Okay, this is great! Making some real headway here. Your suggestions works as expected. However, I want to throw another spanner in the works :) I have a directory which only contains flac files. I have several bash scripts, each of which convert a flac file to another format (mp3, aac, etc) I've setup various custom filters for each using ExtFilterDefine, and they all work as suggested. Now: I could expand your suggestion of using SetEnvIf to pass through the value of the quality field for each mimetype I want to support. This would be a fine solution, and would work. However, I'm interested in seeing if I can get MultiViews to work with directives provided by mod_filter. It is my understanding that: MultiViewsMatch Filters Would tell Apache to check the mime-types of any attached filters and apply those in order to provide the requested resource. Here is a pseudo-example of what I've configured: ExtFilterDefine Transcode_MP3 mode=output intype=audio/flac outtype=audio/mp3 cmd="flac2mp3" ExtFilterDefine Transcode_AAC mode=output intype=audio/flac outtype=audio/aac cmd="flac2aac" ExtFilterDefine Transcode_MP4 mode=output intype=audio/flac outtype=audio/mp4 cmd="flac2mp4" <Directory /mylib> Options MultiViews MultiViewsMatch Filters FilterProvider Transcode_MP3 ext_filter Content-type audio/mp3 FilterProvider Transcode_AAC ext_filter Content-type audio/aac FilterProvider Transcode_MP4 ext_filter Content-type audio/mp4 FilterChain Transcode_MP3 Transcode_AAC Transcode_MP4 </Directory> Alias /lib /mylib The directory /mylib only contains flac files. So, in theory, I should be able to make the following request: GET /lib/song1 Accept: audio/mp3;q=1,audio/aac;q=0.5 And the process should be: 1) MultiViews fires up and tries to conneg the file. Matches the audio/mp3 type from the Accept header. 2) Matches the file /mylib/song1.flac 3) Passes the file out through the custom filter Transcode_MP3 (flac2mp3 script) 4) Returns song1.mp3 Can anyone give me some advice? My main concerns are regarding the process Apache goes through to accomplish this: 1) The Second parameter of FilterProvider should be the provider-name. In the example above, Apache refuses to start if I use "ext_filter", but replacing it with "Transcode_MP3" lets it start (the thinking is that the provider-name is the custom filter name I have previously setup using ExtFilterDefine, but I think this may be wrong) 2) I think I may have made a incorrect assumption that multiviews will grab the song1.flac file and pass it through to the appropriate filter. Is this correct? If "MultiViewsMatch Filters" is used, will MultiViews pass through the first file that *could* match to the appropriate filter? I couldn't find any further information on what happens with this directive from the Apache 2.2 Documentation. 3) This may seem like a long winded way of doing things, but I am interested in running my custom filter as much like "real" filters as possible, so that in the future I could replace them with properly coded "real" filters :). That and I really want to understand Apache Filters better, and considering Apache source code is way out of my league, custom/script filters are about the best I can cope with. If I can do pretty much everything you can with custom/script filters you can do with "real" filters, that would definitely help my understanding. If you have a better, more in-depth reference for filters (besides the Apache 2.2 Documentation), please send me the link, and I'll quit bothering the list :) Again, thanks for your help so far. Cheers, Ben Ben Davies | Lead Developer | Stickyeyes 6th Floor, West One, Wellington Street, Leeds, LS1 1BA Email: ben.davies@xxxxxxxxxxxxxx 0113 391 2929 | Fax 0113 391 2939 This e-mail may contain information that is privileged, confidential or otherwise protected from disclosure. It must not be used by, or its contents copied or disclosed to persons other than the intended recipient. Any liability (in negligence or otherwise) arising from any third party acting, or refraining from acting, on any information contained in this e-mail is excluded. The views expressed may not be official company policy, but instead, the personal views of the originator. If you have received this e-mail in error please notify the sender and delete the e-mail. -----Original Message----- From: jslive@xxxxxxxxx [mailto:jslive@xxxxxxxxx] On Behalf Of Joshua Slive Sent: 02 June 2008 17:28 To: users@xxxxxxxxxxxxxxxx Subject: Re: AddOutputFilterByType On Mon, Jun 2, 2008 at 11:50 AM, Ben Davies <ben@xxxxxxxxxxxxxx> wrote: > Sorry, I should have been more explicit: > > How would you implement AddOutputFilterByType for filters created with > ExtFilterDefine? > > Example: > > I have a flac file. I have a custom filter that converts flac files to mp3 > files. If the request contains the header Accept: audio/mp3, how can I > ensure that my custom filter will run? > > I had a look at the directives for mod_filter and the closest match appears > to be FilterProvider, but the second argument requires that I specify a > regular filter. mod_ext_filter does create "regular" filters that should be usable in a FilterProvider directive. (Although I have never tried it myself.) Alternatively, mod_ext_filter has its own set of triggers. For example, the AddOutputFilterByType directive can be easily replaced by specifying an intype= argument for your ExtFilterDefine directive. If you really want to match off the Accept request header (rather than imitating AddOutputFilterByType as you initially requested), you can do something like SetEnvIf Accept audio/mp3 accept-mp3 ExtFilterDefine ... enableenv=accept-mp3 Joshua. --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx
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