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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	inspector_socket_server.cc	Lines:	294	322	91.3 %
Date:	2022-06-06 04:15:48	Branches:	97	128	75.8 %


#include "inspector_socket_server.h"

#include "node.h"
#include "util-inl.h"
#include "uv.h"
#include "zlib.h"

#include <algorithm>
#include <map>
#include <set>
#include <sstream>

namespace node {
namespace inspector {

// Function is declared in inspector_io.h so the rest of the node does not
// depend on inspector_socket_server.h
std::string FormatWsAddress(const std::string& host, int port,
                            const std::string& target_id,
                            bool include_protocol);
namespace {

static const uint8_t PROTOCOL_JSON[] = {
  #include "v8_inspector_protocol_json.h"  // NOLINT(build/include_order)
};

void Escape(std::string* string) {
  for (char& c : *string) {
    c = (c == '\"' || c == '\\') ? '_' : c;
  }
}

std::string FormatHostPort(const std::string& host, int port) {
  // Host is valid (socket was bound) so colon means it's a v6 IP address
  bool v6 = host.find(':') != std::string::npos;
  std::ostringstream url;
  if (v6) {
    url << '[';
  }
  url << host;
  if (v6) {
    url << ']';
  }
  url << ':' << port;
  return url.str();
}

std::string FormatAddress(const std::string& host,
                          const std::string& target_id,
                          bool include_protocol) {
  std::ostringstream url;
  if (include_protocol)
    url << "ws://";
  url << host << '/' << target_id;
  return url.str();
}

std::string MapToString(const std::map<std::string, std::string>& object) {
  bool first = true;
  std::ostringstream json;
  json << "{\n";
  for (const auto& name_value : object) {
    if (!first)
      json << ",\n";
    first = false;
    json << "  \"" << name_value.first << "\": \"";
    json << name_value.second << "\"";
  }
  json << "\n} ";
  return json.str();
}

std::string MapsToString(
    const std::vector<std::map<std::string, std::string>>& array) {
  bool first = true;
  std::ostringstream json;
  json << "[ ";
  for (const auto& object : array) {
    if (!first)
      json << ", ";
    first = false;
    json << MapToString(object);
  }
  json << "]\n\n";
  return json.str();
}

const char* MatchPathSegment(const char* path, const char* expected) {
  size_t len = strlen(expected);
  if (StringEqualNoCaseN(path, expected, len)) {
    if (path[len] == '/') return path + len + 1;
    if (path[len] == '\0') return path + len;
  }
  return nullptr;
}

void SendHttpResponse(InspectorSocket* socket,
                      const std::string& response,
                      int code) {
  const char HEADERS[] = "HTTP/1.0 %d OK\r\n"
                         "Content-Type: application/json; charset=UTF-8\r\n"
                         "Cache-Control: no-cache\r\n"
                         "Content-Length: %zu\r\n"
                         "\r\n";
  char header[sizeof(HEADERS) + 20];
  int header_len = snprintf(header,
                            sizeof(header),
                            HEADERS,
                            code,
                            response.size());
  socket->Write(header, header_len);
  socket->Write(response.data(), response.size());
}

void SendVersionResponse(InspectorSocket* socket) {
  std::map<std::string, std::string> response;
  response["Browser"] = "node.js/" NODE_VERSION;
  response["Protocol-Version"] = "1.1";
  SendHttpResponse(socket, MapToString(response), 200);
}

void SendHttpNotFound(InspectorSocket* socket) {
  SendHttpResponse(socket, "", 404);
}

void SendProtocolJson(InspectorSocket* socket) {
  z_stream strm;
  strm.zalloc = Z_NULL;
  strm.zfree = Z_NULL;
  strm.opaque = Z_NULL;
  CHECK_EQ(Z_OK, inflateInit(&strm));
  static const size_t kDecompressedSize =
      PROTOCOL_JSON[0] * 0x10000u +
      PROTOCOL_JSON[1] * 0x100u +
      PROTOCOL_JSON[2];
  strm.next_in = const_cast<uint8_t*>(PROTOCOL_JSON + 3);
  strm.avail_in = sizeof(PROTOCOL_JSON) - 3;
  std::string data(kDecompressedSize, '\0');
  strm.next_out = reinterpret_cast<Byte*>(&data[0]);
  strm.avail_out = data.size();
  CHECK_EQ(Z_STREAM_END, inflate(&strm, Z_FINISH));
  CHECK_EQ(0, strm.avail_out);
  CHECK_EQ(Z_OK, inflateEnd(&strm));
  SendHttpResponse(socket, data, 200);
}
}  // namespace

std::string FormatWsAddress(const std::string& host, int port,
                            const std::string& target_id,
                            bool include_protocol) {
  return FormatAddress(FormatHostPort(host, port), target_id, include_protocol);
}

class SocketSession {
 public:
  SocketSession(InspectorSocketServer* server, int id, int server_port);
  void Close() {
    ws_socket_.reset();
  }
  void Send(const std::string& message);
  void Own(InspectorSocket::Pointer ws_socket) {
    ws_socket_ = std::move(ws_socket);
  }
  int id() const { return id_; }
  int server_port() {
    return server_port_;
  }
  InspectorSocket* ws_socket() {
    return ws_socket_.get();
  }
  void Accept(const std::string& ws_key) {
    ws_socket_->AcceptUpgrade(ws_key);
  }
  void Decline() {
    ws_socket_->CancelHandshake();
  }

