Do not crash on null stream in writing to bidirectional streams

net/spdy/bidirectional_stream_spdy_impl_unittest.cc

+// 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 "net/spdy/bidirectional_stream_spdy_impl.h"
+
+#include <memory>
+#include <string>
+
+#include "base/macros.h"
+#include "base/memory/ptr_util.h"
+#include "base/run_loop.h"
+#include "base/strings/string_number_conversions.h"
+#include "base/strings/string_piece.h"
+#include "base/time/time.h"
+#include "base/timer/mock_timer.h"
+#include "net/base/net_errors.h"
+#include "net/base/test_data_directory.h"
+#include "net/http/http_request_info.h"
+#include "net/http/http_response_headers.h"
+#include "net/http/http_response_info.h"
+#include "net/log/net_log.h"
+#include "net/log/test_net_log.h"
+#include "net/socket/socket_test_util.h"
+#include "net/spdy/spdy_session.h"
+#include "net/spdy/spdy_test_util_common.h"
+#include "net/test/cert_test_util.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace net {
+
+namespace {
+
+const char kBodyData[] = "Body data";
+const size_t kBodyDataSize = arraysize(kBodyData);
+// Size of the buffer to be allocated for each read.
+const size_t kReadBufferSize = 4096;
+
+// Delegate that reads data but does not send any data.
+class TestDelegateBase : public BidirectionalStreamImpl::Delegate {
+ public:
+  TestDelegateBase(base::WeakPtr<SpdySession> session,
+                   IOBuffer* read_buf,
+                   int read_buf_len)
+      : stream_(new BidirectionalStreamSpdyImpl(session)),
+        read_buf_(read_buf),
+        read_buf_len_(read_buf_len),
+        loop_(nullptr),
+        error_(OK),
+        bytes_read_(0),
+        on_data_read_count_(0),
+        on_data_sent_count_(0),
+        do_not_start_read_(false),
+        run_until_completion_(false),
+        not_expect_callback_(false),
+        on_failed_called_(false) {}
+
+  ~TestDelegateBase() override {}
+
+  void OnStreamReady(bool request_headers_sent) override {
+    CHECK(!on_failed_called_);
+  }
+
+  void OnHeadersReceived(const SpdyHeaderBlock& response_headers) override {
+    CHECK(!on_failed_called_);
+    CHECK(!not_expect_callback_);
+    response_headers_ = response_headers;
+    if (!do_not_start_read_)
+      StartOrContinueReading();
+  }
+
+  void OnDataRead(int bytes_read) override {
+    CHECK(!on_failed_called_);
+    CHECK(!not_expect_callback_);
+    on_data_read_count_++;
+    CHECK_GE(bytes_read, OK);
+    bytes_read_ += bytes_read;
+    data_received_.append(read_buf_->data(), bytes_read);
+    if (!do_not_start_read_)
+      StartOrContinueReading();
+  }
+
+  void OnDataSent() override {
+    CHECK(!on_failed_called_);
+    CHECK(!not_expect_callback_);
+    on_data_sent_count_++;
+  }
+
+  void OnTrailersReceived(const SpdyHeaderBlock& trailers) override {
+    CHECK(!on_failed_called_);
+    trailers_ = trailers;
+    if (run_until_completion_)
+      loop_->Quit();
+  }
+
+  void OnFailed(int error) override {
+    CHECK(!on_failed_called_);
+    CHECK(!not_expect_callback_);
+    CHECK_NE(OK, error);
+    error_ = error;
+    on_failed_called_ = true;
+    if (run_until_completion_)
+      loop_->Quit();
+  }
+
+  void Start(const BidirectionalStreamRequestInfo* request,
+             const BoundNetLog& net_log) {
+    stream_->Start(request, net_log,
+                   /*send_request_headers_automatically=*/false, this,
+                   base::WrapUnique(new base::Timer(false, false)));
+    not_expect_callback_ = false;
+  }
+
+  void SendData(IOBuffer* data, int length, bool end_of_stream) {
+    not_expect_callback_ = true;
+    stream_->SendData(data, length, end_of_stream);
+    not_expect_callback_ = false;
+  }
+
+  void SendvData(const std::vector<scoped_refptr<IOBuffer>>& data,
+                 const std::vector<int>& length,
+                 bool end_of_stream) {
+    not_expect_callback_ = true;
+    stream_->SendvData(data, length, end_of_stream);
+    not_expect_callback_ = false;
+  }
+
+  // Sets whether the delegate should wait until the completion of the stream.
