本文实例为大家分享了C++实现json形式的Socket传输图片的具体代码，供大家参考，具体内容如下
大致流程：客户端读取图片，经过Base64编码，转成字符串的形式，保存到json中，通过socket传到服务端，然后Base64解码，再转换成图片
一.服务端
1.main.cpp
#include <iostream>
#include <stdio.h>
#include "Base64_1.h"
#include <winsock2.h>
#include "json1.hpp"
#pragma comment(lib,"ws2_32.lib")
using json = nlohmann::json;
char revData[3888888];
bool WritePhotoFile(std::basic_string<TCHAR> strFileName, std::string &strData)
{
HANDLE hFile;
hFile = CreateFile(strFileName.c_str(), GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
if (hFile == INVALID_HANDLE_VALUE)
{
return false;
}
CBase64 base64;
int datalen(0);
DWORD dwritelen(0);
std::string strdcode = base64.Decode(strData.data(), strData.size(), datalen);
if (!WriteFile(hFile, strdcode.data(), datalen, &dwritelen, NULL))
{
CloseHandle(hFile);
return false;
}
CloseHandle(hFile);
return true;
}
int main(int argc, char* argv[])
{
//初始化WSA
WORD sockVersion = MAKEWORD(2, 2);
WSADATA wsaData;
if (WSAStartup(sockVersion, &wsaData) != 0)
{
return 0;
}
//创建套接字
SOCKET slisten = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (slisten == INVALID_SOCKET)
{
printf("socket error !");
return 0;
}
//绑定IP和端口
sockaddr_in sin;
sin.sin_family = AF_INET;
sin.sin_port = htons(8888);
sin.sin_addr.S_un.S_addr = INADDR_ANY;
if (bind(slisten, (LPSOCKADDR)&sin, sizeof(sin)) == SOCKET_ERROR)
{
printf("bind error !");
}
//开始监听
if (listen(slisten, 5) == SOCKET_ERROR)
{
printf("listen error !");
return 0;
}
//循环接收数据
SOCKET sClient;
sockaddr_in remoteAddr;
int nAddrlen = sizeof(remoteAddr);
//revData = (char*)malloc(sizeof(char) * 1000000);
int i = 1;
while (true)
{
printf("等待连接...n");
sClient = accept(slisten, (SOCKADDR *)&remoteAddr, &nAddrlen);
if (sClient == INVALID_SOCKET)
{
printf("accept error !");
continue;
}
printf("接受到一个连接：%s rn", inet_ntoa(remoteAddr.sin_addr));
//接收数据
int ret = recv(sClient, revData, 3888888, 0);
if (ret > 0)
{
revData[ret] = 0x00;
json o = json::parse(revData);
for (json::iterator it = o.begin(); it != o.end(); ++it) {
//std::cout << it.key() << " : " << it.value() << "n";
if (it.key() == "imgA"|| it.key() == "imgB")
{
std::string num = std::to_string(i++);
std::string strFileName = "D:"+ num +".jpg";
std::string val = it.value();
WritePhotoFile(strFileName, val);
}
}
//std::cout<< json::parse(revData)<< std::endl;
//printf(revData);
}
//发送数据
//const char * sendData = "你好，TCP客户端！n";
//send(sClient, sendData, strlen(sendData), 0);
closesocket(sClient);
}
closesocket(slisten);
WSACleanup();
return 0;
}
