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Java Forum / General / August 2007ServletResponse headers
Hi, Is it possible that a SerlvetResponse will be flushed if large enough data is set for the header section in the response? or perhaps there is a guarantee this will not happen? > Is it possible that a SerlvetResponse will be flushed if large enough > data is set for the header section in the response? or perhaps there > is a guarantee this will not happen? Yes. No. Check the two methods: flushBuffer isCommited Arne On Aug 7, 5:04 pm, Arne Vajh?j <a...@vajhoej.dk> wrote: > Yes. No. > [quoted text clipped - 3 lines] > > Arne It appears that the buffer is for the response body, not the header section, although I'm really not sure. It still wasn't clear to me from the docs. Suppose the response body is completely empty and someone starts adding a large number of headers using "setHeader". Let's assume that it is flushed, now what happens if "addHeader" is called on something already committed? dave wrote : >> Yes. No. >> [quoted text clipped - 12 lines] > it is flushed, now what happens if "addHeader" is called on something > already committed? I believe that addHeader simply places the information into a HashMap. The JavaDoc for setHeader states: "Sets a response header with the given name and value. If the header had already been set, the new value overwrites the previous one. The containsHeader method can be used to test for the presence of a header before setting its value." When the resonse is ready to be sent back, then the headers are sent, and marked as committed. This allows you to set other response values (mime type, cookies, etc) "out of order", as they will not be sent until the page is ready to be sent. Note that this is only speculation...  SignatureWojtek :-) >> Yes. No. >> [quoted text clipped - 12 lines] > it is flushed, now what happens if "addHeader" is called on something > already committed? flushBuffer docs say: #A call to this method automatically commits the response, meaning the #status code and headers will be written. I would expect a setHeader call to fail after that. Arne Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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