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293 lines
9.5 KiB
293 lines
9.5 KiB
package explorer
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import (
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"context"
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"fmt"
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model "github.com/cloudreve/Cloudreve/v3/models"
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"github.com/cloudreve/Cloudreve/v3/pkg/auth"
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"github.com/cloudreve/Cloudreve/v3/pkg/cache"
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"github.com/cloudreve/Cloudreve/v3/pkg/filesystem"
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"github.com/cloudreve/Cloudreve/v3/pkg/filesystem/driver/local"
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"github.com/cloudreve/Cloudreve/v3/pkg/filesystem/fsctx"
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"github.com/cloudreve/Cloudreve/v3/pkg/hashid"
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"github.com/cloudreve/Cloudreve/v3/pkg/serializer"
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"github.com/cloudreve/Cloudreve/v3/pkg/util"
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"github.com/gin-gonic/gin"
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"io/ioutil"
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"strconv"
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"strings"
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"time"
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)
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// CreateUploadSessionService 获取上传凭证服务
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type CreateUploadSessionService struct {
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Path string `json:"path" binding:"required"`
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Size uint64 `json:"size" binding:"min=0"`
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Name string `json:"name" binding:"required"`
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PolicyID string `json:"policy_id" binding:"required"`
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LastModified int64 `json:"last_modified"`
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MimeType string `json:"mime_type"`
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}
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// Create 创建新的上传会话
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func (service *CreateUploadSessionService) Create(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.CodeCreateFSError, "", err)
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}
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// 取得存储策略的ID
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rawID, err := hashid.DecodeHashID(service.PolicyID, hashid.PolicyID)
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if err != nil {
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return serializer.Err(serializer.CodePolicyNotExist, "", err)
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}
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if fs.Policy.ID != rawID {
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return serializer.Err(serializer.CodePolicyNotAllowed, "存储策略发生变化，请刷新文件列表并重新添加此任务", nil)
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}
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file := &fsctx.FileStream{
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Size: service.Size,
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Name: service.Name,
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VirtualPath: service.Path,
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File: ioutil.NopCloser(strings.NewReader("")),
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MimeType: service.MimeType,
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}
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if service.LastModified > 0 {
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lastModified := time.UnixMilli(service.LastModified)
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file.LastModified = &lastModified
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}
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credential, err := fs.CreateUploadSession(ctx, file)
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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: credential,
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}
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}
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// UploadService 本机及从机策略上传服务
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type UploadService struct {
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ID string `uri:"sessionId" binding:"required"`
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Index int `uri:"index" form:"index" binding:"min=0"`
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}
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// LocalUpload 处理本机文件分片上传
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func (service *UploadService) LocalUpload(ctx context.Context, c *gin.Context) serializer.Response {
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uploadSessionRaw, ok := cache.Get(filesystem.UploadSessionCachePrefix + service.ID)
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if !ok {
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return serializer.Err(serializer.CodeUploadSessionExpired, "", nil)
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}
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uploadSession := uploadSessionRaw.(serializer.UploadSession)
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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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if uploadSession.UID != fs.User.ID {
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return serializer.Err(serializer.CodeUploadSessionExpired, "", nil)
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}
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// 查找上传会话创建的占位文件
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file, err := model.GetFilesByUploadSession(service.ID, fs.User.ID)
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if err != nil {
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return serializer.Err(serializer.CodeUploadSessionExpired, "", err)
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}
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// 重设 fs 存储策略
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if !uploadSession.Policy.IsTransitUpload(uploadSession.Size) {
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return serializer.Err(serializer.CodePolicyNotAllowed, "", err)
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}
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fs.Policy = &uploadSession.Policy
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if err := fs.DispatchHandler(); err != nil {
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return serializer.Err(serializer.CodePolicyNotExist, "", err)
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}
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expectedSizeStart := file.Size
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actualSizeStart := uint64(service.Index) * uploadSession.Policy.OptionsSerialized.ChunkSize
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if uploadSession.Policy.OptionsSerialized.ChunkSize == 0 && service.Index > 0 {
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return serializer.Err(serializer.CodeInvalidChunkIndex, "Chunk index cannot be greater than 0", nil)
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}
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if expectedSizeStart < actualSizeStart {
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return serializer.Err(serializer.CodeInvalidChunkIndex, "Chunk must be uploaded in order", nil)
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}
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if expectedSizeStart > actualSizeStart {
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util.Log().Info("Trying to overwrite chunk[%d] Start=%d", service.Index, actualSizeStart)
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}
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return processChunkUpload(ctx, c, fs, &uploadSession, service.Index, file, fsctx.Append)
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}
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// SlaveUpload 处理从机文件分片上传
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func (service *UploadService) SlaveUpload(ctx context.Context, c *gin.Context) serializer.Response {
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uploadSessionRaw, ok := cache.Get(filesystem.UploadSessionCachePrefix + service.ID)
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if !ok {
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return serializer.Err(serializer.CodeUploadSessionExpired, "", nil)
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}
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uploadSession := uploadSessionRaw.(serializer.UploadSession)
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fs, err := filesystem.NewAnonymousFileSystem()
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if err != nil {
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return serializer.Err(serializer.CodeCreateFSError, "", err)
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}
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fs.Handler = local.Driver{}
