go語言類型轉換問題，求解？

package ipc

import (

    "encoding/json"

    "fmt"

)

type Request struct {

    Method string "method"

    Params string "params"

}

type Response struct {

    Code string "code"

    Body string "body"

}

type Server interface {

    Name() string

    Handle(method, params string) *Response

}

type IpcServer struct {

    Server

}

func NewIpcServer(server Server) *IpcServer {

    return &IpcServer(server)

}

func (server *IpcServer) Connect() chan string {

    session := make(chan string, 0)

    go func(c chan string) {

        for {

            request := <-c

            if request == "CLOSE" { //  關閉該串連

                break

            }

            var req Request

            err := json.Unmarshal([]byte(request), &req)

            if err != nil {

                fmt.Println("Invalid request format:", request)

            }

            resp := server.Handle(req.Method, req.Params)

            b, err := json.Marshal(resp)

            c <- string(b) // 返回結果

        }

        fmt.Println("Session closed.")

    }(session)

    fmt.Println("A new session has been created successfully.")

    return session

}

return &IpcServer(server)
程式編譯這行報錯，說類型轉換異常。不知怎麼改