Index: wp-admin/includes/update.php
===================================================================
--- wp-admin/includes/update.php	(revision 6350)
+++ wp-admin/includes/update.php	(working copy)
@@ -40,11 +40,12 @@
 }
 add_action( 'admin_notices', 'update_nag', 3 );
 
-function wp_update_plugins() {
+function wp_update_plugins_user_agent($useragent) {
 	global $wp_version;
+	return 'User-Agent: WordPress/' . $wp_version . '; ' . get_bloginfo('url') . "\r\n"
+}
 
-	if ( !function_exists('fsockopen') )
-		return false;
+function wp_update_plugins() {
 
 	$plugins = get_plugins();
 	$active  = get_option( 'active_plugins' );
@@ -77,26 +78,23 @@
 	$to_send->active = $active;
 	$send = serialize( $to_send );
 
+	add_filter('http_headers_useragent', 'wp_update_plugins_user_agent', 1);
+
 	$request = 'plugins=' . urlencode( $send );
-	$http_request  = "POST /plugins/update-check/1.0/ HTTP/1.0\r\n";
-	$http_request .= "Host: api.wordpress.org\r\n";
 	$http_request .= "Content-Type: application/x-www-form-urlencoded; charset=" . get_option('blog_charset') . "\r\n";
 	$http_request .= "Content-Length: " . strlen($request) . "\r\n";
-	$http_request .= 'User-Agent: WordPress/' . $wp_version . '; ' . get_bloginfo('url') . "\r\n";
-	$http_request .= "\r\n";
-	$http_request .= $request;
 
-	$response = '';
-	if( false != ( $fs = @fsockopen( 'api.wordpress.org', 80, $errno, $errstr, 3) ) && is_resource($fs) ) {
-		fwrite($fs, $http_request);
+	$objResponse = wp_remote_post_object('api.wordpress.org/plugins/update-check/1.0/', $http_request, $request);
 
-		while ( !feof($fs) )
-			$response .= fgets($fs, 1160); // One TCP-IP packet
-		fclose($fs);
-		$response = explode("\r\n\r\n", $response, 2);
+	remove_filter('http_headers_useragent', 'wp_update_plugins_user_agent', 1);
+
+	if( true === $objResponse->hasError() ) {
+		unset($objResponse);
+		return;
 	}
 
-	$response = unserialize( $response[1] );
+	$body = $objResponse->getBody();
+	$response = unserialize( $body );
 
 	if ( $response )
 		$new_option->response = $response;
Index: wp-admin/update-links.php
===================================================================
--- wp-admin/update-links.php	(revision 6350)
+++ wp-admin/update-links.php	(working copy)
@@ -1,6 +1,5 @@
 <?php
 require_once('../wp-config.php');
-require_once( ABSPATH . 'wp-includes/class-snoopy.php');
 
 if ( !get_option('use_linksupdate') )
 	wp_die(__('Feature disabled.'));
@@ -14,31 +13,21 @@
 
 $query_string = "uris=$link_uris";
 
-$http_request  = "POST /updated-batch/ HTTP/1.0\r\n";
-$http_request .= "Host: api.pingomatic.com\r\n";
 $http_request .= 'Content-Type: application/x-www-form-urlencoded; charset='.get_option('blog_charset')."\r\n";
 $http_request .= 'Content-Length: ' . strlen($query_string) . "\r\n";
-$http_request .= 'User-Agent: WordPress/' . $wp_version . "\r\n";
-$http_request .= "\r\n";
-$http_request .= $query_string;
 
-$response = '';
-if ( false !== ( $fs = @fsockopen('api.pingomatic.com', 80, $errno, $errstr, 5) ) ) {
-	fwrite($fs, $http_request);
-	while ( !feof($fs) )
-		$response .= fgets($fs, 1160); // One TCP-IP packet
-	fclose($fs);
+$objResponse = wp_remote_post_object('http://api.pingomatic.org/updated-batch/', $http_request, $query_string);
 
-	$response = explode("\r\n\r\n", $response, 2);
-	$body = trim( $response[1] );
-	$body = str_replace(array("\r\n", "\r"), "\n", $body);
+if( true === $objResponse->hasError() ) {
+	wp_die(__('No Connection Established'));
+}
 
-	$returns = explode("\n", $body);
+$body = trim( $objResponse->getBody() );
+$returns = explode("\n", $body);
 
