Implement IRequestContextBase::GetPeer() for HTTP requests (#4418)

Author: Hor911

ydb/core/public_http/grpc_request_context_wrapper.cpp

@@ -77,4 +77,9 @@ namespace NKikimr::NPublicHttp {
     google::protobuf::Arena* TGrpcRequestContextWrapper::GetArena() {
         return &Arena;
     }
+
+    TString TGrpcRequestContextWrapper::GetPeer() const {
+       return RequestContext.GetPeer();
+    }
+
 } // namespace NKikimr::NPublicHttp

ydb/core/public_http/grpc_request_context_wrapper.h

@@ -46,7 +46,7 @@ class TGrpcRequestContextWrapper : public NYdbGrpc::IRequestContextBase {
     virtual void FinishStreamingOk() {}
     virtual TAsyncFinishResult GetFinishFuture() { return {}; }
     virtual bool IsClientLost() const { return false; }
-    virtual TString GetPeer() const { return {}; }
+    virtual TString GetPeer() const;
     virtual bool SslServer() const { return false; }
     virtual bool IsStreamCall() const { return false; }
 };

ydb/core/public_http/http_req.cpp

@@ -170,6 +170,10 @@ namespace NKikimr::NPublicHttp {
         return IdempotencyKey;
     }
 
+    TString THttpRequestContext::GetPeer() const {
+        return !ForwardedFor.empty() ? TString(ForwardedFor) : TString(Request->Host);
+    }
+
     void THttpRequestContext::ResponseBadRequest(Ydb::StatusIds::StatusCode status, const TString& errorText) const {
         DoResponseBadRequest(status, errorText);
     }

ydb/core/public_http/http_req.h

@@ -35,6 +35,7 @@ class THttpRequestContext {
     NHttp::THttpIncomingRequestPtr GetHttpRequest() const;
     TString GetContentType() const;
     TString GetIdempotencyKey() const;
+    TString GetPeer() const;
 
 private:
     void ParseHeaders(TStringBuf headers);