PDFReader | PDF reader extension for falkon | Document Editor library

 by   Tarptaeya JavaScript Version: Current License: GPL-3.0

kandi X-RAY | PDFReader Summary

kandi X-RAY | PDFReader Summary

PDFReader is a JavaScript library typically used in Editor, Document Editor applications. PDFReader has no vulnerabilities, it has a Strong Copyleft License and it has low support. However PDFReader has 1 bugs. You can download it from GitHub.

PDF reader extension for Falkon using pdf.js.
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            kandi-support Support

              PDFReader has a low active ecosystem.
              It has 8 star(s) with 3 fork(s). There are 4 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              There are 1 open issues and 2 have been closed. On average issues are closed in 32 days. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of PDFReader is current.

            kandi-Quality Quality

              PDFReader has 1 bugs (0 blocker, 0 critical, 1 major, 0 minor) and 0 code smells.

            kandi-Security Security

              PDFReader has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              PDFReader code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              PDFReader is licensed under the GPL-3.0 License. This license is Strong Copyleft.
              Strong Copyleft licenses enforce sharing, and you can use them when creating open source projects.

            kandi-Reuse Reuse

              PDFReader releases are not available. You will need to build from source code and install.
              Installation instructions are not available. Examples and code snippets are available.
              It has 3765 lines of code, 0 functions and 5 files.
              It has low code complexity. Code complexity directly impacts maintainability of the code.

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            PDFReader Key Features

            No Key Features are available at this moment for PDFReader.

            PDFReader Examples and Code Snippets

            No Code Snippets are available at this moment for PDFReader.

            Community Discussions

            QUESTION

            itext7 CopyPagesTo not opening PDF
            Asked 2022-Apr-04 at 15:02

            I am trying to add a Cover Page PDF file to another PDF file. I am using CopyPagesTo method. CoverPageFilePath will go before any pages in the pdfDocumentFile. I then need to rewrite that new file to the same location. When I run the code and open the new pdf file I get an error about it being damaged.

            ...

            ANSWER

            Answered 2022-Apr-04 at 15:02

            Whenever you have some other type, like a StreamWriter, or here a PdfWriter writing to a Stream, it may not write all the data to the Stream immediately.

            Here you Close the pdfDocument for all the data to be written to the MemoryStream.

            ie this

            Source https://stackoverflow.com/questions/71739076

            QUESTION

            PDFsharp/MigraDoc Add background images to pages
            Asked 2022-Mar-11 at 18:14

            GOAL

            To open an existing PDF file with multiple pages and add background image to all pages. (Optionally the background image of the first page differs from the others)

            In my current implementation (I use .NET 6 and PDFsharp btw.) I add the image to each page, which increases the size of the file dependent on the number of pages.

            QUESTION

            Is there a way in PDFsharp/MigraDoc to embed a background image only once into the document and then reference it for each page?

            CODE

            Both PDF document and the image come from a database as byte arrays.

            ...

            ANSWER

            Answered 2022-Mar-11 at 16:27

            With PDFsharp and MigraDoc this optimization is done automatically if you use them as intended.

            Load the image once with PDFsharp and add it to as many pages as you like, there will be only one copy of the image in the document.

            Source https://stackoverflow.com/questions/71440686

            QUESTION

            ExceptionConverter: java.io.IOException: Stream Closed when trying to create a PDF using iText
            Asked 2022-Feb-17 at 14:29

            I'm working on PDF related project and I want to create a PDF from the existing PDF.

            all things are done but when I created a final PDF at that time this exception was thrown at the line of document.close(); at the method of savePDF which describe below.

            • Create new PDF from existing PDF adding PdfImportedPage.

            here is my code

            The app crashes only when we add a new page

            ...

            ANSWER

            Answered 2022-Feb-17 at 13:46

            In createAndAddPage you import the page into the wrong PdfWriter:

            Source https://stackoverflow.com/questions/71157587

            QUESTION

            Pdf signature invalidates existing signature in Acrobat Reader
            Asked 2022-Jan-28 at 18:26

            I'm using iText 7.1.15 and SignDeferred to apply signatures to pdf documents. SignDeferred is required since the signature is created PKCS11 hardware token (usb key).

