2019-2020-1-20175332-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
代码实现：
代码如下：
#include <stdio.h> #include <stdlib.h> int main(int argc, char *argv[]){ int count=0; char w[100]; FILE *fp; if((fp=fopen(argv[1],"r"))==NULL){ printf("文件打开失败\n"); exit(0); } while(fscanf(fp,"%s",w)!=EOF){ count++; } printf("%d %s \n",count,argv[1]); fclose(fp); return 0; }
Socket通信过程
server
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include <pthread.h>
#pragma comment(lib,"ws2_32.lib")
pthread_mutex_t counter_mutex = PTHREAD_MUTEX_INITIALIZER;
#define MY_PORT 175332
typedef struct socket_counter
{
SOCKET send_socket;
char buffer[1024];
}socket_counter;
void my_wc(socket_counter *my_counter);
int main()
{
SOCKET listen_socket;//声明Socket接口变量
struct sockaddr_in my_addr;//声明Socket地址变量
int dummy,rev_length;
//char buffer[1024];
char file_name[100];
pthread_t t;
socket_counter *my_counter;
WSADATA wsaDate;
WSAStartup(MAKEWORD(1,1),&wsaDate);//启动版本
listen_socket=socket(AF_INET,SOCK_STREAM,0);//声明为IPV4的TCP
my_addr.sin_family=AF_INET;//IPV4
my_addr.sin_port=htons(MY_PORT);//端口
my_addr.sin_addr.s_addr=htonl(INADDR_ANY);//可以连接任一电脑
dummy = sizeof(SOCKADDR);
memset(file_name,0,sizeof(file_name));
if( bind(listen_socket,(struct sockaddr*)&my_addr,sizeof(struct sockaddr))<0)//绑定本地IP与Socket
{
printf("Server Bind error!\n");
}
if(listen(listen_socket,5)<0)//等待序列，默认队列最多为5个请求
{
printf("Server Listen error!\n");
}
while(1)
{
my_counter->send_socket=accept(listen_socket,NULL,&dummy);//listen函数创建等待队列后，accept函数处理客户端发来的连接请求
if(my_counter->send_socket==-1)
{
printf("Server Accept failed!\n");
break;
}
printf("Accept success!\n");
pthread_create(&t, NULL, &my_wc,my_counter);
pthread_join(&t, NULL);
}
closesocket(listen_socket);//依次关闭连接
WSACleanup();//清除
return 0;
}
void my_wc(socket_counter *my_counter){
pthread_mutex_lock( &counter_mutex );
int len, i;
long wordscount=0;
int flag=1;
while(1)
{
if((len=recv(my_counter->send_socket, my_counter->buffer, 1024, 0))>0)
{
for(i=0; i<len; i++)
{
if(flag==0)
{
switch(my_counter->buffer[i])
{
case ' ':
wordscount++;
break;
case '\n':
wordscount++;
break;
case '\r':
wordscount++;
break;
default:
break;
}
}
if(my_counter->buffer[i]== ' ' || my_counter->buffer[i]=='\n' || my_counter->buffer[i]=='\r')
flag=1;
else
flag=0;
}
}
if(len<1024) break;
}
send(my_counter->send_socket, &wordscount, sizeof(long), 0);
close(my_counter->send_socket);
pthread_mutex_unlock( &counter_mutex );
}
client
#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 175332
#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("请输入文件名:");
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);
}
// 打开文件并读取文件数据
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;
// 每读取一段数据，便将其发送给服务器，循环直到文件读完为止
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);
}
// 关闭文件
fclose(fp);
printf("%s 传输成功\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 %s\n",atoi(buffer),file_name);
}
close(client_socket_fd);
return 0;
}
运行
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 - 学习使用Linux命令wc(1)
多线程的优点：
(1)多线程技术使程序的响应速度更快 ,因为用户界面可以在进行其它工作的同时一直处于活动状态;
(2)当前没有进行处理的任务时可以将处理器时间让给其它任务;
(3)占用大量处理时间的任务可以定期将处理器时间让给其它任务;
(4)可以随时停止任务;
(5)可以分别设置各个任务的优先级以优化性能。
serve
#include<netinet/in.h> #include<sys/types.h> #include<sys/socket.h> #include<stdio.h> #include<stdlib.h> #include<string.h> #include<pthread.h> #define HELLO_WORLD_SERVER_PORT 175332 #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=1; FILE *fp; scanf("%d",&choose); if((fp = fopen(file_name,"r"))==NULL) { printf("Failure to open %s\n",file_name); exit(0); } while((ch=fgetc(fp))!=EOF) { if(ch==' ' || ch=='\n' || ch=='\t' || ch=='\!' || ch=='\?' || ch=='\"' || ch=='\.' || ch== '\,' || ch=='\:' || ch=='\(' || ch=='\)' || ch=='\;' || ch=='\-') { flag=0; } else { if(flag==0) { flag=1; num++; } } } printf("%d %s\n",num,file_name); fclose(fp); return num; } int main(int argc, char **argv) { // 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); // 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!\n"); 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!\n", HELLO_WORLD_SERVER_PORT); exit(1); } // server_socket用于监听 if (listen(server_socket, LENGTH_OF_LISTEN_QUEUE)) { printf("Server Listen Failed!\n"); 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); if (new_server_socket < 0) { printf("Server Accept Failed!\n"); } //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\n"); } } } 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\n",buffer); } strcpy(file_name,buffer); strcat(file_name,"-server"); if((fp = fopen(file_name,"w"))==NULL) { printf("Failure to open %s\n",file_name); exit(0); } while( length = recv(sockid, buffer, BUFFER_SIZE, 0)) { if(length<0) { printf("接受文件出错\n"); exit(0); } if(fwrite(buffer,sizeof(char),length,fp)<length) { printf("写文件失败\n"); } bzero(buffer, BUFFER_SIZE); } fclose(fp); printf("文件传输成功"); 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!\n"); } printf("发送单词个数完毕\n");*/ bzero(buffer, sizeof(buffer)); printf("File Transfer Finished!\n"); close(new_server_socket); }
client
#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
#define HELLO_WORLD_SERVER_PORT 175332
#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\n", 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!\n");
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!\n");
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!\n");
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!\n", argv[1]);
exit(1);
}
char file_name[FILE_NAME_MAX_SIZE + 1];
bzero(file_name, sizeof(file_name));
printf("请输入文件名:");
scanf("%s", file_name);
if((fp = fopen(file_name,"r"))==NULL)
{
printf("Failure to open %s\n",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\n");
}
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\n");
}
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\n");
}
}
printf("%s传输成功\n",file_name);
mywc(file_name,1);
// 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));
// 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;
if((fp = fopen(file_name,"r"))==NULL)
{
printf("Failure to open %s\n",file_name);
exit(0);
}
while((ch=fgetc(fp))!=EOF)
{
if(ch==' ' || ch=='\n' || ch=='\t' || ch=='\!' || ch=='\?' || ch=='\"' || ch=='\.' || ch== '\,' || ch=='\:' || ch=='\(' || ch=='\)' || ch=='\;' || ch=='\-')
{
flag=0;
}
else
{
if(flag==0)
{
flag=1;
num++;
}
}
}
printf("%d %s\n",num,file_name);
fclose(fp);
return num;
}
实验截图
实验三-并发程序-3
- 交叉编译多线程版本服务器并部署到实验箱中
- PC机作客户端测试wc服务器
- 提交测试截图