  class Delegate : public InspectorSocket::Delegate {
   public:
    Delegate(InspectorSocketServer* server, int session_id)
             : server_(server), session_id_(session_id) { }
    ~Delegate() override {
      server_->SessionTerminated(session_id_);
    }
    void OnHttpGet(const std::string& host, const std::string& path) override;
    void OnSocketUpgrade(const std::string& host, const std::string& path,
                         const std::string& ws_key) override;
    void OnWsFrame(const std::vector<char>& data) override;

   private:
    SocketSession* Session() {
      return server_->Session(session_id_);
    }

    InspectorSocketServer* server_;
    int session_id_;
  };

 private:
  const int id_;
  InspectorSocket::Pointer ws_socket_;
  const int server_port_;
};

class ServerSocket {
 public:
  explicit ServerSocket(InspectorSocketServer* server)
                        : tcp_socket_(uv_tcp_t()), server_(server) {}
  int Listen(sockaddr* addr, uv_loop_t* loop);
  void Close() {
    uv_close(reinterpret_cast<uv_handle_t*>(&tcp_socket_), FreeOnCloseCallback);
  }
  int port() const { return port_; }

 private:
  template <typename UvHandle>
  static ServerSocket* FromTcpSocket(UvHandle* socket) {
    return node::ContainerOf(&ServerSocket::tcp_socket_,
                             reinterpret_cast<uv_tcp_t*>(socket));
  }
  static void SocketConnectedCallback(uv_stream_t* tcp_socket, int status);
  static void FreeOnCloseCallback(uv_handle_t* tcp_socket_) {
    delete FromTcpSocket(tcp_socket_);
  }
  int DetectPort();
  ~ServerSocket() = default;

  uv_tcp_t tcp_socket_;
  InspectorSocketServer* server_;
  int port_ = -1;
};

void PrintDebuggerReadyMessage(
    const std::string& host,
    const std::vector<InspectorSocketServer::ServerSocketPtr>& server_sockets,
    const std::vector<std::string>& ids,
    const char* verb,
    bool publish_uid_stderr,
    FILE* out) {
  if (!publish_uid_stderr || out == nullptr) {
    return;
  }
  for (const auto& server_socket : server_sockets) {
    for (const std::string& id : ids) {
      fprintf(out, "Debugger %s on %s\n",
              verb,
              FormatWsAddress(host, server_socket->port(), id, true).c_str());
    }
  }
  fprintf(out, "For help, see: %s\n",
          "https://nodejs.org/en/docs/inspector");
  fflush(out);
}

InspectorSocketServer::InspectorSocketServer(
    std::unique_ptr<SocketServerDelegate> delegate, uv_loop_t* loop,
    const std::string& host, int port,
    const InspectPublishUid& inspect_publish_uid, FILE* out)
    : loop_(loop),
      delegate_(std::move(delegate)),
      host_(host),
      port_(port),
      inspect_publish_uid_(inspect_publish_uid),
      next_session_id_(0),
      out_(out) {
  delegate_->AssignServer(this);
  state_ = ServerState::kNew;
}

InspectorSocketServer::~InspectorSocketServer() = default;

SocketSession* InspectorSocketServer::Session(int session_id) {
  auto it = connected_sessions_.find(session_id);
  return it == connected_sessions_.end() ? nullptr : it->second.second.get();
}

void InspectorSocketServer::SessionStarted(int session_id,
                                           const std::string& id,
                                           const std::string& ws_key) {
  SocketSession* session = Session(session_id);
  if (!TargetExists(id)) {
    session->Decline();
    return;
  }
  connected_sessions_[session_id].first = id;
  session->Accept(ws_key);
  delegate_->StartSession(session_id, id);
}

void InspectorSocketServer::SessionTerminated(int session_id) {
  if (Session(session_id) == nullptr) {
    return;
  }
  bool was_attached = connected_sessions_[session_id].first != "";
  if (was_attached) {
    delegate_->EndSession(session_id);
  }
  connected_sessions_.erase(session_id);
  if (connected_sessions_.empty()) {
    if (was_attached && state_ == ServerState::kRunning
        && !server_sockets_.empty()) {
      PrintDebuggerReadyMessage(host_,
                                server_sockets_,
                                delegate_->GetTargetIds(),
                                "ending",
                                inspect_publish_uid_.console,
                                out_);
    }
    if (state_ == ServerState::kStopped) {
      delegate_.reset();
    }
  }
}

bool InspectorSocketServer::HandleGetRequest(int session_id,
                                             const std::string& host,
                                             const std::string& path) {
  SocketSession* session = Session(session_id);
  InspectorSocket* socket = session->ws_socket();
  if (!inspect_publish_uid_.http) {
    SendHttpNotFound(socket);
    return true;
  }
  const char* command = MatchPathSegment(path.c_str(), "/json");
  if (command == nullptr)
    return false;

