/usr/share/gocode/src/github.com/ctdk/goiardi/filestore/filestore.go is in golang-github-ctdk-goiardi-dev 0.11.7-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* not send them to s3 or somesuch. A building block of sandbox and cookbook
* functionality. */
/*
* Copyright (c) 2013-2017, Jeremy Bingham (<jeremy@goiardi.gl>)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// Package filestore provides local file uploads and downloads for cookbook
// uploading and downloading. All access to the files is through the checksum,
// rather than the file name.
//
// If config.Config.LocalFstoreDir is != "", the content of the files will be
// stored in that directory.
package filestore
import (
"bytes"
"crypto/md5"
"database/sql"
"fmt"
"io"
"os"
"path"
"github.com/ctdk/goiardi/config"
"github.com/ctdk/goiardi/datastore"
"github.com/tideland/golib/logger"
)
/* Local filestorage struct. Add fields as needed. */
// FileStore is an individual file in the filestore. Note that there is no
// actual name for the file used, but it is identified by the file's checksum.
// The file's data is stored as a pointer to an array of bytes.
type FileStore struct {
Chksum string
Data *[]byte
}
/* New, for this, includes giving it the file data */
// New creates a new filestore item with the given checksum, io.ReadCloser
// holding the file's data, and the length of the file. If the file data's
// checksum does not match the provided checksum an error will be trhown.
func New(chksum string, data io.ReadCloser, dataLength int64) (*FileStore, error) {
f, err := Get(chksum)
if err == nil {
// if err is nil, wait until checking the uploaded content to
// see if it's the same as what we have already
err = fmt.Errorf("File with checksum %s already exists.", chksum)
}
/* Read the data in */
fileData := make([]byte, dataLength)
if n, err := io.ReadFull(data, fileData); err != nil {
/* Something went wrong reading the data! */
readErr := fmt.Errorf("Only read %d bytes (out of %d, supposedly) from io.ReadCloser: %s", n, dataLength, err.Error())
return nil, readErr
}
if f != nil {
if !bytes.Equal(fileData, *f.Data) {
return nil, err
}
}
/* Verify checksum. May move to a different function later. */
verChk := md5.New()
/* try writestring first */
verChk.Write(fileData)
verChksum := fmt.Sprintf("%x", verChk.Sum(nil))
if verChksum != chksum {
chkErr := fmt.Errorf("Checksum %s did not match original %s!", verChksum, chksum)
return nil, chkErr
}
filestore := &FileStore{
Chksum: chksum,
Data: &fileData,
}
return filestore, nil
}
// Get the file with this checksum.
func Get(chksum string) (*FileStore, error) {
var filestore *FileStore
var found bool
if config.UsingDB() {
var err error
filestore, err = getSQL(chksum)
if err != nil {
if err == sql.ErrNoRows {
found = false
} else {
return nil, err
}
} else {
found = true
}
} else {
ds := datastore.New()
var f interface{}
f, found = ds.Get("filestore", chksum)
if f != nil {
filestore = f.(*FileStore)
}
}
if !found {
err := fmt.Errorf("File with checksum %s not found", chksum)
return nil, err
}
if config.Config.LocalFstoreDir != "" {
if err := filestore.loadData(); err != nil {
return nil, err
}
}
if filestore.Data == nil {
d := make([]byte, 0)
filestore.Data = &d
}
return filestore, nil
}
func (f *FileStore) loadData() error {
/* If this is called, file data is stored on disk */
chkPath := path.Join(config.Config.LocalFstoreDir, f.Chksum)
fp, err := os.Open(chkPath)
if err != nil {
return err
}
defer fp.Close()
stat, sterr := fp.Stat()
if sterr != nil {
return sterr
}
fdata := make([]byte, stat.Size())
n, fperr := fp.Read(fdata)
if fperr != nil {
return fperr
} else if int64(n) != stat.Size() {
err = fmt.Errorf("only %d bytes were read from the expected %d", n, stat.Size())
return err
}
f.Data = &fdata
return nil
}
// Save a file store item.
func (f *FileStore) Save() error {
if config.Config.UseMySQL {
err := f.saveMySQL()
if err != nil {
return err
}
} else if config.Config.UsePostgreSQL {
err := f.savePostgreSQL()
if err != nil {
return nil
}
} else {
ds := datastore.New()
ds.Set("filestore", f.Chksum, f)
}
if config.Config.LocalFstoreDir != "" {
fp, err := os.Create(path.Join(config.Config.LocalFstoreDir, f.Chksum))
if err != nil {
return err
}
defer fp.Close()
_, err = fp.Write(*f.Data)
if err != nil {
return err
}
return fp.Close()
}
return nil
}
// Delete a file store item.
func (f *FileStore) Delete() error {
if config.UsingDB() {
err := f.deleteSQL()
if err != nil {
return err
}
} else {
ds := datastore.New()
ds.Delete("filestore", f.Chksum)
}
if config.Config.LocalFstoreDir != "" {
err := os.Remove(path.Join(config.Config.LocalFstoreDir, f.Chksum))
if err != nil {
return err
}
}
return nil
}
// GetList gets a list of files that have been uploaded.
func GetList() []string {
var fileList []string
if config.UsingDB() {
fileList = getListSQL()
} else {
ds := datastore.New()
fileList = ds.GetList("filestore")
}
return fileList
}
// DeleteHashes deletes all the checksum hashes given from the filestore.
func DeleteHashes(fileHashes []string) {
if config.Config.UseMySQL {
deleteHashesMySQL(fileHashes)
} else if config.Config.UsePostgreSQL {
deleteHashesPostgreSQL(fileHashes)
} else {
for _, ff := range fileHashes {
delFile, err := Get(ff)
if err != nil {
logger.Debugf("Strange, we got an error trying to get %s to delete it.\n", ff)
logger.Debugf(err.Error())
} else {
_ = delFile.Delete()
}
// May be able to remove this. Check that it actually deleted
d, _ := Get(ff)
if d != nil {
logger.Debugf("Stranger and stranger, %s is still in the file store.\n", ff)
}
}
}
if config.Config.LocalFstoreDir != "" {
for _, fh := range fileHashes {
err := os.Remove(path.Join(config.Config.LocalFstoreDir, fh))
if err != nil {
logger.Errorf(err.Error())
}
}
}
}
// AllFilestores returns all file checksums and their contents, for exporting.
func AllFilestores() []*FileStore {
var filestores []*FileStore
if config.UsingDB() {
filestores = allFilestoresSQL()
} else {
fileList := GetList()
for _, f := range fileList {
fl, err := Get(f)
if err != nil {
logger.Debugf("File checksum %s was in the list of files, but wasn't found when fetched. Continuing.", f)
continue
}
filestores = append(filestores, fl)
}
}
return filestores
}
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