20165220 实验三《并发程序》

实验三-并发程序-1

学习使用Linux命令wc(1)
基于Linux Socket程序设计实现wc（1）服务器(端口号是你学号的后6位)和客户端
客户端传一个文本文件给服务器
服务器返加文本文件中的单词数

实验结果：



实验代码：

客户端
#include<netinet/in.h>  // sockaddr_in 
#include<sys/types.h>  // socket 
#include<sys/socket.h>  // socket 
#include<stdio.h>    // printf 
#include<stdlib.h>    // exit 
#include<string.h>    // bzero 
  
#define SERVER_PORT 165220 
#define BUFFER_SIZE 1024 
#define FILE_NAME_MAX_SIZE 512 
  
int main() 
{ 
  // 声明并初始化一个客户端的socket地址结构 
  struct sockaddr_in client_addr; 
  bzero(&client_addr, sizeof(client_addr)); 
  client_addr.sin_family = AF_INET; 
  client_addr.sin_addr.s_addr = htons(INADDR_ANY); 
  client_addr.sin_port = htons(0); 
  
  // 创建socket，若成功，返回socket描述符 
  int client_socket_fd = socket(AF_INET, SOCK_STREAM, 0); 
  if(client_socket_fd < 0) 
  { 
    perror("Create Socket Failed:"); 
    exit(1); 
  } 
  
  // 绑定客户端的socket和客户端的socket地址结构 非必需 
  if(-1 == (bind(client_socket_fd, (struct sockaddr*)&client_addr, sizeof(client_addr)))) 
  { 
    perror("Client Bind Failed:"); 
    exit(1); 
  } 
  
  // 声明一个服务器端的socket地址结构，并用服务器那边的IP地址及端口对其进行初始化，用于后面的连接 
  struct sockaddr_in server_addr; 
  bzero(&server_addr, sizeof(server_addr)); 
  server_addr.sin_family = AF_INET; 
  if(inet_pton(AF_INET, "127.0.0.1", &server_addr.sin_addr) == 0) 
  { 
    perror("Server IP Address Error:"); 
    exit(1); 
  } 
  server_addr.sin_port = htons(SERVER_PORT); 
  socklen_t server_addr_length = sizeof(server_addr); 
  
  // 向服务器发起连接，连接成功后client_socket_fd代表了客户端和服务器的一个socket连接 
  if(connect(client_socket_fd, (struct sockaddr*)&server_addr, server_addr_length) < 0) 
  { 
    perror("Can Not Connect To Server IP:"); 
    exit(0); 
  } 
  
  // 输入文件名 并放到缓冲区buffer中等待发送 
  char file_name[FILE_NAME_MAX_SIZE+1]; 
  bzero(file_name, FILE_NAME_MAX_SIZE+1); 
  printf("Please Input File Name On Server:	"); 
  scanf("%s", file_name); 
  
  char buffer[BUFFER_SIZE]; 
  bzero(buffer, BUFFER_SIZE); 
  strncpy(buffer, file_name, strlen(file_name)>BUFFER_SIZE?BUFFER_SIZE:strlen(file_name)); 
    
  // 向服务器发送buffer中的数据 
  if(send(client_socket_fd, buffer, BUFFER_SIZE, 0) < 0) 
  { 
    perror("Send File Name Failed:"); 
    exit(1); 
  } 
  
  // 打开文件，准备写入 
  FILE *fp = fopen(file_name, "w"); 
  if(NULL == fp) 
  { 
    printf("File:	%s Can Not Open To Write
", file_name); 
    exit(1); 
  } 
  
  // 从服务器接收数据到buffer中 
  // 每接收一段数据，便将其写入文件中，循环直到文件接收完并写完为止 
  bzero(buffer, BUFFER_SIZE); 
  int length = 0; 
  while((length = recv(client_socket_fd, buffer, BUFFER_SIZE, 0)) > 0) 
  { 
    if(fwrite(buffer, sizeof(char), length, fp) < length) 
    { 
      printf("File:	%s Write Failed
", file_name); 
      break; 
    } 
    bzero(buffer, BUFFER_SIZE); 
  } 
  
