Page is the smoke test for a new Rails application: it makes sure that you have your software configured correctly enough to serve a page. 4.2 Say 'Hello', Rails To get Rails saying 'Hello', you need to create at minimum a controller and a view. A controller's purpose is to receive specific requests for the application.
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To develop a web application using Ruby on Rails Framework, you need to install the following software −
We assume that you already have installed a Web Server and a Database System on your computer. You can use the WEBrick Web Server, which comes with Ruby. Most websites however use Apache or lightTPD web servers in production.
Rails works with many database systems, including MySQL, PostgreSQL, SQLite, Oracle, DB2 and SQL Server. Please refer to a corresponding Database System Setup manual to set up your database.
Let's look at the installation instructions for Rails on Windows and Linux.
Follow the steps given below for installing Ruby on Rails.
First, check if you already have Ruby installed. Open the command prompt and type ruby -v. If Ruby responds, and if it shows a version number at or above 2.2.2, then type gem --version. If you don't get an error, skip Install Ruby step. Otherwise, we'll install a fresh Ruby.
If Ruby is not installed, then download an installation package from rubyinstaller.org. Follow the download link, and run the resulting installer. This is an exe file rubyinstaller-2.2.2.x.exe and will be installed in a single click. It's a very small package, and you'll get RubyGems as well along with this package. Please check the Release Notes for more detail.
Install Rails − With Rubygems loaded, you can install all of Rails and its dependencies using the following command through the command line −
Note − The above command may take some time to install all dependencies. Make sure you are connected to the internet while installing gems dependencies.
Use the following command to check the rails version.
Output
Congratulations! You are now on Rails over Windows.
We are installing Ruby On Rails on Linux using rbenv. It is a lightweight Ruby Version Management Tool. The rbenv provides an easy installation procedure to manage various versions of Ruby, and a solid environment for developing Ruby on Rails applications.
Follow the steps given below to install Ruby on Rails using rbenv tool.
First of all, we have to install git - core and some ruby dependences that help to install Ruby on Rails. Use the following command for installing Rails dependencies using yum.
Now we will install rbenv and set the appropriate environment variables. Use the following set of commands to get rbenv for git repository.
Before installing Ruby, determine which version of Ruby you want to install. We will install Ruby 2.2.3. Use the following command for installing Ruby.
Use the following command for setting up the current Ruby version as default.
Use the following command to verify the Ruby version.
Output
Ruby provides a keyword gem for installing the supported dependencies; we call them gems. If you don't want to install the documentation for Ruby-gems, then use the following command.
Thereafter, it is better to install the Bundler gem, because it helps to manage your application dependencies. Use the following command to install bundler gem.
Use the following command for installing Rails version 4.2.4.
Use the following command to make Rails executable available.
Use the following command for checking the rails version.
Output
Ruby on Rails framework requires JavaScript Runtime Environment (Node.js) to manage the features of Rails. Next, we will see how we can use Node.js to manage Asset Pipeline which is a Rails feature.
Let us install Node.js from the Yum repository. We will take Node.js from EPEL yum repository. Use the following command to add the EPEL package to the yum repository.
Use the following command for installing the Node.js package.
Congratulations! You are now on Rails over Linux.
By default, Rails uses sqlite3, but you may want to install MySQL, PostgreSQL, or other RDBMS. This is optional; if you have the database installed, then you may skip this step and it is not mandatory that you have a database installed to start the rails server. For this tutorial, we are using PostgreSQL database. Therefore use the following commands to install PostgreSQL.
Accept the prompt, by responding with a y. Use the following command to create a PostgreSQl database cluster.
Use the following command to start and enable PostgreSQL.
Assuming you have installed Rails using RubyGems, keeping it up-to-date is relatively easy. We can use the same command in both Windows and Linux platform. Use the following command −
Output
The following screenshot shows a Windows command prompt. The Linux terminal also provides the same output.
This will automatically update your Rails installation. The next time you restart your application, it will pick up this latest version of Rails. While using this command, make sure you are connected to the internet.
You can verify if everything is set up according to your requirements or not. Use the following command to create a demo project.
Output
It will generate a demo rail project; we will discuss about it later. Facebook call add to list of allowed apps mac. Currently we have to check if the environment is set up or not. Next, use the following command to run WEBrick web server on your machine.
It will generate auto-code to start the server
Now open your browser and type the following −
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It should display a message, something like, 'Welcome aboard' or 'Congratulations'.
These are some of the steps you might have to complete, to get your own server on-line without PageKite:
Complete all those steps and you would probably be able to run your own server on a computer at home.
If you wanted to be mobile, or run a SSL secured website, or use multiple computers, the list would get much longer..
With PageKite, making a new server visible to the world is reduced running a single command:
It really is that easy - and we're working on a graphical interface to make it even easier.
openssh
and putty
clients work well.This means people do not need to install any special software in order to interact with your server - the only person who needs to know you are using PageKite, is you.
For developers, this also means PageKite is very useful when developing XML-RPC, REST services or other webhooks. You can instantly test code that interacts with with payment gateways or other remote services like Twilio or Instagram's real time API.
Every PageKite account starts with one kite name in DNS, usually something like yourname.pagekite.me
. If you pay to upgrade your account, more such names or other top level domains may become available as well.
However, even just the one name comes with infinite possibilities, as we allow you to create an unlimited number of sub-domains and we also allow you to use your own domain and create an unlimited number of CNAME records. This means that in addition to the first kite name, you can also use names like these:
Finally, as long as you are using our domain names and follow some basic naming conventions (no dots, just dashes), every name comes with automatic, zero-configuration TLS (SSL) encryption.
It's secure out of the box: all you have to do is remember to use HTTPS instead of the insecure HTTP. Instant HTTPS support makes PageKite perfect for developing Facebook apps or other secure web applications.
It came as a surprise even to us, but websites served over PageKite have been able to outperform sites served directly by the same computer, over the same Internet connection.
It's a bit technical, but here's why:
The pagekite.net front-end servers are carefully located in high-speed data centers, with world class redundant connectivity. This minimizes the time required for the initial TCP/IP hand-shake that precedes every request sent to your server.
PageKite uses adaptive compression to reduce the network traffic between your computer and the PageKite front-end servers. This is especially effective for serving websites - most requests and responses will have many things in common (style-sheets, markup, HTTP headers, cookies, even content) which makes them very amenable to compression: PageKite can effectively boost the power of your upstream Internet connection tenfold or even more.
The pagekite.net service has front-end capacity in multiple locations.
This not only allows us to minimize latency by offering you a front-end relay near you, it makes the system more reliable: local problems such as power outages or hardware malfunctions will only impact a small part of our network. Even if our own website goes down or a volcano erupts under Reykjavík, your kites will keep on flying.
Most importantly, PageKite itself is designed to gracefully deal with outages. The same features which allow it to rapidly reconnect as you move from your office LAN to your home WiFi, allow your PageKite to seamlessly route around problems on the Internet - automatically choosing the fastest front-end available to you.
Finally, all of the pagekite.net servers are automatically monitored 24/7 to ensure thate a technician will be alerted within minutes of any malfunction.
Designed with privacy and freedom in mind, PageKite helps you take control of your data without isolating you from the rest of the Internet or putting you at risk:
.pagekite.me
domain name has SSL encryption enabled by default, protecting you and your site's visitors from eavesdropping.The most important thing about PageKite and privacy, is that you don't need a Privacy Policy for your own computer. This point is so fundamental, we have dedicated an entire page to discussing it on our Open Source Wiki.