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package explorer
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import (
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"context"
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"encoding/base64"
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"encoding/json"
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"fmt"
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model "github.com/HFO4/cloudreve/models"
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"github.com/HFO4/cloudreve/pkg/cache"
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"github.com/HFO4/cloudreve/pkg/filesystem"
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"github.com/HFO4/cloudreve/pkg/filesystem/driver/local"
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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/gin-gonic/gin"
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"github.com/jinzhu/gorm"
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"net/http"
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"net/url"
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"strconv"
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"time"
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)
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// SingleFileService 对单文件进行操作的五福,path为文件完整路径
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type SingleFileService struct {
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Path string `uri:"path" binding:"required,min=1,max=65535"`
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}
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// FileIDService 通过文件ID对文件进行操作的服务
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type FileIDService struct {
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}
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// FileAnonymousGetService 匿名(外链)获取文件服务
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type FileAnonymousGetService struct {
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ID uint `uri:"id" binding:"required,min=1"`
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Name string `uri:"name" binding:"required"`
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}
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// DownloadService 文件下載服务
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type DownloadService struct {
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ID string `uri:"id" binding:"required"`
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}
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// SlaveDownloadService 从机文件下載服务
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type SlaveDownloadService struct {
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PathEncoded string `uri:"path" binding:"required"`
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Name string `uri:"name" binding:"required"`
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Speed int `uri:"speed" binding:"min=0"`
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}
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// SlaveFileService 从机单文件文件相关服务
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type SlaveFileService struct {
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PathEncoded string `uri:"path" binding:"required"`
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}
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// SlaveFilesService 从机多文件相关服务
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type SlaveFilesService struct {
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Files []string `json:"files" binding:"required,gt=0"`
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}
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// DownloadArchived 下載已打包的多文件
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func (service *DownloadService) DownloadArchived(ctx context.Context, c *gin.Context) serializer.Response {
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// 创建文件系统
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fs, err := filesystem.NewFileSystemFromContext(c)
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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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// 查找打包的临时文件
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zipPath, exist := cache.Get("archive_" + service.ID)
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if !exist {
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return serializer.Err(404, "归档文件不存在", nil)
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}
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// 获取文件流
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rs, err := fs.GetPhysicalFileContent(ctx, zipPath.(string))
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defer rs.Close()
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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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if fs.User.Group.OptionsSerialized.OneTimeDownload {
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// 清理资源,删除临时文件
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_ = cache.Deletes([]string{service.ID}, "archive_")
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}
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c.Header("Content-Disposition", "attachment;")
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c.Header("Content-Type", "application/zip")
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http.ServeContent(c.Writer, c.Request, "", time.Now(), rs)
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return serializer.Response{
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Code: 0,
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}
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}
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// Download 签名的匿名文件下载
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func (service *FileAnonymousGetService) Download(ctx context.Context, c *gin.Context) serializer.Response {
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fs, err := filesystem.NewAnonymousFileSystem()
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if err != nil {
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return serializer.Err(serializer.CodeGroupNotAllowed, err.Error(), err)
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}
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defer fs.Recycle()
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// 查找文件
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err = fs.SetTargetFileByIDs([]uint{service.ID})
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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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// 获取文件流
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rs, err := fs.GetDownloadContent(ctx, 0)
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defer rs.Close()
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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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// 发送文件
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http.ServeContent(c.Writer, c.Request, service.Name, fs.FileTarget[0].UpdatedAt, rs)
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return serializer.Response{
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Code: 0,
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}
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}
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// CreateDocPreviewSession 创建DOC文件预览会话,返回预览地址
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func (service *FileIDService) CreateDocPreviewSession(ctx context.Context, c *gin.Context) serializer.Response {
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// 创建文件系统
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fs, err := filesystem.NewFileSystemFromContext(c)
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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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// 如果上下文中已有File对象,则重设目标
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if file, ok := ctx.Value(fsctx.FileModelCtx).(*model.File); ok {
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fs.SetTargetFile(&[]model.File{*file})
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}
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// 重设根目录
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if folder, ok := ctx.Value(fsctx.FolderModelCtx).(*model.Folder); ok {
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fs.Root = folder