-	foreach ($returns as $return) :
-		$time = $wpdb->escape( substr($return, 0, 19) );
-		$uri = $wpdb->escape( preg_replace('/(.*?) | (.*?)/', '$2', $return) );
-		$wpdb->query("UPDATE $wpdb->links SET link_updated = '$time' WHERE link_url = '$uri'");
-	endforeach;
-}
-?>
+foreach ($returns as $return) :
+	$time = $wpdb->escape( substr($return, 0, 19) );
+	$uri = $wpdb->escape( preg_replace('/(.*?) | (.*?)/', '$2', $return) );
+	$wpdb->query("UPDATE $wpdb->links SET link_updated = '$time' WHERE link_url = '$uri'");
+endforeach;
+?>
\ No newline at end of file
Index: wp-includes/comment.php
===================================================================
--- wp-includes/comment.php	(revision 6350)
+++ wp-includes/comment.php	(working copy)
@@ -532,73 +532,42 @@
 	$headers = '';
 	$pingback_str_dquote = 'rel="pingback"';
 	$pingback_str_squote = 'rel=\'pingback\'';
-	$x_pingback_str = 'x-pingback: ';
+	$x_pingback_str = 'x-pingback';
 	$pingback_href_original_pos = 27;
 
-	extract(parse_url($url), EXTR_SKIP);
+	$objResponse = wp_remote_get_object($url, null, null, 2);
+	
+	$x_pingback_header = $objResponse->getHeaders($x_pingback_str);
+	if( false === $x_pingback_header )
+		foreach($objResponse->getHeaders() as $name => $value) {
+			if( 0 == strcasecmp($x_pingback_str, $name) )
+				$x_pingback_header = $value;
 
-	if ( !isset($host) ) // Not an URL. This should never happen.
-		return false;
+	$content_type = trim($objResponse->getHeaders('Content-type'));
 
-	$path  = ( !isset($path) ) ? '/'          : $path;
-	$path .= ( isset($query) ) ? '?' . $query : '';
-	$port  = ( isset($port)  ) ? $port        : 80;
-
-	// Try to connect to the server at $host
-	$fp = @fsockopen($host, $port, $errno, $errstr, 2);
-	if ( !$fp ) // Couldn't open a connection to $host
+	if ( preg_match('#(image|audio|video|model)/#is', $content_type) ) // Not an (x)html, sgml, or xml page, no use going further
 		return false;
 
-	// Send the GET request
-	$request = "GET $path HTTP/1.1\r\nHost: $host\r\nUser-Agent: WordPress/$wp_version \r\n\r\n";
-	// ob_end_flush();
-	fputs($fp, $request);
-
-	// Let's check for an X-Pingback header first
-	while ( !feof($fp) ) {
-		$line = fgets($fp, 512);
-		if ( trim($line) == '' )
-			break;
-		$headers .= trim($line)."\n";
-		$x_pingback_header_offset = strpos(strtolower($headers), $x_pingback_str);
-		if ( $x_pingback_header_offset ) {
-			// We got it!
-			preg_match('#x-pingback: (.+)#is', $headers, $matches);
-			$pingback_server_url = trim($matches[1]);
+	$contents .= trim($objResponse->getBody());
+	$pingback_link_offset_dquote = strpos($contents, $pingback_str_dquote);
+	$pingback_link_offset_squote = strpos($contents, $pingback_str_squote);
+	if ( $pingback_link_offset_dquote || $pingback_link_offset_squote ) {
+		$quote = ($pingback_link_offset_dquote) ? '"' : '\'';
+		$pingback_link_offset = ($quote=='"') ? $pingback_link_offset_dquote : $pingback_link_offset_squote;
+		$pingback_href_pos = @strpos($contents, 'href=', $pingback_link_offset);
+		$pingback_href_start = $pingback_href_pos+6;
+		$pingback_href_end = @strpos($contents, $quote, $pingback_href_start);
+		$pingback_server_url_len = $pingback_href_end - $pingback_href_start;
+		$pingback_server_url = substr($contents, $pingback_href_start, $pingback_server_url_len);
+		// We may find rel="pingback" but an incomplete pingback URL
+		if ( $pingback_server_url_len > 0 ) // We got it!
 			return $pingback_server_url;
-		}
-		if ( strpos(strtolower($headers), 'content-type: ') ) {
-			preg_match('#content-type: (.+)#is', $headers, $matches);
-			$content_type = trim($matches[1]);
-		}
 	}
-
-	if ( preg_match('#(image|audio|video|model)/#is', $content_type) ) // Not an (x)html, sgml, or xml page, no use going further
+	$byte_count += strlen($line);
+	if ( $byte_count > $timeout_bytes ) {
+		// It's no use going further, there probably isn't any pingback
+		// server to find in this file. (Prevents loading large files.)
 		return false;
-
-	while ( !feof($fp) ) {
-		$line = fgets($fp, 1024);
-		$contents .= trim($line);
-		$pingback_link_offset_dquote = strpos($contents, $pingback_str_dquote);
-		$pingback_link_offset_squote = strpos($contents, $pingback_str_squote);
-		if ( $pingback_link_offset_dquote || $pingback_link_offset_squote ) {
-			$quote = ($pingback_link_offset_dquote) ? '"' : '\'';
-			$pingback_link_offset = ($quote=='"') ? $pingback_link_offset_dquote : $pingback_link_offset_squote;
-			$pingback_href_pos = @strpos($contents, 'href=', $pingback_link_offset);
-			$pingback_href_start = $pingback_href_pos+6;
-			$pingback_href_end = @strpos($contents, $quote, $pingback_href_start);
-			$pingback_server_url_len = $pingback_href_end - $pingback_href_start;
-			$pingback_server_url = substr($contents, $pingback_href_start, $pingback_server_url_len);
-			// We may find rel="pingback" but an incomplete pingback URL
-			if ( $pingback_server_url_len > 0 ) // We got it!
-				return $pingback_server_url;
-		}
-		$byte_count += strlen($line);
-		if ( $byte_count > $timeout_bytes ) {
-			// It's no use going further, there probably isn't any pingback
-			// server to find in this file. (Prevents loading large files.)
-			return false;
-		}
 	}
 
