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Clear user browser cache via code
Hi ,
I need to programmatically clear the user browser cache/cookie/temp files through the Java/J2EE code initially when the user hit the site for any transactions. So that there wont be any cache issue for the user to perform various transactions. Please let me know what is the best approach to do so?
Thanks.
Answers
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I have not found a "good way" to do this, but requesting the browser to do it, is the best I've ever come up with. The browser knows where it is supporting it's cache.
-
The recommended method is
<span class="tag" style="font-style: inherit; font-weight: inherit; font-family: inherit; color: #7d2727;"><meta</span><span class="pln" style="font-style: inherit; font-weight: inherit; font-family: inherit; color: #303336;"> </span><span class="atn" style="font-style: inherit; font-weight: inherit; font-family: inherit; color: #e64320;">http-equiv</span><span class="pun" style="font-style: inherit; font-weight: inherit; font-family: inherit; color: #303336;">=</span><span class="atv" style="font-style: inherit; font-weight: inherit; font-family: inherit; color: #0f74bd;">'cache-control'</span><span class="pln" style="font-style: inherit; font-weight: inherit; font-family: inherit; color: #303336;"> </span><span class="atn" style="font-style: inherit; font-weight: inherit; font-family: inherit; color: #e64320;">content</span><span class="pun" style="font-style: inherit; font-weight: inherit; font-family: inherit; color: #303336;">=</span><span class="atv" style="font-style: inherit; font-weight: inherit; font-family: inherit; color: #0f74bd;">'no-cache'</span><span class="tag" style="font-style: inherit; font-weight: inherit; font-family: inherit; color: #7d2727;">></span><span class="pln" style="font-style: inherit; font-weight: inherit; font-family: inherit; color: #303336;"><br/></span><span class="tag" style="font-style: inherit; font-weight: inherit; font-family: inherit; color: #7d2727;"><meta</span><span class="pln" style="font-style: inherit; font-weight: inherit; font-family: inherit; color: #303336;"> </span><span class="atn" style="font-style: inherit; font-weight: inherit; font-family: inherit; color: #e64320;">http-equiv</span><span class="pun" style="font-style: inherit; font-weight: inherit; font-family: inherit; color: #303336;">=</span><span class="atv" style="font-style: inherit; font-weight: inherit; font-family: inherit; color: #0f74bd;">'expires'</span><span class="pln" style="font-style: inherit; font-weight: inherit; font-family: inherit; color: #303336;"> </span><span class="atn" style="font-style: inherit; font-weight: inherit; font-family: inherit; color: #e64320;">content</span><span class="pun" style="font-style: inherit; font-weight: inherit; font-family: inherit; color: #303336;">=</span><span class="atv" style="font-style: inherit; font-weight: inherit; font-family: inherit; color: #0f74bd;">'0'</span><span class="tag" style="font-style: inherit; font-weight: inherit; font-family: inherit; color: #7d2727;">></span><span class="pln" style="font-style: inherit; font-weight: inherit; font-family: inherit; color: #303336;"><br/></span><span class="tag" style="font-style: inherit; font-weight: inherit; font-family: inherit; color: #7d2727;"><meta</span><span class="pln" style="font-style: inherit; font-weight: inherit; font-family: inherit; color: #303336;"> </span><span class="atn" style="font-style: inherit; font-weight: inherit; font-family: inherit; color: #e64320;">http-equiv</span><span class="pun" style="font-style: inherit; font-weight: inherit; font-family: inherit; color: #303336;">=</span><span class="atv" style="font-style: inherit; font-weight: inherit; font-family: inherit; color: #0f74bd;">'pragma'</span><span class="pln" style="font-style: inherit; font-weight: inherit; font-family: inherit; color: #303336;"> </span><span class="atn" style="font-style: inherit; font-weight: inherit; font-family: inherit; color: #e64320;">content</span><span class="pun" style="font-style: inherit; font-weight: inherit; font-family: inherit; color: #303336;">=</span><span class="atv" style="font-style: inherit; font-weight: inherit; font-family: inherit; color: #0f74bd;">'no-cache'</span><span class="tag" style="font-style: inherit; font-weight: inherit; font-family: inherit; color: #7d2727;">></span> -
You won't be able to do that in Java.
You need to do it through enforcing things like no-cache http headers in the response and meta tags in the html and hope that the browser and any proxy servers in between you and the client honour those headers (of which there is no guarantee).