ClickHouse/dbms/include/DB/IO/ReadWriteBufferFromHTTP.h
2016-11-25 03:16:20 +03:00

45 lines
1.1 KiB
C++

#pragma once
#include <Poco/Net/HTTPClientSession.h>
#include <Poco/URI.h>
#include <DB/IO/ReadBufferFromHTTP.h>
#include <DB/IO/ReadBuffer.h>
namespace DB
{
struct HTTPTimeouts {
Poco::Timespan connection_timeout = Poco::Timespan(DEFAULT_HTTP_READ_BUFFER_CONNECTION_TIMEOUT, 0);
Poco::Timespan send_timeout = Poco::Timespan(DEFAULT_HTTP_READ_BUFFER_TIMEOUT, 0);
Poco::Timespan receive_timeout = Poco::Timespan(DEFAULT_HTTP_READ_BUFFER_TIMEOUT, 0);
};
/** Perform HTTP POST request and provide response to read.
*/
class ReadWriteBufferFromHTTP : public ReadBuffer
{
private:
Poco::URI uri;
std::string method;
HTTPTimeouts timeouts;
Poco::Net::HTTPClientSession session;
std::istream * istr; /// owned by session
std::unique_ptr<ReadBuffer> impl;
public:
using OutStreamCallback = std::function<void(std::ostream&)>;
ReadWriteBufferFromHTTP(
const Poco::URI & uri,
const std::string & method = {},
OutStreamCallback out_stream_callback = {},
size_t buffer_size_ = DBMS_DEFAULT_BUFFER_SIZE,
const HTTPTimeouts & timeouts = {}
);
bool nextImpl() override;
};
}