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rocksdb/thrift/lib/cpp/transport/THttpTransport.h

111 lines
2.8 KiB

/*
* 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.
*/
#ifndef THRIFT_TRANSPORT_THTTPTRANSPORT_H_
#define THRIFT_TRANSPORT_THTTPTRANSPORT_H_ 1
#include <transport/TBufferTransports.h>
#include "TVirtualTransport.h"
namespace apache { namespace thrift { namespace transport {
/**
* HTTP implementation of the thrift transport. This was irritating
* to write, but the alternatives in C++ land are daunting. Linking CURL
* requires 23 dynamic libraries last time I checked (WTF?!?). All we have
* here is a VERY basic HTTP/1.1 client which supports HTTP 100 Continue,
* chunked transfer encoding, keepalive, etc. Tested against Apache.
*/
class THttpTransport : public TVirtualTransport<THttpTransport> {
public:
explicit THttpTransport(boost::shared_ptr<TTransport> transport);
virtual ~THttpTransport();
void open() {
transport_->open();
}
bool isOpen() {
return transport_->isOpen();
}
bool peek() {
return transport_->peek();
}
virtual void close() {
transport_->close();
}
uint32_t read(uint8_t* buf, uint32_t len);
uint32_t readEnd();
void write(const uint8_t* buf, uint32_t len);
virtual void flush() = 0;
boost::shared_ptr<TTransport> getUnderlyingTransport() {
return transport_;
}
protected:
boost::shared_ptr<TTransport> transport_;
TMemoryBuffer writeBuffer_;
TMemoryBuffer readBuffer_;
bool readHeaders_;
bool chunked_;
bool chunkedDone_;
uint32_t chunkSize_;
uint32_t contentLength_;
char* httpBuf_;
uint32_t httpPos_;
uint32_t httpBufLen_;
uint32_t httpBufSize_;
virtual void init();
uint32_t readMoreData();
char* readLine();
void readHeaders();
virtual void parseHeader(char* header) = 0;
virtual bool parseStatusLine(char* status) = 0;
uint32_t readChunked();
void readChunkedFooters();
uint32_t parseChunkSize(char* line);
uint32_t readContent(uint32_t size);
virtual void refill();
void shift();
static const char* CRLF;
static const int CRLF_LEN;
};
}}} // apache::thrift::transport
#endif // #ifndef THRIFT_TRANSPORT_THTTPCLIENT_H_