2018-2019-1 20165232 实验三

2018-2019-1 20165232 实验三 并发程序

并发程序-1

实验要求

• 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

实验步骤

• 用==man wc==命令学习==wc==命令的使用

1. wc指令功能：统计指定文件中的字节数、字数、行数，并将统计结果显示输出。
2. wc指令格式：wc [选项] 文件...
   wc指令描述：其中word字长是由空格分隔的非零长度序列。
3. wc命令参数：

• c 统计字节数。
• l 统计行数。
• m 统计字符数。这个标志不能与 -c 标志一起使用。
• w 统计字数。一个字被定义为由空白、跳格或换行字符分隔的字符串。
• L 打印最长行的长度。

本题代码

server.c:

#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 165232  
#define LENGTH_OF_LISTEN_QUEUE 20  
#define BUFFER_SIZE 1024
#define FILE_NAME_MAX_SIZE 512  

int main(void)  
{  
    
    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);  

      
    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));  

    
    if(-1 == (bind(server_socket_fd, (struct sockaddr*)&server_addr, sizeof(server_addr))))  
    {  
        perror("Server Bind Failed:");  
        exit(1);  
    }  

   
    if(-1 == (listen(server_socket_fd, LENGTH_OF_LISTEN_QUEUE)))  
    {  
        perror("Server Listen Failed:");  
        exit(1);  
    }  

    while(1)  
    {  
       
        struct sockaddr_in client_addr;  
        socklen_t client_addr_length = sizeof(client_addr);  

        
        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;  
        }  

        
        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;  
        }  

        
        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\n", file_name);  

    
        FILE *fp = fopen(file_name, "w");  
        if(NULL == fp)  
        {  
            printf("File:\t%s Can Not Open To Write\n", file_name);  
            exit(1);  
        }  

    
        bzero(buffer, BUFFER_SIZE);  
        int length = 0;  
        while((length = recv(new_server_socket_fd, buffer, BUFFER_SIZE, 0)) > 0)  
        {  
        if(strcmp(buffer,"OK")==0) break;
            if(fwrite(buffer, sizeof(char), length, fp) < length)  
            {  
                printf("File:\t%s Write Failed\n", file_name);  
                break;  
            }  
            bzero(buffer, BUFFER_SIZE);  
        }  


   
        printf("Receive File:\t%s From Client IP Successful!\n", file_name);  
        fclose(fp);


    
    int words=0;
    char s[100];
    FILE *fp2;
    if((fp2=fopen(file_name,"r"))==NULL){
        printf("ERROR!\n");
        exit(0);
    }
    while(fscanf(fp2,"%s",s)!=EOF)
        words++;
    fclose(fp2);
    //printf("%d words.\n",words);


    sprintf(buffer,"%d",words);

    send(new_server_socket_fd,buffer,BUFFER_SIZE,0);

    //send(new_server_socket_fd,&words,sizeof(words),0);
    close(new_server_socket_fd);  




    }  
    
    close(server_socket_fd);  
    return 0;  
}

client.c:

#include<netinet/in.h>     
#include<sys/types.h>     
#include<sys/socket.h>   
#include<stdio.h>        
#include<stdlib.h>        
#include<string.h>        

#define SERVER_PORT 165232  
#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);  

      
    int client_socket_fd = socket(AF_INET, SOCK_STREAM, 0);  
    if(client_socket_fd < 0)  
    {  
        perror("Create Socket Failed:");  
        exit(1);  
    }  

    
    if(-1 == (bind(client_socket_fd, (struct sockaddr*)&client_addr, sizeof(client_addr))))  
    {  
        perror("Client Bind Failed:");  
        exit(1);  
    }  

    
    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);  

   
    if(connect(client_socket_fd, (struct sockaddr*)&server_addr, server_addr_length) < 0)  
    {  
        perror("Can Not Connect To Server IP:");  
        exit(0);  
    }  

    
    char file_name[FILE_NAME_MAX_SIZE+1];  
    bzero(file_name, FILE_NAME_MAX_SIZE+1);  

    printf("Please Input File Name On Client:\t");
    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));  

    
    if(send(client_socket_fd, buffer, BUFFER_SIZE, 0) < 0)  
    {  
        perror("Send File Name Failed:");  
        exit(1);  
    }  


   
        FILE *fp = fopen(file_name, "r");  
        if(NULL == fp)  
        {  
            printf("File:%s Not Found\n", file_name);  
        }  
        else  
        {  
            bzero(buffer, BUFFER_SIZE);  
            int length = 0;  
            
            while((length = fread(buffer, sizeof(char), BUFFER_SIZE, fp)) > 0)  
            {  
                if(send(client_socket_fd, buffer, length, 0) < 0)  
                {  
                    printf("Send File:%s Failed./n", file_name);  
                    break;  
                }  
                bzero(buffer, BUFFER_SIZE);  
            }  

