How can detect PDF version by js or IAC?

[daitranthanhoa]

PDF file has version 1.5,1.6,1.7

I had try get in Info object , but it not exist:

console.println( this.info.toSource());

How can detect PDF version by js or IAC?

Thank you.

[Thom Parker · Accepted solution]

The PDF version is not in the "info" object or the PDF metadata.  I don't think it's accessible from the IAC either.

The only place you can find the PDF version is in the first 9 bytes of the PDF file.  Fortunately there is an undocumented JS method that provides access to the binary file data.

var stmDoc = Collab.documentToStream(this);

var pdfVer = util.stringFromStream(stmDoc).substr(5,3);

[daitranthanhoa]

Thank you.

[lrosenth]

While A version of the PDF is present where Thom says it is – that can be overridden by data later in the PDF (/Catalog/Version).

[Thom Parker]

Forgot about that one   Tricky stuff, digging into the catalog is much harder.