diff --git a/doc/03-cli.md b/doc/03-cli.md
index e4f7f9083..f179e4720 100644
--- a/doc/03-cli.md
+++ b/doc/03-cli.md
@@ -423,6 +423,12 @@ If you use a proxy but it does not support the request_fulluri flag, then you
 should set this env var to `false` or `0` to prevent composer from setting the
 request_fulluri option.
 
+### HTTPS_PROXY_REQUEST_FULLURI
+
+If you use a proxy but it does not support the request_fulluri flag for HTTPS
+requests, then you should set this env var to `false` or `0` to prevent composer
+from setting the request_fulluri option.
+
 ### COMPOSER_HOME
 
 The `COMPOSER_HOME` var allows you to change the composer home directory. This
diff --git a/src/Composer/Command/DiagnoseCommand.php b/src/Composer/Command/DiagnoseCommand.php
index 07600e0e5..1c0cf3f90 100644
--- a/src/Composer/Command/DiagnoseCommand.php
+++ b/src/Composer/Command/DiagnoseCommand.php
@@ -52,10 +52,12 @@ EOT
         $output->write('Checking http connectivity: ');
         $this->outputResult($output, $this->checkHttp());
 
-        $opts = stream_context_get_options(StreamContextFactory::getContext());
+        $opts = stream_context_get_options(StreamContextFactory::getContext('http://example.org'));
         if (!empty($opts['http']['proxy'])) {
             $output->write('Checking HTTP proxy: ');
             $this->outputResult($output, $this->checkHttpProxy());
+            $output->write('Checking HTTP proxy support for request_fulluri: ');
+            $this->outputResult($output, $this->checkHttpProxyFullUriRequestParam());
             $output->write('Checking HTTPS proxy support for request_fulluri: ');
             $this->outputResult($output, $this->checkHttpsProxyFullUriRequestParam());
         }
@@ -142,7 +144,32 @@ EOT
     }
 
     /**
-     * Due to various proxy servers configurations, some servers cant handle non-standard HTTP "http_proxy_request_fulluri" parameter,
+     * Due to various proxy servers configurations, some servers can't handle non-standard HTTP "http_proxy_request_fulluri" parameter,
+     * and will return error 500/501 (as not implemented), see discussion @ https://github.com/composer/composer/pull/1825.
+     * This method will test, if you need to disable this parameter via setting extra environment variable in your system.
+     *
+     * @return bool|string
+     */
+    private function checkHttpProxyFullUriRequestParam()
+    {
+        $url = 'http://packagist.org/packages.json';
+        try {
+            $this->rfs->getContents('packagist.org', $url, false);
+        } catch (TransportException $e) {
+            try {
+                $this->rfs->getContents('packagist.org', $url, false, array('http' => array('request_fulluri' => false)));
+            } catch (TransportException $e) {
+                return 'Unable to assert the situation, maybe packagist.org is down ('.$e->getMessage().')';
+            }
+
+            return 'It seems there is a problem with your proxy server, try setting the "HTTP_PROXY_REQUEST_FULLURI" and "HTTPS_PROXY_REQUEST_FULLURI" environment variables to "false"';
+        }
+
+        return true;
+    }
+
+    /**
+     * Due to various proxy servers configurations, some servers can't handle non-standard HTTP "http_proxy_request_fulluri" parameter,
      * and will return error 500/501 (as not implemented), see discussion @ https://github.com/composer/composer/pull/1825.
      * This method will test, if you need to disable this parameter via setting extra environment variable in your system.
      *
@@ -150,21 +177,21 @@ EOT
      */
     private function checkHttpsProxyFullUriRequestParam()
     {
-        $url = 'https://api.github.com/repos/Seldaek/jsonlint/zipball/1.0.0 ';
+        if (!extension_loaded('openssl')) {
+            return 'You need the openssl extension installed for this check';
+        }
+
+        $url = 'https://api.github.com/repos/Seldaek/jsonlint/zipball/1.0.0';
         try {
             $rfcResult = $this->rfs->getContents('api.github.com', $url, false);
         } catch (TransportException $e) {
-            if (!extension_loaded('openssl')) {
-                return 'You need the openssl extension installed for this check';
-            }
-
             try {
                 $this->rfs->getContents('api.github.com', $url, false, array('http' => array('request_fulluri' => false)));
             } catch (TransportException $e) {
                 return 'Unable to assert the situation, maybe github is down ('.$e->getMessage().')';
             }
 
