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108 lines
3.6 KiB
C++
108 lines
3.6 KiB
C++
#include <Dictionaries/HTTPDictionarySource.h>
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#include <Poco/Net/HTTPRequest.h>
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#include <Interpreters/Context.h>
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#include <DataStreams/OwningBlockInputStream.h>
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#include <IO/ReadWriteBufferFromHTTP.h>
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#include <DataStreams/IBlockOutputStream.h>
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#include <DataTypes/DataTypesNumber.h>
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#include <IO/WriteBufferFromOStream.h>
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#include <Dictionaries/DictionarySourceHelpers.h>
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#include <common/logger_useful.h>
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namespace DB
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{
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static const size_t max_block_size = 8192;
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HTTPDictionarySource::HTTPDictionarySource(const DictionaryStructure & dict_struct_,
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const Poco::Util::AbstractConfiguration & config, const std::string & config_prefix,
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Block & sample_block, const Context & context)
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: log(&Logger::get("HTTPDictionarySource")),
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dict_struct{dict_struct_},
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url{config.getString(config_prefix + ".url", "")},
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format{config.getString(config_prefix + ".format")},
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sample_block{sample_block},
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context(context)
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{
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}
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HTTPDictionarySource::HTTPDictionarySource(const HTTPDictionarySource & other)
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: log(&Logger::get("HTTPDictionarySource")),
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dict_struct{other.dict_struct},
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url{other.url},
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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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{
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}
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BlockInputStreamPtr HTTPDictionarySource::loadAll()
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{
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LOG_TRACE(log, "loadAll " + toString());
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Poco::URI uri(url);
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auto in_ptr = std::make_unique<ReadWriteBufferFromHTTP>(uri, Poco::Net::HTTPRequest::HTTP_GET);
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auto input_stream = context.getInputFormat(format, *in_ptr, sample_block, max_block_size);
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return std::make_shared<OwningBlockInputStream<ReadWriteBufferFromHTTP>>(input_stream, std::move(in_ptr));
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}
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BlockInputStreamPtr HTTPDictionarySource::loadIds(const std::vector<UInt64> & ids)
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{
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LOG_TRACE(log, "loadIds " << toString() << " size = " << ids.size());
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ReadWriteBufferFromHTTP::OutStreamCallback out_stream_callback = [&](std::ostream & ostr)
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{
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WriteBufferFromOStream out_buffer(ostr);
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auto output_stream = context.getOutputFormat(format, out_buffer, sample_block);
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formatIDs(output_stream, ids);
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};
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Poco::URI uri(url);
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auto in_ptr = std::make_unique<ReadWriteBufferFromHTTP>(uri, Poco::Net::HTTPRequest::HTTP_POST, out_stream_callback);
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auto input_stream = context.getInputFormat(format, *in_ptr, sample_block, max_block_size);
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return std::make_shared<OwningBlockInputStream<ReadWriteBufferFromHTTP>>(input_stream, std::move(in_ptr));
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}
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BlockInputStreamPtr HTTPDictionarySource::loadKeys(
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const Columns & key_columns, const std::vector<std::size_t> & requested_rows)
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{
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LOG_TRACE(log, "loadKeys " << toString() << " size = " << requested_rows.size());
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ReadWriteBufferFromHTTP::OutStreamCallback out_stream_callback = [&](std::ostream & ostr)
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{
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WriteBufferFromOStream out_buffer(ostr);
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auto output_stream = context.getOutputFormat(format, out_buffer, sample_block);
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formatKeys(dict_struct, output_stream, key_columns, requested_rows);
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};
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Poco::URI uri(url);
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auto in_ptr = std::make_unique<ReadWriteBufferFromHTTP>(uri, Poco::Net::HTTPRequest::HTTP_POST, out_stream_callback);
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auto input_stream = context.getInputFormat(format, *in_ptr, sample_block, max_block_size);
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return std::make_shared<OwningBlockInputStream<ReadWriteBufferFromHTTP>>(input_stream, std::move(in_ptr));
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}
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bool HTTPDictionarySource::isModified() const
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{
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return true;
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}
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bool HTTPDictionarySource::supportsSelectiveLoad() const
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{
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return true;
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}
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DictionarySourcePtr HTTPDictionarySource::clone() const
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{
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return std::make_unique<HTTPDictionarySource>(*this);
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}
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std::string HTTPDictionarySource::toString() const
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{
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Poco::URI uri(url);
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return uri.toString();
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}
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}
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