1. I use Tomcat with realm auhentication (based on cookies)
2. I use URLLoader to get some XML data with Struts Action handlers
it is usual to set headers to disable cache in the browser like this:
response.setHeader("Cache-Control","no-store"); // for HTTP1.1
response.setHeader("Pragma","no-cache"); // for HTTP 1.0
response.setDateHeader ("Expires", 0); // for proxy
3. I use FileReference to upload a file
Actual Results:
- when Tomcat set "Pragma: no-cache" on url used by URLLoader, FileReference won't work when I upload a file
- When I force to an empy string: "Pragma: ", FileRerence work !
note: I created a J2EE filter to set the header like this:
response.setHeader("Cache-Control","no-store"); // I must use this to prevent response caching in HTTP 1.1
response.setDateHeader ("Expires", 0); // for proxy
response.setHeader("Pragma","");
Expected Results:
FileReference should work even "Pragma: no-cache" is set on the server.
Workaround (if any):
- force "Pragma:" to an empty string, use only HTTP1.1 headers
- add the session in the url of FileReference like this: "/MyAction.do;jsessionid=F401B8249286E3BD7E8C7C0376B474D5"
Note:
When FileReference fail on "error #2038", the Server is never reach by the Flash player.