-            return 'It seems there is a problem with your proxy server, try setting the "HTTP_PROXY_REQUEST_FULLURI" environment variable to "false"';
+            return 'It seems there is a problem with your proxy server, try setting the "HTTPS_PROXY_REQUEST_FULLURI" environment variable to "false"';
         }
 
         return true;
diff --git a/src/Composer/Installer/InstallationManager.php b/src/Composer/Installer/InstallationManager.php
index 55e1eef4b..2a9021324 100644
--- a/src/Composer/Installer/InstallationManager.php
+++ b/src/Composer/Installer/InstallationManager.php
@@ -251,7 +251,7 @@ class InstallationManager
                         )
                     );
 
-                    $context = StreamContextFactory::getContext($opts);
+                    $context = StreamContextFactory::getContext($url, $opts);
                     @file_get_contents($url, false, $context);
                 }
 
@@ -275,7 +275,7 @@ class InstallationManager
                 )
             );
 
-            $context = StreamContextFactory::getContext($opts);
+            $context = StreamContextFactory::getContext($repoUrl, $opts);
             @file_get_contents($repoUrl, false, $context);
         }
 
diff --git a/src/Composer/Util/RemoteFilesystem.php b/src/Composer/Util/RemoteFilesystem.php
index 8b4c4a0dc..05f99abde 100644
--- a/src/Composer/Util/RemoteFilesystem.php
+++ b/src/Composer/Util/RemoteFilesystem.php
@@ -104,7 +104,7 @@ class RemoteFilesystem
             $fileUrl .= (false === strpos($fileUrl, '?') ? '?' : '&') . 'access_token='.$options['github-token'];
             unset($options['github-token']);
         }
-        $ctx = StreamContextFactory::getContext($options, array('notification' => array($this, 'callbackGet')));
+        $ctx = StreamContextFactory::getContext($fileUrl, $options, array('notification' => array($this, 'callbackGet')));
 
         if ($this->progress) {
             $this->io->write("    Downloading: <comment>connection...</comment>", false);
diff --git a/src/Composer/Util/StreamContextFactory.php b/src/Composer/Util/StreamContextFactory.php
index d89b115f6..26590ada6 100644
--- a/src/Composer/Util/StreamContextFactory.php
+++ b/src/Composer/Util/StreamContextFactory.php
@@ -23,12 +23,13 @@ final class StreamContextFactory
     /**
      * Creates a context supporting HTTP proxies
      *
+     * @param  string            $url            URL the context is to be used for
      * @param  array             $defaultOptions Options to merge with the default
      * @param  array             $defaultParams  Parameters to specify on the context
      * @return resource          Default context
      * @throws \RuntimeException if https proxy required and OpenSSL uninstalled
      */
-    public static function getContext(array $defaultOptions = array(), array $defaultParams = array())
+    public static function getContext($url, array $defaultOptions = array(), array $defaultParams = array())
     {
         $options = array('http' => array(
             // specify defaults again to try and work better with curlwrappers enabled
@@ -64,9 +65,19 @@ final class StreamContextFactory
             $options['http']['proxy'] = $proxyURL;
 
             // enabled request_fulluri unless it is explicitly disabled
-            $reqFullUriEnv = getenv('HTTP_PROXY_REQUEST_FULLURI');
-            if ($reqFullUriEnv === false || $reqFullUriEnv === '' || (strtolower($reqFullUriEnv) !== 'false' && (bool) $reqFullUriEnv)) {
-                $options['http']['request_fulluri'] = true;
+            switch (parse_url($url, PHP_URL_SCHEME)) {
+                case 'http': // default request_fulluri to true
+                    $reqFullUriEnv = getenv('HTTP_PROXY_REQUEST_FULLURI');
+                    if ($reqFullUriEnv === false || $reqFullUriEnv === '' || (strtolower($reqFullUriEnv) !== 'false' && (bool) $reqFullUriEnv)) {
+                        $options['http']['request_fulluri'] = true;
+                    }
+                    break;
+                case 'https': // default request_fulluri to true
+                    $reqFullUriEnv = getenv('HTTPS_PROXY_REQUEST_FULLURI');
+                    if ($reqFullUriEnv === false || $reqFullUriEnv === '' || (strtolower($reqFullUriEnv) !== 'false' && (bool) $reqFullUriEnv)) {
+                        $options['http']['request_fulluri'] = true;
+                    }
+                    break;
             }
 
