#ifdef _MSC_VER
#  if _MSVC_LANG <= 201402L
#    include <complex.h>
     typedef _Fcomplex GoComplex64;
     typedef _Dcomplex GoComplex128;
#  else
#    include <complex>
     typedef std::complex<float> GoComplex64;
     typedef std::complex<double> GoComplex128;
#  endif
#else
  typedef float _Complex GoComplex64;
  typedef double _Complex GoComplex128;
#endif

这是一个HTTPS Server的例子，CEXE调用GODLL的函数启动HTTPS Server，Server收到数据后会调用CEXE中的回调函数将HTTP请求数据发送给CEXE并从CEXE处获得HTTP响应数据。

需要注意的是在C和GO之间进行变量类型转换的时候，如果使用C.CString和C.CBytes转换字符串或数据，则需要调用C.free释放内存，使用C.free的需要在import “C”前的C代码中引入头文件stdlib.h，否则会报错。

package main

// //Needed for build
import "C"
import (
	"fmt"
	"io"
	"net/http"
)

func homeHandler(w http.ResponseWriter, r *http.Request) {
	header := fmt.Sprintf("%s %s %s\r\n", r.Method, r.RequestURI, r.Proto)
	header += fmt.Sprintf("Host: %s\r\n", r.Host)
	for k, vs := range r.Header {
		header += fmt.Sprintf("%s: ", k)
		for _, v := range vs {
			header += v
		}
		header += "\r\n"
	}
	header += "\r\n"
	fmt.Fprintf(w, "%s", header)
	body, err := io.ReadAll(io.Reader(r.Body))
	if err != nil {
		http.Error(w, "Error reading request body", http.StatusInternalServerError)
		return
	}
	w.Write(body)
}

//export main
func main() {
	http.HandleFunc("/", homeHandler)
	http.ListenAndServe(":8000", nil)
}