  // 接收成功后，关闭文件，关闭socket 
  printf("Receive File:	%s From Server IP Successful!
", file_name); 
  close(fp); 
  close(client_socket_fd);
  char *argv[]={"wc","-w",file_name,0};
  execvp("wc",argv);
  return 0; 
} 


服务器
#include<netinet/in.h> // sockaddr_in 
#include<sys/types.h>  // socket 
#include<sys/socket.h> // socket 
#include<stdio.h>    // printf 
#include<stdlib.h>   // exit 
#include<string.h>   // bzero 
  
#define SERVER_PORT 165220 
#define LENGTH_OF_LISTEN_QUEUE 20 
#define BUFFER_SIZE 1024 
#define FILE_NAME_MAX_SIZE 512 
  
int main(void) 
{ 
  // 声明并初始化一个服务器端的socket地址结构 
  struct sockaddr_in server_addr; 
  bzero(&server_addr, sizeof(server_addr)); 
  server_addr.sin_family = AF_INET; 
  server_addr.sin_addr.s_addr = htons(INADDR_ANY); 
  server_addr.sin_port = htons(SERVER_PORT); 
  
  // 创建socket，若成功，返回socket描述符 
  int server_socket_fd = socket(PF_INET, SOCK_STREAM, 0); 
  if(server_socket_fd < 0) 
  { 
    perror("Create Socket Failed:"); 
    exit(1); 
  } 
  int opt = 1; 
  setsockopt(server_socket_fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)); 
  
  // 绑定socket和socket地址结构 
  if(-1 == (bind(server_socket_fd, (struct sockaddr*)&server_addr, sizeof(server_addr)))) 
  { 
    perror("Server Bind Failed:"); 
    exit(1); 
  } 
    
  // socket监听 
  if(-1 == (listen(server_socket_fd, LENGTH_OF_LISTEN_QUEUE))) 
  { 
    perror("Server Listen Failed:"); 
    exit(1); 
  } 
  
  while(1) 
  { 
    // 定义客户端的socket地址结构 
    struct sockaddr_in client_addr; 
    socklen_t client_addr_length = sizeof(client_addr); 
  
    // 接受连接请求，返回一个新的socket(描述符)，这个新socket用于同连接的客户端通信 
    // accept函数会把连接到的客户端信息写到client_addr中 
    int new_server_socket_fd = accept(server_socket_fd, (struct sockaddr*)&client_addr, &client_addr_length); 
    if(new_server_socket_fd < 0) 
    { 
      perror("Server Accept Failed:"); 
      break; 
    } 
  
    // recv函数接收数据到缓冲区buffer中 
    char buffer[BUFFER_SIZE]; 
    bzero(buffer, BUFFER_SIZE); 
    if(recv(new_server_socket_fd, buffer, BUFFER_SIZE, 0) < 0) 
    { 
      perror("Server Recieve Data Failed:"); 
      break; 
    } 
  
    // 然后从buffer(缓冲区)拷贝到file_name中 
    char file_name[FILE_NAME_MAX_SIZE+1]; 
    bzero(file_name, FILE_NAME_MAX_SIZE+1); 
    strncpy(file_name, buffer, strlen(buffer)>FILE_NAME_MAX_SIZE?FILE_NAME_MAX_SIZE:strlen(buffer)); 
    printf("%s
", file_name); 
  
    // 打开文件并读取文件数据 
    FILE *fp = fopen(file_name, "r"); 
    if(NULL == fp) 
    { 
      printf("File:%s Not Found
", file_name); 
    } 
    else
    { 
      bzero(buffer, BUFFER_SIZE); 
      int length = 0; 
      // 每读取一段数据，便将其发送给客户端，循环直到文件读完为止 
      while((length = fread(buffer, sizeof(char), BUFFER_SIZE, fp)) > 0) 
      { 
        if(send(new_server_socket_fd, buffer, length, 0) < 0) 
        { 
          printf("Send File:%s Failed./n", file_name); 
          break; 
        } 
        bzero(buffer, BUFFER_SIZE); 
      } 
  
