From 2708701cc737de35bd27cde03dc4bd2a32ba91c4 Mon Sep 17 00:00:00 2001
From: Daniel Grossmann-Kavanagh <me@danielgk.com>
Date: Tue, 8 Jan 2019 12:48:17 -0800
Subject: [PATCH] add wsgi.py file

---
 connexion/wsgi.py                         | 23 ++++++++++++
 examples/openapi3/reverseproxy/README.rst | 44 +++++++++++++++++++++++
 2 files changed, 67 insertions(+)
 create mode 100644 connexion/wsgi.py

diff --git a/connexion/wsgi.py b/connexion/wsgi.py
new file mode 100644
index 000000000..6bdf14c6f
--- /dev/null
+++ b/connexion/wsgi.py
@@ -0,0 +1,23 @@
+class ReverseProxied(object):
+
+    def __init__(self, app, script_name=None, scheme=None, server=None):
+        self.app = app
+        self.script_name = script_name
+        self.scheme = scheme
+        self.server = server
+
+    def __call__(self, environ, start_response):
+        script_name = environ.get('HTTP_X_SCRIPT_NAME', '') or self.script_name
+        if script_name:
+            environ['SCRIPT_NAME'] = script_name
+            path_info = environ['PATH_INFO']
+            if path_info.startswith(script_name):
+                environ['PATH_INFO_OLD'] = path_info
+                environ['PATH_INFO'] = path_info[len(script_name):]
+        scheme = environ.get('HTTP_X_SCHEME', '') or self.scheme
+        if scheme:
+            environ['wsgi.url_scheme'] = scheme
+        server = environ.get('HTTP_X_FORWARDED_SERVER', '') or self.server
+        if server:
+            environ['HTTP_HOST'] = server
+        return self.app(environ, start_response)
diff --git a/examples/openapi3/reverseproxy/README.rst b/examples/openapi3/reverseproxy/README.rst
index 274600eef..e1bc29334 100644
--- a/examples/openapi3/reverseproxy/README.rst
+++ b/examples/openapi3/reverseproxy/README.rst
@@ -4,6 +4,8 @@ Reverse Proxy Example
 
 This example demonstrates how to run a connexion application behind a path-altering reverse proxy.
 
+You can either set the path in your app, or set the ``X-Script-Name`` header.
+
 Running:
 
 .. code-block:: bash
@@ -12,3 +14,45 @@ Running:
     $ ./app.py
 
 Now open your browser and go to http://localhost:8080/reverse_proxied/ui/ to see the Swagger UI.
+
+
+You can also use the ``X-Script-Name`` header to modify the reverse proxy path.
+For example:
+
+.. code-block:: bash
+
+    curl -H "X-Script-Name: banana" http://localhost:8080/openapi.json
+
+    {
+       "servers" : [
+          {
+             "url" : "banana"
+          }
+       ],
+       "paths" : {
+          "/hello" : {
+             "get" : {
+                "responses" : {
+                   "200" : {
+                      "description" : "hello",
+                      "content" : {
+                         "text/plain" : {
+                            "schema" : {
+                               "type" : "string"
+                            }
+                         }
+                      }
+                   }
+                },
+                "operationId" : "app.hello",
+                "summary" : "say hi"
+             }
+          }
+       },
+       "openapi" : "3.0.0",
+       "info" : {
+          "version" : "1.0",
+          "title" : "Path-Altering Reverse Proxy Example"
+       }
+    }
+