windows C++使用socket发送和接收文件

如有看不懂的地方建议从这里开始 C++下TCP发送hello world的过程：https://blog.csdn.net/qq_39511059/article/details/79658841大体思路就是将文件分块，然后转化为char流传输。//server.cpp用来接受文件

#define _CRT_SECURE_NO_WARNINGS 1
#include <winsock2.h>
#include <stdio.h>
#include <windows.h>
#include <string.h>
#pragma comment(lib,"ws2_32.lib")
#include<iostream>
using namespace std;
struct FileName {//用来存储和传输文件名扩展名的结构体
char Fname[64];
int len;
};
class FileReciever {
private:
int server;
int client;
sockaddr_in sa;
sockaddr_in ca;
char buff[1024];
FILE *fp;
FileName fn;
public:
FileReciever()
{
server = socket(AF_INET, SOCK_STREAM, 0);
client = socket(AF_INET, SOCK_STREAM, 0);

}
int Listen(int port)
{
sa.sin_family = AF_INET;
sa.sin_port = htons(port);
sa.sin_addr.S_un.S_addr = htonl(INADDR_ANY);

bind(server, (sockaddr*)&sa, sizeof(sa));
listen(server, 5);
int len = sizeof(ca);
printf("waiting for connect\n");
client = accept(server, (sockaddr*)&ca, &len);
if (client == INVALID_SOCKET)
cout << "failed" << endl;
return 1;
}
int RecieveFile(const char *path)
{
char p[64];
strcpy_s(p,64, path);
int len = strlen(p);
if (p[len - 1] != '\\')
{
p[len] = '\\';
len++;
}
recv(client, (char*)&fn, sizeof(fn),0);
strcat(p, fn.Fname);
long long siz;
recv(client, (char*)&siz, sizeof(siz), 0);
siz = siz / 1024;
fp = fopen(p, "wb+");
long long int index = 0;
int num;
while (index<=siz)
{
num = recv(client, buff, 1024, 0);
if (num <= 0)
break;
fwrite(buff, (int)num, 1, fp);
index++;

cout << (int)index * 100 / siz << num<<endl;
}
printf("seccess\n");
return 0;
}
};
int main()
{
WSADATA WSAData;
WSAStartup(MAKEWORD(2, 2), &WSAData);
FileReciever fr;
fr.Listen(3000);
char p[] = "F:\\";
fr.RecieveFile(p);
system("pause");
}

//client.cpp用来发送文件

#define _WINSOCK_DEPRECATED_NO_WARNINGS 1
#define _CRT_SECURE_NO_WARNINGS 1
#include<winsock2.h>
#include<stdlib.h>
#include<iostream>
#pragma comment(lib, "ws2_32.lib")
using namespace std;
struct FileName {//存储形式："文件名.扩展名"
char Fname[64];
int len;
};
class FileSender
{
private:
FILE * fp;
SOCKET sock;
sockaddr_in addr;
FileName fn;
char temp[1024];
public:
FileSender()
{
sock = socket(AF_INET, SOCK_STREAM, 0);
}
int Connect(const char *ip, int port)
{
addr.sin_family = AF_INET;
addr.sin_port = htons(port);
addr.sin_addr.S_un.S_addr = inet_addr(ip);

if (connect(sock, (sockaddr*)&addr, sizeof(addr)) != 0)
{
cout << "failed.." << endl;
}
return 1;
}
int openFile(const char *path)
{
char name[32], ext[16];
_splitpath(path, NULL, NULL, name, ext);
strcat_s(name, 32, ext);
strcpy_s(fn.Fname, 32, name);
fn.len = strlen(fn.Fname);
fp = fopen(path, "rb");
return 0;
}
int SendFile(const char *path)
{
openFile(path);
send(sock, (char*)&fn, sizeof(FileName),0);
fseek(fp, 0, SEEK_END);
long long siz = ftell(fp);
fseek(fp, 0, SEEK_SET);
send(sock, (CHAR*)&siz, sizeof(siz),0);
siz = siz / 1024;
long long index=0;
int num;
while (1)
{
num=fread(temp, 1, 1024, fp);
if (num == 0)
break;
send(sock, temp, num, 0);
index++;
cout << (int)index*100/siz<<"%" << num << endl;
}
cout << "Successfully send" << endl;
return 0;
}

};
int main()
{
WSADATA wsaData;
WSAStartup(MAKEWORD(2, 2), &wsaData);
char path[] = "F:\\Program Files\\newText.txt";//发送文件的路径
FileSender fs;
if(fs.Connect("127.0.0.1", 3000))
fs.SendFile(path);
system("pause");
}