Use the right environment variables.

copyvios/cookies.py

@@ -9,7 +9,7 @@ class _CookieManager(SimpleCookie):
     MAGIC = "--cpv2"
 
     def __init__(self, environ):
-        self._path = path.split(environ["PATH_INFO"])[0]
+        self._path = path.dirname(environ["SCRIPT_NAME"])
         try:
             super(_CookieManager, self).__init__(environ["HTTP_COOKIE"])
         except (CookieError, KeyError):

pages/index.mako

@@ -18,7 +18,7 @@
             % endif
             <p>This tool attempts to detect <a href="//en.wikipedia.org/wiki/WP:COPYVIO">copyright violations</a> in articles. Simply give the title of the page you want to check and hit Submit. The tool will then search for its content elsewhere on the web and display a report if a similar webpage is found. If you also provide a URL, it will not query any search engines and instead display a report comparing the article to that particular webpage, like the <a href="//toolserver.org/~dcoetzee/duplicationdetector/">Duplication Detector</a>. Check out the <a href="//en.wikipedia.org/wiki/User:EarwigBot/Copyvios/FAQ">FAQ</a> for more information and technical details.</p>
             <p><i>Note:</i> The tool is still in beta. You are completely welcome to use it and provide <a href="//en.wikipedia.org/wiki/User_talk:The_Earwig">feedback</a>, but be aware that it may produce strange or broken results.</p>
-            <form action="${environ['PATH_INFO']}" method="get">
+            <form action="${environ['SCRIPT_URL']}" method="get">
                 <table>
                     <tr>
                         <td>Site:</td>

pages/settings.mako

@@ -9,7 +9,7 @@
             % endif
             <h1>Settings</h1>
             <p>This page contains some configurable options for the copyvio detector. Settings are saved as cookies. You can view and delete all cookies generated by this site at the bottom of this page.</p>
-            <form action="${environ['PATH_INFO']}" method="post">
+            <form action="${environ['SCRIPT_URL']}" method="post">
                 <table>
                     <tr>
                         <td>Default site:</td>
@@ -86,7 +86,7 @@
                             <td><span class="mono">${cookie.value | h}</span></td>
                         % endtry
                         <td>
-                            <form action="${environ['PATH_INFO']}" method="post">
+                            <form action="${environ['SCRIPT_URL']}" method="post">
                                 <input type="hidden" name="action" value="delete">
                                 <input type="hidden" name="cookie" value="${key | h}">
                                 <button type="submit">Delete</button>
@@ -96,7 +96,7 @@
                 % endfor
                     <tr>
                         <td>
-                            <form action="${environ['PATH_INFO']}" method="post">
+                            <form action="${environ['SCRIPT_URL']}" method="post">
                                 <input type="hidden" name="action" value="delete">
                                 <input type="hidden" name="all" value="1">
                                 <button type="submit">Delete all</button>