win7系统两台电脑之间利用Socket实现文件传输---C++实现

悠悠 2022-05-24 01:52 340阅读 0赞

参考：[http://www.jb51.net/article/53732.htm][http_www.jb51.net_article_53732.htm]

本博客主要实现了简单**win7系统**下，两台电脑之间(客户机与服务器)的文件传输，主要是基于Windows网络编程中winsock来实现的，当然这个只是简单的实现，你可以根据你的需求在你的项目里面进行更改。这里主要实现的通过客户机(Client) 通过监听服务器（Server）的需求进而向服务器传输指定文件。

操作步骤：

(1) 首先打开你的cmd控制台，查看你的端口号，输入命令：netstat -ano，如下图所示，TCP后面红色矩形框就是你部分的端口号。在client.cpp和server.cpp这两个文件中将“\#define PORT  1029“改为你的可用端口号，比如“\#define PORT  8128“，其中8128就是你某个可用端口号**。**

**                     ![20180518101606604][]**

**   **   (2) 如果你在同一台电脑上面进行模拟，是不用更改IP的，当然如果是两台电脑，这里就需要更改你的client.cpp和server.cpp这两个文件中\#define SERVER\_IP“127.0.0.1”，更改为你的Server服务器IP地址，查看你IP地址的方法为：打开你的打开你的cmd控制台，输入命令：ipconfig

![20180518102948904][]

(3) 然后新建两个工程即可，分别添加下面两个源文件，先运行客户端代码，然后运行服务器代码，输入想要接收客户端的文件名，就可以在你的服务器工程下接收到相应的文件。

**服务器代码：**

**server.cpp**

/************************************************************************* 
      > File Name: Win_Server.c 
      > Author: SongLee 
     ************************************************************************/ 
     
    #include <stdio.h> 
    #include <stdlib.h> 
    #include <string.h> 
    #include <WinSock2.h> 
     
    //#define PORT 8082 
    #define PORT 1029   //需要更改你可用的端口
    #define SERVER_IP "127.0.0.1" 
    #define BUFFER_SIZE 1024 
    #define FILE_NAME_MAX_SIZE 512 
    #pragma comment(lib, "WS2_32") 
     
    int main() 
    { 
      // 声明并初始化一个服务端(本地)的地址结构 
      sockaddr_in server_addr; 
      server_addr.sin_family = AF_INET; 
      server_addr.sin_addr.S_un.S_addr = INADDR_ANY; 
      server_addr.sin_port = htons(PORT); 
     
      // 初始化socket dll 
      WSADATA wsaData; 
      WORD socketVersion = MAKEWORD(2, 0); 
      if(WSAStartup(socketVersion, &wsaData) != 0) 
      { 
        printf("Init socket dll error!"); 
        exit(1); 
      } 
     
      // 创建socket 
      SOCKET m_Socket = socket(AF_INET, SOCK_STREAM, 0); 
        if (SOCKET_ERROR == m_Socket) 
        { 
          printf("Create Socket Error!"); 
        exit(1); 
        } 
     
      //绑定socket和服务端(本地)地址 
      if (SOCKET_ERROR == bind(m_Socket, (LPSOCKADDR)&server_addr, sizeof(server_addr))) 
      { 
        printf("Server Bind Failed: %d", WSAGetLastError()); 
        exit(1); 
      } 
     
      //监听 
      if (SOCKET_ERROR == listen(m_Socket, 10)) 
      { 
        printf("Server Listen Failed: %d", WSAGetLastError()); 
        exit(1); 
      } 
     
     
      while(1) 
      { 
        printf("Listening To Server...\n");    //监听服务器需求
     
        sockaddr_in client_addr; 
        int client_addr_len = sizeof(client_addr); 
     
        SOCKET m_New_Socket = accept(m_Socket, (sockaddr *)&client_addr, &client_addr_len); 
        if (SOCKET_ERROR == m_New_Socket) 
        { 
          printf("Server Accept Failed: %d", WSAGetLastError()); 
          break; 
        } 
     
     char buffer[BUFFER_SIZE]; 
     memset(buffer, 0, BUFFER_SIZE); 
        if (recv(m_New_Socket, buffer, BUFFER_SIZE, 0) < 0) 
        { 
          printf("Client Receive Data Failed!"); 
          break; 
        } 
     
        char file_name[FILE_NAME_MAX_SIZE+1]; 
        memset(file_name, 0, FILE_NAME_MAX_SIZE+1); 
        strncpy(file_name, buffer, strlen(buffer)>FILE_NAME_MAX_SIZE ? FILE_NAME_MAX_SIZE:strlen(buffer)); 
        printf("%s\n", file_name); 
     