             if (isset($proxy['user'])) {
diff --git a/tests/Composer/Test/Util/StreamContextFactoryTest.php b/tests/Composer/Test/Util/StreamContextFactoryTest.php
index 86ee8515d..c91c1959f 100644
--- a/tests/Composer/Test/Util/StreamContextFactoryTest.php
+++ b/tests/Composer/Test/Util/StreamContextFactoryTest.php
@@ -33,7 +33,7 @@ class StreamContextFactoryTest extends \PHPUnit_Framework_TestCase
      */
     public function testGetContext($expectedOptions, $defaultOptions, $expectedParams, $defaultParams)
     {
-        $context = StreamContextFactory::getContext($defaultOptions, $defaultParams);
+        $context = StreamContextFactory::getContext('http://example.org', $defaultOptions, $defaultParams);
         $options = stream_context_get_options($context);
         $params = stream_context_get_params($context);
 
@@ -60,7 +60,7 @@ class StreamContextFactoryTest extends \PHPUnit_Framework_TestCase
         $_SERVER['http_proxy'] = 'http://username:password@proxyserver.net:3128/';
         $_SERVER['HTTP_PROXY'] = 'http://proxyserver/';
 
-        $context = StreamContextFactory::getContext(array('http' => array('method' => 'GET')));
+        $context = StreamContextFactory::getContext('http://example.org', array('http' => array('method' => 'GET')));
         $options = stream_context_get_options($context);
 
         $this->assertEquals(array('http' => array(
@@ -77,7 +77,7 @@ class StreamContextFactoryTest extends \PHPUnit_Framework_TestCase
     {
         $_SERVER['http_proxy'] = 'http://username:password@proxyserver.net:3128/';
 
-        $context = StreamContextFactory::getContext(array('http' => array('method' => 'GET', 'header' => array("X-Foo: bar"), 'request_fulluri' => false)));
+        $context = StreamContextFactory::getContext('http://example.org', array('http' => array('method' => 'GET', 'header' => array("X-Foo: bar"), 'request_fulluri' => false)));
         $options = stream_context_get_options($context);
 
         $this->assertEquals(array('http' => array(
@@ -94,7 +94,7 @@ class StreamContextFactoryTest extends \PHPUnit_Framework_TestCase
     {
         $_SERVER['http_proxy'] = 'http://username:password@proxyserver.net';
 
-        $context = StreamContextFactory::getContext(array('http' => array('method' => 'GET')));
+        $context = StreamContextFactory::getContext('http://example.org', array('http' => array('method' => 'GET')));
         $options = stream_context_get_options($context);
 
         $this->assertEquals(array('http' => array(
@@ -115,7 +115,7 @@ class StreamContextFactoryTest extends \PHPUnit_Framework_TestCase
         $_SERVER['http_proxy'] = $proxy;
 
         if (extension_loaded('openssl')) {
-            $context = StreamContextFactory::getContext();
+            $context = StreamContextFactory::getContext('http://example.org');
             $options = stream_context_get_options($context);
 
             $this->assertEquals(array('http' => array(
@@ -161,7 +161,7 @@ class StreamContextFactoryTest extends \PHPUnit_Framework_TestCase
                 )
             )
         );
-        $context = StreamContextFactory::getContext($options);
+        $context = StreamContextFactory::getContext('http://example.org', $options);
         $ctxoptions = stream_context_get_options($context);
         $this->assertEquals(join("\n", $ctxoptions['http']['header']), join("\n", $expectedOptions['http']['header']));
     }