// Copyright 2013 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/websockets/websocket_stream.h"

#include <algorithm>
#include <string>
#include <utility>
#include <vector>

#include "base/memory/scoped_vector.h"
#include "base/run_loop.h"
#include "base/strings/stringprintf.h"
#include "net/base/net_errors.h"
#include "net/http/http_request_headers.h"
#include "net/http/http_response_headers.h"
#include "net/socket/client_socket_handle.h"
#include "net/socket/socket_test_util.h"
#include "net/url_request/url_request_test_util.h"
#include "net/websockets/websocket_basic_handshake_stream.h"
#include "net/websockets/websocket_frame.h"
#include "net/websockets/websocket_handshake_request_info.h"
#include "net/websockets/websocket_handshake_response_info.h"
#include "net/websockets/websocket_handshake_stream_create_helper.h"
#include "net/websockets/websocket_test_util.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "url/gurl.h"

namespace net {
namespace {

typedef std::pair<std::string, std::string> HeaderKeyValuePair;

std::vector<HeaderKeyValuePair> ToVector(const HttpRequestHeaders& headers) {
  HttpRequestHeaders::Iterator it(headers);
  std::vector<HeaderKeyValuePair> result;
  while (it.GetNext())
    result.push_back(HeaderKeyValuePair(it.name(), it.value()));
  return result;
}

std::vector<HeaderKeyValuePair> ToVector(const HttpResponseHeaders& headers) {
  void* iter = NULL;
  std::string name, value;
  std::vector<HeaderKeyValuePair> result;
  while (headers.EnumerateHeaderLines(&iter, &name, &value))
    result.push_back(HeaderKeyValuePair(name, value));
  return result;
}

// A sub-class of WebSocketHandshakeStreamCreateHelper which always sets a
// deterministic key to use in the WebSocket handshake.
class DeterministicKeyWebSocketHandshakeStreamCreateHelper
    : public WebSocketHandshakeStreamCreateHelper {
 public:
  DeterministicKeyWebSocketHandshakeStreamCreateHelper(
      WebSocketStream::ConnectDelegate* connect_delegate,
      const std::vector<std::string>& requested_subprotocols)
      : WebSocketHandshakeStreamCreateHelper(connect_delegate,
                                             requested_subprotocols) {}

  virtual WebSocketHandshakeStreamBase* CreateBasicStream(
      scoped_ptr<ClientSocketHandle> connection,
      bool using_proxy) OVERRIDE {
    WebSocketHandshakeStreamCreateHelper::CreateBasicStream(connection.Pass(),
                                                            using_proxy);
    // This will break in an obvious way if the type created by
    // CreateBasicStream() changes.
    static_cast<WebSocketBasicHandshakeStream*>(stream())
        ->SetWebSocketKeyForTesting("dGhlIHNhbXBsZSBub25jZQ==");
    return stream();
  }
};

class WebSocketStreamCreateTest : public ::testing::Test {
 protected:
  WebSocketStreamCreateTest(): has_failed_(false) {}

  void CreateAndConnectCustomResponse(
      const std::string& socket_url,
      const std::string& socket_path,
      const std::vector<std::string>& sub_protocols,
      const std::string& origin,
      const std::string& extra_request_headers,
      const std::string& response_body) {
    url_request_context_host_.SetExpectations(
        WebSocketStandardRequest(socket_path, origin, extra_request_headers),
        response_body);
    CreateAndConnectStream(socket_url, sub_protocols, origin);
  }

  // |extra_request_headers| and |extra_response_headers| must end in "\r\n" or
  // errors like "Unable to perform synchronous IO while stopped" will occur.
  void CreateAndConnectStandard(const std::string& socket_url,
                                const std::string& socket_path,
                                const std::vector<std::string>& sub_protocols,
                                const std::string& origin,
                                const std::string& extra_request_headers,
                                const std::string& extra_response_headers) {
    CreateAndConnectCustomResponse(
        socket_url,
        socket_path,
        sub_protocols,
        origin,
        extra_request_headers,
        WebSocketStandardResponse(extra_response_headers));
  }

  void CreateAndConnectRawExpectations(
      const std::string& socket_url,
      const std::vector<std::string>& sub_protocols,
      const std::string& origin,
      scoped_ptr<DeterministicSocketData> socket_data) {
    url_request_context_host_.SetRawExpectations(socket_data.Pass());
    CreateAndConnectStream(socket_url, sub_protocols, origin);
  }

  // A wrapper for CreateAndConnectStreamForTesting that knows about our default
  // parameters.
  void CreateAndConnectStream(const std::string& socket_url,
                              const std::vector<std::string>& sub_protocols,
                              const std::string& origin) {
    scoped_ptr<WebSocketStream::ConnectDelegate> connect_delegate(
        new TestConnectDelegate(this));
    WebSocketStream::ConnectDelegate* delegate = connect_delegate.get();
    stream_request_ = ::net::CreateAndConnectStreamForTesting(
        GURL(socket_url),
        scoped_ptr<WebSocketHandshakeStreamCreateHelper>(
            new DeterministicKeyWebSocketHandshakeStreamCreateHelper(
                delegate, sub_protocols)),
        GURL(origin),
        url_request_context_host_.GetURLRequestContext(),
        BoundNetLog(),
        connect_delegate.Pass());
  }

