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#pragma once
#include <base/types.h>
#include <mutex>
#include <Common/ProxyConfigurationResolver.h>
#include <Poco/URI.h>
namespace DB
{
/*
* Makes an HTTP GET request to the specified endpoint to obtain a proxy host.
* */
class RemoteProxyConfigurationResolver : public ProxyConfigurationResolver
{
public:
RemoteProxyConfigurationResolver(
const Poco::URI & endpoint_,
String proxy_protocol_,
unsigned proxy_port_,
unsigned cache_ttl_
);
ProxyConfiguration resolve() override;
void errorReport(const ProxyConfiguration & config) override;
private:
/// Endpoint to obtain a proxy host.
const Poco::URI endpoint;
/// Scheme for obtained proxy.
const String proxy_protocol;
/// Port for obtained proxy.
const unsigned proxy_port;
std::mutex cache_mutex;
bool cache_valid = false;
std::chrono::time_point<std::chrono::system_clock> cache_timestamp;
const std::chrono::seconds cache_ttl{0};
ProxyConfiguration cached_config;
};
}
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