简单的C++文件服务器--Linux C++客户端从服务端获取文件
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2022-06-06 08:41:11
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client.cpp
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <netdb.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <stdlib.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <netdb.h>
#define MAXLINE 4096
int main(int argc, char** argv){
int sockfd, len;
char buff[MAXLINE];
struct sockaddr_in servaddr;
FILE *fp;
int n;
if( argc != 2){
printf("usage: ./client <ipaddress>\n");
return 0;
}
if( (sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0){
printf("create socket error: %s(errno: %d)\n", strerror(errno),errno);
return 0;
}
memset(&servaddr, 0, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_port = htons(6666);
if( inet_pton(AF_INET, argv[1], &servaddr.sin_addr) <= 0){
printf("inet_pton error for %s\n",argv[1]);
return 0;
}
if( connect(sockfd, (struct sockaddr*)&servaddr, sizeof(servaddr)) < 0){
printf("connect error: %s(errno: %d)\n",strerror(errno),errno);
return 0;
}
if( ( fp = fopen("sbt_client.with-apt-boost","ab") ) == NULL ){
printf("File.\n");
close(sockfd);
exit(1);
}
while(1){
n = read(sockfd, buff, MAXLINE);
if(n == 0)
break;
fwrite(buff, 1, n, fp);
}
buff[n] = '\0';
printf("recv msg from server: %s\n", buff);
close(sockfd);
fclose(fp);
return 0;
}
server.cpp
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<errno.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<netinet/in.h>
#include<unistd.h>
#define MAXLINE 4096
int main(int argc, char** argv){
int listenfd, sockfd, len;
struct sockaddr_in servaddr;
char buff[4096];
FILE *fp;
int n;
if( (listenfd = socket(AF_INET, SOCK_STREAM, 0)) == -1 ){
printf("create socket error: %s(errno: %d)\n",strerror(errno),errno);
return 0;
}
printf("----init socket----\n");
memset(&servaddr, 0, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
servaddr.sin_port = htons(6666);
//设置端口可重用
int contain;
setsockopt(listenfd,SOL_SOCKET, SO_REUSEADDR, &contain, sizeof(int));
if( bind(listenfd, (struct sockaddr*)&servaddr, sizeof(servaddr)) == -1){
printf("bind socket error: %s(errno: %d)\n",strerror(errno),errno);
return 0;
}
printf("----bind sucess----\n");
if( listen(listenfd, 10) == -1){
printf("listen socket error: %s(errno: %d)\n",strerror(errno),errno);
return 0;
}
if((fp = fopen("/root/sbt_client.with-apt-boost","rb") ) == NULL )
{
printf("File open.\n");
close(listenfd);
exit(1);
}
printf("======waiting for client's request======\n");
while(1){
struct sockaddr_in client_addr;
socklen_t size=sizeof(client_addr);
if( (sockfd = accept(listenfd, (struct sockaddr*)&client_addr, &size)) == -1){
printf("accept socket error: %s(errno: %d)",strerror(errno),errno);
continue;
}
bzero(buff,sizeof(buff));
while(!feof(fp)){
len = fread(buff, 1, sizeof(buff), fp);
if(len != write(sockfd, buff, len)){
printf("write.\n");
break;
}
}
close(sockfd);
fclose(fp);
}
close(listenfd);
return 0;
}