ClickHouse/dbms/Dictionaries/HTTPDictionarySource.cpp
Ivan 97f2a2213e
Move all folders inside /dbms one level up (#9974)
* Move some code outside dbms/src folder
* Fix paths
2020-04-02 02:51:21 +03:00

213 lines
7.7 KiB
C++

#include "HTTPDictionarySource.h"
#include <DataStreams/IBlockOutputStream.h>
#include <DataStreams/OwningBlockInputStream.h>
#include <IO/ConnectionTimeouts.h>
#include <IO/ReadWriteBufferFromHTTP.h>
#include <IO/WriteBufferFromOStream.h>
#include <IO/WriteBufferFromString.h>
#include <IO/WriteHelpers.h>
#include <Interpreters/Context.h>
#include <Poco/Net/HTTPRequest.h>
#include <common/logger_useful.h>
#include "DictionarySourceFactory.h"
#include "DictionarySourceHelpers.h"
#include "DictionaryStructure.h"
#include "registerDictionaries.h"
namespace DB
{
namespace ErrorCodes
{
extern const int LOGICAL_ERROR;
}
static const UInt64 max_block_size = 8192;
HTTPDictionarySource::HTTPDictionarySource(
const DictionaryStructure & dict_struct_,
const Poco::Util::AbstractConfiguration & config,
const std::string & config_prefix,
Block & sample_block_,
const Context & context_,
bool check_config)
: log(&Logger::get("HTTPDictionarySource"))
, update_time{std::chrono::system_clock::from_time_t(0)}
, dict_struct{dict_struct_}
, url{config.getString(config_prefix + ".url", "")}
, update_field{config.getString(config_prefix + ".update_field", "")}
, format{config.getString(config_prefix + ".format")}
, sample_block{sample_block_}
, context(context_)
, timeouts(ConnectionTimeouts::getHTTPTimeouts(context))
{
if (check_config)
context.getRemoteHostFilter().checkURL(Poco::URI(url));
const auto & credentials_prefix = config_prefix + ".credentials";
if (config.has(credentials_prefix))
{
credentials.setUsername(config.getString(credentials_prefix + ".user", ""));
credentials.setPassword(config.getString(credentials_prefix + ".password", ""));
}
const auto & headers_prefix = config_prefix + ".headers";
if (config.has(headers_prefix))
{
Poco::Util::AbstractConfiguration::Keys config_keys;
config.keys(headers_prefix, config_keys);
header_entries.reserve(config_keys.size());
for (const auto & key : config_keys)
{
const auto header_key = config.getString(headers_prefix + "." + key + ".name", "");
const auto header_value = config.getString(headers_prefix + "." + key + ".value", "");
header_entries.emplace_back(std::make_tuple(header_key, header_value));
}
}
}
HTTPDictionarySource::HTTPDictionarySource(const HTTPDictionarySource & other)
: log(&Logger::get("HTTPDictionarySource"))
, update_time{other.update_time}
, dict_struct{other.dict_struct}
, url{other.url}
, header_entries{other.header_entries}
, update_field{other.update_field}
, format{other.format}
, sample_block{other.sample_block}
, context(other.context)
, timeouts(ConnectionTimeouts::getHTTPTimeouts(context))
{
credentials.setUsername(other.credentials.getUsername());
credentials.setPassword(other.credentials.getPassword());
}
void HTTPDictionarySource::getUpdateFieldAndDate(Poco::URI & uri)
{
if (update_time != std::chrono::system_clock::from_time_t(0))
{
auto tmp_time = update_time;
update_time = std::chrono::system_clock::now();
time_t hr_time = std::chrono::system_clock::to_time_t(tmp_time) - 1;
WriteBufferFromOwnString out;
writeDateTimeText(hr_time, out);
uri.addQueryParameter(update_field, out.str());
}
else
{
update_time = std::chrono::system_clock::now();
}
}
BlockInputStreamPtr HTTPDictionarySource::loadAll()
{
LOG_TRACE(log, "loadAll " + toString());
Poco::URI uri(url);
auto in_ptr = std::make_unique<ReadWriteBufferFromHTTP>(
uri, Poco::Net::HTTPRequest::HTTP_GET, ReadWriteBufferFromHTTP::OutStreamCallback(), timeouts,
