140 lines
3.9 KiB
Go
140 lines
3.9 KiB
Go
package share
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import (
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"context"
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"fmt"
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model "github.com/HFO4/cloudreve/models"
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"github.com/HFO4/cloudreve/pkg/filesystem"
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"github.com/HFO4/cloudreve/pkg/filesystem/fsctx"
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"github.com/HFO4/cloudreve/pkg/serializer"
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"github.com/HFO4/cloudreve/pkg/util"
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"github.com/HFO4/cloudreve/service/explorer"
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"github.com/gin-gonic/gin"
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)
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// ShareGetService 获取分享服务
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type ShareGetService struct {
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Password string `form:"password" binding:"max=255"`
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}
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// SingleFileService 对单文件进行操作的服务，path为可选文件完整路径
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type SingleFileService struct {
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Path string `form:"path" binding:"max=65535"`
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}
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// Get 获取分享内容
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func (service *ShareGetService) Get(c *gin.Context) serializer.Response {
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user := currentUser(c)
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share := model.GetShareByHashID(c.Param("id"))
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if share == nil || !share.IsAvailable() {
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return serializer.Err(serializer.CodeNotFound, "分享不存在或已被取消", nil)
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}
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// 是否已解锁
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unlocked := true
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if share.Password != "" {
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sessionKey := fmt.Sprintf("share_unlock_%d", share.ID)
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unlocked = util.GetSession(c, sessionKey) != nil
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if !unlocked && service.Password != "" {
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// 如果未解锁，且指定了密码，则尝试解锁
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if service.Password == share.Password {
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unlocked = true
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util.SetSession(c, map[string]interface{}{sessionKey: true})
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}
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}
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}
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if unlocked {
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share.Viewed()
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}
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// 如果已经下载过，不需要付积分
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if share.WasDownloadedBy(user) {
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share.Score = 0
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}
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return serializer.Response{
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Code: 0,
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Data: serializer.BuildShareResponse(share, unlocked),
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}
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}
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// CreateDownloadSession 创建下载会话
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func (service *SingleFileService) CreateDownloadSession(c *gin.Context) serializer.Response {
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user := currentUser(c)
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share := model.GetShareByHashID(c.Param("id"))
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if share == nil || !share.IsAvailable() {
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return serializer.Err(serializer.CodeNotFound, "分享不存在或已被取消", nil)
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}
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// 检查用户是否可以下载此分享的文件
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err := CheckBeforeGetShare(share, user)
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if err != nil {
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return serializer.Err(serializer.CodeNoPermissionErr, err.Error(), nil)
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}
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// 创建文件系统
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fs, err := filesystem.NewFileSystem(user)
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if err != nil {
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return serializer.Err(serializer.CodePolicyNotAllowed, err.Error(), err)
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}
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defer fs.Recycle()
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// 重设文件系统处理目标为源文件
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err = fs.SetTargetByInterface(share.GetSource())
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if err != nil {
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return serializer.Err(serializer.CodePolicyNotAllowed, "源文件不存在", err)
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}
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// 取得下载地址
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downloadURL, err := fs.GetDownloadURL(context.Background(), "", "download_timeout")
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if err != nil {
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return serializer.Err(serializer.CodeNotSet, err.Error(), err)
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}
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return serializer.Response{
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Code: 0,
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Data: downloadURL,
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}
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}
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// PreviewContent 预览文件，需要登录会话, isText - 是否为文本文件，文本文件会
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// 强制经由服务端中转
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func (service *SingleFileService) PreviewContent(ctx context.Context, c *gin.Context, isText bool) serializer.Response {
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user := currentUser(c)
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share := model.GetShareByHashID(c.Param("id"))
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if share == nil || !share.IsAvailable() {
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return serializer.Err(serializer.CodeNotFound, "分享不存在或已被取消", nil)
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}
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// 检查用户是否可以下载此分享的文件
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err := CheckBeforeGetShare(share, user)
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if err != nil {
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return serializer.Err(serializer.CodeNoPermissionErr, err.Error(), nil)
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}
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// 用于调用子service
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ctx = context.WithValue(ctx, fsctx.FileModelCtx, share.GetSource())
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subService := explorer.SingleFileService{
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Path: "",
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}
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return subService.PreviewContent(ctx, c, isText)
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}
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// CheckBeforeGetShare 获取分享内容/下载前进行的一系列检查
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func CheckBeforeGetShare(share *model.Share, user *model.User) error {
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// 检查用户是否可以下载此分享的文件
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err := share.CanBeDownloadBy(user)
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if err != nil {
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return err
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}
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// 对积分、下载次数进行更新
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err = share.DownloadBy(user)
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if err != nil {
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return err
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}
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return nil
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}
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