1 files changed, 163 insertions, 0 deletions
diff --git a/lib/php/src/transport/TBufferedTransport.php b/lib/php/src/transport/TBufferedTransport.php
new file mode 100644
index 000000000..cfae767ec
--- /dev/null
+++ b/lib/php/src/transport/TBufferedTransport.php
@@ -0,0 +1,163 @@
+<?php
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ *
+ * @package thrift.transport
+ */
+
+
+/**
+ * Buffered transport. Stores data to an internal buffer that it doesn't
+ * actually write out until flush is called. For reading, we do a greedy
+ * read and then serve data out of the internal buffer.
+ *
+ * @package thrift.transport
+ */
+class TBufferedTransport extends TTransport {
+
+  /**
+   * Constructor. Creates a buffered transport around an underlying transport
+   */
+  public function __construct($transport=null, $rBufSize=512, $wBufSize=512) {
+    $this->transport_ = $transport;
+    $this->rBufSize_ = $rBufSize;
+    $this->wBufSize_ = $wBufSize;
+  }
+
+  /**
+   * The underlying transport
+   *
+   * @var TTransport
+   */
+  protected $transport_ = null;
+
+  /**
+   * The receive buffer size
+   *
+   * @var int
+   */
+  protected $rBufSize_ = 512;
+
+  /**
+   * The write buffer size
+   *
+   * @var int
+   */
+  protected $wBufSize_ = 512;
+
+  /**
+   * The write buffer.
+   *
+   * @var string
+   */
+  protected $wBuf_ = '';
+
+  /**
+   * The read buffer.
+   *
+   * @var string
+   */
+  protected $rBuf_ = '';
+
+  public function isOpen() {
+    return $this->transport_->isOpen();
+  }
+
+  public function open() {
+    $this->transport_->open();
+  }
+
+  public function close() {
+    $this->transport_->close();
+  }
+
+  public function putBack($data) {
+    if (strlen($this->rBuf_) === 0) {
+      $this->rBuf_ = $data;
+    } else {
+      $this->rBuf_ = ($data . $this->rBuf_);
+    }
+  }
+
+  /**
+   * The reason that we customize readAll here is that the majority of PHP
+   * streams are already internally buffered by PHP. The socket stream, for
+   * example, buffers internally and blocks if you call read with $len greater
+   * than the amount of data available, unlike recv() in C.
+   *
+   * Therefore, use the readAll method of the wrapped transport inside
+   * the buffered readAll.
+   */
+  public function readAll($len) {
+    $have = strlen($this->rBuf_);
+    if ($have == 0) {
+      $data = $this->transport_->readAll($len);
+    } else if ($have < $len) {
+      $data = $this->rBuf_;
+      $this->rBuf_ = '';
+      $data .= $this->transport_->readAll($len - $have);
+    } else if ($have == $len) {
+      $data = $this->rBuf_;
+      $this->rBuf_ = '';
+    } else if ($have > $len) {
+      $data = substr($this->rBuf_, 0, $len);
+      $this->rBuf_ = substr($this->rBuf_, $len);
+    }
+    return $data;
+  }
+
+  public function read($len) {
+    if (strlen($this->rBuf_) === 0) {
+      $this->rBuf_ = $this->transport_->read($this->rBufSize_);
+    }
+
+    if (strlen($this->rBuf_) <= $len) {
+      $ret = $this->rBuf_;
+      $this->rBuf_ = '';
+      return $ret;
+    }
+
+    $ret = substr($this->rBuf_, 0, $len);
+    $this->rBuf_ = substr($this->rBuf_, $len);
+    return $ret;
+  }
+
+  public function write($buf) {
+    $this->wBuf_ .= $buf;
+    if (strlen($this->wBuf_) >= $this->wBufSize_) {
+      $out = $this->wBuf_;
+
+      // Note that we clear the internal wBuf_ prior to the underlying write
+      // to ensure we're in a sane state (i.e. internal buffer cleaned)
+      // if the underlying write throws up an exception
+      $this->wBuf_ = '';
+      $this->transport_->write($out);
+    }
+  }
+
+  public function flush() {
+    if (strlen($this->wBuf_) > 0) {
+      $this->transport_->write($this->wBuf_);
+      $this->wBuf_ = '';
+    }
+    $this->transport_->flush();
+  }
+
+}
+
+?>