pdfbox | ️ Create , Maniuplate and Extract Data | Document Editor library
kandi X-RAY | pdfbox Summary
kandi X-RAY | pdfbox Summary
I came across this thread (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.
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Top functions reviewed by kandi - BETA
- Extract attachments from a PDF file
- Get the embedded file
- Extracts the embedded file
- Extract files from the given map
- Extract URIs from a PDF file
- Get the PDA action URI for the given annotation
- Populates the page with ret_url and text
- Extract text from a PDF file
- Populates the page with ret_text and text
- Returns the number of images in a PDF file
- Get the number of documents image
- Extracts uridf from a PDF file
- This method returns information about a PDF file
pdfbox Key Features
pdfbox Examples and Code Snippets
Community Discussions
Trending Discussions on pdfbox
QUESTION
I have the following ASN1 ASN.1 dump
...ANSWER
Answered 2021-May-27 at 07:03The document hash is not calculated from the original PDF you want to sign. That PDF first is prepared for signing by applying certain changes, and then the hash is calculated from this prepared PDF except a placeholder gap in it prepared to later house the signature container.
In DetailTo create an integrated PDF signature, certain changes have to be applied to the PDF:
- The holder of the to-be-integrated signature is an AcroForm form field in the PDF. If the PDF does not contain an empty, unused signature field (or no existing field shall be used), a new signature field has to be added to the PDF.
- A signature form field may have a visualization, a widget annotation, which represents the signature on some page of the document itself. If such a visualization is desired, a matching annotation has to be added to the PDF.
- Information describing the mode and other details of signing have to be added to the PDF. Thus, the value of the chosen signature field has to be set to a new dictionary object in the PDF with these signature details; there are two special entries here, the ByteRange and the Contents. Both are set to blank values of appropriate size for starters.
- A marker is added to the PDF root AcroForm object indicating that the PDF is signed.
With these additions the PDF is stored. Thereafter the position of the Contents value in the file is fixed and the blank value of the ByteRange value is patched to an array of four integers, the start offset and size of the file segment before the Contents value and the start offset and size of the file segment thereafter.
Then the bytes of these segments of the file are hashed and a CMS signature container signing this document hash is generated which in turn is injected into the Contents value.
In your case the hash you find in the to-be-signed attributes,
QUESTION
After updating to Android 11 I get an "operation not permitted" error when PdfBox-Android saves a new file:
java.io.FileNotFoundException: /storage/emulated/0/my_folder/file_name.pdf: open failed: EPERM (Operation not permitted)
The App requests storage permission to the user and if I check Android permission manager the App is allowed management of all files. I try to save the pdf to the external storage in a folder created by the App itself with the following code.
...ANSWER
Answered 2021-Jun-03 at 09:51The problem was not due to the library but to the fact that in one of the languages supported by the App a part of the file name generated automatically contained a character not allowed.
QUESTION
I recently used pdfbox android library because iText is under AGPL. I tried running following code.
...ANSWER
Answered 2021-May-27 at 08:02As discussed in the comments, the image had a .jpg extension in the name, but was a PNG image file. The PDImageXObject createFromFile(String imagePath, PDDocument doc) method assumes the file type by its extension, so it embedded the file 1:1 in the PDF and assigned a DCT filter. Both of these would have been correct for a jpeg file, but not for png.
So the solution would be to either rename the file, or use the createFromFileByContent method.
QUESTION
I wanted to make a simple program to get text content from a pdf file through Java. Here is the code:
...ANSWER
Answered 2021-May-20 at 05:05As per the 3.0 migration guide the PDDocument.load method has been replaced with the Loader method:
For loading a PDF PDDocument.load has been replaced with the Loader methods. The same is true for loading a FDF document.
When saving a PDF this will now be done in compressed mode per default. To override that use PDDocument.save with CompressParameters.NO_COMPRESSION.
PDFBox now loads a PDF Document incrementally reducing the initial memory footprint. This will also reduce the memory needed to consume a PDF if only certain parts of the PDF are accessed. Note that, due to the nature of PDF, uses such as iterating over all pages, accessing annotations, signing a PDF etc. might still load all parts of the PDF overtime leading to a similar memory consumption as with PDFBox 2.0.
The input file must not be used as output for saving operations. It will corrupt the file and throw an exception as parts of the file are read the first time when saving it.
So you can either swap to an earlier 2.x version of PDFBox, or you need to use the new Loader method. I believe this should work:
QUESTION
I am trying to fill in a pdf form created with adobe acrobat, the form contains one text field named 'txt_name'. To fill in the form I am using Apache PDFBox.
Code to fill pdf form
...ANSWER
Answered 2021-May-19 at 09:34Deleting the mstmc.ttf file worked for me, the file is not a font. PDFboc is trying to read this file but since it is not a font it is not able to read the file, this si what causes the error.
Thanks to @mkl and @Tilman hausherr who helped me out.
QUESTION
I'm trying to use the PDF document parser called Textricator. It can use 3 different methods for parsing a PDF with some common OCR libraries. (itext5, itext7, pdfbox) The available methods are: text, table and form. Text for normal raw OCR recognition, table to read out structured table data, and form for parsing less structured forms, using a Finite State Machine (FSM).
However, I am not able to use the form parser. Perhaps I simply don't understand how to organize the many configuration states. The documentation is lacking a simple form example, and someone recently posted an attempt to read a very basic table using the form method, but was not able to. I also gave it a shot, but without any success.
Q: Can someone help me configure the state machine in the YML file?
(This is used to parse the demo file from one of that repo's issues, and shown in the copied screenshot below.)
The YML configuration file.
...ANSWER
Answered 2021-May-17 at 18:42As Textricator is kind of a hidden gem for pdf parsing imo, I'm happy to see someone using it and posted a config working with the sample document to the github issue:
QUESTION
I'm trying to save the edited PDF which I fetched from the remote server back to its location without having it downloaded/stored on the local machine. I'm using JSch SFTP method to get the input PDF file from the SFTP server using
...ANSWER
Answered 2021-May-06 at 16:23QUESTION
The error that I am getting is
...ANSWER
Answered 2021-May-07 at 15:20In this particular case, the issue was that Alpine Linux (inside the container) didn't have fonts that I required (Helvetica and ZapfDingbats).
Inside my docker file I had to add
QUESTION
I am creating a PADES signature using pdfbox 3.0.0 RC, my code works using the example to create the digital signature. However, I am unable to see the signature level in Adobe Acrobat when I open the document with this tool although it is able to validate my signature.
I am not creating the VRI so I am guessing that this might be an issue but then if this is necessary to validate my signature I don't understand why the signature is displayed as valid?
Adobe Acrobat Signature:
...ANSWER
Answered 2021-May-05 at 13:17While analyzing the file document-with signingTime.pdf you provided in a comment, I recognized an issue in it. Being aware of that issue I re-checked your original document-17 21.08.14.pdf and also recognized that issue therein, so maybe this issue causes the validation problem you're here to solve. Thus, ...
Both your example files (document-17 21.08.14.pdf and document-with signingTime.pdf) contain each actually two concatenated copies of the same, multi-revision PDF with a single signature Signature1, merely the second copy has a changed ID entry. Added to them are incremental updates with a signature Signature2.
QUESTION
ANSWER
Answered 2021-Apr-27 at 10:45Update: My issue when i use pdf-example version 2.0.21 Then i update version pdf-example to 2.0.23 then my issue is resolve
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install pdfbox
You can use pdfbox like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the pdfbox component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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