How to calculate Image width and height?

[Rajesh M1]

Hello,

I have a requirement in which we have to validate image width and height of the image file attached to the catalog request.

There is similar functionality in Images(db_image) table OOB. if we upload any image it directly calculates image width and height but I am unable to trace the code which is performing this functionality.

Please suggest an approach or possible solution to perform this activity.

Note: Our instance is in Fuji

Best Regards,

Rajesh M.

[spartacus1]

Hello,

Anyone can help us on how to inject script to validate image before uploading.. I want to use it from this catalog item picture update portion..

Anybody can help?

Thank you

[michal29]

Hello Raj,

Use the script:

var result = {

  height: 0,

  width: 0,

  size: 0,

  file_name: ''

  };

function getProperties(sys_id){

  var ga_att = new GlideRecord ("sys_attachment");

  ga_att.addQuery('table_sys_id', sys_id);

  ga_att.query();

  while (ga_att.next()){

  result.height = ga_att.image_height;

  result.width = ga_att.image_width;

  result.size = ga_att.size_bytes;

  result.file_name = ga_att.file_name;

  }

}

getProperties('<sys_id_of_catalog_item>')

// like that: getProperties('6924a5e20409a9881bad70394a55cb63')

Then result object holds all the properties.

Note: the result of this query is not visible in the Table, without the roles sys_attachment

EDIT:

if you have more than one attachment, try this one:

var attachments = [];

function getProperties(sys_id){

  var ga_att = new GlideRecord ("sys_attachment");

  ga_att.addQuery('table_sys_id', sys_id);

  ga_att.query();

  while (ga_att.next()){

var result = {

  height: 0,

  width: 0,

  size: 0,

  file_name: ''

  };

  result.height = ga_att.image_height;

  result.width = ga_att.image_width;

  result.size = ga_att.size_bytes;

  result.file_name = ga_att.file_name;

              attachments.push(result)

  }

}

getProperties('<sys_id_of_catalog_item>')

attachements

// This will return an array of object that are attachment properties

Regards,

Michal

[danmorella]

Do you have to enable some feature on ServiceNow to populate the "image_height" and "image_width" values?   When I try to execute this script on the server for a GlideRecord object, it simply returns and empty string.   I also tried those properties on a GlideSysAttachment object, but they just came back as 0.

Thanks,

Dan Morella

[spartacus1]

Hi Michal,

Thanks for the script, but how we're going to use it? in client script? can guide us more. thanks a lot