css

Correct configuration to fix CORS issue with CloudFront

If you are using CloudFront for hosting static assets and having trouble with the CORS which prevents the icons from displaying properly on your website, in this post, I am going to show how to resolve this issue. As you have already known, the main cause of CORS issue is

deployment

How to add 304 Not Modified Header to your static assets on Nginx

If you are a web developer, there is one thing to which you should pay attention: Static assets on your hosts should be cached by the browsers if it does not change very often. More specifically, when you request the assets (CSS + JS) for the first time, the files will

rails

Gem Idol: Friendly Id

This week, I would like to introduce a gem which is being used in almost every project I have been working on. And it becomes more important for us nowadays because everyone want their website to be SEO efficiently. Link: https://github.com/norman/friendly_id Developed by: Norman Clarke

rails

Custom dialog for data-confirm in Rails

Every Rails developers might be already familiar with data-confirm attribute for a link. It is used to ask for user confirmation before executing the action on behalf of user. Here is one example <%= link_to "Delete", post_path(post), method: :delete, confirm: "Are you sure?"

rails

Twitter Bootstrap 3 + Rails 4: Fix issue which prevents fonts from loading

Normally, there are two basic ways to integrate Twitter Bootstrap into your Rails application 2. Install a twitter boostrap gem and do a little configuration 3. Manually copy Bootstrap JS + CSS + Fonts into your app The first option is quite easy and many people choose to follow this one. There

best practices

Hey Juniors, Here are simple things you should do to show your professional styles

You have just graduated from university and started your professional career as software developer? Here are some tips which will help you become more professional in the eyes of your manager and co-workers. These tips are based on my experience when working with many young developers. And they are the

rails

Gem Idol: Figaro

Today, I really want to start something different which I believe would be very helpful to new Rails developers. I remember the time when I first came to Rails world, I was impressed with its amazing community and gem ocean. I could find almost every thing I needed which has

rails

Running Faye server on AWS ElasticBeanstalk with Load Balancer

One of the amazing features you want to build in your application is the ability to deliver content to users in real-time without requiring them to refresh the browsers. You can achieve this by sending requests in fixed interval to the server to get changes or you can have a

rails

Prevent AuthLogic from automatically logging in after creating new user

Last week, I was helping my friend solve an annoying issue in AuthLogic which took me and my colleagues few hours to figure out the solution. And I would like to share it here so that you can avoid this issue in the future and save your day. We were

rails

Several tools to monitor your Rails application

After your Rails application is deployed to server, there would be tons of things could happen to your app which you have never expected when running the app in your local environment. In that case, you definitely want to have a tool to support you monitoring the application and quickly

troubleshooting

How to resolve "Cannot create a QPixmap when no GUI is being used" when running wkhtmltopdf

Few days ago, I got a request from my customer to make changes to PDF exporting feature which involve putting watermark inside PDF file. The existing setup in the project was like this: all necessary information are presented in HTML file and then this HTML file is converted into PDF

rails

How to fix 403 Fobidden issue on Nginx + Rails application

I have been setting up many servers for several clients using the combination of Nginx + Passenger or Nginx + Unicorn. And one of the most common issues I see when installing and configuring Nginx is 403 Forbidden error. And in this post, I am going to point out several reasons and

rails

Run delayed_job, cronjob and sidekiq on ElasticBeanstalk with Ruby on Rails application

ElasticBeanstalk could be an easy tool for you to deploy your Ruby on Rails application. But if you want to customize your application further, it is not easy at all. In this post, I am going to show how you can run several common processes when deploying your application. First,

git

You should always commit Gemfile.lock and schema.rb

One of common mistakes I see with new (and some experienced) Ruby on Rails programmers is that they do not commit Gemfile.lock and schema.rb very often to source control version such as Git or SVN. I personally think that it is generally bad practices and we should commit

rails

Resolve CORS fonts issue on Firefox (and now Chrome too) with Rails assets pipeline

Update If you are having this issue with CloudFront and you have access to Nginx or Apache server, you should read this post: Correct configuration to fix CORS issue with CloudFront When using custom fonts such as FontAwesome or Glyphicon, you might realize that some icons disappear on Firefox (or

rails

How to convert HTML views into PDF in Rails

One of the most popular programs to convert HTML to PDF is wkhtmltopdf. And in this post, I am going to show you how to use wicked_pdf gem to quickly export your views into PDF using this program. First, you would need to install wkhtmltopdf program in your platform