  if (MatchPathSegment(command, "list") || command[0] == '\0') {
    SendListResponse(socket, host, session);
    return true;
  } else if (MatchPathSegment(command, "protocol")) {
    SendProtocolJson(socket);
    return true;
  } else if (MatchPathSegment(command, "version")) {
    SendVersionResponse(socket);
    return true;
  }
  return false;
}

void InspectorSocketServer::SendListResponse(InspectorSocket* socket,
                                             const std::string& host,
                                             SocketSession* session) {
  std::vector<std::map<std::string, std::string>> response;
  for (const std::string& id : delegate_->GetTargetIds()) {
    response.push_back(std::map<std::string, std::string>());
    std::map<std::string, std::string>& target_map = response.back();
    target_map["description"] = "node.js instance";
    target_map["faviconUrl"] =
                        "https://nodejs.org/static/images/favicons/favicon.ico";
    target_map["id"] = id;
    target_map["title"] = delegate_->GetTargetTitle(id);
    Escape(&target_map["title"]);
    target_map["type"] = "node";
    // This attribute value is a "best effort" URL that is passed as a JSON
    // string. It is not guaranteed to resolve to a valid resource.
    target_map["url"] = delegate_->GetTargetUrl(id);
    Escape(&target_map["url"]);

    std::string detected_host = host;
    if (detected_host.empty()) {
      detected_host = FormatHostPort(socket->GetHost(),
                                     session->server_port());
    }
    std::string formatted_address = FormatAddress(detected_host, id, false);
    target_map["devtoolsFrontendUrl"] = GetFrontendURL(false,
                                                       formatted_address);
    // The compat URL is for Chrome browsers older than 66.0.3345.0
    target_map["devtoolsFrontendUrlCompat"] = GetFrontendURL(true,
                                                             formatted_address);
    target_map["webSocketDebuggerUrl"] = FormatAddress(detected_host, id, true);
  }
  SendHttpResponse(socket, MapsToString(response), 200);
}

std::string InspectorSocketServer::GetFrontendURL(bool is_compat,
    const std::string &formatted_address) {
  std::ostringstream frontend_url;
  frontend_url << "devtools://devtools/bundled/";
  frontend_url << (is_compat ? "inspector" : "js_app");
  frontend_url << ".html?experiments=true&v8only=true&ws=";
  frontend_url << formatted_address;
  return frontend_url.str();
}

bool InspectorSocketServer::Start() {
  CHECK_NOT_NULL(delegate_);
  CHECK_EQ(state_, ServerState::kNew);
  std::unique_ptr<SocketServerDelegate> delegate_holder;
  // We will return it if startup is successful
  delegate_.swap(delegate_holder);
  struct addrinfo hints;
  memset(&hints, 0, sizeof(hints));
  hints.ai_flags = AI_NUMERICSERV;
  hints.ai_socktype = SOCK_STREAM;
  uv_getaddrinfo_t req;
  const std::string port_string = std::to_string(port_);
  int err = uv_getaddrinfo(loop_, &req, nullptr, host_.c_str(),
                           port_string.c_str(), &hints);
  if (err < 0) {
    if (out_ != nullptr) {
      fprintf(out_, "Unable to resolve \"%s\": %s\n", host_.c_str(),
              uv_strerror(err));
    }
    return false;
  }
  for (addrinfo* address = req.addrinfo; address != nullptr;
       address = address->ai_next) {
    auto server_socket = ServerSocketPtr(new ServerSocket(this));
    err = server_socket->Listen(address->ai_addr, loop_);
    if (err == 0)
      server_sockets_.push_back(std::move(server_socket));
  }
  uv_freeaddrinfo(req.addrinfo);

  // We only show error if we failed to start server on all addresses. We only
  // show one error, for the last address.
  if (server_sockets_.empty()) {
    if (out_ != nullptr) {
      fprintf(out_, "Starting inspector on %s:%d failed: %s\n",
              host_.c_str(), port_, uv_strerror(err));
      fflush(out_);
    }
    return false;
  }
  delegate_.swap(delegate_holder);
  state_ = ServerState::kRunning;
  PrintDebuggerReadyMessage(host_,
                            server_sockets_,
                            delegate_->GetTargetIds(),
                            "listening",
                            inspect_publish_uid_.console,
                            out_);
  return true;
}

void InspectorSocketServer::Stop() {
  if (state_ == ServerState::kStopped)
    return;
  CHECK_EQ(state_, ServerState::kRunning);
  state_ = ServerState::kStopped;
  server_sockets_.clear();
  if (done())
    delegate_.reset();
}

void InspectorSocketServer::TerminateConnections() {
  for (const auto& key_value : connected_sessions_)
    key_value.second.second->Close();
}

bool InspectorSocketServer::TargetExists(const std::string& id) {
  const std::vector<std::string>& target_ids = delegate_->GetTargetIds();
  const auto& found = std::find(target_ids.begin(), target_ids.end(), id);
  return found != target_ids.end();
}

int InspectorSocketServer::Port() const {
  if (!server_sockets_.empty()) {
    return server_sockets_[0]->port();
  }
  return port_;
}

void InspectorSocketServer::Accept(int server_port,
                                   uv_stream_t* server_socket) {
  std::unique_ptr<SocketSession> session(
      new SocketSession(this, next_session_id_++, server_port));

