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/**
* Copyright (C) 2023-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#pragma once
#include <string>
#include <grpcpp/grpcpp.h>
#include "mongo/transport/grpc/metadata.h"
#include "mongo/transport/grpc/server_context.h"
namespace mongo::transport::grpc {
class GRPCServerContext : public ServerContext {
public:
/**
* Parses a gRPC-formatted URI to a HostAndPort, throwing an exception on failure.
* See: https://grpc.github.io/grpc/cpp/md_doc_naming.html
*/
static HostAndPort parseURI(const std::string& uri) {
StringData sd{uri};
if (auto firstColon = sd.find(':'); firstColon != std::string::npos) {
sd = sd.substr(firstColon + 1);
}
return HostAndPort::parseThrowing(sd);
}
explicit GRPCServerContext(::grpc::ServerContext* ctx)
: _ctx{ctx}, _remote{parseURI(_ctx->peer())} {
for (auto& kvp : _ctx->client_metadata()) {
_clientMetadata.insert({StringData{kvp.first.data(), kvp.first.length()},
StringData{kvp.second.data(), kvp.second.length()}});
}
}
~GRPCServerContext() = default;
void addInitialMetadataEntry(const std::string& key, const std::string& value) override {
_ctx->AddInitialMetadata(key, value);
}
const MetadataView& getClientMetadata() const override {
return _clientMetadata;
}
Date_t getDeadline() const override {
return Date_t{_ctx->deadline()};
}
HostAndPort getRemote() const override {
return _remote;
}
bool isCancelled() const override {
return _ctx->IsCancelled();
}
void tryCancel() override {
_ctx->TryCancel();
}
private:
::grpc::ServerContext* _ctx;
MetadataView _clientMetadata;
HostAndPort _remote;
};
} // namespace mongo::transport::grpc
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