How to check if requested URL is a servlet (in a filter)?
I have a filter that maps onto all requests:
@WebFilter({ "/*" })
I use this filter to do url mapping so that i can have vanity urls for my jsps and to handle 404s, however it also means i have to manually add the servlets to process the request chain normally:
String requri = ((HttpServletRequest) request).getRequestURI(); //get requested url
String page = "";
if(requri.equals("/contact/") || requri.equals("/contact"))
page = "contact.jsp";
else if(requri.equals("/about/") || requri.equals("/about"))
page = "about.jsp";
else if(requri.equals("/SomeServlet"))
chain.doFilter(request, response); //if requested url is a servlet, then carry on normally
//send requested url to servlet which will then forward user to the appropriate page
request.getRequestDispatcher("/GetPage?page="+page).forward(request, response);
return;
It all works great.
But is there a way to get a list of the url mappings for all the servlets? So that i don't have to manually list each url mapping for the servlets.. i.e:
else if(requri.equals("/SomeServlet") || requri.equals("/AnotherServlet") || requri.equals("/SomeOtherServlet"))
chain.doFilter(request, response); //if requested url is a servlet, then carry on normally
The ideal:
else if(isAServlet(requri))
chain.doFilter(request, response); //if requested url is a servlet, then carry on normally
java servlets java-ee
asked Nov 13 '18 at 17:39
Jonathan LaliberteJonathan Laliberte
1,6042824
add a comment |
I have a filter that maps onto all requests:
@WebFilter({ "/*" })
I use this filter to do url mapping so that i can have vanity urls for my jsps and to handle 404s, however it also means i have to manually add the servlets to process the request chain normally:
String requri = ((HttpServletRequest) request).getRequestURI(); //get requested url
String page = "";
if(requri.equals("/contact/") || requri.equals("/contact"))
page = "contact.jsp";
else if(requri.equals("/about/") || requri.equals("/about"))
page = "about.jsp";
else if(requri.equals("/SomeServlet"))
chain.doFilter(request, response); //if requested url is a servlet, then carry on normally
//send requested url to servlet which will then forward user to the appropriate page
request.getRequestDispatcher("/GetPage?page="+page).forward(request, response);
return;
It all works great.
But is there a way to get a list of the url mappings for all the servlets? So that i don't have to manually list each url mapping for the servlets.. i.e:
else if(requri.equals("/SomeServlet") || requri.equals("/AnotherServlet") || requri.equals("/SomeOtherServlet"))
chain.doFilter(request, response); //if requested url is a servlet, then carry on normally
The ideal:
else if(isAServlet(requri))
chain.doFilter(request, response); //if requested url is a servlet, then carry on normally
java servlets java-ee
asked Nov 13 '18 at 17:39
Jonathan LaliberteJonathan Laliberte
1,6042824
add a comment |
I have a filter that maps onto all requests:
@WebFilter({ "/*" })
I use this filter to do url mapping so that i can have vanity urls for my jsps and to handle 404s, however it also means i have to manually add the servlets to process the request chain normally:
String requri = ((HttpServletRequest) request).getRequestURI(); //get requested url
String page = "";
if(requri.equals("/contact/") || requri.equals("/contact"))
page = "contact.jsp";
else if(requri.equals("/about/") || requri.equals("/about"))
page = "about.jsp";
else if(requri.equals("/SomeServlet"))
chain.doFilter(request, response); //if requested url is a servlet, then carry on normally
//send requested url to servlet which will then forward user to the appropriate page
request.getRequestDispatcher("/GetPage?page="+page).forward(request, response);
return;
It all works great.
But is there a way to get a list of the url mappings for all the servlets? So that i don't have to manually list each url mapping for the servlets.. i.e:
else if(requri.equals("/SomeServlet") || requri.equals("/AnotherServlet") || requri.equals("/SomeOtherServlet"))
chain.doFilter(request, response); //if requested url is a servlet, then carry on normally
The ideal:
else if(isAServlet(requri))
chain.doFilter(request, response); //if requested url is a servlet, then carry on normally
java servlets java-ee
asked Nov 13 '18 at 17:39
Jonathan LaliberteJonathan Laliberte
1,6042824
I have a filter that maps onto all requests:
@WebFilter({ "/*" })
I use this filter to do url mapping so that i can have vanity urls for my jsps and to handle 404s, however it also means i have to manually add the servlets to process the request chain normally:
String requri = ((HttpServletRequest) request).getRequestURI(); //get requested url
String page = "";
if(requri.equals("/contact/") || requri.equals("/contact"))
page = "contact.jsp";
else if(requri.equals("/about/") || requri.equals("/about"))
page = "about.jsp";
else if(requri.equals("/SomeServlet"))
chain.doFilter(request, response); //if requested url is a servlet, then carry on normally
//send requested url to servlet which will then forward user to the appropriate page
request.getRequestDispatcher("/GetPage?page="+page).forward(request, response);
return;
It all works great.