  InspectorSocket::DelegatePointer delegate =
      InspectorSocket::DelegatePointer(
          new SocketSession::Delegate(this, session->id()));

  InspectorSocket::Pointer inspector =
      InspectorSocket::Accept(server_socket, std::move(delegate));
  if (inspector) {
    session->Own(std::move(inspector));
    connected_sessions_[session->id()].second = std::move(session);
  }
}

void InspectorSocketServer::Send(int session_id, const std::string& message) {
  SocketSession* session = Session(session_id);
  if (session != nullptr) {
    session->Send(message);
  }
}

void InspectorSocketServer::CloseServerSocket(ServerSocket* server) {
  server->Close();
}

// InspectorSession tracking
SocketSession::SocketSession(InspectorSocketServer* server, int id,
                             int server_port)
    : id_(id), server_port_(server_port) {}

void SocketSession::Send(const std::string& message) {
  ws_socket_->Write(message.data(), message.length());
}

void SocketSession::Delegate::OnHttpGet(const std::string& host,
                                        const std::string& path) {
  if (!server_->HandleGetRequest(session_id_, host, path))
    Session()->ws_socket()->CancelHandshake();
}

void SocketSession::Delegate::OnSocketUpgrade(const std::string& host,
                                              const std::string& path,
                                              const std::string& ws_key) {
  std::string id = path.empty() ? path : path.substr(1);
  server_->SessionStarted(session_id_, id, ws_key);
}

void SocketSession::Delegate::OnWsFrame(const std::vector<char>& data) {
  server_->MessageReceived(session_id_,
                           std::string(data.data(), data.size()));
}

// ServerSocket implementation
int ServerSocket::DetectPort() {
  sockaddr_storage addr;
  int len = sizeof(addr);
  int err = uv_tcp_getsockname(&tcp_socket_,
                               reinterpret_cast<struct sockaddr*>(&addr), &len);
  if (err != 0)
    return err;
  int port;
  if (addr.ss_family == AF_INET6)
    port = reinterpret_cast<const sockaddr_in6*>(&addr)->sin6_port;
  else
    port = reinterpret_cast<const sockaddr_in*>(&addr)->sin_port;
  port_ = ntohs(port);
  return err;
}

int ServerSocket::Listen(sockaddr* addr, uv_loop_t* loop) {
  uv_tcp_t* server = &tcp_socket_;
  CHECK_EQ(0, uv_tcp_init(loop, server));
  int err = uv_tcp_bind(server, addr, 0);
  if (err == 0) {
    // 511 is the value used by a 'net' module by default
    err = uv_listen(reinterpret_cast<uv_stream_t*>(server), 511,
                    ServerSocket::SocketConnectedCallback);
  }
  if (err == 0) {
    err = DetectPort();
  }
  return err;
}

// static
void ServerSocket::SocketConnectedCallback(uv_stream_t* tcp_socket,
                                           int status) {
  if (status == 0) {
    ServerSocket* server_socket = ServerSocket::FromTcpSocket(tcp_socket);
    // Memory is freed when the socket closes.
    server_socket->server_->Accept(server_socket->port_, tcp_socket);
  }
}
}  // namespace inspector
}  // namespace node


