Download BLOB from report

Hi,
I would like to add a download link into a report for each row so that the user can download a BLOB. I have created a column in which to add a column link which when clicked will provide a popup which gives the user a choice of whether to save or open the file.
I can get this to work on a static file by adding "p?n=7101305566584499" to the URL field in the column link section or the report column, but cannot get it to work on a dynamically-created file. I have written a procedure to create a file of the BLOB and can get the BLOB to be opened in the browser if I add to the URL field: "#OWNER#.fossilapp_pkg.download_image_jpeg?p_image_id=#Download#" - I know, therefore, that both the file-generating procedure and the reference to it work. However, I don't want the image to be opened in the browser, but instead would like a popup to appear asking the user to save or open the file.
If I put "p?n=#OWNER#.fossilapp_pkg.download_image_jpeg?p_image_id=#Download#" into the URL field I get the following error when I click on the column link: "The requested URL /pls/apex/p was not found on this server."
Any ideas?
Thanks,
Lucy

Hi,
I have found the problem - very simple really! I copied and modified a custom download procedure from somewhere on the forum and I have just noticed that 'Content-Disposition' was incorrectly spelled as 'Content-desposition'. Correcting this error means it now works!
Thanks for your help - yes, what you had on your website was exactly what I required. Sorry for adding random stats into it, though it was nice to 'win' £100,000! I couldn't find an obvious way to delete the stats I had added, but feel free to delete them and my profile (username=Lucy).
Cheers,
Lucy

Similar Messages

Downloading BLOB from a table.

Hello,
First I want to say thatnks for such a great tool like HTMLDB.
Question is:
How do I download BLOB from a table. What I am trying to do is. I am uploading files to a default HTMLDB location (wwv_flow_file_objects$) and moving the records to different table (delete file from wwv_file_objects$). Then I would like to be able to download that blobs from a DB by following some link. And I need it to be secure, user have to authenticate to do it. I got to the point where I created process (before header) to download the file. But I am having hard time passing some variables to that process in URL. Can some one advice me on the best practice of doing it. And also if it is a right thing to use before header process to put my own header and start uploading blob in html db. The main reason I do not whant to use DAD for that is simple security issue and ability of storing of the BLOBs only in one table. I prefer to upload it to a temporary location and then move it to other table(s). Then I need to be able to retriev the files back from those tables without moving them around.
Any help is greatly appriciated

i think i see what you're asking, but i'll step through the pieces just to make sure i cover your issue:
it sounds as if you have a procedure that successfully calls wpg_docload.download_file to get your blob out of your images table. for this explanation, lets just say your images table has the same table structure as wwv_flow_files created with something like...
create table myfiles as select * from wwv_flow_files where rownum < 3;
....and let's say your download proc that passed the blob from your myfiles table to wpg_docload.download_file looked something like...
create or replace procedure getmyfile(
p_id in varchar2,
p_mime_type in varchar2 default null)
as
l_lob blob;
l_mimetype varchar2(48);
l_mime_charset varchar2(255);
l_filename varchar2(400);
begin
select mime_type, blob_content, filename, file_charset
into l_mimetype, l_lob, l_filename, l_mime_charset
from myfiles
where id = p_id;
if l_mime_charset is not null then
owa_util.mime_header( l_mimetype, FALSE, l_mime_charset );
else
owa_util.mime_header( l_mimetype, FALSE );
end if;
htp.p('Content-length: ' || dbms_lob.getlength( l_lob ));
htp.p('Content-Disposition: attachment; filename="' ||
wwv_flow_utilities.escape_url( p_url => l_filename, p_url_charset => 'utf-8') || '"');
owa_util.http_header_close;
wpg_docload.download_file( l_lob );
end;
...then it sounds as if this is where you start running into issues. to be able to call this procedure from the url, you'd have to grant execute on your getmyfile proc to the db user that your modplsql DAD uses to access your db. once that user was given access to run getmyfile, you could access your files in myfiles by calling a URL like...
http://myserver.com/pls/mydad/myschema.getmyfile?p_id=1005529367869246
...where p_id is the unique id associated with your blob in getmyfiles (you could, of course, use whatever method you want to uniquely identify that file and adjust your select-into statement w/in your getmyfile procedure). so that's all fine and dandy, but it sounds as if you want users to have to authenticate into your html db application before they can access a blob in your images table. it also sounds as if you're on the right track to do so by putting your procedure call in a before_header html db process. you could quite easily call your getmyfile procedure in such an html db pl/sql before_header process with something like...
begin
getmyfile (p_id => 1008411584930314);
end;
...which would cause your page to just show the blob associated with the id you passed to getmyfile. because you're now accessing your blob table through html db parsing as your application schema owner, you'd no longer need to grant execute on getmyfile to your modplsql DAD's db user. that eliminates most of the security hole to which you were referring. now that you're calling getmyfile from w/in an html db process, you can take advantage of all the other html db perks such as applying conditions and an authorization scheme to the html db process to really lock things down. finally, you asked about firing your process before_header versus other firing points. before_header is a good way to go, but if you really wanted to execute other procedural logic on your page before showing the blob (and you didn't want to implement that code as before_header processes that fire sequentially before your getmyfile call),you could just throw an htp.init in right before your getmyfile call to clear out your http buffer like so...
begin
htp.init;
getmyfile (p_id => 1008411584930314);
end;
...hope this helps,
raj