      // 关闭文件 
      fclose(fp); 
      printf("File:%s Transfer Successful!
", file_name); 
    } 
    // 关闭与客户端的连接 
    close(new_server_socket_fd); 
  } 
  // 关闭监听用的socket 
  close(server_socket_fd); 
  return 0; 
}

实验三-并发程序-2

使用多线程实现wc服务器并使用同步互斥机制保证计数正确
上方提交代码
下方提交测试
对比单线程版本的性能，并分析原因

实验结果：

实验代码：

服务器：
#include<netinet/in.h>   
#include<sys/types.h>   
#include<sys/socket.h>   
#include<stdio.h>   
#include<stdlib.h>   
#include<string.h>   
#include<pthread.h>  
/*
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
*/
#define HELLO_WORLD_SERVER_PORT    165220

#define LENGTH_OF_LISTEN_QUEUE     20  
#define BUFFER_SIZE                1024  
#define FILE_NAME_MAX_SIZE         512  
void *process_client(void *new_server_socket);
int mywc(char file_name[])
{
    char ch;
    int flag=0,num=0;
    int choose;
    FILE *fp;
    printf("统计单词个数还是实现“wc -w”?(1or2)
");
    scanf("%d",&choose);
    if((fp = fopen(file_name,"r"))==NULL)
    {
        printf("Failure to open %s
",file_name);
        exit(0);
    }

    if(choose==1)
    {
    while((ch=fgetc(fp))!=EOF)
    {
        if(ch==' ' || ch=='
' || ch=='	' ||  ch=='!' || ch=='?' || ch=='"' || ch=='.' || ch== '\,' || ch==':' || ch=='(' || ch==')' || ch==';' || ch=='-')
        {
            flag=0;
        }
        else
        {
            if(flag==0)
            {
                flag=1;
                num++;
            }

        }
                   
    }

    }
    else if(choose==2)
    {
        while((ch=fgetc(fp))!=EOF)
        {
            if(ch==' ' || ch=='
' || ch=='	' || ch=='
')
                flag=0;
            else
            {
                if(flag==0)
                {
                    flag=1;
                    num++;
                }
            }
        }
    }
    printf("单词个数为：%d
",num);
    fclose(fp);
    return num;
}
int main(int argc, char **argv)  
{  
// set socket's address information   
// 设置一个socket地址结构server_addr,代表服务器internet的地址和端口  
    struct sockaddr_in   server_addr;  
    bzero(&server_addr, sizeof(server_addr));  
    server_addr.sin_family = AF_INET;  
    server_addr.sin_addr.s_addr = htons(INADDR_ANY);  
    server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);  
// create a stream socket   
// 创建用于internet的流协议(TCP)socket，用server_socket代表服务器向客户端提供服务的接口  
    int server_socket = socket(PF_INET, SOCK_STREAM, 0);  
    if (server_socket < 0)  
    {  
        printf("Create Socket Failed!
");  
        exit(1);  
    }  

// 把socket和socket地址结构绑定   
    if (bind(server_socket, (struct sockaddr*)&server_addr, sizeof(server_addr)))  
    {  
        printf("Server Bind Port: %d Failed!
", HELLO_WORLD_SERVER_PORT);  
        exit(1);  
    }  

// server_socket用于监听   
    if (listen(server_socket, LENGTH_OF_LISTEN_QUEUE))  
    {  
        printf("Server Listen Failed!
");  
        exit(1);  
    }  
// 服务器端一直运行用以持续为客户端提供服务   
      
    while(1)
    {
// 定义客户端的socket地址结构client_addr，当收到来自客户端的请求后，调用accept  
// 接受此请求，同时将client端的地址和端口等信息写入client_addr中  
        struct sockaddr_in client_addr;  
        socklen_t length = sizeof(client_addr);  

// 接受一个从client端到达server端的连接请求,将客户端的信息保存在client_addr中  
// 如果没有连接请求，则一直等待直到有连接请求为止，这是accept函数的特性，可以  
// 用select()来实现超时检测   
// accpet返回一个新的socket,这个socket用来与此次连接到server的client进行通信  
// 这里的new_server_socket代表了这个通信通道  
        int new_server_socket = accept(server_socket, (struct sockaddr*)&client_addr, &length);  
        printf("连接到客户端
");
        if (new_server_socket < 0)  
        {  
            printf("Server Accept Failed!
");  
              
