I am working presently on the adf side and I am stuck with some issues.
I have a page where I have to display the pdf files. The pdf files are in another site and the links are present in a column of the database.But when I try to access those links they are downloading rather than displaying. I need to display those pdf files in my inline frame rather than downloading.
I heard many suggestions like write a bean and put the file in session and get display them in page .But I am not clear.
So please help me on this.
I have a check box at the end and the checkbox should be enabled in my page only when the displayed pdf scrolled to end.
Please help me solving those issues.
When you create a link to a PDF there is only so much you can do to make it display in the browser. The most important thing you must do on the server that delivers the PDF is to make sure it is presented with the correct MIME-type and without a content-disposition header value of attachment.
After that, it's up to the browser to either show it in a browser tab or to download the file. I know Chrome will show the PDF in the browser when it's linked to, not sure if it also does that when it's linked in an iframe.
I don't think there's a reliable way to make it work the way you want, simply because it's very browser dependent.
Related
I'm curious how to make an accessible button for screen readers which downloads PDF.
I know that there is an option using href and pass there an URL to the pdf file, and even a download attribute inside an anchor to open a download window.
But it's not a good way for a screen reader. The screen reader reads it as a link but actually, this is not a link because it triggers downloading a pdf file rather than redirect to another page. So this can be confusing for people with vision disorders who rely on their screen readers.
Is it a good accessibility way to create such a button? Or relying on <a href='path-to-pdf'>...</a> is completely enough and not confusing for people with disabilities ?
General answer and basics of file download
Both a link and a button are perfectly fine, it doesn't make much difference.
IN any case, it's very important to explicitly indicate that the link or button is going to download a file rather than open a page, to avoid surprise.
The simplest and most reliable is just to write it textually, i.e. "View the report (PDF)".
You may also put a PDF icon next to the link to indicate it, but make sure to use a real image, i.e. <img alt="PDF" /> and not CSS stuff, since the later may not be rendered to screen readers and/or don't give you the opportunity to set alt text (which is very important).
A good practice is also to indicate the file size if its size is big (more than a few megabytes), so that users having a slow or limited connection won't get stuck or burn their mobile data subscription needlessly.
It's also good to indicate the number of pages if it's more than just a few, so that people can have an idea on how big it is, and if they really can take the required time to read it.
Example: "View the report (PDF, 44 pages, 17 MB)"
Note that similarly, that's a good practice to indicate the duration of a podcast or video beforehand.
Additional considerations with PDF
First of all, you should make sure that your PDF is really accessible. Most aren't by default, sadly.
You should easily find resources on how to proceed to make a PDF accessible if you don't know.
Secondly, for an accessible PDF files to be effectively read accessibly, it has to be opened inside a real PDF reading program which supports tagged PDFs, like Adobe Reader.
The problem is that nowadays, most browsers have an integrated PDF viewer. These viewers usually don't support tagged PDFs, and so, even if you make an accessible PDF, it won't be accessible to the user if it is open inside that integrated browser viewer.
So you must make sure that your link or button triggers an effective download or opening in a true PDF reading program, rather than opening in an integrated viewer of the browser.
Several possibilities that may or may not work depending on OS/browser to bypass the integrated viewer. They have to be tested to make sure they work:
Send a header Content-Disposition: attachment; filename="something.pdf"
Send a Content-Type different than "application/pdf" or "text/pdf", e.g. "application/octet-stream" to fake out basic type detection
Make the link don't ends with .pdf
Use the download attribute of <a>
The most reliable are response headers. Most browsers don't rely only on file extension alone to decide what to do.
Either a link or a button is fine. The most important thing is that the user is informed about what the element does - i.e. it downloads/opens a PDF file. So, this should be reflected in the element's label, whether that is a visible text label or an icon that uses alt text or aria-label to explicitly describe the element's purpose.
I agree with Quentinc's suggestion to also inform the user upfront about the number of pages and size of the document - that's a nice touch that I don't see very often!
PDF accessibility is a whole other topic, but again as QuentinC points out, there's not much good in allowing a user to download or view a PDF that isn't accessible, so it's a good idea to ensure the PDF has been tested against JAWS/NVDA/VoiceOver/TalkBack to ensure it is readable.
Quick description - My company has a webpage that we use for responding to emails and assigning them to people (team inbox basically). The page converts all attachments (that it can) to .pdf files and each attachment/page gets converted as it's own separate .pdf so we can navigate the pages easier (I guess? At least there's a way to merge them into one file, but that opens in a new tab). These .pdf files are displayed in-line. Currently I have to use another browser for this page, due to Firefox not supporting in-line PDFs. Can anyone please advise if they have found a way to view in-line .pdfs within Firefox? Thanks in advance.
See these pics for reference -
In-line .PDFs displaying in Edge (Chromium)
Firefox not displaying
Firefox actually supports embedding PDFs in <iframe>. So this might be a problem with how this web app is written.
This example page shows it working in Firefox: https://www.w3docs.com/tools/code-editor/1077
I created a browser extension that lets you look up words in Wikipedia or Wiktionary without needing to open a new tab ( https://addons.mozilla.org/en-US/firefox/addon/in-page-lookup/ , almost done porting to Chrome). It is very useful when you are doing research and come across a word you don't know or want to know more about. The only thing is, a lot of research content is in PDF format. A long time ago (~2013ish) I had an older version of the app based on the old Firefox add-on framework and that did let iframes show up over pdf documents but this has not been the case for many years. I don't think the extension is even recognized in pdf documents, I get "Error: Could not establish connection. Receiving end does not exist" and there is no extension content script on the pdf page. So, my question is, is it possible to put an iframe over a pdf document? Do I need to work on the background side, and if so, how? Thanks.
I've worked on a requirement that allows me to show a PDF file inside a browser by doingo a Response.ContentType = "application/pdf".
The problem is that the default view of the PDF is always showing the bookmarks menu at the left, is there a way by using HTTP headers or something to tell the PDF viewer not to show the bookmarks section?
Thanks in advance.
There's two ways that you can do it. The way that I would recommend is to actually open the PDF in Adobe Acrobat and go to File, Properties. On the Initial View tab you'll see a lot of options for how to display the PDF. The second way I haven't tested but Adobe says you can pass various querystring options to the PDF. The one you'd probably want is http://example.org/doc.pdf#pagemode=none
The way how a PDF document is displayed can be configured inside the PDF document.
There are a lot of PDF editors that can modify the "viewer preferences" as it is mostly called. One free example is BeCyPDFMetaEdit.
I have a PDF document that needs to be pulled up in the browser, edited, and saved. I can save via the embedded adobe toolbar, along with all the other acrobat functions. But, what I am trying to see is if there is a way to display the PDF in a webpage alongside web controls.
For example, in the top part of the webpage I have a dropdownlist. It has a list of PDFs. I select one and the bottom part of the webpage opens up with the PDF.
Thanks.
Are you looking for something like Scribd's iPaper viewer?
You can embed it on your site or host with them.
This is typically done with an iframe.
Sorry, you'll have to use either Frames, or iFrames. Perhaps you can also get it via an <object> tag, but that might get browser-specific.
I would contact the people at ceTe (makers of DynamicPDF). Their product permits you to dynamically replace your page output with a PDF file but this involves changing the entire page (the mime-type will be pdf). Is it possible to output the page to a panel instead? I don't think so, but they would be the people I would turn to.