Close idle connections / SPDY sessions when needed

net/spdy/spdy_session_spdy2_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/spdy/spdy_session.h"
 
 #include "net/base/host_cache.h"
 #include "net/base/ip_endpoint.h"
 #include "net/base/net_log_unittest.h"
 #include "net/spdy/spdy_io_buffer.h"
@@ skipping 1049 matching lines @@
       net::NetLog::TYPE_SPDY_SESSION_CLOSE,
       net::NetLog::PHASE_NONE);
 
   CapturingNetLog::Entry entry = entries[pos];
   NetLogSpdySessionCloseParameter* request_params =
       static_cast<NetLogSpdySessionCloseParameter*>(
           entry.extra_parameters.get());
   EXPECT_EQ(ERR_CONNECTION_CLOSED, request_params->status());
 }
 
+TEST_F(SpdySessionSpdy2Test, CloseOneIdleConnection) {
+  MockHostResolver host_resolver;
+  CapturingBoundNetLog log(CapturingNetLog::kUnbounded);
+  ClientSocketPoolHistograms tcp_histograms("");
+  MockClientSocketFactory socket_factory;
+  MockConnect connect_data(SYNCHRONOUS, OK);
+  MockRead reads[] = {
+    MockRead(SYNCHRONOUS, ERR_IO_PENDING)  // Stall forever.
+  };
+  StaticSocketDataProvider data(reads, arraysize(reads), NULL, 0);
+  data.set_connect_data(connect_data);
+  socket_factory.AddSocketDataProvider(&data);
+  socket_factory.AddSocketDataProvider(&data);
+  socket_factory.AddSocketDataProvider(&data);
+  socket_factory.AddSocketDataProvider(&data);
+  socket_factory.AddSocketDataProvider(&data);
+  socket_factory.AddSocketDataProvider(&data);
+  TransportClientSocketPool pool(
+      3, 2,
+      &tcp_histograms,
+      &host_resolver,
+      &socket_factory, NULL);
+  // Now if I check out 1 socket from 3 different groups, the next request
+  // will leave us stalled.
+
+  TestCompletionCallback callback1;
+  HostPortPair host_port1("1.com", 80);
+  scoped_refptr<TransportSocketParams> params1(
+      new TransportSocketParams(host_port1, MEDIUM, false, false));
+  scoped_ptr<ClientSocketHandle> connection1(new ClientSocketHandle);
+  EXPECT_EQ(ERR_IO_PENDING,
+            connection1->Init(host_port1.ToString(), params1, MEDIUM,
+                              callback1.callback(), &pool, log.bound()));
+  EXPECT_EQ(OK, callback1.WaitForResult());
+  EXPECT_FALSE(pool.IsStalled());
+  EXPECT_TRUE(connection1->is_initialized());
+  EXPECT_TRUE(connection1->socket());
+
+  TestCompletionCallback callback2;
+  HostPortPair host_port2("2.com", 80);
+  scoped_refptr<TransportSocketParams> params2(
+      new TransportSocketParams(host_port2, MEDIUM, false, false));
+  scoped_ptr<ClientSocketHandle> connection2(new ClientSocketHandle);
+  EXPECT_EQ(ERR_IO_PENDING,
+            connection2->Init(host_port2.ToString(), params2, MEDIUM,
+                              callback2.callback(), &pool, log.bound()));
+  EXPECT_EQ(OK, callback2.WaitForResult());
+  EXPECT_FALSE(pool.IsStalled());
+
+  TestCompletionCallback callback3;
+  HostPortPair host_port3("3.com", 80);
+  scoped_refptr<TransportSocketParams> params3(
+      new TransportSocketParams(host_port3, MEDIUM, false, false));
+  scoped_ptr<ClientSocketHandle> connection3(new ClientSocketHandle);
+  EXPECT_EQ(ERR_IO_PENDING,
+            connection3->Init(host_port3.ToString(), params3, MEDIUM,
+                              callback3.callback(), &pool, log.bound()));
+  EXPECT_EQ(OK, callback3.WaitForResult());
+  EXPECT_FALSE(pool.IsStalled());
+
+  TestCompletionCallback callback4;
+  HostPortPair host_port4("4.com", 80);
+  scoped_refptr<TransportSocketParams> params4(
+      new TransportSocketParams(host_port4, MEDIUM, false, false));