            
            fclose(fp);  
            printf("File:%s Transfer Successful!\n", file_name);  
        char s[50]; 
        scanf("%s",s);
        send(client_socket_fd,"OK",BUFFER_SIZE,0);
        recv(client_socket_fd,buffer,BUFFER_SIZE,0);    
        printf("%d words.\n",atoi(buffer));
    }  

    close(client_socket_fd);  
    return 0;  
}

运行结果

并发程序-2

实验要求

• 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

实验步骤

• 用==man pthread==命令学习==pthread==相关调用

代码
thread_server.c

#include<stdlib.h>
#include<pthread.h>
#include<sys/socket.h>
#include<sys/types.h>       //pthread_t , pthread_attr_t and so on.
#include<stdio.h>
#include<netinet/in.h>      //structure sockaddr_in
#include<arpa/inet.h>       //Func : htonl; htons; ntohl; ntohs
#include<assert.h>          //Func :assert
#include<string.h>          //Func :memset bzero
#include<unistd.h>          //Func :close,write,read
#define SOCK_PORT 9988
#define BUFFER_LENGTH 1024
#define MAX_CONN_LIMIT 512     //MAX connection limit
static void Data_handle(void * sock_fd);   //Only can be seen in the file
int CountWordsOfEuropeanTxtFile(char *szFileName);
int CountWordsInOneLine(const char *szLine);
int main()
{
    int sockfd_server;
    int sockfd;
    int fd_temp;
    struct sockaddr_in s_addr_in;
    struct sockaddr_in s_addr_client;
    int client_length;
    sockfd_server = socket(AF_INET,SOCK_STREAM,0);  //ipv4,TCP
    assert(sockfd_server != -1);
    //before bind(), set the attr of structure sockaddr.
    memset(&s_addr_in,0,sizeof(s_addr_in));
    s_addr_in.sin_family = AF_INET;
    s_addr_in.sin_addr.s_addr = htonl(INADDR_ANY);  //trans addr from uint32_t host byte order to network byte order.
    s_addr_in.sin_port = htons(SOCK_PORT);          //trans port from uint16_t host byte order to network byte order.
    fd_temp = bind(sockfd_server,(const struct sockaddr *)(&s_addr_in),sizeof(s_addr_in));
    if(fd_temp == -1)
    {
        fprintf(stderr,"bind error!\n");
        exit(1);
    }
    fd_temp = listen(sockfd_server,MAX_CONN_LIMIT);
    if(fd_temp == -1)
    {
        fprintf(stderr,"listen error!\n");
        exit(1);
    }
    while(1)
    {
        printf("waiting for new connection...\n");
        pthread_t thread_id;
        client_length = sizeof(s_addr_client);
        //Block here. Until server accpets a new connection.
        sockfd = accept(sockfd_server,(struct sockaddr * restrict)(&s_addr_client),(socklen_t *)(&client_length));
        if(sockfd == -1)
        {
            fprintf(stderr,"Accept error!\n");
            continue;                               //ignore current socket ,continue while loop.
        }
        printf("A new connection occurs!\n");
        if(pthread_create(&thread_id,NULL,(void *)(&Data_handle),(void *)(&sockfd)) == -1)
        {
            fprintf(stderr,"pthread_create error!\n");
            break;                                  //break while loop
        }
    }
    //Clear
    int ret = shutdown(sockfd_server,SHUT_WR); //shut down the all or part of a full-duplex connection.
    assert(ret != -1);
    printf("Server shuts down\n");
    return 0;
}
static void Data_handle(void * sock_fd)
{
    int fd = *((int *)sock_fd);
    int i_recvBytes;
    char data_recv[BUFFER_LENGTH];
    const char * data_send = "Server has received your request!\n";
    while(1)
    {
        printf("waiting for file_name...\n");
        //Reset data.
        memset(data_recv,0,BUFFER_LENGTH);
        i_recvBytes = read(fd,data_recv,BUFFER_LENGTH);
        if(i_recvBytes == 0)
        {
            printf("Maybe the client has closed\n");
            break;
        }
        if(i_recvBytes == -1)
        {
            fprintf(stderr,"read error!\n");
            break;
        }
        if(strcmp(data_recv,"quit")==0)
        {
            printf("Quit command!\n");
            break;                           //Break the while loop.
        }
        printf("read from client : %s\n",data_recv);
        