Downloading data from report painter report in background

Hi Guy,
I have a requirement where in have to schedule the job and download the data on application server from report which is been written report writter. there is an option to save the export paramater but i can download it only in forground.
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Hi,
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Download BLOB in Report causes ORA-06502

I built a page with a report showing a table of files and some more information.
When i view the page the report shows the ORA-06502 error.
I use this format to build the download link:
DOWNLOAD:OVV_HANDBUCH:DATEI:ID::MIMETYPE:DATEINAME:::attachment:Herunterladen
The Table is called ovv_handbuch
The PK column: id
The blob column: datei
The filename column: dateiname
The mimetype column: mimetype
Does perhaps the charset WE8MSWIN1252 of the database could be a problem?

Hi,
You can install Demonstrative application to your workspace and check there how that report can be done
To install demo app:
Home>Create Application and select Demonstration Application
Check then page 3 report
Br,Jari

Patching: HTTP errors when downloading blobs from proxy controller to agent

Hi all,
I have a persistent issue which I can't figure out. Oracle support aren't much help.
When applying a Recommended Baseline patchset to our managed Solaris 10 servers, I have observed that blobs are downloaded to the target servers at a rate of 1-2 blobs per minute. I consider this to be quite slow, but that's not my main problem.
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HTTP request failed. Reason: Moved temporarily.
HTTP request failed. Reason: Bad gateway.
Eventually, the blob download job fails completely...
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Change download columns from report

Hi! I have a report, with some columns and I'd like to change the columns when downloading as csv file.
Let's say that I have a report with col1,col2, col3,col4 and some hidden columns: col5, col6, col7. When I download the file I'd like to have only
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Thanks!

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http://tinypic.com/jzya2t.jpg
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Downloading BLOB from DB to local filesystem

We have a requiremnt to provide a JSP page that allows user to select a file that is stored as a BLOB in an Oracle 9 DB and download to local machine.
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Oracle 9i DB
JDev 9.052
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Thanks,
Mike

Thanks, Francois.
Is there another way?
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Message was edited by:
MarioK

Downloading files from report on page

on apex.oracle.com I have an app and I have uploaded a few pdf files via the "shared components->files->static files" The pdf name is ssgr.pdf I've got a table within my schema for item information and one of the columns references these files. I have the pdf name "ssgr.pdf" stored for one of my items.
Can I not use a column link and a url target set like p?n=#WORKSPACE_IMAGES##COLUMN_NAME# to download those files?
When I hover over my link column this is the url that is displayed
http://apex.oracle.com/pls/otn/p?n=wwv_flow_file_mgr.get_file?p_security_group_id=3505878102606702610&p_fname=SSGR.pdf
Thanks,
Ben Alvey

sorry, I just answered my own question. I removed the p?n= portion from the link column url, now when I click it I get an inline pdf. sweet!

Printing Word Document stored in BLOB from Reports

I have stored images and MS-Word documents in the DB in a BLOB column. Using reports 6, I am able to print the images by setting the File Format property of the item to Image. What I need to know is how can I print the Word document that has been stored in the DB using reports? Any alternative suggestions welcome...
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Aparna

Hi Aparna,
I have tried the same with CLOB instead BLOB.
(MS Word)
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If you have found an answer, please let me know.
Tissa
([email protected])
null

Download file from button

Hi Guys,
I followed thread 214709 (download blob from table) and had similar code in my Portal app. I have a stored procedure with almost identical code. My page has a drop down list which shows the last 12 sales files a customer can download. Behind it I have a Download Button.
The procedure gets executed but the download window does not show up. If I put the call in a before header it actually works so nothing is wrong with the code. Where do I have to put the call and do I have create an additional branch. After download theu user should stay on that page. I actually have 3 sections with 3 buttons to download or request a file to be emailed.
So my last question is what is best practice in this situation.

