/
userfiles.go
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/
userfiles.go
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/*************************************************************************
* Copyright 2021 Gravwell, Inc. All rights reserved.
* Contact: <legal@gravwell.io>
*
* This software may be modified and distributed under the terms of the
* BSD 2-clause license. See the LICENSE file for details.
**************************************************************************/
package client
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"io"
"net/http"
"os"
"github.com/gravwell/gravwell/v3/client/types"
"github.com/google/uuid"
)
const (
maxFileSize int64 = 8 * 1024 * 1024
userFileField string = `file`
userFileNameField string = `name`
userFileDescField string = `desc`
userFileMetaField string = `meta`
userFileGuidField string = `guid`
)
var (
ErrInvalidUserFileSize = errors.New("UserFile is too large to upload")
)
// UserFiles lists all the user files the logged in account has access to
func (c *Client) UserFiles() (ufds []types.UserFileDetails, err error) {
err = c.getStaticURL(userFilesUrl(), &ufds)
return
}
// AllUserFiles pulls the complete list of all user files for the entire system.
// Non-administrators will receive the same list as returned by UserFiles.
func (c *Client) AllUserFiles() (ufds []types.UserFileDetails, err error) {
c.SetAdminMode()
if err = c.getStaticURL(userFilesUrl(), &ufds); err != nil {
ufds = nil
}
c.ClearAdminMode()
return
}
// AddUserFile creates a new user file with the specified name and description.
// pth should point to a valid file on the local system.
func (c *Client) AddUserFile(name, desc, pth string) (guid uuid.UUID, err error) {
var fin *os.File
if fin, err = os.Open(pth); err != nil {
return
}
meta := types.UserFileDetails{Name: name, Desc: desc}
if guid, err = c.uploadUserFile(http.MethodPost, userFilesUrl(), fin, meta); err != nil {
fin.Close()
return
}
err = fin.Close()
return
}
// AddUserFileDetails creates a new user file (uploaded from pth) with details set by the meta parameter.
func (c *Client) AddUserFileDetails(meta types.UserFileDetails, pth string) (guid uuid.UUID, err error) {
var fin *os.File
if fin, err = os.Open(pth); err != nil {
return
}
if guid, err = c.uploadUserFile(http.MethodPost, userFilesUrl(), fin, meta); err != nil {
fin.Close()
return
}
err = fin.Close()
return
}
// DeleteUserFile removes a user file by its GUID
func (c *Client) DeleteUserFile(id uuid.UUID) (err error) {
err = c.deleteStaticURL(userFilesIdUrl(id), nil)
return
}
// UpdateUserFile will push a new user file with name and description to the given GUID
func (c *Client) UpdateUserFile(id uuid.UUID, pth string) (err error) {
var fin *os.File
if fin, err = os.Open(pth); err != nil {
return
}
// doesn't really matter, it is not used
meta := types.UserFileDetails{}
if _, err = c.uploadUserFile(http.MethodPut, userFilesIdUrl(id), fin, meta); err != nil {
fin.Close()
return
}
err = fin.Close()
return
}
// UpdateUserFileMetadata will change every field of the user file
// but not the actual contents of the file
func (c *Client) UpdateUserFileMetadata(id uuid.UUID, uf types.UserFileDetails) (err error) {
return c.patchStaticURL(userFilesIdUrl(id), uf)
}
// GetUserFile downloads a file with the given GUID and hands back its contents
func (c *Client) GetUserFile(id uuid.UUID) (bts []byte, err error) {
bb := bytes.NewBuffer(nil)
var resp *http.Response
if resp, err = c.methodRequestURL(http.MethodGet, userFilesIdUrl(id), ``, nil); err != nil {
return
}
// Make sure the reply was ok
if resp.StatusCode != 200 {
err = fmt.Errorf("Invalid response code %d", resp.StatusCode)
return
}
if _, err = io.CopyN(bb, resp.Body, maxFileSize); err != nil && err != io.EOF {
resp.Body.Close()
return
}
if err = resp.Body.Close(); err == nil {
bts = bb.Bytes()
}
return
}
// GetUserFileDetails fetches info about a particular file by GUID or ThingUUID.
func (c *Client) GetUserFileDetails(id uuid.UUID) (dets types.UserFileDetails, err error) {
err = c.getStaticURL(userFilesIdDetailsUrl(id), &dets)
return
}
// uploadUserFile does the dirty work of firing off a file upload
func (c *Client) uploadUserFile(method, url string, fin *os.File, meta types.UserFileDetails) (guid uuid.UUID, err error) {
var resp *http.Response
var fi os.FileInfo
if fi, err = fin.Stat(); err != nil {
return
} else if fi.Size() > maxFileSize {
err = ErrInvalidUserFileSize
return
}
// generate the meta field
var metaString []byte
if metaString, err = json.Marshal(meta); err != nil {
return
}
fields := map[string]string{
userFileMetaField: string(metaString),
}
var ufr types.UserFileDetails
if resp, err = c.uploadMultipartFileMethod(method, url, userFileField, `file`, fin, fields); err != nil {
return
}
defer drainResponse(resp)
if resp.StatusCode != 200 {
err = fmt.Errorf("Invalid response code %d", resp.StatusCode)
} else if err = json.NewDecoder(resp.Body).Decode(&ufr); err != nil {
return
} else if ufr.GUID == uuid.Nil {
err = fmt.Errorf("Invalid response GUID")
}
guid = ufr.GUID
return
}