PDFTextStripper - parsing incorrectness
fungc opened this issue · comments
Hello,
I am using PDFTextStripper, from the PDFbox library, to parse the text out of the pdf generated from html using openhtmltopdf.
Code for parsing:
final PDDocument document = PDDocument.load(pdfBytes);
final PDFTextStripper pdfTextStripper = new PDFTextStripper();
return pdfTextStripper.getText(document);
However, I am seeing a few problems:
- Invisible, redundant text
sometimes the PDF will have invisible text in front of the actual text.
e.g.
HTML:
line1
line2
line3
PDF:
line1
line2 (<--- invisible)
line2
line3
This happens even when you just open the pdf and select / copy the text.
- commas are places in the wrong position, when parsed
commas show up correctly, but when parsed, they show in incorrect position
e.g.
HTML:
hello, my name, is
PDF:
,,hello my name is
NOTE this does not happen when you open the pdf and select / copy the text.
- Interestingly, the comma problem goes away when I parse like this
final PDDocument document = PDDocument.load(pdfBytes);
final PDFTextStripper pdfTextStripper = new PDFTextStripper();
pdfTextStripper.setSortByPosition(true);
return pdfTextStripper.getText(document);
However, all superscripts / subscripts then gets messed up on the output
e.g. receptiońs becomes receptións
Do you know why these happens?
Thank you!
Number 1 may be a serious bug in this library, so I'd love to get the html to reproduce it.
Number 2 and 3, I'm not sure. Does this happen with other PDFs or just ones produced by this library?
I can't get you the html at the moment, but here is an output pdf
I think (1) has to do with paging, it always happens at the end of a page or at the beginning.
(2) (3) does not happen with other PDFs; I was testing with Apache FOP.
do you have an email we can chat?
Financier-Extraordinaire-long.pdf
Found another bug. For extra long strings, the end of the string becomes invisible but copy-able
@fungc could you please provide html code for these issues?