I'm trying to login to a java website using WWW::Scripter module. Using the WWW::Mechanize module works fine, but once authenticated the site has JavaScript functions that I need to call - hence needing Scripter.
After doing a large amount of troubleshooting I have found that the difference in packets sent from the click() event are the Content-Type varaibale.
Mechanize has: Content-Type: application/x-www-form-urlencoded\r\n
but Scripter has: Content-Type: application/x-www-form-urlencoded; charset="ISO-8859-1"\r\n
(This is viewed using WireShark)
This explains the error I am receiving from the website which is: 

> error message: "ISO-8859-1" error stack trace:
> java.nio.charset.IllegalCharsetNameException: "ISO-8859-1"
>         at java.nio.charset.Charset.checkName(Charset.java:305)
>         at java.nio.charset.Charset.lookup(Charset.java:439)
>         at java.nio.charset.Charset.forName(Charset.java(Inlined Com
+piled Code))
> 
>         at java.lang.StringCoding$DecoderCache.makeDecoder(StringCod
+ing.java(Com
> piled Code))
>         at java.lang.StringCoding$1.run(StringCoding.java(Compiled C
+ode))
>         at java.security.AccessController.doPrivileged1(Native Metho
+d)
>         at java.security.AccessController.doPrivileged(AccessControl
+ler.java(Com
> piled Code))
>         at java.lang.StringCoding$DecoderCache.getDecoder(StringCodi
+ng.java(Comp
> iled Code))
>         at java.lang.StringCoding.getDecoder(StringCoding.java(Inlin
+ed Compiled Code))
>         at java.lang.StringCoding.decode(StringCoding.java(Compiled 
+Code))
>         at java.lang.String.<init>(String.java(Compiled Code))
>         at java.lang.String.<init>(String.java(Inlined Compiled Code
+))
>         at com.ibm.ws.webcontainer.servlet.RequestUtils.parsePostDat
+a(RequestUti
> ls.java(Compiled Code))
>         at com.ibm.ws.webcontainer.srt.SRTServletRequest.parseParame
+ters(SRTServ
> letRequest.java(Compiled Code))
>         at com.ibm.ws.webcontainer.srt.SRTServletRequest.getParamete
+rNames(SRTSe
> rvletRequest.java(Compiled Code))
>         at javax.servlet.ServletRequestWrapper.getParameterNames(Ser
+vletRequestW
> rapper.java(Compiled Code))
>         at org.apache.struts.util.RequestUtils.populate(RequestUtils
+.java(Compil
> ed Code))
>         at org.apache.struts.action.RequestProcessor.processPopulate
+(RequestProc
> essor.java(Compiled Code))
>         at org.apache.struts.action.RequestProcessor.process(Request
+Processor.ja
> va(Compiled Code))
>         at org.apache.struts.action.ActionServlet.process(ActionServ
+let.java(Inl
> ined Compiled Code))
>         at org.apache.struts.action.ActionServlet.doPost(ActionServl
+et.java(Comp
> iled Code))
>         at javax.servlet.http.HttpServlet.service(HttpServlet.java(C
+ompiled Code
> ))
>         at javax.servlet.http.HttpServlet.service(HttpServlet.java(C
+ompiled Code
> ))
>         at com.ibm.ws.webcontainer.servlet.StrictServletInstance.doS
+ervice(Stric
> tServletInstance.java(Compiled Code))
>         at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet._s
+ervice(Stric
> tLifecycleServlet.java(Compiled Code))
>         at com.ibm.ws.webcontainer.servlet.IdleServletState.service(
+StrictLifecy
> cleServlet.java(Compiled Code))
>         at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet.se
+rvice(Strict
> LifecycleServlet.java(Inlined Compiled Code))
>         at com.ibm.ws.webcontainer.servlet.ServletInstance.service(S
+ervletInstan
> ce.java(Compiled Code))
>         at com.ibm.ws.webcontainer.servlet.ValidServletReferenceStat
+e.dispatch(V
> alidServletReferenceState.java(Compiled Code))
>         at com.ibm.ws.webcontainer.servlet.ServletInstanceReference.
+dispatch(Ser
> vletInstanceReference.java(Inlined Compiled Code))
>         at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter
+(WebAppFilte
> rChain.java(Compiled Code))
>         at com.infostream.web.filters.HibernateSessionFilter.doFilte
+r(HibernateS
> essionFilter.java(Compiled Code))
>         at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFi
+lter(FilterI
> nstanceWrapper.java(Compiled Code))
>         at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter
+(WebAppFilte
> rChain.java(Compiled Code))
>         at com.infostream.web.filters.IdentificationFilter.doFilter(
+Identificati
> onFilter.java(Compiled Code))
>         at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFi
+lter(FilterI
> nstanceWrapper.java(Compiled Code))
>         at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter
+(WebAppFilte
> rChain.java(Compiled Code))
>         at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.ha
+ndleWebAppDi
> spatch(WebAppRequestDispatcher.java(Compiled Code))
>         at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.di
+spatch(WebAp
> pRequestDispatcher.java(Compiled Code))
>         at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.fo
+rward(WebApp
> RequestDispatcher.java(Compiled Code))
>         at com.ibm.ws.webcontainer.srt.WebAppInvoker.doForward(WebAp
+pInvoker.jav
> a(Compiled Code))
>         at com.ibm.ws.webcontainer.srt.WebAppInvoker.handleInvocatio
+nHook(WebApp
> Invoker.java(Compiled Code))
>         at com.ibm.ws.webcontainer.cache.invocation.CachedInvocation
+.handleInvoc
> ation(CachedInvocation.java(Compiled Code))
>         at com.ibm.ws.webcontainer.cache.invocation.CacheableInvocat
+ionContext.i
> nvoke(CacheableInvocationContext.java(Compiled Code))
>         at com.ibm.ws.webcontainer.srp.ServletRequestProcessor.dispa
+tchByURI(Ser
> vletRequestProcessor.java(Compiled Code))
>         at com.ibm.ws.webcontainer.oselistener.OSEListenerDispatcher
+.service(OSE
> Listener.java(Compiled Code))
>         at com.ibm.ws.webcontainer.http.HttpConnection.handleRequest
+(HttpConnect
> ion.java(Compiled Code))
>         at com.ibm.ws.http.HttpConnection.readAndHandleRequest(HttpC
+onnection.ja
> va(Compiled Code))
>         at com.ibm.ws.http.HttpConnection.run(HttpConnection.java(Co
+mpiled Code)
> )
>         at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java(Com
+piled Code))

[download]
The code I'm using to test the login is: 
    #!/usr/bin/perl -w
      
    use WWW::Scripter;
    
    my $urlLogin = "XXX";
        
    my $viper = WWW::Scripter->new();
            
    $viper->use_plugin('JavaScript');
    
    $viper->get($urlLogin);
          
    $viper->form_name('loginForm');
          
    $viper->field(username => "xxx");
    $viper->field(password => "xxx");
    
    $viper->click();

[download]
As mentioned before this works fine if I use WWW::Mechanize instead of WWW::Scripter. Can anyone suggest what I can do to remove the charset field in the Content-Type of the packet being POST'ed.

In reply to Login to Java site with WWW::Scripter charset issue by mikedeklerk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.