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<div class="section" id="deploying-web-applications-in-the-cloud">
<span id="index-0"></span><h1>Deploying Web Applications in the Cloud<a class="headerlink" href="#deploying-web-applications-in-the-cloud" title="Permalink to this headline">¶</a></h1>
<p>In this chapter we will learn about deploying Ring Web Applications in the Cloud using Heroku</p>
<div class="section" id="introduction">
<span id="index-1"></span><h2>Introduction<a class="headerlink" href="#introduction" title="Permalink to this headline">¶</a></h2>
<p>We created a new project and tutorial to explain how to deploy Ring web applications in the Cloud using Heroku</p>
<p>Demo : <a class="reference external" href="http://testring.herokuapp.com/">http://testring.herokuapp.com/</a></p>
<p>Project : <a class="reference external" href="https://github.com/ring-lang/RingWebAppOnHeroku">https://github.com/ring-lang/RingWebAppOnHeroku</a></p>
<p>Heroku Website : <a class="reference external" href="https://www.heroku.com/">https://www.heroku.com/</a></p>
<img alt="Ring Web Application in the Cloud" src="_images/ringincloud.png" />
</div>
<div class="section" id="usage">
<span id="index-2"></span><h2>Usage<a class="headerlink" href="#usage" title="Permalink to this headline">¶</a></h2>
<p>To use this project and deploy it on Heroku</p>
<ol class="arabic simple">
<li><p>Create Heroku account</p></li>
<li><p>Open your Heroku account and create new application</p></li>
</ol>
<p>Example : testring</p>
<p>Note (You have to select a unique name for your application)</p>
<ol class="arabic simple" start="3">
<li><p>Open the command prompt, Create new folder : MyApp</p></li>
</ol>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>md MyApp
</pre></div>
</div>
<ol class="arabic simple" start="4">
<li><p>Open the application folder</p></li>
</ol>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>cd MyApp
</pre></div>
</div>
<ol class="arabic simple" start="5">
<li><p>Clone this projet using Git (Don’t forget the dot in the end to clone in the current directory)</p></li>
</ol>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>git clone https://github.com/ring-lang/RingWebAppOnHeroku .
</pre></div>
</div>
<ol class="arabic simple" start="6">
<li><p>Login to Heroku (Enter your Email and Password)</p></li>
</ol>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>heroku login
</pre></div>
</div>
<ol class="arabic simple" start="7">
<li><p>Add heroku (remote) to your Git project</p></li>
</ol>
<p>change testring to your application name</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>heroku git:remote -a testring
</pre></div>
</div>
<ol class="arabic simple" start="8">
<li><p>Set the buildpacks (So Heroku can know how to support your project)</p></li>
</ol>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>heroku buildpacks:add --index 1 https://github.com/ring-lang/heroku-buildpack-apt
heroku buildpacks:add --index 2 https://github.com/ring-lang/heroku-buildpack-ring
</pre></div>
</div>
<ol class="arabic simple" start="9">
<li><p>Now build your project and deploy it</p></li>
</ol>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>git push heroku master
</pre></div>
</div>
<ol class="arabic simple" start="10">
<li><p>Test your project (In the browser)</p></li>
</ol>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>heroku open
</pre></div>
</div>
</div>
<div class="section" id="ring-source-code-files-and-permissions">
<span id="index-3"></span><h2>Ring source code files and permissions<a class="headerlink" href="#ring-source-code-files-and-permissions" title="Permalink to this headline">¶</a></h2>
<p>To be able to run your new Ring scripts, Set the permission of the file to be executable using Git</p>
<p>For example, if you created a file : myscript.ring</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>git update-index --chmod=+x myscript.ring
git commit -m "Update file permission"
</pre></div>
</div>
<p>If you are using TortoiseGit, From windows explorer, select the file</p>
<p>Right click —> Properties —> Git —> Executable (+x)</p>
<p>Then commit and deploy!</p>
</div>
<div class="section" id="hello-world-program">
<span id="index-4"></span><h2>Hello World program<a class="headerlink" href="#hello-world-program" title="Permalink to this headline">¶</a></h2>
<p>file : ringapp/helloworld.ring</p>
<p>To run it : <a class="reference external" href="http://testring.herokuapp.com/ringapp/helloworld.ring">http://testring.herokuapp.com/ringapp/helloworld.ring</a></p>
<div class="highlight-ring notranslate"><div class="highlight"><pre><span></span><span class="c">#!/app/runring.sh -cgi</span>
<span class="k">see</span> <span class="s">"content-type: text/html"</span> <span class="o">+</span><span class="n">nl</span><span class="o">+</span><span class="n">nl</span>
<span class="k">see</span> <span class="s">"Hello, World!"</span> <span class="o">+</span> <span class="n">nl</span>
</pre></div>
</div>
<p>file : ringapp/helloworld2.ring</p>
<p>To run it : <a class="reference external" href="http://testring.herokuapp.com/ringapp/helloworld2.ring">http://testring.herokuapp.com/ringapp/helloworld2.ring</a></p>
<div class="highlight-ring notranslate"><div class="highlight"><pre><span></span><span class="c">#!/app/runring.sh -cgi</span>
<span class="k">load</span> <span class="s">"weblib.ring"</span>
<span class="k">import</span> <span class="n">System</span><span class="p">.</span><span class="n">Web</span>
<span class="k">new</span> <span class="n">page</span> <span class="p">{</span>
<span class="n">text</span><span class="p">(</span><span class="s">"Hello, World!"</span><span class="p">)</span>
<span class="p">}</span>
</pre></div>
</div>
</div>
<div class="section" id="application-database">
<span id="index-5"></span><h2>Application Database<a class="headerlink" href="#application-database" title="Permalink to this headline">¶</a></h2>
<p>When you depoly the application, Everything will works directly!</p>
<p>No change is required, but in practice, You will need to update the next files to use your database</p>
<p>There are two scripts to interact with the database (We are using PostgreSQL in the cloud)</p>
<p>You will need to update the connection string in these files if you will use another database</p>
<ul class="simple">
<li><p>file: ringapp/database/newdb.ring (We run it using the browser for one time to create the tables)</p></li>
<li><p>file: ringapp/datalib.ring (Class: Database)</p></li>
</ul>
<p>In your practical projects, You can write better code (To be able to change the database)</p>
<p>Also you can create configuration file (To write the connection string in one place)</p>
<p>Database service : <a class="reference external" href="https://www.heroku.com/postgres">https://www.heroku.com/postgres</a></p>
</div>
<div class="section" id="deploying-after-updates">
<span id="index-6"></span><h2>Deploying after updates<a class="headerlink" href="#deploying-after-updates" title="Permalink to this headline">¶</a></h2>
<p>Just use Git and commit then push to heroku</p>
<p>file: build.bat contains the next commands for quick tests</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>git add .
git commit -m "Update RingWebAppOnHeroku"
git push heroku master
heroku open
</pre></div>
</div>
</div>
<div class="section" id="local-tests">
<span id="index-7"></span><h2>Local Tests<a class="headerlink" href="#local-tests" title="Permalink to this headline">¶</a></h2>
<p>Local tests using Ring Notepad on Windows (Using local Apache Web Server)</p>
<p>Replace the first line in the file : ringapp/index.ring with</p>
<div class="highlight-ring notranslate"><div class="highlight"><pre><span></span><span class="c">#!ring -cgi</span>
</pre></div>
</div>
<p>Then run it from Ring Notepad (Ctrl+F6)</p>
</div>
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