mirror of
https://github.com/octoleo/restic.git
synced 2024-12-26 04:17:29 +00:00
437 lines
14 KiB
Go
437 lines
14 KiB
Go
/*
|
|
* Minio Go Library for Amazon S3 Compatible Cloud Storage (C) 2017 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 (
|
|
"fmt"
|
|
"io"
|
|
"net/http"
|
|
"sort"
|
|
"strings"
|
|
|
|
"github.com/minio/minio-go/pkg/s3utils"
|
|
)
|
|
|
|
// PutObjectStreaming using AWS streaming signature V4
|
|
func (c Client) PutObjectStreaming(bucketName, objectName string, reader io.Reader) (n int64, err error) {
|
|
return c.PutObjectWithProgress(bucketName, objectName, reader, nil, nil)
|
|
}
|
|
|
|
// putObjectMultipartStream - upload a large object using
|
|
// multipart upload and streaming signature for signing payload.
|
|
// Comprehensive put object operation involving multipart uploads.
|
|
//
|
|
// Following code handles these types of readers.
|
|
//
|
|
// - *os.File
|
|
// - *minio.Object
|
|
// - Any reader which has a method 'ReadAt()'
|
|
//
|
|
func (c Client) putObjectMultipartStream(bucketName, objectName string,
|
|
reader io.Reader, size int64, metadata map[string][]string, progress io.Reader) (n int64, err error) {
|
|
|
|
// Verify if reader is *minio.Object, *os.File or io.ReaderAt.
|
|
// NOTE: Verification of object is kept for a specific purpose
|
|
// while it is going to be duck typed similar to io.ReaderAt.
|
|
// It is to indicate that *minio.Object implements io.ReaderAt.
|
|
// and such a functionality is used in the subsequent code path.
|
|
if isFile(reader) || !isObject(reader) && isReadAt(reader) {
|
|
n, err = c.putObjectMultipartStreamFromReadAt(bucketName, objectName, reader.(io.ReaderAt), size, metadata, progress)
|
|
} else {
|
|
n, err = c.putObjectMultipartStreamNoChecksum(bucketName, objectName, reader, size, metadata, progress)
|
|
}
|
|
if err != nil {
|
|
errResp := ToErrorResponse(err)
|
|
// Verify if multipart functionality is not available, if not
|
|
// fall back to single PutObject operation.
|
|
if errResp.Code == "AccessDenied" && strings.Contains(errResp.Message, "Access Denied") {
|
|
// Verify if size of reader is greater than '5GiB'.
|
|
if size > maxSinglePutObjectSize {
|
|
return 0, ErrEntityTooLarge(size, maxSinglePutObjectSize, bucketName, objectName)
|
|
}
|
|
// Fall back to uploading as single PutObject operation.
|
|
return c.putObjectNoChecksum(bucketName, objectName, reader, size, metadata, progress)
|
|
}
|
|
}
|
|
return n, err
|
|
}
|
|
|
|
// uploadedPartRes - the response received from a part upload.
|
|
type uploadedPartRes struct {
|
|
Error error // Any error encountered while uploading the part.
|
|
PartNum int // Number of the part uploaded.
|
|
Size int64 // Size of the part uploaded.
|
|
Part *ObjectPart
|
|
}
|
|
|
|
type uploadPartReq struct {
|
|
PartNum int // Number of the part uploaded.
|
|
Part *ObjectPart // Size of the part uploaded.
|
|
}
|
|
|
|
// putObjectMultipartFromReadAt - Uploads files bigger than 64MiB.
|
|
// Supports all readers which implements io.ReaderAt interface
|
|
// (ReadAt method).
|
|
//
|
|
// NOTE: This function is meant to be used for all readers which
|
|
// implement io.ReaderAt which allows us for resuming multipart
|
|
// uploads but reading at an offset, which would avoid re-read the
|
|
// data which was already uploaded. Internally this function uses
|
|
// temporary files for staging all the data, these temporary files are
|
|
// cleaned automatically when the caller i.e http client closes the
|
|
// stream after uploading all the contents successfully.
|
|
func (c Client) putObjectMultipartStreamFromReadAt(bucketName, objectName string,
|
|
reader io.ReaderAt, size int64, metadata map[string][]string, progress io.Reader) (n int64, err error) {
|
|
// Input validation.
