it is because con.getConnection() returns URLConnection and not
HttpURLConnection()
Regards
Ramesh Kesavanarayanan
Electronic Data Systems
Steeple Reach,
25, Cathedral Road,
91-44-811 3801 to 15 ext :2186
91-44-233 0380 (res)
[EMAIL PROTECTED]
[EMAIL PROTECTED]
-----Original Message-----
From: Donny Philip [mailto:[EMAIL PROTECTED]]
Sent: Friday, January 19, 2001 11:41 AM
To: [EMAIL PROTECTED]
Subject: Re: urgent...
Hello..
Thankx for the inputs.
A small problem still persists
I am getting a class cast exception during runtime(IE4) on the
statement
java.net.HttpURLConnection con
= (java.net.HttpURLConnection)url.openConnection();
What could be the reason.
Enviornment:NT4.0,JDK1.3
thankx.
Kevin Jones <[EMAIL PROTECTED]>@java.sun.com> on 01/19/2001 04:16:00
AM
Please respond to "A mailing list for discussion about Sun
Microsystem's Java Servlet API Technology."
<[EMAIL PROTECTED]>
Sent by: "A mailing list for discussion about Sun Microsystem's Java
Servlet API Technology." <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
cc:
Subject: Re: urgent...
Not on my system -
I've just tried this and I get an exception.
If I call setDoOutput(true);
then write I get POST.
If I don't call setDoOutput(true) then it throws an exception.
Here's the code
java.net.URL url = new java.net.URL(urlString);
java.net.HttpURLConnection con =
(java.net.HttpURLConnection)url.openConnection();
// con.setDoOutput(true);
// con.setRequestMethod("POST");
java.io.OutputStreamWriter writer = new
java.io.OutputStreamWriter(con.getOutputStream());
and here's the exception
java.net.ProtocolException: cannot write to a URLConnection if
doOutput=false - call setDoOutput(true)
at
sun.net.www.protocol.http.HttpURLConnection.getOutputStream(Unknown
Source)
at Client.main(Client.java:22)
This is on W2K with jdk1.3
If i remove the comment on setDoOutput(true) then it works fine.
Try it,
Kevin Jones
DevelopMentor
www.develop.com
> -----Original Message-----
> From: A mailing list for discussion about Sun Microsystem's Java
Servlet
> API Technology. [mailto:[EMAIL PROTECTED]]On Behalf Of
Rob
> Griffin
> Sent: 18 January 2001 22:18
> To: [EMAIL PROTECTED]
> Subject: Re: urgent...
>
>
> > -----Original Message-----
> > From: A mailing list for discussion about Sun Microsystem's Java
Servlet
> > API Technology. [mailto:[EMAIL PROTECTED]]On Behalf Of
Kevin
> > Jones
> > Sent: Friday, 19 January 2001 7:50
> > To: [EMAIL PROTECTED]
> > Subject: Re: urgent...
> >
> >
> > But only for POST or PUT, whcich this code isn't using
>
> Yes it is. Writing to the output stream of a URLConnection forces
> it to do a POST.
>
> >
> >
> > con.setRequestProperty("Content-Type","java-internal"+objs.getClas
> > s().getNam
> > e());
> > ObjectOutputStream out = new
> ObjectOutputStream(con.getOutputStream());
> > out.writeObject(objs);
> >
> > you should call con.setDoOutput(true);
> > or con.setRequestMethod("POST"); // JDK1.3 and above I think
> >
> > In fact the code shouldn't even execute.
> >
> > Thinking about it I assume there should be a call to
> > setDoOutput(true) here
> > somewhere?
>
> ------------- from another post
>
> >> IE returns FileNotFoundException when it can't connect
> >
> >It's not IE that does this. URLConnection converts EVERY error
> code into a
> >FileNotFoundException
>
> Netscape throws an IOException in this case.
>
> >
> > Kevin Jones
> > DevelopMentor
> > www.develop.com
> >
>
> [snip]
>
> Rob Griffin
> Quest Software
>
> E-mail: [EMAIL PROTECTED]
> Web site: http://www.quest.com
>
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