How get the base URL via context path in JSF

Question

I have this structure   WebContent     resources         components             top xhtml      company         about us xhtml      index xhtml   top xhtml is a component  that is used in index xthml and about us xhtml too   top xhtml   lt ul gt       lt li gt  lt a href  index xhtml  gt Home lt  a gt  lt  li gt       lt li gt  lt a href  company about us xhtml  gt About us lt  a gt  lt  li gt           lt  ul gt    So my problem is  when the current page is index xhtml the component generates URLs correctly  but when the current page is about us xhtml  it generates wrong URLs  I cannot use relative path because it s going to generate the wrong URL too  I think it is because the component is based on the current path of the   xhtml page   The only solution I could found out is    lt ul gt       lt li gt  lt a href    pageContext request contextPath  webname index xhtml  gt Home lt  a gt  lt  li gt       lt li gt  lt a href    pageContext request contextPath  webname about us xhtml  gt About us lt  a gt  lt  li gt           lt  ul gt    But I think is not  elegant  at all  Any ideas

User · Answer

JSTL 1 2 variation leveraged from BalusC answer  lt c set var  quot baseURL quot  value  quot   pageContext request requestURL substring 0  pageContext request requestURL length   - pageContext request requestURI length      pageContext request contextPath   quot    gt    lt head gt     lt base href  quot   baseURL  quot    gt

User · Answer

URLs are not resolved based on the file structure in the server side  URLs are resolved based on the real public web addresses of the resources in question  It s namely the webbrowser who has got to invoke them  not the webserver   There are several ways to soften the pain   JSF EL offers a shorthand to   pageContext request  in flavor of   request     lt li gt  lt a href    request contextPath  index xhtml  gt Home lt  a gt  lt  li gt   lt li gt  lt a href    request contextPath  about us xhtml  gt About us lt  a gt  lt  li gt    You can if necessary use  lt c set gt  tag to make it yet shorter  Put it somewhere in the master template  it ll be available to all pages    lt c set var  root  value    request contextPath      gt       lt li gt  lt a href    root index xhtml  gt Home lt  a gt  lt  li gt   lt li gt  lt a href    root about us xhtml  gt About us lt  a gt  lt  li gt    JSF 2 x offers the  lt h link gt  which can take a view ID relative to the context root in outcome and it will append the context path and FacesServlet mapping automatically    lt li gt  lt h link value  Home  outcome  index    gt  lt  li gt   lt li gt  lt h link value  About us  outcome  about us    gt  lt  li gt    HTML offers the  lt base gt  tag which makes all relative URLs in the document relative to this base  You could make use of it  Put it in the  lt h head gt     lt base href    request requestURL substring 0  request requestURL length   - request requestURI length      request contextPath      gt       lt li gt  lt a href  index xhtml  gt Home lt  a gt  lt  li gt   lt li gt  lt a href  about us xhtml  gt About us lt  a gt  lt  li gt     note  this requires EL 2 2  otherwise you d better use JSTL fn substring    see also this answer   This should end up in the generated HTML something like as   lt base href  http   example com webname     gt    Note that the  lt base gt  tag has a caveat  it makes all jump anchors in the page like  lt a href   top  gt  relative to it as well  See also Is it recommended to use the  lt base gt  html tag  In JSF you could solve it like  lt a href    request requestURI  top  gt top lt  a gt  or  lt h link value  top  fragment  top    gt

[jsf] How get the base URL via context path in JSF?

The answer is

JSTL 1.2 variation leveraged from BalusC answer

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