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97 lines
3.1 KiB
C++
97 lines
3.1 KiB
C++
#include "FileDictionarySource.h"
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#include <DataStreams/OwningBlockInputStream.h>
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#include <IO/ReadBufferFromFile.h>
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#include <Interpreters/Context.h>
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#include <Poco/File.h>
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#include <Common/StringUtils/StringUtils.h>
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#include "DictionarySourceFactory.h"
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#include "DictionaryStructure.h"
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#include "registerDictionaries.h"
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#include "DictionarySourceHelpers.h"
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namespace DB
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{
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static const UInt64 max_block_size = 8192;
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namespace ErrorCodes
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{
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extern const int LOGICAL_ERROR;
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extern const int PATH_ACCESS_DENIED;
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}
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FileDictionarySource::FileDictionarySource(
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const std::string & filepath_, const std::string & format_,
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Block & sample_block_, const Context & context_, bool check_config)
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: filepath{filepath_}
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, format{format_}
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, sample_block{sample_block_}
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, context(context_)
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{
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if (check_config)
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{
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const String user_files_path = context.getUserFilesPath();
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if (!startsWith(filepath, user_files_path))
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throw Exception(ErrorCodes::PATH_ACCESS_DENIED, "File path {} is not inside {}", filepath, user_files_path);
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}
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}
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FileDictionarySource::FileDictionarySource(const FileDictionarySource & other)
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: filepath{other.filepath}
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, format{other.format}
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, sample_block{other.sample_block}
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, context(other.context)
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, last_modification{other.last_modification}
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{
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}
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BlockInputStreamPtr FileDictionarySource::loadAll()
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{
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LOG_TRACE(&Poco::Logger::get("FileDictionary"), "loadAll {}", toString());
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auto in_ptr = std::make_unique<ReadBufferFromFile>(filepath);
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auto stream = context.getInputFormat(format, *in_ptr, sample_block, max_block_size);
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last_modification = getLastModification();
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return std::make_shared<OwningBlockInputStream<ReadBuffer>>(stream, std::move(in_ptr));
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}
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std::string FileDictionarySource::toString() const
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{
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return fmt::format("File: {}, {}", filepath, format);
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}
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Poco::Timestamp FileDictionarySource::getLastModification() const
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{
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return Poco::File{filepath}.getLastModified();
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}
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void registerDictionarySourceFile(DictionarySourceFactory & factory)
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{
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auto create_table_source = [=](const DictionaryStructure & dict_struct,
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const Poco::Util::AbstractConfiguration & config,
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const std::string & config_prefix,
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Block & sample_block,
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const Context & context,
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const std::string & /* default_database */,
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bool check_config) -> DictionarySourcePtr
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{
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if (dict_struct.has_expressions)
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throw Exception{"Dictionary source of type `file` does not support attribute expressions", ErrorCodes::LOGICAL_ERROR};
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const auto filepath = config.getString(config_prefix + ".file.path");
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const auto format = config.getString(config_prefix + ".file.format");
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Context context_local_copy = copyContextAndApplySettings(config_prefix, context, config);
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return std::make_unique<FileDictionarySource>(filepath, format, sample_block, context_local_copy, check_config);
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};
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factory.registerSource("file", create_table_source);
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}
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}
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