+  void SetRunUntilCompletion(bool run_until_completion) {
+    run_until_completion_ = run_until_completion;
+    loop_.reset(new base::RunLoop);
+  }
+
+  // Starts or continues read data from |stream_| until there is no more
+  // byte can be read synchronously.
+  void StartOrContinueReading() {
+    int rv = ReadData();
+    while (rv > 0) {
+      rv = ReadData();
+    }
+    if (run_until_completion_ && rv == 0)
+      loop_->Quit();
+  }
+
+  // Calls ReadData on the |stream_| and updates internal states.
+  int ReadData() {
+    int rv = stream_->ReadData(read_buf_.get(), read_buf_len_);
+    if (rv > 0) {
+      data_received_.append(read_buf_->data(), rv);
+      bytes_read_ += rv;
+    }
+    return rv;
+  }
+
+  NextProto GetProtocol() const { return stream_->GetProtocol(); }
+
+  int64_t GetTotalReceivedBytes() const {
+    return stream_->GetTotalReceivedBytes();
+  }
+
+  int64_t GetTotalSentBytes() const { return stream_->GetTotalSentBytes(); }
+
+  // Const getters for internal states.
+  const std::string& data_received() const { return data_received_; }
+  int bytes_read() const { return bytes_read_; }
+  int error() const { return error_; }
+  const SpdyHeaderBlock response_headers() const { return response_headers_; }
+  const SpdyHeaderBlock trailers() const { return trailers_; }
+  int on_data_read_count() const { return on_data_read_count_; }
+  int on_data_sent_count() const { return on_data_sent_count_; }
+  bool on_failed_called() const { return on_failed_called_; }
+
+  // Sets whether the delegate should automatically start reading.
+  void set_do_not_start_read(bool do_not_start_read) {
+    do_not_start_read_ = do_not_start_read;
+  }
+
+  // Cancels |stream_|.
+  void CancelStream() { stream_->Cancel(); }
+
+ private:
+  std::unique_ptr<BidirectionalStreamSpdyImpl> stream_;
+  scoped_refptr<IOBuffer> read_buf_;
+  int read_buf_len_;
+  std::string data_received_;
+  std::unique_ptr<base::RunLoop> loop_;
+  SpdyHeaderBlock response_headers_;
+  SpdyHeaderBlock trailers_;
+  int error_;
+  int bytes_read_;
+  int on_data_read_count_;
+  int on_data_sent_count_;
+  bool do_not_start_read_;
+  bool run_until_completion_;
+  bool not_expect_callback_;
+  bool on_failed_called_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestDelegateBase);
+};
+
+}  // namespace
+
+class BidirectionalStreamSpdyImplTest : public testing::Test {
+ public:
+  BidirectionalStreamSpdyImplTest()
+      : spdy_util_(kProtoHTTP2, true),
+        session_deps_(kProtoHTTP2),
+        ssl_data_(SSLSocketDataProvider(ASYNC, OK)) {
+    ssl_data_.SetNextProto(kProtoHTTP2);
+    ssl_data_.cert = ImportCertFromFile(GetTestCertsDirectory(), "ok_cert.pem");
+  }
+
+ protected:
+  void TearDown() override {
+    if (sequenced_data_) {
+      EXPECT_TRUE(sequenced_data_->AllReadDataConsumed());
+      EXPECT_TRUE(sequenced_data_->AllWriteDataConsumed());
+    }
+  }
+
+  // Initializes the session using SequencedSocketData.