  static void RunUntilIdle() { base::RunLoop().RunUntilIdle(); }

  // A simple function to make the tests more readable. Creates an empty vector.
  static std::vector<std::string> NoSubProtocols() {
    return std::vector<std::string>();
  }

  const std::string& failure_message() const { return failure_message_; }
  bool has_failed() const { return has_failed_; }

  class TestConnectDelegate : public WebSocketStream::ConnectDelegate {
   public:
    explicit TestConnectDelegate(WebSocketStreamCreateTest* owner)
        : owner_(owner) {}

    virtual void OnSuccess(scoped_ptr<WebSocketStream> stream) OVERRIDE {
      stream.swap(owner_->stream_);
    }

    virtual void OnFailure(const std::string& message) OVERRIDE {
      owner_->has_failed_ = true;
      owner_->failure_message_ = message;
    }

    virtual void OnStartOpeningHandshake(
        scoped_ptr<WebSocketHandshakeRequestInfo> request) OVERRIDE {
      if (owner_->request_info_)
        ADD_FAILURE();
      owner_->request_info_ = request.Pass();
    }
    virtual void OnFinishOpeningHandshake(
        scoped_ptr<WebSocketHandshakeResponseInfo> response) OVERRIDE {
      if (owner_->response_info_)
        ADD_FAILURE();
      owner_->response_info_ = response.Pass();
    }

   private:
    WebSocketStreamCreateTest* owner_;
  };

  WebSocketTestURLRequestContextHost url_request_context_host_;
  scoped_ptr<WebSocketStreamRequest> stream_request_;
  // Only set if the connection succeeded.
  scoped_ptr<WebSocketStream> stream_;
  // Only set if the connection failed.
  std::string failure_message_;
  bool has_failed_;
  scoped_ptr<WebSocketHandshakeRequestInfo> request_info_;
  scoped_ptr<WebSocketHandshakeResponseInfo> response_info_;
};

// There are enough tests of the Sec-WebSocket-Extensions header that they
// deserve their own test fixture.
class WebSocketStreamCreateExtensionTest : public WebSocketStreamCreateTest {
 public:
  // Performs a standard connect, with the value of the Sec-WebSocket-Extensions
  // header in the response set to |extensions_header_value|. Runs the event
  // loop to allow the connect to complete.
  void CreateAndConnectWithExtensions(
      const std::string& extensions_header_value) {
    CreateAndConnectStandard(
        "ws://localhost/testing_path",
        "/testing_path",
        NoSubProtocols(),
        "http://localhost/",
        "",
        "Sec-WebSocket-Extensions: " + extensions_header_value + "\r\n");
    RunUntilIdle();
  }
};

// Confirm that the basic case works as expected.
TEST_F(WebSocketStreamCreateTest, SimpleSuccess) {
  CreateAndConnectStandard(
      "ws://localhost/", "/", NoSubProtocols(), "http://localhost/", "", "");
  EXPECT_FALSE(request_info_);
  EXPECT_FALSE(response_info_);
  RunUntilIdle();
  EXPECT_FALSE(has_failed());
  EXPECT_TRUE(stream_);
  EXPECT_TRUE(request_info_);
  EXPECT_TRUE(response_info_);
}

TEST_F(WebSocketStreamCreateTest, HandshakeInfo) {
  static const char kResponse[] =
      "HTTP/1.1 101 Switching Protocols\r\n"
      "Upgrade: websocket\r\n"
      "Connection: Upgrade\r\n"
      "Sec-WebSocket-Accept: s3pPLMBiTxaQ9kYGzzhZRbK+xOo=\r\n"
      "foo: bar, baz\r\n"
      "hoge: fuga\r\n"
      "hoge: piyo\r\n"
      "\r\n";

  CreateAndConnectCustomResponse(
      "ws://localhost/",
      "/",
      NoSubProtocols(),
      "http://localhost/",
      "",
      kResponse);
  EXPECT_FALSE(request_info_);
  EXPECT_FALSE(response_info_);
  RunUntilIdle();
  EXPECT_TRUE(stream_);
  ASSERT_TRUE(request_info_);
  ASSERT_TRUE(response_info_);
  std::vector<HeaderKeyValuePair> request_headers =
      ToVector(request_info_->headers);
  // We examine the contents of request_info_ and response_info_
  // mainly only in this test case.
  EXPECT_EQ(GURL("ws://localhost/"), request_info_->url);
  EXPECT_EQ(GURL("ws://localhost/"), response_info_->url);
  EXPECT_EQ(101, response_info_->status_code);
  EXPECT_EQ("Switching Protocols", response_info_->status_text);
  ASSERT_EQ(12u, request_headers.size());
  EXPECT_EQ(HeaderKeyValuePair("Host", "localhost"), request_headers[0]);
  EXPECT_EQ(HeaderKeyValuePair("Connection", "Upgrade"), request_headers[1]);
  EXPECT_EQ(HeaderKeyValuePair("Pragma", "no-cache"), request_headers[2]);
  EXPECT_EQ(HeaderKeyValuePair("Cache-Control", "no-cache"),
            request_headers[3]);
  EXPECT_EQ(HeaderKeyValuePair("Upgrade", "websocket"), request_headers[4]);
  EXPECT_EQ(HeaderKeyValuePair("Origin", "http://localhost/"),
            request_headers[5]);
  EXPECT_EQ(HeaderKeyValuePair("Sec-WebSocket-Version", "13"),
            request_headers[6]);
  EXPECT_EQ(HeaderKeyValuePair("User-Agent", ""), request_headers[7]);
  EXPECT_EQ(HeaderKeyValuePair("Accept-Encoding", "gzip,deflate"),
            request_headers[8]);
  EXPECT_EQ(HeaderKeyValuePair("Accept-Language", "en-us,fr"),
            request_headers[9]);
  EXPECT_EQ("Sec-WebSocket-Key",  request_headers[10].first);
  EXPECT_EQ(HeaderKeyValuePair("Sec-WebSocket-Extensions",
                               "permessage-deflate; client_max_window_bits"),
            request_headers[11]);

