libsockets下載 - libsockets原始碼下載

libsockets（正在進行中！！！）

一個獨立於平台的 C++ 套接字庫，具有透明的 SSL 支援（以及更多內容）。

在此處取得：[支援 SSL 的 Windows x64 靜態和共用程式庫] 或 [不支援 SSL]

範例

襪子::ClientSocket 和襪子::ServerSocket

# include " libsockets.h "

void client () {
  socks::ClientSocket clientSocket;

  if (clientSocket. connectTo ( " 127.0.0.1 " , " 10000 " ) == 0 ) {
    std::string hello = " Hello World " ;
    clientSocket. sendData (hello. c_str (), hello. size ());
  }
};

int main () {
  client ();
};

# include " libsockets.h "

void server () {
  socks::ServerSocket serverSocket;
  
  serverSocket. listenForConnections ( " 127.0.0.1 " , " 10000 " );
  socks::ClientSocket clientSocket = serverSocket. acceptConnection ();
  
  char buf[ 512 ];
  auto len = clientSocket. receiveData (buf, 512 );
  if (len > 0 ) {
    buf[len]= 0 ;
    std::cout << buf << std::endl;
  }
};

int main () {
  server ();
};

$ > ./server &
$ > ./client

襪子::伺服器（ `socks::makeThreaded[SSL]Server`和`socks::makeMultiplexed[SSL]Server` ）

# include " libsockets.h "

class MyContext {
public:
  int value; // whatever context you need to maintain
};

void onReceive (socks::Context<MyContext> &context, std::istream &inp, std::ostream &outp) {
  std::string word;

  while (inp >> word)
    outp << context. getContext (). value ++ << " " << word << std::endl;
};

void onConnect (socks::Context<MyContext> &context, std::istream &inp, std::ostream &outp) {
  context. getContext (). value = 0 ;
  outp << " Hello " << std::endl;
};

int main () {
  auto myServer = socks::factory::makeThreadedServer<MyContext>(
    onReceive,
    onConnect /* ,
    onDisconnect,
    afterWrite
    */
    ); // onReceive is mandatory, onConnect, onDisconnect & afterWrite are optional
    
  myServer. listen ( " 127.0.0.1 " , " 10000 " ); // serves
};

您可以將socks::factory::makeThreadedServer替換為socks::factory::makeMultiplexedServer 。第一個實例化一個伺服器，為每個客戶端建立一個執行緒（使用阻塞I/O），第二個實例化一個伺服器，該伺服器具有更具可擴展性的架構，使用反應器模式（使用非阻塞I/O，每個執行緒為多個客戶端提供服務）。

襪子::DatagramSocket

# include " libsockets.h "

constexpr size_t bufferSize = 4096 ;

int main () {
  socks::DatagramSocket datagramSocket;

  datagramSocket. bindSocket ( " 0.0.0.0 " , " 10000 " );
  char buffer[bufferSize];

  std::pair< int , socks::SocketAddress> ret = datagramSocket. receiveFrom (buffer, bufferSize);
  // ret = pair<bytes received, sender address>
  if (ret. first > 0 ) {
    auto peer = std::move (ret. second );
    std::string reply = " received " + std::to_string (ret. first ) + " bytes " ;
    datagramSocket. sendTo (peer, reply. c_str (), reply. size ());
  } else {
    std::cerr << " error receiving. " << std::endl;
  }
}

您也可以將socks::DatagramSocket轉換為「已連接」資料報套接字並使用socks::ClientSocket的介面。

socks::ClientSocket clientSocket = datagramSocket.makeClientSocket(peer); 
/* 
 * from this point on 'datagramSocket' cannot be used anymore,
 * its implementation has been moved to 'clientSocket'.
 */

或者

socks::ClientSocket clientSocket = datagramSocket.makeClientSocket(host, port); // same here

襪子::SocketStream

它是一個封裝在std::iostream類別中的socks::ClientSocket 。

# include " libsockets.h "

int main () {
  socks::SocketStream socketStream;

  if (socketStream. connectTo ( " 127.0.0.1 " , " 10000 " ) == 0 ) {
    std::string buf;

    std::getline (socketStream, buf); // receiving data
    std::cout << buf << std::endl;
    socketStream << " message received. " << std::endl; // transmitting data
  } else {
    std::cerr << " error connecting. " << std::endl;
  }
}

SSL 支援

只需替換聲明：

socks::ClientSocket clientSocket = socks::factory::makeSSLClientSocket;
socks::ServerSocket serverSocket = socks::factory::makeSSLServerSocket;
socks::SocketStream socketStream = socks::factory::makeSSLSocketStream;
socks::Server server = socks::factory::makeThreadedSSLServer<...>(...);
socks::Server server = socks::factory::makeMultiplexedSSLServer<...>(...);

就是這樣。對於socks::ServerSocket和socks::Server您還需要憑證和金鑰檔案（預設名稱為“cert.pem”和“key.pem”）。產生測試證書和密鑰檔案：

openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -days 365 -nodes

襪子::工廠

此命名空間包含所有庫的工廠方法。

FTP 伺服器 (ftpd/)

一個更詳細的範例：使用 libsockets 的簡單但功能齊全的 FTP 伺服器實作（包括 SSL 支援、被動模式、復原和 FXP 支援）。為使用者提供身份驗證回呼。您也可以註冊自訂 SITE 命令。

您可以嘗試一下：Windows x64 靜態二進位文件

AuthenticationFunction FTPClientInfo::authenticate =
[]( const std::string &username, const std::string &password, FTPClientInfo& clientInfo) {
  /*
   * in here a user profile can be loaded into 'clientInfo'
   * upon authentication in order to define, for example,
   * a home dir, chroot, etc.
   */
  return authService. authenticate (username, password);
};

int main ( int argc, char **argv) {
  FTPServer ftpServer;

  // SITE CLIENT COUNT
  ftpServer. registerSiteCommand (
    " CLIENT " , 
    [&ftpServer]( const std::string &params, FTPClientInfo &clientInfo) {
      std::stringstream ss (params);
      std::string p1;
      ss >> p1;
      std::transform (p1. begin (), p1. end (), p1. begin (), ::toupper);
      if (p1 == " COUNT " )
        return " 200 There is/are " + std::to_string (ftpServer. getClientCount ()) + " client(s) online. " ;
      else
        return std::string ( " 501 Invalid SITE CLIENT parameter. " );
  });

  ftpServer. start ();
}