From bc3d93e11d501f12e25ad05d5eb2dea77f0fa0ec Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Fri, 9 Dec 2022 20:35:24 +0200
Subject: [PATCH] Add a function to close all HTTP connections

This can be useful for graceful shutdown at program exit.
---
 source/http/server.cpp | 23 +++++++++++++++++++++++
 source/http/server.h   |  2 ++
 2 files changed, 25 insertions(+)

diff --git a/source/http/server.cpp b/source/http/server.cpp
index 97a42b5..667403e 100644
--- a/source/http/server.cpp
+++ b/source/http/server.cpp
@@ -83,6 +83,29 @@ void Server::cancel_keepalive(Response &resp)
 	get_client_by_response(resp).keepalive = false;
 }
 
+void Server::close_connections(const Time::TimeDelta &timeout)
+{
+	IO::Poller poller;
+	for(list<Client>::iterator i=clients.begin(); i!=clients.end(); ++i)
+	{
+		i->sock->shutdown(IO::M_WRITE);
+		poller.set_object(*i->sock, IO::P_INPUT);
+	}
+
+	while(!clients.empty() && poller.poll(timeout))
+	{
+		const vector<IO::Poller::PolledObject> &result = poller.get_result();
+		for(vector<IO::Poller::PolledObject>::const_iterator i=result.begin(); i!=result.end(); ++i)
+			for(list<Client>::iterator j=clients.begin(); j!=clients.end(); ++j)
+				if(j->sock.get()==i->object)
+				{
+					poller.set_object(*j->sock, IO::P_NONE);
+					clients.erase(j);
+					break;
+				}
+	}
+}
+
 void Server::data_available()
 {
 	Net::StreamSocket *csock = sock.accept();
diff --git a/source/http/server.h b/source/http/server.h
index dd05420..4835de0 100644
--- a/source/http/server.h
+++ b/source/http/server.h
@@ -4,6 +4,7 @@
 #include <msp/core/refptr.h>
 #include <msp/io/eventdispatcher.h>
 #include <msp/net/streamserversocket.h>
+#include <msp/time/timedelta.h>
 
 namespace Msp {
 namespace Http {
@@ -47,6 +48,7 @@ public:
 	void delay_response(Response &);
 	void submit_response(Response &);
 	void cancel_keepalive(Response &);
+	void close_connections(const Time::TimeDelta &);
 private:
 	void data_available();
 	void client_data_available(Client &);
-- 
2.43.0