socket_client.c

socket实现网络通信的一个简单实现 socket实现网络通信的一个简单实现

#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include<sys/ioctl.h>
#include<sys/stat.h>
#include<fcntl.h>


void client(char* addr,unsigned short int port,const char *file_name)
{
    int sockfd;
    int len;

    struct sockaddr_in address;
    int result;

    char buff[BUFSIZ];

    //创建一个套接字
    sockfd = socket(AF_INET,SOCK_STREAM,0);

    //命名套接字
    address.sin_family = AF_INET;
    address.sin_addr.s_addr = inet_addr(addr);
    address.sin_port = htons(port);
    len = sizeof(address);

    //将客户端套接字连接到服务器套接字 
    result = connect(sockfd,(struct sockaddr *)&address,len);
    if(result == -1)
    {
        perror("oops: clinet");
        exit(-1);
    }

    printf("Client connection.\n");
    send(sockfd,"G",1,0);
    //发送GET请求
    FILE* stream;
    int nread;
    stream = fopen(file_name,"w+t");
    if(stream == NULL)
       exit(1);
    //将网页在本地
    while((nread = recv(sockfd,buff,BUFSIZ,0)) > 0){
        fwrite(buff,sizeof(char),nread,stream);
        bzero(buff,BUFSIZ);
    }
   fclose(stream);
}
int main(int argc,char* argv[])
{

    client("127.0.0.1",9999,"a.html");
    //用浏览器打开页面
    execlp("firefox","a.html",0);
    return (EXIT_SUCCESS);
}