diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..d163863
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+build/
\ No newline at end of file
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..d101605
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,44 @@
+BINARY_DEFAULT="build/bitly.service"
+BINARY_LINUX="build/linux-amd64-bitly.service"
+BINARY_DARWIN="build/darwin-amd64-bitly.service"
+BINARY_WINDOWS="build/windows-amd64-bitly.service"
+
+GOFILES="main.go"
+VERSION=1.0.0
+BUILD=`date +%FT%T%z`
+
+default:
+	@echo ${BINARY_DEFAULT}
+	@go build -o ${BINARY_DEFAULT} ${GOFILES}
+
+all:
+	@echo ${BINARY_LINUX}
+	@CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o ${BINARY_LINUX} ${GOFILES}
+	@echo ${BINARY_DARWIN}
+	@CGO_ENABLED=0 GOOS=darwin GOARCH=amd64 go build -o ${BINARY_DARWIN} ${GOFILES}
+	@echo ${BINARY_WINDOWS}
+	@CGO_ENABLED=0 GOOS=windows GOARCH=amd64 go build -o ${BINARY_WINDOWS} ${GOFILES}
+
+linux:
+	@echo ${BINARY_LINUX}
+	@CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o ${BINARY_LINUX} ${GOFILES}
+
+darwin:
+	@echo ${BINARY_DARWIN}
+	@CGO_ENABLED=0 GOOS=darwin GOARCH=amd64 go build -o ${BINARY_DARWIN} ${GOFILES}
+
+windows:
+	@echo ${BINARY_WINDOWS}
+	@CGO_ENABLED=0 GOOS=windows GOARCH=amd64 go build -o ${BINARY_WINDOWS} ${GOFILES}
+
+install:
+	@go mod tidy
+
+fmt:
+	@go fmt ./...
+
+clean:
+	@if [ -f ${BINARY_DEFAULT} ] ; then rm ${BINARY_DEFAULT} ; fi
+	@if [ -f ${BINARY_LINUX} ] ; then rm ${BINARY_LINUX} ; fi
+	@if [ -f ${BINARY_DARWIN} ] ; then rm ${BINARY_DARWIN} ; fi
+	@if [ -f ${BINARY_WINDOWS} ] ; then rm ${BINARY_WINDOWS} ; fi
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..98145f8
--- /dev/null
+++ b/README.md
@@ -0,0 +1,89 @@
+# bitly
+
+基于 golang1.13 与 bitly api 实现的短链接生成服务
+
+## Table of Contents
+
+- [Install](#install)
+- [Usage](#usage)
+- [API](#api)
+- [Maintainers](#maintainers)
+- [Contributing](#contributing)
+- [License](#license)
+
+## Install
+
+安装依赖
+
+```
+make install
+```
+
+生成可执行文件，目录位于 build/ 。默认当前平台，其他平台请参照 Makefile 或执行对应 go build 命令。
+
+```
+make
+```
+
+## Usage
+
+自行获取 bitly api token。前往 [Release](https://github.com/CareyWang/bitly/releases) 下载对应平台可执行文件。
+
+```
+./build/bitly.service -h
+Usage of ./build/bitly.service:
+  -cache int
+      是否使用 redis 缓存
+  -port int
+    	服务端口 (default 8001)
+  -token string
+    	Bitly api token
+
+./build/bitly.service -token xxxxxxxxxxxxxxxxxxx
+```
+
+建议配合 [pm2](https://pm2.keymetrics.io/) 开启守护进程。
+
+```
+pm2 start bitly.service --watch --name bitly -- --token xxxxxxxxxxxxxxxxxxxx
+```
+
+## API
+
+```
+GET /
+```
+
+### Parameters
+|Name|Type|Description|
+|---|---|---|
+|longUrl|string|长链接|
+
+### Response
+
+```
+Content-Type: application/json
+Status: 200 OK 
+
+{
+    "Code":1,
+    "Message":"",
+    "LongUrl":"https://www.baidu.com",
+    "ShortUrl":"http://bit.ly/38iQlfH"
+}
+```
+
+
+## Maintainers
+
+[@CareyWang](https://github.com/CareyWang)
+
+## Contributing
+
+PRs accepted.
+
+Small note: If editing the README, please conform to the [standard-readme](https://github.com/RichardLitt/standard-readme) specification.
