[Zope] Can Zope extract an image (BLOB) from an RDB ?

[Chris McDonough]

I've never done it, and it's not well-documented (ie. I have no idea if
it really works), but I believe the Oracle DA can retrieve BLOBS... Here
the CHANGES.txt file from ZOracleDA:  

Z Oracle DA Releases

  2.2.0

    Added a small feature that allows you to access LOBs in the Oracle 
    database.  To do this, you must have your maximum number of
    results set to '1'.  Otherwise, it won't work.

    In addition, several bugs were resolved.

  2.1.0 

    Based on DCOracle new release that fixes many outstanding bugs.
    In addition, it is now integrated with the Zope2 transaction
    system.

  2.0.0

    This is the first version of the database adapter using DCOracle
    for Zope.  This database adapter is based on an earlier database
    adapter for Principia, which is why this is revision 2.



chas wrote:
> 
> I've got 8000 photos (jpeg format) stored in an Oracle
> database. The table that contains the photos has these
> columns which are of interest :
> 
>  PICTURE                                  LONG RAW
>  PICTURE_LENGTH                  NOT NULL NUMBER(14)
> 
> My goals in order of progression are :
> 
> 1. Extract the image from the database using ZSQL methods
> 
> 2. Serve that image up directly to the web browser
> 
> 3. Save the image to the filesystem or, even better,
>    create a Zope Image Object
> 
> Unfortunately, I'm stuck at step 1. Doing a request on
> the database with ZSQL methods is returning :
> 
> Error, oci.error: (911, 'ORA-00911: invalid character\012')
> 
> Is there any way for Zope to handle this or is this going
> to involve python-DCOracle scripts instead and then uploading
> into Zope ?
> 
> Thank you very much in advance,
> 
> chas
> 
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-- 
Chris McDonough
Digital Creations, Inc.
Zope - http://www.zope.org