  std::vector<HeaderKeyValuePair> response_headers =
      ToVector(*response_info_->headers);
  ASSERT_EQ(6u, response_headers.size());
  // Sort the headers for ease of verification.
  std::sort(response_headers.begin(), response_headers.end());

  EXPECT_EQ(HeaderKeyValuePair("Connection", "Upgrade"), response_headers[0]);
  EXPECT_EQ("Sec-WebSocket-Accept", response_headers[1].first);
  EXPECT_EQ(HeaderKeyValuePair("Upgrade", "websocket"), response_headers[2]);
  EXPECT_EQ(HeaderKeyValuePair("foo", "bar, baz"), response_headers[3]);
  EXPECT_EQ(HeaderKeyValuePair("hoge", "fuga"), response_headers[4]);
  EXPECT_EQ(HeaderKeyValuePair("hoge", "piyo"), response_headers[5]);
}

// Confirm that the stream isn't established until the message loop runs.
TEST_F(WebSocketStreamCreateTest, NeedsToRunLoop) {
  CreateAndConnectStandard(
      "ws://localhost/", "/", NoSubProtocols(), "http://localhost/", "", "");
  EXPECT_FALSE(has_failed());
  EXPECT_FALSE(stream_);
}

// Check the path is used.
TEST_F(WebSocketStreamCreateTest, PathIsUsed) {
  CreateAndConnectStandard("ws://localhost/testing_path",
                           "/testing_path",
                           NoSubProtocols(),
                           "http://localhost/",
                           "",
                           "");
  RunUntilIdle();
  EXPECT_FALSE(has_failed());
  EXPECT_TRUE(stream_);
}

// Check that the origin is used.
TEST_F(WebSocketStreamCreateTest, OriginIsUsed) {
  CreateAndConnectStandard("ws://localhost/testing_path",
                           "/testing_path",
                           NoSubProtocols(),
                           "http://google.com/",
                           "",
                           "");
  RunUntilIdle();
  EXPECT_FALSE(has_failed());
  EXPECT_TRUE(stream_);
}

// Check that sub-protocols are sent and parsed.
TEST_F(WebSocketStreamCreateTest, SubProtocolIsUsed) {
  std::vector<std::string> sub_protocols;
  sub_protocols.push_back("chatv11.chromium.org");
  sub_protocols.push_back("chatv20.chromium.org");
  CreateAndConnectStandard("ws://localhost/testing_path",
                           "/testing_path",
                           sub_protocols,
                           "http://google.com/",
                           "Sec-WebSocket-Protocol: chatv11.chromium.org, "
                           "chatv20.chromium.org\r\n",
                           "Sec-WebSocket-Protocol: chatv20.chromium.org\r\n");
  RunUntilIdle();
  EXPECT_TRUE(stream_);
  EXPECT_FALSE(has_failed());
  EXPECT_EQ("chatv20.chromium.org", stream_->GetSubProtocol());
}

// Unsolicited sub-protocols are rejected.
TEST_F(WebSocketStreamCreateTest, UnsolicitedSubProtocol) {
  CreateAndConnectStandard("ws://localhost/testing_path",
                           "/testing_path",
                           NoSubProtocols(),
                           "http://google.com/",
                           "",
                           "Sec-WebSocket-Protocol: chatv20.chromium.org\r\n");
  RunUntilIdle();
  EXPECT_FALSE(stream_);
  EXPECT_TRUE(has_failed());
  EXPECT_EQ("Error during WebSocket handshake: "
            "Response must not include 'Sec-WebSocket-Protocol' header "
            "if not present in request: chatv20.chromium.org",
            failure_message());
}

// Missing sub-protocol response is rejected.
TEST_F(WebSocketStreamCreateTest, UnacceptedSubProtocol) {
  std::vector<std::string> sub_protocols;
  sub_protocols.push_back("chat.example.com");
  CreateAndConnectStandard("ws://localhost/testing_path",
                           "/testing_path",
                           sub_protocols,
                           "http://localhost/",
                           "Sec-WebSocket-Protocol: chat.example.com\r\n",
                           "");
  RunUntilIdle();
  EXPECT_FALSE(stream_);
  EXPECT_TRUE(has_failed());
  EXPECT_EQ("Error during WebSocket handshake: "
            "Sent non-empty 'Sec-WebSocket-Protocol' header "
            "but no response was received",
            failure_message());
}

