ClickHouse/programs/odbc-bridge/IdentifierQuoteHandler.cpp
2021-03-22 12:37:05 +00:00

67 lines
1.9 KiB
C++

#include "IdentifierQuoteHandler.h"
#if USE_ODBC
#include <DataTypes/DataTypeFactory.h>
#include <Server/HTTP/HTMLForm.h>
#include <Server/HTTP/WriteBufferFromHTTPServerResponse.h>
#include <IO/WriteHelpers.h>
#include <Parsers/ParserQueryWithOutput.h>
#include <Parsers/parseQuery.h>
#include <Poco/Net/HTTPServerRequest.h>
#include <Poco/Net/HTTPServerResponse.h>
#include <common/logger_useful.h>
#include <ext/scope_guard.h>
#include "getIdentifierQuote.h"
#include "validateODBCConnectionString.h"
#include <nanodbc/nanodbc.h>
namespace DB
{
void IdentifierQuoteHandler::handleRequest(HTTPServerRequest & request, HTTPServerResponse & response)
{
HTMLForm params(request, request.getStream());
LOG_TRACE(log, "Request URI: {}", request.getURI());
auto process_error = [&response, this](const std::string & message)
{
response.setStatusAndReason(Poco::Net::HTTPResponse::HTTP_INTERNAL_SERVER_ERROR);
if (!response.sent())
*response.send() << message << std::endl;
LOG_WARNING(log, message);
};
if (!params.has("connection_string"))
{
process_error("No 'connection_string' in request URL");
return;
}
try
{
std::string connection_string = params.get("connection_string");
nanodbc::connection connection(validateODBCConnectionString(connection_string));
auto identifier = getIdentifierQuote(connection);
WriteBufferFromHTTPServerResponse out(response, request.getMethod() == Poco::Net::HTTPRequest::HTTP_HEAD, keep_alive_timeout);
try
{
writeStringBinary(identifier, out);
out.finalize();
}
catch (...)
{
out.finalize();
}
}
catch (...)
{
process_error("Error getting identifier quote style from ODBC '" + getCurrentExceptionMessage(false) + "'");
tryLogCurrentException(log);
}
}
}
#endif