+  void InitSession(MockRead* reads,
+                   size_t reads_count,
+                   MockWrite* writes,
+                   size_t writes_count,
+                   const SpdySessionKey& key) {
+    ASSERT_TRUE(ssl_data_.cert.get());
+    session_deps_.socket_factory->AddSSLSocketDataProvider(&ssl_data_);
+    sequenced_data_.reset(
+        new SequencedSocketData(reads, reads_count, writes, writes_count));
+    session_deps_.socket_factory->AddSocketDataProvider(sequenced_data_.get());
+    session_deps_.net_log = net_log_.bound().net_log();
+    http_session_ = SpdySessionDependencies::SpdyCreateSession(&session_deps_);
+    session_ =
+        CreateSecureSpdySession(http_session_.get(), key, net_log_.bound());
+  }
+
+  BoundTestNetLog net_log_;
+  SpdyTestUtil spdy_util_;
+  SpdySessionDependencies session_deps_;
+  std::unique_ptr<SequencedSocketData> sequenced_data_;
+  std::unique_ptr<HttpNetworkSession> http_session_;
+  base::WeakPtr<SpdySession> session_;
+
+ private:
+  SSLSocketDataProvider ssl_data_;
+};
+
+TEST_F(BidirectionalStreamSpdyImplTest, SendDataAfterStreamFailed) {
+  std::unique_ptr<SpdySerializedFrame> req(spdy_util_.ConstructSpdyPost(
+      "https://www.example.org", 1, kBodyDataSize * 3, LOW, nullptr, 0));
+  std::unique_ptr<SpdySerializedFrame> rst(
+      spdy_util_.ConstructSpdyRstStream(1, RST_STREAM_PROTOCOL_ERROR));
+
+  MockWrite writes[] = {
+      CreateMockWrite(*req, 0), CreateMockWrite(*rst, 2),
+  };
+
+  const char* const kExtraHeaders[] = {"X-UpperCase", "yes"};
+  std::unique_ptr<SpdySerializedFrame> resp(
+      spdy_util_.ConstructSpdyGetSynReply(kExtraHeaders, 1, 1));
+
+  MockRead reads[] = {
+      CreateMockRead(*resp, 1), MockRead(ASYNC, 0, 3),
+  };
+
+  HostPortPair host_port_pair("www.example.org", 443);
+  SpdySessionKey key(host_port_pair, ProxyServer::Direct(),
+                     PRIVACY_MODE_DISABLED);
+  InitSession(reads, arraysize(reads), writes, arraysize(writes), key);
+
+  BidirectionalStreamRequestInfo request_info;
+  request_info.method = "POST";
+  request_info.url = GURL("https://www.example.org/");
+  request_info.extra_headers.SetHeader(net::HttpRequestHeaders::kContentLength,
+                                       base::SizeTToString(kBodyDataSize * 3));
+
+  scoped_refptr<IOBuffer> read_buffer(new IOBuffer(kReadBufferSize));
+  std::unique_ptr<TestDelegateBase> delegate(
+      new TestDelegateBase(session_, read_buffer.get(), kReadBufferSize));
+  delegate->SetRunUntilCompletion(true);
+  delegate->Start(&request_info, net_log_.bound());
+  base::RunLoop().RunUntilIdle();
+
+  EXPECT_TRUE(delegate->on_failed_called());
+
+  // Try to send data after OnFailed(), should not get called back.
+  scoped_refptr<StringIOBuffer> buf(new StringIOBuffer("dummy"));
+  delegate->SendData(buf.get(), buf->size(), false);
+  base::RunLoop().RunUntilIdle();
+
+  EXPECT_EQ(ERR_SPDY_PROTOCOL_ERROR, delegate->error());
+  EXPECT_EQ(0, delegate->on_data_read_count());
+  EXPECT_EQ(0, delegate->on_data_sent_count());
+  EXPECT_EQ(kProtoHTTP2, delegate->GetProtocol());
+  // BidirectionalStreamSpdyStreamJob does not count the bytes sent for |rst|
+  // because it is sent after SpdyStream::Delegate::OnClose is called.