        FILE * fp = fopen(file_name, "rb"); //windows下是"rb",表示打开一个只读的二进制文件 
        if (NULL == fp) 
        { 
          printf("File: %s Not Found\n", file_name); 
        } 
            else 
        { 
          memset(buffer, 0, BUFFER_SIZE); 
          int length = 0; 
     
          while ((length = fread(buffer, sizeof(char), BUFFER_SIZE, fp)) > 0) 
          { 
            if (send(m_New_Socket, buffer, length, 0) < 0) 
            { 
              printf("Send File: %s Failed\n", file_name); 
              break; 
            } 
            memset(buffer, 0, BUFFER_SIZE); 
          } 
     
          fclose(fp); 
          printf("File: %s Transfer Successful!\n", file_name); 
        } 
        closesocket(m_New_Socket); 
      } 
     
      closesocket(m_Socket); 
      //释放winsock库 
      WSACleanup(); 
      return 0; 
    }

客户机代码：

**client.cpp**

/************************************************************************* 
      > File Name: Win_Client.c 
      > Author: SongLee 
     ************************************************************************/ 
     
    #include <stdio.h> 
    #include <stdlib.h> 
    #include <string.h> 
    #include <WinSock2.h> 
     
    //#define PORT 8082 
    #define PORT 1029    //需要更改你可用的端口
    #define SERVER_IP "127.0.0.1" 
    #define BUFFER_SIZE 1024 
    #define FILE_NAME_MAX_SIZE 512 
    #pragma comment(lib, "WS2_32") 
     
    int main() 
    { 
      // 初始化socket dll 
      WSADATA wsaData; 
      WORD socketVersion = MAKEWORD(2, 0); 
      if(WSAStartup(socketVersion, &wsaData) != 0) 
      { 
        printf("Init socket dll error!"); 
        exit(1); 
      } 
     
      while(1){
    	  //创建socket 
    	  SOCKET c_Socket = socket(AF_INET, SOCK_STREAM, 0); 
    	  if (SOCKET_ERROR == c_Socket) 
    	  { 
    		  printf("Create Socket Error!"); 
    		  system("pause"); 
    		  exit(1); 
    	  } 
    
    	  //指定服务端的地址 
    	  sockaddr_in server_addr; 
    	  server_addr.sin_family = AF_INET; 
    	  server_addr.sin_addr.S_un.S_addr = inet_addr(SERVER_IP); 
    	  server_addr.sin_port = htons(PORT); 
    
    	  if (SOCKET_ERROR == connect(c_Socket, (LPSOCKADDR)&server_addr, sizeof(server_addr))) 
    	  { 
    		  printf("Can Not Connect To Client IP!\n"); 
    		  system("pause"); 
    		  exit(1); 
    	  } 
    	  //输入文件名 
    	  char file_name[FILE_NAME_MAX_SIZE+1]; 
    	  memset(file_name, 0, FILE_NAME_MAX_SIZE+1); 
    	  printf("Please Input File Name On Client: "); 
    
    	  scanf("%s", &file_name); 
    
    	  char buffer[BUFFER_SIZE]; 
    	  memset(buffer, 0, BUFFER_SIZE); 
    	  strncpy(buffer, file_name, strlen(file_name)>BUFFER_SIZE ? BUFFER_SIZE:strlen(file_name)); 
    
    	  //向服务器发送文件名 
    	  if(send(c_Socket, buffer, BUFFER_SIZE, 0) < 0) 
    	  { 
    		  printf("Send File Name Failed\n"); 
    		  system("pause"); 
    		  exit(1); 
    	  } 
    
    	  //打开文件，准备写入 
    	  FILE * fp = fopen(file_name, "wb"); //windows下是"wb",表示打开一个只写的二进制文件 
    	  if(NULL == fp) 
    	  { 
    		  printf("File: %s Can Not Open To Write\n", file_name); 
    		  system("pause"); 
    		  exit(1); 
    	  } 
    	  else 
    	  { 
    		  memset(buffer, 0, BUFFER_SIZE); 
    		  int length = 0; 
    		  while ((length = recv(c_Socket, buffer, BUFFER_SIZE, 0)) > 0) 
    		  { 
    			  if (fwrite(buffer, sizeof(char), length, fp) < length) 
    			  { 
    				  printf("File: %s Write Failed\n", file_name); 
    				  break; 
    			  } 
    			  memset(buffer, 0, BUFFER_SIZE); 
    		  } 
    
    		  printf("Receive File: %s From Client Successful!\n", file_name); 
    	  } 
    
    	  fclose(fp);
     
          closesocket(c_Socket); 
        }
       
      //释放winsock库 
      WSACleanup(); 
     
      system("pause"); 
      return 0; 
    }

[http_www.jb51.net_article_53732.htm]: http://www.jb51.net/article/53732.htm
[20180518101606604]: /images/20220524/8aa60aacb9f74148849f45ecc8eedabe.png
[20180518102948904]: /images/20220524/0b8e34c1a78f45db9272c818e8452192.png