Notes/Domino HTML parsen

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VitaminB - 26 Apr 2006 10:54 GMT

Hello guys,

I want to parse a HTML Frameset (by Java) which is generated by a Lotus
Domino server. When I use a plain text HTML generated by Domino server,
my parser works fine. In contrast, then I try to parse the frameset I
get the following exception:

##########
Exception:
##########

java.io.EOFException
    at java.io.DataInputStream.readFully(DataInputStream.java:295)
    at java.io.DataInputStream.readUTF(DataInputStream.java:661)
    at conparse.main(conparse.java:30)
    at conparseTest.testMain(conparseTest.java:17)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:85)
    at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:58)
    at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:60)
    at java.lang.reflect.Method.invoke(Method.java:391)
    at junit.framework.TestCase.runTest(TestCase.java:154)
    at junit.framework.TestCase.runBare(TestCase.java:127)
    at junit.framework.TestResult$1.protect(TestResult.java:106)
    at junit.framework.TestResult.runProtected(TestResult.java:124)
    at junit.framework.TestResult.run(TestResult.java:109)
    at junit.framework.TestCase.run(TestCase.java:118)
    at junit.framework.TestSuite.runTest(TestSuite.java:208)
    at junit.framework.TestSuite.run(TestSuite.java:203)
    at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:478)
    at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:344)
    at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)

###########
Code
###########

public class conparse{

    conparse(){

    }

    public void main(){

        try {

            URL urlobj = new URL("http://dev0004/Test/frame.htm");

            HttpURLConnection uc = null;
            uc = (HttpURLConnection)urlobj.openConnection();
            uc.setUseCaches(false);
            DataInputStream is = new DataInputStream(uc.getInputStream());
            String str =is.readUTF();
            System.out.println(str);

            HTMLEditorKit hKit = new HTMLEditorKit();
            HTMLDocument hDoc = new HTMLDocument();
            hKit.read(is, hDoc, 0);

            HTMLDocument.Iterator it = hDoc.getIterator(HTML.Tag.FONT);

            AttributeSet attSet = it.getAttributes();
            String s = (String)attSet.getAttribute(HTML.Attribute.COLOR);
            System.out.println(s);

            //System.out.println(attSet.getAttributeCount());

        }
    catch ( Exception e ) {
            e.printStackTrace();
        }

    }

}

################
Plain Text HTML:
################

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>

<script language="JavaScript" type="text/javascript">

</script>
</head>
<body text="#000000" bgcolor="#FFFFFF">

<form method="post"
action="/Test/HET/PerformanceTestDB.nsf/ContentRetrival?OpenForm&Seq=1"
name="_ContentRetrival">
<input type="hidden" name="__Click" value="0"><b>Test Page for Content
Retrival</b><br>
<br>
<br>
<font color="#FF0000">Hello, here is some text without a meaning. This
text should show, how a printed</font><br>
</form>
</body>
</html>

#######################################
Frameset HTML (received by Internet Explorer from the Domino Server)
#######################################
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN">
<html>
<head>

<script language="JavaScript" type="text/javascript">

</script>
</head>

<frameset cols="45%,55%">

<frame
src="/Test/HET/PerformanceTestDB.nsf/ContentDeliveryMeasurement?OpenForm">

<frameset rows="1*,1*">

<frame src="/Test/HET/PerformanceTestDB.nsf/DocsInserted?OpenView">

<frame name="docPreviewFrame"
src="/Test/HET/PerformanceTestDB.nsf/select?OpenForm">
</frameset>
</frameset>
</html>

Regards,
Marcus

Reply to this Message

Venkatesh - 27 Apr 2006 04:32 GMT

Think readUTF() expects the length of string at the beginning (The
first 2 bytes are considered to contain the length of the rest of the
string), and that might be causing the problem for u. The best way to
read text is to just loop and read each line, until End of file is
reached.

U can see the source of DataInputStream to get more details

-Venkatesh

Reply to this Message

Chris Uppal - 27 Apr 2006 13:14 GMT

> DataInputStream is = new DataInputStream(uc.getInputStream());
> String str =is.readUTF();

Why are you using a DataInputStream ? And, more specifically, why are you
using readUTF8() ? See the documentation for the method, and you'll see why it
is totally worthless for reading text downloaded from the Net.

-- chris

Reply to this Message

Roedy Green - 27 Apr 2006 19:47 GMT

On Thu, 27 Apr 2006 13:14:08 +0100, "Chris Uppal"
<chris.uppal@metagnostic.REMOVE-THIS.org> wrote, quoted or indirectly
quoted someone who said :

>Why are you using a DataInputStream ? And, more specifically, why are you
>using readUTF8() ? See the documentation for the method, and you'll see why it
>is totally worthless for reading text downloaded from the Net.

see http://mindprod.com/applets/fileio.html
for to generate code that will work.

Signature

Canadian Mind Products, Roedy Green.
http://mindprod.com Java custom programming, consulting and coaching.

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Notes/Domino HTML parsen

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