I am using an IFrame to display a PDF which is sourced from a Base64 byte string. My frame tag looks like the below (I'm using Angular).
<iframe id="pdfV" type="application/pdf" [src]="currentBase64"></iframe>
The currentBase64 variable starts with data:application/pdf;base64, and has been appropriately sanitized. On any browser it works great. However, when I am in responsive mode in Chrome, or viewing on a phone, it doesn't display the frame for some reason. The only other example I can provide is the below
http://pdfmake.org/playground.html
This playground is doing the same thing I am. Passing Base64 to IFrame to display PDF. Notice is works great until you put the screen into responsive mode -- at that point it stops refreshing.
I believe it has to do with the Base64 part of it all because when I change my frame tag to something simple such as the below it works great, even on mobile devices.
<iframe [src]="'https://www.google.com'"></iframe>
Any thoughts or solutions?
Related
I'm experiencing difficulty trying to get the download attribute to work on anchor tags when downloading PNGs from a canvas, via data URL.
Essentially I would like to draw to an HTML5 canvas, and download the drawing as a png. I've been using canvas.toDataURL() to generate the href attribute, though the attached examples use premade data URLs.
It would appear that on Google Chrome for iOS, the download attribute is not functioning properly. The downloaded file is simply called "document" with no extension, which makes it impossible to save the image to my iPhone's camera roll. All other browsers I've worked with have not had this problem (Chrome for Mac and PC, and Safari for Mac and iOS).
Here is a link to a test page on my website that demonstrates the issue. Here is a link to my Codepen, though it behaves differently (the Codepen fails to download anything, and simply opens the image).
The relevant code is as follows: (I've shortened the Data URL)
<a download='test.png' target='_blank' href='data:image/png;base64,iV...gg=='>Click me to download</a>
<br><br>
<img src='data:image/png;base64,iV...gg=='>
Is there any way to ensure that the downloaded file has a .png extension?
I need to embed a PDF file in an HTML page for the users to see it on every major device.
Most of the approaches work fine on desktop but they start to show problems on iPad devices. The PDFs are no longer scrollable if placed inside an iframe or embed tag.
I used the following techniques to overcome the problem:
1) Using pdf-image for node and converting the PDF to images and then sliding them in a div.
The problem in this approach is that the image quality gets degraded and is not suitable for viewing on Web.
2) Using PDF.js by Mozilla
It works fine on every device but it makes the page extremely slow and unresponsive on iPad
3) Using Google PDF viewer
<iframe src="https://docs.google.com/viewer?url=http://public-Url-of-pdf.pdf&embedded=true" frameborder="0" height="500px" width="100%"></iframe>
The problem with this approach is that I need to make my PDFs publicly available which I don't want to do for security reasons.
None of the above method is working for me. Is there any solution available to embed PDF in a page which works on iPad also.
One of my colleagues told me about using LibreOffice(open office) headless to embed PDFs in my page but I cannot find any documentation about it usage?
Can anyone please help? :(
Thanks in advance!
<embed src="http://example.com/the.pdf" width="500" height="375" />
Try above one for pure HTML. But another option is if you'd like to use with javascript, try Pdf.js by mozilla. https://github.com/mozilla/pdf.js
I think the simplest way to embed a PDF into a web page is to use the object tag:
<object data="assets/test.pdf" type="application/pdf" width="100%" height="800px">
<p>It appears you don't have a PDF plugin for this browser.
No biggie... you can <a href="assets/test.pdf">click here to
download the PDF file.</a></p>
</object>
What the code above will do is:
- If the user browsing your site has a PDF viewer plugin (which is included by default in some browsers) it will open the PDF in the browser:
- If the user does not have a PDF viewer plugin, they will be presented with a link to download the PDF and view it on their site.
I spent a lot of time with this issue and finally reached a solution for embeeding PDFs in a HTML files, also inspired by this post. You mentioned that "converting the PDF to images and then sliding them in a div" was not satisfactory due to quality problems. Here I experienced the same since the images were blurry.
However, I tried converting the images to SVG instead of PNG and the situation was a different one: The fonts were crystal-clear when embedding the image like below:
<object type="image/svg+xml" data="https://ik.imagekit.io/nudvztcu8my/pdf2svg_example_Ft2FQgqWaG.svg">
<!-- Your fall back here -->
<img src="https://ik.imagekit.io/nudvztcu8my/pdf2svg_example_Ft2FQgqWaG.svg" />
</object>
You can directly paste that snippet into a HTML file and you will see the result. For producing this example I used a ramdom PDF from ArXiv.org and converted it to SVG using an online converter.
There are also free command line tools like pdf2svg or commerical APIs like Aspose and probably it is worth examining which approach gives the best results.
