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http://issues.apache.org/bugzilla/show_bug.cgi?id=42497 Summary: 304 response should consistently include ETag header Product: Tomcat 5 Version: 5.5.23 Platform: PC OS/Version: Windows XP Status: NEW Severity: normal Priority: P2 Component: Unknown AssignedTo: [EMAIL PROTECTED] ReportedBy: [EMAIL PROTECTED] According to the HTTP spec, if a server includes an ETag header when it sends a file, it must also include the ETag when it sends a 304 (not-modified) response for that file. Tomcat does not do this for static files - if you request a static file and get a 200 response, the response has an ETag header; but if you get a 304 resopnse, the ETag is omitted. To reproduce: - In a browser, request a static file from Tomcat (e.g. http://localhost/tomcat.gif) - Make sure you get a 200 response (force reload or clear browser cache) - Examine the response headers (using a browser plugin or whatever) - note that there is an ETag header - Request the same file again, getting a 304 (not-modified) response from Tomcat - Examine the response headers - note there is no ETag The 304 response should include an ETag header, because the 200 response had one. Spec reference: RFC 2616 section 10.3.5 says: "304 Not Modified [...] The response MUST include the following header fields: [...] - ETag and/or Content-Location, if the header would have been sent in a 200 response to the same request" -- Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]