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			#include "inspector_socket_server.h"
2
3			#include "node.h"
4			#include "util-inl.h"
5			#include "uv.h"
6			#include "zlib.h"
7
8			#include <algorithm>
9			#include <map>
10			#include <set>
11			#include <sstream>
12
13			namespace node {
14			namespace inspector {
15
16			// Function is declared in inspector_io.h so the rest of the node does not
17			// depend on inspector_socket_server.h
18			std::string FormatWsAddress(const std::string& host, int port,
19			const std::string& target_id,
20			bool include_protocol);
21			namespace {
22
23			static const uint8_t PROTOCOL_JSON[] = {
24			#include "v8_inspector_protocol_json.h" // NOLINT(build/include_order)
25			};
26
27		42	void Escape(std::string* string) {
28	✓✓	2959	for (char& c : *string) {
29	✓✗✓✗	2917	c = (c == '\"' \|\| c == '\\') ? '_' : c;
30			}
31		42	}
32
33		84	std::string FormatHostPort(const std::string& host, int port) {
34			// Host is valid (socket was bound) so colon means it's a v6 IP address
35		84	bool v6 = host.find(':') != std::string::npos;
36		168	std::ostringstream url;
37	✓✓	84	if (v6) {
38		4	url << '[';
39			}
40		84	url << host;
41	✓✓	84	if (v6) {
42		4	url << ']';
43			}
44		84	url << ':' << port;
45		84	return url.str();
46			}
47
48		126	std::string FormatAddress(const std::string& host,
49			const std::string& target_id,
50			bool include_protocol) {
51		252	std::ostringstream url;
52	✓✓	126	if (include_protocol)
53		105	url << "ws://";
54		126	url << host << '/' << target_id;
55		126	return url.str();
56			}
57
58		22	std::string MapToString(const std::map<std::string, std::string>& object) {
59		22	bool first = true;
60		44	std::ostringstream json;
61		22	json << "{\n";
62	✓✓	213	for (const auto& name_value : object) {
63	✓✓	191	if (!first)
64		169	json << ",\n";
65		191	first = false;
66		191	json << " \"" << name_value.first << "\": \"";
67		191	json << name_value.second << "\"";
68			}
69		22	json << "\n} ";
70		22	return json.str();
71			}
72
73		27	std::string MapsToString(
74			const std::vector<std::map<std::string, std::string>>& array) {
75		27	bool first = true;
76		54	std::ostringstream json;
77		27	json << "[ ";
78	✓✓	48	for (const auto& object : array) {
79	✗✓	21	if (!first)
80			json << ", ";
81		21	first = false;
82		21	json << MapToString(object);
83			}
84		27	json << "]\n\n";
85		27	return json.str();
86			}
87
88		70	const char* MatchPathSegment(const char* path, const char* expected) {
89		70	size_t len = strlen(expected);
90	✓✓	70	if (StringEqualNoCaseN(path, expected, len)) {
91	✓✓	57	if (path[len] == '/') return path + len + 1;
92	✓✗	28	if (path[len] == '\0') return path + len;
93			}
94		13	return nullptr;
95			}
96
97		29	void SendHttpResponse(InspectorSocket* socket,
98			const std::string& response,
99			int code) {
100		29	const char HEADERS[] = "HTTP/1.0 %d OK\r\n"
101			"Content-Type: application/json; charset=UTF-8\r\n"
102			"Cache-Control: no-cache\r\n"
103			"Content-Length: %zu\r\n"
104			"\r\n";
105			char header[sizeof(HEADERS) + 20];
106		29	int header_len = snprintf(header,
107			sizeof(header),
108			HEADERS,
109			code,
110			response.size());
111		29	socket->Write(header, header_len);
112		29	socket->Write(response.data(), response.size());
113		29	}
114
115		1	void SendVersionResponse(InspectorSocket* socket) {
116		1	std::map<std::string, std::string> response;
117		1	response["Browser"] = "node.js/" NODE_VERSION;
118		1	response["Protocol-Version"] = "1.1";
119		1	SendHttpResponse(socket, MapToString(response), 200);
120		1	}
121
122		1	void SendHttpNotFound(InspectorSocket* socket) {
123		1	SendHttpResponse(socket, "", 404);
124		1	}
125
126			void SendProtocolJson(InspectorSocket* socket) {
127			z_stream strm;
128			strm.zalloc = Z_NULL;
129			strm.zfree = Z_NULL;
130			strm.opaque = Z_NULL;
131			CHECK_EQ(Z_OK, inflateInit(&strm));
132			static const size_t kDecompressedSize =
133			PROTOCOL_JSON[0] * 0x10000u +
134			PROTOCOL_JSON[1] * 0x100u +
135			PROTOCOL_JSON[2];
136			strm.next_in = const_cast<uint8_t*>(PROTOCOL_JSON + 3);
137			strm.avail_in = sizeof(PROTOCOL_JSON) - 3;
138			std::string data(kDecompressedSize, '\0');
139			strm.next_out = reinterpret_cast<Byte*>(&data[0]);
140			strm.avail_out = data.size();
141			CHECK_EQ(Z_STREAM_END, inflate(&strm, Z_FINISH));
142			CHECK_EQ(0, strm.avail_out);
143			CHECK_EQ(Z_OK, inflateEnd(&strm));
144			SendHttpResponse(socket, data, 200);
145			}
146			} // namespace
147
148		84	std::string FormatWsAddress(const std::string& host, int port,
149			const std::string& target_id,
150			bool include_protocol) {
151		84	return FormatAddress(FormatHostPort(host, port), target_id, include_protocol);
152			}
153
154			class SocketSession {
155			public:
156			SocketSession(InspectorSocketServer* server, int id, int server_port);
