ClickHouse/dbms/programs/server/InterserverIOHTTPHandler.cpp

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#include <Poco/Net/HTTPServerRequest.h>
#include <Poco/Net/HTTPServerResponse.h>
#include <common/logger_useful.h>
#include <Common/HTMLForm.h>
#include <IO/CompressedWriteBuffer.h>
#include <IO/ReadBufferFromIStream.h>
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#include <IO/WriteBufferFromHTTPServerResponse.h>
#include <Interpreters/InterserverIOHandler.h>
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#include "InterserverIOHTTPHandler.h"
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namespace DB
{
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namespace ErrorCodes
{
extern const int ABORTED;
extern const int POCO_EXCEPTION;
extern const int STD_EXCEPTION;
extern const int UNKNOWN_EXCEPTION;
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extern const int TOO_MANY_SIMULTANEOUS_QUERIES;
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}
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void InterserverIOHTTPHandler::processQuery(Poco::Net::HTTPServerRequest & request, Poco::Net::HTTPServerResponse & response)
{
HTMLForm params(request);
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LOG_TRACE(log, "Request URI: " << request.getURI());
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/// NOTE: You can do authentication here if you need to.
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String endpoint_name = params.get("endpoint");
bool compress = params.get("compress") == "true";
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ReadBufferFromIStream body(request.stream());
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const auto & config = server.config();
unsigned keep_alive_timeout = config.getUInt("keep_alive_timeout", 10);
WriteBufferFromHTTPServerResponse out(request, response, keep_alive_timeout);
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auto endpoint = server.context().getInterserverIOHandler().getEndpoint(endpoint_name);
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if (compress)
{
CompressedWriteBuffer compressed_out(out);
endpoint->processQuery(params, body, compressed_out, response);
}
else
{
endpoint->processQuery(params, body, out, response);
}
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out.finalize();
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}
void InterserverIOHTTPHandler::handleRequest(Poco::Net::HTTPServerRequest & request, Poco::Net::HTTPServerResponse & response)
{
/// In order to work keep-alive.
if (request.getVersion() == Poco::Net::HTTPServerRequest::HTTP_1_1)
response.setChunkedTransferEncoding(true);
try
{
processQuery(request, response);
LOG_INFO(log, "Done processing query");
}
catch (Exception & e)
{
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if (e.code() == ErrorCodes::TOO_MANY_SIMULTANEOUS_QUERIES)
{
if (!response.sent())
response.send();
return;
}
response.setStatusAndReason(Poco::Net::HTTPResponse::HTTP_INTERNAL_SERVER_ERROR);
/// Sending to remote server was cancelled due to server shutdown or drop table.
bool is_real_error = e.code() != ErrorCodes::ABORTED;
std::string message = getCurrentExceptionMessage(is_real_error);
if (!response.sent())
response.send() << message << std::endl;
if (is_real_error)
LOG_ERROR(log, message);
else
LOG_INFO(log, message);
}
catch (...)
{
response.setStatusAndReason(Poco::Net::HTTPResponse::HTTP_INTERNAL_SERVER_ERROR);
std::string message = getCurrentExceptionMessage(false);
if (!response.sent())
response.send() << message << std::endl;
LOG_ERROR(log, message);
}
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}
}