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Diffstat (limited to 'vendor/packaged/thrift/src/Transport/TFramedTransport.php')
| -rw-r--r-- | vendor/packaged/thrift/src/Transport/TFramedTransport.php | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/vendor/packaged/thrift/src/Transport/TFramedTransport.php b/vendor/packaged/thrift/src/Transport/TFramedTransport.php new file mode 100644 index 000000000..39d186987 --- /dev/null +++ b/vendor/packaged/thrift/src/Transport/TFramedTransport.php @@ -0,0 +1,192 @@ +<?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\Factory\TStringFuncFactory; + +/** + * Framed transport. Writes and reads data in chunks that are stamped with + * their length. + * + * @package thrift.transport + */ +class TFramedTransport extends TTransport +{ + /** + * Underlying transport object. + * + * @var TTransport + */ + private $transport_; + + /** + * Buffer for read data. + * + * @var string + */ + private $rBuf_; + + /** + * Buffer for queued output data + * + * @var string + */ + private $wBuf_; + + /** + * Whether to frame reads + * + * @var bool + */ + private $read_; + + /** + * Whether to frame writes + * + * @var bool + */ + private $write_; + + /** + * Constructor. + * + * @param TTransport $transport Underlying transport + */ + public function __construct($transport = null, $read = true, $write = true) + { + $this->transport_ = $transport; + $this->read_ = $read; + $this->write_ = $write; + } + + public function isOpen() + { + return $this->transport_->isOpen(); + } + + public function open() + { + $this->transport_->open(); + } + + public function close() + { + $this->transport_->close(); + } + + /** + * Reads from the buffer. When more data is required reads another entire + * chunk and serves future reads out of that. + * + * @param int $len How much data + */ + public function read($len) + { + if (!$this->read_) { + return $this->transport_->read($len); + } + + if (TStringFuncFactory::create()->strlen($this->rBuf_) === 0) { + $this->readFrame(); + } + + // Just return full buff + if ($len >= TStringFuncFactory::create()->strlen($this->rBuf_)) { + $out = $this->rBuf_; + $this->rBuf_ = null; + + return $out; + } + + // Return TStringFuncFactory::create()->substr + $out = TStringFuncFactory::create()->substr($this->rBuf_, 0, $len); + $this->rBuf_ = TStringFuncFactory::create()->substr($this->rBuf_, $len); + + return $out; + } + + /** + * Put previously read data back into the buffer + * + * @param string $data data to return + */ + public function putBack($data) + { + if (TStringFuncFactory::create()->strlen($this->rBuf_) === 0) { + $this->rBuf_ = $data; + } else { + $this->rBuf_ = ($data . $this->rBuf_); + } + } + + /** + * Reads a chunk of data into the internal read buffer. + */ + private function readFrame() + { + $buf = $this->transport_->readAll(4); + $val = unpack('N', $buf); + $sz = $val[1]; + + $this->rBuf_ = $this->transport_->readAll($sz); + } + + /** + * Writes some data to the pending output buffer. + * + * @param string $buf The data + * @param int $len Limit of bytes to write + */ + public function write($buf, $len = null) + { + if (!$this->write_) { + return $this->transport_->write($buf, $len); + } + + if ($len !== null && $len < TStringFuncFactory::create()->strlen($buf)) { + $buf = TStringFuncFactory::create()->substr($buf, 0, $len); + } + $this->wBuf_ .= $buf; + } + + /** + * Writes the output buffer to the stream in the format of a 4-byte length + * followed by the actual data. + */ + public function flush() + { + if (!$this->write_ || TStringFuncFactory::create()->strlen($this->wBuf_) == 0) { + return $this->transport_->flush(); + } + + $out = pack('N', TStringFuncFactory::create()->strlen($this->wBuf_)); + $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(); + } +} |