// Only one sub-protocol can be accepted.
TEST_F(WebSocketStreamCreateTest, MultipleSubProtocolsInResponse) {
  std::vector<std::string> sub_protocols;
  sub_protocols.push_back("chatv11.chromium.org");
  sub_protocols.push_back("chatv20.chromium.org");
  CreateAndConnectStandard("ws://localhost/testing_path",
                           "/testing_path",
                           sub_protocols,
                           "http://google.com/",
                           "Sec-WebSocket-Protocol: chatv11.chromium.org, "
                           "chatv20.chromium.org\r\n",
                           "Sec-WebSocket-Protocol: chatv11.chromium.org, "
                           "chatv20.chromium.org\r\n");
  RunUntilIdle();
  EXPECT_FALSE(stream_);
  EXPECT_TRUE(has_failed());
  EXPECT_EQ("Error during WebSocket handshake: "
            "'Sec-WebSocket-Protocol' header must not appear "
            "more than once in a response",
            failure_message());
}

// Unmatched sub-protocol should be rejected.
TEST_F(WebSocketStreamCreateTest, UnmatchedSubProtocolInResponse) {
  std::vector<std::string> sub_protocols;
  sub_protocols.push_back("chatv11.chromium.org");
  sub_protocols.push_back("chatv20.chromium.org");
  CreateAndConnectStandard("ws://localhost/testing_path",
                           "/testing_path",
                           sub_protocols,
                           "http://google.com/",
                           "Sec-WebSocket-Protocol: chatv11.chromium.org, "
                           "chatv20.chromium.org\r\n",
                           "Sec-WebSocket-Protocol: chatv21.chromium.org\r\n");
  RunUntilIdle();
  EXPECT_FALSE(stream_);
  EXPECT_TRUE(has_failed());
  EXPECT_EQ("Error during WebSocket handshake: "
            "'Sec-WebSocket-Protocol' header value 'chatv21.chromium.org' "
            "in response does not match any of sent values",
            failure_message());
}

// permessage-deflate extension basic success case.
TEST_F(WebSocketStreamCreateExtensionTest, PerMessageDeflateSuccess) {
  CreateAndConnectWithExtensions("permessage-deflate");
  EXPECT_TRUE(stream_);
  EXPECT_FALSE(has_failed());
}

// permessage-deflate extensions success with all parameters.
TEST_F(WebSocketStreamCreateExtensionTest, PerMessageDeflateParamsSuccess) {
  CreateAndConnectWithExtensions(
      "permessage-deflate; client_no_context_takeover; "
      "server_max_window_bits=11; client_max_window_bits=13; "
      "server_no_context_takeover");
  EXPECT_TRUE(stream_);
  EXPECT_FALSE(has_failed());
}

// Verify that incoming messages are actually decompressed with
// permessage-deflate enabled.
TEST_F(WebSocketStreamCreateExtensionTest, PerMessageDeflateInflates) {
  CreateAndConnectCustomResponse(
      "ws://localhost/testing_path",
      "/testing_path",
      NoSubProtocols(),
      "http://localhost/",
      "",
      WebSocketStandardResponse(
          "Sec-WebSocket-Extensions: permessage-deflate\r\n") +
          std::string(
              "\xc1\x07"  // WebSocket header (FIN + RSV1, Text payload 7 bytes)
              "\xf2\x48\xcd\xc9\xc9\x07\x00",  // "Hello" DEFLATE compressed
              9));
  RunUntilIdle();

  ASSERT_TRUE(stream_);
  ScopedVector<WebSocketFrame> frames;
  CompletionCallback callback;
  ASSERT_EQ(OK, stream_->ReadFrames(&frames, callback));
  ASSERT_EQ(1U, frames.size());
  ASSERT_EQ(5U, frames[0]->header.payload_length);
  EXPECT_EQ("Hello", std::string(frames[0]->data->data(), 5));
}

// Unknown extension in the response is rejected
TEST_F(WebSocketStreamCreateExtensionTest, UnknownExtension) {
  CreateAndConnectWithExtensions("x-unknown-extension");
  EXPECT_FALSE(stream_);
  EXPECT_TRUE(has_failed());
  EXPECT_EQ("Error during WebSocket handshake: "
            "Found an unsupported extension 'x-unknown-extension' "
            "in 'Sec-WebSocket-Extensions' header",
            failure_message());
}

// Malformed extensions are rejected (this file does not cover all possible
// parse failures, as the parser is covered thoroughly by its own unit tests).
TEST_F(WebSocketStreamCreateExtensionTest, MalformedExtension) {
  CreateAndConnectWithExtensions(";");
  EXPECT_FALSE(stream_);
  EXPECT_TRUE(has_failed());
  EXPECT_EQ(
      "Error during WebSocket handshake: 'Sec-WebSocket-Extensions' header "
      "value is rejected by the parser: ;",
      failure_message());
}

// The permessage-deflate extension may only be specified once.
TEST_F(WebSocketStreamCreateExtensionTest, OnlyOnePerMessageDeflateAllowed) {
  CreateAndConnectWithExtensions(
      "permessage-deflate, permessage-deflate; client_max_window_bits=10");
  EXPECT_FALSE(stream_);
  EXPECT_TRUE(has_failed());
  EXPECT_EQ(
      "Error during WebSocket handshake: Received duplicate permessage-deflate "
      "response",
      failure_message());
}

// permessage-deflate parameters may not be duplicated.
TEST_F(WebSocketStreamCreateExtensionTest, NoDuplicateParameters) {
  CreateAndConnectWithExtensions(
      "permessage-deflate; client_no_context_takeover; "
      "client_no_context_takeover");
  EXPECT_FALSE(stream_);
  EXPECT_TRUE(has_failed());
  EXPECT_EQ(
      "Error during WebSocket handshake: Received duplicate permessage-deflate "
      "extension parameter client_no_context_takeover",
      failure_message());
}

