Missing 'trac_auth' cookie in request

[thekk@…]

After installing the plugin, trying to print a wiki page results in a KeyError: 'trac_auth'.

Systeminformation:

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:94.0) Gecko/20100101 Firefox/94.0
Paket	Version
Trac 	1.4.1
Babel 	2.8.0
Docutils 	0.16
Genshi 	0.7.3 (with speedups)
Jinja2 	2.11.2
mod_python 	3.3.1
MySQL 	server: "5.7.21-1ubuntu1", client: "0.9.3", thread-safe: True
Pygments 	2.5.2
pymysql 	0.9.3
Python 	2.7.18 (default, Mar 8 2021, 13:02:45) [GCC 9.3.0]
pytz 	2020.1
setuptools 	44.1.0
Subversion 	1.13.0 (r1867053)
Textile 	3.0.4
jQuery	1.12.4
jQuery UI	1.12.1
jQuery Timepicker	1.6.3
Installierte Plugins
Name 	Version 	Ort
TracCsvPlugin 	0.0.1 	/usr/local/lib/python2.7/dist-packages/TracCsvPlugin-0.0.1-py2.7.egg
TracDragDrop 	0.12.0.15 	/usr/local/lib/python2.7/dist-packages/TracDragDrop-0.12.0.15-py2.7.egg
TracNav 	4.1 	/usr/local/lib/python2.7/dist-packages
TracPdfPreview 	0.1.2 	/usr/local/lib/python2.7/dist-packages
TracPlantUml 	2.3 	/usr/local/lib/python2.7/dist-packages
TracTags 	0.12.dev0 	/usr/local/lib/python2.7/dist-packages
TracWikiAutoComplete 	1.4 	/usr/local/lib/python2.7/dist-packages/TracWikiAutoComplete-1.4-py2.7.egg
TracWikiExtras 	1.3.1 	/usr/local/lib/python2.7/dist-packages
TracWikiPrint 	4.0.0.dev0 	/usr/local/lib/python2.7/dist-packages/TracWikiPrint-4.0.0.dev0-py2.7.egg
TracXMLRPC 	1.1.9.dev0 	/usr/local/lib/python2.7/dist-packages

[anonymous]

See attachement.

[Jun Omae]

The error is raised from TracWikiPrintPlugin.

[free4fan]

Hi, I have the same issue as his. Moreover, this issue has been appeared when I use Ldap authentication and authorization like that:

        <Location /prt/prj>
          WSGIApplicationGroup %{GLOBAL}
          SSLRequireSSL
          Allow from 10.0.0.0/24
          AuthType Basic
          AuthName "Protected"
          AuthBasicProvider "ldap"
          AuthLDAPURL "ldap://192.168.1.1/dc=example,dc=com?mail?sub?(&(objectClass=*)(accountstatus=active)(mail=*@example.com))"
          AuthLDAPBindDN "cn=manager,dc=example,dc=com"
          AuthLDAPBindPassword "password"
          Require valid-user
        </Location>

</VirtualHost>

but when I use another configuration everything is alright

    <Location /pub/prj>
        SSLRequireSSL
        WSGIApplicationGroup %{GLOBAL}
    </Location>
    <LocationMatch /pub/prj/[[:alnum:]_]+/login>
          Allow from 10.0.0.0/24
          AuthType Basic
          AuthName "Public area"
          AuthBasicProvider "ldap"
          AuthLDAPURL "ldap://192.168.1.1/dc=example,dc=com?mail?sub?(&(objectClass=*)(accountstatus=active)(mail=*@example.com))"
          AuthLDAPBindDN "cn=manager,dc=example,dc=com"
          AuthLDAPBindPassword "password"
          Require valid-user
    </LocationMatch>

These options are very different. The former requires authorization before the user can access the protected area, the latter has access for anonymous users and the user can log in with their username and password.

---

Python Traceback

Most recent call last:
File "/usr/local/lib/python2.7/dist-packages/trac/web/main.py", line 639, in dispatch_request          
  dispatcher.dispatch(req)
File "/usr/local/lib/python2.7/dist-packages/trac/web/main.py", line 250, in dispatch          
  resp = chosen_handler.process_request(req)
File "/usr/local/lib/python2.7/dist-packages/trac/wiki/web_ui.py", line 186, in process_request          
  format, versioned_page.name)
File "/usr/local/lib/python2.7/dist-packages/trac/mimeview/api.py", line 1020, in send_converted          
  iterable=iterable)
File "/usr/local/lib/python2.7/dist-packages/trac/mimeview/api.py", line 705, in convert_content          
  conversion.key)
File "/usr/local/lib/python2.7/dist-packages/tracpdf/wikiprint.py", line 218, in convert_content          
  pdfoptions = self.prepare_pdf_options(req, pagename)
File "/usr/local/lib/python2.7/dist-packages/tracpdf/wikiprint.py", line 261, in prepare_pdf_options          
  ('trac_auth', req.incookie['trac_auth'].value),

---

my system info

System Information
User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.5060.114 Safari/537.36 Edg/103.0.1264.49

Package	Version
Trac	1.4.3
Genshi	0.7.3 (with speedups)
Jinja2	2.11.3
mod_wsgi	4.3.0 (WSGIProcessGroup wsgitrac_protected WSGIApplicationGroup %{GLOBAL})
pysqlite	2.6.0
Python	2.7.12 (default, Mar 1 2021, 11:38:31) [GCC 5.4.0 20160609]
setuptools	20.7.0
SQLite	3.11.0
Subversion	1.9.3 (r1718519)
jQuery	1.12.4
jQuery UI	1.12.1
jQuery Timepicker	1.6.3
Installed Plugins
Name	Version	Location
TracArchiveViewer	0.3.dev0	/usr/local/lib/python2.7/dist-packages/TracArchiveViewer-0.3.dev0-py2.7.egg
TracBookmark	1.0.2	/usr/local/lib/python2.7/dist-packages/TracBookmark-1.0.2-py2.7.egg
TracWikiPrint	4.0.0.dev0	/usr/local/lib/python2.7/dist-packages

[figaro]

Ticket #14156 was closed as a duplicate.

[Jun Omae]

The issue occurs when an anonymous user clicks PDF Page download link. It doesn't when an authenticated user clicks the link.

tracpdf/wikiprint.py

@@ -252 +252 @@
         :param pagename: name of the current wiki page
         :return: dict with wkhtmltopdf global options
         """
+        for name in ('trac_auth', 'trac_session'):
+            if name in req.incookie:
+                cookie = [(name, req.incookie[name].value)]
+                break
+        else:
+            cookie = []
         options = {
             'page-size': req.args.get('pagesize') or self.pagesize,
             'encoding': "UTF-8",
             'outline': None,
             'title': req.args.get('pdftitle') or self.pdftitle or pagename,
-            'cookie': [
-                ('trac_auth', req.incookie['trac_auth'].value),
-            ]
+            'cookie': cookie,
         }
         self._add_footer(options, pagename, req.args.get('footertext'))
         return options