+  EXPECT_EQ(CountWriteBytes(writes, 1), delegate->GetTotalSentBytes());
+  EXPECT_EQ(CountReadBytes(reads, arraysize(reads)),
+            delegate->GetTotalReceivedBytes());
+}
+
+TEST_F(BidirectionalStreamSpdyImplTest, SendDataAfterCancelStream) {
+  BufferedSpdyFramer framer(spdy_util_.spdy_version());
+
+  std::unique_ptr<SpdySerializedFrame> req(spdy_util_.ConstructSpdyPost(
+      "https://www.example.org", 1, kBodyDataSize * 3, LOWEST, nullptr, 0));
+  std::unique_ptr<SpdySerializedFrame> data_frame(
+      framer.CreateDataFrame(1, kBodyData, kBodyDataSize, DATA_FLAG_NONE));
+  std::unique_ptr<SpdySerializedFrame> rst(
+      spdy_util_.ConstructSpdyRstStream(1, RST_STREAM_CANCEL));
+
+  MockWrite writes[] = {
+      CreateMockWrite(*req, 0), CreateMockWrite(*data_frame, 3),
+      CreateMockWrite(*rst, 5),
+  };
+
+  std::unique_ptr<SpdySerializedFrame> resp(
+      spdy_util_.ConstructSpdyGetSynReply(nullptr, 0, 1));
+  std::unique_ptr<SpdySerializedFrame> response_body_frame(
+      spdy_util_.ConstructSpdyBodyFrame(1, false));
+
+  MockRead reads[] = {
+      CreateMockRead(*resp, 1),
+      MockRead(ASYNC, ERR_IO_PENDING, 2),  // Force a pause.
+      MockRead(ASYNC, ERR_IO_PENDING, 4),  // Force a pause.
+      MockRead(ASYNC, 0, 6),
+  };
+
+  HostPortPair host_port_pair("www.example.org", 443);
+  SpdySessionKey key(host_port_pair, ProxyServer::Direct(),
+                     PRIVACY_MODE_DISABLED);
+  InitSession(reads, arraysize(reads), writes, arraysize(writes), key);
+
+  BidirectionalStreamRequestInfo request_info;
+  request_info.method = "POST";
+  request_info.url = GURL("https://www.example.org/");
+  request_info.priority = LOWEST;
+  request_info.extra_headers.SetHeader(net::HttpRequestHeaders::kContentLength,
+                                       base::SizeTToString(kBodyDataSize * 3));
+
+  scoped_refptr<IOBuffer> read_buffer(new IOBuffer(kReadBufferSize));
+  std::unique_ptr<TestDelegateBase> delegate(
+      new TestDelegateBase(session_, read_buffer.get(), kReadBufferSize));
+  delegate->set_do_not_start_read(true);
+  delegate->Start(&request_info, net_log_.bound());
+  // Send the request and receive response headers.
+  sequenced_data_->RunUntilPaused();
+  EXPECT_EQ(kProtoHTTP2, delegate->GetProtocol());
+
+  // Send a DATA frame.
+  scoped_refptr<StringIOBuffer> buf(
+      new StringIOBuffer(std::string(kBodyData, kBodyDataSize)));
+  delegate->SendData(buf.get(), buf->size(), false);
+  sequenced_data_->Resume();
+  base::RunLoop().RunUntilIdle();
+  // Cancel the stream.
+  delegate->CancelStream();
+  sequenced_data_->Resume();
+  base::RunLoop().RunUntilIdle();
+
+  // Try to send data after Cancel(), should not get called back.
+  delegate->SendData(buf.get(), buf->size(), false);
+  base::MessageLoop::current()->RunUntilIdle();
+  EXPECT_FALSE(delegate->on_failed_called());
+
+  EXPECT_EQ("200", delegate->response_headers().find(":status")->second);
+  EXPECT_EQ(0, delegate->on_data_read_count());
+  EXPECT_EQ(kProtoHTTP2, delegate->GetProtocol());
+  EXPECT_EQ(0, delegate->GetTotalSentBytes());
+  EXPECT_EQ(0, delegate->GetTotalReceivedBytes());
+}
+
+}  // namespace net