50fc6e1e9e
* Prepare file upload infrastructure for Data Retention. This commit prepares the file upload infrastructure for the data retention feature that is under construction. Changes are: * Move file management code to utils to allow access to it from jobs. * From now on, store all file uploads in a top level folder which is the date of the day on which they were uploaded. This commit is based on Harrison Healey's branch, but updated to work with the latest master. * Use NewAppError
347 строки
10 KiB
Go
347 строки
10 KiB
Go
// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
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// See License.txt for license information.
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package api
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import (
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"net/http"
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"net/url"
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"strconv"
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"strings"
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l4g "github.com/alecthomas/log4go"
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"github.com/gorilla/mux"
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"github.com/mattermost/platform/app"
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"github.com/mattermost/platform/model"
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"github.com/mattermost/platform/utils"
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)
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const (
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PREVIEW_IMAGE_TYPE = "image/jpeg"
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THUMBNAIL_IMAGE_TYPE = "image/jpeg"
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)
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var UNSAFE_CONTENT_TYPES = [...]string{
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"application/javascript",
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"application/ecmascript",
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"text/javascript",
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"text/ecmascript",
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"application/x-javascript",
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"text/html",
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}
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func InitFile() {
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l4g.Debug(utils.T("api.file.init.debug"))
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BaseRoutes.TeamFiles.Handle("/upload", ApiUserRequired(uploadFile)).Methods("POST")
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BaseRoutes.NeedFile.Handle("/get", ApiUserRequiredTrustRequester(getFile)).Methods("GET")
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BaseRoutes.NeedFile.Handle("/get_thumbnail", ApiUserRequiredTrustRequester(getFileThumbnail)).Methods("GET")
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BaseRoutes.NeedFile.Handle("/get_preview", ApiUserRequiredTrustRequester(getFilePreview)).Methods("GET")
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BaseRoutes.NeedFile.Handle("/get_info", ApiUserRequired(getFileInfo)).Methods("GET")
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BaseRoutes.NeedFile.Handle("/get_public_link", ApiUserRequired(getPublicLink)).Methods("GET")
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BaseRoutes.Public.Handle("/files/{file_id:[A-Za-z0-9]+}/get", ApiAppHandlerTrustRequesterIndependent(getPublicFile)).Methods("GET")
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BaseRoutes.Public.Handle("/files/get/{team_id:[A-Za-z0-9]+}/{channel_id:[A-Za-z0-9]+}/{user_id:[A-Za-z0-9]+}/{filename:(?:[A-Za-z0-9]+/)?.+(?:\\.[A-Za-z0-9]{3,})?}", ApiAppHandlerTrustRequesterIndependent(getPublicFileOld)).Methods("GET")
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}
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func uploadFile(c *Context, w http.ResponseWriter, r *http.Request) {
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if !*utils.Cfg.FileSettings.EnableFileAttachments {
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c.Err = model.NewAppError("uploadFile", "api.file.attachments.disabled.app_error", nil, "", http.StatusNotImplemented)
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return
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}
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if r.ContentLength > *utils.Cfg.FileSettings.MaxFileSize {
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c.Err = model.NewLocAppError("uploadFile", "api.file.upload_file.too_large.app_error", nil, "")
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c.Err.StatusCode = http.StatusRequestEntityTooLarge
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return
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}
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if err := r.ParseMultipartForm(*utils.Cfg.FileSettings.MaxFileSize); err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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m := r.MultipartForm
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props := m.Value
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if len(props["channel_id"]) == 0 {
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c.SetInvalidParam("uploadFile", "channel_id")
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return
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}
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channelId := props["channel_id"][0]
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if len(channelId) == 0 {
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c.SetInvalidParam("uploadFile", "channel_id")
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return
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}
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if !app.SessionHasPermissionToChannel(c.Session, channelId, model.PERMISSION_UPLOAD_FILE) {
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c.SetPermissionError(model.PERMISSION_UPLOAD_FILE)
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return
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}
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resStruct, err := app.UploadFiles(c.TeamId, channelId, c.Session.UserId, m.File["files"], m.Value["client_ids"])
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if err != nil {
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c.Err = err
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return
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}
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w.Write([]byte(resStruct.ToJson()))
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}
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func getFile(c *Context, w http.ResponseWriter, r *http.Request) {
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info, err := getFileInfoForRequest(c, r, true)
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if err != nil {
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c.Err = err
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return
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}
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if data, err := utils.ReadFile(info.Path); err != nil {
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c.Err = err
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c.Err.StatusCode = http.StatusNotFound
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} else if err := writeFileResponse(info.Name, info.MimeType, data, w, r); err != nil {
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c.Err = err
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return
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}
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}
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func getFileThumbnail(c *Context, w http.ResponseWriter, r *http.Request) {
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info, err := getFileInfoForRequest(c, r, true)
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if err != nil {
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c.Err = err
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return