        }
        //添加进程相关代码
        pthread_t pid;
        if(pthread_create(&pid, NULL, process_client,(void *) &new_server_socket) < 0){
              printf("pthread_create error
");
        }
        
    }
//  close(server_socket);
}
void *process_client(void *new_server_socket)
{
        int sockid=*(int *)new_server_socket;
        FILE *fp;
        //接受来自客户端的文件
        char buffer[BUFFER_SIZE]; 
        char file_name[FILE_NAME_MAX_SIZE];
        bzero(buffer, sizeof(buffer));  
        int length=0;
        if(recv(sockid,buffer,BUFFER_SIZE, 0)==-1)
        {
            printf("接受文件名%s失败
",buffer);
        }
        strcpy(file_name,buffer);
        strcat(file_name,"-server");
        if((fp = fopen(file_name,"w"))==NULL)
        {
            printf("Failure to open %s
",file_name);
            exit(0);
        }
        while( length = recv(sockid, buffer, BUFFER_SIZE, 0))
        {
            if(length<0)
            {
                printf("接受文件出错
");
                exit(0);
            }
            
            if(fwrite(buffer,sizeof(char),length,fp)<length)
            {
                printf("写文件失败
");
            }
            bzero(buffer, BUFFER_SIZE);
        }
        fclose(fp);
        printf("接受文件完毕
");
        int number=0;
        number=mywc(file_name);
        bzero(buffer, BUFFER_SIZE);  
        buffer[0]=number+48;
// 发送buffer中的字符串到new_server_socket,实际上就是发送给客户端  
        /*if (send(new_server_socket, buffer, sizeof(buffer), 0) < 0)  
        {  
            printf("Send number Failed!
");  
             
        }  
        printf("发送单词个数完毕
");*/
        bzero(buffer, sizeof(buffer));  
        
//      fclose(fp);  
        printf("File Transfer Finished!
");    
        close(new_server_socket);  
}

客户端：
#include<netinet/in.h>                         // for sockaddr_in  
#include<sys/types.h>                          // for socket  
#include<sys/socket.h>                         // for socket  
#include<stdio.h>                              // for printf  
#include<stdlib.h>                             // for exit  
#include<string.h>                             // for bzero  
  /*
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
*/
#define HELLO_WORLD_SERVER_PORT       165220
#define BUFFER_SIZE                   1024  
#define FILE_NAME_MAX_SIZE            512  
int mywc(char file_name[],int choose);
int main(int argc, char **argv)  
{  
    FILE *fp;
    if (argc != 2)  
    {  
        printf("Usage: ./%s ServerIPAddress
", argv[0]);  
        exit(1);  
    }  

// 设置一个socket地址结构client_addr, 代表客户机的internet地址和端口  
    struct sockaddr_in client_addr;  
    bzero(&client_addr, sizeof(client_addr));  
    client_addr.sin_family = AF_INET; // internet协议族  
    client_addr.sin_addr.s_addr = htons(INADDR_ANY); // INADDR_ANY表示自动获取本机地址  
    client_addr.sin_port = htons(0); // auto allocated, 让系统自动分配一个空闲端口  

// 创建用于internet的流协议(TCP)类型socket，用client_socket代表客户端socket  
    int client_socket = socket(AF_INET, SOCK_STREAM, 0);  
    if (client_socket < 0)  
    {  
        printf("Create Socket Failed!
");  
        exit(1);  
    }  

// 把客户端的socket和客户端的socket地址结构绑定   
    if (bind(client_socket, (struct sockaddr*)&client_addr, sizeof(client_addr)))  
    {  
        printf("Client Bind Port Failed!
");  
        exit(1);  
    }  

// 设置一个socket地址结构server_addr,代表服务器的internet地址和端口  
    struct sockaddr_in  server_addr;  
    bzero(&server_addr, sizeof(server_addr));  
    server_addr.sin_family = AF_INET;  

