Handle escape characters in ModDate #1118
Description
We are using pdfcpu to handles eInvoicing with Factur-X. The Factur-X format add an XML as an attachments to the PDF invoice to allow easy processing.
We encounter an issue with some samples PDF provided by Factur-X https://fnfe-mpe.org/factur-x/
The ModDate is invalid:
$ pdfcpu attachments list Facture_F20220023-LE_FOURNISSEUR-POUR-LE_CLIENT_MINIMUM.pdf
validating URIs..
pdfcpu: invalid date ModDate
This is because the ModDate contains escaped characters for example:
D\07220200707112545\05300\04700\047
It can be solved by adding an Unqote call on the DateTime function:
// DateTime decodes s into a time.Time.
func DateTime(s string, relaxed bool) (time.Time, bool) {
// 7.9.4 Dates
// (D:YYYYMMDDHHmmSSOHH'mm)
var d time.Time
// Add an unquote
var err error
s, err = strconv.Unquote(fmt.Sprintf("\"%s\"", s))
if err != nil {
return d, false
}
var ok bool
s, ok = prevalidateDate(s, relaxed)
if !ok {
return d, false
}
...
You can find a PDF file with this issue and the full verbose report
verbose.txt
Facture_F20220023-LE_FOURNISSEUR-POUR-LE_CLIENT_MINIMUM.pdf
If you are ok with this I can submit a PR