Return pdf file from show action-CodePudding

I implemented a show action to retrieve a pdf file url

 namespace :api do
   namespace :v2 do
     get '/patients/:id', to: 'patients#show'
   end
 end

http://localhost:3005/api/v2/patients/1894

{
    "id": 1894,
    "name": "Test",
    "file": {
        "url": "https://some-url-com"
    },
    "student_id": 20998,
    "created_at": "2019-07-02T13:27:10.975-04:00",
    "updated_at": "2019-07-02T13:54:53.248-04:00",
    ....
    ....
}

If a user accesses the show link then it should just return pdf file. I am trying to open pdf from the show endpoint. I tried following methods in controller but not having luck

patient = Patient.find(params[:id])
open(patient.file.url).read

also tried send_file

send_data patient.file.url, :type => "application/pdf", :disposition => 'attachment'

but not having luck. Is there any way I can have show url return pdf?

CodePudding user response：

First, get the file:

require 'open-uri'

download = open('https://some-url-com')

IO.copy_stream(download, 'tmp/my_document.pdf')

Then send the file as part of your JSON:

pdf_filename = File.join(Rails.root, 'tmp/my_document.pdf')

# add this to your JSON where desired
send_file(pdf_filename, :filename => 'your_document.pdf', :type => 'application/pdf')

CodePudding user response：

A simple way:

require "open-uri"

file = URI.open("https://some-url-com") # ruby 3  must use URI.open

# it's a File (or Tempfile), you can do file things to it
# file       # => #<File:/tmp/open-uri20220818-414775-wdh4sb>
# file.path  # => /tmp/open-uri20220818-414775-wdh4sb
# file.read  # => "%PDF-1.5\n%\xE4\xF0\xED\xF8\n8 ..."

send_data file.read, type: "application/pdf"
# or
send_file file.path, type: "application/pdf"