Improve stream clear and overWrite.

Author: twose

src/PHPMemory.php

@@ -7,7 +7,7 @@
 
 namespace Swlib\Http;
 
-Class PHPMemory implements \Psr\Http\Message\StreamInterface
+Class PHPMemory implements StreamInterface
 {
 
     private $stream;
@@ -52,7 +52,7 @@
         'a+' => true
     ];
 
-    function __construct($resource = '', $mode = 'r+')
+    public function __construct($resource = '', $mode = 'r+')
     {
         switch (gettype($resource)) {
             case 'resource':
@@ -100,8 +100,7 @@ function __construct($resource = '', $mode = 'r+')
     public function __toString()
     {
         try {
-            $this->seek(0);
-
+            $this->rewind();
             return (string)stream_get_contents($this->stream);
         } catch (\Exception $e) {
             return '';
@@ -290,4 +289,20 @@ public function truncate($size = 0)
         return ftruncate($this->stream, $size);
     }
 
+    public function clear()
+    {
+        return $this->truncate(0);
+    }
+
+    public function overWrite(string $data = null)
+    {
+        if ($data === '' || $data === null) {
+            $this->clear();
+        } else {
+            $this->rewind();
+            $this->write($data);
+            $this->truncate(strlen($data));
+        }
+    }
+
 }

src/StreamInterface.php

@@ -12,6 +12,6 @@ interface StreamInterface extends \Psr\Http\Message\StreamInterface
 
     public function clear();
 
-    public function overWrite();
+    public function overWrite(string $data = null);
 
-}
+}

src/SwooleBuffer.php

@@ -48,7 +48,7 @@ public function write($data = ''): self
      *
      * @return $this
      */
-    public function overWrite(string $data = ''): self
+    public function overWrite(string $data = null): self
     {
         If ($this->writable && $data !== '') {
             $this->buffer->clear();