Leo,
On 5/15/21 21:16, leo wrote:
Hi Folks
In a small scale personal project served by Tomcat I record things per
logged-in user. The user is available as an attribute to Tomcat’s
session objects. In the JSP pages I retrieve the session object *through
Java* like this
<%
HttpSession session = request.getSession();
...
user = (String)session.getAttribute("user");
...
%>
Then later on these pages *in the JavaScript* part I have:
<script type="text/javascript">
var user = "<%=user%>"
...
</script>
In the JavaScript part I then do something with the *JavaScript*
variable `user`.
I now would like to move away from JSP to normal HTML pages (stills
served by Tomcat with the session backend)
Question: Can I get the content of the session object in pure
JavaScript? Can I somehow configure Tomcat to put the session info in
some page headers or similar so that JavaScript can read it directly?
If you want to switch to javascript, you'll probably want to make an
XMLHttpRequest from your js code on the client to your Tomcat server.
Have the server's response be something in JSON. Feel free to pass the
whole session (which I wouldn't recommend) or just what you need.
Perhaps you could create an API call like /user/info which returns a
JSON object representing the user:
{
"username" : "leo",
"timezone" : "America/Chicago",
"first" : "Leo",
"last" : "Tomcat"
}
Short of dumping the whole session data into the HTML page (which is
ugly, wasteful, and potentially dangerous), the above is probably your
best bet.
-chris
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