add douyincloud-gin-demo

Dockerfile

+FROM public-cn-beijing.cr.volces.com/public/base:golang-1.17.1-alpine3.14 as builder
+# 指定构建过程中的工作目录
+WORKDIR /app
+# 将当前目录（dockerfile所在目录）下所有文件都拷贝到工作目录下（.dockerignore中文件除外）
+COPY . /app/
+
+# 执行代码编译命令。操作系统参数为linux，编译后的二进制产物命名为main，并存放在当前目录下。
+RUN GOPROXY=https://goproxy.cn,direct GOOS=linux GOARCH=amd64 go build -o main .
+
+FROM public-cn-beijing.cr.volces.com/public/base:alpine-3.13
+
+WORKDIR /opt/application
+
+COPY --from=builder /app/main /app/run.sh /opt/application/
+
+USER root
+
+RUN chmod -R 777 /app/run.sh
+
+CMD /opt/application/run.sh

LICENSE

+Copyright (year) Bytedance Inc.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
\ No newline at end of file

README.md

+# douyincloud-gin-demo
+本项目是抖音云平台基于go语言gin框架的开发模版，模版通过使用Redis和MongoDB实现了简单的hello-world功能。\
+抖音云平台支持基于Git代码和Docker镜像部署两种方式。其中，Dockerfile文件可以参考本项目中的Dockerfile文件。
+部署在抖音云平台的服务日志需要重定向到标准输出，并在抖音云平台日志功能中查看。
+
+## 目录结构
+~~~
+.
+├── Dockerfile              Dockerfile文件
+├── Readme.md               Readme文件
+├── component               组件目录
+│ ├── mongo.go              mongo组件
+│ ├── redis.go              redis组件        
+│ └── types.go              组件接口声明
+├── go.mod                  go.mod文件
+├── go.sum                  go.sum文件
+├── main.go                 主函数入口
+├── run.sh                  容器运行时启动文件
+└── service                 业务逻辑目录
+    └── service.go          业务逻辑文件
+~~~
+
+## 请求方法
+前往抖音云托管平台「调试」功能界面，进行请求调试。
+
+## API说明
+### `GET /api/hello`
+对组件打招呼
+
+### 请求参数
+- `target`：`string` 组件名：redis，mongodb
+
+### 响应结果
+```json
+{
+    "err_no": 0,
+    "err_msg": "success",
+    "data": "hello,redis"
+}
+```
+
+### `POST /api/set_name`
+给组件设置名称
+
+### 请求参数
+- `target`:`string` 组件名：redis，mongodb
+- `name`:`string` 名称
+
+### 响应结果
+```json
+{
+    "err_no": 0,
+    "err_msg": "success",
+    "data": ""
+}
+```
+
+### 组件使用注意事项
+在抖音云托管平台上启用组件后，抖音云平台会自动将组件的地址，账号，密码以环境变量的方式注入到容器中。\
+以Redis为例，在抖音云托管平台启用Redis组件后，平台会生成 `REDIS_ADDRESS`，`REDIS_USERNAME`，`REDIS_PASSWORD`三个环境变量，在业务代码中可以使用如下代码获取相应值。
+```
+	redisAddr := os.Getenv("REDIS_ADDRESS")
+	redisUserName := os.Getenv("REDIS_USERNAME")
+	redisPassword := os.Getenv("REDIS_PASSWORD")
+```
+
+## License
+
+This project is licensed under the [Apache-2.0 License](LICENSE).
+