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}
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// 获取对象id
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objectID, _ := c.Get("object_id")
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// 获取文件临时下载地址
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downloadURL, err := fs.GetDownloadURL(ctx, objectID.(uint), "doc_preview_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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// 生成最终的预览器地址
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// TODO 从配置文件中读取
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viewerBase, _ := url.Parse("https://view.officeapps.live.com/op/view.aspx")
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params := viewerBase.Query()
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params.Set("src", downloadURL)
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viewerBase.RawQuery = params.Encode()
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return serializer.Response{
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Code: 0,
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Data: viewerBase.String(),
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}
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}
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// CreateDownloadSession 创建下载会话,获取下载URL
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func (service *FileIDService) CreateDownloadSession(ctx context.Context, c *gin.Context) serializer.Response {
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// 创建文件系统
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fs, err := filesystem.NewFileSystemFromContext(c)
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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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// 获取对象id
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objectID, _ := c.Get("object_id")
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// 获取下载地址
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downloadURL, err := fs.GetDownloadURL(ctx, objectID.(uint), "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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// Download 通过签名URL的文件下载,无需登录
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func (service *DownloadService) Download(ctx context.Context, c *gin.Context) serializer.Response {
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// 创建文件系统
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fs, err := filesystem.NewFileSystemFromContext(c)
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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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// 查找打包的临时文件
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file, exist := cache.Get("download_" + service.ID)
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if !exist {
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return serializer.Err(404, "文件下载会话不存在", nil)
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}
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fs.FileTarget = []model.File{file.(model.File)}
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// 开始处理下载
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ctx = context.WithValue(ctx, fsctx.GinCtx, c)
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rs, err := fs.GetDownloadContent(ctx, 0)
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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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defer rs.Close()
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// 设置文件名
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c.Header("Content-Disposition", "attachment; filename=\""+url.PathEscape(fs.FileTarget[0].Name)+"\"")
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if fs.User.Group.OptionsSerialized.OneTimeDownload {
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// 清理资源,删除临时文件
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_ = cache.Deletes([]string{service.ID}, "download_")
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}
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// 发送文件
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http.ServeContent(c.Writer, c.Request, fs.FileTarget[0].Name, fs.FileTarget[0].UpdatedAt, rs)
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return serializer.Response{
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Code: 0,
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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 *FileIDService) PreviewContent(ctx context.Context, c *gin.Context, isText bool) serializer.Response {
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// 创建文件系统
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fs, err := filesystem.NewFileSystemFromContext(c)
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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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// 如果上下文中已有File对象,则重设目标
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if file, ok := ctx.Value(fsctx.FileModelCtx).(*model.File); ok {
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fs.SetTargetFile(&[]model.File{*file})
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}
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// 如果上下文中已有Folder对象,则重设根目录
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if folder, ok := ctx.Value(fsctx.FolderModelCtx).(*model.Folder); ok {
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fs.Root = folder
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}
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// 获取对象id
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objectID, _ := c.Get("object_id")
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// 获取文件预览响应
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resp, err := fs.Preview(ctx, objectID.(uint), isText)
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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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// 重定向到文件源
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if resp.Redirect {
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return serializer.Response{
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Code: -301,
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Data: resp.URL,
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}
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}
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// 直接返回文件内容
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defer resp.Content.Close()
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if isText {
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c.Header("Cache-Control", "no-cache")
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}
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http.ServeContent(c.Writer, c.Request, fs.FileTarget[0].Name, fs.FileTarget[0].UpdatedAt, resp.Content)
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return serializer.Response{
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Code: 0,
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}
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}
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// PutContent 更新文件内容
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func (service *FileIDService) PutContent(ctx context.Context, c *gin.Context) serializer.Response {
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// 创建上下文
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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// 取得文件大小
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fileSize, err := strconv.ParseUint(c.Request.Header.Get("Content-Length"), 10, 64)
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if err != nil {
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return serializer.ParamErr("无法解析文件尺寸", err)
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}
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fileData := local.FileStream{
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MIMEType: c.Request.Header.Get("Content-Type"),
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File: c.Request.Body,
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Size: fileSize,
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}
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// 创建文件系统
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fs, err := filesystem.NewFileSystemFromContext(c)
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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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uploadCtx := context.WithValue(ctx, fsctx.GinCtx, c)
