Re: [chromium-dev] How to delay print to PDF

[Lei Zhang]

+headless-dev
-chromium-dev

On Wed, Jul 26, 2017 at 10:45 PM, עופר בר <ofer...@gmail.com> wrote:
> Hi,
>
> I am using headless chromium on Windows 10 (Version 62.0.3166.0 (Developer
> Build) (64-bit)) to print a web application report running on Tomcat/Java
> server and angular 2 client into a PDF file (product in development)
>
> If I'm using this:
>
> chrome --headless --disable-gpu --print-to-pdf=my.pdf https://angular.io
>
> I get a the PDF result just fine.
>
> But when running locally to the Tomcat/Java server:
>
> chrome --headless --disable-gpu --print-to-pdf=my.pdf
> http://localhost/report/1
>
> I get an empty PDF file (no content).
>
> My guess is that the specific report page takes longer to render, as it has
> to make few REST calls to the server to build the report.
>
> My question: is there any way to add a delay in Chromium before printing to
> PDF?
>
> I also tried to run nodeJS wrapper code such as: simple-headless-chrome, but
> it uses Chrome and not Chromium, so it's not good for me.
>
> Any idea would be greatly welcome!
>
> Thx
>
> Ofer
>
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[dvallet (Chromium)]

Headless chrome should wait until the page is loaded before printing to PDF, but yeah maybe the REST calls are triggered after the load event is fired.

Try saving a screenshot with --screenshot=screen.png and see what it draws, if it's blank also then you are on the right track. 

For NodeJS, I believe you can pass the executable path to simple-headless-chrome so that it uses your binary. Then you can just wait until all the loading is done

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[עופר בר‎]

screenshot also shows a blank page.

Thanks for your reply!

[suraj0...@gmail.com]

I am having same problem.
Any one found solution without nodeJs?