 	// We didn't find anything.
@@ -764,7 +733,7 @@
 
 	if ( empty($trackback_url) )
 		return;
-
+st);
 	$title = urlencode($title);
 	$excerpt = urlencode($excerpt);
 	$blog_name = urlencode(get_option('blogname'));
@@ -772,6 +741,8 @@
 	$url = urlencode(get_permalink($ID));
 	$query_string = "title=$title&url=$url&blog_name=$blog_name&excerpt=$excerpt";
 	$trackback_url = parse_url($trackback_url);
+	
+	
 	$http_request = 'POST ' . $trackback_url['path'] . ($trackback_url['query'] ? '?'.$trackback_url['query'] : '') . " HTTP/1.0\r\n";
 	$http_request .= 'Host: '.$trackback_url['host']."\r\n";
 	$http_request .= 'Content-Type: application/x-www-form-urlencoded; charset='.get_option('blog_charset')."\r\n";
@@ -782,7 +753,7 @@
 	if ( '' == $trackback_url['port'] )
 		$trackback_url['port'] = 80;
 	$fs = @fsockopen($trackback_url['host'], $trackback_url['port'], $errno, $errstr, 4);
-	@fputs($fs, $http_request);
+	@fputs($fs, $http_reque
 	@fclose($fs);
 
 	$tb_url = addslashes( $tb_url );
Index: wp-includes/cron.php
===================================================================
--- wp-includes/cron.php	(revision 6350)
+++ wp-includes/cron.php	(working copy)
@@ -82,26 +82,8 @@
 		return;
 
 	$cron_url = get_option( 'siteurl' ) . '/wp-cron.php';
-	$parts = parse_url( $cron_url );
 
-	if ($parts['scheme'] == 'https') {
-		// support for SSL was added in 4.3.0
-		if (version_compare(phpversion(), '4.3.0', '>=') && function_exists('openssl_open')) {
-			$port = isset($parts['port']) ? $parts['port'] : 443;
-			$argyle = @fsockopen('ssl://' . $parts['host'], $port, $errno, $errstr, 0.01);
-		} else {
-			return false;
-		}
-	} else {
-		$port = isset($parts['port']) ? $parts['port'] : 80;
-		$argyle = @ fsockopen( $parts['host'], $port, $errno, $errstr, 0.01 );
-	}
-
-	if ( $argyle )
-		fputs( $argyle,
-			  "GET {$parts['path']}?check=" . wp_hash('187425') . " HTTP/1.0\r\n"
-			. "Host: {$_SERVER['HTTP_HOST']}\r\n\r\n"
-		);
+	wp_remote_post_object($cron_url.'?check='.wp_hash('187425'), null, null, 0.2);
 }
 
 function wp_cron() {
Index: wp-includes/functions.php
===================================================================
--- wp-includes/functions.php	(revision 6350)
+++ wp-includes/functions.php	(working copy)
@@ -533,46 +533,20 @@
 	}
 }
 
