205557 - If-Modified-Since not sent when requesting a page that provide a Last-Modified header

Status: RESOLVED EXPIRED

(Core :: Networking: HTTP, defect)

Description

[Loïc d'Anterroches]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.4b) Gecko/20030512
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.4b) Gecko/20030512

This may be related to bug 181477 or bug 156865 but I think not, that is why I
open a new bug.

Reproducible: Always

Steps to Reproduce:
1. Open the Live HTTP headers extension to monitor 
2. Open http://www.mozilla.org/index.html
3. Hit the reload button


Actual Results:  
4. Look... no If-Modified-Since header sent, even the css files are reloaded!  

Expected Results:  
To have the If-Modified-Since header sent in the request

Comment 1

[Loïc d'Anterroches]

Attachment: The Live HTTP header log when doing steps 1 to 3 with mozilla.org

Comment 2

[Bart van Bragt]

Cannot confirm with build 2003052309

http://www.mozilla.org/index.html

GET /index.html HTTP/1.1
Host: www.mozilla.org
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.4b) Gecko/20030523
Accept:
text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,video/x-mng,image/png,image/jpeg,image/gif;q=0.2,*/*;q=0.1
Accept-Language: en,en-us;q=0.5
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive: 300
Connection: keep-alive
If-Modified-Since: Sat, 24 May 2003 08:14:57 GMT

HTTP/1.x 304 Use local copy
Server: Netscape-Enterprise/3.6


I do experience some weird problems with Mozilla not sending 'if-modified-since'
but this doesn't seem to be related to mozilla.org.

Comment 3

[Luke Reeves]

I have the exact same problem - I thought at first it was the server I'm
developing causing the issue, but Mozilla 1.3.1 under Debian has this issue. 
IMS requests are never made, and what's more it looks as if there is nothing
being cached by Mozilla at all.  I'm going to wipe out my profile and try again.

Comment 4

[Bart van Bragt]

One thing to watch out for is the 'Vary:' header.. It seems like Mozilla is not
sending IMS headers when a Vary header was present on the request that sent the
'Last-Modified'. IMO that's a bug?

Guess I should file a new bug for that because mozilla.org (which this bug is
about) doesn't sent Vary headers.

Comment 5

[Luke Reeves]

Sounds like a new bug; the test case I was using has no Vary header present.

Comment 6

[Clint Priest]

This still seems to be an issue, is anyone working on this?

I've confirmed that this is still the case with FireFox 1.0

Comment 7

[Vadim L Burmakin]

Conformed, but fifty-fifty:
Then loading document first time, firefox sends if-mofified-since, but if i'll
try to load opened page second time (by hit Go button) firefox completly reload
page from server without if-modified-since header. Why? Opera & IE doesn't do that. 

Comment 8

[Gervase Markham [:gerv]]

This is an automated message, with ID "auto-resolve01".

This bug has had no comments for a long time. Statistically, we have found that
bug reports that have not been confirmed by a second user after three months are
highly unlikely to be the source of a fix to the code.

While your input is very important to us, our resources are limited and so we
are asking for your help in focussing our efforts. If you can still reproduce
this problem in the latest version of the product (see below for how to obtain a
copy) or, for feature requests, if it's not present in the latest version and
you still believe we should implement it, please visit the URL of this bug
(given at the top of this mail) and add a comment to that effect, giving more
reproduction information if you have it.

If it is not a problem any longer, you need take no action. If this bug is not
changed in any way in the next two weeks, it will be automatically resolved.
Thank you for your help in this matter.

The latest beta releases can be obtained from:
Firefox:     http://www.mozilla.org/projects/firefox/
Thunderbird: http://www.mozilla.org/products/thunderbird/releases/1.5beta1.html
Seamonkey:   http://www.mozilla.org/projects/seamonkey/

Comment 9

[Gervase Markham [:gerv]]

This bug has been automatically resolved after a period of inactivity (see above
comment). If anyone thinks this is incorrect, they should feel free to reopen it.

Comment 10

[Harikrishnadhas.K]

The problem is still there,

I'm setting last modified header, after the when refreshing the page the request is not sent with if-modified-since header.

The request is not even sent. The page is taken from the cache.

Response Headers:

Server	Apache-Coyote/1.1
Cache-Control	public
Expires	Mon, 15 Feb 2010 09:21:29 GMT
Etag	W/"9173-1265957641000"
Last-Modified	Fri, 12 Feb 2010 06:54:01 GMT
Content-Encoding	gzip
Vary	Accept-Encoding
Content-Type	text/javascript
Content-Length	2803
Date	Fri, 12 Feb 2010 06:57:29 GMT


Request Headers:

Host	192.168.1.101:8443
User-Agent	Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2) Gecko/20100115 Firefox/3.6
Accept	*/*
Accept-Language	en-us,en;q=0.5
Accept-Encoding	gzip,deflate
Accept-Charset	ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive	115
Connection	keep-alive
Referer	https://192.168.1.101:8443/nm/Login.rm?lng=eng
Cookie	JSESSIONID=42E22FD20A2FED0E16BC2F347D3AEEEF; nm=KUMAR