Fix #934 infinite redirects with SSL HTTPS & NGIX

Fixes two issues.

First, updates NGINX configuration files to pass $request_uri
port of URL from port 80 to port 443. Failing to pass $request_uri
tosses user (and non-users with invites) to home page rather than
requested url.

Second, and more signficantly, scheme `https` in `govready-url`
parameter was also setting `SECURE_SSL_REDIRECT` at the Django app
causing infinite redirects behind an NGINX reverse proxy that was
terminating the SSL connection and passing to local `http://localhost:8000`.
Fix was to let `SECURE_SSL_REDIRECT` remain its default `False` and
add new parameter `secure_ssl_redirect` for situations when deployment
called on Django to handle redirect.

CHANGELOG.md

@@ -1,6 +1,25 @@
 GovReady-Q Release Notes
 ========================
 
+v0.9.1.22.7 (June 12, 2020)
+---------------------------
+
+**Deployment fix**
+
+* Remove conflict leading to infinite redirects when terminating SSL at a reverse proxy caused by SECURE_SSL_REDIRECT being set to `True` in `settings.py` telling Django to also redirect insecure `https` connections on the same server. Introduces optional new `secure_ssl_redirect`
+parameter setting for `local/enviornment.json` file for deployments where Django redirect should be used. See: https://github.com/GovReady/govready-q/issues/934.
+
+# Force Django to redirect non-secure SSL connections to secure ssl connections
+# NOTE: Setting to True while simultaneously using a http proxy like NGINX
+#       that is also redirecting can lead to infinite redirects.
+#       See: https://docs.djangoproject.com/en/3.0/ref/settings/#secure-ssl-redirect
+#       SECURE_SSL_REDIRECT is False by default.
+
+**Documentation fix**
+
+* Update documentation on NGINX deployments to include `$request_uri` when redirecting from port 80 to port 443.
+* Update documentation to explain new `secure_ssl_redirect` parameter.
+
 v0.9.1.22.6 (June 10, 2020)
 ---------------------------
 

VERSION

@@ -1,2 +1 @@
-v0.9.1.22.6
-
+v0.9.1.22.7

docs/source/installation-guide/Environment.rst

@@ -46,14 +46,18 @@ launching a container with GovReady-Q.
 -  ``secret-key`` - used to make instance more secure by contributing a
    salt value to generating various random strings and hashes. Do not
    share.
--  ``gr-pdf-generator`` - specifies the library/process used to generate PDFs,
+-  ``gr-pdf-generator``: specifies the library/process used to generate PDFs,
    options are `off` and `wkhtmltopdf` and default is `None`.
--  ``gr-img-generator`` - specifies the library/process used to generate images and thumbnails,
+-  ``gr-img-generator``: specifies the library/process used to generate images and thumbnails,
    options are `off` and `wkhtmltopdf` and default is `None`.
 -  ``single-organization``: used to enforce single organization mode
    with “main” as subdomain of default organization instead of
    multi-tenant with different subdomains for different organizations.
--  ``static``: used to prepend a root path to the default ``/static/``
+- ``secure_ssl_redirect``: tells Django to redirect any non-secure connections to secure
+  HTTPS (SSL) connections when terminating SSL at Django and connection scheme is ``https``;
+  setting ``secure_ssl_redirect`` to ``true`` behind a reverse proxy that is also managing
+  redirects can cause infinite redirects.
+-  ``static``  used to prepend a root path to the default ``/static/``
    URL path for accessing static assets.
 -  ``syslog``: used to set the host and port of a syslog-compatible log
    message sink. (Default: None.)

docs/source/installation-guide/installing-govready-q-server/linux/ubuntu/index.rst

@@ -575,14 +575,16 @@ be replaced with your domain.
 Example - HTTPS on 443 and HTTP on 80 redirecting to HTTPS on 443
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-The below example shows a basic version of ``/nginx/sites-available/nginx-govready-q.conf`` redirecting port 80 to 443.
+The below example shows a basic version of ``/nginx/sites-available/nginx-govready-q.conf`` redirecting port 80 to 443
+while passing the path to the requested files along with the redirect.
 
 .. code:: text
 
    server {
       listen 80;
       server_name example.com;
-      return 302 https://example.com;
+      return 302 https://$server_name:443$request_uri;
+
    }
 
    server {
@@ -606,6 +608,10 @@ The below example shows a basic version of ``/nginx/sites-available/nginx-govrea
    port 80 from ``/etc/nginx/sites-enabled/``. Failure to remove the default configuration
    file will create two conflicting NGINX servers listening on port 80.
 
+.. warning::
+   It is important to include the ``$request_uri`` in any redirect of the URL for the redirected
+   user to be routed to the request page.
+
 Example - Listening both HTTP on 80 and HTTPS on 443
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
@@ -647,7 +653,7 @@ on both ports because we want logins to GovReady-Q to be encrypted.
        # listen [::]:80;
        listen 80;
        server_name example.com;
-       return 301 https://example.com;
+       return 302 https://$server_name:443$request_uri;
      }
 
      server {
@@ -687,7 +693,6 @@ on both ports because we want logins to GovReady-Q to be encrypted.
        }
      }
 
-
 .. note::
    Some code for creating and using a self-generated certificated
 

local-examples/local-ubuntu-postgres-nginx-gunicorn-supervisor-http/nginx-govready-q-https.conf

@@ -2,8 +2,7 @@
   server {
     # listen [::]:80;
     listen 80;
-    server_name example.com;
-    return 301 https://example.com;
+    return 302 https://$server_name:443$request_uri;
   }
 
   server {

siteapp/settings.py

@@ -66,6 +66,7 @@ def make_secret_key():
 from urllib.parse import urlparse
 GOVREADY_URL = urlparse(environment.get("govready-url",""))
 
+
 # Set Django's ALLOWED_HOSTS parameter.
 # Use the deprecated 'host' environment parameter and preferred 'govready-url'.
 # The port is used in SITE_ROOT_URL must be removed from ALLOWED_HOSTS.
@@ -344,9 +345,16 @@ def make_secret_key():
 	SESSION_COOKIE_SECURE = True
 	CSRF_COOKIE_HTTPONLY = True
 	CSRF_COOKIE_SECURE = True
-	SECURE_SSL_REDIRECT = True
 	SECURE_HSTS_SECONDS = 31536000
 	SECURE_HSTS_INCLUDE_SUBDOMAINS = True
+	if environment.get("secure_ssl_redirect", False):
+		# Force Django to redirect non-secure SSL connections to secure SSL connections
+		# NOTE: Setting to True while simultaneously using a http proxy like NGINX
+		#       that is also redirecting can lead to infinite redirects.
+		#       See: https://docs.djangoproject.com/en/3.0/ref/settings/#secure-ssl-redirect
+		#       SECURE_SSL_REDIRECT is False by default.
+		SECURE_SSL_REDIRECT = True
+		print("INFO: SECURE_SSL_REDIRECT is set to 'True'. May cause infinite redirects behind reverse proxies.")
 else:
 	print("INFO: Connection scheme is 'http'.")
 	# Silence some checks about HTTPS.
@@ -357,6 +365,10 @@ def make_secret_key():
 		'security.W016', # CSRF_COOKIE_SECURE not set
 	]
 
+
+	SECURE_SSL_REDIRECT = False
+
+
 # Other security headers.
 SECURE_BROWSER_XSS_FILTER = True
 SECURE_CONTENT_TYPE_NOSNIFF = True