// permessage-deflate parameters must start with "client_" or "server_"
TEST_F(WebSocketStreamCreateExtensionTest, BadParameterPrefix) {
  CreateAndConnectWithExtensions(
      "permessage-deflate; absurd_no_context_takeover");
  EXPECT_FALSE(stream_);
  EXPECT_TRUE(has_failed());
  EXPECT_EQ(
      "Error during WebSocket handshake: Received an unexpected "
      "permessage-deflate extension parameter",
      failure_message());
}

// permessage-deflate parameters must be either *_no_context_takeover or
// *_max_window_bits
TEST_F(WebSocketStreamCreateExtensionTest, BadParameterSuffix) {
  CreateAndConnectWithExtensions(
      "permessage-deflate; client_max_content_bits=5");
  EXPECT_FALSE(stream_);
  EXPECT_TRUE(has_failed());
  EXPECT_EQ(
      "Error during WebSocket handshake: Received an unexpected "
      "permessage-deflate extension parameter",
      failure_message());
}

// *_no_context_takeover parameters must not have an argument
TEST_F(WebSocketStreamCreateExtensionTest, BadParameterValue) {
  CreateAndConnectWithExtensions(
      "permessage-deflate; client_no_context_takeover=true");
  EXPECT_FALSE(stream_);
  EXPECT_TRUE(has_failed());
  EXPECT_EQ(
      "Error during WebSocket handshake: Received invalid "
      "client_no_context_takeover parameter",
      failure_message());
}

// *_max_window_bits must have an argument
TEST_F(WebSocketStreamCreateExtensionTest, NoMaxWindowBitsArgument) {
  CreateAndConnectWithExtensions("permessage-deflate; client_max_window_bits");
  EXPECT_FALSE(stream_);
  EXPECT_TRUE(has_failed());
  EXPECT_EQ(
      "Error during WebSocket handshake: client_max_window_bits must have "
      "value",
      failure_message());
}

// *_max_window_bits must be an integer
TEST_F(WebSocketStreamCreateExtensionTest, MaxWindowBitsValueInteger) {
  CreateAndConnectWithExtensions(
      "permessage-deflate; server_max_window_bits=banana");
  EXPECT_FALSE(stream_);
  EXPECT_TRUE(has_failed());
  EXPECT_EQ(
      "Error during WebSocket handshake: Received invalid "
      "server_max_window_bits parameter",
      failure_message());
}

// *_max_window_bits must be >= 8
TEST_F(WebSocketStreamCreateExtensionTest, MaxWindowBitsValueTooSmall) {
  CreateAndConnectWithExtensions(
      "permessage-deflate; server_max_window_bits=7");
  EXPECT_FALSE(stream_);
  EXPECT_TRUE(has_failed());
  EXPECT_EQ(
      "Error during WebSocket handshake: Received invalid "
      "server_max_window_bits parameter",
      failure_message());
}

// *_max_window_bits must be <= 15
TEST_F(WebSocketStreamCreateExtensionTest, MaxWindowBitsValueTooBig) {
  CreateAndConnectWithExtensions(
      "permessage-deflate; client_max_window_bits=16");
  EXPECT_FALSE(stream_);
  EXPECT_TRUE(has_failed());
  EXPECT_EQ(
      "Error during WebSocket handshake: Received invalid "
      "client_max_window_bits parameter",
      failure_message());
}

// *_max_window_bits must not start with 0
TEST_F(WebSocketStreamCreateExtensionTest, MaxWindowBitsValueStartsWithZero) {
  CreateAndConnectWithExtensions(
      "permessage-deflate; client_max_window_bits=08");
  EXPECT_FALSE(stream_);
  EXPECT_TRUE(has_failed());
  EXPECT_EQ(
      "Error during WebSocket handshake: Received invalid "
      "client_max_window_bits parameter",
      failure_message());
}

// *_max_window_bits must not start with +
TEST_F(WebSocketStreamCreateExtensionTest, MaxWindowBitsValueStartsWithPlus) {
  CreateAndConnectWithExtensions(
      "permessage-deflate; server_max_window_bits=+9");
  EXPECT_FALSE(stream_);
  EXPECT_TRUE(has_failed());
  EXPECT_EQ(
      "Error during WebSocket handshake: Received invalid "
      "server_max_window_bits parameter",
      failure_message());
}

// TODO(ricea): Check that WebSocketDeflateStream is initialised with the
// arguments from the server. This is difficult because the data written to the
// socket is randomly masked.

