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upload.go
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upload.go
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// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.
package api4
import (
"encoding/json"
"errors"
"io"
"mime/multipart"
"net/http"
"github.com/mattermost/mattermost-server/v6/audit"
"github.com/mattermost/mattermost-server/v6/model"
"github.com/mattermost/mattermost-server/v6/shared/mlog"
)
func (api *API) InitUpload() {
api.BaseRoutes.Uploads.Handle("", api.APISessionRequired(createUpload)).Methods("POST")
api.BaseRoutes.Upload.Handle("", api.APISessionRequired(getUpload)).Methods("GET")
api.BaseRoutes.Upload.Handle("", api.APISessionRequired(uploadData)).Methods("POST")
}
func createUpload(c *Context, w http.ResponseWriter, r *http.Request) {
if !*c.App.Config().FileSettings.EnableFileAttachments {
c.Err = model.NewAppError("createUpload",
"api.file.attachments.disabled.app_error",
nil, "", http.StatusNotImplemented)
return
}
var us model.UploadSession
if jsonErr := json.NewDecoder(r.Body).Decode(&us); jsonErr != nil {
c.SetInvalidParam("upload")
return
}
// these are not supported for client uploads; shared channels only.
us.RemoteId = ""
us.ReqFileId = ""
auditRec := c.MakeAuditRecord("createUpload", audit.Fail)
defer c.LogAuditRec(auditRec)
auditRec.AddMeta("upload", us)
if us.Type == model.UploadTypeImport {
if !c.IsSystemAdmin() {
c.SetPermissionError(model.PermissionManageSystem)
return
}
} else {
if !c.App.SessionHasPermissionToChannel(*c.AppContext.Session(), us.ChannelId, model.PermissionUploadFile) {
c.SetPermissionError(model.PermissionUploadFile)
return
}
us.Type = model.UploadTypeAttachment
}
us.Id = model.NewId()
if c.AppContext.Session().UserId != "" {
us.UserId = c.AppContext.Session().UserId
}
rus, err := c.App.CreateUploadSession(&us)
if err != nil {
c.Err = err
return
}
auditRec.Success()
w.WriteHeader(http.StatusCreated)
if err := json.NewEncoder(w).Encode(rus); err != nil {
mlog.Warn("Error while writing response", mlog.Err(err))
}
}
func getUpload(c *Context, w http.ResponseWriter, r *http.Request) {
c.RequireUploadId()
if c.Err != nil {
return
}
us, err := c.App.GetUploadSession(c.Params.UploadId)
if err != nil {
c.Err = err
return
}
if us.UserId != c.AppContext.Session().UserId && !c.IsSystemAdmin() {
c.Err = model.NewAppError("getUpload", "api.upload.get_upload.forbidden.app_error", nil, "", http.StatusForbidden)
return
}
if err := json.NewEncoder(w).Encode(us); err != nil {
mlog.Warn("Error while writing response", mlog.Err(err))
}
}
func uploadData(c *Context, w http.ResponseWriter, r *http.Request) {
if !*c.App.Config().FileSettings.EnableFileAttachments {
c.Err = model.NewAppError("uploadData", "api.file.attachments.disabled.app_error",
nil, "", http.StatusNotImplemented)
return
}
c.RequireUploadId()
if c.Err != nil {
return
}
auditRec := c.MakeAuditRecord("uploadData", audit.Fail)
defer c.LogAuditRec(auditRec)
auditRec.AddMeta("upload_id", c.Params.UploadId)
us, err := c.App.GetUploadSession(c.Params.UploadId)
if err != nil {
c.Err = err
return
}
if us.Type == model.UploadTypeImport {
if !c.IsSystemAdmin() {
c.SetPermissionError(model.PermissionManageSystem)
return
}
} else {
if us.UserId != c.AppContext.Session().UserId || !c.App.SessionHasPermissionToChannel(*c.AppContext.Session(), us.ChannelId, model.PermissionUploadFile) {
c.SetPermissionError(model.PermissionUploadFile)
return
}
}
info, err := doUploadData(c, us, r)
if err != nil {
c.Err = err
return
}
auditRec.Success()
if info == nil {
w.WriteHeader(http.StatusNoContent)
return
}
if err := json.NewEncoder(w).Encode(info); err != nil {
mlog.Warn("Error while writing response", mlog.Err(err))
}
}
func doUploadData(c *Context, us *model.UploadSession, r *http.Request) (*model.FileInfo, *model.AppError) {
boundary, parseErr := parseMultipartRequestHeader(r)
if parseErr != nil && !errors.Is(parseErr, http.ErrNotMultipart) {
return nil, model.NewAppError("uploadData", "api.upload.upload_data.invalid_content_type",
nil, parseErr.Error(), http.StatusBadRequest)
}
var rd io.Reader
if boundary != "" {
mr := multipart.NewReader(r.Body, boundary)
p, partErr := mr.NextPart()
if partErr != nil {
return nil, model.NewAppError("uploadData", "api.upload.upload_data.multipart_error",
nil, partErr.Error(), http.StatusBadRequest)
}
rd = p
} else {
if r.ContentLength > (us.FileSize - us.FileOffset) {
return nil, model.NewAppError("uploadData", "api.upload.upload_data.invalid_content_length",
nil, "", http.StatusBadRequest)
}
rd = r.Body
}
return c.App.UploadData(c.AppContext, us, rd)
}