gotosocial/vendor/github.com/minio/minio-go/v7/api-putobject-snowball.go
Dominik Süß 9d0df426da
[feature] S3 support (#674)
* feat: vendor minio client

* feat: introduce storage package with s3 support

* feat: serve s3 files directly

this saves a lot of bandwith as the files are fetched from the object
store directly

* fix: use explicit local storage in tests

* feat: integrate s3 storage with the main server

* fix: add s3 config to cli tests

* docs: explicitly set values in example config

also adds license header to the storage package

* fix: use better http status code on s3 redirect

HTTP 302 Found is the best fit, as it signifies that the resource
requested was found but not under its presumed URL

307/TemporaryRedirect would mean that this resource is usually located
here, not in this case

303/SeeOther indicates that the redirection does not link to the
requested resource but to another page

* refactor: use context in storage driver interface
2022-07-03 12:08:30 +02:00

215 lines
5.1 KiB
Go

/*
* MinIO Go Library for Amazon S3 Compatible Cloud Storage
* Copyright 2021 MinIO, Inc.
*
* 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 minio
import (
"archive/tar"
"bufio"
"bytes"
"context"
"fmt"
"io"
"io/ioutil"
"os"
"strings"
"sync"
"time"
"github.com/klauspost/compress/s2"
)
// SnowballOptions contains options for PutObjectsSnowball calls.
type SnowballOptions struct {
// Opts is options applied to all objects.
Opts PutObjectOptions
// Processing options:
// InMemory specifies that all objects should be collected in memory
// before they are uploaded.
// If false a temporary file will be created.
InMemory bool
// Compress enabled content compression before upload.
// Compression will typically reduce memory and network usage,
// Compression can safely be enabled with MinIO hosts.
Compress bool
}
// SnowballObject contains information about a single object to be added to the snowball.
type SnowballObject struct {
// Key is the destination key, including prefix.
Key string
// Size is the content size of this object.
Size int64
// Modtime to apply to the object.
ModTime time.Time
// Content of the object.
// Exactly 'Size' number of bytes must be provided.
Content io.Reader
// Close will be called when an object has finished processing.
// Note that if PutObjectsSnowball returns because of an error,
// objects not consumed from the input will NOT have been closed.
// Leave as nil for no callback.
Close func()
}
type nopReadSeekCloser struct {
io.ReadSeeker
}
func (n nopReadSeekCloser) Close() error {
return nil
}
// This is available as io.ReadSeekCloser from go1.16
type readSeekCloser interface {
io.Reader
io.Closer
io.Seeker
}
// PutObjectsSnowball will put multiple objects with a single put call.
// A (compressed) TAR file will be created which will contain multiple objects.
// The key for each object will be used for the destination in the specified bucket.
// Total size should be < 5TB.
// This function blocks until 'objs' is closed and the content has been uploaded.
func (c Client) PutObjectsSnowball(ctx context.Context, bucketName string, opts SnowballOptions, objs <-chan SnowballObject) (err error) {
err = opts.Opts.validate()
if err != nil {
return err
}
var tmpWriter io.Writer
var getTmpReader func() (rc readSeekCloser, sz int64, err error)
if opts.InMemory {
b := bytes.NewBuffer(nil)
tmpWriter = b
getTmpReader = func() (readSeekCloser, int64, error) {
return nopReadSeekCloser{bytes.NewReader(b.Bytes())}, int64(b.Len()), nil
}
} else {
f, err := ioutil.TempFile("", "s3-putsnowballobjects-*")
if err != nil {
return err
}
name := f.Name()
tmpWriter = f
var once sync.Once
defer once.Do(func() {
f.Close()
})
defer os.Remove(name)
getTmpReader = func() (readSeekCloser, int64, error) {
once.Do(func() {
f.Close()
})
f, err := os.Open(name)
if err != nil {
return nil, 0, err
}
st, err := f.Stat()
if err != nil {
return nil, 0, err
}
return f, st.Size(), nil
}
}
flush := func() error { return nil }
if !opts.Compress {
if !opts.InMemory {
// Insert buffer for writes.
buf := bufio.NewWriterSize(tmpWriter, 1<<20)
flush = buf.Flush
tmpWriter = buf
}
} else {
s2c := s2.NewWriter(tmpWriter, s2.WriterBetterCompression())
flush = s2c.Close
defer s2c.Close()
tmpWriter = s2c
}
t := tar.NewWriter(tmpWriter)
objectLoop:
for {
select {
case <-ctx.Done():
return ctx.Err()
case obj, ok := <-objs:
if !ok {
break objectLoop
}
closeObj := func() {}
if obj.Close != nil {
closeObj = obj.Close
}
// Trim accidental slash prefix.
obj.Key = strings.TrimPrefix(obj.Key, "/")
header := tar.Header{
Typeflag: tar.TypeReg,
Name: obj.Key,
Size: obj.Size,
ModTime: obj.ModTime,
Format: tar.FormatPAX,
}
if err := t.WriteHeader(&header); err != nil {
closeObj()
return err
}
n, err := io.Copy(t, obj.Content)
if err != nil {
closeObj()
return err
}
if n != obj.Size {
closeObj()
return io.ErrUnexpectedEOF
}
closeObj()
}
}
// Flush tar
err = t.Flush()
if err != nil {
return err
}
// Flush compression
err = flush()
if err != nil {
return err
}
if opts.Opts.UserMetadata == nil {
opts.Opts.UserMetadata = map[string]string{}
}
opts.Opts.UserMetadata["X-Amz-Meta-Snowball-Auto-Extract"] = "true"
opts.Opts.DisableMultipart = true
rc, sz, err := getTmpReader()
if err != nil {
return err
}
defer rc.Close()
rand := c.random.Uint64()
_, err = c.PutObject(ctx, bucketName, fmt.Sprintf("snowball-upload-%x.tar", rand), rc, sz, opts.Opts)
return err
}