apigen/test/goapi/apigen.go

package goapi

import (
	"context"
	"encoding/json"
	"net/http"
	"strings"
)

type API struct {
	Mux   *http.ServeMux
	Perms map[string]string
}

func (a *API) GetPerm(r *http.Request) string {
	return a.Perms[r.Method+"_"+strings.Split(r.RequestURI, "?")[0]]
}

func Init() API {
	mux := &http.ServeMux{}

	ret := API{
		Mux:   mux,
		Perms: make(map[string]string),
	}

	mux.HandleFunc("/someapi", func(w http.ResponseWriter, r *http.Request) {
		switch r.Method {
		case "POST":
			h_SomeAPI(w, r)
		default:
			http.Error(w, "Method not allowed", 500)
		}
	})
	return ret
}

func h_SomeAPI(w http.ResponseWriter, r *http.Request) {

	ctx := r.Context()
	ctx = context.WithValue(r.Context(), "REQ", r)
	ctx = context.WithValue(ctx, "RES", w)
	var req string
	if r.Method != http.MethodGet && r.Method != http.MethodHead {
		err := json.NewDecoder(r.Body).Decode(&req)
		if err != nil {
			http.Error(w, err.Error(), 500)
			return
		}
	}

	res, err := SomeAPI(ctx, req)
	if err != nil {
		http.Error(w, err.Error(), 500)
		return
	}
	w.Header().Add("Content-Type", "Application/json")
	err = json.NewEncoder(w).Encode(res)
	if err != nil {
		http.Error(w, err.Error(), 500)
		return
	}
}