commit 9ab243733d77825c7edaa103e46b98d57210c653
Author: xia <xiabin827@qq.com>
Date:   Mon Jan 13 22:58:50 2025 +0800

    first commit

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..723ef36
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.idea
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..d76674e
--- /dev/null
+++ b/README.md
@@ -0,0 +1,3 @@
+# douyin-openapi
+抖音openApi
+包含抖音小程序登录
\ No newline at end of file
diff --git a/access-token/access_token.go b/access-token/access_token.go
new file mode 100644
index 0000000..2978cae
--- /dev/null
+++ b/access-token/access_token.go
@@ -0,0 +1,132 @@
+package access_token
+
+import (
+	"encoding/json"
+	"fmt"
+	"gitea.youtukeji.com.cn/xiabin/douyin-openapi/cache"
+	"gitea.youtukeji.com.cn/xiabin/douyin-openapi/util"
+	"sync"
+	"time"
+)
+
+// 正式地址
+const accessTokenURL = "https://developer.toutiao.com/api/apps/v2/token"
+
+// 沙盒地址
+const sandBoxTokenURL = "https://open-sandbox.douyin.com/api/apps/v2/token"
+
+// AccessToken 管理AccessToken 的基础接口
+type AccessToken interface {
+	GetCacheKey() string             // 获取缓存的key
+	SetCacheKey(key string)          // 设置缓存key
+	GetAccessToken() (string, error) // 获取token
+}
+
+// accessTokenLock 初始化全局锁防止并发获取token
+var accessTokenLock = new(sync.Mutex)
+
+// DefaultAccessToken 默认的token管理类
+type DefaultAccessToken struct {
+	AppId               string      // app_id	string	是	小程序的 app_id
+	AppSecret           string      // app_secret	string	是	小程序的密钥
+	GrantType           string      // grant_type	string	是	固定值“client_credentials”
+	Cache               cache.Cache // 缓存组件
+	accessTokenLock     *sync.Mutex // 读写锁
+	accessTokenCacheKey string      // 缓存的key
+	SandBox             bool        // 是否沙盒地址 默认 false 线上地址
+}
+
+// NewDefaultAccessToken 实例化默认的token管理类
+func NewDefaultAccessToken(appId, appSecret string, cache cache.Cache, IsSandbox bool) AccessToken {
+	if cache == nil {
+		panic(any("cache is need"))
+	}
+	token := &DefaultAccessToken{
+		AppId:               appId,
+		AppSecret:           appSecret,
+		GrantType:           "client_credential",
+		Cache:               cache,
+		accessTokenCacheKey: fmt.Sprintf("douyin_openapi_access_token_%s", appId),
+		accessTokenLock:     accessTokenLock,
+		SandBox:             IsSandbox,
+	}
+	return token
+}
+
+// GetCacheKey 获取缓存key
+func (dd *DefaultAccessToken) GetCacheKey() string {
+	return dd.accessTokenCacheKey
+}
+
+// SetCacheKey 设置缓存key
+func (dd *DefaultAccessToken) SetCacheKey(key string) {
+	dd.accessTokenCacheKey = key
+}
+
+// GetAccessToken 获取token
+func (dd *DefaultAccessToken) GetAccessToken() (string, error) {
+	// 先尝试从缓存中获取如果不存在就调用接口获取
+	if val := dd.Cache.Get(dd.GetCacheKey()); val != nil {
+		return val.(string), nil
+	}
+
+	// 加锁防止并发获取接口
+	dd.accessTokenLock.Lock()
+	defer dd.accessTokenLock.Unlock()
+
+	// 双捡防止重复获取
+	if val := dd.Cache.Get(dd.GetCacheKey()); val != nil {
+		return val.(string), nil
+	}
+
+	// 开始调用接口获取token
+	api := accessTokenURL
+	if dd.SandBox {
+		api = sandBoxTokenURL
+	}
+	reqAccessToken, err := GetTokenFromServer(api, dd.AppId, dd.AppSecret)
+	if err != nil {
+		return "", err
+	}
+	// 设置缓存
+	expires := reqAccessToken.Data.ExpiresIn - 1500
+	err = dd.Cache.Set(dd.GetCacheKey(), reqAccessToken.Data.AccessToken, time.Duration(expires)*time.Second)
+	if err != nil {
+		return "", err
+	}
+	return reqAccessToken.Data.AccessToken, nil
+}
+
+// ResAccessToken 获取token的返回结构体
+type ResAccessToken struct {
+	ErrNo   int                `json:"err_no,omitempty"`
+	ErrTips string             `json:"err_tips,omitempty"`
+	Data    ResAccessTokenData `json:"data,omitempty"`
+}
+
+type ResAccessTokenData struct {
+	AccessToken string `json:"access_token,omitempty"`
+	ExpiresIn   int    `json:"expires_in,omitempty"`
+}
+
+// GetTokenFromServer 从抖音服务器获取token
