Handler functions for blog REST API

handlers.go

package main

import (
	"encoding/json"
	"fmt"
	"net/http"
	"io"
	"io/ioutil"
	"strconv"
	"time"
	
        mux "github.com/julienschmidt/httprouter"
)

func Index(w http.ResponseWriter, r *http.Request, _ mux.Params) {
        fmt.Fprintf(w, "<h1 style=\"font-family: Helvetica;\">Hello, welcome to blog service</h1>")
}

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

func PostShow(w http.ResponseWriter, r *http.Request, ps mux.Params) {
	
	id, err := strconv.Atoi(ps.ByName("postId"))
	
	HandleError(err)

	post := FindPost(id)
	
	if err := json.NewEncoder(w).Encode(post); err != nil {
	        panic(err)
	}
}

func PostCreate(w http.ResponseWriter, r *http.Request, _ mux.Params) {
	
	var post Post
	
	body, err := ioutil.ReadAll(io.LimitReader(r.Body, 1048576))
	HandleError(err)

	if err := r.Body.Close(); err != nil {
	        panic(err)
	}
	
	// Save JSON to Post struct
	if err := json.Unmarshal(body, &post); 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)
	        }
	}

	CreatePost(post)
        w.Header().Set("Content-Type", "application/json; charset=UTF-8")
        w.WriteHeader(http.StatusCreated)
}