Conditional request not honored in Includes

问题

I'm trying to dynamically concatenate a bunch of javascript files into a single file using the INCLUDE filter. The include.shtml.js test script is

<!--#include virtual="/static/script2.js" -->
<!--#include virtual="/static/script1.js" -->

The virtual server config has both SSIETag and SSILastModified set to On for that file

<VirtualHost *:80>

    ServerName test.dkt
    ServerAlias test.com
    UseCanonicalName Off
    ErrorLog logs/test.dkt-error_log
    CustomLog logs/test.dkt-access_log combined
    LogLevel info
    FileEtag All
    AddType application/javascript .js

    DocumentRoot /var/www/html/test.com
    <Directory /var/www/html/test.com>
        Options -Indexes
        ExpiresActive Off
        ExpiresDefault "access plus 1 years"
        Header append Cache-Control "public"
        Order deny,allow
        Allow from all
    </Directory>

    <Directory /var/www/html/test.com/static>
        <FilesMatch "\.shtml\.js$">
            SSIETag On
            SSILastModified On
            Options +Includes
            SetOutputFilter INCLUDES
        </FilesMatch>
    </Directory>

</VirtualHost>

It correctly serves the concatenated scripts but is always a full 200 OK in instead of a 304 Not Modified. The Firebug log

Response Headers
HTTP/1.1 200 OK
Date: Fri, 24 Jan 2014 16:57:12 GMT
Server: Apache/2.2.15 (CentOS)
Last-Modified: Fri, 24 Jan 2014 16:53:32 GMT
Etag: "460bbc-5c-4f0ba32b7447d"
Accept-Ranges: bytes
Vary: Accept-Encoding
Content-Encoding: gzip
Cache-Control: public
Content-Length: 40
Connection: close
Content-Type: application/javascript

Request Headers
GET /static/include.shtml.js HTTP/1.1
Host: test.dkt
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:26.0) Gecko/20100101 Firefox/26.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: pt-br,en-us;q=0.9,es;q=0.7,en;q=0.6,zh-tw;q=0.4,ar-sa;q=0.3,ar;q=0.1
Accept-Encoding: gzip, deflate
DNT: 1
Connection: keep-alive
If-Modified-Since: Fri, 24 Jan 2014 16:53:32 GMT
If-None-Match: "460bbc-5c-4f0ba32b7447d"
Cache-Control: max-age=0

Is there a hard coded restriction on conditional requests for the INCLUDE filter?

I'm aware that I should "touch" the including script whenever there is a change in any of the included scripts. The Apache version is 2.2 running in Centos 6

EDIT

Using the @covener answer I made it work setting the group execute permission of the file and adding the XBitHack full directive

回答1:

Even though you've opted into the etags, it seems you need to separately enable xbithack to allow a 304 to be generated (ap_meets_conditions in the core checks no_local_copy flag referenced in mod_include

http://httpd.apache.org/docs/current/mod/mod_include.html#xbithack

/* When our xbithack value isn't set to full or our platform isn't
 * providing group-level protection bits or our group-level bits do not
 * have group-execite on, we will set the no_local_copy value to 1 so
 * that we will not send 304s.
 */
if ((conf->xbithack != XBITHACK_FULL)
    || !(f->r->finfo.valid & APR_FINFO_GPROT)
    || !(f->r->finfo.protection & APR_GEXECUTE)) {
    f->r->no_local_copy = 1;
}

来源：https://stackoverflow.com/questions/21338450/conditional-request-not-honored-in-includes

标签

apache

http

include

etag