            When i sign a "regular" pdf, e.g. created via word, i can apply multiple signatures and all signatures are shown as valid in the adobe acrobat reader.

            If the pdf was created by combining multiple pdf documents with adobe DC, the first signature is valid but becomes invalid as soon as the seconds signature is applied.

            Document in Adobe reader after the first signature is applied:

            Document in Adobe reader after the second signature is applied:

            The signatures of the same document are shown as valid in foxit reader.

            I've found a similar issue on stackoverflow (multiple signatures invalidate first signature in iTextSharp pdf signing), but it was using iText 5 and i'm not sure it is the same problem.

            Question: What can i do in order to keep both signatures valid in the Acrobat Reader?

            Unsigned Pdf document on which the first signature becomes invalid: https://github.com/suntsu42/iTextDemoInvalidSecondSignature/blob/master/test.pdf

            Twice signed document which is invalid: https://github.com/suntsu42/iTextDemoInvalidSecondSignature/blob/master/InvalidDocumentSignedTwice.pdf

            Code used for signing

            ...

            ANSWER

            Answered 2022-Jan-28 at 16:35

            As already mentioned in a comment, the example document "InvalidDocumentSignedTwice.pdf" has the signature not applied in an incremental update, so here it is obvious that former signatures will break. But this is not the issue of the OP's example project. Thus, the issue is processed with an eye on the actual outputs of the example project.

            Analyzing the Issue

            When validating signed PDFs Adobe Acrobat executes two types of checks:

            • It checks the signature itself and whether the revision of the PDF it covers is untouched.
            • (If there are additions to the PDF after the revision covered by the signature:) It checks whether changes applied in incremental updates only consist of allowed changes.

            The former check is pretty stable and standard but the second one is very whimsical and prone to incorrect negative validation results. Like in your case...

            In case of your example document one can simply determine that the first check must positively validate the first signature: The file with only one (valid!) signature constitutes a byte-wise starting piece of the file with two signatures, so nothing can have been broken here.

            Thus, the second type of check, the fickle type, must go wrong in the case at hand.

            To find out what change one has to analyze the changes done during signing. A helpful fact is that doing the same using iText 5 does not produce the issue; thus, the change that triggered the check must be in what iText 7 does differently than iText 5 here. And the main difference in this context is that iText 7 has a more thorough tagging support than iText 5 and, therefore, also adds a reference to the new signature field to the document structure tree.

            This by itself does not yet trigger the whimsical check, though, it only does so here because one outline element refers to the parent structure tree element of the change as its structure element (SE). Apparently Adobe Acrobat considers the change in the associated structure element as a change of the outline link and, therefore, as a (disallowed) change of the behavior of the document revision signed by the first signature.

            So is this an iText error (adding entries to the structure tree) or an Adobe Acrobat error (complaining about the additions)? Well, in a tagged PDF (and your PDF has the corresponding Marked entry set to true) the content including annotations and form fields is expected to be tagged. Thus, addition of structure tree entries for the newly added signature field and its appearance not only should be allowed but actually recommended or even required! So this appears to be an error of Adobe Acrobat.

            A Work-Around

            Knowing that this appears to be an Adobe Acrobat bug is all well and good, but at the end of the day one might need a way now to sign such documents multiple times without current Adobe Acrobat calling that invalid.

            It is possible to make iText believe there is no structure tree and no need to update a structure tree. This can be done by making the initialization of the document tag structure fail. For this we override the PdfDocument method TryInitTagStructure. As the iText PdfSigner creates its document object internally, we do this in an override of the PdfSigner method InitDocument.

            I.e. instead of PdfSigner we use the class MySigner defined like this:

            Source https://stackoverflow.com/questions/70889989

            QUESTION

            java itext7 watermark text is hiding behind images
            Asked 2022-Jan-27 at 15:23

            I try to add a watermark using itext in pdf. it work without problem using this code :

            ...

