diff --git a/wchat/common/HttpClient.php b/wchat/common/HttpClient.php
index 3aea124..a62671e 100644
--- a/wchat/common/HttpClient.php
+++ b/wchat/common/HttpClient.php
@@ -332,31 +332,31 @@ class HttpClient
 	 * @return bool|string
 	 * @throws Exception
 	 */
-	private function matchHost($_string= '')
+	private function matchHost($_string = '')
 	{
 		if (empty($_string)) {
 			return false;
 		}
 
 		if ($this->isHttp($_string)) {
-			$_= str_replace('http://', '', $_string);
+			$_ = str_replace('http://', '', $_string);
 			$hostAndUrls = explode('/', $_string);
 
 			$this->host = array_shift($hostAndUrls);
-			$_= implode('/', $hostAndUrls);
+			$_ = implode('/', $hostAndUrls);
 		} else if ($this->isHttps($_string)) {
-			$_= str_replace('https://', '', $_string);
+			$_ = str_replace('https://', '', $_string);
 			$this->setIsSSL(true);
 
 			$hostAndUrls = explode('/', $_string);
 
 			$this->host = array_shift($hostAndUrls);
-			$_= implode('/', $hostAndUrls);
+			$_ = implode('/', $hostAndUrls);
 		} else if (empty($this->host)) {
 			$hostAndUrls = explode('/', $_string);
 			$this->host = array_shift($hostAndUrls);
 
-			$_= implode('/', $hostAndUrls);
+			$_ = implode('/', $hostAndUrls);
 		}
 
 		if (strpos($this->host, ':') !== false) {
@@ -692,7 +692,9 @@ class HttpClient
 		}
 		if ($this->method === self::POST) {
 			curl_setopt($ch, CURLOPT_POST, 1);
-			curl_setopt($ch, CURLOPT_POSTFIELDS, $this->mergeParams($data));
+			if (!is_string($data)) {
+				curl_setopt($ch, CURLOPT_POSTFIELDS, $this->mergeParams($data));
+			}
 		}
 
 		$output = curl_exec($ch);