Re: Accessing images through FrontController Servlet
You are right that a call for an image, or css for that matter, is another call to the server. And, this call is really not anything special, except that it returns a stream. If you want to get a response from a URL, then you have to follow the rules in doing this. If you instead want to get a response from a protocol, like using a servlet, then you have different rules. There is nothing really magical going on. Why are you using this init business? On 5/21/05, William BC Crandall [EMAIL PROTECTED] wrote: Thanks Robert, Hard-coding the images works fine, but I'm leery of this, as they will of course all need to be changed when the app goes up on a public server; changes could be localized, but... Is there really no way to declare img calls in the web-app that would allow images to use relative path names? The init-param 'imgURL' sounds like it should allow this, but I'm not familiar with it. Thanks for your suggestion, which gets things moving again. Thanks too for the pointer to Ethereal; looks like a useful tool. Best, -BC William BC Crandall bc.crandall [around] earthlink.net - Original Message - From: Robert r. Sanders [EMAIL PROTECTED] To: Tomcat Users List tomcat-user@jakarta.apache.org Sent: 20 May 2005 8:36 PM Subject: Re: Accessing images through FrontController Servlet Do you have any logs of what's going on? Also, make sure the pages are using the c:url / tag (or equivalent), as the image paths need to be relative to the url that the client browser see - should be able to hard code the path to be /ntrr/images/whatever.jpg To check for bad paths first view page source from your browser, then you can get the image urls and see if they map to the correct path. There are also some nice tools that you can run to see what's going on, for instance the Live Headers extension for Firefox, or Ethereal for a more general solution William BC Crandall wrote: Hello, I'm starting a new project, using a FrontController servlet (http://java.sun.com/j2ee/patterns/FrontController.html), and am unable to access image files. My understanding is that each img invokes another call to the server/servlet, which, due to the mapping in web.xml, is channeled through the controller servlet, which rejects the call because it does not point to a sub-servlet. How can I access images in webapps/ntrr/images/ ? My web.xml: web-app servlet servlet-name controller /servlet-name servlet-class org.ntrr.core.ControlServlet /servlet-class /servlet servlet-mapping servlet-name controller /servlet-name url-pattern /* /url-pattern /servlet-mapping /web-app I have tried, without success, adding: init-param param-nameimageUrl/param-name param-valuehttp://localhost:8080/ntrr/images//param-value /init-param The files in webapps/ntrr/images/ ARE accessible from webapps/ntrr/css/ntrr.css, when called as background page images, for example. Any suggestions welcomed. Thanks, -BC William BC Crandall bc.crandall [around] earthlink.net - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Robert r. Sanders Chief Technologist iPOV (334) 821-5412 www.ipov.net - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- You can lead a horse to water but you cannot make it float on its back. ~Dakota Jack~ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Accessing images through FrontController Servlet
Thanks Robert, Hard-coding the images works fine, but I'm leery of this, as they will of course all need to be changed when the app goes up on a public server; changes could be localized, but... Is there really no way to declare img calls in the web-app that would allow images to use relative path names? The init-param 'imgURL' sounds like it should allow this, but I'm not familiar with it. Thanks for your suggestion, which gets things moving again. Thanks too for the pointer to Ethereal; looks like a useful tool. Best, -BC William BC Crandall bc.crandall [around] earthlink.net - Original Message - From: Robert r. Sanders [EMAIL PROTECTED] To: Tomcat Users List tomcat-user@jakarta.apache.org Sent: 20 May 2005 8:36 PM Subject: Re: Accessing images through FrontController Servlet Do you have any logs of what's going on? Also, make sure the pages are using the c:url / tag (or equivalent), as the image paths need to be relative to the url that the client browser see - should be able to hard code the path to be /ntrr/images/whatever.jpg To check for bad paths first view page source from your browser, then you can get the image urls and see if they map to the correct path. There are also some nice tools that you can run to see what's going on, for instance the Live Headers extension for Firefox, or Ethereal for a more general solution William BC Crandall wrote: Hello, I'm starting a new project, using a FrontController servlet (http://java.sun.com/j2ee/patterns/FrontController.html), and am unable to access image files. My understanding is that each img invokes another call to the server/servlet, which, due to the mapping in web.xml, is channeled through the controller servlet, which rejects the call because it does not point to a sub-servlet. How can I access images in webapps/ntrr/images/ ? My web.xml: web-app servlet servlet-name controller /servlet-name servlet-class org.ntrr.core.ControlServlet /servlet-class /servlet servlet-mapping servlet-name controller /servlet-name url-pattern /* /url-pattern /servlet-mapping /web-app I have tried, without success, adding: init-param param-nameimageUrl/param-name param-valuehttp://localhost:8080/ntrr/images//param-value /init-param The files in webapps/ntrr/images/ ARE accessible from webapps/ntrr/css/ntrr.css, when called as background page images, for example. Any suggestions welcomed. Thanks, -BC William BC Crandall bc.crandall [around] earthlink.net - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Robert r. Sanders Chief Technologist iPOV (334) 821-5412 www.ipov.net - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Accessing images through FrontController Servlet
Do you have any logs of what's going on? Also, make sure the pages are using the c:url / tag (or equivalent), as the image paths need to be relative to the url that the client browser see - should be able to hard code the path to be /ntrr/images/whatever.jpg To check for bad paths first view page source from your browser, then you can get the image urls and see if they map to the correct path. There are also some nice tools that you can run to see what's going on, for instance the Live Headers extension for Firefox, or Ethereal for a more general solution William BC Crandall wrote: Hello, I'm starting a new project, using a FrontController servlet (http://java.sun.com/j2ee/patterns/FrontController.html), and am unable to access image files. My understanding is that each img invokes another call to the server/servlet, which, due to the mapping in web.xml, is channeled through the controller servlet, which rejects the call because it does not point to a sub-servlet. How can I access images in webapps/ntrr/images/ ? My web.xml: web-app servlet servlet-name controller /servlet-name servlet-class org.ntrr.core.ControlServlet /servlet-class /servlet servlet-mapping servlet-name controller /servlet-name url-pattern /* /url-pattern /servlet-mapping /web-app I have tried, without success, adding: init-param param-nameimageUrl/param-name param-valuehttp://localhost:8080/ntrr/images//param-value /init-param The files in webapps/ntrr/images/ ARE accessible from webapps/ntrr/css/ntrr.css, when called as background page images, for example. Any suggestions welcomed. Thanks, -BC William BC Crandall bc.crandall [around] earthlink.net - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Robert r. Sanders Chief Technologist iPOV (334) 821-5412 www.ipov.net