157		3	void Close() {
158		3	ws_socket_.reset();
159		3	}
160			void Send(const std::string& message);
161		55	void Own(InspectorSocket::Pointer ws_socket) {
162		55	ws_socket_ = std::move(ws_socket);
163		55	}
164		110	int id() const { return id_; }
165			int server_port() {
166			return server_port_;
167			}
168		35	InspectorSocket* ws_socket() {
169		35	return ws_socket_.get();
170			}
171		23	void Accept(const std::string& ws_key) {
172		23	ws_socket_->AcceptUpgrade(ws_key);
173		23	}
174		1	void Decline() {
175		1	ws_socket_->CancelHandshake();
176		1	}
177
178			class Delegate : public InspectorSocket::Delegate {
179			public:
180		55	Delegate(InspectorSocketServer* server, int session_id)
181		55	: server_(server), session_id_(session_id) { }
182		220	~Delegate() override {
183		110	server_->SessionTerminated(session_id_);
184		220	}
185			void OnHttpGet(const std::string& host, const std::string& path) override;
186			void OnSocketUpgrade(const std::string& host, const std::string& path,
187			const std::string& ws_key) override;
188			void OnWsFrame(const std::vector<char>& data) override;
189
190			private:
191		3	SocketSession* Session() {
192		3	return server_->Session(session_id_);
193			}
194
195			InspectorSocketServer* server_;
196			int session_id_;
197			};
198
199			private:
200			const int id_;
201			InspectorSocket::Pointer ws_socket_;
202			const int server_port_;
203			};
204
205			class ServerSocket {
206			public:
207		94	explicit ServerSocket(InspectorSocketServer* server)
208		94	: tcp_socket_(uv_tcp_t()), server_(server) {}
209			int Listen(sockaddr* addr, uv_loop_t* loop);
210		94	void Close() {
211		94	uv_close(reinterpret_cast<uv_handle_t*>(&tcp_socket_), FreeOnCloseCallback);
212		94	}
213		169	int port() const { return port_; }
214
215			private:
216			template <typename UvHandle>
217		298	static ServerSocket* FromTcpSocket(UvHandle* socket) {
218		596	return node::ContainerOf(&ServerSocket::tcp_socket_,
219		298	reinterpret_cast<uv_tcp_t*>(socket));
220			}
221			static void SocketConnectedCallback(uv_stream_t* tcp_socket, int status);
222		94	static void FreeOnCloseCallback(uv_handle_t* tcp_socket_) {
223		94	delete FromTcpSocket(tcp_socket_);
224		94	}
225			int DetectPort();
226			~ServerSocket() = default;
227
228			uv_tcp_t tcp_socket_;
229			InspectorSocketServer* server_;
230			int port_ = -1;
231			};
232
233		89	void PrintDebuggerReadyMessage(
234			const std::string& host,
235			const std::vector<InspectorSocketServer::ServerSocketPtr>& server_sockets,
236			const std::vector<std::string>& ids,
237			const char* verb,
238			bool publish_uid_stderr,
239			FILE* out) {
240	✓✓✓✓	89	if (!publish_uid_stderr \|\| out == nullptr) {
241		12	return;
242			}
243	✓✓	156	for (const auto& server_socket : server_sockets) {
244	✓✓	158	for (const std::string& id : ids) {
245		79	fprintf(out, "Debugger %s on %s\n",
246			verb,
247		158	FormatWsAddress(host, server_socket->port(), id, true).c_str());
248			}
249			}
250		77	fprintf(out, "For help, see: %s\n",
251			"https://nodejs.org/en/docs/inspector");
252		77	fflush(out);
253			}
254
255		89	InspectorSocketServer::InspectorSocketServer(
256			std::unique_ptr<SocketServerDelegate> delegate, uv_loop_t* loop,
257			const std::string& host, int port,
258		89	const InspectPublishUid& inspect_publish_uid, FILE* out)
259			: loop_(loop),
260		89	delegate_(std::move(delegate)),
261			host_(host),
262			port_(port),
263			inspect_publish_uid_(inspect_publish_uid),
264			next_session_id_(0),
265		89	out_(out) {
266		89	delegate_->AssignServer(this);
267		89	state_ = ServerState::kNew;
268		89	}
269
270			InspectorSocketServer::~InspectorSocketServer() = default;
271
272		2214	SocketSession* InspectorSocketServer::Session(int session_id) {
273		2214	auto it = connected_sessions_.find(session_id);
274	✗✓	2214	return it == connected_sessions_.end() ? nullptr : it->second.second.get();
275			}
276
277		24	void InspectorSocketServer::SessionStarted(int session_id,
278			const std::string& id,
279			const std::string& ws_key) {
280		24	SocketSession* session = Session(session_id);
281	✓✓	24	if (!TargetExists(id)) {
282		1	session->Decline();
283		1	return;
284			}
285		23	connected_sessions_[session_id].first = id;
286		23	session->Accept(ws_key);
287		23	delegate_->StartSession(session_id, id);
288			}
289
290		55	void InspectorSocketServer::SessionTerminated(int session_id) {
291	✗✓	55	if (Session(session_id) == nullptr) {
292			return;
293			}
294		55	bool was_attached = connected_sessions_[session_id].first != "";
295	✓✓	55	if (was_attached) {
296		23	delegate_->EndSession(session_id);
297			}
298		55	connected_sessions_.erase(session_id);
299	✓✓	55	if (connected_sessions_.empty()) {
300	✓✓	21	if (was_attached && state_ == ServerState::kRunning