the thread you followed...
Downloading BLOB from a table.
...showed you how to make a procedure similar to our P procedure that's used to fetch blobs out of a document table. once your file download procedure works, you can call it from the web in one of three main ways:
1) using an image tag as shown in File Upload ( again! )
2) using an anchor tag as shown at the top of File download-upload
3) directly calling it from the URL. this is effectively the same thing as clicking on a link from an anchor tag in number 2, above.
it sounds as if your download procedure's working because you said it works if you call it before_header. i'm gathering from your post that you are currently trying to call your download procedure in some kind of after submit process. you're finding that your procedure's executing, but you don't see your file. i just set up a test case for this and found that if my page didn't have a branch on it, my after_submit process did render my image correctly. it doesn't sound as if this is what you're shooting for, though. it sounds as if you just want a select list that allows users to select a particular doc. after selecting a doc and clicking a button on your page, the user is allowed to download the doc while still being left on your original page. if so, how about creating a button that calls a javascript procedure that checks the value of your select list and returns a rendering of that image? if that's what you're after, you could do it by adding javascript like...
<script language="JavaScript" type="text/javascript">
function viewSelImage (theItem)
var selVal = document.getElementById(theItem).value;
var url;
url = 'getmyfile?p_id=' + selVal;
location.href=url;
</script>
...which, of course, assumes your document download procedure is publicly executable and named "getmydoc". it also assumes that getmydoc accepts p_id which corresponds to your document table. then, assuming your select list item is called P1_MY_IMAGE_IDS, you could add a button to your page that has a URL target of...
javascript:viewSelImage('P1_MY_IMAGE_IDS');
...and that would popup a call to your document download procedure while leaving the user on the same page... which i believe is what you're after.
hope this helps,
raj

BLOB download from report region in translated application does not work

We created an application (APEX 3.1.2) with a base language dutch (300) and a translated application en-uk (3001). The problem is that in the translated application downloading BLOB's from a report region does not work and results in an error (page cannot be found).
The query source for the region is:
select naam
, dbms_lob.getlength(bestand)
, mimetype
from bos_documentatie
The column 'dbms_lob.getlength(filename)' is defined as a 'BLOB Download Format Mask' with the following setting:
DOWNLOAD:BOS_DOCUMENTATIE:BESTAND:NAAM::MIMETYPE:FILENAME:::attachment:Open
The URL's to the BLOB documents are different between the dutch and en-uk application:
dutch:
http://nldvnr01ux002:7792/pls/xvapexd/apex_util.get_blob?s=4260101889649158&a=300&c=12455124581749125&p=1001&k1=Application Multi Language.doc&k2=&ck=A24A5EA6903C5A9603B86D30F128F4DE&rt=CR
en-uk:
http://nldvnr01ux002:7792/pls/xvapexd/apex_util.get_blob?s=4260101889649158&a=300&c=12455124581749125.3001&p=1001&k1=Application Multi Language.doc&k2=&ck=7FF0C64FDD48A4D7A6892CFB2B6BCA57&rt=CR
As you can see the c parameter for the en-uk version has a '.3001' at the end, the internal ID of the translated application. I don't know if this can be the cause of the problem?

Hi Peter,
Thanks for the suggestion. However we have a lot of APEX applications build in that same APEX version (one development database) and upgrading now to a higher APEX version would mean we would have to re-test all our applications and upgrade all our test and production environments, just for this bug. And, maybe the higher APEX version may not solve our problem.
Thanks and regards,
Patrick

Downloading blob content from a custom table

In our hosted Apex application, the following code from the Application Express Developer's Guide works great for allowing a user to download blob content from one of our custom tables via a download button. However, the code doesn't work on the Oracle Cloud because the "owa_util" package is no longer available. The code is as follows:
CREATE OR REPLACE PROCEDURE download_my_file(p_file in number) AS
v_mime VARCHAR2(48);
v_length NUMBER;
v_file_name VARCHAR2(2000);
Lob_loc BLOB;
BEGIN
SELECT MIME_TYPE, BLOB_CONTENT, name,DBMS_LOB.GETLENGTH(blob_content)
INTO v_mime,lob_loc,v_file_name,v_length
FROM file_subjects
WHERE id = p_file;
-- 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: attachment; filename="'||replace(replace(substr(v_file_name,instr(v_file_name,'/')+1),chr(10),null),chr(13),null)|| '"');
-- close the headers
owa_util.http_header_close;
-- download the BLOB
wpg_docload.download_file( Lob_loc );
end download_my_file;
Besides using web services, does anyone know of a way to do this? Is there a way to add access to the "owa_util" package in the cloud? I have also tried apex_util.get_blob_file_src but that is also unavailable in the Oracle Cloud.
Thanks,
Steve