component/mongo.go

+/*
+Copyright (year) Bytedance Inc.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package component
+
+import (
+	"context"
+	"fmt"
+	"go.mongodb.org/mongo-driver/bson"
+	"go.mongodb.org/mongo-driver/mongo"
+	"go.mongodb.org/mongo-driver/mongo/options"
+	"net/url"
+	"os"
+	"time"
+)
+
+var (
+	// mongo地址
+	mongoAddr = ""
+	// mongo用户名
+	mongoUserName = ""
+	// mongo密码
+	mongoPassWord = ""
+)
+
+const collectionName = "demo"
+
+type mongoComponent struct {
+	client   *mongo.Client
+	dataBase string
+}
+
+type model struct {
+	Key   string `bson:"key"`   //类型
+	Value string `bson:"value"` //值
+}
+
+func (m *mongoComponent) GetName(ctx context.Context, key string) (name string, err error) {
+
+	coll := m.client.Database(m.dataBase).Collection(collectionName)
+	doc := &model{}
+
+	filter := bson.M{"key": key}
+	result := coll.FindOne(ctx, filter)
+
+	if err := result.Decode(doc); err != nil {
+		return "", err
+	}
+	return doc.Value, err
+}
+
+func (m *mongoComponent) SetName(ctx context.Context, key string, name string) error {
+
+	coll := m.client.Database(m.dataBase).Collection(collectionName)
+
+	filter := bson.M{"key": key}
+	update := bson.M{"$set": model{Key: key, Value: name}}
+	_, err := coll.UpdateMany(ctx, filter, update)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+//NewMongoComponent 新建一个mongodbComponent，其实现了HelloWorldComponent接口
+func NewMongoComponent() *mongoComponent {
+
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+	tmp, err := url.Parse(mongoAddr)
+	if err != nil {
+		panic("mongo addr parse error")
+	}
+	authSource := tmp.Query().Get("authSource")
+	credential := options.Credential{
+		AuthSource: authSource,
+		Username:   mongoUserName,
+		Password:   mongoPassWord,
+	}
+	mongoUrl := fmt.Sprintf("mongodb://%s", mongoAddr)
+
+	client, err := mongo.Connect(ctx, options.Client().ApplyURI(mongoUrl).SetAuth(credential))
+	if err != nil {
+		fmt.Printf("mongoClient init error. err %s\n", err)
+		panic("mongo connect error")
+	}
+	return &mongoComponent{client, "demo"}
+}
+
+//init 项目启动时，会从环境变量中获取mongodb的地址，用户名和密码
+func init() {
+	mongoAddr = os.Getenv("MONGO_ADDRESS")
+	mongoUserName = os.Getenv("MONGO_USERNAME")
+	mongoPassWord = os.Getenv("MONGO_PASSWORD")
+}

component/redis.go

+/*
+Copyright (year) Bytedance Inc.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package component
+
+import (
+	"context"
+	"fmt"
+	"github.com/go-redis/redis/v8"
+	"os"
+)
+
+var (
+	//Redis地址
+	redisAddr = ""
+	//Redis用户名
+	redisUserName = ""
+	//Redis密码
+	redisPassword = ""
+)
+
+type redisComponent struct {
+	client *redis.Client
+}
+
+func (r *redisComponent) GetName(ctx context.Context, key string) (name string, err error) {
+	return r.client.Get(ctx, key).Result()
+}
+
+func (r *redisComponent) SetName(ctx context.Context, key string, name string) error {
+	_, err := r.client.Set(ctx, key, name, 0).Result()
+	return err
+}
+
+//NewRedisComponent 初始化一个实现了HelloWorldComponent接口的RedisComponent
+func NewRedisComponent() *redisComponent {
+	rdb := redis.NewClient(&redis.Options{
+		Addr:     redisAddr,
+		Username: redisUserName,
+		Password: redisPassword,
+		DB:       0, // use default DB
+	})
+	_, err := rdb.Ping(context.TODO()).Result()
+	if err != nil {
+		fmt.Printf("redisClient init error. err %s", err)
+		panic(fmt.Sprintf("redis init failed. err %s\n", err))
+	}
+	return &redisComponent{
+		client: rdb,
+	}
+}
+
+//init 项目启动时会从环境变量中获取
+func init() {
+	redisAddr = os.Getenv("REDIS_ADDRESS")
+	redisUserName = os.Getenv("REDIS_USERNAME")
+	redisPassword = os.Getenv("REDIS_PASSWORD")
+}

component/types.go

+/*
+Copyright (year) Bytedance Inc.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package component
+
+import (
+	"context"
+	"fmt"
+)
+
+type HelloWorldComponent interface {
+	GetName(ctx context.Context, key string) (name string, err error)
+	SetName(ctx context.Context, key string, name string) error
+}
+
+const Mongo = "mongodb"
+const Redis = "redis"
+
+var (
+	mongoHelloWorld *mongoComponent
+	redisHelloWorld *redisComponent
+)
+
+//GetComponent 通过传入的component的名称返回实现了HelloWorldComponent接口的component
+func GetComponent(component string) (HelloWorldComponent, error) {
+	switch component {
+	case Mongo:
+		return mongoHelloWorld, nil
+	case Redis:
+		return redisHelloWorld, nil
+	default:
+		return nil, fmt.Errorf("invalid component")
+	}
+}
+
+func InitComponents() {
+	mongoHelloWorld = NewMongoComponent()
+	redisHelloWorld = NewRedisComponent()
+	ctx := context.TODO()
+	err := mongoHelloWorld.SetName(ctx, "name", "mongodb")
+	if err != nil {
+		panic(err)
+	}
+	err = redisHelloWorld.SetName(ctx, "name", "redis")
+	if err != nil {
+		panic(err)
+	}
+}

