[Golang] 写个小东西：今天吃什么好
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所以到底吃什么？
每天到了饭点都会莫名的焦虑，到底吃什么啊，感觉每个都想吃，每个也都不想吃的样子，非常的纠结。打开手机自带的Roll点App又要开始纠结到底点数对应啥，实在是非常的烦人，所以不如写一个程序自动帮我做决定好了。
然而自身太弱了，写不出手机应用，写Web应用的话……不也还是不会写吗！！就这么点小小的需求要等那么多东西学完才能写实在是太不Cool了。于是决定用golang自带的HTTP服务器，加上从网上10分钟水平的HTML，写个自己Roll着玩的就行了，于是一个很朴素的网页就有了：
var htmlFormat = `
<html>
<head>
<style>
a:link{text-decoration:none ; color:black;}
a:visited {text-decoration:none ; color:black;}
a:hover {text-decoration:underline ; color:black;}
a:active {text-decoration:none ; color:black;}
body { font: normal 100%% Helvetica, Arial, sans-serif; }
</style>
<meta name="viewport" content="width=device-width, initial-scale=1" />
</head>
<body>
%s
<hr />
<a href="../">点击此处返回</a>
</body>
</html>
`
AI写代码学习golang的时候也没有怎么好好的使用map，这次就强行把他当个数组来存储我们三餐都可以吃什么吧：
var breakfast, lunch, dinner map[int]string
var nbf, nlc, ndn int
AI写代码既然有了三餐吃什么，当然要从文件里加载了啊（不然怎么练习一下读写文件呢嗯），然后直接爽快的复制三份，调整一下就有了三餐对应的函数，类似于：
func initbf() error {
for ts := range breakfast {
delete(breakfast, ts)
}
nbf = -1
f, err := os.Open("breakfast")
if err != nil {
return err
}
defer f.Close()
reader := bufio.NewReader(f)
for {
line, err := reader.ReadBytes('\n')
nbf++
breakfast[nbf] = string(line)
if err != nil {
if err == io.EOF {
return nil
}
return err
}
}
}
AI写代码然后写一个Roll早餐的函数，并且复制三份，微调一下（捂脸），类似于这样：
func hBreakfast(w http.ResponseWriter, r *http.Request) {
rander := rand.New(rand.NewSource(time.Now().UnixNano()))
fmt.Fprintf(w, htmlFormat, fmt.Sprintf(`
早饭就吃【%s】了！！！<br /><br />
<a href="../breakfast">我不服！再Roll一次！</a>
`, breakfast[rander.Intn(nbf)]))
}
AI写代码然后初始化一个http服务器，并关联一下处理函数，写出main函数：
func main() {
//TODO：初始化一下下
http.HandleFunc("/", hIndex)
http.HandleFunc("/breakfast", hBreakfast)
http.HandleFunc("/lunch", hLunch)
http.HandleFunc("/dinner", hDinner)
log.Fatal(http.ListenAndServe(":8080", nil))
}
AI写代码最后加点花哨的功能←_←，全部代码如下：
package main
import (
"bufio"
"fmt"
"io"
"log"
"math/rand"
"net/http"
"os"
"time"
)
var htmlFormat = `
<html>
<head>
<style>
a:link{text-decoration:none ; color:black;}
a:visited {text-decoration:none ; color:black;}
a:hover {text-decoration:underline ; color:black;}
a:active {text-decoration:none ; color:black;}
body { font: normal 100%% Helvetica, Arial, sans-serif; }
</style>
<meta name="viewport" content="width=device-width, initial-scale=1" />
</head>
<body>
%s
<hr />
<a href="../">点击此处返回</a>
</body>
</html>
`
var htmlBack = `<a href="../">更新请求已经发送，点击此处返回</a>`
var breakfast, lunch, dinner map[int]string
var nbf, nlc, ndn int
func main() {
start()
http.HandleFunc("/", hIndex)
http.HandleFunc("/breakfast", hBreakfast)
http.HandleFunc("/lunch", hLunch)
http.HandleFunc("/dinner", hDinner)
http.HandleFunc("/$update_breakfast$", hubf)
http.HandleFunc("/$update_lunch$", hulc)
http.HandleFunc("/$update_dinner$", hudn)
log.Fatal(http.ListenAndServe(":8080", nil))
}
func start() {
breakfast = make(map[int]string)
lunch = make(map[int]string)
dinner = make(map[int]string)
nbf = 0
nlc = 0
ndn = 0
initbf()
initlc()
initdn()
}
func hubf(w http.ResponseWriter, r *http.Request) {
initbf()
log.Println("Updated Breakfast")
fmt.Fprintf(w, htmlFormat, htmlBack)
}
func hulc(w http.ResponseWriter, r *http.Request) {
initlc()
log.Println("Updated Lunch")
fmt.Fprintf(w, htmlFormat, htmlBack)
}
func hudn(w http.ResponseWriter, r *http.Request) {
initdn()
log.Println("Updated Dinner")
fmt.Fprintf(w, htmlFormat, htmlBack)
}
func initbf() error {
for ts := range breakfast {
delete(breakfast, ts)
}
nbf = -1
f, err := os.Open("breakfast")
if err != nil {
return err
}
defer f.Close()
reader := bufio.NewReader(f)
for {
line, err := reader.ReadBytes('\n')
nbf++
breakfast[nbf] = string(line)
if err != nil {
if err == io.EOF {
return nil
}
return err
}
}
}
func initlc() error {
for ts := range lunch {
delete(lunch, ts)
}
nlc = -1
f, err := os.Open("lunch")
if err != nil {
return err
}
defer f.Close()
reader := bufio.NewReader(f)
for {
line, err := reader.ReadBytes('\n')
nlc++
lunch[nlc] = string(line)
if err != nil {
if err == io.EOF {
return nil
}
return err
}
}
}
func initdn() error {
for ts := range dinner {
delete(dinner, ts)
}
ndn = -1
f, err := os.Open("dinner")
if err != nil {
return err
}
defer f.Close()
reader := bufio.NewReader(f)
for {
line, err := reader.ReadBytes('\n')
ndn++
dinner[ndn] = string(line)
if err != nil {
if err == io.EOF {
return nil
}
return err
}
}
}
func hIndex(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, htmlFormat, `
<a href="/breakfast">早饭吃什么</a><br />
<a href="/lunch">午饭吃什么</a><br />
<a href="/dinner">晚饭吃什么</a>
`)
}
func hBreakfast(w http.ResponseWriter, r *http.Request) {
rander := rand.New(rand.NewSource(time.Now().UnixNano()))
fmt.Fprintf(w, htmlFormat, fmt.Sprintf(`
早饭就吃【%s】了！！！<br /><br />
<a href="../breakfast">我不服！再Roll一次！</a>
`, breakfast[rander.Intn(nbf)]))
}
func hLunch(w http.ResponseWriter, r *http.Request) {
rander := rand.New(rand.NewSource(time.Now().UnixNano()))
fmt.Fprintf(w, htmlFormat, fmt.Sprintf(`
午饭就吃【%s】了！！！<br /><br />
<a href="../lunch">我不服！再Roll一次！</a>
`, lunch[rander.Intn(nlc)]))
}
func hDinner(w http.ResponseWriter, r *http.Request) {
rander := rand.New(rand.NewSource(time.Now().UnixNano()))
fmt.Fprintf(w, htmlFormat, fmt.Sprintf(`
晚饭就吃【%s】了！！！<br /><br />
<a href="../dinner">我不服！再Roll一次！</a>
`, dinner[rander.Intn(ndn)]))
}
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