301	✓✓✓✗ ✓✓	71	&& !server_sockets_.empty()) {
302		9	PrintDebuggerReadyMessage(host_,
303		3	server_sockets_,
304		6	delegate_->GetTargetIds(),
305			"ending",
306		3	inspect_publish_uid_.console,
307			out_);
308			}
309	✓✓	50	if (state_ == ServerState::kStopped) {
310		20	delegate_.reset();
311			}
312			}
313			}
314
315		32	bool InspectorSocketServer::HandleGetRequest(int session_id,
316			const std::string& host,
317			const std::string& path) {
318		32	SocketSession* session = Session(session_id);
319		32	InspectorSocket* socket = session->ws_socket();
320	✓✓	32	if (!inspect_publish_uid_.http) {
321		1	SendHttpNotFound(socket);
322		1	return true;
323			}
324		31	const char* command = MatchPathSegment(path.c_str(), "/json");
325	✗✓	31	if (command == nullptr)
326			return false;
327
328	✓✓✓✓ ✓✓	31	if (MatchPathSegment(command, "list") \|\| command[0] == '\0') {
329		27	SendListResponse(socket, host, session);
330		27	return true;
331	✗✓	4	} else if (MatchPathSegment(command, "protocol")) {
332			SendProtocolJson(socket);
333			return true;
334	✓✓	4	} else if (MatchPathSegment(command, "version")) {
335		1	SendVersionResponse(socket);
336		1	return true;
337			}
338		3	return false;
339			}
340
341		27	void InspectorSocketServer::SendListResponse(InspectorSocket* socket,
342			const std::string& host,
343			SocketSession* session) {
344		27	std::vector<std::map<std::string, std::string>> response;
345	✓✓	48	for (const std::string& id : delegate_->GetTargetIds()) {
346		21	response.push_back(std::map<std::string, std::string>());
347		21	std::map<std::string, std::string>& target_map = response.back();
348		21	target_map["description"] = "node.js instance";
349		42	target_map["faviconUrl"] =
350		21	"https://nodejs.org/static/images/favicons/favicon.ico";
351		21	target_map["id"] = id;
352		21	target_map["title"] = delegate_->GetTargetTitle(id);
353		21	Escape(&target_map["title"]);
354		21	target_map["type"] = "node";
355			// This attribute value is a "best effort" URL that is passed as a JSON
356			// string. It is not guaranteed to resolve to a valid resource.
357		21	target_map["url"] = delegate_->GetTargetUrl(id);
358		21	Escape(&target_map["url"]);
359
360		42	std::string detected_host = host;
361	✗✓	21	if (detected_host.empty()) {
362			detected_host = FormatHostPort(socket->GetHost(),
363			session->server_port());
364			}
365		21	std::string formatted_address = FormatAddress(detected_host, id, false);
366		42	target_map["devtoolsFrontendUrl"] = GetFrontendURL(false,
367		21	formatted_address);
368			// The compat URL is for Chrome browsers older than 66.0.3345.0
369		42	target_map["devtoolsFrontendUrlCompat"] = GetFrontendURL(true,
370		21	formatted_address);
371		21	target_map["webSocketDebuggerUrl"] = FormatAddress(detected_host, id, true);
372			}
373		27	SendHttpResponse(socket, MapsToString(response), 200);
374		27	}
375
376		42	std::string InspectorSocketServer::GetFrontendURL(bool is_compat,
377			const std::string &formatted_address) {
378		84	std::ostringstream frontend_url;
379		42	frontend_url << "devtools://devtools/bundled/";
380	✓✓	42	frontend_url << (is_compat ? "inspector" : "js_app");
381		42	frontend_url << ".html?experiments=true&v8only=true&ws=";
382		42	frontend_url << formatted_address;
383		42	return frontend_url.str();
384			}
385
386		89	bool InspectorSocketServer::Start() {
387	✗✓	89	CHECK_NOT_NULL(delegate_);
388	✗✓	89	CHECK_EQ(state_, ServerState::kNew);
389		89	std::unique_ptr<SocketServerDelegate> delegate_holder;
390			// We will return it if startup is successful
391		89	delegate_.swap(delegate_holder);
392			struct addrinfo hints;
393		89	memset(&hints, 0, sizeof(hints));
394		89	hints.ai_flags = AI_NUMERICSERV;
395		89	hints.ai_socktype = SOCK_STREAM;
396			uv_getaddrinfo_t req;
397		178	const std::string port_string = std::to_string(port_);
398		89	int err = uv_getaddrinfo(loop_, &req, nullptr, host_.c_str(),
399			port_string.c_str(), &hints);
400	✗✓	89	if (err < 0) {
401			if (out_ != nullptr) {
402			fprintf(out_, "Unable to resolve \"%s\": %s\n", host_.c_str(),
403			uv_strerror(err));
404			}
405			return false;
406			}
407	✓✓	183	for (addrinfo* address = req.addrinfo; address != nullptr;
408		94	address = address->ai_next) {
409		188	auto server_socket = ServerSocketPtr(new ServerSocket(this));
410		94	err = server_socket->Listen(address->ai_addr, loop_);
411	✓✓	94	if (err == 0)
412		88	server_sockets_.push_back(std::move(server_socket));
413			}
414		89	uv_freeaddrinfo(req.addrinfo);
415
416			// We only show error if we failed to start server on all addresses. We only
417			// show one error, for the last address.
418	✓✓	89	if (server_sockets_.empty()) {
419	✓✓	3	if (out_ != nullptr) {
420		1	fprintf(out_, "Starting inspector on %s:%d failed: %s\n",
421			host_.c_str(), port_, uv_strerror(err));
