Support HTTPS Solr server

Fixes: #267

library/Solarium/Core/Client/Endpoint.php

@@ -54,6 +54,7 @@ class Endpoint extends Configurable
      * @var array
      */
     protected $options = array(
+        'scheme'  => 'http',
         'host'    => '127.0.0.1',
         'port'    => 8983,
         'path'    => '/solr',
@@ -210,6 +211,27 @@ class Endpoint extends Configurable
         return $this->getOption('timeout');
     }
 
+    /**
+     * Set scheme option
+     *
+     * @param  string  $scheme
+     * @return self Provides fluent interface
+     */
+    public function setScheme($scheme)
+    {
+        return $this->setOption('scheme', $scheme);
+    }
+
+    /**
+     * Get scheme option
+     *
+     * @return string
+     */
+    public function getScheme()
+    {
+        return $this->getOption('scheme');
+    }
+
     /**
      * Get the base url for all requests
      *
@@ -219,7 +241,7 @@ class Endpoint extends Configurable
      */
     public function getBaseUri()
     {
-        $uri = 'http://' . $this->getHost() . ':' . $this->getPort() . $this->getPath() . '/';
+        $uri = $this->getScheme() . '://' . $this->getHost() . ':' . $this->getPort() . $this->getPath() . '/';
 
         $core = $this->getCore();
         if (!empty($core)) {

tests/Solarium/Tests/Core/Client/EndpointTest.php

@@ -48,6 +48,7 @@ class EndpointTest extends \PHPUnit_Framework_TestCase
     public function testConfigMode()
     {
         $options = array(
+            'scheme' => 'http',
             'host' => '192.168.0.1',
             'port' => 123,
             'path' => '/mysolr/',
@@ -99,6 +100,12 @@ class EndpointTest extends \PHPUnit_Framework_TestCase
         $this->assertEquals(7, $this->endpoint->getTimeout());
     }
 
+    public function testSetAndGetScheme()
+    {
+        $this->endpoint->setScheme('https');
+        $this->assertEquals('https', $this->endpoint->getScheme());
+    }
+
     public function testGetBaseUri()
     {
         $this->endpoint->setHost('myserver')->setPath('/mypath')->setPort(123);
@@ -106,6 +113,13 @@ class EndpointTest extends \PHPUnit_Framework_TestCase
         $this->assertEquals('http://myserver:123/mypath/', $this->endpoint->getBaseUri());
     }
 
+    public function testGetBaseUriWithHttps()
+    {
+        $this->endpoint->setScheme('https')->setHost('myserver')->setPath('/mypath')->setPort(123);
+
+        $this->assertEquals('https://myserver:123/mypath/', $this->endpoint->getBaseUri());
+    }
+
     public function testGetBaseUriWithCore()
     {
         $this->endpoint->setHost('myserver')->setPath('/mypath')->setPort(123)->setCore('mycore');