How to detect/avoid resubmission of HTML forms?
Hi, Is there any way to detect/avoid resubmission of HTML forms?
Thanks
Wasiq Hasan
Alex Worden <[email protected]> wrote:
> Yes, this is about right for checking resubmission of forms - in essence,
> you just need to remember that a form has been submitted by storing
> something in the user's session. If you are not using sessions, you have to
> use the technique I mentioned in my above post.
> A couple of notes though
> - it's a bad idea to store non-serializable datatypes in a session
Sure, but that's only an example. As far as replication goes between primary
and secondary, since this object represents a running process, some mechanism
should be provided to detect the situation when primary failed and this object
is accessed on the secondary - storing server ip in the constructor and comparing
it to the current - if they do not match the process needs to be restarted or
some other action taken.
> - it's a bad idea to spawn threads from a servlet - or in fact anywhere in
> your own code from within WebLogic. The threading code is unstable in most
> JDK releases in my experience and unsuitable for long-running critical apps.
> That's why WebLogic reuses a pool of threads instead of spawning new ones
> for each task. It is better to use a WebLogic API to spin off processes in
> new threads so they use a thread from the pool. Off the top of my head I
> forget how to do this - but I'll look into it and post a follow up.
This thing does not spawn any new threads - it uses weblogic execute ones.
If there is a public api which does the same (not JMS) please do follow up -
it will be very useful.
> Alex
> "Dimitri Rakitine" <[email protected]> wrote in message
> news:[email protected]...
>> Here is an example: http://dima.dhs.org/misc/LongRunningTask.html
>>
>> wasiq <[email protected]> wrote:
>> > Hi, Is there any way to detect/avoid resubmission of HTML forms?
>>
>> > Thanks
>> > Wasiq Hasan
>>
>> Dimitri
Thanks,
Dimitri
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<br><br>
<br><br>
but I want to write the form in a page , and then show it on another page , how to write it ?
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<br><br><br><br>
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this is a program to test the passing value
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p w :<input type="text" size="3" name="<%= fAge %>" value="">
<INPUT TYPE=submit name="<%= fSubmit %>" Value="Submit">
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<br><br>
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import="oracle.portal.provider.v2.http.HttpCommonConstants"
%>
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<meta http-equiv="Content-Type" content="text/html; charset=Big5">
<title>untitled</title>
</head>
<body>
Name:<%=fName%>
Age :<%=fAge%>
</body>
</html>
<br>then I deployed them on the portal , run it , the result is :after I submit it , the browser give me : http 404 page not found!
[b]here is the provider.xml<br>[b[i]]<?xml version = '1.0' encoding = 'UTF-8'?>
<?providerDefinition version="3.1"?>
<provider class="oracle.portal.provider.v2.DefaultProviderDefinition">
<session>true</session>
<passAllUrlParams>true</passAllUrlParams>
<portlet class="oracle.portal.provider.v2.DefaultPortletDefinition">
<id>1</id>
<name>PassingValues4</name>
<title>PassingValues4</title>
<description>PassingValues4</description>
<timeout>60</timeout>
<showEditToPublic>false</showEditToPublic>
<hasAbout>false</hasAbout>
<showEdit>false</showEdit>
<hasHelp>false</hasHelp>
<showEditDefault>false</showEditDefault>
<showDetails>false</showDetails>
<renderer class="oracle.portal.provider.v2.render.RenderManager">
<renderContainer>true</renderContainer>
<renderCustomize>true</renderCustomize>
<autoRedirect>true</autoRedirect>
<contentType>text/html</contentType>
<showPage>/htdocs/passingvalues4/PassingValues4InputPage.jsp</showPage>
<showPage>/htdocs/passingvalues4/getValues.jsp</showPage>
</renderer>
</portlet>
</provider>
<br><br><br>
<br><br>
would you kind enough to help me ? thanks!!!
Message was edited by:
moonsoftHi Moonsoft,
I have already answered this query in the other post at Re: how to link more than one links in portlet?(jsp develop)
<form name = "showPageForm" method = "POST" action = "<%= UrlUtils.htmlFormActionLink(pReq,UrlUtils.PAGE_LINK) %>">
<%= UrlUtils.htmlFormHiddenFields(pReq,UrlUtils.PAGE_LINK, "showPageForm") %>
<input type="text" name="param1">
<input type="text" name="param2">
<input type="hidden" name="myPPN" value="/htdocs/page2.jsp">
</form>then in your jsp code on page2.jsp, you will extract the parameters by specifying
<%
String p1 = request.getParameter("param1");
String p2 = request.getParameter("param2");
%>
>>this is easy common jsp or asp development, but in oracle is too diffcult!!!!
:-) .. there is a difference between web-applications and portlets, you just need to get used to it once. I hope this does clarify your doubts.
thanks,
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Unable to detect any parameter in html (webresource) when value is passed from onload method of form
Unable to detect any parameter in html (webresource) when value is passed from onload method of form
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var querystringparts = querystring.split('&');
for(var i=0; i<querystringparts.length;i++)
var split = querystringparts[i].split('=');
params.push({
name: split[0],
value: split[1]
</script>
</head>
<body>
</body>
</html>
Hope it helps now. Kind Regards -
How can an applet retrieve the values of a HTML form shown in a JEditorPane
Hi,
I'm doing an applet that contains a JTree and a JEditorPane
among other components. Each node of the JTree represents some
information that is stored in a database, and whenever a JTree
node is selected, this information is recovered and shown in
the JEditorPane with a html form. To make the html form,
the applet calls a servlet, which retrieves the information of
the node selected from the database. This information is stored
like a XML string, and using XSLT, the servlet sends the html
form to the applet, which shows it in the JEditorPane.
