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#include "CatBoostLibraryBridgeHelper.h"
#include <Columns/ColumnsNumber.h>
#include <Common/escapeForFileName.h>
#include <Core/Block.h>
#include <DataTypes/DataTypesNumber.h>
#include <Formats/NativeReader.h>
#include <Formats/NativeWriter.h>
#include <IO/ReadBufferFromString.h>
#include <IO/WriteBufferFromString.h>
#include <Poco/Net/HTTPRequest.h>
#include <random>
namespace DB
{
namespace ErrorCodes
{
extern const int LOGICAL_ERROR;
}
CatBoostLibraryBridgeHelper::CatBoostLibraryBridgeHelper(
ContextPtr context_,
std::optional<String> model_path_,
std::optional<String> library_path_)
: LibraryBridgeHelper(context_->getGlobalContext())
, model_path(model_path_)
, library_path(library_path_)
{
}
Poco::URI CatBoostLibraryBridgeHelper::getPingURI() const
{
auto uri = createBaseURI();
uri.setPath(PING_HANDLER);
return uri;
}
Poco::URI CatBoostLibraryBridgeHelper::getMainURI() const
{
auto uri = createBaseURI();
uri.setPath(MAIN_HANDLER);
return uri;
}
Poco::URI CatBoostLibraryBridgeHelper::createRequestURI(const String & method) const
{
auto uri = getMainURI();
uri.addQueryParameter("version", std::to_string(LIBRARY_BRIDGE_PROTOCOL_VERSION));
uri.addQueryParameter("method", method);
return uri;
}
bool CatBoostLibraryBridgeHelper::bridgeHandShake()
{
String result;
try
{
ReadWriteBufferFromHTTP buf(getPingURI(), Poco::Net::HTTPRequest::HTTP_GET, {}, http_timeouts, credentials);
readString(result, buf);
}
catch (...)
{
tryLogCurrentException(log);
return false;
}
if (result != "1")
throw Exception(ErrorCodes::LOGICAL_ERROR,
"Unexpected message from library bridge: {}. "
"Check that bridge and server have the same version.", result);
return true;
}
ExternalModelInfos CatBoostLibraryBridgeHelper::listModels()
{
startBridgeSync();
ReadWriteBufferFromHTTP buf(
createRequestURI(CATBOOST_LIST_METHOD),
Poco::Net::HTTPRequest::HTTP_POST,
[](std::ostream &) {},
http_timeouts, credentials);
ExternalModelInfos result;
UInt64 num_rows;
readIntBinary(num_rows, buf);
for (UInt64 i = 0; i < num_rows; ++i)
{
ExternalModelInfo info;
readStringBinary(info.model_path, buf);
readStringBinary(info.model_type, buf);
UInt64 t;
readIntBinary(t, buf);
info.loading_start_time = std::chrono::system_clock::from_time_t(t);
readIntBinary(t, buf);
info.loading_duration = std::chrono::milliseconds(t);
result.push_back(info);
}
return result;
}
void CatBoostLibraryBridgeHelper::removeModel()
{
startBridgeSync();
assert(model_path);
ReadWriteBufferFromHTTP buf(
createRequestURI(CATBOOST_REMOVEMODEL_METHOD),
Poco::Net::HTTPRequest::HTTP_POST,
[this](std::ostream & os)
{
os << "model_path=" << escapeForFileName(*model_path);
},
http_timeouts, credentials);
String result;
readStringBinary(result, buf);
assert(result == "1");
}
void CatBoostLibraryBridgeHelper::removeAllModels()
{
startBridgeSync();
ReadWriteBufferFromHTTP buf(
createRequestURI(CATBOOST_REMOVEALLMODELS_METHOD),
Poco::Net::HTTPRequest::HTTP_POST,
[](std::ostream &){},
http_timeouts, credentials);
String result;
readStringBinary(result, buf);
assert(result == "1");
}
size_t CatBoostLibraryBridgeHelper::getTreeCount()
{
startBridgeSync();
assert(model_path && library_path);
ReadWriteBufferFromHTTP buf(
createRequestURI(CATBOOST_GETTREECOUNT_METHOD),
Poco::Net::HTTPRequest::HTTP_POST,
[this](std::ostream & os)
{
os << "library_path=" << escapeForFileName(*library_path) << "&";
os << "model_path=" << escapeForFileName(*model_path);
},
http_timeouts, credentials);
size_t result;
readIntBinary(result, buf);
return result;
}
ColumnPtr CatBoostLibraryBridgeHelper::evaluate(const ColumnsWithTypeAndName & columns)
{
startBridgeSync();
WriteBufferFromOwnString string_write_buf;
Block block(columns);
NativeWriter serializer(string_write_buf, /*client_revision*/ 0, block);
serializer.write(block);
assert(model_path);
ReadWriteBufferFromHTTP buf(
createRequestURI(CATBOOST_LIB_EVALUATE_METHOD),
Poco::Net::HTTPRequest::HTTP_POST,
[this, serialized = string_write_buf.str()](std::ostream & os)
{
os << "model_path=" << escapeForFileName(*model_path) << "&";
os << "data=" << escapeForFileName(serialized);
},
http_timeouts, credentials);
NativeReader deserializer(buf, /*server_revision*/ 0);
Block block_read = deserializer.read();
return block_read.getColumns()[0];
}
}
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