Shell script to determine file width, height, resolution cs5 js

Question

I’ve been using a Script by Michael L Hale (that utilizes »xmp.getProperty« and Bridge’s »core.quickMetadata«) to determine files’s dimension and resolution without having to open or place them.
Unfortunately it fails with some files (non-Photoshop generated bitmaps, it seems).
(Pdfs I treat differently altogether to avoid the trouble of determining pdf-page counts and potential problems with pdfs containing differently sized pages.)
Do any of you know if and how one can access files’ width, height, resolution with »app.system« in CS5?
I may have come across it before, but can’t locate such a thread currently.
Thanks for any input.

Answer 1

These are 2 options that you could use if you wanted to dump all the info to text file then parse in JS. You could see if either of these contain the data that you are after?
#target bridge
var foo = File('~/Desktop/SomeFile.tif');
getAllXMLSIPS(foo);
//getMetaDataMDLS(foo)
function getAllXMLSIPS(f) {
     if (f instanceof File && f.exists) {
          var shellString = "sips --getProperty allxml ";
          shellString += f.fsName;
          shellString += ' > ~/Documents/StdOut.txt';
          app.system(shellString);
function getMetaDataMDLS(f) {
     if (f instanceof File && f.exists) {
          var shellString = "/usr/bin/mdls ";
          shellString += f.fsName;
          shellString += ' > ~/Documents/StdOut.txt';
          app.system(shellString);