My problem is that I don't know how I can recover new values
that a user of the application can introduce in the input fields
of the html form. I need to recover this new values and send them
to another servlet which store the information in the database.
If someone could help me I'd be very pleased.
EduardoAt least I found a fantastic example. Here it is:
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.net.*;
import javax.swing.*;
import javax.swing.text.*;
import javax.swing.text.html.*;
public class FormSubmission extends JApplet {
private final static String FORM_TEXT = "<html><head></head><body><h1>Formulario</h1>"
+ "<form action=\"\" method=\"get\"><table><tr><td>Nombre:</td>"
+ "<td><input name=\"Nombre\" type=\"text\" value=\"James T.\"></td>"
+ "</tr><tr><td>Apellido:</td>"
+ "<td><input name=\"Apellido\" type=\"text\" value=\"Kirk\"></td>"
+ "</tr><tr><td>Cargo:</td>"
+ "<td><select name=\"Cargo\"><option>Captain<option>Comandante<option>General</select></td>"
+ "</tr><td colspan=\"2\" align=\"center\"><input type=\"submit\" value=\"Enviar\"></td>"
+ "</tr></table></form></body></html>";
protected HashMap radioGroups = new HashMap();
private Vector v = new Vector();
public FormSubmission() {
getContentPane().setLayout(new BorderLayout());
JEditorPane editorPane = new JEditorPane();
editorPane.setEditable(false);
editorPane.setEditorKit(new HTMLEditorKit()
public ViewFactory getViewFactory() {
return new HTMLEditorKit.HTMLFactory() {
public View create(Element elem) {
Object o = elem.getAttributes().getAttribute(javax.swing.text.StyleConstants.NameAttribute);
if (o instanceof HTML.Tag)
HTML.Tag kind = (HTML.Tag) o;
if (kind == HTML.Tag.INPUT || kind == HTML.Tag.SELECT || kind == HTML.Tag.TEXTAREA)
return new FormView(elem)
protected void submitData(String data)
showData(data);
protected void imageSubmit(String data)
showData(data);
// Workaround f�r Bug #4529702
protected Component createComponent()
if (getElement().getName().equals("input") &&
getElement().getAttributes().getAttribute(HTML.Attribute.TYPE).equals("radio"))
String name = (String) getElement().getAttributes().getAttribute(HTML.Attribute.NAME);
if (radioGroups.get(name) == null)
radioGroups.put(name, new ButtonGroup());
((JToggleButton.ToggleButtonModel) getElement().getAttributes().getAttribute(StyleConstants.ModelAttribute)).setGroup((ButtonGroup) radioGroups.get(name));
JComponent comp = (JComponent) super.createComponent();
// Peque�a mejora visual
comp.setOpaque(false);
return comp;
return super.create(elem);
//editorPane.setText(FORM_TEXT);
editorPane.setText(texto);
getContentPane().add(new JScrollPane(editorPane), BorderLayout.CENTER);
private void showData(String data) {
// ergebnis significa resultado
StringBuffer ergebnis = new StringBuffer("");
StringTokenizer st = new StringTokenizer(data, "&");
while (st.hasMoreTokens()) {
String token = st.nextToken();
String key = URLDecoder.decode(token.substring(0, token.indexOf("=")));
String value = URLDecoder.decode(token.substring(token.indexOf("=")+1,token.length()));
v.add(value);
ergebnis.append(" "); ergebnis.append(key); ergebnis.append(": "); ergebnis.append(value); ergebnis.append(" ");
ergebnis.append(" ");
JOptionPane.showMessageDialog(this, ergebnis.toString());
public static void main(String[] args) throws Exception {
JFrame frame = new JFrame ();
FormSubmission editor = new FormSubmission ();
frame.getContentPane().add(editor);
frame.pack();
frame.show();
} -
How can i get the value from a HTML Form
hi,
I am using HTML form (logfrm). there are userId field,password field, submit button,reset button, and a link.
when i click on the link, it should fetch the value of userid.
How it is possible?
AEuse jsp:
which lets you embed java statments in your html -so you when you click on the link you can use request.getParameter("userID") to get the userid.
Ideally with html forms use a combination of jsp and java beans, where the fields in the form are also fields in your java bean, which you can access through setters and getters.
google for some jsp tutorials. -
How can I change the order of html form data submitted to me via email?
I am having customers contact me via an html form posted on my website using the "sendtoemail" command. When I receive the data in an e-mail it is not presented in the order it appears on the web page and I can't seem to find out what dictates the order the data is presented in or how I can change it.
Anyone have any ideas on how I can make HTML form data elements appear in the order I want?
Thanks,
AndyOr find a commercial form-to-email script that is compatible with your server's configuration (PHP, ASP, Perl...) and customize it to your needs.
Formm@ailer PHP from DB Masters
http://dbmasters.net/index.php?id=4
FormToEmail.com (free & pro versions available)
http://formtoemail.com/formtoemail_pro_version.php
Tectite
http://www.tectite.com/formmailpage.php
Forms to Go from Bebosoft (script generating software)
http://www.bebosoft.com/products/formstogo/overview/
Nancy O.
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