+func GetTokenFromServer(apiUrl string, appId, appSecret string) (resAccessToken ResAccessToken, err error) {
+	params := map[string]interface{}{
+		"appid":      appId,
+		"secret":     appSecret,
+		"grant_type": "client_credential",
+	}
+	body, err := util.PostJSON(apiUrl, params)
+	if err != nil {
+		return
+	}
+	err = json.Unmarshal(body, &resAccessToken)
+	if err != nil {
+		return
+	}
+	if resAccessToken.ErrNo != 0 {
+		err = fmt.Errorf("get access_token error : errcode=%v , errormsg=%v", resAccessToken.ErrTips, resAccessToken.ErrNo)
+		return
+	}
+	return
+}
diff --git a/cache/cache.go b/cache/cache.go
new file mode 100644
index 0000000..b552982
--- /dev/null
+++ b/cache/cache.go
@@ -0,0 +1,76 @@
+package cache
+
+import (
+	"sync"
+	"time"
+)
+
+// Cache any
+type Cache interface {
+	Get(key string) any
+	Set(key string, val any, timeout time.Duration) error
+	IsExist(key string) bool
+	Delete(key string) error
+}
+
+// data 存储数据用的
+type data struct {
+	Data    any
+	Expired time.Time
+}
+
+// Memory 实现一个内存缓存
+type Memory struct {
+	sync.Map
+}
+
+var m = sync.Map{}
+
+// NewMemory 实例化一个内存缓存器
+func NewMemory() Cache {
+	return &Memory{
+		sync.Map{},
+	}
+}
+
+// Get 获取缓存的值
+func (mem *Memory) Get(key string) any {
+	if val, ok := mem.Load(key); ok {
+		val := val.(*data)
+		// 判断缓存是否过期
+		if val.Expired.Before(time.Now()) {
+			// 删除这个key
+			_ = mem.Delete(key)
+			return nil
+		}
+		return val.Data
+	}
+	return nil
+}
+
+// Set 设置一个值
+func (mem *Memory) Set(key string, val any, timeout time.Duration) error {
+	mem.Store(key, &data{
+		Data:    val,
+		Expired: time.Now().Add(timeout),
+	})
+	return nil
+}
+
+// IsExist 判断值是否存在
+func (mem *Memory) IsExist(key string) bool {
+	if val, ok := mem.Load(key); ok {
+		val := val.(*data)
+		if val.Expired.Before(time.Now()) {
+			return false
+		}
+		return true
+	}
+	return false
+}
+
+// Delete 删除一个值
+func (mem *Memory) Delete(key string) error {
+	return mem.Delete(key)
+
+}
diff --git a/douyin_openapi.go b/douyin_openapi.go
new file mode 100644
index 0000000..8999831
--- /dev/null
+++ b/douyin_openapi.go
@@ -0,0 +1,106 @@
+package douyin_openapi
+
+import (
+	"encoding/json"
+	"fmt"
+	accessToken "gitea.youtukeji.com.cn/xiabin/douyin-openapi/access-token"
+	"gitea.youtukeji.com.cn/xiabin/douyin-openapi/cache"
+	"gitea.youtukeji.com.cn/xiabin/douyin-openapi/util"
+)
+
+const (
+	code2Session = "/api/apps/v2/jscode2session" // 小程序登录地址
+)
+
+// DouYinOpenApiConfig 实例化配置
+type DouYinOpenApiConfig struct {
+	AppId       string
+	AppSecret   string
+	AccessToken accessToken.AccessToken
+	Cache       cache.Cache
+	IsSandbox   bool
+	Token       string
+	Salt        string
+}
+
+// DouYinOpenApi 基类
+type DouYinOpenApi struct {
+	Config  DouYinOpenApiConfig
+	BaseApi string
+}
+
+// NewDouYinOpenApi 实例化一个抖音openapi实例
+func NewDouYinOpenApi(config DouYinOpenApiConfig) *DouYinOpenApi {
+	if config.Cache == nil {
+		config.Cache = cache.NewMemory()
+	}
+	if config.AccessToken == nil {
+		config.AccessToken = accessToken.NewDefaultAccessToken(config.AppId, config.AppSecret, config.Cache, config.IsSandbox)
+	}
+	BaseApi := "https://developer.toutiao.com"
+	if config.IsSandbox {
+		BaseApi = "https://open-sandbox.douyin.com"
+	}
+	return &DouYinOpenApi{
+		Config:  config,
+		BaseApi: BaseApi,
+	}
+}
+
+// GetApiUrl 获取api地址
+func (d *DouYinOpenApi) GetApiUrl(url string) string {
+	return fmt.Sprintf("%s%s", d.BaseApi, url)
+}
+
+// PostJson 封装公共的请求方法
+func (d *DouYinOpenApi) PostJson(api string, params any, response any) (err error) {
+	body, err := util.PostJSON(api, params)
+	if err != nil {
+		return
+	}
+	err = json.Unmarshal(body, &response)
+	if err != nil {
+		return
+	}
+	return
+}
+
+// Code2SessionParams 小程序登录 所需参数
+type Code2SessionParams struct {
