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

[Jun Omae]

#14248 was closed as duplicate.

[anonymous]

Replying to Jun Omae:

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

For me it happens for an authenticated user. I am using http authorization. This is in the trac log:

2023-10-17 08:55:32,575 Trac[main] ERROR: [10.4.81.11] Internal Server Error: <RequestWithSession "GET '/wiki/WikiStart?format=pdfpage'">, referrer 'http://10.2.10.40/systems/wiki'
Traceback (most recent call last):
  File "/usr/lib/python3.11/site-packages/Trac-1.5.4.dev0-py3.11.egg/trac/web/main.py", line 610, in dispatch_request
    dispatcher.dispatch(req)
  File "/usr/lib/python3.11/site-packages/Trac-1.5.4.dev0-py3.11.egg/trac/web/main.py", line 302, in dispatch
    raise e
  File "/usr/lib/python3.11/site-packages/Trac-1.5.4.dev0-py3.11.egg/trac/web/main.py", line 248, in dispatch
    resp = chosen_handler.process_request(req)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/Trac-1.5.4.dev0-py3.11.egg/trac/wiki/web_ui.py", line 184, in process_request
    Mimeview(self.env).send_converted(req, 'text/x-trac-wiki',
  File "/usr/lib/python3.11/site-packages/Trac-1.5.4.dev0-py3.11.egg/trac/mimeview/api.py", line 1039, in send_converted
    content, output_type, ext = self.convert_content(req, in_type, content, 
                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
  File "/usr/lib/python3.11/site-packages/Trac-1.5.4.dev0-py3.11.egg/trac/mimeview/api.py", line 712, in convert_content
    output = conversion.converter.convert_content(req, mimetype, 
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
  File "/usr/lib/python3.11/site-packages/TracWikiPrint-4.0.0.dev0-py3.11.egg/tracpdf/wikiprint.py", line 218, in convert_content
    pdfoptions = self.prepare_pdf_options(req, pagename)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
  File "/usr/lib/python3.11/site-packages/TracWikiPrint-4.0.0.dev0-py3.11.egg/tracpdf/wikiprint.py", line 261, in prepare_pdf_options
    ('trac_auth', req.incookie['trac_auth'].value),
                  ~~~~~~~~~~~~^^^^^^^^^^^^^
KeyError: 'trac_auth'

[Jun Omae]

Replying to anonymous:

For me it happens for an authenticated user. I am using http authorization. This is in the trac log:

...
  File "/usr/lib/python3.11/site-packages/TracWikiPrint-4.0.0.dev0-py3.11.egg/tracpdf/wikiprint.py", line 261, in prepare_pdf_options
    ('trac_auth', req.incookie['trac_auth'].value),
                  ~~~~~~~~~~~~^^^^^^^^^^^^^
KeyError: 'trac_auth'

Try the following patch (untested):

tracpdf/wikiprint.py

@@ -23 +23 @@
 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+import base64
 import re
 from pdfkit import from_url
 from trac.env import Component, implements
@@ -257 +258 @@
             'encoding': "UTF-8",
             'outline': None,
             'title': req.args.get('pdftitle') or self.pdftitle or pagename,
-            'cookie': [
-                ('trac_auth', req.incookie['trac_auth'].value),
-            ]
         }
+
+        for name in ('trac_auth', 'trac_session'):
+            if name in req.incookie:
+                options['cookie'] = [(name, req.incookie[name].value)]
+                break
+
+        authorization = (req.get_header('Authorization') or '').split()
+        if len(authorization) == 2 and authorization[0].lower() == 'basic':
+            try:
+                creds = base64.b64decode(authorization[1])
+            except:
+                pass
+            else:
+                creds = creds.split(b':', 1)
+                if len(creds) == 2:
+                    options['username'] = to_unicode(creds[0])
+                    options['password'] = to_unicode(creds[1])
+
         self._add_footer(options, pagename, req.args.get('footertext'))
         return options
 

[anonymous]

Replying to Jun Omae:

Try the following patch (untested):

I have done that patch, and I now get this:

OSError: No wkhtmltopdf executable found: "b''"
If this file exists please check that this process can read it or you can pass path to it manually in method call, check README. Otherwise please install wkhtmltopdf - https://github.com/JazzCore/python-pdfkit/wiki/Installing-wkhtmltopdf

I am installing via python3 setup.py install in the trunk directory. The install instructions are rather unclear on that point. If installing that way, what other things (and from where) need to be installed? In the source tree is xhtml2pdf, not wkhtmltopdf.

