2019-2020-1 20175218 实验三 并发程序
2019-2020-1 20175218 实验三 并发程序
一、实验内容
1、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
- 上方提交代码
- 附件提交测试截图，至少要测试附件中的两个文件
2、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
3、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
二、实验步骤
1、并发程序-1
- 通过 man -k wc 了解wc的相关命令，得知，有命令wc(1)。
- 通过 man 1 wc ，学习使用Linux命令wc(1)。
- 使用 wc -w test1.txt 和 wc -w test2.txt 命令查看两个文件的单词数。
- 代码实现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
server.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 175218
#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 %s successful!\n", file_name);
fclose(fp);
int words=0;
char s[1000];
FILE *fp2;
if((fp2=fopen(file_name,"r"))==NULL){
printf("ERROR!\n");
exit(0);
}
while(fscanf(fp2,"%s",s)!=EOF)
words++;
fclose(fp2);
sprintf(buffer,"%d",words);
send(new_server_socket_fd,buffer,BUFFER_SIZE,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 175218
#define BUFFER_SIZE 1024
#define FILE_NAME_MAX_SIZE 512
int main()
{
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("Transfer file %s successful!\n", file_name);
send(client_socket_fd,"OK",BUFFER_SIZE,0);
recv(client_socket_fd,buffer,BUFFER_SIZE,0);
printf("%d\n",atoi(buffer));
}
close(client_socket_fd);
return 0;
}
- 码云链接：
2、并发程序-2
-
客户端代码可以沿用上面实验的，只需要修改服务器端代码即可。
-
将 exp1 的 client.c 代码复制到 exp2 中作 client.c 的代码
-
编写 exp2 的服务器端代码 server.c 。增加多线程以及使用同步互斥。
-
代码实现
server.c
#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 175218
#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)\n");
scanf("%d",&choose);
if((fp = fopen(file_name,"r"))==NULL)
{
printf("Failure to open %s\n",file_name);
exit(0);
}
if(choose==1)
{
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++;
}
}
}
}
else if(choose==2)
{
while((ch=fgetc(fp))!=EOF)
{
if(ch==' ' || ch=='\n' || ch=='\t' || ch=='\r')
flag=0;
else
{
if(flag==0)
{
flag=1;
num++;
}
}
}
}
printf("单词个数为：%d\n",num);
fclose(fp);
return num;
}
int main(int argc, char **argv)
{
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);
int server_socket = socket(PF_INET, SOCK_STREAM, 0);
if (server_socket < 0)
{
printf("Create Socket Failed!\n");
exit(1);
}
if (bind(server_socket, (struct sockaddr*)&server_addr, sizeof(server_addr)))
{
printf("Server Bind Port: %d Failed!\n", HELLO_WORLD_SERVER_PORT);
exit(1);
}
if (listen(server_socket, LENGTH_OF_LISTEN_QUEUE))
{
printf("Server Listen Failed!\n");
exit(1);
}
while(1)
{
struct sockaddr_in client_addr;
socklen_t length = sizeof(client_addr);
int new_server_socket = accept(server_socket, (struct sockaddr*)&client_addr, &length);
printf("连接到客户端\n");
if (new_server_socket < 0)
{
printf("Server Accept Failed!\n");
}
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;
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("接受文件完毕\n");
int number=0;
number=mywc(file_name);
bzero(buffer, BUFFER_SIZE);
buffer[0]=number+48;
bzero(buffer, sizeof(buffer));
printf("File Transfer Finished!\n");
close(new_server_socket);
}
client.c
#include<netinet/in.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#define HELLO_WORLD_SERVER_PORT 175218
#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);
}
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 = socket(AF_INET, SOCK_STREAM, 0);
if (client_socket < 0)
{
printf("Create Socket Failed!\n");
exit(1);
}
if (bind(client_socket, (struct sockaddr*)&client_addr, sizeof(client_addr)))
{
printf("Client Bind Port Failed!\n");
exit(1);
}
struct sockaddr_in server_addr;
bzero(&server_addr, sizeof(server_addr));
server_addr.sin_family = AF_INET;
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);
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("Please Input File Name.\t");
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("发送%s完毕\n",file_name);
mywc(file_name,1);
mywc(file_name,2);
bzero(buffer, sizeof(buffer));
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);
}
if(choose==1)
{
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++;
}
}
}
}
else if(choose==2)
{
while((ch=fgetc(fp))!=EOF)
{
if(ch==' ' || ch=='\n' || ch=='\t' || ch=='\r')
flag=0;
else
{
if(flag==0)
{
flag=1;
num++;
}
}
}
}
printf("单词个数为：%d_用方式%d计算\n",num,choose);
fclose(fp);
return num;
}
- 代码实现功能
- 码云链接：
3、并发程序-3
三、实验中遇到的问题及解决方法
问题：
还是遇到了实验一时的麻烦，很难ping通虚拟机和实验箱。
解决方法：
再更换了几个实验箱之后，还是无法ping通。就借用其他同学ping通了的电脑完成实验。
四、实验感想
通过这次实验，让我学会了如何用C语言在 linux 中搭建服务器端与客户端的联系，并且实现 wc 命令功能。实现了单线程和多线程两种不同版本的联系。在第三个实验还复习了第一个实验，复习到了通过超级终端实现电脑虚拟机与实验箱的联系搭建。
