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Posted to user@struts.apache.org by daiyna <jo...@hotmail.com> on 2008/10/08 19:32:18 UTC
Cannot call servlet from portlet using img tag
I have an imageservlet used to server dynamic images with the following
mapping in the web.xml file:
<servlet-mapping>
<servlet-name>ImageViewer</servlet-name>
<url-pattern>/imageview/*</url-pattern>
</servlet-mapping>
>From within my JSP I can call the servlet using the include tag:
<s:include value="/imageview"/>
but when I try to access it from an img it fails.
<s:url var="imgURL" value="/imageview"/><
img src="${imgURL}" alt="img" width="40", height="40"/> T H I S F A
I L S
I get the following exception:
2008-02-28 20:08:29,096 [http-8080-1 ] WARN OgnlValueStack -
Could not find property [struts.valueStack]
2008-02-28 20:08:29,096 [http-8080-1 ] ERROR Dispatcher -
Could not find action or result
There is no Action mapped for namespace / and action name imageview. -
[unknown location]
at
com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:178)
at
org.apache.struts2.impl.StrutsActionProxy.prepare(StrutsActionProxy.java:60)
at
org.apache.struts2.impl.StrutsActionProxyFactory.createActionProxy(StrutsActionProxyFactory.java:38)
at
com.opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:47)
at
org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:466)
at
org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:458)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
at
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:619)
im using struts 2.1.2
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Re: Cannot call servlet from portlet using img tag
Posted by Laurie Harper <la...@holoweb.net>.
daiyna wrote:
> I have an imageservlet used to server dynamic images with the following
> mapping in the web.xml file:
>
> <servlet-mapping>
> <servlet-name>ImageViewer</servlet-name>
> <url-pattern>/imageview/*</url-pattern>
> </servlet-mapping>
>
>
>
> From within my JSP I can call the servlet using the include tag:
>
>
> <s:include value="/imageview"/>
What does that do? It makes no sense to put image data in-line in an
HTML page; does your servlet return image data, or is it returning a URL
or something?
> but when I try to access it from an img it fails.
> <s:url var="imgURL" value="/imageview"/><
> img src="${imgURL}" alt="img" width="40", height="40"/> T H I S F A
> I L S
>
>
> I get the following exception:
>
> [...]
Have you looked at the generated HTML? What's the URL in the <img> tag?
Maybe <s:url> is prepending something to the URL that shouldn't be there
for this use case, or appending an unwanted .action suffix or something.
L.
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Re: Cannot call servlet from portlet using img tag
Posted by Laurie Harper <la...@holoweb.net>.
daiyna wrote:
> im sorry this is wrong:
>
> <s:url var="imgURL" value="/imageview"/><
> img src="${imgURL}" alt="img" width="40", height="40"/>
>
> its like:
> <
> img src="/imageview/somepath" alt="img" width="40", height="40"/>
>
> where somepath is the absolute path for the generated image. imageservlet
> was supposed to retrieve the local image to the page
I'm still not clear what /imageview is supposed to do/return, or what
the URL in the generated <img> tag is meant to look like. What do you
expect to see in your browser if you access the following URLs directly:
1. http://host:port/context/imageview
2. http://host:port/context/imageview/somepath
3. http://host:port/context/somepath
How does that differ, in each case, from what you are seeing?
L.
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Re: Cannot call servlet from portlet using img tag
Posted by daiyna <jo...@hotmail.com>.
im sorry this is wrong:
<s:url var="imgURL" value="/imageview"/><
img src="${imgURL}" alt="img" width="40", height="40"/>
its like:
<
img src="/imageview/somepath" alt="img" width="40", height="40"/>
where somepath is the absolute path for the generated image. imageservlet
was supposed to retrieve the local image to the page
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