How to Download Pdf From Server, Show Progress, Store into Internal Storage Show into Pdf Viewer - pdf

I want to make an app with a lot of PDFs. Where one can read the PDFs online and also offline. Clicking offline read will download the first time but clicking next will open the PDF without downloading again. So how to write the code? It would be helpful if someone provided the source code of such an app.
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How to edit and save a PDF in Firefox 107 with JavaScript?

With the latest version of Firefox (107) it is now possible to edit and sign PDF documents within the browser preview window.
But how can I upload an updated version of such a PDF file back into my Web Application?
Is there any kind of JavaScript API I can use?
There is much overlap between PDF web editing browsers and Browser editing PDFs
the data is pulled down locally and the binary application edits the data however for a PDF, that then requires a local save as a new combined PDF. here we can see a visual reminder.
In Firefox or Chrome there are slight differences but the core need is to resave the PDF as a clients local file.
Chrome has inking
And Firefox uses a slightly different overlay but again the conjoined local data must be first saved as a new PDF.
either by print
or the top right Save (again) AS
Thus to achieve your goal you need to ask the annotator user to upload their masterpiece. However you cannot easily do that in the sandboxed page (with work frame) it needs to be after a user signal such as press button here to upload where-ever IF you were able or bothered to save as a new pdf.

Fetch a certain page of a pdf as an image from google drive

I have some 10,000 pages of hand-written scanned documents in google drive in somewhere around 70 pdf documents.
I am making a spreadsheet index of these, with one row for each page where I make notes of what is on each page, by actually viewing those pages, reading it, and every fully typing it if required.
I need a link, which I can put in the spreadsheet, which when clicked opens up a certain page of the pdf as an image only, and not the entire pdf, the pdf is in google drive. Is there something like this possible in Google Drive? Or should I manually download all pdf, split it into images, and then re-upload and use that?
(example - java -jar pdfbox-app.jar PDFToImage -format jpg -quality 0.75 pdffile.pdf ; and then upload all this)
I have a feeling it must be possible because when we open the pdf in browser, it loads pdf pages one by one, it takes time but it opens it in some custom image+text format, so it must be exported. Also I know there is one image version for each google slide and link is stable, so there might be something for pdf also I was thinking.
There isn’t a parameter or feature to link a pdf page in Google Drive file viewer.
Indeed as mentioned, you can link to a specific slide in Google Slides, however Google file types do have additional features.
That’s not the case for PDFs for example. A workaround I can think of would be to create a comment for each page and each comment will have its own id.
After creating the comment, you can click on the three vertical dots icon and click on Link to this comment.
Alternatively, you can send feedback to Google (On file viewer page, click on three vertical dots icon and then Send feedback to Google) making sure to describe the proposed feature.

Fillable PDF form with button to upload completed PDF to web server

I'm trying to find a way to host some fillable PDF forms on our website that people can download, fill out, and then they have a SUBMIT button on it that would 1) upload the completed form to a folder on our web server as a PDF file, and then ideally 2) email a direct link to the file on the server. I know how to add the button, just not clear on the actions side for this scenario.
Adobe docs have some info here, https://helpx.adobe.com/acrobat/using/publishing-interactive-pdf-web-forms.html, but nothing specific to what I need.
Does anyone have any experience with this? And if it's even a realistic goal given the number of different PDF readers, browser-based viewers, etc and how it would be supported by all?
Thanks in advance

How can I scrape PDF created using PDF.js using selenium?

I have successfully managed to download the PDF file from a site that uses PDF.js to create and show PDFs (using selenium)
The downloaded PDF file does not open on my desktop (mac & linux).
It seems like the PDF is encoded, or encrypted.
On closer inspection, right after the PDF is downloaded, the network tab also shows pdf.js.worker. It seems like pdf.js.worker is decoding this file to show on the site.
How can I replicate, or follow the same flow of pdf.js.worker and decode this PDF?
Update
I have tried looking at the pdf.js.worker code to follow the code execution, but it seems like a really hard task, hoping there is a simpler way.

Viewing pdf large files online as thumbnail

I need to upload a pdf file in my website so that users can view/download it. But it is of 30MB file. So when the user clicks on that downloadable link it takes much time to download. So I was just thinking is there any other solution for this so that users can atleast view and read the contents of the file without downloading it and if required they can download it. ??
one suggestion is like onclick of downloadable link one new link will open where user can view pages individual as thumbnail and on click it will zoom and below we will give download link(as in google ebooks). But I was just wondering how this can be done?? Is it possible using jquery/ajax?? Please give your thoughts on this and any inputs will be highly appreciated.
You should be able to upload your PDF at http://view.samurajdata.se and then include the viewer for your PDF in an iframe.
If you like, you can even take the viewer link (something like http://view.samurajdata.se/psview.php?id=YOUR_PDF_ID), and get URLs for the individual pages as GIFs like http://view.samurajdata.se/rsc/YOUR_PDF_ID/tmp1.gif for page 1, tmp2.gif for page 2, etc. Then you can embed those GIFs how you want and customize the look and feel of your viewer.