ClickHouse/src/Dictionaries/HTTPDictionarySource.h
2020-04-09 17:29:37 +03:00

73 lines
1.9 KiB
C++

#pragma once
#include <IO/ConnectionTimeouts.h>
#include <IO/ReadWriteBufferFromHTTP.h>
#include <Poco/Net/HTTPBasicCredentials.h>
#include <Poco/URI.h>
#include <common/LocalDateTime.h>
#include "DictionaryStructure.h"
#include "IDictionarySource.h"
#include <Interpreters/Context.h>
namespace Poco
{
class Logger;
}
namespace DB
{
/// Allows loading dictionaries from http[s] source
class HTTPDictionarySource final : public IDictionarySource
{
public:
HTTPDictionarySource(
const DictionaryStructure & dict_struct_,
const Poco::Util::AbstractConfiguration & config,
const std::string & config_prefix,
Block & sample_block_,
const Context & context_,
bool check_config);
HTTPDictionarySource(const HTTPDictionarySource & other);
HTTPDictionarySource & operator=(const HTTPDictionarySource &) = delete;
BlockInputStreamPtr loadAll() override;
BlockInputStreamPtr loadUpdatedAll() override;
BlockInputStreamPtr loadIds(const std::vector<UInt64> & ids) override;
BlockInputStreamPtr loadKeys(const Columns & key_columns, const std::vector<size_t> & requested_rows) override;
bool isModified() const override;
bool supportsSelectiveLoad() const override;
bool hasUpdateField() const override;
DictionarySourcePtr clone() const override;
std::string toString() const override;
private:
void getUpdateFieldAndDate(Poco::URI & uri);
Poco::Logger * log;
LocalDateTime getLastModification() const;
std::chrono::time_point<std::chrono::system_clock> update_time;
const DictionaryStructure dict_struct;
const std::string url;
Poco::Net::HTTPBasicCredentials credentials;
ReadWriteBufferFromHTTP::HTTPHeaderEntries header_entries;
std::string update_field;
const std::string format;
Block sample_block;
Context context;
ConnectionTimeouts timeouts;
};
}