How do i get the url of certificate generated using prawn? - ruby-on-rails

Question

i know how to render it in webapp but i'm supposed to generate pdf through an api call , so i need to send url of the pdf generated instead of the pdf itself ( thats what the mobile developer is asking for ) , is there any way to do it ?
like:
respond_to do |format|
format.pdf do
pdf = CustomCertificatePdf.new(current_user, tutorials)
url = pdf.link
# send_data pdf.render, filename: "custom_certificate_#{current_user.first_name.downcase}_#{current_user.last_name.downcase}.pdf",
# type: "application/pdf",
# disposition: "inline"
render :json => {url: url}
end
end
even your slight hint will be appreciated , thanks :)

Answer 1

save pdf to public folder or upload to another server( S3, google drive, dropbox, ...)
then use that link in api controller
if you save pdf file in public folder, the link should be your host name + relative path with public folder
ex:
file_path = "/webapp/public/pdf/custom_certificate.pdf"
the link should be
http://yourhostname.com/pdf/custom_certificate.pdf
If you need protect your file, you should write another controller to serve it with authentication

Answer 2

This is what i ended up doing
pdf = CustomCertificatePdf.new(current_user, tutorials)
#filename = File.join("custom_certificate_#{current_user.first_name.downcase}_#{current_user.last_name.downcase}.pdf")
pdf.render_file #filename
current_user.cust_cert = File.open("custom_certificate_#{current_user.first_name.downcase}_#{current_user.last_name.downcase}.pdf")
current_user.save!
render :json => {url: "#{current_user.cust_cert}"}
in user model
has_mongoid_attached_file :cust_cert,
:default_url => "",
:path => ':attachment/:id/:cust_cert',
:storage => :s3,
:url => ':s3_domain_url',
:s3_credentials => File.join(Rails.root, 'config', 's3.yml')
validates_attachment_content_type :cust_cert, :content_type => [ 'application/pdf' ], :if => :cust_cert_attached?
def cust_cert_attached?
self.cust_cert.file?
end