SetEnvIf regex for setting Content-Disposition HTTP header

apache-2.2regex

I am attempting to use the IHS 7.0/apache 2.2 SetEnvIf directive to set the filename of a downloaded file based on a url parameter. I think I am pretty close, however if there is a space (encoded or otherwise) in the filename – it fails.

example url:

http://site.com/path/to/filename.ext/file-title=Nice File Name.ext?file-type=foo

apache config:

SetEnvIf Request_URI "^.*file-title\=(.*)\??.*$" FILENAME=$1
Header unset "Content-Disposition"
Header add "Content-Disposition" "attachment; filename=%{FILENAME}e"
UnsetEnv FILENAME

An application will specify what is now showing up as "Nice File Title.ext" in the example. This all works great if there are no spaces, however – if there is a space the filename to download will just show up as "Nice". There may or may not be a second set of parameters in the query string (?file-type, etc)

Best Answer

ok - so leaving the regex alone and changing the Header add did the trick.

filename=\"%{FILENAME}e\""

to enclose it in quotes. sigh.

Related Solutions

Tomcat – Apache2 – mod_expire and mod_rewrite not working in httpd.conf – serving content from tomcat

Probably the ProxyPass / directive you have in your config routes all requests to the Tomcat backend, bypassing all your mod_rewrite directives. You can try to remove the ProxyPass directive and use RewriteRule with the [P] flag after your other rewrites:

mod_rewrite: P|proxy

For the expire headers the situation is worse — in another similar question a solution was not found.

Option +FollowSymLinks would be needed for using mod_rewrite in .htaccess files; in your case it is not required, because you can put everything in the Apache config. Moving rules from config to .htaccess is pointless and can only make things slower. However, there is an important difference between .htaccess and the Apache config — in .htaccess patterns in RewriteRule are matched against relative filesystem paths (which never start with /), while in the VirtualHost context these patterns are matched against the URL path after the hostname, which always starts with /. Therefore at least one of your rules is incorrect:

RewriteRule ^content/(js|css)/([a-z]+)-([0-9]+)\.(js|css)$ /content/$1/$2.$4

should be

RewriteRule ^/content/(js|css)/([a-z]+)-([0-9]+)\.(js|css)$ /content/$1/$2.$4

(note the additional slash in the beginning).

apache-2.2 – How to Send Content-Disposition Headers in Apache for Files

I have discovered that this does what I want:

<Location /textfiles>
    SetEnvIf Request_URI "^.*/([^/]*)$" FILENAME=$1
    Header set "Content-disposition" "attachment; filename=%{FILENAME}e"
    UnsetEnv FILENAME
</Location>

Best Answer

Related Solutions

Tomcat – Apache2 – mod_expire and mod_rewrite not working in httpd.conf – serving content from tomcat

apache-2.2 – How to Send Content-Disposition Headers in Apache for Files

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