spam filter captcha redirect incorrect when not installed at root

[michaelc@…]

Upon successful captcha match, the captcha_redirect value is matched directly against request handlers to match the appropriate redirect. For projects where Trac is not installed at the root level (i.e. ​https://mydomain.com/trac/myproject), the handlers do not match because the PATH_INFO includes the base url (i.e. /trac/myproject/newticket).

Stripping SCRIPT_NAME if it is present and not '/' should prevent this from happening. We are using the following patch:

Index: tracspamfilter/captcha/api.py
===================================================================
--- tracspamfilter/captcha/api.py	(revision 9965)
+++ tracspamfilter/captcha/api.py	(working copy)
@@ -93,6 +93,8 @@
         if(req.path_info == '/captcha' and req.method == 'POST' and
         req.args['captcha_response'] == req.session['captcha_expected']):
             req.environ['PATH_INFO'] = req.session.get('captcha_redirect', req.href())
+            if ('SCRIPT_NAME' in req.environ and len(req.environ['SCRIPT_NAME']) > 1):
+                req.environ['PATH_INFO'] = req.environ['PATH_INFO'].replace(req.environ['SCRIPT_NAME'], '')
             del req.session['captcha_redirect']
             del req.session['captcha_reject_reason']
             req.session['captcha_verified'] = int(time.time())

[dstoecker]

In r9993.