文件传输代码

简单的TCP文件传输代码2007年03月27日 星期二 11:19原文是在 http://www.yuanma.org/data/2006/0714/article_1135.htm (1):首先在/etc/host中添加Server地址，我的机上是这样 CODE:[Copy to clipboard][root@localhost root]# cat /etc/hosts # Do not remove the following line, or various programs # that require network functionality will fail. 127.0.0.1 localhost.localdomain localhost只需要在下面的一行添加上 CODE:[Copy to clipboard]192.168.1.21 localhost.localdomain Server就可以了，当然，这里的192.168.1.21要改成你的server端程序所在的机子的IP地址，其次，Server 可以随便改成你喜欢的名字，阿毛阿狗都可以，只要跟后面程序中的host_name中一致就行了 下面贴出代码 服务器端，也就是文件存放端的程序 CODE:[Copy to clipboard]/**********************FileServer.c******************************/ //Author: May be duanjigang, ^_^ #include<stdio.h> #include<sys/types.h> #include<sys/fcntl.h> #include<sys/socket.h> #include<netinet/in.h> #include<netdb.h> #define command "clear" //这里其实应改写成ifdef _WIN32 define command "cls" else define "clear"，更合理些 #include<errno.h> #define big_size 2048 #define small_size 50 int main(void) { char c= 0, buf[big_size],//读文件的缓冲 file[small_size],//文件名 host_name[small_size];//主机名 int fromlen = 0,source = 0; register int k,s,ns; struct sockaddr_in sin; struct hostent * hp; system(command);//清屏 printf("输入要传输的文件名:"); memset(file, 0, small_size); scanf("%s",file); if ((source = open(file, O_RDONLY) ) < 0) { perror("源文件打开出错"); exit(1); } memset(host_name, 0, small_size); //写入server的名子，然后gethostbyname将会根据这个名子去找主机的信息 sprintf(host_name, "%s", "Server"); if((hp = gethostbyname(host_name)) == NULL) { perror("返回主机地址信息错!!!"); exit(2); } if( (s = socket(AF_INET, SOCK_STREAM, 0)) < 0) { printf("获取SOCKET号失败!!!"); exit(3); } sin.sin_family=AF_INET; sin.sin_port=htons(1500); memcpy(&sin.sin_addr, hp->h_addr, hp->h_length); if(bind(s, (struct sockaddr*)&sin, sizeof(sin)) < 0 ) { printf("不能将服务器地址捆绑到SOCKET号上!!!\n"); close(s); exit(4); } if(listen(s,5) < 0) { fprintf(stderr, "sever:listen\n"); exit(5); } while(1) { printf("等待传送文件中.......\n"); if((ns = accept(s, NULL, NULL)) < 0 ) { fprintf(stderr, "sever:accept\n"); exit(6); } lseek(source,0L,0); printf("开始传送文件.....\n"); //先把文件名发过求 write(ns,file,sizeof(file)); printf("%s\n", file); //发送文件名 memset(buf, 0, big_size); while( (k = read(source, buf, sizeof(buf))) > 0) { //循环发送直到，文件结束 write(ns,buf,k); memset(buf, 0, big_size); } printf("\n传输完毕\n"); close(ns); } close(source); exit(0); } [code] 客户端，即要下载文件的机子端程序 [code] /*****************************FileClient.c********************************/ #include<stdio.h> #include<sys/types.h> #include<sys/fcntl.h> #include<sys/socket.h> #include<netinet/in.h> #include<netdb.h> #define command "clear" #include<errno.h> #include <string.h> #define big_size 1024 #define small_size 50 int main(void) { char buf[big_size] ={0},file[small_size]={0}, host_name[small_size]={0}; int target,ret; register int bytes,sockfd; struct sockaddr_in sin ; struct hostent *hp; system(command); sprintf(host_name, "%s", "Server"); if((hp = gethostbyname(host_name)) == NULL) { fprintf(stderr, "返回服务器地址信息错!!!\n"); exit(1); } if((sockfd = socket(AF_INET, SOCK_STREAM, 0 )) < 0) { fprintf(stderr, "获取SOCKET号失败!!!\n"); exit(2); } memset((char*)&sin, '\0', sizeof(sin)); sin.sin_family = AF_INET; sin.sin_port = htons(1500); sin.sin_addr = *(struct in_addr*)hp->h_addr; if((ret = connect(sockfd, (struct sockaddr*)&sin, sizeof(sin))) == -1) { fprintf(stderr, "不能与服务器连接!!!\n"); exit(3); } memset(buf, 0, big_size); while(read(sockfd, file, sizeof(file)) < 0); sprintf(buf, "%s_%s", "receive", file); if((target=open(buf, O_WRONLY|O_CREAT|O_TRUNC,0644)) < 0) { perror("不能打开目标文件!!"); exit(4); } memset(buf, 0, big_size); while((bytes = read(sockfd, buf, sizeof(buf))) > 0) { write(target,buf,bytes); memset(buf, 0, big_size); } printf("接收文件成功!!!\n"); close(sockfd); close(target); }