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package explorer
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import (
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"context"
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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/fsctx"
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"github.com/HFO4/cloudreve/pkg/filesystem/local"
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"github.com/HFO4/cloudreve/pkg/serializer"
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"github.com/gin-gonic/gin"
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"net/http"
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"net/url"
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"path"
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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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// 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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// 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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// 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.OneTimeDownloadEnabled {
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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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// 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, "")
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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 *SingleFileService) 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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// 获取文件临时下载地址
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downloadURL, err := fs.GetDownloadURL(ctx, service.Path, "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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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 *SingleFileService) 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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// 获取下载地址
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downloadURL, err := fs.GetDownloadURL(ctx, service.Path, "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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// 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, "")
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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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// 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.OneTimeDownloadEnabled {
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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
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func (service *SingleFileService) PreviewContent(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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// 获取文件流
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rs, err := fs.GetDownloadContent(ctx, service.Path)
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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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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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// PutContent 更新文件内容
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func (service *SingleFileService) 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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Name: path.Base(service.Path),
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VirtualPath: path.Dir(service.Path),
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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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// 取得现有文件
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exist, originFile := fs.IsFileExist(service.Path)
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if !exist {
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return serializer.Err(404, "文件不存在", nil)
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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(ctx, fsctx.GinCtx, c)
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uploadCtx = context.WithValue(uploadCtx, fsctx.FileModelCtx, *originFile)
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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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