0006064: Proxy-Cache: "Cache-Control: max-age" Header disappears when (conditional) Redirect Rule is present in web-app

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Category

Severity

Reproducibility

Date Submitted

Last Update

0006064

[Resin]

minor

always

06-22-17 06:15

07-12-17 16:27

Reporter

stbu

View Status

public

Assigned To

ferg

Priority

normal

Resolution

no change required

Platform

Status

closed

Projection

none

OS Version

ETA

none

Fixed in Version

Product Version

4.0.53

Product Build

Summary

0006064: Proxy-Cache: "Cache-Control: max-age" Header disappears when (conditional) Redirect Rule is present in web-app

Description

We're running Resin-Professional in an environment with multiple virtual hosts, several web-apps and many Rewrite Rules.

While trying to add HTTP Caching configuration again to certain web-apps we have observed a problem that when a Rewrite Rule was present, the Cache-Control: max-age=nnn" header was removed.

It was possible to make a simple test web-app with one .png image that should be cached. Resin will add the proper Header when <proxy-cache> and <cache-mapping> is configured, but once a conditional rewrite rule has been added, it's gone.

The Additional information contains further desriptions on how to reproduce the issue.

Steps To Reproduce

Additional Information

Steps to reproduce:

- Downloaded Resin Professional 4.0.53
- cd into resin-pro-4.0.53
- Copy our Pro license into resin-pro-4.0.53/licenses
- Added the following line into resin.xml to add the <proxy-cache> within the <cluster id="app">

Here is the diff between the new resin.xml and the original one:
84,86d83
<
< <proxy-cache path="cache-test" memory-size="256M" disk-size="2G" entries="16384" max-entry-size="2M" enable="true" enable-range="true"/>
<

drop test.war (uploaded to this bug-report) into resin-pro-4.0.53/webapps

Run curl on command line to see the headers of a request to the test web-app's /images/logo.png file:

curl -o /dev/null -s -D - http://localhost:8080/test/images/logo.png [^]

HTTP/1.1 200 OK
Server: Resin/4.0.53
ETag: "409sQeD44+m"
Last-Modified: Thu, 22 Jun 2017 12:27:22 GMT
Accept-Ranges: bytes
Cache-Control: max-age=666
Content-Type: image/png
Content-Length: 5964
Date: Thu, 22 Jun 2017 12:34:39 GMT

==> As you can see there is the "Cache-Control: max-age=666" header returned by Caucho Resin 4.0.53

Now, let's make a simple change in the resin-pro-4.0.53/webapps/test/resin-web.xml file and add the following Redirect Rule (just uncomment it in the file)

  <resin:Redirect regexp="^/" target="http://example.com/"> [^]
    <resin:IfCookie name="DummyIsNotSet"/>
  </resin:Redirect>

Restart Resin or the Web-App and then run curl again:

curl -o /dev/null -s -D - http://localhost:8080/test/images/logo.png [^]

HTTP/1.1 200 OK
Server: Resin/4.0.53
Cache-Control: private
ETag: "409sQeD44+m"
Last-Modified: Thu, 22 Jun 2017 12:27:22 GMT
Accept-Ranges: bytes
Content-Type: image/png
Content-Length: 5964
Date: Thu, 22 Jun 2017 12:47:35 GMT

==> Now, the "Cache-Control: max-age=666" is gone, but the "Cache-Control: private". But this is not enough without either "Expire" or "Cache-Control: max-age".
But the resin-web.xml still contains the "<cache-mapping url-pattern="/*.png" max-age="666"/>" and the Rewrite has not fired.

Attached Files

test.war [^] (7,074 bytes) 06-22-17 06:15

Relationships

Notes
(0006770) ferg 07-12-17 16:27	This is normal behavior. The URL output varies depending on the Cookie header, because of the resin:IfCookie. So, the output can't be cached publicly without a Vary header. (It is cached internally.) You can enable the public caching headers with a resin:SetVary rule. <resin:SetVary regexp="..." value="Cookie"/>

Issue History
Date Modified	Username	Field	Change
06-22-17 06:15	stbu	New Issue
06-22-17 06:15	stbu	File Added: test.war
06-22-17 06:16	stbu	Issue Monitored: stbu
07-12-17 16:27	ferg	Note Added: 0006770
07-12-17 16:27	ferg	Assigned To	=> ferg
07-12-17 16:27	ferg	Status	new => closed
07-12-17 16:27	ferg	Resolution	open => no change required

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