// Additional Sec-WebSocket-Accept headers should be rejected.
TEST_F(WebSocketStreamCreateTest, DoubleAccept) {
  CreateAndConnectStandard(
      "ws://localhost/",
      "/",
      NoSubProtocols(),
      "http://localhost/",
      "",
      "Sec-WebSocket-Accept: s3pPLMBiTxaQ9kYGzzhZRbK+xOo=\r\n");
  RunUntilIdle();
  EXPECT_FALSE(stream_);
  EXPECT_TRUE(has_failed());
  EXPECT_EQ("Error during WebSocket handshake: "
            "'Sec-WebSocket-Accept' header must not appear "
            "more than once in a response",
            failure_message());
}

// Response code 200 must be rejected.
TEST_F(WebSocketStreamCreateTest, InvalidStatusCode) {
  static const char kInvalidStatusCodeResponse[] =
      "HTTP/1.1 200 OK\r\n"
      "Upgrade: websocket\r\n"
      "Connection: Upgrade\r\n"
      "Sec-WebSocket-Accept: s3pPLMBiTxaQ9kYGzzhZRbK+xOo=\r\n"
      "\r\n";
  CreateAndConnectCustomResponse("ws://localhost/",
                                 "/",
                                 NoSubProtocols(),
                                 "http://localhost/",
                                 "",
                                 kInvalidStatusCodeResponse);
  RunUntilIdle();
  EXPECT_TRUE(has_failed());
  EXPECT_EQ("Error during WebSocket handshake: Unexpected response code: 200",
            failure_message());
}

// Redirects are not followed (according to the WHATWG WebSocket API, which
// overrides RFC6455 for browser applications).
TEST_F(WebSocketStreamCreateTest, RedirectsRejected) {
  static const char kRedirectResponse[] =
      "HTTP/1.1 302 Moved Temporarily\r\n"
      "Content-Type: text/html\r\n"
      "Content-Length: 34\r\n"
      "Connection: keep-alive\r\n"
      "Location: ws://localhost/other\r\n"
      "\r\n"
      "<title>Moved</title><h1>Moved</h1>";
  CreateAndConnectCustomResponse("ws://localhost/",
                                 "/",
                                 NoSubProtocols(),
                                 "http://localhost/",
                                 "",
                                 kRedirectResponse);
  RunUntilIdle();
  EXPECT_TRUE(has_failed());
  EXPECT_EQ("Error during WebSocket handshake: Unexpected response code: 302",
            failure_message());
}

// Malformed responses should be rejected. HttpStreamParser will accept just
// about any garbage in the middle of the headers. To make it give up, the junk
// has to be at the start of the response. Even then, it just gets treated as an
// HTTP/0.9 response.
TEST_F(WebSocketStreamCreateTest, MalformedResponse) {
  static const char kMalformedResponse[] =
      "220 mx.google.com ESMTP\r\n"
      "HTTP/1.1 101 OK\r\n"
      "Upgrade: websocket\r\n"
      "Connection: Upgrade\r\n"
      "Sec-WebSocket-Accept: s3pPLMBiTxaQ9kYGzzhZRbK+xOo=\r\n"
      "\r\n";
  CreateAndConnectCustomResponse("ws://localhost/",
                                 "/",
                                 NoSubProtocols(),
                                 "http://localhost/",
                                 "",
                                 kMalformedResponse);
  RunUntilIdle();
  EXPECT_TRUE(has_failed());
  EXPECT_EQ("Error during WebSocket handshake: Unexpected response code: 200",
            failure_message());
}

// Upgrade header must be present.
TEST_F(WebSocketStreamCreateTest, MissingUpgradeHeader) {
  static const char kMissingUpgradeResponse[] =
      "HTTP/1.1 101 Switching Protocols\r\n"
      "Connection: Upgrade\r\n"
      "Sec-WebSocket-Accept: s3pPLMBiTxaQ9kYGzzhZRbK+xOo=\r\n"
      "\r\n";
  CreateAndConnectCustomResponse("ws://localhost/",
                                 "/",
                                 NoSubProtocols(),
                                 "http://localhost/",
                                 "",
                                 kMissingUpgradeResponse);
  RunUntilIdle();
  EXPECT_TRUE(has_failed());
  EXPECT_EQ("Error during WebSocket handshake: 'Upgrade' header is missing",
            failure_message());
}

// There must only be one upgrade header.
TEST_F(WebSocketStreamCreateTest, DoubleUpgradeHeader) {
  CreateAndConnectStandard(
      "ws://localhost/",
      "/",
      NoSubProtocols(),
      "http://localhost/",
      "", "Upgrade: HTTP/2.0\r\n");
  RunUntilIdle();
  EXPECT_TRUE(has_failed());
  EXPECT_EQ("Error during WebSocket handshake: "
            "'Upgrade' header must not appear more than once in a response",
            failure_message());
}

// There must only be one correct upgrade header.
TEST_F(WebSocketStreamCreateTest, IncorrectUpgradeHeader) {
  static const char kMissingUpgradeResponse[] =
      "HTTP/1.1 101 Switching Protocols\r\n"
      "Connection: Upgrade\r\n"
      "Sec-WebSocket-Accept: s3pPLMBiTxaQ9kYGzzhZRbK+xOo=\r\n"
      "Upgrade: hogefuga\r\n"
      "\r\n";
  CreateAndConnectCustomResponse("ws://localhost/",
                                 "/",
                                 NoSubProtocols(),
                                 "http://localhost/",
                                 "",
                                 kMissingUpgradeResponse);
  RunUntilIdle();
  EXPECT_TRUE(has_failed());
  EXPECT_EQ("Error during WebSocket handshake: "
            "'Upgrade' header value is not 'WebSocket': hogefuga",
            failure_message());
}