But is there a way to get a list of the url mappings for all the servlets? So that i don't have to manually list each url mapping for the servlets.. i.e:
else if(requri.equals("/SomeServlet") || requri.equals("/AnotherServlet") || requri.equals("/SomeOtherServlet"))
chain.doFilter(request, response); //if requested url is a servlet, then carry on normally
The ideal:
else if(isAServlet(requri))
chain.doFilter(request, response); //if requested url is a servlet, then carry on normally
java servlets java-ee
java servlets java-ee
asked Nov 13 '18 at 17:39
Jonathan LaliberteJonathan Laliberte
1,6042824
asked Nov 13 '18 at 17:39
Jonathan LaliberteJonathan Laliberte
1,6042824
edited Nov 13 '18 at 17:55
Jonathan Laliberte
asked Nov 13 '18 at 17:39
Jonathan LaliberteJonathan Laliberte
1,6042824
asked Nov 13 '18 at 17:39
Jonathan LaliberteJonathan Laliberte
1,6042824
asked Nov 13 '18 at 17:39
Jonathan LaliberteJonathan Laliberte
1,6042824
1,6042824
add a comment |
add a comment |
1 Answer
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If you are in JEE >= JEE 7 there is ServletContext.getServletRegistrations(). It returns a map from servlet names to ServletRegistration objects. These have a getMappings() method that gets you the URL mappings for that servlet. You will probably have to process these a bit, e.g. apply the servlet URL mapping rules manually, to see which servlet, if any, would get called.
answered Nov 13 '18 at 21:27
Nikos ParaskevopoulosNikos Paraskevopoulos
33.9k96976
That's brilliant, just what was needed. Thanks!
– Jonathan Laliberte
Nov 14 '18 at 11:15
add a comment |
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1 Answer
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
If you are in JEE >= JEE 7 there is ServletContext.getServletRegistrations(). It returns a map from servlet names to ServletRegistration objects. These have a getMappings() method that gets you the URL mappings for that servlet. You will probably have to process these a bit, e.g. apply the servlet URL mapping rules manually, to see which servlet, if any, would get called.
answered Nov 13 '18 at 21:27
Nikos ParaskevopoulosNikos Paraskevopoulos
33.9k96976
That's brilliant, just what was needed. Thanks!
– Jonathan Laliberte
Nov 14 '18 at 11:15
add a comment |
If you are in JEE >= JEE 7 there is ServletContext.getServletRegistrations(). It returns a map from servlet names to ServletRegistration objects. These have a getMappings() method that gets you the URL mappings for that servlet. You will probably have to process these a bit, e.g. apply the servlet URL mapping rules manually, to see which servlet, if any, would get called.
answered Nov 13 '18 at 21:27
Nikos ParaskevopoulosNikos Paraskevopoulos
33.9k96976
That's brilliant, just what was needed. Thanks!
– Jonathan Laliberte
Nov 14 '18 at 11:15
add a comment |
If you are in JEE >= JEE 7 there is ServletContext.getServletRegistrations(). It returns a map from servlet names to ServletRegistration objects. These have a getMappings() method that gets you the URL mappings for that servlet. You will probably have to process these a bit, e.g. apply the servlet URL mapping rules manually, to see which servlet, if any, would get called.
answered Nov 13 '18 at 21:27
Nikos ParaskevopoulosNikos Paraskevopoulos
33.9k96976
If you are in JEE >= JEE 7 there is ServletContext.getServletRegistrations(). It returns a map from servlet names to ServletRegistration objects. These have a getMappings() method that gets you the URL mappings for that servlet. You will probably have to process these a bit, e.g. apply the servlet URL mapping rules manually, to see which servlet, if any, would get called.
answered Nov 13 '18 at 21:27
Nikos ParaskevopoulosNikos Paraskevopoulos
33.9k96976
answered Nov 13 '18 at 21:27
Nikos ParaskevopoulosNikos Paraskevopoulos
33.9k96976
answered Nov 13 '18 at 21:27
Nikos ParaskevopoulosNikos Paraskevopoulos
33.9k96976
answered Nov 13 '18 at 21:27
Nikos ParaskevopoulosNikos Paraskevopoulos
33.9k96976
33.9k96976
That's brilliant, just what was needed. Thanks!
– Jonathan Laliberte
Nov 14 '18 at 11:15
add a comment |
That's brilliant, just what was needed. Thanks!
– Jonathan Laliberte
Nov 14 '18 at 11:15
That's brilliant, just what was needed. Thanks!
– Jonathan Laliberte
Nov 14 '18 at 11:15
That's brilliant, just what was needed. Thanks!
– Jonathan Laliberte
Nov 14 '18 at 11:15
add a comment |
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