199073 - If only the Content-Type of a file changes, the cached headers are not updated.

Status: VERIFIED DUPLICATE of bug 198072

(Core :: Networking: Cache, defect)

Description

[Russell O'Connor]

User-Agent:       Mozilla/5.0 (OS/2; U; Warp 4.5; en-US; rv:1.3) Gecko/20030313
Build Identifier: Mozilla/5.0 (OS/2; U; Warp 4.5; en-US; rv:1.3) Gecko/20030313

If the Content-Type of a URI is could change without changing the file itself. 
In which case the Last-Modified etc., headers remain the same, and only
Content-Type changes.  If Mozilla has a local copy of the file, it seems to use
it; however it fails to updated it's local information about the Content-Type.

For instance a text/html file could be changed to a text/plain file without
changing the file itself (or text/plain changed to text/html).  In this case
Mozilla should rerender the local files as text/plain, but instead continues to
render it as text/html (or it should render the file as text/html, but instead
continues to render it as text/plain).

Reproducible: Always

Steps to Reproduce:
1.Create some HTML resource at some URI like http://www.example.com/foo

2.Serve that file as text/plain.  With Apache you could add

<Files foo>
ForceType text/plain
</Files>

to a .htaccess file.

3.View the URI in Mozilla.  It correctly appears as a plain text file.  You can
see the HTML tags, etc.

4.Now serve the file as text/html.  In Apache use ForceType text/html as above.

5.Reload the URI.

Actual Results:  
The file is still rendered as text.  You can see the HTML tags, etc.

Expected Results:  
The file should have rendered as an HTML file since it is now served as text/html.

To workaround: change the last modified date on the server, or flush the memory
and disk cache on Mozilla.

Comment 1

[gordon]

This looks like a dup of bug 198072.

*** This bug has been marked as a duplicate of 198072 ***

Comment 2

[benc]

Web admin should check their server logs before filing cache bugs.

Please look at the information in the other bug to see what is going on. If you
have a different problem, reopen, and provide some web log data.