|
|
if err = s3utils.CheckValidBucketName(bucketName); err != nil {
|
|
return 0, err
|
|
}
|
|
if err = s3utils.CheckValidObjectName(objectName); err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
// Calculate the optimal parts info for a given size.
|
|
totalPartsCount, partSize, lastPartSize, err := optimalPartInfo(size)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
// Initiate a new multipart upload.
|
|
uploadID, err := c.newUploadID(bucketName, objectName, metadata)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
// Aborts the multipart upload in progress, if the
|
|
// function returns any error, since we do not resume
|
|
// we should purge the parts which have been uploaded
|
|
// to relinquish storage space.
|
|
defer func() {
|
|
if err != nil {
|
|
c.abortMultipartUpload(bucketName, objectName, uploadID)
|
|
}
|
|
}()
|
|
|
|
// Total data read and written to server. should be equal to 'size' at the end of the call.
|
|
var totalUploadedSize int64
|
|
|
|
// Complete multipart upload.
|
|
var complMultipartUpload completeMultipartUpload
|
|
|
|
// Declare a channel that sends the next part number to be uploaded.
|
|
// Buffered to 10000 because thats the maximum number of parts allowed
|
|
// by S3.
|
|
uploadPartsCh := make(chan uploadPartReq, 10000)
|
|
|
|
// Declare a channel that sends back the response of a part upload.
|
|
// Buffered to 10000 because thats the maximum number of parts allowed
|
|
// by S3.
|
|
uploadedPartsCh := make(chan uploadedPartRes, 10000)
|
|
|
|
// Used for readability, lastPartNumber is always totalPartsCount.
|
|
lastPartNumber := totalPartsCount
|
|
|
|
// Send each part number to the channel to be processed.
|
|
for p := 1; p <= totalPartsCount; p++ {
|
|
uploadPartsCh <- uploadPartReq{PartNum: p, Part: nil}
|
|
}
|
|
close(uploadPartsCh)
|
|
|
|
// Receive each part number from the channel allowing three parallel uploads.
|
|
for w := 1; w <= totalWorkers; w++ {
|
|
go func() {
|
|
// Each worker will draw from the part channel and upload in parallel.
|
|
for uploadReq := range uploadPartsCh {
|
|
|
|
// If partNumber was not uploaded we calculate the missing
|
|
// part offset and size. For all other part numbers we
|
|
// calculate offset based on multiples of partSize.
|
|
readOffset := int64(uploadReq.PartNum-1) * partSize
|
|
|
|
// As a special case if partNumber is lastPartNumber, we
|
|
// calculate the offset based on the last part size.
|
|
if uploadReq.PartNum == lastPartNumber {
|
|
readOffset = (size - lastPartSize)
|
|
partSize = lastPartSize
|
|
}
|
|
|
|
// Get a section reader on a particular offset.
|
|
sectionReader := newHook(io.NewSectionReader(reader, readOffset, partSize), progress)
|
|
|
|
// Proceed to upload the part.
|
|
var objPart ObjectPart
|
|
objPart, err = c.uploadPart(bucketName, objectName, uploadID,
|
|
sectionReader, uploadReq.PartNum,
|
|
nil, nil, partSize, metadata)
|
|
if err != nil {
|
|
uploadedPartsCh <- uploadedPartRes{
|
|
Size: 0,
|
|
Error: err,
|
|
}
|
|
// Exit the goroutine.
|
|
return
|
|
}
|
|
|
|
// Save successfully uploaded part metadata.
|
|
uploadReq.Part = &objPart
|
|
|
|
// Send successful part info through the channel.
|
|
uploadedPartsCh <- uploadedPartRes{
|
|
Size: objPart.Size,
|
|
PartNum: uploadReq.PartNum,
|
|
Part: uploadReq.Part,
|
|
Error: nil,
|
|
}
|
|
}
|
|
}()
|
|
}
|
|
|
|
// Gather the responses as they occur and update any
|
|
// progress bar.
|
|
for u := 1; u <= totalPartsCount; u++ {
|
|
uploadRes := <-uploadedPartsCh
|
|
if uploadRes.Error != nil {
|
|
return totalUploadedSize, uploadRes.Error
|
|
}
|
|
// Retrieve each uploaded part and store it to be completed.
|
|
// part, ok := partsInfo[uploadRes.PartNum]
|
|
part := uploadRes.Part
|
|
if part == nil {
|
|
return 0, ErrInvalidArgument(fmt.Sprintf("Missing part number %d", uploadRes.PartNum))
|
|
}
|
|
// Update the totalUploadedSize.