// Connection header must be present.
TEST_F(WebSocketStreamCreateTest, MissingConnectionHeader) {
  static const char kMissingConnectionResponse[] =
      "HTTP/1.1 101 Switching Protocols\r\n"
      "Upgrade: websocket\r\n"
      "Sec-WebSocket-Accept: s3pPLMBiTxaQ9kYGzzhZRbK+xOo=\r\n"
      "\r\n";
  CreateAndConnectCustomResponse("ws://localhost/",
                                 "/",
                                 NoSubProtocols(),
                                 "http://localhost/",
                                 "",
                                 kMissingConnectionResponse);
  RunUntilIdle();
  EXPECT_TRUE(has_failed());
  EXPECT_EQ("Error during WebSocket handshake: "
            "'Connection' header is missing",
            failure_message());
}

// Connection header must contain "Upgrade".
TEST_F(WebSocketStreamCreateTest, IncorrectConnectionHeader) {
  static const char kMissingConnectionResponse[] =
      "HTTP/1.1 101 Switching Protocols\r\n"
      "Upgrade: websocket\r\n"
      "Sec-WebSocket-Accept: s3pPLMBiTxaQ9kYGzzhZRbK+xOo=\r\n"
      "Connection: hogefuga\r\n"
      "\r\n";
  CreateAndConnectCustomResponse("ws://localhost/",
                                 "/",
                                 NoSubProtocols(),
                                 "http://localhost/",
                                 "",
                                 kMissingConnectionResponse);
  RunUntilIdle();
  EXPECT_TRUE(has_failed());
  EXPECT_EQ("Error during WebSocket handshake: "
            "'Connection' header value must contain 'Upgrade'",
            failure_message());
}

// Connection header is permitted to contain other tokens.
TEST_F(WebSocketStreamCreateTest, AdditionalTokenInConnectionHeader) {
  static const char kAdditionalConnectionTokenResponse[] =
      "HTTP/1.1 101 Switching Protocols\r\n"
      "Upgrade: websocket\r\n"
      "Connection: Upgrade, Keep-Alive\r\n"
      "Sec-WebSocket-Accept: s3pPLMBiTxaQ9kYGzzhZRbK+xOo=\r\n"
      "\r\n";
  CreateAndConnectCustomResponse("ws://localhost/",
                                 "/",
                                 NoSubProtocols(),
                                 "http://localhost/",
                                 "",
                                 kAdditionalConnectionTokenResponse);
  RunUntilIdle();
  EXPECT_FALSE(has_failed());
  EXPECT_TRUE(stream_);
}

// Sec-WebSocket-Accept header must be present.
TEST_F(WebSocketStreamCreateTest, MissingSecWebSocketAccept) {
  static const char kMissingAcceptResponse[] =
      "HTTP/1.1 101 Switching Protocols\r\n"
      "Upgrade: websocket\r\n"
      "Connection: Upgrade\r\n"
      "\r\n";
  CreateAndConnectCustomResponse("ws://localhost/",
                                 "/",
                                 NoSubProtocols(),
                                 "http://localhost/",
                                 "",
                                 kMissingAcceptResponse);
  RunUntilIdle();
  EXPECT_TRUE(has_failed());
  EXPECT_EQ("Error during WebSocket handshake: "
            "'Sec-WebSocket-Accept' header is missing",
            failure_message());
}

// Sec-WebSocket-Accept header must match the key that was sent.
TEST_F(WebSocketStreamCreateTest, WrongSecWebSocketAccept) {
  static const char kIncorrectAcceptResponse[] =
      "HTTP/1.1 101 Switching Protocols\r\n"
      "Upgrade: websocket\r\n"
      "Connection: Upgrade\r\n"
      "Sec-WebSocket-Accept: x/byyPZ2tOFvJCGkkugcKvqhhPk=\r\n"
      "\r\n";
  CreateAndConnectCustomResponse("ws://localhost/",
                                 "/",
                                 NoSubProtocols(),
                                 "http://localhost/",
                                 "",
                                 kIncorrectAcceptResponse);
  RunUntilIdle();
  EXPECT_TRUE(has_failed());
  EXPECT_EQ("Error during WebSocket handshake: "
            "Incorrect 'Sec-WebSocket-Accept' header value",
            failure_message());
}

// Cancellation works.
TEST_F(WebSocketStreamCreateTest, Cancellation) {
  CreateAndConnectStandard(
      "ws://localhost/", "/", NoSubProtocols(), "http://localhost/", "", "");
  stream_request_.reset();
  RunUntilIdle();
  EXPECT_FALSE(has_failed());
  EXPECT_FALSE(stream_);
  EXPECT_FALSE(request_info_);
  EXPECT_FALSE(response_info_);
}

// Connect failure must look just like negotiation failure.
TEST_F(WebSocketStreamCreateTest, ConnectionFailure) {
  scoped_ptr<DeterministicSocketData> socket_data(
      new DeterministicSocketData(NULL, 0, NULL, 0));
  socket_data->set_connect_data(
      MockConnect(SYNCHRONOUS, ERR_CONNECTION_REFUSED));
  CreateAndConnectRawExpectations("ws://localhost/", NoSubProtocols(),
                                  "http://localhost/", socket_data.Pass());
  RunUntilIdle();
  EXPECT_TRUE(has_failed());
  EXPECT_EQ("Error in connection establishment: net::ERR_CONNECTION_REFUSED",
            failure_message());
  EXPECT_FALSE(request_info_);
  EXPECT_FALSE(response_info_);
}