422		1	fflush(out_);
423			}
424		3	return false;
425			}
426		86	delegate_.swap(delegate_holder);
427		86	state_ = ServerState::kRunning;
428		258	PrintDebuggerReadyMessage(host_,
429		86	server_sockets_,
430		172	delegate_->GetTargetIds(),
431			"listening",
432		86	inspect_publish_uid_.console,
433			out_);
434		86	return true;
435			}
436
437		99	void InspectorSocketServer::Stop() {
438	✓✓	99	if (state_ == ServerState::kStopped)
439		13	return;
440	✗✓	86	CHECK_EQ(state_, ServerState::kRunning);
441		86	state_ = ServerState::kStopped;
442		86	server_sockets_.clear();
443	✓✓	86	if (done())
444		66	delegate_.reset();
445			}
446
447		22	void InspectorSocketServer::TerminateConnections() {
448	✓✓	25	for (const auto& key_value : connected_sessions_)
449		3	key_value.second.second->Close();
450		22	}
451
452		24	bool InspectorSocketServer::TargetExists(const std::string& id) {
453		24	const std::vector<std::string>& target_ids = delegate_->GetTargetIds();
454		24	const auto& found = std::find(target_ids.begin(), target_ids.end(), id);
455		24	return found != target_ids.end();
456			}
457
458		90	int InspectorSocketServer::Port() const {
459	✓✗	90	if (!server_sockets_.empty()) {
460		90	return server_sockets_[0]->port();
461			}
462			return port_;
463			}
464
465		55	void InspectorSocketServer::Accept(int server_port,
466			uv_stream_t* server_socket) {
467			std::unique_ptr<SocketSession> session(
468		110	new SocketSession(this, next_session_id_++, server_port));
469
470			InspectorSocket::DelegatePointer delegate =
471			InspectorSocket::DelegatePointer(
472		110	new SocketSession::Delegate(this, session->id()));
473
474			InspectorSocket::Pointer inspector =
475		110	InspectorSocket::Accept(server_socket, std::move(delegate));
476	✓✗	55	if (inspector) {
477		55	session->Own(std::move(inspector));
478		55	connected_sessions_[session->id()].second = std::move(session);
479			}
480		55	}
481
482		2100	void InspectorSocketServer::Send(int session_id, const std::string& message) {
483		2100	SocketSession* session = Session(session_id);
484	✓✗	2100	if (session != nullptr) {
485		2100	session->Send(message);
486			}
487		2100	}
488
489		94	void InspectorSocketServer::CloseServerSocket(ServerSocket* server) {
490		94	server->Close();
491		94	}
492
493			// InspectorSession tracking
494		55	SocketSession::SocketSession(InspectorSocketServer* server, int id,
495		55	int server_port)
496		55	: id_(id), server_port_(server_port) {}
497
498		2100	void SocketSession::Send(const std::string& message) {
499		2100	ws_socket_->Write(message.data(), message.length());
500		2100	}
501
502		32	void SocketSession::Delegate::OnHttpGet(const std::string& host,
503			const std::string& path) {
504	✓✓	32	if (!server_->HandleGetRequest(session_id_, host, path))
505		3	Session()->ws_socket()->CancelHandshake();
506		32	}
507
508		24	void SocketSession::Delegate::OnSocketUpgrade(const std::string& host,
509			const std::string& path,
510			const std::string& ws_key) {
511	✗✓	48	std::string id = path.empty() ? path : path.substr(1);
512		24	server_->SessionStarted(session_id_, id, ws_key);
513		24	}
514
515		135	void SocketSession::Delegate::OnWsFrame(const std::vector<char>& data) {
516		135	server_->MessageReceived(session_id_,
517		270	std::string(data.data(), data.size()));
518		135	}
519
520			// ServerSocket implementation
521		88	int ServerSocket::DetectPort() {
522			sockaddr_storage addr;
523		88	int len = sizeof(addr);
524		88	int err = uv_tcp_getsockname(&tcp_socket_,
525			reinterpret_cast<struct sockaddr*>(&addr), &len);
526	✗✓	88	if (err != 0)
527			return err;
528			int port;
529	✓✓	88	if (addr.ss_family == AF_INET6)
530		7	port = reinterpret_cast<const sockaddr_in6*>(&addr)->sin6_port;
531			else
532		81	port = reinterpret_cast<const sockaddr_in*>(&addr)->sin_port;
533		88	port_ = ntohs(port);
534		88	return err;
535			}
536
537		94	int ServerSocket::Listen(sockaddr* addr, uv_loop_t* loop) {
538		94	uv_tcp_t* server = &tcp_socket_;
539	✗✓	94	CHECK_EQ(0, uv_tcp_init(loop, server));
540		94	int err = uv_tcp_bind(server, addr, 0);
541	✓✓	94	if (err == 0) {
542			// 511 is the value used by a 'net' module by default
543		90	err = uv_listen(reinterpret_cast<uv_stream_t*>(server), 511,
544			ServerSocket::SocketConnectedCallback);
545			}
546	✓✓	94	if (err == 0) {
547		88	err = DetectPort();
548			}
549		94	return err;
550			}
551
552			// static
553		55	void ServerSocket::SocketConnectedCallback(uv_stream_t* tcp_socket,
554			int status) {
555	✓✗	55	if (status == 0) {
556		55	ServerSocket* server_socket = ServerSocket::FromTcpSocket(tcp_socket);
557			// Memory is freed when the socket closes.
558		55	server_socket->server_->Accept(server_socket->port_, tcp_socket);
559			}
560		55	}
561			} // namespace inspector
562			} // namespace node