How to display XML document

Question

Hello All.
I am using Apex 3.0.1.x. I've uploaded an XML file into an XMLTYPE column in a table and am now trying to display this XML data in an Apex report region.
I saw a beautiful example of doing this in Denes Kubicek's wonderful demo app 31517, page 90. Here's the link to this page:
http://htmldb.oracle.com/pls/otn/f?p=31517:90
I copied the procedure code he uses to display the XML into a package. Here's the code I'm using:
<pre>
PROCEDURE DISPLAY_XML (P_ID IN INTEGER)
AS
V_PROC VARCHAR2(100);
V_ERRMSG VARCHAR2(300);
V_MIME VARCHAR2 (48);
V_LENGTH NUMBER;
V_FILE_NAME VARCHAR2 (2000);
V_LOB_LOC BLOB;
XML_TO_BLOB_ERROR EXCEPTION;
BEGIN
V_PROC := 'ONLINE_MODEL_PKG.DISPLAY_XML_DEVICES';
V_ERRMSG := NULL;
SELECT DECODE(V('APP_USER'),NULL,'N','Y')
INTO V_HTML_FLAG
FROM DUAL;
BEGIN
SELECT X.MIME_TYPE,
PROC_FUNC_PACK.CLOB2BLOB(X.DEVICE_XML.GETCLOBVAL()),
X.DEVICE_FILENAME
INTO V_MIME,
V_LOB_LOC,
V_FILE_NAME
FROM XML_DOCS X
WHERE X.ID = P_ID;
EXCEPTION
WHEN OTHERS THEN
V_ERRMSG := SUBSTR('ERROR ('||V_PROC||'): DURING DISPLAY OF XML DATA: '||SQLERRM, 1, 300);
RAISE XML_TO_BLOB_ERROR;
END;
V_LENGTH := DBMS_LOB.GETLENGTH (V_LOB_LOC);
-- set up HTTP header
-- use an NVL around the mime type and
-- if it is a null set it to application/octect
-- application/octect may launch a download window from windows
OWA_UTIL.MIME_HEADER (NVL (V_MIME, 'application/octet'), FALSE);
-- SET THE SIZE SO THE BROWSER KNOWS HOW MUCH TO DOWNLOAD
HTP.P ('Content-length: ' || V_LENGTH);
-- THE FILENAME WILL BE USED BY THE BROWSER IF THE USERS DOES A SAVE AS
HTP.P ( 'Content-Disposition: filename="'
|| V_FILE_NAME
|| '"'
-- CLOSE THE HEADERS
OWA_UTIL.HTTP_HEADER_CLOSE;
-- DOWNLOAD THE BLOB
WPG_DOCLOAD.DOWNLOAD_FILE (V_LOB_LOC);
EXCEPTION
WHEN XML_TO_BLOB_ERROR THEN
V_ERRMSG := PROC_FUNC_PACK.FORMAT_MSG(V_ERRMSG, V_HTML_FLAG);
RAISE_APPLICATION_ERROR(-20010, V_ERRMSG);
WHEN OTHERS THEN
V_ERRMSG := SUBSTR('ERROR ('||V_PROC||'): '||SQLERRM, 1, 300);
V_ERRMSG := PROC_FUNC_PACK.FORMAT_MSG(V_ERRMSG, V_HTML_FLAG);
RAISE_APPLICATION_ERROR(-20020, V_ERRMSG);
END DISPLAY_XML_DEVICES;
</pre>
I then invoke this packaged procedure in an iframe, just like what Denes is doing. I put the following code in my report region source field:
<pre>
DECLARE
v VARCHAR2 (500);
BEGIN
v :=
'SELECT '
|| '''<iframe src="#OWNER#.ONLINE_MODEL_PKG.DISPLAY_XML?p_id='
|| :p53_id
|| '"'
|| ' height="800" width="950"></iframe>'''
|| ' document_display'
|| ' FROM DUAL';
RETURN v;
END;
</pre>
When I run the report in Intenet Explorer (version 6.x), I get a strange security warning popup asking if I want to display unsecure items. When I click "Yes", the report region shows up with a "Could not find web page" error 404 inside the report region.
I then tried running the app in Fire Fox (version 2.0.0.15). This time I do not get any security warning, but the report region shows up with the message "Procedure Doesn't Exist".
Another page in my app calling other procedures in my package, and so, I know that Apex is "seeing" the package.
Does anyone know why I'm seeing these strange things? And, is there, perhaps, another way to display an XML document in an Apex page?
Thank you.
Elie

Answer 1

Hi Arthur,
I assume you are using EP6.0, below SP3.
The XML Forms can be displayed using standard SAP layouts only. There is a special type of servlet. This alongwith the CSS is applied when you click to display the "Show" form.
As far as I know, there is no other way to display as you want to. You can probably get more help by specifying the exact scenario.
Hope this helps you.
Regards,
Sagar