+
+## License
+
+MIT © 2020 CareyWang
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..2d5184b
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,8 @@
+module github.com/CareyWang/bitly
+
+go 1.13
+
+require (
+	github.com/gin-gonic/gin v1.5.0
+	github.com/go-redis/redis/v7 v7.0.0-beta.5
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..529f77c
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,80 @@
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diff --git a/main.go b/main.go
new file mode 100644
index 0000000..3440c9c
--- /dev/null
+++ b/main.go
@@ -0,0 +1,139 @@
+package main
+
+import (
+	"bytes"
+	"encoding/json"
+	"flag"
+	"fmt"
+	"github.com/gin-gonic/gin"
+	"github.com/go-redis/redis/v7"
+	"io/ioutil"
+	"net/http"
+	"net/url"
+	"time"
+)
+
+type Response struct {
+	Code     int
+	Message  string
+	LongUrl  string
+	ShortUrl string
+}
+
+type Bitly struct {
+	CreatedAt      string        `json:"created_at"`
+	ID             string        `json:"id"`
+	Link           string        `json:"link"`
+	CustomBitlinks []interface{} `json:"custom_bitlinks"`
+	LongURL        string        `json:"long_url"`
+	Archived       bool          `json:"archived"`
+	Tags           []interface{} `json:"tags"`
+	Deeplinks      []interface{} `json:"deeplinks"`
+	References     struct {
+		Group string `json:"group"`
+	} `json:"references"`
+}
+
+// api文档：https://dev.bitly.com/v4_documentation.html
+const endPoint string = "https://api-ssl.bitly.com/v4/shorten"
+const defaultToken string = ""
+const defaultPort int = 8001
+
+func main() {
+	gin.SetMode(gin.ReleaseMode)
+	router := gin.Default()
+
+	token := flag.String("token", "", "Bitly api token")
+	port := flag.Int("port", defaultPort, "服务端口")
+	cache := flag.Int("cache", 0, "是否使用 redis 缓存")
+
+	flag.Parse()
+
+	if *token == "" {
+		panic("Bitly api token is required.")
+	}
+
+	router.GET("/", func(c *gin.Context) {
+		res := &Response{
+			Code:     0,
+			Message:  "",
+			LongUrl:  "",
+			ShortUrl: "",
+		}
+
+		longUrl := c.Query("longUrl")
+		if longUrl == "" {
+			res.Message = "longUrl为空"
+			c.JSON(400, *res)
+			return
+		}
+
+		longUrl, err := url.QueryUnescape(longUrl)
+		res.LongUrl = longUrl
+
+		// 先查缓存
+		redisClient := initRedis()
+		if 1 == *cache {
+			_shortUrl, err := redisClient.Get(longUrl).Result()
+			if err == nil && _shortUrl != "" {
+				res.LongUrl = _shortUrl
+				c.JSON(200, res)
+				return
+			}
+		}
+
+		contentType := "application/json"
+		postField := fmt.Sprintf("{\"long_url\":\"%s\"}", longUrl)
+		req, err := http.NewRequest("POST", endPoint, bytes.NewBuffer([]byte(postField)))
+		if err != nil {
+			res.Message = err.Error()
+			c.JSON(500, *res)
+			return
+		}
+
+		req.Header.Add("Content-Type", contentType)
+		req.Header.Add("Accept", contentType)
+		req.Header.Add("Host", "api-ssl.bitly.com")
+		req.Header.Add("Authorization", "Bearer "+*token)
+
+		client := &http.Client{}
+		resp, err := client.Do(req)
+		if err != nil {
+			res.Message = err.Error()
+			c.JSON(500, *res)
+			return
+		}
+		defer resp.Body.Close()
+
+		body, err := ioutil.ReadAll(resp.Body)
+
+		var bitly Bitly
+		err = json.Unmarshal(body, &bitly)
+
+		// 写缓存
+		res.ShortUrl = bitly.Link
+		if 1 == *cache {
+			ttl, err := time.ParseDuration("300s")
+			if err != nil {
+				res.Message = err.Error()
+				c.JSON(500, *res)
+				return
+			}
+
+			redisClient.Set(res.LongUrl, res.ShortUrl, ttl)
+		}
+
+		res.Code = 1
+		c.JSON(200, res)
+	})
+
+	router.Run(fmt.Sprintf(":%d", *port))
+}
+
+func initRedis() *redis.Client {
+	return redis.NewClient(&redis.Options{
+		Addr:     "localhost:6379",
+		Password: "", // no password set
+		DB:       0,  // use default DB
+	})
+}