|
|
totalUploadedSize += uploadRes.Size
|
|
// Store the parts to be completed in order.
|
|
complMultipartUpload.Parts = append(complMultipartUpload.Parts, CompletePart{
|
|
ETag: part.ETag,
|
|
PartNumber: part.PartNumber,
|
|
})
|
|
}
|
|
|
|
// Verify if we uploaded all the data.
|
|
if totalUploadedSize != size {
|
|
return totalUploadedSize, ErrUnexpectedEOF(totalUploadedSize, size, bucketName, objectName)
|
|
}
|
|
|
|
// Sort all completed parts.
|
|
sort.Sort(completedParts(complMultipartUpload.Parts))
|
|
_, err = c.completeMultipartUpload(bucketName, objectName, uploadID, complMultipartUpload)
|
|
if err != nil {
|
|
return totalUploadedSize, err
|
|
}
|
|
|
|
// Return final size.
|
|
return totalUploadedSize, nil
|
|
}
|
|
|
|
func (c Client) putObjectMultipartStreamNoChecksum(bucketName, objectName string,
|
|
reader io.Reader, size int64, metadata map[string][]string, progress io.Reader) (n int64, err error) {
|
|
// Input validation.
|
|
if err = s3utils.CheckValidBucketName(bucketName); err != nil {
|
|
return 0, err
|
|
}
|
|
if err = s3utils.CheckValidObjectName(objectName); err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
// Calculate the optimal parts info for a given size.
|
|
totalPartsCount, partSize, lastPartSize, err := optimalPartInfo(size)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
// Initiates a new multipart request
|
|
uploadID, err := c.newUploadID(bucketName, objectName, metadata)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
// Aborts the multipart upload if the function returns
|
|
// any error, since we do not resume we should purge
|
|
// the parts which have been uploaded to relinquish
|
|
// storage space.
|
|
defer func() {
|
|
if err != nil {
|
|
c.abortMultipartUpload(bucketName, objectName, uploadID)
|
|
}
|
|
}()
|
|
|
|
// Total data read and written to server. should be equal to 'size' at the end of the call.
|
|
var totalUploadedSize int64
|
|
|
|
// Initialize parts uploaded map.
|
|
partsInfo := make(map[int]ObjectPart)
|
|
|
|
// Part number always starts with '1'.
|
|
var partNumber int
|
|
for partNumber = 1; partNumber <= totalPartsCount; partNumber++ {
|
|
// Update progress reader appropriately to the latest offset
|
|
// as we read from the source.
|
|
hookReader := newHook(reader, progress)
|
|
|
|
// Proceed to upload the part.
|
|
if partNumber == totalPartsCount {
|
|
partSize = lastPartSize
|
|
}
|
|
|
|
var objPart ObjectPart
|
|
objPart, err = c.uploadPart(bucketName, objectName, uploadID,
|
|
io.LimitReader(hookReader, partSize),
|
|
partNumber, nil, nil, partSize, metadata)
|
|
if err != nil {
|
|
return totalUploadedSize, err
|
|
}
|
|
|
|
// Save successfully uploaded part metadata.
|
|
partsInfo[partNumber] = objPart
|
|
|
|
// Save successfully uploaded size.
|
|
totalUploadedSize += partSize
|
|
}
|
|
|
|
// Verify if we uploaded all the data.
|
|
if size > 0 {
|
|
if totalUploadedSize != size {
|
|
return totalUploadedSize, ErrUnexpectedEOF(totalUploadedSize, size, bucketName, objectName)
|
|
}
|
|
}
|
|
|
|
// Complete multipart upload.
|
|
var complMultipartUpload completeMultipartUpload
|
|
|
|
// Loop over total uploaded parts to save them in
|
|
// Parts array before completing the multipart request.
|
|
for i := 1; i < partNumber; i++ {
|
|
part, ok := partsInfo[i]
|
|
if !ok {
|
|
return 0, ErrInvalidArgument(fmt.Sprintf("Missing part number %d", i))
|
|
}
|
|
complMultipartUpload.Parts = append(complMultipartUpload.Parts, CompletePart{
|
|
ETag: part.ETag,
|
|
PartNumber: part.PartNumber,
|
|
})
|
|
}
|
|
|
|
// Sort all completed parts.