[anonymous]

Replying to anonymous:

I have done that patch, and I now get this:

OSError: No wkhtmltopdf executable found: "b''"
If this file exists please check that this process can read it or you can pass path to it manually in method call, check README. Otherwise please install wkhtmltopdf - https://github.com/JazzCore/python-pdfkit/wiki/Installing-wkhtmltopdf

I see that wkhtmltopdf is a binary to install. I am sorting that out for my platform (openSUSE Tumbleweed Linux). Stay tuned.

[anonymous]

After installing wkhtmltopdf, I get this:

OSError: wkhtmltopdf reported an error:
Exit with code 1 due to network error: AuthenticationRequiredError

I can run the program from the command line.

[Jun Omae]

OSError: wkhtmltopdf reported an error:
Exit with code 1 due to network error: AuthenticationRequiredError

• Dump options for pdfkit (with DEBUG logging level)

           self._add_footer(options, pagename, req.args.get('footertext'))
  +        self.log.debug('options: %r', options)
           return options
  

• Check username and password is in the options variable
• Check whether it is able to generate pdf file from the URL by invoking manually wkhtmltopdf with the options variable.

[anonymous]

Replying to Jun Omae:

OSError: wkhtmltopdf reported an error:
Exit with code 1 due to network error: AuthenticationRequiredError

• Dump options for pdfkit (with DEBUG logging level)

           self._add_footer(options, pagename, req.args.get('footertext'))
  +        self.log.debug('options: %r', options)
           return options
  

• Check username and password is in the options variable
• Check whether it is able to generate pdf file from the URL by invoking manually wkhtmltopdf with the options variable.

It prints this:

2023-10-20 10:38:52,194 Trac[wikiprint] DEBUG: options: {'page-size': 'A4', 'encoding': 'UTF-8', 'outline': None, 'title': 'WikiStart', 'footer-center': '[page] / [topage]', 'footer-line': None, 'footer-font-size': 10}

So username and password are not in the options.

I'm not familiar with wkhtmltopdf. Exactly how would it be invoked with these options?

[anonymous]

If I print authorization, I get:

2023-10-20 11:21:00,288 Trac[wikiprint] DEBUG: authorization: []

This:

self.log.debug('header: %r', req.get_header('Authorization'))

prints:

2023-10-20 11:23:50,914 Trac[wikiprint] DEBUG: header: None

[Jun Omae]

If I print authorization, I get:

2023-10-20 11:21:00,288 Trac[wikiprint] DEBUG: authorization: []

If you're using mod_wsgi, try to configure ​WSGIPassAuthorization On. If not, please share configurations for web server and the authentications.

[anonymous]

Replying to Jun Omae:

If I print authorization, I get:

2023-10-20 11:21:00,288 Trac[wikiprint] DEBUG: authorization: []

If you're using mod_wsgi, try to configure ​WSGIPassAuthorization On. If not, please share configurations for web server and the authentications.

One step further. I now get this when authentication:

2023-10-23 10:23:22,780 Trac[wikiprint] DEBUG: header: 'Basic cm9nZXI6dmlraW5nOQ=='
2023-10-23 10:23:22,780 Trac[wikiprint] DEBUG: authorization: ['Basic', 'cm9nZXI6dmlraW5nOQ==']
2023-10-23 10:23:22,780 Trac[wikiprint] DEBUG: creds: b'login:secret'

The login and secret are the expected values. When I try to print a wiki page, I now get this:

