Basic HTTP pipelining support

net/http/http_pipelined_host_pool.cc

+// Copyright (c) 2011 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/http/http_pipelined_host_pool.h"
+
+#include "base/logging.h"
+#include "base/stl_util.h"
+#include "net/http/http_pipelined_host.h"
+#include "net/http/http_stream_factory_impl.h"
+
+namespace net {
+
+HttpPipelinedHostPool::HttpPipelinedHostPool(HttpStreamFactoryImpl* factory)
+    : factory_(factory) {
+}
+
+HttpPipelinedHostPool::~HttpPipelinedHostPool() {
+  CHECK(host_map_.empty());
+}
+
+HttpPipelinedStream* HttpPipelinedHostPool::CreateStreamOnNewPipeline(
+    const HostPortPair& origin,
+    ClientSocketHandle* connection,
+    const SSLConfig& used_ssl_config,
+    const ProxyInfo& used_proxy_info,
+    const BoundNetLog& net_log,
+    bool was_npn_negotiated) {
+  HttpPipelinedHost* host = GetPipelinedHost(origin, true);
+  return host->CreateStreamOnNewPipeline(connection, used_ssl_config,
+                                         used_proxy_info, net_log,
+                                         was_npn_negotiated);
+}
+
+HttpPipelinedStream* HttpPipelinedHostPool::CreateStreamOnExistingPipeline(
+    const HostPortPair& origin) {
+  HttpPipelinedHost* host = GetPipelinedHost(origin, false);
+  if (!host) {
+    return NULL;
+  }
+  return host->CreateStreamOnExistingPipeline();
+}
+
+bool HttpPipelinedHostPool::IsExistingPipelineAvailableForOrigin(
+    const HostPortPair& origin) {
+  HttpPipelinedHost* host = GetPipelinedHost(origin, false);
+  if (!host) {
+    return false;
+  }
+  return host->IsExistingPipelineAvailable();
+}
+
+HttpPipelinedHost* HttpPipelinedHostPool::GetPipelinedHost(
+    const HostPortPair& origin, bool create_if_not_found) {
+  HostMap::iterator it = host_map_.find(origin);
+  if (it != host_map_.end()) {
+    CHECK(it->second);
+    return it->second;
+  } else if (!create_if_not_found) {
+    return NULL;
+  }
+  HttpPipelinedHost* host = new HttpPipelinedHost(this, origin, NULL);
+  host_map_[origin] = host;
+  return host;
+}
+
+void HttpPipelinedHostPool::OnHostIdle(HttpPipelinedHost* host) {
+  const HostPortPair& origin = host->origin();
+  CHECK(ContainsKey(host_map_, origin));
+  // TODO(simonjam): We should remember the pipeline state for each host.
+  host_map_.erase(origin);
+  delete host;
+}
+
+void HttpPipelinedHostPool::OnHostHasAdditionalCapacity(
+    HttpPipelinedHost* host) {
+  factory_->OnHttpPipelinedHostHasAdditionalCapacity(host->origin());
+}
+
+}  // namespace net