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Diffstat (limited to 'vendor/packaged/thrift/src/Transport/TBufferedTransport.php')
| -rw-r--r-- | vendor/packaged/thrift/src/Transport/TBufferedTransport.php | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/vendor/packaged/thrift/src/Transport/TBufferedTransport.php b/vendor/packaged/thrift/src/Transport/TBufferedTransport.php new file mode 100644 index 000000000..253c5acfb --- /dev/null +++ b/vendor/packaged/thrift/src/Transport/TBufferedTransport.php @@ -0,0 +1,206 @@ +<?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\Exception\TTransportException; +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 +{ + /** + * The underlying transport + * + * @var TTransport + */ + protected $transport_; + + /** + * 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 $rBuf_ = ''; + + /** + * Constructor. Creates a buffered transport around an underlying transport + */ + public function __construct($transport, $rBufSize = 512, $wBufSize = 512) + { + $this->transport_ = $transport; + $this->rBufSize_ = $rBufSize; + $this->wBufSize_ = $wBufSize; + } + + public function isOpen() + { + return $this->transport_->isOpen(); + } + + /** + * @inheritdoc + * + * @throws TTransportException + */ + 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 $len greater + * than the amount of data available, unlike recv() in C. + * + * Therefore, use the readAll method of the wrapped transport inside + * the buffered readAll. + * + * @throws TTransportException + */ + public function readAll($len) + { + $have = TStringFuncFactory::create()->strlen($this->rBuf_); + if ($have == 0) { + $data = $this->transport_->readAll($len); + } elseif ($have < $len) { + $data = $this->rBuf_; + $this->rBuf_ = ''; + $data .= $this->transport_->readAll($len - $have); + } elseif ($have == $len) { + $data = $this->rBuf_; + $this->rBuf_ = ''; + } elseif ($have > $len) { + $data = TStringFuncFactory::create()->substr($this->rBuf_, 0, $len); + $this->rBuf_ = TStringFuncFactory::create()->substr($this->rBuf_, $len); + } + + return $data; + } + + /** + * @inheritdoc + * + * @param int $len + * @return string + * @throws TTransportException + */ + public function read($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; + } + + /** + * @inheritdoc + * + * @param string $buf + * @throws TTransportException + */ + public function write($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); + } + } + + /** + * @inheritdoc + * + * @throws TTransportException + */ + public function flush() + { + if (TStringFuncFactory::create()->strlen($this->wBuf_) > 0) { + $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); + } + $this->transport_->flush(); + } +} |