2023-10-23 10:23:24,096 Trac[main] ERROR: [10.4.86.128] Internal Server Error: <RequestWithSession "GET '/wiki/WikiStart?format=pdfpage'">, referrer 'http://10.2.10.40/systems/wiki'
Traceback (most recent call last):
  File "/usr/lib/python3.11/site-packages/Trac-1.5.4.dev0-py3.11.egg/trac/web/main.py", line 610, in dispatch_request
    dispatcher.dispatch(req)
  File "/usr/lib/python3.11/site-packages/Trac-1.5.4.dev0-py3.11.egg/trac/web/main.py", line 302, in dispatch
    raise e
  File "/usr/lib/python3.11/site-packages/Trac-1.5.4.dev0-py3.11.egg/trac/web/main.py", line 248, in dispatch
    resp = chosen_handler.process_request(req)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/Trac-1.5.4.dev0-py3.11.egg/trac/wiki/web_ui.py", line 184, in process_request
    Mimeview(self.env).send_converted(req, 'text/x-trac-wiki',
  File "/usr/lib/python3.11/site-packages/Trac-1.5.4.dev0-py3.11.egg/trac/mimeview/api.py", line 1039, in send_converted
    content, output_type, ext = self.convert_content(req, in_type, content,
                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/Trac-1.5.4.dev0-py3.11.egg/trac/mimeview/api.py", line 712, in convert_content
    output = conversion.converter.convert_content(req, mimetype,
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/TracWikiPrint-4.0.0.dev0-py3.11.egg/tracpdf/wikiprint.py", line 245, in convert_content
    pdf_page = from_url(page_lst, False, options=pdfoptions, cover=cover_url)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/pdfkit-1.0.0-py3.11.egg/pdfkit/api.py", line 27, in from_url
    return r.to_pdf(output_path)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/pdfkit-1.0.0-py3.11.egg/pdfkit/pdfkit.py", line 201, in to_pdf
    self.handle_error(exit_code, stderr)
  File "/usr/lib/python3.11/site-packages/pdfkit-1.0.0-py3.11.egg/pdfkit/pdfkit.py", line 155, in handle_error
    raise IOError('wkhtmltopdf reported an error:\n' + stderr)
OSError: wkhtmltopdf reported an error:
Exit with code 1 due to network error: UnknownContentError
OSError: wkhtmltopdf reported an error:
Exit with code 1 due to network error: UnknownContentError

[anonymous]

(Sorry about the formatting in the previous comment. I cannot edit the previous comment to correct it...)

[Jun Omae]

That is an issue of wkhtmltopdf. Please report to the wkhtmltopdf project. Also, try to run wkhtmltopdf command manually.

[Jun Omae]

2023-10-20 10:38:52,194 Trac[wikiprint] DEBUG: options: {'page-size': 'A4', 'encoding': 'UTF-8', 'outline': None, 'title': 'WikiStart', 'footer-center': '[page] / [topage]', 'footer-line': None, 'footer-font-size': 10}

I'm not familiar with wkhtmltopdf. Exactly how would it be invoked with these options?

Try to run the wkhtmltopdf command like this (after replacing with correct credentials and URL).

wkhtmltopdf \
  --page-size A4 --encoding UTF-8 --outline --title WikiStart \
  --footer-center '[page] / [topage]' --footer-line --footer-font-size 10 \
  --username login --password secret \
  http://your-hostname/path/to/wiki/WikiStart

[anonymous]

I get this when running the command:

Loading pages (1/6)
Error: Failed to load http://10.2.10.40/systems/chrome/wikiautocomplete/css/jquery.textcomplete.css, with network status code 299 and http status code 500 - Error downloading http://10.2.10.40/systems/chrome/wikiautocomplete/css/jquery.textcomplete.css - server replied: Internal Server Error
Warning: Failed to load http://10.2.10.40/systems/chrome/wikiautocomplete/js/wikiautocomplete.js (ignore)
Error: Failed to load http://10.2.10.40/systems/chrome/wikiautocomplete/js/jquery.textcomplete.min.js, with network status code 299 and http status code 500 - Error downloading http://10.2.10.40/systems/chrome/wikiautocomplete/js/jquery.textcomplete.min.js - server replied: Internal Server Error
Counting pages (2/6)                                               
Resolving links (4/6)                                                       
Loading headers and footers (5/6)                                           
Printing pages (6/6)
Done                                                                      
Exit with code 1 due to network error: UnknownContentError

[anonymous]

I should add that the generated PDF had the wiki page. So perhaps the error is not fatal? No idea.

[Jun Omae]

I should add that the generated PDF had the wiki page. So perhaps the error is not fatal? No idea.

Hm? You got error messages about resources of wikiautocompleteplugin.

Error: Failed to load http://10.2.10.40/systems/chrome/wikiautocomplete/css/jquery.textcomplete.css, with network status code 299 and http status code 500 - Error downloading http://10.2.10.40/systems/chrome/wikiautocomplete/css/jquery.textcomplete.css - server replied: Internal Server Error
Warning: Failed to load http://10.2.10.40/systems/chrome/wikiautocomplete/js/wikiautocomplete.js (ignore)
Error: Failed to load http://10.2.10.40/systems/chrome/wikiautocomplete/js/jquery.textcomplete.min.js, with network status code 299 and http status code 500 - Error downloading http://10.2.10.40/systems/chrome/wikiautocomplete/js/jquery.textcomplete.min.js - server replied: Internal Server Error

Check access log and error log of your web server and try to correct configurations of your web server.

