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#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>
#include <IO/CompressionMethod.h>
namespace Poco
{
class Logger;
}
namespace DB
{
/// Allows loading dictionaries from http[s] source
class HTTPDictionarySource final : public IDictionarySource
{
public:
struct Configuration
{
const std::string url;
const std::string format;
const std::string update_field;
const UInt64 update_lag;
const HTTPHeaderEntries header_entries;
};
HTTPDictionarySource(
const DictionaryStructure & dict_struct_,
const Configuration & configuration,
const Poco::Net::HTTPBasicCredentials & credentials_,
Block & sample_block_,
ContextPtr context_);
HTTPDictionarySource(const HTTPDictionarySource & other);
HTTPDictionarySource & operator=(const HTTPDictionarySource &) = delete;
QueryPipeline loadAll() override;
QueryPipeline loadUpdatedAll() override;
QueryPipeline loadIds(const std::vector<UInt64> & ids) override;
QueryPipeline 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);
// wrap buffer using encoding from made request
QueryPipeline createWrappedBuffer(std::unique_ptr<ReadWriteBufferFromHTTP> http_buffer);
Poco::Logger * log;
LocalDateTime getLastModification() const;
std::chrono::time_point<std::chrono::system_clock> update_time;
const DictionaryStructure dict_struct;
const Configuration configuration;
Poco::Net::HTTPBasicCredentials credentials;
Block sample_block;
ContextPtr context;
ConnectionTimeouts timeouts;
};
}
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