0, credentials, DBMS_DEFAULT_BUFFER_SIZE, header_entries);
auto input_stream = context.getInputFormat(format, *in_ptr, sample_block, max_block_size);
return std::make_shared<OwningBlockInputStream<ReadWriteBufferFromHTTP>>(input_stream, std::move(in_ptr));
}
BlockInputStreamPtr HTTPDictionarySource::loadUpdatedAll()
{
Poco::URI uri(url);
getUpdateFieldAndDate(uri);
LOG_TRACE(log, "loadUpdatedAll " + uri.toString());
auto in_ptr = std::make_unique<ReadWriteBufferFromHTTP>(
uri, Poco::Net::HTTPRequest::HTTP_GET, ReadWriteBufferFromHTTP::OutStreamCallback(), timeouts,
0, credentials, DBMS_DEFAULT_BUFFER_SIZE, header_entries);
auto input_stream = context.getInputFormat(format, *in_ptr, sample_block, max_block_size);
return std::make_shared<OwningBlockInputStream<ReadWriteBufferFromHTTP>>(input_stream, std::move(in_ptr));
}
BlockInputStreamPtr HTTPDictionarySource::loadIds(const std::vector<UInt64> & ids)
{
LOG_TRACE(log, "loadIds " << toString() << " size = " << ids.size());
ReadWriteBufferFromHTTP::OutStreamCallback out_stream_callback = [&](std::ostream & ostr)
{
WriteBufferFromOStream out_buffer(ostr);
auto output_stream = context.getOutputFormat(format, out_buffer, sample_block);
formatIDs(output_stream, ids);
};
Poco::URI uri(url);
auto in_ptr = std::make_unique<ReadWriteBufferFromHTTP>(
uri, Poco::Net::HTTPRequest::HTTP_POST, out_stream_callback, timeouts,
0, credentials, DBMS_DEFAULT_BUFFER_SIZE, header_entries);
auto input_stream = context.getInputFormat(format, *in_ptr, sample_block, max_block_size);
return std::make_shared<OwningBlockInputStream<ReadWriteBufferFromHTTP>>(input_stream, std::move(in_ptr));
}
BlockInputStreamPtr HTTPDictionarySource::loadKeys(const Columns & key_columns, const std::vector<size_t> & requested_rows)
{
LOG_TRACE(log, "loadKeys " << toString() << " size = " << requested_rows.size());
ReadWriteBufferFromHTTP::OutStreamCallback out_stream_callback = [&](std::ostream & ostr)
{
WriteBufferFromOStream out_buffer(ostr);
auto output_stream = context.getOutputFormat(format, out_buffer, sample_block);
formatKeys(dict_struct, output_stream, key_columns, requested_rows);
};
Poco::URI uri(url);
auto in_ptr = std::make_unique<ReadWriteBufferFromHTTP>(
uri, Poco::Net::HTTPRequest::HTTP_POST, out_stream_callback, timeouts,
0, credentials, DBMS_DEFAULT_BUFFER_SIZE, header_entries);
auto input_stream = context.getInputFormat(format, *in_ptr, sample_block, max_block_size);
return std::make_shared<OwningBlockInputStream<ReadWriteBufferFromHTTP>>(input_stream, std::move(in_ptr));
}
bool HTTPDictionarySource::isModified() const
{
return true;
}
bool HTTPDictionarySource::supportsSelectiveLoad() const
{
return true;
}
bool HTTPDictionarySource::hasUpdateField() const
{
return !update_field.empty();
}
DictionarySourcePtr HTTPDictionarySource::clone() const
{
return std::make_unique<HTTPDictionarySource>(*this);
}
std::string HTTPDictionarySource::toString() const
{
Poco::URI uri(url);
return uri.toString();
}
void registerDictionarySourceHTTP(DictionarySourceFactory & factory)
{
auto create_table_source = [=](const DictionaryStructure & dict_struct,
const Poco::Util::AbstractConfiguration & config,
const std::string & config_prefix,
Block & sample_block,
const Context & context,
bool check_config) -> DictionarySourcePtr
{
if (dict_struct.has_expressions)
throw Exception{"Dictionary source of type `http` does not support attribute expressions", ErrorCodes::LOGICAL_ERROR};
return std::make_unique<HTTPDictionarySource>(
dict_struct, config, config_prefix + ".http",
sample_block, context, check_config);
};
factory.registerSource("http", create_table_source);
}
}