From 18cc1a4d3ec36117d38ae0b15df0f751aa2150cd Mon Sep 17 00:00:00 2001
From: ozh <ozh@ozh.org>
Date: Mon, 25 May 2015 13:07:38 +0200
Subject: [PATCH] Refactor proxy functions

Easier testing.
---
 includes/functions-deprecated.php | 13 +++++
 includes/functions-http.php       | 81 ++++++++++++++++++++-----------
 2 files changed, 65 insertions(+), 29 deletions(-)

diff --git a/includes/functions-deprecated.php b/includes/functions-deprecated.php
index a5e8429..932c927 100644
--- a/includes/functions-deprecated.php
+++ b/includes/functions-deprecated.php
@@ -75,3 +75,16 @@ function yourls_has_interface() {
 		return false;
 	return true;
 }
+
+/**
+ * Check if a proxy is defined for HTTP requests
+ *
+ * @uses YOURLS_PROXY
+ * @since 1.7
+ * @deprecated 1.7.1
+ * @return bool true if a proxy is defined, false otherwise
+ */
+function yourls_http_proxy_is_defined() {
+	yourls_deprecated_function( __FUNCTION__, '1.7.1', 'yourls_http_get_proxy' );
+	return yourls_apply_filter( 'http_proxy_is_defined', defined( 'YOURLS_PROXY' ) );
+}
diff --git a/includes/functions-http.php b/includes/functions-http.php
index 290b1ae..af2d30c 100644
--- a/includes/functions-http.php
+++ b/includes/functions-http.php
@@ -67,14 +67,37 @@ function yourls_http_post_body( $url, $headers = array(), $data = array(), $opti
 }
 
 /**
- * Check if a proxy is defined for HTTP requests
+ * Get proxy information
  *
- * @uses YOURLS_PROXY
- * @since 1.7
- * @return bool true if a proxy is defined, false otherwise
+ * @uses YOURLS_PROXY YOURLS_PROXY_USERNAME YOURLS_PROXY_PASSWORD
+ * @since 1.7.1
+ * @return mixed false if no proxy is defined, or string like '10.0.0.201:3128' or array like ('10.0.0.201:3128', 'username', 'password')
+ */
+function yourls_http_get_proxy() {
+    $proxy = false;
+    
+    if( defined( 'YOURLS_PROXY' ) && !empty( 'YOURLS_PROXY' ) ) {
+        $proxy = YOURLS_PROXY;
+        // Username (?) and password can be defined as an empty string : no check for empty()
+        if( defined( 'YOURLS_PROXY_USERNAME' ) && defined( 'YOURLS_PROXY_PASSWORD' ) ) {
+            $proxy = array( YOURLS_PROXY, YOURLS_PROXY_USERNAME, YOURLS_PROXY_PASSWORD );
+        }
+    }
+    
+    return yourls_apply_filter( 'http_get_proxy', $proxy );
+}
+
+/**
+ * Get list of hosts that should bypass the proxy
+ *
+ * @uses YOURLS_PROXY_BYPASS_HOSTS
+ * @since 1.7.1
+ * @return mixed false if no host defined, or string like "example.com, *.mycorp.com"
  */
-function yourls_http_proxy_is_defined() {
-	return yourls_apply_filter( 'http_proxy_is_defined', defined( 'YOURLS_PROXY' ) );
+function yourls_http_get_proxy_bypass_host() {
+    $hosts = defined( 'YOURLS_PROXY_BYPASS_HOSTS' ) ? YOURLS_PROXY_BYPASS_HOSTS : false;
+
+    return yourls_apply_filter( 'http_get_proxy_bypass_host', $hosts );
 }
 
 /**
@@ -82,9 +105,6 @@ function yourls_http_proxy_is_defined() {
  *
  * For a list of all available options, see function request() in /includes/Requests/Requests.php
  *
- * @uses YOURLS_PROXY
- * @uses YOURLS_PROXY_USERNAME
- * @uses YOURLS_PROXY_PASSWORD
  * @since 1.7
  * @return array Options
  */
@@ -95,13 +115,9 @@ function yourls_http_default_options() {
 		'follow_redirects' => true,
 		'redirects'        => 3,
 	);
-	
-	if( yourls_http_proxy_is_defined() ) {
-		if( defined( 'YOURLS_PROXY_USERNAME' ) && defined( 'YOURLS_PROXY_PASSWORD' ) ) {
-			$options['proxy'] = array( YOURLS_PROXY, YOURLS_PROXY_USERNAME, YOURLS_PROXY_PASSWORD );
-		} else {
-			$options['proxy'] = YOURLS_PROXY;
-		}
+
+	if( yourls_http_get_proxy() ) {
+        $options['proxy'] = yourls_http_get_proxy();
 	}
 
 	return yourls_apply_filter( 'http_default_options', $options );	
@@ -143,21 +159,28 @@ function yourls_send_through_proxy( $url ) {
 	if( in_array( $check['host'], $local ) )
 		return false;
 		
-	if ( !defined( 'YOURLS_PROXY_BYPASS_HOSTS' ) )
-		return true;
-	
-	// Check YOURLS_PROXY_BYPASS_HOSTS
+    $bypass = yourls_http_get_proxy_bypass_host();
+    
+    if( $bypass === false OR $bypass === '' ) {
+        return true;
+    }
+        
+	// Build array of hosts to bypass
 	static $bypass_hosts;
 	static $wildcard_regex = false;
 	if ( null == $bypass_hosts ) {
-			$bypass_hosts = preg_split( '|,\s*|', YOURLS_PROXY_BYPASS_HOSTS );
-
-			if ( false !== strpos( YOURLS_PROXY_BYPASS_HOSTS, '*' ) ) {
-					$wildcard_regex = array();
-					foreach ( $bypass_hosts as $host )
-							$wildcard_regex[] = str_replace( '\*', '.+', preg_quote( $host, '/' ) );
-					$wildcard_regex = '/^(' . implode( '|', $wildcard_regex ) . ')$/i';
-			}
+        $bypass_hosts = preg_split( '|\s*,\s*|', $bypass );
+
+        if ( false !== strpos( $bypass, '*' ) ) {
+            $wildcard_regex = array();
+            foreach ( $bypass_hosts as $host ) {
+                $wildcard_regex[] = str_replace( '\*', '.+', preg_quote( $host, '/' ) );
+                if ( false !== strpos( $host, '*' ) ) {
+                    $wildcard_regex[] = str_replace( '\*\.', '', preg_quote( $host, '/' ) );
+                }
+            }
+            $wildcard_regex = '/^(' . implode( '|', $wildcard_regex ) . ')$/i';
+        }
 	}
 
 	if ( !empty( $wildcard_regex ) )
@@ -182,7 +205,7 @@ function yourls_http_request( $type, $url, $headers, $data, $options ) {
 	
 	$options = array_merge( yourls_http_default_options(), $options );
 	
-	if( yourls_http_proxy_is_defined() && !yourls_send_through_proxy( $url ) )
+	if( yourls_http_get_proxy() && !yourls_send_through_proxy( $url ) )
 		unset( $options['proxy'] );
 	
 	try {
-- 
2.45.0