mirror of
https://github.com/mattermost/mattermost.git
synced 2025-02-25 18:55:24 -06:00
352 lines
9.2 KiB
Go
352 lines
9.2 KiB
Go
// Copyright (c) 2017-present Mattermost, Inc. All Rights Reserved.
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// See License.txt for license information.
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package api4
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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/mattermost/mattermost-server/app"
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"github.com/mattermost/mattermost-server/model"
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"github.com/mattermost/mattermost-server/utils"
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)
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const (
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FILE_TEAM_ID = "noteam"
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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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var MEDIA_CONTENT_TYPES = [...]string{
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"image/jpeg",
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"image/png",
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"image/bmp",
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"image/gif",
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"video/avi",
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"video/mpeg",
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"video/mp4",
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"audio/mpeg",
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"audio/wav",
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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.Files.Handle("", ApiSessionRequired(uploadFile)).Methods("POST")
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BaseRoutes.File.Handle("", ApiSessionRequiredTrustRequester(getFile)).Methods("GET")
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BaseRoutes.File.Handle("/thumbnail", ApiSessionRequiredTrustRequester(getFileThumbnail)).Methods("GET")
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BaseRoutes.File.Handle("/link", ApiSessionRequired(getFileLink)).Methods("GET")
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BaseRoutes.File.Handle("/preview", ApiSessionRequiredTrustRequester(getFilePreview)).Methods("GET")
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BaseRoutes.File.Handle("/info", ApiSessionRequired(getFileInfo)).Methods("GET")
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BaseRoutes.PublicFile.Handle("", ApiHandler(getPublicFile)).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.NewAppError("uploadFile", "api.file.upload_file.too_large.app_error", nil, "", 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("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("channel_id")
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return
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}
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if !c.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 := c.App.UploadFiles(FILE_TEAM_ID, 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.WriteHeader(http.StatusCreated)
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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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c.RequireFileId()
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if c.Err != nil {
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return
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}
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forceDownload, convErr := strconv.ParseBool(r.URL.Query().Get("download"))
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if convErr != nil {
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forceDownload = false
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}
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info, err := c.App.GetFileInfo(c.Params.FileId)
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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.CreatorId != c.Session.UserId && !c.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
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}
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data, err := utils.ReadFile(info.Path)
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if err != nil {
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c.Err = err
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c.Err.StatusCode = http.StatusNotFound
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return
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}
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err = writeFileResponse(info.Name, info.MimeType, data, forceDownload, w, r)
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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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}
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func getFileThumbnail(c *Context, w http.ResponseWriter, r *http.Request) {
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c.RequireFileId()
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if c.Err != nil {
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return
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}
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forceDownload, convErr := strconv.ParseBool(r.URL.Query().Get("download"))
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if convErr != nil {
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forceDownload = false
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}
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info, err := c.App.GetFileInfo(c.Params.FileId)
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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.CreatorId != c.Session.UserId && !c.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
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}
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if info.ThumbnailPath == "" {
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c.Err = model.NewAppError("getFileThumbnail", "api.file.get_file_thumbnail.no_thumbnail.app_error", nil, "file_id="+info.Id, 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, forceDownload, 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 getFileLink(c *Context, w http.ResponseWriter, r *http.Request) {
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c.RequireFileId()
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if c.Err != nil {
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return
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}
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if !utils.Cfg.FileSettings.EnablePublicLink {
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c.Err = model.NewAppError("getPublicLink", "api.file.get_public_link.disabled.app_error", nil, "", http.StatusNotImplemented)
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return
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}
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info, err := c.App.GetFileInfo(c.Params.FileId)
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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.CreatorId != c.Session.UserId && !c.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
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}
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if len(info.PostId) == 0 {
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c.Err = model.NewAppError("getPublicLink", "api.file.get_public_link.no_post.app_error", nil, "file_id="+info.Id, http.StatusBadRequest)
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return
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}
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resp := make(map[string]string)
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resp["link"] = app.GeneratePublicLink(c.GetSiteURLHeader(), info)
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w.Write([]byte(model.MapToJson(resp)))
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}
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func getFilePreview(c *Context, w http.ResponseWriter, r *http.Request) {
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c.RequireFileId()
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if c.Err != nil {
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return
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}
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forceDownload, convErr := strconv.ParseBool(r.URL.Query().Get("download"))
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if convErr != nil {
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forceDownload = false
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}
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info, err := c.App.GetFileInfo(c.Params.FileId)
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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.CreatorId != c.Session.UserId && !c.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
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}
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if info.PreviewPath == "" {
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c.Err = model.NewAppError("getFilePreview", "api.file.get_file_preview.no_preview.app_error", nil, "file_id="+info.Id, 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, forceDownload, 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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c.RequireFileId()
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if c.Err != nil {
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return
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}
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info, err := c.App.GetFileInfo(c.Params.FileId)
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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.CreatorId != c.Session.UserId && !c.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
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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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c.RequireFileId()
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if c.Err != nil {
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return
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}
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if !utils.Cfg.FileSettings.EnablePublicLink {
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c.Err = model.NewAppError("getPublicFile", "api.file.get_public_link.disabled.app_error", nil, "", http.StatusNotImplemented)
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return
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}
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info, err := c.App.GetFileInfo(c.Params.FileId)
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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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c.Err = model.NewAppError("getPublicFile", "api.file.get_file.public_invalid.app_error", nil, "", http.StatusBadRequest)
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return
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}
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if hash != app.GeneratePublicLinkHash(info.Id, *utils.Cfg.FileSettings.PublicLinkSalt) {
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c.Err = model.NewAppError("getPublicFile", "api.file.get_file.public_invalid.app_error", nil, "", 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, true, 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, forceDownload bool, 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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var toDownload bool
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if forceDownload {
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toDownload = true
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} else {
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isMediaType := false
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for _, mediaContentType := range MEDIA_CONTENT_TYPES {
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if strings.HasPrefix(contentType, mediaContentType) {
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isMediaType = true
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break
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}
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}
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toDownload = !isMediaType
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}
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if toDownload {
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w.Header().Set("Content-Disposition", "attachment;filename=\""+filename+"\"; filename*=UTF-8''"+url.QueryEscape(filename))
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} else {
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w.Header().Set("Content-Disposition", "inline;filename=\""+filename+"\"; filename*=UTF-8''"+url.QueryEscape(filename))
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}
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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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