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#pragma once
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#include "envoy/http/http_server_properties_cache.h"

            

        

            

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#include "envoy/server/overload/overload_manager.h"

            

        

            

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#include "source/common/http/conn_pool_base.h"

            

        

            

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namespace Envoy {

            

        

            

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namespace Http {

            

        

            

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// An HTTP connection pool which supports both HTTP/1 and HTTP/2 based on ALPN

            

        

            

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class HttpConnPoolImplMixed : public HttpConnPoolImplBase {

            

        

            

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public:

            

        

            

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  HttpConnPoolImplMixed(

            

        

            

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      Event::Dispatcher& dispatcher, Random::RandomGenerator& random_generator,

            

        

            

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      Upstream::HostConstSharedPtr host, Upstream::ResourcePriority priority,

            

        

            

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      const Network::ConnectionSocket::OptionsSharedPtr& options,

            

        

            

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      const Network::TransportSocketOptionsConstSharedPtr& transport_socket_options,

            

        

            

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      Upstream::ClusterConnectivityState& state,

            

        

            

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      absl::optional<HttpServerPropertiesCache::Origin> origin,

            

        

            

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      Http::HttpServerPropertiesCacheSharedPtr http_server_properties_cache,

            

        

            

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      Server::OverloadManager& overload_manager)

            

        

            

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      : HttpConnPoolImplBase(std::move(host), std::move(priority), dispatcher, options,

            

        

            

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                             transport_socket_options, random_generator, state,

            

        

            

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                             {Protocol::Http2, Protocol::Http11}, overload_manager),

            

        

            

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        http_server_properties_cache_(http_server_properties_cache), origin_(origin) {}

            

        

            

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  Envoy::ConnectionPool::ActiveClientPtr instantiateActiveClient() override;

            

        

            

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  CodecClientPtr createCodecClient(Upstream::Host::CreateConnectionData& data) override;

            

        

            

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  void onConnected(Envoy::ConnectionPool::ActiveClient& client) override;

            

        

            

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  Http::Protocol protocol() { return protocol_; }

            

        

            

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  absl::string_view protocolDescription() const override { return "HTTP/1 HTTP/2 ALPN"; }

            

        

            

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private:

            

        

            

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  // Default to HTTP/1, as servers which don't support ALPN are probably HTTP/1 only.

            

        

            

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  Http::Protocol protocol_ = Protocol::Http11;

            

        

            

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  Http::HttpServerPropertiesCacheSharedPtr http_server_properties_cache_;

            

        

            

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  absl::optional<HttpServerPropertiesCache::Origin> origin_;

            

        

            

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};

            

        

            

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} // namespace Http

            

        

            

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} // namespace Envoy