pdfbox
Create, Maniuplate and Extract Data from PDF Files (R Apache PDFBox wrapper)
Description
I came across this thread (https://twitter.com/derekwillis/status/922138080043241473) and it looks like some misguided folks are going to help promote the use of PDF documents as a legit way to dissemiante data, which means that we’re likely to see more evil orgs and Government agencies try to use PDFs to hide data.
PDFs are barely useful as publication holders these days let alone data sources.
Apache PDFBox is a project that provides a comprehensive suite of tools to do things with and to PDF documents.
The aim here is to fill in any gaps in
pdftools since poppler may
not try to accommodate all the stupidity that we’re now likley to see.
What’s Inside The Tin
- The ability to extract URI annotations
The following functions are implemented:
extract_uris: Extract URI annotations from a PDF documentextract_text: Extract text from a PDF documentpdf_info: Retrieve PDF Metadata
Installation
devtools::install_github("hrbrmstr/pdfboxjars")
devtools::install_github("hrbrmstr/pdfbox")Usage
library(pdfbox)
# current verison
packageVersion("pdfbox")
## [1] '0.3.0'PDF Info
pdf_info(
system.file(
"extdata", "imperfect-forward-secrecy-ccs15.pdf", package="pdfbox"
)
) -> info
dplyr::glimpse(info)
## Observations: 1
## Variables: 7
## $ title <chr> "Imperfect Forward Secrecy: How Diffie-Hellman Fails in Practice"
## $ subject <chr> ""
## $ author <chr> ""
## $ creation_date <chr> "2015-08-21T11:06:23-04:00[GMT-04:00]"
## $ modification_date <chr> "2015-08-21T11:08:05-04:00[GMT-04:00]"
## $ producer <chr> "pdfTeX-1.40.14"
## $ keywords <chr> ""Extract URI Annotations
extract_uris(
system.file("extdata","imperfect-forward-secrecy-ccs15.pdf", package="pdfbox")
)
## # A tibble: 33 x 3
## page uri text
## <int> <chr> <chr>
## 1 1 https://weakdh.org WeakDH.org.
## 2 6 www.fbi.gov www.fbi.gov.
## 3 12 http://cr.yp.to/factorization/smoothparts-20040510.pdf http://cr.yp.to/factorization/smoothpar…
## 4 12 http://caramel.loria.fr/p180.txt http://caramel.loria.fr/p180.txt.
## 5 12 http://www.hyperelliptic.org/tanja/SHARCS/talks06/thorsten.pdf http://www.hyperelliptic.org/tanja/
## 6 12 http://www.hyperelliptic.org/tanja/SHARCS/talks06/thorsten.pdf SHARCS/talks06/thorsten.pdf.
## 7 13 https://www.olcf.ornl.gov/titan https://www.olcf.ornl.gov/titan.
## 8 13 http://www.spiegel.de/international/germany/inside-the-nsa-s-war-on-i… http://www.spiegel.de/international/ger…
## 9 13 http://www.spiegel.de/international/germany/inside-the-nsa-s-war-on-i… inside-the-nsa-s-war-on-internet-securi…
## 10 13 http://www.sagemath.org http://www.sagemath.org.
## # … with 23 more rowsExtract text
extract_text(
system.file(
"extdata", "imperfect-forward-secrecy-ccs15.pdf", package="pdfbox"
)
) -> pg_df
dplyr::glimpse(pg_df)
## Observations: 13
## Variables: 2
## $ page <int> 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13
## $ text <chr> "Imperfect Forward Secrecy:\nHow Diffie-Hellman Fails in Practice\nDavid Adrian¶ Karthikeyan Bhargavan∗ …pdfbox Metrics
| Lang | # Files | (%) | LoC | (%) | Blank lines | (%) | # Lines | (%) |
|---|---|---|---|---|---|---|---|---|
| Java | 3 | 0.18 | 352 | 0.57 | 89 | 0.51 | 23 | 0.15 |
| R | 10 | 0.59 | 132 | 0.21 | 47 | 0.27 | 77 | 0.50 |
| XML | 1 | 0.06 | 69 | 0.11 | 0 | 0.00 | 0 | 0.00 |
| Rmd | 1 | 0.06 | 27 | 0.04 | 31 | 0.18 | 52 | 0.34 |
| Maven | 1 | 0.06 | 27 | 0.04 | 3 | 0.02 | 1 | 0.01 |
| make | 1 | 0.06 | 10 | 0.02 | 5 | 0.03 | 1 | 0.01 |
Code of Conduct
Please note that this project is released with a Contributor Code of Conduct. By participating in this project you agree to abide by its terms.