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// 解析需要的参数
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service.Index, _ = strconv.Atoi(c.Query("chunk"))
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mode := fsctx.Append
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if c.GetHeader(auth.CrHeaderPrefix+"Overwrite") == "true" {
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mode |= fsctx.Overwrite
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}
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return processChunkUpload(ctx, c, fs, &uploadSession, service.Index, nil, mode)
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}
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func processChunkUpload(ctx context.Context, c *gin.Context, fs *filesystem.FileSystem, session *serializer.UploadSession, index int, file *model.File, mode fsctx.WriteMode) serializer.Response {
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// 取得并校验文件大小是否符合分片要求
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chunkSize := session.Policy.OptionsSerialized.ChunkSize
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isLastChunk := session.Policy.OptionsSerialized.ChunkSize == 0 || uint64(index+1)*chunkSize >= session.Size
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expectedLength := chunkSize
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if isLastChunk {
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expectedLength = session.Size - uint64(index)*chunkSize
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}
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fileSize, err := strconv.ParseUint(c.Request.Header.Get("Content-Length"), 10, 64)
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if err != nil || (expectedLength != fileSize) {
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return serializer.Err(
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serializer.CodeInvalidContentLength,
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fmt.Sprintf("Invalid Content-Length (expected: %d)", expectedLength),
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err,
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)
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}
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// 非首个分片时需要允许覆盖
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if index > 0 {
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mode |= fsctx.Overwrite
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}
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fileData := fsctx.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: session.Name,
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VirtualPath: session.VirtualPath,
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SavePath: session.SavePath,
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Mode: mode,
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AppendStart: chunkSize * uint64(index),
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Model: file,
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LastModified: session.LastModified,
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}
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// 给文件系统分配钩子
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fs.Use("AfterUploadCanceled", filesystem.HookTruncateFileTo(fileData.AppendStart))
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fs.Use("AfterValidateFailed", filesystem.HookTruncateFileTo(fileData.AppendStart))
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if file != nil {
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fs.Use("BeforeUpload", filesystem.HookValidateCapacity)
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fs.Use("AfterUpload", filesystem.HookChunkUploaded)
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fs.Use("AfterValidateFailed", filesystem.HookChunkUploadFailed)
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if isLastChunk {
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fs.Use("AfterUpload", filesystem.HookPopPlaceholderToFile(""))
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fs.Use("AfterUpload", filesystem.HookDeleteUploadSession(session.Key))
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}
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} else {
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if isLastChunk {
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fs.Use("AfterUpload", filesystem.SlaveAfterUpload(session))
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fs.Use("AfterUpload", filesystem.HookDeleteUploadSession(session.Key))
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}
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}
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// 执行上传
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uploadCtx := context.WithValue(ctx, fsctx.GinCtx, c)
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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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}
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// UploadSessionService 上传会话服务
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type UploadSessionService struct {
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ID string `uri:"sessionId" binding:"required"`
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}
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// Delete 删除指定上传会话
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func (service *UploadSessionService) 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.NewFileSystemFromContext(c)
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if err != nil {
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return serializer.Err(serializer.CodeCreateFSError, "", err)
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}
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defer fs.Recycle()
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// 查找需要删除的上传会话的占位文件
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file, err := model.GetFilesByUploadSession(service.ID, fs.User.ID)
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if err != nil {
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return serializer.Err(serializer.CodeUploadSessionExpired, "", err)
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}
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// 删除文件
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if err := fs.Delete(ctx, []uint{}, []uint{file.ID}, false, false); err != nil {
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return serializer.Err(serializer.CodeInternalSetting, "Failed to delete upload session", err)
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}
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return serializer.Response{}
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}
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// SlaveDelete 从机删除指定上传会话
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func (service *UploadSessionService) SlaveDelete(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.CodeCreateFSError, "", err)
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}
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defer fs.Recycle()
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session, ok := cache.Get(filesystem.UploadSessionCachePrefix + service.ID)
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if !ok {
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return serializer.Err(serializer.CodeUploadSessionExpired, "", nil)
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}
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if _, err := fs.Handler.Delete(ctx, []string{session.(serializer.UploadSession).SavePath}); err != nil {
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return serializer.Err(serializer.CodeInternalSetting, "Failed to delete temp file", err)
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}
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cache.Deletes([]string{service.ID}, filesystem.UploadSessionCachePrefix)
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return serializer.Response{}
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}
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// DeleteAllUploadSession 删除当前用户的全部上传绘会话
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func DeleteAllUploadSession(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.CodeCreateFSError, "", err)
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}
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defer fs.Recycle()
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// 查找需要删除的上传会话的占位文件
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files := model.GetUploadPlaceholderFiles(fs.User.ID)
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fileIDs := make([]uint, len(files))
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for i, file := range files {
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fileIDs[i] = file.ID
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}
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// 删除文件
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if err := fs.Delete(ctx, []uint{}, fileIDs, false, false); err != nil {
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return serializer.Err(serializer.CodeInternalSetting, "Failed to cleanup upload session", err)
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}
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return serializer.Response{}
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}
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