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package model
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import (
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"encoding/gob"
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"encoding/json"
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"fmt"
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"net/url"
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"path"
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"path/filepath"
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"strconv"
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"strings"
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"time"
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"github.com/cloudreve/Cloudreve/v3/pkg/cache"
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"github.com/cloudreve/Cloudreve/v3/pkg/util"
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"github.com/jinzhu/gorm"
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)
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// Policy 存储策略
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type Policy struct {
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// 表字段
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gorm.Model
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Name string
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Type string
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Server string
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BucketName string
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IsPrivate bool
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BaseURL string
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AccessKey string `gorm:"type:text"`
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SecretKey string `gorm:"type:text"`
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MaxSize uint64
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AutoRename bool
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DirNameRule string
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FileNameRule string
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IsOriginLinkEnable bool
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Options string `gorm:"type:text"`
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// 数据库忽略字段
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OptionsSerialized PolicyOption `gorm:"-"`
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}
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// PolicyOption 非公有的存储策略属性
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type PolicyOption struct {
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// Upyun访问Token
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Token string `json:"token"`
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// 允许的文件扩展名
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FileType []string `json:"file_type"`
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// MimeType
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MimeType string `json:"mimetype"`
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// OdRedirect Onedrive 重定向地址
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OdRedirect string `json:"od_redirect,omitempty"`
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// OdProxy Onedrive 反代地址
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OdProxy string `json:"od_proxy,omitempty"`
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// OdDriver OneDrive 驱动器定位符
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OdDriver string `json:"od_driver,omitempty"`
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// Region 区域代码
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Region string `json:"region,omitempty"`
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// ServerSideEndpoint 服务端请求使用的 Endpoint，为空时使用 Policy.Server 字段
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ServerSideEndpoint string `json:"server_side_endpoint,omitempty"`
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}
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var thumbSuffix = map[string][]string{
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"local": {},
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"qiniu": {".psd", ".jpg", ".jpeg", ".png", ".gif", ".webp", ".tiff", ".bmp"},
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"oss": {".jpg", ".jpeg", ".png", ".gif", ".webp", ".tiff", ".bmp"},
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"cos": {".jpg", ".jpeg", ".png", ".gif", ".webp", ".tiff", ".bmp"},
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"upyun": {".svg", ".jpg", ".jpeg", ".png", ".gif", ".webp", ".tiff", ".bmp"},
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"s3": {},
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"remote": {},
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"onedrive": {"*"},
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}
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func init() {
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// 注册缓存用到的复杂结构
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gob.Register(Policy{})
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}
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// GetPolicyByID 用ID获取存储策略
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func GetPolicyByID(ID interface{}) (Policy, error) {
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// 尝试读取缓存
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cacheKey := "policy_" + strconv.Itoa(int(ID.(uint)))
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if policy, ok := cache.Get(cacheKey); ok {
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return policy.(Policy), nil
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}
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var policy Policy
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result := DB.First(&policy, ID)
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// 写入缓存
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if result.Error == nil {
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_ = cache.Set(cacheKey, policy, -1)
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}
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return policy, result.Error
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}
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// AfterFind 找到存储策略后的钩子
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func (policy *Policy) AfterFind() (err error) {
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// 解析存储策略设置到OptionsSerialized
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if policy.Options != "" {
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err = json.Unmarshal([]byte(policy.Options), &policy.OptionsSerialized)
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}
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if policy.OptionsSerialized.FileType == nil {
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policy.OptionsSerialized.FileType = []string{}
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}
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return err
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}
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// BeforeSave Save策略前的钩子
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func (policy *Policy) BeforeSave() (err error) {
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err = policy.SerializeOptions()
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return err
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}
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//SerializeOptions 将序列后的Option写入到数据库字段
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func (policy *Policy) SerializeOptions() (err error) {
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optionsValue, err := json.Marshal(&policy.OptionsSerialized)
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policy.Options = string(optionsValue)
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return err
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}
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// GeneratePath 生成存储文件的路径
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func (policy *Policy) GeneratePath(uid uint, origin string) string {
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dirRule := policy.DirNameRule
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replaceTable := map[string]string{
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"{randomkey16}": util.RandStringRunes(16),
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"{randomkey8}": util.RandStringRunes(8),
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"{timestamp}": strconv.FormatInt(time.Now().Unix(), 10),
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"{timestamp_nano}": strconv.FormatInt(time.Now().UnixNano(), 10),
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"{uid}": strconv.Itoa(int(uid)),
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"{datetime}": time.Now().Format("20060102150405"),
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"{date}": time.Now().Format("20060102"),
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"{year}": time.Now().Format("2006"),
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"{month}": time.Now().Format("01"),
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"{day}": time.Now().Format("02"),
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"{hour}": time.Now().Format("15"),
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"{minute}": time.Now().Format("04"),
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"{second}": time.Now().Format("05"),
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"{path}": origin + "/",
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}
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dirRule = util.Replace(replaceTable, dirRule)
