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Sistemi distribuiti: design Forum del Corso Messaggi del Thread
 
Sistemi distribuiti: design - Forum del Corso
Messaggi del Thread

Autore Messaggio
gianni.costanzi
Thread
  Post Postato: 23 gennaio 2005
   Titolo: Absolute URLs and application root
 

I want to ask you one thing about the use of absolute URLs in the JSP pages and in the servlets.. 
Suppose that I have a web application called "webapp" with an index.jsp page in its root.. When I want to forward from a servlet to that page I get a RequestDispatcher giving to it the string "/index.jsp".. Why, if I create a jsp page with a form and in the action field of the form I specify "/index.jsp" when I click on submit I am directed to "http://localhost:8080/index.jsp" (that does not exist) instead of being directed to "http://localhost:8080/webapp/index.jsp"? Is there any way to specify that with the initial "/" I mean the root of the application  and not the level in which all the web applications are placed? Why should the servlet and the form behave differently? Perhaps it's only a matter of specifying something in the web.xml..

Thank you!
afogarolli
  Post Postato: 24 gennaio 2005
   Titolo: Re: Absolute URLs and application root
 


If you use RequestDispatcher your example is ok because the url is always relative to the current web application.
If you put a reference to a jsp in the html form, the / character always reference to the tomcat root that's why the browser redirects your request to localhost:8080/index.jsp.
To make it works you can use an url relative to the html form  or a complete url ex. http:/localost:8080/webapp/index.jsp.
This is the way the browser manages the links.
Bye.
S_andrew
  Post Postato: 10 febbraio 2005
   Titolo: Re: Absolute URLs and application root
 

If you are putting some url's to resources into your jsp pages, I suggest you to insert <%= request.getContextPath() %> instead of the name of your web application. Because next time, when your change the application name it will be very difficult to modify all names.
gianni.costanzi
  Post Postato: 12 febbraio 2005
   Titolo: Re: Re: Absolute URLs and application root
 

S_andrew wrote:
If you are putting some url's to resources into your jsp pages, I suggest you to insert <%= request.getContextPath() %> instead of the name of your web application. Because next time, when your change the application name it will be very difficult to modify all names.


Thank you, I used <%= application.getServletContextName() %> because I thought it was not a good idea to put the application name inside the pages (for the reason that you already said)
 
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