Converting an image to jpg on server

dev
1

I reviewed Trouble converting png to jpg
But It seems to be occurring still or again.The below works, but if the file being written is a jpg, then it writes, but as a 0kb file. The image does not upload.
I can change my cfdocuments to use png, but was hoping to not have to do that .
Also, tried using convert and will create teh jpg, but still as 0kb.
Windows server 2016 Lucee 5.3.5.92

<cffunction name="submitSignature" access="remote" returntype="boolean">
        <cfargument name="signature" type="string" required="yes">
        <cfargument name="planned_shipment_skey" type="string" required="yes">
        <cfset image = imageReadBase64(arguments.signature)>
        <cfset destination = expandPath('../../../Attachments/signatures/') > 
       
    <!---    <cfimage
            action="convert"
            destination="#destination##planned_shipment_skey#.jpg"
            source="#image#"
            overwrite="yes"
            quality="0"
            >--->
        <cfimage
            action="write"
            destination="#destination##planned_shipment_skey#.png"
            source="#image#"
            overwrite="yes"
            quality="0"
            >

        <cfreturn true />

    </cffunction>
2

are you running the latest version of the image extension?

3

@Zackster, just updated but Windows Server 2016 Lucee 5.3.5.92
Image Extension is 1.0.0.35
If I go to the file server and look at the image if it is a gif or jpg, it shows as 0KB file with nothing displaying.
If I use png the file displays properly. This is a signature that displays on a document.Using canvas to capture the signature.

4

what does <cfdump var=#imageInfo(image)#> show?

5

image
image336×844 13.4 KB

1 Like
6

can you file a bug in jira and attach the image?

7

Done
https://luceeserver.atlassian.net/browse/LDEV-2869

1 Like
8

Can you also attach the problematic src image file?

9

added both to JIRA, but here is the png. would not take the jpg, as it is blank

25575300182
255753001821200×200 2.47 KB

10

thanks for the sample, I had a play and got some stack traces which I attached to the bug.

You’re also using Java 11 OpenJdk?

11

11.0.3 (AdoptOpenJDK) 64bit

Apache Tomcat/9.0.34

12

Does anyone have a workaround in the meantime?
PNG’s while they do create, come out extremely light and have tried many variations. This will be a huge hold up in moving to lucee.

13

We actually figured out a work around for us.
Looping through and making sure the color was set to actual black and then saving as a jpg on client side instead of server side. Then when you upload to server in Lucee it does write as a jpg

for (i=3;i<iData.data.length;i+=4){
		//if the opacity is 0 change the color to white:
		if (iData.data[i] == 0) {
			iData.data[i-1]=255;
			iData.data[i-2]=255;
			iData.data[i-3]=255;
		}
		//Change opacity to 100% for everything:
		iData.data[i]=255;
	}
	this.canvas.hide();
	this.context.putImageData(iData,0,0);

	var dataString = this.canvas.get(0).toDataURL("image/jpeg");
	var index = dataString.indexOf( "," )+1;
	dataString = dataString.substring( index );