Trouble using wkhtmlpdf gem-CodePudding

I am having trouble using wkhtmlpdf gem on my machine. OS - ZorinOS. This is the error I am getting when trying to download or view a pdf file on the rails server -

Error: PDF could not be generated! Command Error: /home/my-user/.rvm/gems/ruby-3.0.1@somename/gems/wkhtmltopdf-binary-0.12.6.5/bin/wkhtmltopdf:61:in `<top (required)>': Invalid platform, must be running on Ubuntu 16.04/18.04/20.04 CentOS 6/7/8, Debian 9/10, archlinux amd64, or intel-based Cocoa macOS (missing binary: /home/my-user/.rvm/gems/ruby-3.0.1@somename/gems/wkhtmltopdf-binary-0.12.6.5/bin/wkhtmltopdf_zorin_16_amd64). (RuntimeError)

I tried following this command to try to resolve which I found on a GitHub issue for wkhtmltopdf_binary_gem. But this too could not solve it.

wget https://github.com/wkhtmltopdf/wkhtmltopdf/releases/download/0.12.5/wkhtmltox_0.12.5-1.bionic_amd64.deb
sudo dpkg -i wkhtmltox_0.12.5-1.bionic_amd64.deb
sudo apt -f install

Using the command type wkhtmltopdf I get wkhtmltopdf is /home/mu-user/.rvm/gems/ruby-3.0.1@somename/bin/wkhtmltopdf

CodePudding user response：

The issue seems to be because of the platform. Based on your OS it is trying to search the binary for wkhtmltopdf_zorin_16_amd64 which the gem does not have.

The best solution would be to try:

creating a symlink mentioned in the GitHub issue you linked with the question - here

ln wkhtmltopdf_ubuntu_20.04_amd64.gz wkhtmltopdf_zorin_16_amd64.gz # Not tested. Give it a try

Install supported wkhtmltopdf from the website or build from the source and pass the path using wkhtmltopdf option while generating the PDF

def show
  respond_to do |format|
    format.pdf do
    render pdf:                            'file_name',
           template:                       'articles/show',
           wkhtmltopdf:                    '/usr/local/bin/wkhtmltopdf' # path to binary
  end
end