Merge pull request #378 from qiniu/fix/count-string

fix using count to get string length & header setter

Author: xwen-winnie

src/Qiniu/Auth.php

@@ -114,7 +114,7 @@ public function signQiniuAuthorization($urlString, $method = "GET", $body = "",
 
         // append body
         $data .= "\n\n";
-        if (count($body) > 0
+        if (strlen($body) > 0
             && isset($headers["Content-Type"])
             && $headers["Content-Type"] != "application/octet-stream"
         ) {

src/Qiniu/Http/Header.php

@@ -141,7 +141,7 @@ public function offsetGet($offset)
     public function offsetSet($offset, $value)
     {
         $key = self::normalizeKey($offset);
-        if (isset($this->data[$key]) && count($this->data[$key] > 0)) {
+        if (isset($this->data[$key]) && count($this->data[$key]) > 0) {
             $this->data[$key][0] = self::normalizeValue($value);
         } else {
             $this->data[$key] = array(self::normalizeValue($value));