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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=15890 Invalid If-Modified-Since leads to empty response. Summary: Invalid If-Modified-Since leads to empty response. Product: Tomcat 4 Version: 4.1.17 Platform: All OS/Version: All Status: NEW Severity: Normal Priority: Other Component: Connector:Coyote HTTP/1.1 AssignedTo: [EMAIL PROTECTED] ReportedBy: [EMAIL PROTECTED] This was observed for static content, so the bug may be in org.apache.catalina.servlets.DefaultServlet rather than the connector itself. When a client provides an invalid If-Modified-Since header (eg Java 1.3 URLConnection class on a non-English locale does this; see Sun bug #4397096), the response is always empty, with a 200 response code. I'd expect an invalid If-Modified-Since header to be ignored and the response returned normally (in this case it should have been about 15k worth). Example below (Japanese character for Thurs replaced with [MOKU] since it gets corrupted otherwise). GET /altio/altioClient.js HTTP/1.1 Cookie: JSESSIONID=344928E8EB29CFC13A93D232FDDF0834 User-Agent: Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0; .NET CLR 1.0.3705) X-Altio-Proxy: 41710 Accept-Language: en-us,ja;q=0.5 Host: altiojr:8080 Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2 Connection: keep-alive If-Modified-Since: [MOKU], 01 1 1970 00:00:00 GMT HTTP/1.1 200 OK Content-Type: text/plain Content-Length: 0 Date: Wed, 08 Jan 2003 15:32:56 GMT Server: Apache Coyote/1.0 -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>