Revert of Revert "Revert of Moving gRPC support interfaces out of cronet and into a new component.

components/cronet/ios/test/quic_test_server.cc

Index: components/cronet/ios/test/quic_test_server.cc
diff --git a/components/cronet/ios/test/quic_test_server.cc b/components/cronet/ios/test/quic_test_server.cc
new file mode 100644
index 0000000000000000000000000000000000000000..5b719a984d7e6f6f435d934cdfc119a616781ed9
--- /dev/null
+++ b/components/cronet/ios/test/quic_test_server.cc
@@ -0,0 +1,136 @@
+// Copyright 2016 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 "components/cronet/ios/test/quic_test_server.h"
+
+#include <utility>
+
+#include "base/bind.h"
+#include "base/files/file_path.h"
+#include "base/files/file_util.h"
+#include "base/path_service.h"
+#include "base/synchronization/waitable_event.h"
+#include "base/threading/thread.h"
+#include "net/base/ip_address.h"
+#include "net/base/ip_endpoint.h"
+#include "net/quic/chromium/crypto/proof_source_chromium.h"
+#include "net/spdy/spdy_header_block.h"
+#include "net/test/test_data_directory.h"
+#include "net/tools/quic/quic_in_memory_cache.h"
+#include "net/tools/quic/quic_simple_server.h"
+
+namespace cronet {
+
+// This must match the certificate used (quic_test.example.com.crt and
+// quic_test.example.com.key.pkcs8).
+const char kTestServerDomain[] = "test.example.com";
+const int kTestServerPort = 6121;
+const char kTestServerHost[] = "test.example.com:6121";
+const char kTestServerUrl[] = "https://test.example.com:6121/hello.txt";
+
+const char kStatusHeader[] = ":status";
+
+const char kHelloPath[] = "/hello.txt";
+const char kHelloBodyValue[] = "Hello from QUIC Server";
+const char kHelloStatus[] = "200";
+
+const char kHelloHeaderName[] = "hello_header";
+const char kHelloHeaderValue[] = "hello header value";
+
+const char kHelloTrailerName[] = "hello_trailer";
+const char kHelloTrailerValue[] = "hello trailer value";
+
+base::Thread* g_quic_server_thread = nullptr;
+net::QuicSimpleServer* g_quic_server = nullptr;
+
+void SetupQuicInMemoryCache() {
+  static bool setup_done = false;
+  if (setup_done)
+    return;
+  setup_done = true;
+  net::SpdyHeaderBlock headers;
+  headers.AppendValueOrAddHeader(kHelloHeaderName, kHelloHeaderValue);
+  headers.AppendValueOrAddHeader(kStatusHeader, kHelloStatus);
+  net::SpdyHeaderBlock trailers;
+  trailers.AppendValueOrAddHeader(kHelloTrailerName, kHelloTrailerValue);
+  net::QuicInMemoryCache::GetInstance()->AddResponse(
+      kTestServerHost, kHelloPath, std::move(headers), kHelloBodyValue,
+      std::move(trailers));
+}
+
+void StartQuicServerOnServerThread(const base::FilePath& test_files_root,
+                                   base::WaitableEvent* server_started_event) {
+  DCHECK(g_quic_server_thread->task_runner()->BelongsToCurrentThread());
+  DCHECK(!g_quic_server);
+
+  // Set up in-memory cache.
+  SetupQuicInMemoryCache();
+  net::QuicConfig config;
+  // Set up server certs.
+  base::FilePath directory;
+  directory = test_files_root;
+  std::unique_ptr<net::ProofSourceChromium> proof_source(
+      new net::ProofSourceChromium());
+  CHECK(proof_source->Initialize(
+      directory.Append("quic_test.example.com.crt"),
+      directory.Append("quic_test.example.com.key.pkcs8"),
+      directory.Append("quic_test.example.com.key.sct")));
+  g_quic_server =
+      new net::QuicSimpleServer(std::move(proof_source), config,
+                                net::QuicCryptoServerConfig::ConfigOptions(),
+                                net::AllSupportedVersions());
+
+  // Start listening.
+  int rv = g_quic_server->Listen(
+      net::IPEndPoint(net::IPAddress::IPv4AllZeros(), kTestServerPort));
+  CHECK_GE(rv, 0) << "Quic server fails to start";
+  server_started_event->Signal();
+}
+
+void ShutdownOnServerThread(base::WaitableEvent* server_stopped_event) {
+  DCHECK(g_quic_server_thread->task_runner()->BelongsToCurrentThread());
+  g_quic_server->Shutdown();
+  delete g_quic_server;
+  g_quic_server = nullptr;
+  server_stopped_event->Signal();
+}
+
+// Quic server is currently hardcoded to run on port 6121 of the localhost on
+// the device.
+bool StartQuicTestServer() {
+  DCHECK(!g_quic_server_thread);
+  g_quic_server_thread = new base::Thread("quic server thread");
+  base::Thread::Options thread_options;
+  thread_options.message_loop_type = base::MessageLoop::TYPE_IO;
+  bool started = g_quic_server_thread->StartWithOptions(thread_options);
+  DCHECK(started);
+  base::FilePath test_files_root;
+  if (!PathService::Get(base::DIR_EXE, &test_files_root))
+    return false;
+  base::WaitableEvent server_started_event(
+      base::WaitableEvent::ResetPolicy::MANUAL,
+      base::WaitableEvent::InitialState::NOT_SIGNALED);
+  g_quic_server_thread->task_runner()->PostTask(
+      FROM_HERE, base::Bind(&StartQuicServerOnServerThread,
+                            test_files_root.Append("net/data/ssl/certificates"),
+                            &server_started_event));
+  server_started_event.Wait();
+  return true;
+}
+
+void ShutdownQuicTestServer() {
+  if (!g_quic_server_thread)
+    return;
+  DCHECK(!g_quic_server_thread->task_runner()->BelongsToCurrentThread());
+  base::WaitableEvent server_stopped_event(
+      base::WaitableEvent::ResetPolicy::MANUAL,
+      base::WaitableEvent::InitialState::NOT_SIGNALED);
+  g_quic_server_thread->task_runner()->PostTask(
+      FROM_HERE, base::Bind(&ShutdownOnServerThread, &server_stopped_event));
+  server_stopped_event.Wait();
+  delete g_quic_server_thread;
+  g_quic_server_thread = nullptr;
+}
+
+}  // namespace cronet