[anonymous]

Replying to Jun Omae:

I should add that the generated PDF had the wiki page. So perhaps the error is not fatal? No idea.

Hm? You got error messages about resources of wikiautocompleteplugin. Check access log and error log of your web server and try to correct configurations of your web server.

The autocomplete package is installed. I know this indicates that the problem is not in the WikiPrint plugin. But it is the only component that is complaining about it. I see these components in systems/.egg-cache/TracWikiAutoComplete-1.4-py3.11.egg-tmp/wikiautocomplete/htdocs

Which contains:

.:
total 8
drwxr-xr-x 2 wwwrun www 4096 Oct 17 08:46 css
drwxr-xr-x 2 wwwrun www 4096 Oct 17 08:46 js

./css:
total 4
-rwxr-xr-x 1 wwwrun www 598 Feb 26  2017 jquery.textcomplete.css

./js:
total 28
-rwxr-xr-x 1 wwwrun www 20246 Nov 16  2016 jquery.textcomplete.min.js
-rwxr-xr-x 1 wwwrun www  5163 Feb 13  2021 wikiautocomplete.js

Is this where it would be searched for? I just did a straight forward install of this plugin with python3 ./setup.py install.

[roger.oberholtzer@…]

I see that the tracautocomplete error is caused by a wikiprint error reported in #14163. When I do that change to wikiprint, the wikiautocomplete complaint goes away.

The error that remains is:

OSError: wkhtmltopdf reported an error:
Exit with code 1 due to network error: UnknownContentError

I will next pursue that.

[roger.oberholtzer@…]

If I run this command:

wkhtmltopdf   --page-size A4 --encoding UTF-8 --outline --title WikiStart   --footer-center '[page] / [topage]' --footer-line --footer-font-size 10   --username me --password secret   http://10.2.10.40/systems/wiki/GPS gps.pdf

I get the expected PDF. But it does not work in Trac on the same page.

When processing, the command prints:

Loading pages (1/6)
Counting pages (2/6)                                               
Resolving links (4/6)                                                       
Loading headers and footers (5/6)                                           
Printing pages (6/6)
Done  

No errors or anything.

[Jun Omae]

Retry after applying the following patch:

tracpdf/wikiprint.py

@@ -241 +242 @@
             page_lst.append(req.abs_href('wikiprint', pagename, version=version,
                                      stylepage=stylepage, filterwiki=filterwiki))
         # Now call pdfkit without a file name so it returns the PDF.
-        pdf_page = from_url(page_lst, False, options=pdfoptions, cover=cover_url)
+        pdf_page = from_url(page_lst, False, options=pdfoptions, cover=cover_url, verbose=True)
 
         return pdf_page, 'application/pdf'
 

According to source code of pdfkit, wkhtmltopdf sometimes exits with non-zero and pdfkit ignores non-zero exit code when second last line of the stderr is Done.

        # Sometimes wkhtmltopdf will exit with non-zero
        # even if it finishes generation.
        # If will display 'Done' in the second last line
        if len(stderr_lines) > 1 and stderr.splitlines()[-2].strip() == 'Done':
            return

at ​https://github.com/JazzCore/python-pdfkit/blob/1.0.0/pdfkit/pdfkit.py#L142-L146

However, the stderr should be empty because --quiet option is used by default since pdfkit 1.0.0.

        if not self.verbose:
            self.options.update({'--quiet': ''})

at ​https://github.com/JazzCore/python-pdfkit/blob/1.0.0/pdfkit/pdfkit.py#L93-L94

If the issue is not fixed by the patch, please report to pdfkit and/or wkhtmlpdf project. That is not an issue of the plugin.

[anonymous]

The verbose=True seems to have fixed the problem. I now get a PDF page. Thanks for your help!

[Jun Omae]

In 18612:

TracWikiPrintPlugin 4.0.0dev: fix exception raised when downloading pdf from anonymous users and users with basic authentication, and adapt to pdfkit 1.0.0 (closes #14087)