RE: caching static objects
We are running Tomcat-standalone and are having some caching issues. It appears to be a browser issue, but there's got to be some workaround. We've got the headers set to pragma nocache, but it continues to cache objects, such as charts that are created dynamically. I suppose this wouldn't be an issue if the code worked with Apache. Also, creating unique identifiers for each object has been shot down. Does anyone know of a way to get server.xml to set each object not to cache? Thanks. The 'Pragma' header you use is from HTTP/1.0. Most caches, including browser cache, by now use HTTP/1.1, where cache control is achieved differently. You should use 'Cache-Control' headers (although it never hurts to also use 'Pragma' headers, in case you encounter an older HTTP/1.0 cache). For more information you can look at the HTTP/1.1 RFC at: ftp://ftp.isi.edu/in-notes/rfc2616.txt and search for the text 'Cache-Control'. Regards, Ronald. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: How can I get a method to be called every 60 seconds in Tomca t?
I want to get a method to automatically get called every 60 seconds in Tomcat. The method reset() will reset monitoring information. How can I do this? java.util.Timer and java.util.TimerTask Regards, Ronald. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Filters and load-on-startup
Hi, Do filters get loaded before servlets regardless of load-on-startup value? I don't think so: as filters can be mapped to servlet-name, servlets must be loaded first. (Although I suppose you could read web.xml, so you have the servlet info, then instantiance filters, then instantiate servlets, but tomcat doesn't do this). I wouldn't rely on this order unless you had to, however, as it's not mandated either way by the Servlet Specification. Actually, it is. SRV9.12 mandates the following load order: listeners, filters, servlets (Servlet Specification 2.4). So any filters should be loaded before any servlets, regardless of load-on-startup value. Regards, Ronald. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Passing init params to a listener?
G'day, I assume from this that init parameters can only be accessed by a listener if they have been declared globally within the applications context and not from within the scope of the listener itself? Hm You can not specify initialization parameters for individual listeners. The syntax you use is even illegal. I do not really see why this should not be possible, since all other web components (servlets, filters) can be parameterized, but that may be something for a future specification. Regards, Ronald. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: redirect and request´s attributes doubts
Hello dudes, i´m trying to set some attributes to a request in my servlet, that´s pretty easy as you know, but after i must use redirect to a JSP page and when i try to recall those attributes created before they doesn´t appear in JSP´s request object. Even thought i set a request´s attribute and use redirect i cannot get it again, can i? The attributes you add to the request are added on the server. There is a request object on the server that you add attributes to. If you use sendRedirect, the client (browser) receives a redirect response from the server (status code 3xx), with the location to redirect to. The client then creates a _new_ request for the new url and sends it to the server. The server creates a new HttpServletRequest object for you that has nothing to do with the old object. Regards, Ronald. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Dump HTTP Request and Response Headers
Dear folks, How could i dump HTTP Response and Request headers. Im using Apache 1.3 and Tomcat 4.0 MOD_JK. For Mozilla you have a tool called Live HTTP Headers (http://livehttpheaders.mozdev.org/) that does exactly what you want. You install it into Mozilla and it shows you the headers that are sent and received by the browser. Undoubtedly for IE there exist similar tools. Regards, Ronald. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Setting page content Type
I have been experiementing with jsp:directive.page contentType=... / @ page contentType=... / but none of them seem to be able to take a variable value for contentType, These constructs will indeed not work (and they never will work in future versions either). The constructs you use are directives (the first one in XML syntax, the second in JSP syntax). Directives are interpreted at page translation time. The tags you attempt to use are not executed at page translation time but at page execution time (when a request is received for the page). Directives can not have variables as attributes, since the value of these variables can never be known at the time the page is translated to a servlet. Regards, Ronald. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: release method in taglib
I have created several custom tag libs, I notice there is a release() method in the TagSupport class. Will the release() method be automically called the tag lib is finished? If not, where should I call it? Thanks! It will be called by the JSP page implementation object automatically, so you don't have to call this yourself. Multiple invocations on doStartTag and doEndTag may have occurred before this method is called (for example when multiple tags of the same type occur on a page). Regards, Ronald. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: HttpServletResponse.sendRedirect() closes the stream
-Oorspronkelijk bericht- Van: suviswan [mailto:[EMAIL PROTECTED] Verzonden: woensdag 10 maart 2004 10:20 Aan: Tomcat Users List Onderwerp: HttpServletResponse.sendRedirect() closes the stream Hi I am using Tomcat 4.1.29. When i do HttpServletResponse.sendRedirect() inside my servlet doGet(), it automatically closes the stream So when i call the real close() function it throws IOException java.io.IOException: The stream has been closed at org.apache.catalina.connector.ResponseStream.close(ResponseStr eam.java:219) Please let me know how to solve on this. The easiest way would be not to call close() on the response's output stream. Is there a reason you need to call close()? The servlet spec says that sendRedirect has the side effect of committing the response and terminating it. If the response is terminated, its related OutputStream is closed, so it can not be closed again. Thanks Surendra Regards, Ronald. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Tomcat 4.1 hangs on File Reading
snip
public static LoginLog[] readLog()throws FileNotFoundException
{
Vector log = new Vector();
try {
FileReader inFile = new FileReader( /var/log/GFWlogin.log );
BufferedReader bfFile = new BufferedReader( inFile );
while ( bfFile.ready() ) {
LoginLog logentry = getLogentry( bfFile );
log.add( logentry );
}
bfFile.close();
} catch ( IOException e ) {} ;
return (LoginLog[])log.toArray( new LoginLog[log.size()] );
}
Why not simply use:
String line = null;
while ((line = bfFile.readLine()) != null) {
LoginLog logEntry = getLogEntry(line); // Create log entry from the
line just read.
log.add(logEntry);
}
There is no need to use 'bfFile.ready()'. This method only checks
whether the call to a read method may block, which is not a problem
at all.
Regards,
Ronald.
-
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RE: Tomcat Realm Authentication + Storing Objects In The Session
My biggest unknown right now is, because the server handles the creation of the session, what would it take to make the server grab a user object from the database and store it in the session after the user logs in? Can't you use an HttpSessionListener for this? It is called right after a session is created (and when it's destroyed again). I'm not sure though whether there's enough information in the HttpSession object for you to be able to grab something from the database at the time HttpSessionListener.sessionCreated() is called. Regards, Ronald. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Asynchronous messages from servlets
Hi, I have the following problem. A simple form submits data to a servlet. The servlet sends a message via JMS to another application (in another JVM). Once the message has been sent, the 'service' method of the servlet ends. After a while, say five seconds, the other application would like to send back a response. How do I show this response to the user? Since the 'service' method has finished after sending the message, I have lost control over the output from the other application. What I need is a way to push the response to the browser. I would like the server to take the initiative in updating the browser window, not the user. Is this possible in any way? Thanks in advance, Ronald Wildenberg -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED]