            ANSWER

            Answered 2022-Jan-27 at 15:23

            You use page.newContentStreamBefore() to add a content stream for your water mark. Thus, when the page is drawn, the watermark is drawn first and the content thereafter over it. For usual text and sparse vector graphics that is good but for full area covering content the watermark may be totally hidden.

            Try to use page.newContentStreamAfter() instead. But beware, you may not want to bold the watermark text then anymore, probably even restrict to outline only, as the mark now covers content.

            In a question update and a comment you asked how to

            make the text transparent.

            Transparency usually is achieved by selecting a matching extended graphics state, e.g.:

            Source https://stackoverflow.com/questions/70554618

            QUESTION

            Python code to extract txt from PDF document
            Asked 2022-Jan-14 at 22:44

            I have been trying to convert some PDFs into .txt, but most sample codes I found online have the same issue: They only convert one page at a time. I am kinda new to python, and I am not finding how to write a substitute for the .GetPage() method to convert the entire document at once. All help is welcomed.

            ...

            ANSWER

            Answered 2022-Jan-14 at 22:44

            You could do this with a for loop. Extract the text from the pages in the loop and append them to a list.

            Source https://stackoverflow.com/questions/70717159

            QUESTION

            How to turn the page using Itextsharp
            Asked 2021-Dec-03 at 02:18

            Ifound some example. However, all of the examples use PdfReader. I want to use PDFWriter.

            Below is the code I wrote.

            ...

            ANSWER

            Answered 2021-Dec-02 at 00:31

            QUESTION

            Writing a Python pdfrw PdfReader object to an array of bytes / filestream
            Asked 2021-Nov-22 at 14:07

            I'm currently working on a simple proof of concept for a pdf-editor application. The example is supposed to be a simplified python script showcasing how we could use the pdfrw library to edit PDF files with forms in them.

            So, here's the issue. I'm not interested in writing the edited PDF to a file. The idea is that file opening and closing is going to most likely be handled by external code and so I want all the edits in my files to be done in memory. I don't want to write the edited filestream to a local file.

            Let me specify what I mean by this. I currently have a piece of code like this:

            ...

            ANSWER

            Answered 2021-Nov-22 at 14:07

            To save your altered PDF to memory in an object that can be passed around (instead of writing to a file), simply create an empty instance of io.BytesIO:

            Source https://stackoverflow.com/questions/68985391

            QUESTION

            Get PDF XMP Metadata without loading the complete document
            Asked 2021-Nov-09 at 10:07

            With libraries like iTextSharp or iText you can extract metadata from PDF documents via a PdfReader:

            ...

            ANSWER

            Answered 2021-Nov-09 at 10:07

            With PDF4NET you can extract the XMP metadata without loading the entire document in memory:

            Source https://stackoverflow.com/questions/69886240

            QUESTION

            How to download edited PDF using ITextSharp and C# Blazor
            Asked 2021-Nov-06 at 16:07

            I have a Blazor application in which I'm trying to download a PDF I have edited using ITextSharp. All resources I search tend to use the Response class which I don't have (I believe because I am using .NET 6). I found some solutions that that send the byte array to a javascript function but I'm having no such luck. I get the error

            System.ArgumentNullException: 'Value cannot be null.' When I Envoke the JS function.

            I've posted my code below. Though I'm not passing any null objects, I do see some potential errors in my memory stream and I'm not sure why (See Image). Any information on where I'm going wrong or any easy approach would be appreciated. Thanks.

            ...

            ANSWER

            Answered 2021-Sep-13 at 20:36

            For anyone who needs it, I solved this issue by creating a controller.

            Source https://stackoverflow.com/questions/69132556

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install PDFReader

            You can download it from GitHub.

            Support

            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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            CLONE
          • HTTPS

            https://github.com/Tarptaeya/PDFReader.git

          • CLI

            gh repo clone Tarptaeya/PDFReader

          • sshUrl

            git@github.com:Tarptaeya/PDFReader.git

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