Navigation Timeout on generating pdf

[atif]

I'm getting a navigation timeout randomly (majorly if I refresh the page). I have a rails end point that returns a pdf generated by Grover (to_pdf). It works fine on first page load but if I refresh the page (it kinda gets unresponsive and results in a navigation timeout).

Also, if change some contents of the html.erb and refresh the page, i get navigation timeout.

Any idea about how to fix this?

[abrom]

You're going to have to provide a little context around how you're actually using Grover. What have you tried in the way of debugging ??

[itsmegrave]

I think I have a similiar issue here.
Using the debugging variables, I found this error:

(irb):1:in `<main>': Failed to launch the browser process! undefined (Grover::JavaScript::Error)
[31:49:0912/143900.690452:ERROR:bus.cc(407)] Failed to connect to the bus: Failed to connect to socket /var/run/dbus/system_bus_socket: No such file or directory
[31:31:0912/143900.710846:ERROR:ozone_platform_x11.cc(244)] Missing X server or $DISPLAY
[31:31:0912/143900.710930:ERROR:env.cc(258)] The platform failed to initialize.  Exiting.

But I think this error is caused by turn off the headless mode 🤔
Using Ruby 3.1.6, Puppeteer 22.13.1 and Grover 1.1.9, inside a docker container.

The error in rails console is (irb):2:in

': Network.enable timed out. Increase the 'protocolTimeout' setting in launch/connect calls for a higher timeout if needed. (Grover::JavaScript::ProtocolError). Increased the protocolTimeoutto300_000` still have the problem (Before I was using Ruby 3.1.2, Puppeteer 18.2.1)

[abrom]

No, this does not appear to be a similar issue. The error message is telling you what your problem is.

Missing X server or $DISPLAY

LMGTFY: puppeteer/puppeteer#8148

[Arns]

I seem to have a similar issue when using rails 7 stack with grover. It will randomly timeout on the same requests - sometimes it processes within a second or two fine, other times it will hang indefinitely and always time out.

Grover::JavaScript::TimeoutError - Timed out after waiting 60000ms:

        html = render_to_string(
          template: 'picklists/document',
          layout: 'pdf',
          locals: { picklist: @picklist },
          formats: [:html],
          handlers: [:erb]
        )
        grover = Grover.new(html, format: 'A4', landscape: true, timeout: 60000, wait_until: 'domcontentloaded')
        pdf = grover.to_pdf

I've tried messing with timeout and wait_until, but no success. Something strange is happening but not sure where to investigate logs since nothing helpful shows up in the rails server logs.

[Arns]

Actually, after experimenting a little bit, wait_until: 'domcontentloaded' might have actually fixed it. Need some time to see.

EDIT

IT's still an issue. Here is stack trace when running test suite:

     Grover::JavaScript::TimeoutError:
       Timed out after waiting 30000ms
     # /usr/share/rvm/gems/ruby-3.3.6/gems/grover-1.2.1/lib/grover/processor.rb:93:in `call_js_method'
     # /usr/share/rvm/gems/ruby-3.3.6/gems/grover-1.2.1/lib/grover/processor.rb:20:in `convert'
     # /usr/share/rvm/gems/ruby-3.3.6/gems/grover-1.2.1/lib/grover.rb:51:in `to_pdf'
     # ./app/mailers/invoice_mailer.rb:24:in `send_invoice_to_email'

[Arns]

@atif do you have the display_url set? That's what fixed my issues. Note that it must be a fully qualified URL with http(s)://... Ex:
display_url: Rails.configuration.x.grover.base_url,

[fabdbt]

@atif do you have the display_url set? That's what fixed my issues. Note that it must be a fully qualified URL with http(s)://... Ex: display_url: Rails.configuration.x.grover.base_url,

Fixed my random timeouts as well, maybe it should be more highlighted in README

[abrom]

Would be happy to accept a PR that improves documentation 😄