-
-function wp_get_http_headers( $url, $red = 1 ) {
-	global $wp_version;
-	@set_time_limit( 60 );
-
-	if ( $red > 5 )
-		 return false;
-
-	$parts = parse_url( $url );
-	$file = $parts['path'] . ( ( $parts['query'] ) ? '?' . $parts['query'] : '' );
-	$host = $parts['host'];
-	if ( !isset( $parts['port'] ) )
-		$parts['port'] = 80;
-
-	$head = "HEAD $file HTTP/1.1\r\nHOST: $host\r\nUser-Agent: WordPress/" . $wp_version . "\r\n\r\n";
-
-	$fp = @fsockopen( $host, $parts['port'], $err_num, $err_msg, 3 );
-	if ( !$fp )
-		return false;
-
-	$response = '';
-	fputs( $fp, $head );
-	while ( !feof( $fp ) && strpos( $response, "\r\n\r\n" ) == false )
-		$response .= fgets( $fp, 2048 );
-	fclose( $fp );
-	preg_match_all( '/(.*?): (.*)\r/', $response, $matches );
-	$count = count( $matches[1] );
-	for ( $i = 0; $i < $count; $i++ ) {
-		$key = strtolower( $matches[1][$i] );
-		$headers["$key"] = $matches[2][$i];
-	}
-
-	preg_match( '/.*([0-9]{3}).*/', $response, $return );
-	$headers['response'] = $return[1]; // HTTP response code eg 204, 200, 404
-
-		$code = $headers['response'];
-		if ( ( '302' == $code || '301' == $code ) && isset( $headers['location'] ) )
-				return wp_get_http_headers( $headers['location'], ++$red );
-
-	return $headers;
+/**
+ * Returns only the headers from the URL
+ *
+ * @package WordPress
+ * @since 1.5.1
+ * @uses wp_remote_get_head() Is alias of wp_remote_get_head()
+ * @deprecated Use wp_remote_get_head() instead.
+ *
+ * @param string $url The URL to retrieve the headers from.
+ * @param int $deprecated Deprecated. Not used any more.
+ * @returns array Each header has key/value pair with key as the header name.
+ */
+function wp_get_http_headers( $url, $deprecated = 1 ) {
+	return wp_remote_get_head($url);
 }
 
 
@@ -699,39 +673,19 @@
 	return $array;
 }
 
+/**
+ * Returns only the body from the URL
+ *
+ * @package WordPress
+ * @since 1.5.1
+ * @uses wp_remote_get_body() Is alias of wp_remote_get_body()
+ * @deprecated Use wp_remote_get_body() instead.
+ *
+ * @param string $url The URL to retrieve the headers from.
+ * @returns string The body of hte response
+ */
 function wp_remote_fopen( $uri ) {
-	$timeout = 10;
-	$parsed_url = @parse_url( $uri );
-
-	if ( !$parsed_url || !is_array( $parsed_url ) )
-		return false;
-
-	if ( !isset( $parsed_url['scheme'] ) || !in_array( $parsed_url['scheme'], array( 'http','https' ) ) )
-		$uri = 'http://' . $uri;
-
-	if ( ini_get( 'allow_url_fopen' ) ) {
-		$fp = @fopen( $uri, 'r' );
-		if ( !$fp )
-			return false;
-
-		//stream_set_timeout($fp, $timeout); // Requires php 4.3
-		$linea = '';
-		while ( $remote_read = fread( $fp, 4096 ) )
-			$linea .= $remote_read;
-		fclose( $fp );
-		return $linea;
-	} elseif ( function_exists( 'curl_init' ) ) {
-		$handle = curl_init();
-		curl_setopt( $handle, CURLOPT_URL, $uri);
-		curl_setopt( $handle, CURLOPT_CONNECTTIMEOUT, 1 );
-		curl_setopt( $handle, CURLOPT_RETURNTRANSFER, 1 );
-		curl_setopt( $handle, CURLOPT_TIMEOUT, $timeout );
-		$buffer = curl_exec( $handle );
-		curl_close( $handle );
-		return $buffer;
-	} else {
-		return false;
-	}
+	return wp_remote_get_body($uri, null, null, 10);
 }
 
