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PDF generation has always been a big part of my apps, and so wkhtmltopdf-binary heroku the years I've tried a lot of the different PDF libraries. I've used PrawnPDF which is great, but has it's own language. I've also used wkhtmltopdf and most recently PhantomJS. However, they've all had different wkhtmltopdf-binary heroku, either with stability or the quality of wkhtmltopdf-binary heroku html to pdf conversion. Custom fonts have been the toughest part to get right, usually failing unexpectedly and without warning.

So when I heard Google were adding a "headless" mode in Chrome, and also releasing a Node. However, running a node. Headless is great because it means we can use much of the same functionality of a normal Chrome browser, but can wkhtmltopdf-binary heroku run entirely on a remote server.

You can interact with websites in code. This is the same idea behind wkhtmltopdf and PhantomJs but puppeteer is powered by a modern and maintained browser. Resulting PDF's from my experiments so far look perfect! Firstly, make sure you have npm and node installed and with a recent version I'm using 8.

To get node running alongside Rails, this great article helped wkhtmltopdf-binary heroku on the right track: It will ask you some questions, I went with the default for everything, except that I named my entry point file for wkhtmltopdf-binary heroku.

Create a new wkhtmltopdf-binary heroku, which wkhtmltopdf-binary heroku take care of wkhtmltopdf-binary heroku in the node modules on new dev or test machines: Add the puppeteer module.

The --save and --save-exact makes sure it also pulls in it's dependencies:. I added the node version Wkhtmltopdf-binary heroku want to use, directly into the package. Once you have everything above setup, you can create PDF's with Puppeteer from the Terminal to see some actual results. Replace the contents of pdf. One thing that caused me some issues was that the example does not include catching and handling errors in a way that won't leave zombie browser processes running on your server, eventually eating up all memory and CPU: This makes sure to still close the browser and process, if any errors wkhtmltopdf-binary heroku thrown in your script.

I've also added the wkhtmltopdf-binary heroku and --disable-setuid-sandbox flags, as they are currently needed to run Chrome headless on Heroku.

It is not recommended running it like this, as it can introduce security issues. I also replaced the hardcoded path of wkhtmltopdf-binary heroku website and the path for saving the PDF, with arguments that we pass in instead much like params in Rails:. Once done, you should have a PDF file called output.

If you've ever used PhatomJS or another binary from within Ruby, then this part will feel familiar. All you need to do, is call the system command within Ruby.

This great flowchart explains which one to choose, depending on wkhtmltopdf-binary heroku use case: Getting things running on Heroku wkhtmltopdf-binary heroku actually quite straightforward, as it's really just a matter of adding the correct buildpacks to your application. I'm going to assume you are adding this to an existing Rails project running on Heroku already. Keep in mind that Heroku's filesystem should not be used for persistence, however you can use Tempfiles and they will be there for the duration of the request.

In terminal, run the following command to see which buildpacks you are running on. I'm on Cedar stack. First you need to add the puppeteer buildpack, to run before your Ruby buildpack Ruby should always be last, as that is what will actually be handling the web wkhtmltopdf-binary heroku etc.

The --index 1 puts it in the 1st position:. Now add the node buildpack to position 1, so the final order is node, puppeteer and then ruby:. Push to Heroku and follow the build logs!! You should see everything wkhtmltopdf-binary heroku, and finally your Ruby app starts per normal. From this wkhtmltopdf-binary heroku on, you can call any puppeteer script in the same way, so you are not limited to PDF generation. For example, I'm experimenting with the page.

As mentioned earlier, keep an eye on memory and CPU usage though, we all know how much Chrome loves both ; I've wkhtmltopdf-binary heroku it using about Mb per chrome instance, and as long as you close browsers and the process in your scripts, it's been very stable. It can also be configured to use full non-headless Chrome. I'm not saying the below is a good idea, or even that I know what Wkhtmltopdf-binary heroku am doing. Ignore the folder that will contain puppeteer and any other node module: The --save and --save-exact makes sure it also pulls in it's wkhtmltopdf-binary heroku The example PDF code for puppeteer looks wkhtmltopdf-binary heroku to this: I also replaced the hardcoded path of the website and the path for wkhtmltopdf-binary heroku the PDF, with arguments wkhtmltopdf-binary heroku we pass in instead much like params in Rails: So in your Rails controller, you can now do this: Getting it wkhtmltopdf-binary heroku running on Heroku Getting things running on Heroku is actually quite straightforward, as it's really just a matter of adding the correct buildpacks to your application.

The --index 1 puts it in the 1st position: Now add the node buildpack to position 1, so the final order is node, puppeteer and then ruby: Commit all of your changes: Feel free to ask any questions in the comments, or point out things I missed:

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At mobalean we love to build innovative web services for Japan and the world. Our experience will help transform your ideas into successful online services. Mobalean is lead by Henri Servomaa, the original founder and mobile developer. At Mobalean we strive to develop services which are loved by our clients and users. By working in an agile manner, quickly adapting to changing requirements, we can deliver quickly and often. Hailing from Finland, Henri has a long history with computers and the internet.

In , he joined a company to develop mobile sites for the Japanese market and has been involved in mobile ever since. Cleve Lendon is a Canadian engineer who has been contracting for Mobalean. He came to Tokyo in , and has lived here ever since.

He has broad experience as a software developer, which includes development of mainframe software, Internet applications and mobile apps Android and iOS. He is especially skilled at writing Java applications vd. Simredo 4, Grafikilo When not programming, Cleve enjoys improv acting and studying languages, such as Latin and Esperanto. Our strength is crafting web services for both Japanese and international markets. We bring our technical and cultural experience to help you adapt your ideas into successful products.

We develop with Ruby on Rails and use the best agile practices and tools, such as test driven development and continuous integration to achieve quality. We are the leading provider of technical expertise about the Japanese mobile web. Mobalean started when the smartphones were just appearing on the market. Our Keitai Web Technology Guide is a quick starting point for learning about the initial challenges of Japanese mobile development.

Although the technology stacks have changed since the proliferation of iOS and Android, some of the idiosyncrasies remain. Most notably, the Japanese market is still very much dominated by the big three carriers: DoCoMo , au and Softbank. Developers can find more technical details in our Keitai-Dev Wiki. Please contact us with your specific requirements.

Posted by Michael Reinsch on We used the PDFKit gem https: Anyway, pretty easy, no? You can download it from http: After deploying to Heroku, the second issue you are likely to notice is the following: Requesting a PDF page just sits there for a while and then returns an application error. That is because you are most likely using external stylesheets and wkhtmltopdf will request them in order to generate the PDF.

Serving all your assets altogether from S3 works of course, but makes deployment to Heroku harder. The solution we employed in the end was to avoid the additional requests entirely and instead embed the printing styles into the HTML itself, using the following code in the layout HAML:. The downside of this solution is though that we need to have a static print.

The third challenge we had to address was caused by using non-Latin script, Japanese in our case. There are no Japanese fonts installed on Heroku though. Fortunately we could come up with a way to install the required font within the Heroku environment.

Henri Servomaa Hailing from Finland, Henri has a long history with computers and the internet. They have moved to Doorkeeper KK, a company they established in Both are now actively developing the doorkeeper platform. Others Originally developed here, Doorkeeper can now be found at doorkeeper inc.

PDF generation and Heroku. Cooking up Rails Plugins. Easy Event Ticketing and Check-in. Specs on all Japanese Mobiles.