In Continue reading “PDFKit – invalid byte sequence in US-ASCII” Posted by Robert Reiz AugAugPosted in Ruby Tags: PDFKit 7 Comments on PDFKit – invalid byte sequence in US-ASCIIĪJAX Amazon-S3 Ansible Ant Apache HTTPD API ArangoDB Archetype AspectJ BluePrintCSS Capistrano Capybara Cloud Computing Continuous Updating Coockie CouchDB Dependencies DevOps dom4j EC2 Eclipse ElasticSearch GIT GitHub GPG Groovy Heroku Hibernate HTML5 IceFaces JasperReports JDBC jMeter JPA jQuery JRuby JSF JSF-2. Generating a PDF works like this: The first parameter “html” is the HTML as string. The idea behind PDFKit is that you generate the documents as HTML and CSS and then convert it to PDF. Given the code above, generating PDF files using Ruby on Rails is straightforward assuming you’re familiar with the Ruby language and the Rails framework. Perhaps the nicest aspect of the entire process is that you don’t have to learn any new markup languages or specifics about PDF generation.ĭid you find this article helpful? Don’t forget to drop your feedback in the comments section below.I’m using PDFKit at VersionEye to generate the PDF invoices. The route for a PDF invoice would be something like If you change it to will see the invoice in HTML using the markup that is used to generate the PDF. Now the show method is also responding for HTML requests in development mode. Now, we have to add some sample data to the database. $ rails generate model line_item description price:float invoice:references $ rails generate model invoice date:date client notes Start by creating a new rails app and adding three models: In this section we’re going to build a simple rails application to generate the previous “Envato Invoice” dynamically. Now let’s take a look at how to use PDFKit in the context of a Rails application, so we can dynamically generate PDF files using the data from our models. You can continue customising or styling this document as you like. This photo shows the result of the sample invoice:Īs you can see, PDFKit is very easy to use, if you are already familiar with HTML and CSS. If you run this script, the file envato_invoice.pdf will be generated. Notes: This invoice was paid on the 23rd of March 2016 using your credit card ending on 1234. In this sample, I have added a bit of CSS to style the HTML for a sample invoice, as you can see: Styling Your PDF Using CSSĮarlier I mentioned that we are going to generate PDF files using HTML and CSS. Doing a quick google search looking for any known vulnerabilities we find CVE-202225765, which tells us that this version of pdfkit is vulnerable to command injections. PDFKit.new(‘, :page_size => ‘A3’).to_file(‘google.pdf’)Īs you can see, I’m specifying the page_size-by default, A4 is used. If you want to generate a PDF from the Google homepage, you can run: PDFKit also allows you to generate a PDF from a URL. This is where we will need the PDFKit gem. Unfortunately, wkhtmltopdf cannot be used directly in our Ruby application. You should have a new file called hello.pdf with the text at the top. wkhtmltopdf is a straightforward tool that works by taking HTML and CSS, and converting it into a PDF document. CombinePDF - A Pure ruby library to merge PDF files, number pages and maybe more. Prawn - Fast, Nimble PDF Writer for Ruby. You also need to install the pdfkit gem, and then run the following bit of Ruby to generate a PDF with the text “Hello Envato!” When comparing Pdfkit and Grover you can also consider the following projects: Wicked Pdf - PDF generator (from HTML) plugin for Ruby on Rails. You can download the binary or install from Brew on Mac, or your preferred Linux repository. To start, install wkhtmltopdf on your computer. Internally, PDFKit uses wkhtmltopdf (WebKit HTML to PDF), an engine that will take HTML and CSS, render it using WebKit, and output it as a PDF with high quality. Chances are that you are already familiar with HTML and CSS, so we are going to use PDFKit to generate PDF files using HTML from standard Rails view and style code. There are many ways to generate PDFs in Ruby and Rails.
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