feat(router): establish shared router/view/controller global variables

- add ssl warning

src/httpaste/__init__.py

@@ -152,6 +152,7 @@ from httpaste.model import Config as ModelConfig
 from httpaste.backend import get_backend_config
 from httpaste.backend import Config as BackendConfig
 from httpaste.helper.config import get_configparser, CONFIGPATH_ENVIRON
+from httpaste.helper.url import url_upgrade_to_https
 from httpaste.helper.http import (
     BadRequestError,
     ForbiddenError,
@@ -238,6 +239,22 @@ def get_flask_app(config: Config) -> FlaskApp:
             response.headers['WWW-Authenticate'] = 'Basic realm="private"'
         return response
 
+    @application.app.before_request
+    def before_request_func():
+        from flask import request
+
+        request._view = {}
+
+        if config.server.request_ssl:
+
+            https_url = url_upgrade_to_https(request.url, config.server.ssl_port)
+
+            if https_url != request.url:
+
+                print('Hallo')
+
+                request._view['before_request__ssl_url'] = https_url
+
     return application
 
 

src/httpaste/controller/ui/__init__.py

@@ -1,6 +1,8 @@
-from httpaste.helper.template import views
+from httpaste.helper.template import views, render_template_with_context
 from httpaste import __doc__ as man_page
 
+from flask import current_app
+
 def search(**kwargs):
 
     template = views.get_template("viewport/ui/search.html")
@@ -13,4 +15,7 @@ def search(**kwargs):
         'delete_session_url': '/ui/user/session/delete'
     }
 
-    return template.render(**variables), 200
+    with current_app.app_context():
+        view_render = render_template_with_context(template, **variables)
+
+    return view_render, 200

src/httpaste/controller/ui/paste/__init__.py

@@ -2,8 +2,9 @@ from io import BytesIO
 from base64 import b64encode
 
 from connexion import request
+from flask import current_app
 
-from httpaste.helper.template import views
+from httpaste.helper.template import views, render_template_with_context
 from httpaste.helper.url import url_query_string, url_append_query_param
 from httpaste.helper.syntax import syntax_shortnames, format_shortnames
 from httpaste.helper.http import mime_types
@@ -23,7 +24,10 @@ def search(**kwargs):
         'delete_session_url': '/ui/user/session/delete'
     }
 
-    return template.render(**variables), 200
+    with current_app.app_context():
+        view_render = render_template_with_context(template, **variables)
+
+    return view_render, 200
 
 
 def post(**kwargs):
@@ -93,4 +97,7 @@ def get(**kwargs):
         'mime_types': mime_types()
     }
 
-    return template.render(**variables)
+    with current_app.app_context():
+        view_render = render_template_with_context(template, **variables)
+
+    return view_render, 200

src/httpaste/controller/ui/paste/private.py

@@ -1,4 +1,6 @@
-from httpaste.helper.template import views
+from flask import current_app
+
+from httpaste.helper.template import views, render_template_with_context
 from httpaste.controller.ui.paste import post as post_proxy
 from httpaste.controller.ui.paste import get as get_proxy
 
@@ -8,10 +10,12 @@ def search(**kwargs):
 
     variables = {
         'paste_form_url': '/ui/paste/private',
-        'user': kwargs.get('user')
     }
 
-    return template.render(**variables), 200
+    with current_app.app_context():
+        view_render = render_template_with_context(template, **variables)
+
+    return view_render, 200
 
 
 def post(**kwargs):

src/httpaste/controller/ui/paste/public.py

@@ -1,4 +1,6 @@
-from httpaste.helper.template import views
+from flask import current_app
+
+from httpaste.helper.template import views, render_template_with_context
 from httpaste.controller.ui.paste import post as post_proxy
 from httpaste.controller.ui.paste import get as get_proxy
 
@@ -10,7 +12,10 @@ def search(**kwargs):
         'paste_form_url': '/ui/paste/public'
     }
 
