C++使用wininet调用ip查询接口获取ip归属地

//头文件包含：

#include <iostream>
#include <Windows.h>
#include <unordered_map>
#include <mutex>
#include <wininet.h>
#pragma comment(lib, "Wininet.lib")
#include <locale>
#include <codecvt>

//小小封装，通过ip返回归属地

std::string GetIpDetails(const char* ip){
std::string url = "http://ip-api.com/json/";
		url += ip;
		std::string response = "";
		// 初始化WinINet
		HINTERNET hInternet = InternetOpenA("HTTP /1.1", INTERNET_OPEN_TYPE_DIRECT, NULL, NULL, 0);
		if (hInternet) {
			// 打开连接
			HINTERNET hConnect = InternetOpenUrlA(hInternet, url.c_str(), NULL, 0, INTERNET_FLAG_RELOAD, 0);
			if (hConnect)
			{
				// 添加必要的头部请求信息
				std::string headers = "";
				headers += "Content-Type: application/json; charset=utf-8
";
				// 设置请求头部
				HttpAddRequestHeadersA(hConnect, headers.c_str(), (DWORD)headers.length(), HTTP_ADDREQ_FLAG_ADD);
				// 读取响应数据
				char buffer[128]={0};
				DWORD bytesRead;
				do
				{
					if (InternetReadFile(hConnect, buffer, sizeof(buffer) - 1, &bytesRead))
					{
						buffer[bytesRead] = '';
						response.append(buffer);
					}
				} while (bytesRead > 0);

				// 关闭连接
				InternetCloseHandle(hConnect);
			}
			else
			{
				;// std::cerr << "Failed to open connection" << std::endl;
			}

			// 关闭WinINet
			InternetCloseHandle(hInternet);
		}
		else
		{
			;// std::cerr << "Failed to open WinINet" << std::endl;
		}

		return response;
}

//调用

int main(){
    printf("%s
",GetIpDetails("115.191.200.34").c_str());
}

//返回json数据参考

{
	"status": "success",
	"country": "中国",
	"countryCode": "CN",
	"region": "BJ",
	"regionName": "北京市",
	"city": "北京",
	"zip": "100000",
	"lat": 39.9042,
	"lon": 116.407,
	"timezone": "Asia/Shanghai",
	"isp": "GWBN-WUHAN's IP",
	"org": "",
	"as": "",
	"query": "115.191.200.34"
}

//返回结果中文乱码，转换结果编码即可：

void U8ToAnsic(std::string& _u8) {
		int utf8Length = (int)_u8.length();
		LPCCH u8Str = (LPCCH)_u8.data();

		int ansiLength = MultiByteToWideChar(CP_UTF8, 0, u8Str, utf8Length, NULL, 0);
		wchar_t* wideString = new wchar_t[ansiLength];
		MultiByteToWideChar(CP_UTF8, 0, u8Str, utf8Length, wideString, ansiLength);

		int requiredSize = WideCharToMultiByte(CP_ACP, 0, wideString, -1, NULL, 0, NULL, NULL);
		char* ansiString = new char[requiredSize];
		WideCharToMultiByte(CP_ACP, 0, wideString, -1, ansiString, requiredSize, NULL, NULL);

		_u8 = ansiString;

		delete[]wideString;
		delete[]ansiString;

}

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