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}
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if info.ThumbnailPath == "" {
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c.Err = model.NewLocAppError("getFileThumbnail", "api.file.get_file_thumbnail.no_thumbnail.app_error", nil, "file_id="+info.Id)
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c.Err.StatusCode = http.StatusBadRequest
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return
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}
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if data, err := utils.ReadFile(info.ThumbnailPath); err != nil {
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c.Err = err
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c.Err.StatusCode = http.StatusNotFound
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} else if err := writeFileResponse(info.Name, THUMBNAIL_IMAGE_TYPE, data, w, r); err != nil {
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c.Err = err
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return
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}
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}
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func getFilePreview(c *Context, w http.ResponseWriter, r *http.Request) {
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info, err := getFileInfoForRequest(c, r, true)
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if err != nil {
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c.Err = err
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return
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}
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if info.PreviewPath == "" {
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c.Err = model.NewLocAppError("getFilePreview", "api.file.get_file_preview.no_preview.app_error", nil, "file_id="+info.Id)
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c.Err.StatusCode = http.StatusBadRequest
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return
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}
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if data, err := utils.ReadFile(info.PreviewPath); err != nil {
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c.Err = err
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c.Err.StatusCode = http.StatusNotFound
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} else if err := writeFileResponse(info.Name, PREVIEW_IMAGE_TYPE, data, w, r); err != nil {
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c.Err = err
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return
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}
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}
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func getFileInfo(c *Context, w http.ResponseWriter, r *http.Request) {
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info, err := getFileInfoForRequest(c, r, true)
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if err != nil {
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c.Err = err
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return
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}
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w.Header().Set("Cache-Control", "max-age=2592000, public")
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w.Write([]byte(info.ToJson()))
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}
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func getPublicFile(c *Context, w http.ResponseWriter, r *http.Request) {
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if !utils.Cfg.FileSettings.EnablePublicLink {
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c.Err = model.NewLocAppError("getPublicFile", "api.file.get_file.public_disabled.app_error", nil, "")
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c.Err.StatusCode = http.StatusNotImplemented
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return
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}
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info, err := getFileInfoForRequest(c, r, false)
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if err != nil {
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c.Err = err
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return
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}
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hash := r.URL.Query().Get("h")
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if len(hash) > 0 {
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correctHash := app.GeneratePublicLinkHash(info.Id, *utils.Cfg.FileSettings.PublicLinkSalt)
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if hash != correctHash {
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c.Err = model.NewLocAppError("getPublicFile", "api.file.get_file.public_invalid.app_error", nil, "")
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c.Err.StatusCode = http.StatusBadRequest
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return
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}
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} else {
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c.Err = model.NewLocAppError("getPublicFile", "api.file.get_file.public_invalid.app_error", nil, "")
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c.Err.StatusCode = http.StatusBadRequest
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return
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}
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if data, err := utils.ReadFile(info.Path); err != nil {
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c.Err = err
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c.Err.StatusCode = http.StatusNotFound
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} else if err := writeFileResponse(info.Name, info.MimeType, data, w, r); err != nil {
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c.Err = err
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return
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}
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}
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func getFileInfoForRequest(c *Context, r *http.Request, requireFileVisible bool) (*model.FileInfo, *model.AppError) {
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if len(utils.Cfg.FileSettings.DriverName) == 0 {
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return nil, model.NewAppError("getFileInfoForRequest", "api.file.get_info_for_request.storage.app_error", nil, "", http.StatusNotImplemented)
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}
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params := mux.Vars(r)
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fileId := params["file_id"]
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if len(fileId) != 26 {
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return nil, NewInvalidParamError("getFileInfoForRequest", "file_id")
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}
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info, err := app.GetFileInfo(fileId)
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if err != nil {
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return nil, err
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}
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// only let users access files visible in a channel, unless they're the one who uploaded the file
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if info.CreatorId != c.Session.UserId {
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if len(info.PostId) == 0 {
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err := model.NewLocAppError("getFileInfoForRequest", "api.file.get_file_info_for_request.no_post.app_error", nil, "file_id="+fileId)
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err.StatusCode = http.StatusBadRequest
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return nil, err
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}
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if requireFileVisible {
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if !app.SessionHasPermissionToChannelByPost(c.Session, info.PostId, model.PERMISSION_READ_CHANNEL) {
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c.SetPermissionError(model.PERMISSION_READ_CHANNEL)