|
|
sort.Sort(completedParts(complMultipartUpload.Parts))
|
|
_, err = c.completeMultipartUpload(bucketName, objectName, uploadID, complMultipartUpload)
|
|
if err != nil {
|
|
return totalUploadedSize, err
|
|
}
|
|
|
|
// Return final size.
|
|
return totalUploadedSize, nil
|
|
}
|
|
|
|
// putObjectNoChecksum special function used Google Cloud Storage. This special function
|
|
// is used for Google Cloud Storage since Google's multipart API is not S3 compatible.
|
|
func (c Client) putObjectNoChecksum(bucketName, objectName string, reader io.Reader, size int64, metaData map[string][]string, progress io.Reader) (n int64, err error) {
|
|
// Input validation.
|
|
if err := s3utils.CheckValidBucketName(bucketName); err != nil {
|
|
return 0, err
|
|
}
|
|
if err := s3utils.CheckValidObjectName(objectName); err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
// Size -1 is only supported on Google Cloud Storage, we error
|
|
// out in all other situations.
|
|
if size < 0 && !s3utils.IsGoogleEndpoint(c.endpointURL) {
|
|
return 0, ErrEntityTooSmall(size, bucketName, objectName)
|
|
}
|
|
if size > 0 {
|
|
if isReadAt(reader) && !isObject(reader) {
|
|
reader = io.NewSectionReader(reader.(io.ReaderAt), 0, size)
|
|
}
|
|
}
|
|
|
|
// Update progress reader appropriately to the latest offset as we
|
|
// read from the source.
|
|
readSeeker := newHook(reader, progress)
|
|
|
|
// This function does not calculate sha256 and md5sum for payload.
|
|
// Execute put object.
|
|
st, err := c.putObjectDo(bucketName, objectName, readSeeker, nil, nil, size, metaData)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
if st.Size != size {
|
|
return 0, ErrUnexpectedEOF(st.Size, size, bucketName, objectName)
|
|
}
|
|
return size, nil
|
|
}
|
|
|
|
// putObjectDo - executes the put object http operation.
|
|
// NOTE: You must have WRITE permissions on a bucket to add an object to it.
|
|
func (c Client) putObjectDo(bucketName, objectName string, reader io.Reader, md5Sum []byte, sha256Sum []byte, size int64, metaData map[string][]string) (ObjectInfo, error) {
|
|
// Input validation.
|
|
if err := s3utils.CheckValidBucketName(bucketName); err != nil {
|
|
return ObjectInfo{}, err
|
|
}
|
|
if err := s3utils.CheckValidObjectName(objectName); err != nil {
|
|
return ObjectInfo{}, err
|
|
}
|
|
|
|
// Set headers.
|
|
customHeader := make(http.Header)
|
|
|
|
// Set metadata to headers
|
|
for k, v := range metaData {
|
|
if len(v) > 0 {
|
|
customHeader.Set(k, v[0])
|
|
}
|
|
}
|
|
|
|
// If Content-Type is not provided, set the default application/octet-stream one
|
|
if v, ok := metaData["Content-Type"]; !ok || len(v) == 0 {
|
|
customHeader.Set("Content-Type", "application/octet-stream")
|
|
}
|
|
|
|
// Populate request metadata.
|
|
reqMetadata := requestMetadata{
|
|
bucketName: bucketName,
|
|
objectName: objectName,
|
|
customHeader: customHeader,
|
|
contentBody: reader,
|
|
contentLength: size,
|
|
contentMD5Bytes: md5Sum,
|
|
contentSHA256Bytes: sha256Sum,
|
|
}
|
|
|
|
// Execute PUT an objectName.
|
|
resp, err := c.executeMethod("PUT", reqMetadata)
|
|
defer closeResponse(resp)
|
|
if err != nil {
|
|
return ObjectInfo{}, err
|
|
}
|
|
if resp != nil {
|
|
if resp.StatusCode != http.StatusOK {
|
|
return ObjectInfo{}, httpRespToErrorResponse(resp, bucketName, objectName)
|
|
}
|
|
}
|
|
|
|
var objInfo ObjectInfo
|
|
// Trim off the odd double quotes from ETag in the beginning and end.
|
|
objInfo.ETag = strings.TrimPrefix(resp.Header.Get("ETag"), "\"")
|
|
objInfo.ETag = strings.TrimSuffix(objInfo.ETag, "\"")
|
|
// A success here means data was written to server successfully.
|
|
objInfo.Size = size
|
|
|
|
// Return here.
|
|
return objInfo, nil
|
|
}
|