You can easily build a slider which is loading the SVG images dynamically and it is even possible to scale them to different viewports due to the vector character of the SVG images. The approach so far worked for all PDFs I tried but probably it is recommendable to implement a fallback solution still using PNGs.
I want to open the pdf file in an iframe. I am using following code:
<a class="iframeLink" href="https://something.com/HTC_One_XL_User_Guide.pdf"> User guide </a>
It is opening fine in Firefox, but it is not opening in IE8.
Does anyone know how to make it work also for IE ?
Using an iframe to "render" a PDF will not work on all browsers; it depends on how the browser handles PDF files. Some browsers (such as Firefox and Chrome) have a built-in PDF rendered which allows them to display the PDF inline where as some older browsers (perhaps older versions of IE attempt to download the file instead).
Instead, I recommend checking out PDFObject which is a Javascript library to embed PDFs in HTML files. It handles browser compatibility pretty well and will most likely work on IE8.
In your HTML, you could set up a div to display the PDFs:
<div id="pdfRenderer"></div>
Then, you can have Javascript code to embed a PDF in that div:
var pdf = new PDFObject({
url: "https://something.com/HTC_One_XL_User_Guide.pdf",
id: "pdfRendered",
pdfOpenParams: {
view: "FitH"
}
}).embed("pdfRenderer");
This is the code to link an HTTP(S) accessible PDF from an <iframe>:
<iframe src="https://research.google.com/pubs/archive/44678.pdf"
width="800" height="600">
Fiddle: http://jsfiddle.net/cEuZ3/1545/
EDIT: and you can use Javascript, from the <a> tag (onclick event) to set iFrame' SRC attribute at run-time...
EDIT 2: Apparently, it is a bug (but there are workarounds):
PDF files do not open in Internet Explorer with Adobe Reader 10.0 - users get an empty gray screen. How can I fix this for my users?
It also important to make sure that the web server sends the file with Content-Disposition = inline.
this might not be the case if you are reading the file yourself and send it's content to the browser:
in php it will look like this...
...headers...
header("Content-Disposition: inline; filename=doc.pdf");
...headers...
readfile('localfilepath.pdf')
The direct PDF didn't work on Mobile phones and it doesn't support responsive UI.
Here is the best solution.
https://stackoverflow.com/a/66548544/2078462
Do it like this: Remember to close iframe tag.
<iframe src="http://samplepdf.com/sample.pdf" width="800" height="600"></iframe>
For months I've been noticing embedded youtube videos appear white on any other page, now I found out that I can watch those videos by inspecting the page and putting -nocookie at the hostname of the iframe src, i.e. https://www.youtube-nocookie.com/embed/(VIDEO_ID).
I want to know why this happen and how to fix it, my first thought was to make an userscript to change it in every page.
EDIT: It works fine on Edge and Firefox but not on Chrome, even though my settings for cookies are enabled.
SOLUTION: The problem was that my userscript on Tampermonkey extension (which was supposed to affect the youtube page) was affecting every page with an embedded video, from now on I can figure it out what part of the code was doing that but for now it's turned off.
Thanks to #JasonB for the suggestion about extensions.
This -nocookie url came out almost a decade ago when cookies were still often turned off. This codepen shows that the standard youtube embed code works just fine on a simple site.
<iframe width="400" height="300"
src="https://www.youtube.com/embed/9Ht5RZpzPqw" frameborder="0"
gesture="media" allow="encrypted-media" allowfullscreen=""></iframe>
https://codepen.io/anon/pen/baqdGz
Are there any details about your domain or a link to a broken embedded video on your site that might help us better troubleshoot your issue?
The thumbnail worked just fine, I left it open for 5 minutes and then played the video, and that is all functional. Looks like there's one js error related to the codepen setup - not what you're experiencing.
I'm working on generating pdfs that contain the image from a html canvas element. I've managed to get an implementation of that working, but I'm having trouble opening the result in a useful way.
PDF.dataURI() returns a string that looks like data:application/pdf;base64,BASE64_ENCODED_PDF_HERE.
I'm currently using window.location = certificate.dataURI() to open up the pdf. I already tried window.open, but Safari wouldn't play nice with it.
RESULTS:
In Firefox, this saves a file that is a random name, followed by .pdf(1).part.
In Safari (desktop and mobile), it opens the PDF in the same tab, but doesn't bring up any pdf viewer interface.
In Chrome, it opens the PDF in the same tab and brings up the PDF interface.
Basically, my question is how to open a string of that format inside of the browser as a PDF, ideally in a new tab.
Any thoughts?
You can use iframes to view the pdf like below
<object data="data:application/pdf;base64, your_base64_data" type="application/pdf">
<iframe src="https://docs.google.com/viewer?&embedded=true"></iframe>
</object>
have you tried document.location.href ?
you can try to control UI interface for PDF viewer from appropriate options inside generated pdf but browser may ignore it, so as al