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return path.Clean(dirRule)
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}
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// GenerateFileName 生成存储文件名
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func (policy *Policy) GenerateFileName(uid uint, origin string) string {
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// 未开启自动重命名时，直接返回原始文件名
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if !policy.AutoRename {
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return policy.getOriginNameRule(origin)
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}
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fileRule := policy.FileNameRule
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replaceTable := map[string]string{
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"{randomkey16}": util.RandStringRunes(16),
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"{randomkey8}": util.RandStringRunes(8),
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"{timestamp}": strconv.FormatInt(time.Now().Unix(), 10),
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"{timestamp_nano}": strconv.FormatInt(time.Now().UnixNano(), 10),
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"{uid}": strconv.Itoa(int(uid)),
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"{datetime}": time.Now().Format("20060102150405"),
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"{date}": time.Now().Format("20060102"),
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"{year}": time.Now().Format("2006"),
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"{month}": time.Now().Format("01"),
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"{day}": time.Now().Format("02"),
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"{hour}": time.Now().Format("15"),
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"{minute}": time.Now().Format("04"),
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"{second}": time.Now().Format("05"),
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}
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replaceTable["{originname}"] = policy.getOriginNameRule(origin)
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fileRule = util.Replace(replaceTable, fileRule)
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return fileRule
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}
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func (policy Policy) getOriginNameRule(origin string) string {
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// 部分存储策略可以使用{origin}代表原始文件名
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if origin == "" {
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// 如果上游未传回原始文件名，则使用占位符，让云存储端替换
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switch policy.Type {
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case "qiniu":
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// 七牛会将$(fname)自动替换为原始文件名
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return "$(fname)"
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case "local", "remote":
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return origin
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case "oss", "cos":
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// OSS会将${filename}自动替换为原始文件名
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return "${filename}"
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case "upyun":
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// Upyun会将{filename}{.suffix}自动替换为原始文件名
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return "{filename}{.suffix}"
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}
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}
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return origin
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}
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// IsDirectlyPreview 返回此策略下文件是否可以直接预览（不需要重定向）
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func (policy *Policy) IsDirectlyPreview() bool {
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return policy.Type == "local"
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}
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// IsThumbExist 给定文件名，返回此存储策略下是否可能存在缩略图
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func (policy *Policy) IsThumbExist(name string) bool {
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if list, ok := thumbSuffix[policy.Type]; ok {
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if len(list) == 1 && list[0] == "*" {
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return true
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}
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return util.ContainsString(list, strings.ToLower(filepath.Ext(name)))
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}
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return false
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}
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// IsTransitUpload 返回此策略上传给定size文件时是否需要服务端中转
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func (policy *Policy) IsTransitUpload(size uint64) bool {
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if policy.Type == "local" {
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return true
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}
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if policy.Type == "onedrive" && size < 4*1024*1024 {
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return true
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}
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return false
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}
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// IsPathGenerateNeeded 返回此策略是否需要在生成上传凭证时生成存储路径
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func (policy *Policy) IsPathGenerateNeeded() bool {
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return policy.Type != "remote"
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}
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// IsThumbGenerateNeeded 返回此策略是否需要在上传后生成缩略图
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func (policy *Policy) IsThumbGenerateNeeded() bool {
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return policy.Type == "local"
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}
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// CanStructureBeListed 返回存储策略是否能被前台列物理目录
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func (policy *Policy) CanStructureBeListed() bool {
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return policy.Type != "local" && policy.Type != "remote"
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}
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// GetUploadURL 获取文件上传服务API地址
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func (policy *Policy) GetUploadURL() string {
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server, err := url.Parse(policy.Server)
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if err != nil {
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return policy.Server
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}
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controller, _ := url.Parse("")
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switch policy.Type {
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case "local", "onedrive":
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return "/api/v3/file/upload"
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case "remote":
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controller, _ = url.Parse("/api/v3/slave/upload")
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case "oss":
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return "https://" + policy.BucketName + "." + policy.Server
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case "cos":
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return policy.Server
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case "upyun":
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return "https://v0.api.upyun.com/" + policy.BucketName
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case "s3":
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if policy.Server == "" {
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return fmt.Sprintf("https://%s.s3.%s.amazonaws.com/", policy.BucketName,
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policy.OptionsSerialized.Region)
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}
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if !strings.Contains(policy.Server, policy.BucketName) {
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controller, _ = url.Parse("/" + policy.BucketName)
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}
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}
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return server.ResolveReference(controller).String()
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}
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// SaveAndClearCache 更新并清理缓存
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func (policy *Policy) SaveAndClearCache() error {
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err := DB.Save(policy).Error
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policy.ClearCache()
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return err
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}
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// ClearCache 清空policy缓存
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func (policy *Policy) ClearCache() {
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cache.Deletes([]string{strconv.FormatUint(uint64(policy.ID), 10)}, "policy_")
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}
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