go.mod

+module douyincloud-gin-demo
+
+go 1.18
+
+require (
+	github.com/gin-gonic/gin v1.8.1
+	github.com/go-redis/redis/v8 v8.11.5
+	go.mongodb.org/mongo-driver v1.10.0
+)
+
+require (
+	github.com/cespare/xxhash/v2 v2.1.2 // indirect
+	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
+	github.com/gin-contrib/sse v0.1.0 // indirect
+	github.com/go-playground/locales v0.14.0 // indirect
+	github.com/go-playground/universal-translator v0.18.0 // indirect
+	github.com/go-playground/validator/v10 v10.10.0 // indirect
+	github.com/goccy/go-json v0.9.7 // indirect
+	github.com/golang/snappy v0.0.1 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/klauspost/compress v1.13.6 // indirect
+	github.com/leodido/go-urn v1.2.1 // indirect
+	github.com/mattn/go-isatty v0.0.14 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421 // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/montanaflynn/stats v0.0.0-20171201202039-1bf9dbcd8cbe // indirect
+	github.com/pelletier/go-toml/v2 v2.0.1 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/ugorji/go/codec v1.2.7 // indirect
+	github.com/xdg-go/pbkdf2 v1.0.0 // indirect
+	github.com/xdg-go/scram v1.1.1 // indirect
+	github.com/xdg-go/stringprep v1.0.3 // indirect
+	github.com/youmark/pkcs8 v0.0.0-20181117223130-1be2e3e5546d // indirect
+	golang.org/x/crypto v0.0.0-20220622213112-05595931fe9d // indirect
+	golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2 // indirect
+	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c // indirect
+	golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e // indirect
+	golang.org/x/text v0.3.7 // indirect
+	google.golang.org/protobuf v1.28.0 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+)

go.sum

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main.go

+/*
+Copyright (year) Bytedance Inc.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package main
+
+import (
+	"douyincloud-gin-demo/component"
+	"douyincloud-gin-demo/service"
+	"github.com/gin-gonic/gin"
+)
+
+func main() {
+	component.InitComponents()
+	r := gin.Default()
+
+	r.GET("/api/hello", service.Hello)
+	r.POST("/api/set_name", service.SetName)
+
+	r.Run(":8000")
+}

run.sh

+#!/bin/sh
+cd /opt/application/ && ./main
\ No newline at end of file

service/service.go

+/*
+Copyright (year) Bytedance Inc.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package service
+
+import (
+	"douyincloud-gin-demo/component"
+	"fmt"
+	"github.com/gin-gonic/gin"
+)
+
+func Hello(ctx *gin.Context) {
+	target := ctx.Query("target")
+	if target == "" {
+		Failure(ctx, fmt.Errorf("param invalid"))
+		return
+	}
+	fmt.Printf("target= %s\n", target)
+	hello, err := component.GetComponent(target)
+	if err != nil {
+		Failure(ctx, fmt.Errorf("param invalid"))
+		return
+	}
+
+	name, err := hello.GetName(ctx, "name")
+	if err != nil {
+		Failure(ctx, err)
+		return
+	}
+	Success(ctx, name)
+}
+
+func SetName(ctx *gin.Context) {
+	var req SetNameReq
+	err := ctx.Bind(&req)
+	if err != nil {
+		Failure(ctx, err)
+		return
+	}
+	hello, err := component.GetComponent(req.Target)
+	if err != nil {
+		Failure(ctx, fmt.Errorf("param invalid"))
+		return
+	}
+	err = hello.SetName(ctx, "name", req.Name)
+	if err != nil {
+		Failure(ctx, err)
+		return
+	}
+	Success(ctx, "")
+}
+
+func Failure(ctx *gin.Context, err error) {
+	resp := &Resp{
+		ErrNo:  -1,
+		ErrMsg: err.Error(),
+	}
+	ctx.JSON(200, resp)
+}
+
+func Success(ctx *gin.Context, data string) {
+	resp := &Resp{
+		ErrNo:  0,
+		ErrMsg: "success",
+		Data:   data,
+	}
+	ctx.JSON(200, resp)
+}
+
+type HelloResp struct {
+	ErrNo  int    `json:"err_no"`
+	ErrMsg string `json:"err_msg"`
+	Data   string `json:"data"`
+}
+
+type SetNameReq struct {
+	Target string `json:"target"`
+	Name   string `json:"name"`
+}
+
+type Resp struct {
+	ErrNo  int         `json:"err_no"`
+	ErrMsg string      `json:"err_msg"`
+	Data   interface{} `json:"data"`
+}