 
Index: wp-includes/update.php
===================================================================
--- wp-includes/update.php	(revision 6350)
+++ wp-includes/update.php	(working copy)
@@ -7,10 +7,10 @@
  */
 
 /**
- * wp_version_check() - Check WordPress version against the newest version.
+ * Check WordPress version against the newest version.
  *
  * The WordPress version, PHP version, and Locale is sent. Checks against the WordPress server at 
- * api.wordpress.org server. Will only check if PHP has fsockopen enabled and WordPress isn't installing.
+ * api.wordpress.org server. Will only check if WordPress isn't installing.
  *
  * @package WordPress
  * @since 2.3
@@ -19,7 +19,7 @@
  * @return mixed Returns null if update is unsupported. Returns false if check is too soon.
  */
 function wp_version_check() {
-	if ( !function_exists('fsockopen') || strpos($_SERVER['PHP_SELF'], 'install.php') !== false || defined('WP_INSTALLING') )
+	if ( strpos($_SERVER['PHP_SELF'], 'install.php') !== false || defined('WP_INSTALLING') )
 		return;
 
 	global $wp_version;
@@ -36,35 +36,40 @@
 		return false;
 
 	$new_option = '';
-	$new_option->last_checked = time(); // this gets set whether we get a response or not, so if something is down or misconfigured it won't delay the page load for more than 3 seconds, twice a day
+	// this gets set whether we get a response or not, so if something is down or misconfigured it won't delay the page load for more than 3 seconds, twice a day
+	$new_option->last_checked = time(); 
 	$new_option->version_checked = $wp_version;
 
-	$http_request  = "GET /core/version-check/1.0/?version=$wp_version&php=$php_version&locale=$locale HTTP/1.0\r\n";
-	$http_request .= "Host: api.wordpress.org\r\n";
 	$http_request .= 'Content-Type: application/x-www-form-urlencoded; charset=' . get_option('blog_charset') . "\r\n";
-	$http_request .= 'User-Agent: WordPress/' . $wp_version . '; ' . get_bloginfo('url') . "\r\n";
-	$http_request .= "\r\n";
 
-	$response = '';
-	if ( false !== ( $fs = @fsockopen( 'api.wordpress.org', 80, $errno, $errstr, 3 ) ) && is_resource($fs) ) {
-		fwrite( $fs, $http_request );
-		while ( !feof( $fs ) )
-			$response .= fgets( $fs, 1160 ); // One TCP-IP packet
-		fclose( $fs );
+	add_filter('http_headers_useragent', 'wp_version_check_useragent', 1);
+	$body = wp_remote_get_body('http://api.wordpress.org/core/version-check/1.0/?version=$wp_version&php=$php_version&locale=$locale', $http_request, null, 3);
+	remove_filter('http_headers_useragent', 'wp_version_check_useragent', 1);
 
-		$response = explode("\r\n\r\n", $response, 2);
-		$body = trim( $response[1] );
-		$body = str_replace(array("\r\n", "\r"), "\n", $body);
+	$returns = explode("\n", trim($body) );
 
-		$returns = explode("\n", $body);
+	$new_option->response = $returns[0];
+	if ( isset( $returns[1] ) )
+		$new_option->url = $returns[1];
 
-		$new_option->response = $returns[0];
-		if ( isset( $returns[1] ) )
-			$new_option->url = $returns[1];
-	}
 	update_option( 'update_core', $new_option );
 }
 
+/**
+ * Changes filter for the wp_version_check useragent
+ *
+ * @package WordPress
+ * @since Unknown
+ * @uses $wp_version Used to check against the newest WordPress version.
+ *
+ * @param string $useragent Ignores passed useragent
+ * @return string Bypasses string and returns new user agent.
+ */
+function wp_version_check_useragent($useragent) {
+	global $wp_version;
+	return 'User-Agent: WordPress/' . $wp_version . '; ' . get_bloginfo('url') . "\r\n";
+}
+
 add_action( 'init', 'wp_version_check' );
 
 ?>
\ No newline at end of file
Index: wp-settings.php
===================================================================
--- wp-settings.php	(revision 6350)
+++ wp-settings.php	(working copy)
@@ -119,6 +119,7 @@
 require (ABSPATH . WPINC . '/compat.php');
 require (ABSPATH . WPINC . '/functions.php');
 require (ABSPATH . WPINC . '/classes.php');
+require (ABSPATH . WPINC . '/http.php');
 
 require_wp_db();
 $prefix = $wpdb->set_prefix($table_prefix);