BLOB Images in and out of Oracle

Question

Hi all, I'm using CF8 and storing images in Oracle as BLOB datatypes.  I am not able to use CF to write files to the file server.  I have about 50 large images already stored that need to have thumbnails made of them and stored in another field in each record.  So, I need to do this:
Pull the BLOB out of the database.
Make it a CF image.
Resize the image.
Make the new image a BLOB.
Put the new BLOB in the database.
The issue I'm having is that when an image starts out as a BLOB it doesn't seem to know the file type, so when I try to do step 5, above, I get "Verify your inputs. The source file should contain an extension,so that ColdFusion can determine the image format."  It seems that if I start with an actual file in step 1 it works, but not if it's binary to start.  This is my basic code edited for clarity.
<cfset thisImage = ImageNew(get.file_binary)>
<cfset ImageResize(thisImage, "500", "", "mediumQuality")>
<cfquery name="update" datasource="#dsn#">
        UPDATE images
        SET file_binary_thumbnail = #ImageGetBlob(thisImage)#
        WHERE image_id = #get.image_id#
</cfquery>
Any idea how to get this to work?  Thanks, everyone!

Answer 1

Glowball wrote:
 <cfset thisImage = ImageNew(get.file_binary)>
It could be that imageNew() expects an image as parameter, and not on a binary. What happens when you first convert from binary to image, like this?
<cfset imageAsBase64String   = binaryEncode(get.file_binary, "base64")>
<cfset thisImage                       = imageReadBase64(imageAsBase64String)>
<cfset ImageResize(thisImage, "500", "", "mediumQuality")>
etc.