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return nil, c.Err
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}
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}
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}
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return info, nil
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}
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func getPublicFileOld(c *Context, w http.ResponseWriter, r *http.Request) {
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if len(utils.Cfg.FileSettings.DriverName) == 0 {
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c.Err = model.NewLocAppError("getPublicFile", "api.file.get_public_file_old.storage.app_error", nil, "")
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c.Err.StatusCode = http.StatusNotImplemented
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return
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} else if !utils.Cfg.FileSettings.EnablePublicLink {
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c.Err = model.NewLocAppError("getPublicFile", "api.file.get_file.public_disabled.app_error", nil, "")
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c.Err.StatusCode = http.StatusNotImplemented
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return
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}
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params := mux.Vars(r)
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teamId := params["team_id"]
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channelId := params["channel_id"]
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userId := params["user_id"]
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filename := params["filename"]
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hash := r.URL.Query().Get("h")
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if len(hash) > 0 {
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correctHash := app.GeneratePublicLinkHash(filename, *utils.Cfg.FileSettings.PublicLinkSalt)
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if hash != correctHash {
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c.Err = model.NewLocAppError("getPublicFile", "api.file.get_file.public_invalid.app_error", nil, "")
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c.Err.StatusCode = http.StatusBadRequest
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return
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}
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} else {
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c.Err = model.NewLocAppError("getPublicFile", "api.file.get_file.public_invalid.app_error", nil, "")
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c.Err.StatusCode = http.StatusBadRequest
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return
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}
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path := "teams/" + teamId + "/channels/" + channelId + "/users/" + userId + "/" + filename
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var info *model.FileInfo
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if result := <-app.Srv.Store.FileInfo().GetByPath(path); result.Err != nil {
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c.Err = result.Err
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return
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} else {
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info = result.Data.(*model.FileInfo)
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}
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if len(info.PostId) == 0 {
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c.Err = model.NewLocAppError("getPublicFileOld", "api.file.get_public_file_old.no_post.app_error", nil, "file_id="+info.Id)
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c.Err.StatusCode = http.StatusBadRequest
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return
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}
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if data, err := utils.ReadFile(info.Path); err != nil {
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c.Err = err
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c.Err.StatusCode = http.StatusNotFound
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} else if err := writeFileResponse(info.Name, info.MimeType, data, w, r); err != nil {
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c.Err = err
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return
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}
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}
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func writeFileResponse(filename string, contentType string, bytes []byte, w http.ResponseWriter, r *http.Request) *model.AppError {
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w.Header().Set("Cache-Control", "max-age=2592000, private")
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w.Header().Set("Content-Length", strconv.Itoa(len(bytes)))
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w.Header().Set("X-Content-Type-Options", "nosniff")
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if contentType == "" {
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contentType = "application/octet-stream"
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} else {
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for _, unsafeContentType := range UNSAFE_CONTENT_TYPES {
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if strings.HasPrefix(contentType, unsafeContentType) {
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contentType = "text/plain"
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break
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}
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}
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}
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w.Header().Set("Content-Type", contentType)
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w.Header().Set("Content-Disposition", "attachment;filename=\""+filename+"\"; filename*=UTF-8''"+url.QueryEscape(filename))
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// prevent file links from being embedded in iframes
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w.Header().Set("X-Frame-Options", "DENY")
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w.Header().Set("Content-Security-Policy", "Frame-ancestors 'none'")
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w.Write(bytes)
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return nil
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}
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func getPublicLink(c *Context, w http.ResponseWriter, r *http.Request) {
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if !utils.Cfg.FileSettings.EnablePublicLink {
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c.Err = model.NewLocAppError("getPublicLink", "api.file.get_public_link.disabled.app_error", nil, "")
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c.Err.StatusCode = http.StatusNotImplemented
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return
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}
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info, err := getFileInfoForRequest(c, r, true)
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if err != nil {
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c.Err = err
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return
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}
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if len(info.PostId) == 0 {
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c.Err = model.NewLocAppError("getPublicLink", "api.file.get_public_link.no_post.app_error", nil, "file_id="+info.Id)
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c.Err.StatusCode = http.StatusBadRequest
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return
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}
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w.Write([]byte(model.StringToJson(app.GeneratePublicLinkV3(c.GetSiteURLHeader(), info))))
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}
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