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// 取得现有文件
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fileID, _ := c.Get("object_id")
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originFile, _ := model.GetFilesByIDs([]uint{fileID.(uint)}, fs.User.ID)
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if len(originFile) == 0 {
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return serializer.Err(404, "文件不存在", nil)
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}
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fileData.Name = originFile[0].Name
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// 检查此文件是否有软链接
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fileList, err := model.RemoveFilesWithSoftLinks([]model.File{originFile[0]})
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if err == nil && len(fileList) == 0 {
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// 如果包含软连接,应重新生成新文件副本,并更新source_name
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originFile[0].SourceName = fs.GenerateSavePath(uploadCtx, fileData)
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fs.Use("AfterUpload", filesystem.HookUpdateSourceName)
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fs.Use("AfterUploadCanceled", filesystem.HookUpdateSourceName)
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fs.Use("AfterValidateFailed", filesystem.HookUpdateSourceName)
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}
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// 给文件系统分配钩子
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fs.Use("BeforeUpload", filesystem.HookValidateFile)
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fs.Use("BeforeUpload", filesystem.HookResetPolicy)
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fs.Use("BeforeUpload", filesystem.HookChangeCapacity)
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fs.Use("AfterUploadCanceled", filesystem.HookCleanFileContent)
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fs.Use("AfterUploadCanceled", filesystem.HookClearFileSize)
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fs.Use("AfterUploadCanceled", filesystem.HookGiveBackCapacity)
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fs.Use("AfterUpload", filesystem.GenericAfterUpdate)
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fs.Use("AfterValidateFailed", filesystem.HookCleanFileContent)
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fs.Use("AfterValidateFailed", filesystem.HookClearFileSize)
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fs.Use("AfterValidateFailed", filesystem.HookGiveBackCapacity)
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// 执行上传
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uploadCtx = context.WithValue(uploadCtx, fsctx.FileModelCtx, originFile[0])
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err = fs.Upload(uploadCtx, fileData)
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if err != nil {
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return serializer.Err(serializer.CodeUploadFailed, err.Error(), err)
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}
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return serializer.Response{
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Code: 0,
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}
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}
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// ServeFile 通过签名的URL下载从机文件
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func (service *SlaveDownloadService) ServeFile(ctx context.Context, c *gin.Context, isDownload bool) serializer.Response {
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// 创建文件系统
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fs, err := filesystem.NewAnonymousFileSystem()
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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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// 解码文件路径
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fileSource, err := base64.RawURLEncoding.DecodeString(service.PathEncoded)
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if err != nil {
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return serializer.ParamErr("无法解析的文件地址", err)
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}
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// 根据URL里的信息创建一个文件对象和用户对象
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file := model.File{
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Name: service.Name,
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SourceName: string(fileSource),
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Policy: model.Policy{
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Model: gorm.Model{ID: 1},
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Type: "local",
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},
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}
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fs.User = &model.User{
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Group: model.Group{SpeedLimit: service.Speed},
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}
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fs.FileTarget = []model.File{file}
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// 开始处理下载
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ctx = context.WithValue(ctx, fsctx.GinCtx, c)
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rs, err := fs.GetDownloadContent(ctx, 0)
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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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defer rs.Close()
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// 设置下载文件名
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if isDownload {
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c.Header("Content-Disposition", "attachment; filename=\""+url.PathEscape(fs.FileTarget[0].Name)+"\"")
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}
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// 发送文件
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http.ServeContent(c.Writer, c.Request, fs.FileTarget[0].Name, time.Now(), rs)
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return serializer.Response{
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Code: 0,
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}
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}
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// Delete 通过签名的URL删除从机文件
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func (service *SlaveFilesService) Delete(ctx context.Context, c *gin.Context) serializer.Response {
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// 创建文件系统
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fs, err := filesystem.NewAnonymousFileSystem()
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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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// 删除文件
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failed, err := fs.Handler.Delete(ctx, service.Files)
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if err != nil {
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// 将Data字段写为字符串方便主控端解析
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data, _ := json.Marshal(serializer.RemoteDeleteRequest{Files: failed})
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return serializer.Response{
|
|
|
Code: serializer.CodeNotFullySuccess,
|
|
|
Data: string(data),
|
|
|
Msg: fmt.Sprintf("有 %d 个文件未能成功删除", len(failed)),
|
|
|
Error: err.Error(),
|
|
|
}
|
|
|
}
|
|
|
return serializer.Response{Code: 0}
|
|
|
}
|
|
|
|
|
|
// Thumb 通过签名URL获取从机文件缩略图
|
|
|
func (service *SlaveFileService) Thumb(ctx context.Context, c *gin.Context) serializer.Response {
|
|
|
// 创建文件系统
|
|
|
fs, err := filesystem.NewAnonymousFileSystem()
|
|
|
if err != nil {
|
|
|
return serializer.Err(serializer.CodePolicyNotAllowed, err.Error(), err)
|
|
|
}
|
|
|
defer fs.Recycle()
|
|
|
|
|
|
// 解码文件路径
|
|
|
fileSource, err := base64.RawURLEncoding.DecodeString(service.PathEncoded)
|
|
|
if err != nil {
|
|
|
return serializer.ParamErr("无法解析的文件地址", err)
|
|
|
}
|
|
|
fs.FileTarget = []model.File{{SourceName: string(fileSource), PicInfo: "1,1"}}
|
|
|
|
|
|
// 获取缩略图
|
|
|
resp, err := fs.GetThumb(ctx, 0)
|
|
|
if err != nil {
|
|
|
return serializer.Err(serializer.CodeNotSet, "无法获取缩略图", err)
|
|
|
}
|
|
|
|
|
|
defer resp.Content.Close()
|
|
|
http.ServeContent(c.Writer, c.Request, "thumb.png", time.Now(), resp.Content)
|
|
|
|
|
|
return serializer.Response{Code: 0}
|
|
|
}
|