Hi, I am modifying the Tomcat 4.0.4 to make it a proxy cache server.
I am extending the container's (StandardHost) invoke(Request, Response) function to be able to forward a request if there is no cache for it. I use the apache commons-httpclient to implement the forwarding semantics. While I implement the transfering of data from httpclient method object to the Response object, I noticed some strange behavior regarding the Response object. What I did is first get a HttpServletResponse object reference from the Response object hresp, then I will call a loop of resp.setHeader(....) , then I do OutputStream os = resp.getOutputStream(); os.write(response_body_text_as_byte_array) When the origin server is another Tomcat server, it does not work, however if I comment out resp.setHeader(...), it is working (I mean the result shown in the browser) I do the forwarding inside a servlet, even with rest.setHeader(...), it still works. I wonder why is that? BTW, I am using IE 6 as browser. I feel I should do the setting of headers, they may contain cookies and other info. When I try against www.microsoft.com (url in the request), with header setting, it works, without header setting, it does not. Quite the opposite of Tomcat. When I try against www.yahoo.com, i find the same behavior as Tomcat. I wonder how it is related to the origin server, the format of their response or version? Thanks! --Zhenxin Wang DoCoMo Labs USA