+	Appid         string `json:"appid,omitempty"`
+	Secret        string `json:"secret,omitempty"`
+	AnonymousCode string `json:"anonymous_code,omitempty"`
+	Code          string `json:"code,omitempty"`
+}
+
+// Code2SessionResponse 小程序登录返回值
+type Code2SessionResponse struct {
+	ErrNo   int                      `json:"err_no,omitempty"`
+	ErrTips string                   `json:"err_tips,omitempty"`
+	Data    Code2SessionResponseData `json:"data,omitempty"`
+}
+
+type Code2SessionResponseData struct {
+	SessionKey      string `json:"session_key,omitempty"`
+	Openid          string `json:"openid,omitempty"`
+	AnonymousOpenid string `json:"anonymous_openid,omitempty"`
+	UnionId         string `json:"unionid,omitempty"`
+}
+
+// Code2Session 小程序登录
+func (d *DouYinOpenApi) Code2Session(code, anonymousCode string) (code2SessionResponse Code2SessionResponse, err error) {
+	params := Code2SessionParams{
+		Appid:         d.Config.AppId,
+		Secret:        d.Config.AppSecret,
+		AnonymousCode: anonymousCode,
+		Code:          code,
+	}
+	err = d.PostJson(d.GetApiUrl(code2Session), params, &code2SessionResponse)
+	if err != nil {
+		return
+	}
+	if code2SessionResponse.ErrNo != 0 {
+		return code2SessionResponse, fmt.Errorf("小程序登录错误: %s %d", code2SessionResponse.ErrTips, code2SessionResponse.ErrNo)
+	}
+	return
+}
diff --git a/douyin_openapi_test.go b/douyin_openapi_test.go
new file mode 100644
index 0000000..0ca3a0d
--- /dev/null
+++ b/douyin_openapi_test.go
@@ -0,0 +1,62 @@
+package douyin_openapi
+
+import (
+	accessToken "gitea.youtukeji.com.cn/xiabin/douyin-openapi/access-token"
+	"gitea.youtukeji.com.cn/xiabin/douyin-openapi/cache"
+	"testing"
+)
+
+// 声明测试常量
+const (
+	AppId     = ""
+	AppSecret = ""
+	Token     = ""
+	Salt      = ""
+)
+
+// 声明一个缓存实例
+var Cache cache.Cache
+
+// 声明全局openApi实例
+var OpenApi *DouYinOpenApi
+
+func init() {
+	Cache = cache.NewMemory()
+	OpenApi = NewDouYinOpenApi(DouYinOpenApiConfig{
+		AppId:     AppId,
+		AppSecret: AppSecret,
+		IsSandbox: false,
+		Token:     Token,
+		Salt:      Salt,
+	})
+}
+
+// 测试获取新的token
+func TestDouyinOpenapi_NewDefaultAccessToken(t *testing.T) {
+	token := accessToken.NewDefaultAccessToken(AppId, AppSecret, Cache, true)
+	getAccessToken, err := token.GetAccessToken()
+	if err != nil {
+		t.Errorf("got a error: %s", err.Error())
+		return
+	}
+	t.Logf("got a value: %s", getAccessToken)
+}
+
+// 基准测试看获取token的次数?
+func BenchmarkDouyinOpenapi_NewDefaultAccessToken(b *testing.B) {
+	token := accessToken.NewDefaultAccessToken(AppId, AppSecret, Cache, true)
+	for i := 0; i < b.N; i++ {
+		getAccessToken, err := token.GetAccessToken()
+		b.Logf("get token: %s %+v", getAccessToken, err)
+	}
+}
+
+// 测试小程序登录
+func TestDouYinOpenApi_Code2Session(t *testing.T) {
+	session, err := OpenApi.Code2Session("1111", "")
+	if err != nil {
+		t.Errorf("got a error %s", err.Error())
+		return
+	}
+	t.Logf("got a value %+v", session)
+}
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..70fcfe8
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module gitea.youtukeji.com.cn/xiabin/douyin-openapi
+
+go 1.23.4
diff --git a/util/http.go b/util/http.go
new file mode 100644
index 0000000..788a26e
--- /dev/null
+++ b/util/http.go
@@ -0,0 +1,27 @@
+package util
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+)
+
+// PostJSON post json 数据请求
+func PostJSON(uri string, obj any) ([]byte, error) {
+	marshal, err := json.Marshal(obj)
+	if err != nil {
+		return nil, err
+	}
+	response, err := http.Post(uri, "application/json;charset=utf-8", bytes.NewBuffer(marshal))
+	if err != nil {
+		return nil, err
+	}
+	defer response.Body.Close()
+
+	if response.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("http get error : uri=%v , statusCode=%v", uri, response.StatusCode)
+	}
+	return io.ReadAll(response.Body)
+}