Handlers.go

package main

import (
    "encoding/json" 
    "fmt"
    "net/http"
    "io/ioutil"
    "io"
    
    "github.com/gorilla/mux"
)    

// Index
func Index(w http.ResponseWriter, r *http.Request) { 
	fmt.Fprintf(w, "Welcome!")
}

func TodoIndex(w http.ResponseWriter, r *http.Request) { 
	
    w.Header().Set("Content-Type", "application/json; charset=UTF-8")
    w.WriteHeader(http.StatusOK)
    
    if err := json.NewEncoder(w).Encode(todos); err != nil { 
        panic(err)
    }
}

func TodoShow(w http.ResponseWriter, r *http.Request) { 
	vars := mux.Vars(r)
	todoID := vars["todoid"]
	fmt.Fprintln(w, "Todo show:", todoID)
}

func TodoCreate(w http.ResponseWriter, r *http.Request) {
    var todo Todo
    body, err := ioutil.ReadAll(io.LimitReader(r.Body, 1048576))
    if err != nil { 
        panic(err)
    }
    
    if err := r.Body.Close(); err != nil { 
        panic(err)
    }
    
    if err := json.Unmarshal(body, &todo); err != nil { 
        w.Header().Set("Content-Type", "application/json; charset=UTF-8")
        w.WriteHeader(422)
        if err := json.NewEncoder(w).Encode(err); err != nil { 
            panic(err)
        }
    } 
    
    t := RepoCreateTodo(todo)
    w.Header().Set("Content-Type", "application/json; charset=UTF-8")
    w.WriteHeader(http.StatusCreated)
    if err := json.NewEncoder(w).Encode(t); err != nil { 
        panic(err)
    }
}