Following Joel's advice:
The way I solved this was to split the code between two page processes and one application process. The download button first calls a page process to move the report data into a blob column and then calls another page process which is of "run application process" type. This calls the application level process where the download code, shown below, is called.
Notice the following changes to the code from the one posted earlier (also from Joel)
1) added sys.htp.init;
2) "sys." to all htp, owa and wpg_docload calls
3) added apex_application.stop_apex_engine; after the wpg_docload statement at the bottom of the script.
Now the download button launches a "save as" dialog box and the report content is downloaded to the client.
The code now looks like:
CREATE OR REPLACE PROCEDURE download_my_file(p_file in number) AS
v_mime VARCHAR2(48);
v_length NUMBER;
v_file_name VARCHAR2(2000);
Lob_loc BLOB;
BEGIN
SELECT MIME_TYPE, BLOB_CONTENT, name,DBMS_LOB.GETLENGTH(blob_content)
INTO v_mime,lob_loc,v_file_name,v_length
FROM oehr_file_subject
WHERE id = p_file;
-- 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
sys.htp.init;
sys.owa_util.mime_header( nvl(v_mime,'application/octet'), FALSE );
-- set the size so the browser knows how much to download
sys.htp.p('Content-length: ' || v_length);
-- the filename will be used by the browser if the users does a save as
sys. htp.p('Content-Disposition: attachment; filename="'||replace(replace(substr(v_file_name,instr(v_file_name,'/')+1),chr(10),null),chr(13),null)|| '"');
-- close the headers
sys.owa_util.http_header_close;
-- download the BLOB
sys.wpg_docload.download_file( Lob_loc );
apex_application.stop_apex_engine;
end download_my_file;
Thanks Joel for your help.
Steve

BLOBs from different tables on one report

Hi,
I think the declarative BLOB support enhancement in 3.1 is really great. I am running into a problem with a report that joins two tables that both have BLOB columns. I have a Letters table and a Response table. The Response table has a FK linkage to the Letters table with the Letters table being the referenced table. I have a report that joins the Letters & Response tables and provides download links for the BLOBs in both tables. However on the report, only one of the link works at a given point in time. Both the links work fine in isolation (if the other link is commented out in the query).
I am using the APEX_UTIL.GET_BLOB_FILE_SRC function to download the files. Has anyone tried using this function to download files from two different tables in a single report?
TIA,
Ramesh

Ramesh,
Is this application on apex.oracle.com by any chance? I just went to test there and am having all sorts of trouble with declarative display of BLOBs in a report but on our dev box, two works fine (except that the link for both is the default rather than what I selected).
-- Sharon

Download data from interactive report

Hi all. I'm on apex 3.1.1.00.09.
I have this problem: when I download data from interactive report I can download only in CSV and PDF. If I try to download into pdf it creates a file of only 1 KB.
I would know if I must configure my apex in order to download correctly in pdf and if I must configure it in order to download in doc and xls format.
Thanks all for collaboration,
Fabrizio

Thank you for your reply.
I am able to download the csv file, but my problem is: I don't want the column headings to show.
Is it possible to download only the data, not the column headings?

Downloading data from a BLOB Field using mod_plsql

Hi,
I am trying to use the mod_plsql to download data from a blob field, I have a web page where I can pick the file name to be downloaded from the documents table This table has the BLOB field that has the Data formatted in a text file format(contains carriage returns), when I open it up in the browser it is displaying it correctly , but when I right click on the file name and choose "Save Target As" and save it as text file it is ignoring the carriage returns and displaying entire blob in one line.
Can somebody help me figure out why it's not recognizing the carriage returns?
Any help would be greatly appreciated.
Thanks

Hi and welcome to the forum.
Is there a way to retrieve data from a blob field and save it to temp table.Why would you want to do that?
Can you provide some more details regarding your requirement?
(Don't forget to mention your database version as well)
Also, I wonder why you've added a 'decompress' tag to your question?
edit, after seeing Tubby's reply
Dang, the connection must be frozen here ;)
Edited by: hoek on Jan 6, 2010 9:06 PM

Download BLOB from report

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