+  scoped_ptr<ClientSocketHandle> connection4(new ClientSocketHandle);
+  EXPECT_EQ(ERR_IO_PENDING,
+            connection4->Init(host_port4.ToString(), params4, MEDIUM,
+                              callback4.callback(), &pool, log.bound()));
+  EXPECT_TRUE(pool.IsStalled());
+
+  // Return 1 socket to the pool so that we are no longer stalled
+  connection3->socket()->Disconnect();
+  connection3->Reset();
+  EXPECT_EQ(OK, callback4.WaitForResult());
+  EXPECT_FALSE(pool.IsStalled());
+
+  // Now, wrap one of the sockets in a SpdySession
+  HttpServerPropertiesImpl props;
+  SpdySessionPool spdy_session_pool(&host_resolver, NULL, &props);
+  HostPortProxyPair pair1(host_port1, ProxyServer::Direct());
+  EXPECT_FALSE(spdy_session_pool.HasSession(pair1));
+  scoped_refptr<SpdySession> session1 =
+      spdy_session_pool.Get(pair1, log.bound());
+  EXPECT_TRUE(spdy_session_pool.HasSession(pair1));
+  EXPECT_EQ(OK,
+            session1->InitializeWithSocket(connection1.release(), false, OK));
+  session1 = NULL;
+  EXPECT_TRUE(spdy_session_pool.HasSession(pair1));
+
+  // The SpdySession is now idle.  When we request the next socket from the
+  // transport pool, the session will be closed via CloseOneIdleConnection().
+  TestCompletionCallback callback5;
+  HostPortPair host_port5("5.com", 80);
+  scoped_refptr<TransportSocketParams> params5(
+      new TransportSocketParams(host_port5, MEDIUM, false, false));
+  scoped_ptr<ClientSocketHandle> connection5(new ClientSocketHandle);
+  EXPECT_EQ(ERR_IO_PENDING,
+            connection5->Init(host_port5.ToString(), params5, MEDIUM,
+                              callback5.callback(), &pool, log.bound()));
+  EXPECT_FALSE(pool.IsStalled());
+  EXPECT_EQ(OK, callback5.WaitForResult());
+  EXPECT_FALSE(spdy_session_pool.HasSession(pair1));
+  EXPECT_FALSE(pool.IsStalled());
+
+  // Now, wrap one of the sockets in a SpdySession
+  HostPortProxyPair pair2(host_port2, ProxyServer::Direct());
+  EXPECT_FALSE(spdy_session_pool.HasSession(pair2));
+  scoped_refptr<SpdySession> session2 =
+      spdy_session_pool.Get(pair2, log.bound());
+  EXPECT_TRUE(spdy_session_pool.HasSession(pair2));
+  EXPECT_EQ(OK,
+            session2->InitializeWithSocket(connection2.release(), false, OK));
+
+  // Manually remove the socket from the pool.  This does *not* return the
+  // transport socket.  It will be returned only when the SpdySession is
+  // destructed.
+  session2->RemoveFromPool();
+  EXPECT_FALSE(spdy_session_pool.HasSession(pair2));
+
+  // Although there are no active streams on the session, the pool does not
+  // hold a reference.  This means that CloseOneIdleConnection should not
+  // return true, and this request should stall.
+  TestCompletionCallback callback6;
+  HostPortPair host_port6("6.com", 80);
+  scoped_refptr<TransportSocketParams> params6(
+      new TransportSocketParams(host_port5, MEDIUM, false, false));
+  scoped_ptr<ClientSocketHandle> connection6(new ClientSocketHandle);
+  EXPECT_EQ(ERR_IO_PENDING,
+            connection6->Init(host_port6.ToString(), params6, MEDIUM,
+                              callback6.callback(), &pool, log.bound()));
+  EXPECT_TRUE(pool.IsStalled());
+
+  // But now if we drop our reference to the session, it will be destructed
+  // and the transport socket will return to the pool, unblocking this
+  // request.
+  session2 = NULL;
+  EXPECT_EQ(OK, callback6.WaitForResult());
+  EXPECT_FALSE(pool.IsStalled());
+}
+
 }  // namespace net