    char buffer[BUFFER_LENGTH];
    int count=0;
    bzero(buffer, BUFFER_LENGTH);
    count = CountWordsOfEuropeanTxtFile(data_recv);
    sprintf(buffer,"%d", count);
        send(fd, buffer, sizeof(buffer), 0);
        if(write(fd,data_send,strlen(data_send)) == -1)
        {
            break;
        }
    }
    //Clear
    printf("terminating current client_connection...\n");
    close(fd);            //close a file descriptor.
    pthread_exit(NULL);   //terminate calling thread!
}
int CountWordsOfEuropeanTxtFile(char *szFileName)
{
    int nWords = 0;//词计数变量，初始值为0
    FILE *fp; //文件指针
    char carrBuffer[1024];//每行字符缓冲，每行最多1024个字符
    //打开文件
    if ((fp = fopen(szFileName,  "r")) == NULL)
    {
        return -1;  //文件打开不成功是返回-1
    }
    while (!feof(fp))//如果没有读到文件末尾 
    {
        //从文件中读一行
        if (fgets(carrBuffer, sizeof(carrBuffer),fp) != NULL)
            //统计每行词数
            nWords += CountWordsInOneLine(carrBuffer);
    }

    //关闭文件
    fclose(fp);
    return nWords;
}
int CountWordsInOneLine(const char *szLine)
{
    int nWords = 0;
    int i=0;
    for (;i<strlen(szLine);i++)
    {
        if (*(szLine+i)!=' ')
        {
            nWords++;
            while ((*(szLine+i)!=' ')&&(*(szLine+i)!='\0'))
            {
                i++;
            }
        }

    }
            //printf("%d\t",nWords);
    
    return nWords;
}

thread_client.c

#include<stdlib.h>
#include<sys/socket.h>
#include<sys/types.h>       //pthread_t , pthread_attr_t and so on.
#include<stdio.h>
#include<netinet/in.h>      //structure sockaddr_in
#include<arpa/inet.h>       //Func : htonl; htons; ntohl; ntohs
#include<assert.h>          //Func :assert
#include<string.h>          //Func :memset bzero
#include<unistd.h>          //Func :close,write,read
#define SOCK_PORT 9988
#define BUFFER_LENGTH 1024
int main()
{
    int sockfd;
    int tempfd;
    struct sockaddr_in s_addr_in;
    char data_send[BUFFER_LENGTH];
    char data_recv[BUFFER_LENGTH];
    memset(data_send,0,BUFFER_LENGTH);
    memset(data_recv,0,BUFFER_LENGTH);
    sockfd = socket(AF_INET,SOCK_STREAM,0);       //ipv4,TCP
    if(sockfd == -1)
    {
        fprintf(stderr,"socket error!\n");
        exit(1);
    }
    //before func connect, set the attr of structure sockaddr.
    memset(&s_addr_in,0,sizeof(s_addr_in));
    s_addr_in.sin_addr.s_addr = inet_addr("127.0.0.1");      //trans char * to in_addr_t
    s_addr_in.sin_family = AF_INET;
    s_addr_in.sin_port = htons(SOCK_PORT);
    tempfd = connect(sockfd,(struct sockaddr *)(&s_addr_in),sizeof(s_addr_in));
    if(tempfd == -1)
    {
        fprintf(stderr,"Connect error! \n");
        exit(1);
    }
    while(1)
    {
        printf("Please Input File Name On Server(input \"quit\" to quit):\t");
    scanf("%s", data_send);        
    //gets(data_send);
        //scanf("%[^\n]",data_send);         //or you can also use this
        tempfd = write(sockfd,data_send,BUFFER_LENGTH);
        if(tempfd == -1)
        {
            fprintf(stderr,"write error\n");
            exit(0);
        }

        if(strcmp(data_send,"quit") == 0)  //quit,write the quit request and shutdown client
        {
            break;
        }
        else
        {
            tempfd = read(sockfd,data_recv,BUFFER_LENGTH);
            assert(tempfd != -1);
            printf("%s\n",data_recv);
            memset(data_send,0,BUFFER_LENGTH);
            memset(data_recv,0,BUFFER_LENGTH);
        }
    char buffer[BUFFER_LENGTH];
    int length=0;
    bzero(buffer, BUFFER_LENGTH);
        length = recv(sockfd, buffer, BUFFER_LENGTH, 0);
        buffer[length] = '\0';
        printf("count=%s\n", buffer);
        bzero(buffer, BUFFER_LENGTH);
    }
    int ret = shutdown(sockfd,SHUT_WR);       //or you can use func close()--<unistd.h> to close the fd
    assert(ret != -1);
    return 0;
}

运行结果

实验遇到的问题

实验二中编译server文件时提示“对‘pthread_create'未定义的引用”

解决：编译时输入 gcc thread_server.c -o thread_server -lpthread即可。