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miniprogram.go
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miniprogram.go
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// Copyright 2020 FastWeGo
//
// 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.
/*
微信小程序开发 SDK
See: https://developers.weixin.qq.com/miniprogram/dev/api-backend/
*/
package miniprogram
import (
"log"
"os"
"github.com/faabiosr/cachego"
"github.com/faabiosr/cachego/file"
)
// GetAccessTokenFunc 获取 access_token 方法接口
type GetAccessTokenFunc func(ctx *Miniprogram) (accessToken string, err error)
/*
Miniprogram 实例
*/
type Miniprogram struct {
Config Config
AccessToken AccessToken
Client Client
Logger *log.Logger
}
/*
AccessToken 管理器 处理缓存 和 刷新 逻辑
*/
type AccessToken struct {
Cache cachego.Cache
GetAccessTokenHandler GetAccessTokenFunc
}
/*
小程序配置
*/
type Config struct {
Appid string
Secret string
}
/*
创建小程序实例
*/
func New(config Config) (miniprogram *Miniprogram) {
instance := Miniprogram{
Config: config,
AccessToken: AccessToken{
Cache: file.New(os.TempDir()),
GetAccessTokenHandler: GetAccessToken,
},
}
instance.Client = Client{Ctx: &instance}
instance.Logger = log.New(os.Stdout, "[miniprogram] ", log.LstdFlags|log.Llongfile)
return &instance
}
/*
SetAccessTokenCacheDriver 设置 AccessToken 缓存器 默认为文件缓存:目录 os.TempDir()
驱动接口类型 为 cachego.Cache
*/
func (miniprogram *Miniprogram) SetAccessTokenCacheDriver(driver cachego.Cache) {
miniprogram.AccessToken.Cache = driver
}
/*
SetGetAccessTokenHandler 设置 AccessToken 获取方法。默认 从本地缓存获取(过期从微信接口刷新)
如果有多实例服务,可以设置为 Redis 或 RPC 等中控服务器 获取 就可以避免 AccessToken 刷新冲突
*/
func (miniprogram *Miniprogram) SetGetAccessTokenHandler(f GetAccessTokenFunc) {
miniprogram.AccessToken.GetAccessTokenHandler = f
}
/*
SetLogger 日志记录 默认输出到 os.Stdout
可以新建 logger 输出到指定文件
如果不想开启日志,可以输出到 /dev/null log.SetOutput(ioutil.Discard)
*/
func (miniprogram *Miniprogram) SetLogger(logger *log.Logger) {
miniprogram.Logger = logger
}