59 lines
1.6 KiB
JavaScript
59 lines
1.6 KiB
JavaScript
const crypto = require('crypto')
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const createConfig = require('uni-config-center')
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const config = createConfig({
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pluginId: 'uni-cms'
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}).config()
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const unlockRecordDBName = 'uni-cms-unlock-record'
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// 定义云函数
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exports.main = async function (event) {
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// 解构 event 对象
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const {trans_id, extra: _extra, sign} = event
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let extra = {}
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try {
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extra = JSON.parse(_extra)
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} catch (e) {}
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// 如果 adConfig 或 securityKey 配置项不存在,则抛出错误引导用户配置参数
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if (!config.adConfig || !config.adConfig.securityKey) throw new Error('请先配置adConfig.securityKey')
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// 如果 extra.article_id 不存在,则返回 null
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if (!extra.article_id) return null
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// 签名验证
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const reSign = crypto.createHash('sha256').update(`${config.adConfig.securityKey}:${trans_id}`).digest('hex')
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if (sign !== reSign) {
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console.log('签名错误', `${config.adConfig.securityKey}:${trans_id}`)
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return null
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}
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// 获取数据库实例
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const db = uniCloud.database()
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// 查询解锁记录
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const unlockRecord = await db.collection(unlockRecordDBName).where({
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trans_id
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}).get()
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// 如果已经解锁过了,则返回 null
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if (unlockRecord.data.length) {
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console.log('已经解锁过了')
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return null // 已经解锁过了
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}
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// 添加解锁记录
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await db.collection(unlockRecordDBName).add({
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unique_id: extra.unique_id,
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unique_type: extra.unique_type,
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article_id: extra.article_id,
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trans_id,
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create_date: Date.now()
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})
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console.log('解锁成功')
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// 应广告规范,需返回 isValid 为 true
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return {
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isValid: true
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}
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}
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