// Connect timeout must look just like any other failure.
TEST_F(WebSocketStreamCreateTest, ConnectionTimeout) {
  scoped_ptr<DeterministicSocketData> socket_data(
      new DeterministicSocketData(NULL, 0, NULL, 0));
  socket_data->set_connect_data(
      MockConnect(ASYNC, ERR_CONNECTION_TIMED_OUT));
  CreateAndConnectRawExpectations("ws://localhost/", NoSubProtocols(),
                                  "http://localhost/", socket_data.Pass());
  RunUntilIdle();
  EXPECT_TRUE(has_failed());
  EXPECT_EQ("Error in connection establishment: net::ERR_CONNECTION_TIMED_OUT",
            failure_message());
}

// Cancellation during connect works.
TEST_F(WebSocketStreamCreateTest, CancellationDuringConnect) {
  scoped_ptr<DeterministicSocketData> socket_data(
      new DeterministicSocketData(NULL, 0, NULL, 0));
  socket_data->set_connect_data(MockConnect(SYNCHRONOUS, ERR_IO_PENDING));
  CreateAndConnectRawExpectations("ws://localhost/",
                                  NoSubProtocols(),
                                  "http://localhost/",
                                  socket_data.Pass());
  stream_request_.reset();
  RunUntilIdle();
  EXPECT_FALSE(has_failed());
  EXPECT_FALSE(stream_);
}

// Cancellation during write of the request headers works.
TEST_F(WebSocketStreamCreateTest, CancellationDuringWrite) {
  // We seem to need at least two operations in order to use SetStop().
  MockWrite writes[] = {MockWrite(ASYNC, 0, "GET / HTTP/"),
                        MockWrite(ASYNC, 1, "1.1\r\n")};
  // We keep a copy of the pointer so that we can call RunFor() on it later.
  DeterministicSocketData* socket_data(
      new DeterministicSocketData(NULL, 0, writes, arraysize(writes)));
  socket_data->set_connect_data(MockConnect(SYNCHRONOUS, OK));
  socket_data->SetStop(1);
  CreateAndConnectRawExpectations("ws://localhost/",
                                  NoSubProtocols(),
                                  "http://localhost/",
                                  make_scoped_ptr(socket_data));
  socket_data->Run();
  stream_request_.reset();
  RunUntilIdle();
  EXPECT_FALSE(has_failed());
  EXPECT_FALSE(stream_);
  EXPECT_TRUE(request_info_);
  EXPECT_FALSE(response_info_);
}

// Cancellation during read of the response headers works.
TEST_F(WebSocketStreamCreateTest, CancellationDuringRead) {
  std::string request = WebSocketStandardRequest("/", "http://localhost/", "");
  MockWrite writes[] = {MockWrite(ASYNC, 0, request.c_str())};
  MockRead reads[] = {
    MockRead(ASYNC, 1, "HTTP/1.1 101 Switching Protocols\r\nUpgr"),
  };
  DeterministicSocketData* socket_data(new DeterministicSocketData(
      reads, arraysize(reads), writes, arraysize(writes)));
  socket_data->set_connect_data(MockConnect(SYNCHRONOUS, OK));
  socket_data->SetStop(1);
  CreateAndConnectRawExpectations("ws://localhost/",
                                  NoSubProtocols(),
                                  "http://localhost/",
                                  make_scoped_ptr(socket_data));
  socket_data->Run();
  stream_request_.reset();
  RunUntilIdle();
  EXPECT_FALSE(has_failed());
  EXPECT_FALSE(stream_);
  EXPECT_TRUE(request_info_);
  EXPECT_FALSE(response_info_);
}

// Over-size response headers (> 256KB) should not cause a crash.  This is a
// regression test for crbug.com/339456. It is based on the layout test
// "cookie-flood.html".
TEST_F(WebSocketStreamCreateTest, VeryLargeResponseHeaders) {
  std::string set_cookie_headers;
  set_cookie_headers.reserve(45 * 10000);
  for (int i = 0; i < 10000; ++i) {
    set_cookie_headers +=
        base::StringPrintf("Set-Cookie: WK-websocket-test-flood-%d=1\r\n", i);
  }
  CreateAndConnectStandard("ws://localhost/", "/", NoSubProtocols(),
                           "http://localhost/", "", set_cookie_headers);
  RunUntilIdle();
  EXPECT_TRUE(has_failed());
  EXPECT_FALSE(response_info_);
}

// If the remote host closes the connection without sending headers, we should
// log the console message "Connection closed before receiving a handshake
// response".
TEST_F(WebSocketStreamCreateTest, NoResponse) {
  std::string request = WebSocketStandardRequest("/", "http://localhost/", "");
  MockWrite writes[] = {MockWrite(ASYNC, request.data(), request.size(), 0)};
  MockRead reads[] = {MockRead(ASYNC, 0, 1)};
  DeterministicSocketData* socket_data(new DeterministicSocketData(
      reads, arraysize(reads), writes, arraysize(writes)));
  socket_data->set_connect_data(MockConnect(SYNCHRONOUS, OK));
  CreateAndConnectRawExpectations("ws://localhost/",
                                  NoSubProtocols(),
                                  "http://localhost/",
                                  make_scoped_ptr(socket_data));
  socket_data->RunFor(2);
  EXPECT_TRUE(has_failed());
  EXPECT_FALSE(stream_);
  EXPECT_FALSE(response_info_);
  EXPECT_EQ("Connection closed before receiving a handshake response",
            failure_message());
}

}  // namespace
}  // namespace net