Stored in the BLOB column display PDF problem

Hello everyone.

I tried to follow this tutorial http://asktom.oracle.com/pls/asktom/f?p=100:11:0:p11_question_id:232814159006 on the display of PDF files stored in BLOB columns. This is done on Apex 4.2, with my DB 11 g running. I have my procedure, which I will post below:
create or replace procedure "PDF" (p_id IN gvo_documents.doc_id%type)
is
    l_lob    blob;
    l_amt    number default 30;
    l_off   number default 1;
    l_raw   raw(4096);
begin
    select contents into l_lob
        from gvo_documents 
         where doc_id = p_id;

 -- make sure to change this for your type!
    owa_util.mime_header( 'application/pdf' );


    begin
        loop
          dbms_lob.read( l_lob, l_amt, l_off, l_raw );
          htp.prn( utl_raw.cast_to_varchar2( l_raw ) );
          l_off := l_off+l_amt;
          l_amt := 4096;            
    end loop;
        exception
           when no_data_found then 
              NULL;
        end;

end;
I am trying to run this through a region dynamic PL/SQL, and even if I don't get any error, the content displayed is a huge mess of truncated text and strange characters. I tried to run this procedure on many other types of documents, including word and jpeg image files, all with the necessary changes in my inside, and regardless of what I use, I always get a big mess of strange characters. Does anyone have information or ideas why this is happening?

If I understand correctly, your needs must be broken down into two problems:
1) click the link that opens a window showing a new APEX page
(2) an APEX page displays the document, download it not.

I did not (yet) #1.
However, you can generate a URL that points to the new page in the select for the report.

It's a related issue, but no response yet:
Open the pdf file in the browser window

The key is to target = "_blank" to the anchor tag.
To generate the URL, you must use the APEX_UTIL.prepare_URL () function.

If this does not work, a dynamic Action that makes magical things of JavaScript may be necessary.

# 2, I lost the URL that showed how to display a PDF file in a page "form.
From what I remember:
Start with a blank page with a pristine area of HTML (all items will in the HTML area)
Add an element to the PK/annual
part I forgot Create a Data Manipulation process
-Automated row Fetch
-By loading - after the header
-(stuff for your table/view)
part I forgot Create a (I think) "File browser" item type. For the parameters:
-Storage of Type "BLOB column specified in the Source element" (and put the name of the BLOB column)
-MIME Type column: (column name) - since there are several types, this is a MUST HAVE
-Filename column: (column name) - I highly recommend you have this.
-Provision of content is INLINE<-- this="" is="" the="">

In addition, you will need a browser for each of the Types MIME Plugin (if not, the browser may try to "Download" the file)
Browsers can manage the types of images internally. Plugin Adobe can handle PDF files. I do not know Word/Excel.

Yet once again, I don't remember the exact details, but that should cover most of it.

MK

Tags: Database

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----------------- ------------- -------- ------- -------- 
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