socket-文件傳輸-C-接收端

socket文件傳輸-接收端

發送端：https://blog.csdn.net/qq_33904382/article/details/104827471

C 使用socket傳輸文件的接收端。主函數也可作爲一般client端的結構。

---

主函數：

/* read&write */
#include<stdio.h>
/* structure */
#include<sys/types.h>
#include<netinet/in.h>
/* memset */
#include<string.h>
/* fflush */
#include<fcntl.h>


typedef struct sockaddr SA;
const int maxsize=9056;
/* Receive file ans store it */
void cli_do(FILE* inputfd,int sockfd);

int
main(int argc,char* argv[])
{
	/* Get a socket */
        int serfd = socket(AF_INET,SOCK_STREAM,0);
        struct sockaddr_in ser_addr;
	/* Init structure of socket */
        ser_addr.sin_family = AF_INET;/* net family */
        ser_addr.sin_port = htons(13000);/* socket port */
        inet_pton(AF_INET,argv[1],&ser_addr.sin_addr);/* Config IP */
	/* Connect with socket server */
        connect(serfd,(SA*)&ser_addr,sizeof(ser_addr));
	/* What really useful */
        cli_do(stdin,serfd);
return 0;
}

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cli_do: 接收文件並保存到同目錄下的名爲“txt”的文件

void cli_do(FILE* inputfd,int sockfd)
{
        FILE* recv = fopen("./txt","ab");/* File ptr for store distination */
        int n;/* size of the file */
        char sendbuffer[maxsize],recvbuffer[maxsize];/*  buffer for recv and send*/
        memset(sendbuffer,0,maxsize);memset(recvbuffer,0,maxsize);
        /* Read from socket,write into file ./txt */
        while((fgets(sendbuffer,maxsize,inputfd))!=NULL){
                write(sockfd,sendbuffer,maxsize);
                if(n = read(sockfd,recvbuffer,maxsize)>0){
                        fprintf(recv,"%s",recvbuffer);
                        fflush(recv);/* carefully for this */
                }
        }
        fclose(recv);/* just for my habit */
}