// 服务器的IP地址来自程序的参数   
    if (inet_aton(argv[1], &server_addr.sin_addr) == 0)  
    {  
        printf("Server IP Address Error!
");  
        exit(1);  
    }                                                                                                               
    server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);  
    socklen_t server_addr_length = sizeof(server_addr);  
    // 向服务器发起连接请求，连接成功后client_socket代表客户端和服务器端的一个socket连接  
    if (connect(client_socket, (struct sockaddr*)&server_addr, server_addr_length) < 0)  
    {  
        printf("Can Not Connect To %s!
", argv[1]);  
        exit(1);  
    }  

    char file_name[FILE_NAME_MAX_SIZE + 1];  
    bzero(file_name, sizeof(file_name));  
    printf("Please Input File Name.	");  
    scanf("%s", file_name);  
    if((fp = fopen(file_name,"r"))==NULL)
    {
         printf("Failure to open %s
",file_name);
         exit(0);
    }
    
    char buffer[BUFFER_SIZE];  
    bzero(buffer, sizeof(buffer));  
    strcpy(buffer,file_name);
    if(send(client_socket,buffer,BUFFER_SIZE,0)==-1)
    {
        printf("发送文件名失败
");
    }
    char ch;
    int i=0;
    while((ch=fgetc(fp))!=EOF)
    {
        buffer[i++]=ch;
        if(i>=BUFFER_SIZE)
        {
            if((send(client_socket, buffer, BUFFER_SIZE, 0))==-1)
            {
                printf("发送文件失败
");
            }
            bzero(buffer, sizeof(buffer));
            i=0;
        }
    }
    if(i<BUFFER_SIZE)
    {
        if((send(client_socket, buffer, i, 0))==-1)
        {
            printf("发送文件失败
");
        }
    }
    printf("发送%s完毕
",file_name);
    mywc(file_name,1);
     mywc(file_name,2);
    // 向服务器发送buffer中的数据，此时buffer中存放的是客户端需要接收的文件 
    //以下接收服务器发来的单词个数
    bzero(buffer, sizeof(buffer));
//  int length = 0;  
/*  int length = recv(client_socket, buffer, sizeof(buffer), 0);
      
        if (length < 0)  
        {  
            printf("Recieve Data From Server %s Failed!
", argv[1]);   
        }  
        else
        {
        printf("Recieve words number %c From Server[%s] Finished!
",buffer[0],argv[1]);

        }
        bzero(buffer, BUFFER_SIZE);  */
// 传输完毕，关闭socket   
    
    fclose(fp);  
    close(client_socket);  
    return 0;  

}  
 int mywc(char file_name[],int choose)
  {
       FILE *fp;
       char ch;
        int flag=0,num=0;
        // int choose;
        //  printf("统计单词个数还是实现“wc -w”?(1or2)
");
          // scanf("%d",&choose);
            if((fp = fopen(file_name,"r"))==NULL)
             {
                  printf("Failure to open %s
",file_name);
                   exit(0);
                }
             
                  if(choose==1)
                   {
                    while((ch=fgetc(fp))!=EOF)
                     {
                          if(ch==' ' || ch=='
' || ch=='	' ||  ch=='!' || ch=='?' || ch=='"' || ch=='.' || ch== '\,' || ch==':' || ch=='(' || ch==')' || ch==';'     || ch=='-')
                          {
                          flag=0;
                          }
                          else
                          {
                          if(flag==0)
                          {
                          flag=1;
                          num++;
                          }
                          
                          }

                    }

                }
                else if(choose==2)
                {
                    while((ch=fgetc(fp))!=EOF)
                    {
                        if(ch==' ' || ch=='
' || ch=='	' || ch=='
')
                        flag=0;
                        else
                        {
                            if(flag==0)
                            {
                                flag=1;
                                num++;
                            }
                        }
                    }
                }
                printf("单词个数为：%d_用方式%d计算
",num,choose);
                fclose(fp);
                return num;
}

实验体会：

本次实验让我清楚的了解到了wc命令，也学到了一些关于线程的操作，更是能比较出单线程跟多线程的区别以及优缺点，收获很大。