Coldfusion cfimage barcode generator (generating multiple barcodes)

Question

This script works fine. The issue I'm having is trying to get it to generate multiple barcodes per page. It will only generate the first one. the rest are blank images.

<cfoutput>
<cfset x = 0>
<cfloop index="price_tag" from="1" to="#arrayLen( session.tags )#">
 <cfset x = x + 1>
<cfscript>
code128= createobject("java","com.lowagie.text.pdf.Barcode128");
code128.setCodeType(code128.CODE128);
/* Set the code to generate */
code128.setCode("#Session.tags[price_tag].itemnum#");
color =  createobject("java","java.awt.Color");
image = code128.createAwtImage(color.black, color.white);
bufferedImage = createObject("java", "java.awt.image.BufferedImage");
bufferedImageType = bufferedImage.TYPE_BYTE_GRAY;
bufferedImage = bufferedImage.init(image.getWidth(JavaCast("null", "")),image.getHeight(JavaCast("null", "")), bufferedImageType);
graphics2D = bufferedImage.createGraphics();
graphics2D.drawImage(image,0,0,JavaCast("null", ""));
barcodeImage = imageNew(bufferedImage);
</cfscript>   


         <div style="margin:0px; padding:0px;">
            <div style="font-size:42px; font-weight:bold; margin-bottom:0px; margin-right: 10px; margin-top: -5px;">#Session.tags[price_tag].item_name#</div>
            <div style="font-size:32px; margin-bottom:0px; margin-top:-7px; margin-right: 10px;">#Session.tags[price_tag].item_brand#</div>
           <div style="font-size:24px; margin-bottom:0px; margin-top:-7px;">#Session.tags[price_tag].item_unit_size# #Session.tags[price_tag].item_unit_type# </div>
            <div style="font-size:120px; font-weight:bolder; margin-top:-55px; margin-right: 10px;" align="right">#DollarFormat(Session.tags[price_tag].item_retail)#</div>
            <div style="font-size:30px; font-weight:bolder; margin-top:-30px; margin-right: 10px;" align="right"> #Session.tags[price_tag].item_sold_by#</div>
            <div style="font-size:30px; margin-top:-35px; margin-left 10px;" align="left">#Session.tags[price_tag].itemnum#</div>
            <div style=" position:absolute; margin-left: 10px; margin-top: 100px;"><cfimage action="writeToBrowser" source="#barcodeImage#" format="png" quality="1" width="180px" overwrite = "yes"></div>
         </div>   
   <cfif #arrayLen( session.tags )# / #x# NEQ 1>                            
   <cfdocumentitem type="pagebreak"/> 
   </cfif>
</cfloop>
</cfoutput>

Answer 1

It's probably because you are using action="writeToBrowser" in a loop within cfdocument. It's not going to a browser.

Try writing real files, then linking to them. I've done that and know it works. Make sure you use a distinct file name in that loop.

If you plan to run this routine over and over, it's safe to use the same file names. But in your code disable caching of the image src with a url var:

<cfoutput>
<img src="/media/cms/code-#price_tag#.png?rand=#randRange(0,1000)#" width="180"/>
</cfoutput>