-    return template.render(**variables), 200
+    with current_app.app_context():
+        view_render = render_template_with_context(template, **variables)
+
+    return view_render, 200
 
 
 def post(**kwargs):

src/httpaste/controller/ui/user/__init__.py

@@ -1,5 +1,6 @@
-from httpaste.helper.template import views
-from httpaste import __doc__ as man_page
+from flask import current_app
+
+from httpaste.helper.template import views, render_template_with_context
 
 def search(**kwargs):
 
@@ -9,4 +10,7 @@ def search(**kwargs):
         'delete_session_url': '/ui/user/session/delete'
     }
 
-    return template.render(**variables), 200
+    with current_app.app_context():
+        view_render = render_template_with_context(template, **variables)
+
+    return view_render, 200

src/httpaste/controller/ui/user/session/__init__.py

@@ -1,4 +1,4 @@
-from httpaste.helper.template import views
+from httpaste.helper.template import views, render_template_with_context
 from httpaste.controller.user.session import delete as raw_delete
 
 from connexion import request
@@ -7,11 +7,12 @@ def search(**kwargs):
 
     template = views.get_template("viewport/ui/user/session/search.html")
 
-    print(request.path)
-
     variables = {'session_delete_url': request.path + '/delete'}
 
-    return template.render(**variables), 200
+    with current_app.app_context():
+        view_render = render_template_with_context(template, **variables)
+
+    return view_render, 200
 
 
 def delete(**kwargs):

src/httpaste/helper/template.py

@@ -1,6 +1,25 @@
 from jinja2 import Environment, PackageLoader, select_autoescape
+from collections import namedtuple
 
 views = Environment(
     loader=PackageLoader("httpaste", "view"),
     autoescape=select_autoescape()
-)
+)
+
+
+def render_template_with_context(template: object, **kwargs):
+    """render a template with global context variables
+
+        the definition of a global context is abstract, it does neither apply
+        to Flask, nor to Jinja2 and only acts as a bridge for passing
+        variables from flask to jinja2, without having to define them within
+        each controller.
+
+        :param template: jinja2 template object
+    """
+
+    from flask import request
+
+    return template.render(**{**kwargs, **{
+        'flask': namedtuple('Flask', request._view.keys())(**request._view)
+    }})

src/httpaste/helper/url.py

@@ -1,3 +1,4 @@
+from typing import Optional
 from urllib.parse import urlparse, parse_qs
 
 
@@ -18,3 +19,22 @@ def url_append_query_param(url:str, name: str, value:str):
 
     return urlcomps._replace(query=qs).geturl()
 
+
+def url_upgrade_to_https(url: str, port: Optional[int] = 443):
+
+    urlcomps = urlparse(url)
+
+    urlcomps = urlcomps._replace(scheme='https')
+
+    if url != urlcomps.geturl():
+
+        hostname = urlcomps.netloc.rsplit(':', 1)[0]
+
+        if  port != 443:
+            netloc = ':'.join((hostname, str(port)))
+        else:
+            netloc = hostname
+
+        urlcomps = urlcomps._replace(netloc=netloc)
+
+    return urlcomps.geturl()

src/httpaste/server.py

@@ -10,6 +10,8 @@ class Config(NamedTuple):
     """
     swagger_ui: bool = True
     bind_address: str = None
+    request_ssl: bool = True
+    ssl_port: int = 443
 
 
 def get_server_config(configIni: ConfigParser) -> Config:

src/httpaste/view/frame/decorated.html

@@ -15,10 +15,29 @@
                 margin-bottom: 1em;
             }
 
+            .blinking{
+                animation:blinkingText 1.0s infinite;
+                animation-timing-function: step-start;
+            }
+            
+            .warning {
+                color: red;
+            }
+            
+            @keyframes blinkingText {
+                0%{     color: red;    }
+                50%{    color: transparent; }
+                100%{   color: red;    }
+            }
         </style>
     </head>
     <body>
         <header>
+            {% if flask.before_request__ssl_url is defined %}
+            <p>
+            <strong class="blinking warning">WARNING:</strong> Communication not encrypted - SSL/TLS will not be enforced. Visit <a href="{{ flask.before_request__ssl_url }}">{{ flask.before_request__ssl_url }}</a>, for SSL/TLS encryption.
+            </p>
+            {% endif %}
             {% block header %}{% endblock %}
         </header>
         <hr/>