https://bz.apache.org/bugzilla/show_bug.cgi?id=64339
Bug ID: 64339
Summary: mod_proxy_html changing docx header / file content,
leading to corrupt documents
Product: Apache httpd-2
Version: 2.4.6
Hardware: PC
OS: Linux
Status: NEW
Severity: major
Priority: P2
Component: mod_proxy_html
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
Have been banging my head against the wall for hours. Seems like mod_proxy_html
changes the header of a docx file served by the proxy, based on extension. I am
serving nextcloud over a proxy (vm serving nextcloud over http, load balancer
doing httpS, both apache)
Broken:
$ curl -s "https://cloud.domain.nl/oowriter.docx"; | xxd | head -n2
00000000: 504b 0304 1400 0808 0800 66c2 92c2 8a50 PK........f....P
00000010: 0000 0000 0000 0000 0000 0000 0b00 0000 ................
(Identified by `file` as "oowriter.docx.1: Zip archive data, at least v2.0 to
extract")
Working, same file, just different extension:
$ curl -s "https://cloud.domain.nl/oowriter.XXX"; | xxd | head -n2
00000000: 504b 0304 1400 0808 0800 6692 8a50 0000 PK........f..P..
00000010: 0000 0000 0000 0000 0000 0b00 0000 5f72 .............._r
(identified by `file` as "oowriter.XXX: Microsoft Word 2007+")
That is the gist of it. My setup:
[ User ] -- https --> [ Load balancer ] -- http --> [ Nextcloud VM ]
Load balancer is Apache/2.4.6 (CentOS) , running on CentOS 7.7.1908
Nextcloud VM is Apache/2.4.6 (CentOS) (same)
Load balancer host config:
------------------------------------------------------------------
<IfModule mod_ssl.c>
<VirtualHost *:443>
SSLEngine off
ServerAdmin [email protected]
ServerName cloud.domain.nl
# ServerAlias www.domain.nl
DocumentRoot "/var/www/html/"
ErrorLog "/var/log/httpd/error_cloud_domain_nl.log"
CustomLog /var/log/httpd/access_cloud_domain_nl.log combined
SSLCertificateFile /etc/letsencrypt/live/cloud.domain.nl/cert.pem
SSLCertificateKeyFile /etc/letsencrypt/live/cloud.domain.nl/privkey.pem
Include /etc/letsencrypt/options-ssl-apache.conf
SSLCertificateChainFile /etc/letsencrypt/live/cloud.domain.nl/chain.pem
ProxyHTMLEnable On
ProxyHTMLInterp On
ProxyPreserveHost Off
ProxyPass / http://10.0.40.3:80/
ProxyPassReverse / http://10.0.40.3:80/
ProxyHTMLURLMap http://10.0.40.3:80/ /
<IfModule mod_rewrite.c>
RewriteEngine on
RewriteRule ^/\.well-known/host-meta /public.php?service=host-meta [QSA,L]
RewriteRule ^/\.well-known/host-meta\.json /public.php?service=host-meta-json
[QSA,L]
RewriteRule ^/\.well-known/webfinger /public.php?service=webfinger [QSA,L]
RewriteRule ^/\.well-known/carddav /remote.php/dav/ [R=301,L]
RewriteRule ^/\.well-known/caldav /remote.php/dav/ [R=301,L]
</IfModule>
</VirtualHost>
</IfModule>
------------------------------------------------------------------
For the NextCloud, this is just nextcloud being served from /var/www/html
(default document root). Serving http. Nothing special.
Now the question is what changes my docx file in transit, where does it happen,
why does it happen, and how do I fix it.
Help appreciated. Thx
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