2014-08-04 21:22 GMT+04:00 <[email protected]>:
> Author: markt
> Date: Mon Aug 4 17:22:01 2014
> New Revision: 1615697
>
> URL: http://svn.apache.org/r1615697
> Log:
> When the gzip option is enabled for the DefaultServlet ensure that a suitable
> Vary header is returned for resources that might be returned directly in
> compressed form.
>
> Modified:
> tomcat/trunk/java/org/apache/catalina/servlets/DefaultServlet.java
> tomcat/trunk/webapps/docs/changelog.xml
>
> Modified: tomcat/trunk/java/org/apache/catalina/servlets/DefaultServlet.java
> URL:
> http://svn.apache.org/viewvc/tomcat/trunk/java/org/apache/catalina/servlets/DefaultServlet.java?rev=1615697&r1=1615696&r2=1615697&view=diff
> ==============================================================================
> --- tomcat/trunk/java/org/apache/catalina/servlets/DefaultServlet.java
> (original)
> +++ tomcat/trunk/java/org/apache/catalina/servlets/DefaultServlet.java Mon
> Aug 4 17:22:01 2014
> @@ -799,16 +799,15 @@ public class DefaultServlet extends Http
>
> // Serve a gzipped version of the file if present
> boolean usingGzippedVersion = false;
> - if (gzip &&
> - resource.isFile() &&
> - !included &&
1). I do get why "!included" check was moved to the place below. I
think it should not be moved.
I think that "included" flag does not depend on "accept-encoding"
value sent by user.
2). There may already be a Vary header in the response.
RFC 7230 Chapter 3.2.2. Field Order
[quote]
A sender MUST NOT generate multiple header fields with the same field
name in a message unless either the entire field value for that
header field is defined as a comma-separated list [i.e., #(values)]
or the header field is a well-known exception (as noted below).
[/quote]
The well-known exception referenced above is "Set-Cookie" header.
RFC 7231 Chapter 7.1.4. Vary
defines the field as
Vary = "*" / 1#field-name
so it is an alternative between "*" versus a list of values, so the
above requirement for allowing multiple headers is not met.
3) The code may check response.isCommitted(). (In other words, that
addHeader("Content-Encoding", "gzip")
call has been successful).
Best regards,
Konstantin Kolinko
> - !path.endsWith(".gz") &&
> - checkIfGzip(request)) {
> + if (gzip && resource.isFile() && !path.endsWith(".gz")) {
> WebResource gzipResource = resources.getResource(path + ".gz");
> if (gzipResource.exists() && gzipResource.isFile()) {
> - response.addHeader("Content-Encoding", "gzip");
> - resource = gzipResource;
> - usingGzippedVersion = true;
> + response.addHeader("Vary", "accept-encoding");
> + if (!included && checkIfGzip(request)) {
> + response.addHeader("Content-Encoding", "gzip");
> + resource = gzipResource;
> + usingGzippedVersion = true;
> + }
> }
> }
>
>
> Modified: tomcat/trunk/webapps/docs/changelog.xml
> URL:
> http://svn.apache.org/viewvc/tomcat/trunk/webapps/docs/changelog.xml?rev=1615697&r1=1615696&r2=1615697&view=diff
> ==============================================================================
> --- tomcat/trunk/webapps/docs/changelog.xml (original)
> +++ tomcat/trunk/webapps/docs/changelog.xml Mon Aug 4 17:22:01 2014
> @@ -80,6 +80,12 @@
> and it need not be fatal when the Realm starts. Based on a patch by
> Cédric Couralet. (markt)
> </fix>
> + <fix>
> + When the <code>gzip</code> option is enabled for the
> + <code>DefaultServlet</code> ensure that a suitable <code>Vary</code>
> + header is returned for resources that might be returned directly in
> + compressed form.
> + </fix>
> </changelog>
> </subsection>
> <subsection name="Coyote">
>
>
>
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