https://bz.apache.org/bugzilla/show_bug.cgi?id=69775
Bug ID: 69775
Summary: Content-Type seems to be required in type-map, but
that's not documented
Product: Apache httpd-2
Version: 2.4.65
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P2
Component: mod_negotiation
Assignee: bugs@httpd.apache.org
Reporter: da...@mandelberg.org
Target Milestone: ---
I'm trying to use mod_negotiation type-map files to serve pre-compressed files.
>From the documentation, I'd expect to just use Content-Encoding to negotiate
which file to serve, but that doesn't work.
For the following minimal reproduction cases, I'm using this .htaccess file:
```
AddHandler type-map .var
AddEncoding gzip .gz
AddType text/plain .txt
```
With some text in foo.txt, that compressed in foo.txt.gz, and the code below in
foo.txt.var, a request for foo.txt.var returns 406 with only foo.txt.gz as an
option.
```
URI: foo.txt.var
URI: foo.txt
Content-Encoding: gzip
URI: foo.txt.gz
```
With this file, I get 406 with both foo.txt and foo.txt.gz listed:
```
URI: foo.txt.var
Content-Encoding: identity
URI: foo.txt
Content-Encoding: gzip
URI: foo.txt.gz
```
With this, 406 with just foo.txt.gz:
```
URI: foo.txt.var
Description: uncompressed
URI: foo.txt
Content-Encoding: gzip
URI: foo.txt.gz
```
By adding Content-Type, it looks like it works for normal requests.
```
URI: foo.txt.var
Content-Type: text/plain
URI: foo.txt
Content-Encoding: gzip
Content-Type: text/plain
URI: foo.txt.gz
```
However, if I send a request with `Accept: text/html`, I get a 406. On the one
hand, that makes sense since all of the variants have a Content-Type that does
not match text/html. But on the other hand, it really doesn't make sense when
all I'm trying to negotiate is the Content-Encoding, not the Content-Type.
Is it intentional that Content-Type is required to be negotiated? If so, could
https://httpd.apache.org/docs/current/mod/mod_negotiation.html#typemaps be
updated to document that? If not, then I think there's a bug, or maybe I just
can't figure out how to negotiate Content-Encoding without also negotiating
Content-Type.
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