unicli debug command prompt

[gunnsth]

Opens up a prompt for viewing and debugging PDFs. Once in prompt can execute various commands to debug.

$ unicli debug file.pdf
> version
1.7
> pages
10
> page 3
Page context set to page 3
> images
Page 3
1 images
Img1 XObject: 121 0 R
> wo 121 /tmp/img1.dat
Object 121 written to /tmp/img1.dat
> content
q
Img1 Do
Q
> quit
Closing debug prompt
$

Basic commands

version/v - Print PDF version
catalog/c - Displays the PDF catalog
obj/o num - Displays object number `num`   In a readable form.  If the object is binary then avoid writing to the console
writeobj/wo num path - Writes object num to path
pages/pp - number of pages

Page context

It is also possible to work in page context, i.e. set page context to a specific page.

page/p num - Sets page context to page `num`
resources/res (num) - Prints page resources for page num (parameter not needed if page context set)
fonts (num) - Overview of fonts
xobj (num) - Overview of XObjects
contents (num) - Print the contentstream
text - Outputs as text
images - Overview of images in the content

Other

Other things we would like to be able to see:

• filters: Get an overview of encodings/filters that are used in the PDF.