| <?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 |
| */ |
| |
| namespace Thrift\Transport; |
| |
| use Thrift\Transport\TTransport; |
| use Thrift\Factory\TStringFuncFactory; |
| |
| /** |
| * 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 (TStringFuncFactory::create()->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) { |
| $have = TStringFuncFactory::create()->strlen($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) { |
| $data = TStringFuncFactory::create()->substr($this->rBuf_, 0, $len); |
| $this->rBuf_ = TStringFuncFactory::create()->substr($this->rBuf_, $len); |
| } |
| return $data; |
| } |
| |
| public function read($len) { |
| if (TStringFuncFactory::create()->strlen($this->rBuf_) === 0) { |
| $this->rBuf_ = $this->transport_->read($this->rBufSize_); |
| } |
| |
| if (TStringFuncFactory::create()->strlen($this->rBuf_) <= $len) { |
| $ret = $this->rBuf_; |
| $this->rBuf_ = ''; |
| return $ret; |
| } |
| |
| $ret = TStringFuncFactory::create()->substr($this->rBuf_, 0, $len); |
| $this->rBuf_ = TStringFuncFactory::create()->substr($this->rBuf_, $len); |
| return $ret; |
| } |
| |
| public function write($buf) { |
| $this->wBuf_ .= $buf; |
| if (TStringFuncFactory::create()->strlen($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 (TStringFuncFactory::create()->strlen($this->wBuf_) > 0) { |
| $this->transport_->write($this->wBuf_); |
| $this->wBuf_ = ''; |
| } |
| $this->transport_->flush(); |
| } |
| |
| } |