+
+from django.conf import settings
+from django.core.exceptions import ImproperlyConfigured
+from django.template import TemplateDoesNotExist
+from django.utils.html import conditional_escape
+
+from .base import BaseEngine
+from .utils import csrf_input_lazy, csrf_token_lazy
+
+
+class TemplateStrings(BaseEngine):
+
+    app_dirname = 'template_strings'
+
+    def __init__(self, params):
+        params = params.copy()
+        options = params.pop('OPTIONS').copy()
+        if options:
+            raise ImproperlyConfigured(
+                "Unknown options: {}".format(", ".join(options)))
+        super(TemplateStrings, self).__init__(params)
+
+    def from_string(self, template_code):
+        return Template(template_code)
+
+    def get_template(self, template_name):
+        for template_file in self.iter_template_filenames(template_name):
+            try:
+                with io.open(template_file, encoding=settings.FILE_CHARSET) as fp:
+                    template_code = fp.read()
+            except IOError:
+                continue
+
+            return Template(template_code)
+
+        else:
+            raise TemplateDoesNotExist(template_name)
+
+
+class Template(string.Template):
+
+    def render(self, context=None, request=None):
+        if context is None:
+            context = {}
+        else:
+            context = {k: conditional_escape(v) for k, v in context.items()}
+        if request is not None:
+            context['csrf_input'] = csrf_input_lazy(request)
+            context['csrf_token'] = csrf_token_lazy(request)
+        return self.safe_substitute(context)
diff --git a/django/template/backends/utils.py b/django/template/backends/utils.py
new file mode 100644
index 0000000000..8147bb4988
--- /dev/null
+++ b/django/template/backends/utils.py
@@ -0,0 +1,14 @@
+from django.middleware.csrf import get_token
+from django.utils.functional import lazy
+from django.utils.html import format_html
+from django.utils.safestring import SafeText
+
+
+def csrf_input(request):
+    return format_html(
+        '<input type="hidden" name="csrfmiddlewaretoken" value="{}" />',
+        get_token(request))
+
+
+csrf_input_lazy = lazy(csrf_input, SafeText, str)
+csrf_token_lazy = lazy(get_token, str)