问题描述
尝试从共享库运行 servr,因此我执行了以下操作:
- 将共享库编写为:
// server.go
package main
import (
"fmt"
"net/http"
)
import "C"
func hello(w http.ResponseWriter,req *http.Request) {
fmt.Fprintf(w,"hello\n")
}
func headers(w http.ResponseWriter,req *http.Request) {
for name,headers := range req.Header {
for _,h := range headers {
fmt.Fprintf(w,"%v: %v\n",name,h)
}
}
}
func main() {}
// export Run server
func Run(port string) {
http.HandleFunc("/hello",hello)
http.HandleFunc("/headers",headers)
if err := http.ListenAndServe("localhost:"+port,nil); err == nil {
fmt.Println("listening to 8090")
} else {
fmt.Println("ListenAndServe: ",err)
}
}
- 将共享库编译为:
$ go build -buildmode c-shared -o server.so server.go
//main.go
package main
/*
#cgo LDFLAGS: -ldl
#include <dlfcn.h>
void Run(char* port){}
*/
import "C"
func main() {
// handle := C.dlopen(C.CString("server.so"),C.RTLD_LAZY)
// C.dlsym(handle,C.CString("8090"))
C.dlopen(C.CString("server.so"),C.RTLD_LAZY)
C.run(C.CString("8090"))
}
- 运行主文件:
$ go run main.go
main函数已经直接终止了,srver还没有在http://localhost:8090/hello
运行
解决方法
你为什么不把它分成一个go包(例如:包服务器)和导入这个包的主应用程序:
您的项目/cmd/server/main.go
package main
import (
"yourproject/internal/server"
)
func main() {
srv := server.New()
// ...
port := "8443"
// do some logic here
srv.Run(port)
}
和 yourproject/internal/server/server.go
package server
import (
"fmt"
"net/http"
)
import "C"
type Server struct{}
func New() *Server {
return &Server{}
}
func hello(w http.ResponseWriter,req *http.Request) {
fmt.Fprintf(w,"hello\n")
}
func headers(w http.ResponseWriter,req *http.Request) {
for name,headers := range req.Header {
for _,h := range headers {
fmt.Fprintf(w,"%v: %v\n",name,h)
}
}
}
// export Run server
func (s *Server) Run(port string) {
http.HandleFunc("/hello",hello)
http.HandleFunc("/headers",headers)
if err := http.ListenAndServe("localhost:"+port,nil); err == nil {
fmt.Println("listening to 8090")
} else {
fmt.Println("ListenAndServe: ",err)
}
}