mirror of
https://github.com/octoleo/restic.git
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264 lines
8.2 KiB
Go
264 lines
8.2 KiB
Go
/*
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* Minio Go Library for Amazon S3 Compatible Cloud Storage
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* Copyright 2015-2017 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package minio
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import (
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"bytes"
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"context"
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"fmt"
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"io"
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"net/http"
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"runtime/debug"
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"sort"
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"github.com/minio/minio-go/pkg/encrypt"
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"github.com/minio/minio-go/pkg/s3utils"
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"golang.org/x/net/lex/httplex"
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)
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// PutObjectOptions represents options specified by user for PutObject call
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type PutObjectOptions struct {
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UserMetadata map[string]string
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Progress io.Reader
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ContentType string
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ContentEncoding string
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ContentDisposition string
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ContentLanguage string
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CacheControl string
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ServerSideEncryption encrypt.ServerSide
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NumThreads uint
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StorageClass string
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}
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// getNumThreads - gets the number of threads to be used in the multipart
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// put object operation
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func (opts PutObjectOptions) getNumThreads() (numThreads int) {
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if opts.NumThreads > 0 {
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numThreads = int(opts.NumThreads)
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} else {
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numThreads = totalWorkers
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}
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return
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}
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// Header - constructs the headers from metadata entered by user in
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// PutObjectOptions struct
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func (opts PutObjectOptions) Header() (header http.Header) {
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header = make(http.Header)
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if opts.ContentType != "" {
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header["Content-Type"] = []string{opts.ContentType}
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} else {
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header["Content-Type"] = []string{"application/octet-stream"}
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}
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if opts.ContentEncoding != "" {
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header["Content-Encoding"] = []string{opts.ContentEncoding}
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}
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if opts.ContentDisposition != "" {
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header["Content-Disposition"] = []string{opts.ContentDisposition}
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}
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if opts.ContentLanguage != "" {
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header["Content-Language"] = []string{opts.ContentLanguage}
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}
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if opts.CacheControl != "" {
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header["Cache-Control"] = []string{opts.CacheControl}
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}
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if opts.ServerSideEncryption != nil {
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opts.ServerSideEncryption.Marshal(header)
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}
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if opts.StorageClass != "" {
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header[amzStorageClass] = []string{opts.StorageClass}
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}
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for k, v := range opts.UserMetadata {
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if !isAmzHeader(k) && !isStandardHeader(k) && !isStorageClassHeader(k) {
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header["X-Amz-Meta-"+k] = []string{v}
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} else {
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header[k] = []string{v}
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}
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}
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return
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}
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// validate() checks if the UserMetadata map has standard headers or and raises an error if so.
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func (opts PutObjectOptions) validate() (err error) {
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for k, v := range opts.UserMetadata {
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if !httplex.ValidHeaderFieldName(k) || isStandardHeader(k) || isSSEHeader(k) || isStorageClassHeader(k) {
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return ErrInvalidArgument(k + " unsupported user defined metadata name")
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}
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if !httplex.ValidHeaderFieldValue(v) {
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return ErrInvalidArgument(v + " unsupported user defined metadata value")
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}
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}
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return nil
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}
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// completedParts is a collection of parts sortable by their part numbers.
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// used for sorting the uploaded parts before completing the multipart request.
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type completedParts []CompletePart
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func (a completedParts) Len() int { return len(a) }
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func (a completedParts) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
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func (a completedParts) Less(i, j int) bool { return a[i].PartNumber < a[j].PartNumber }
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// PutObject creates an object in a bucket.
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//
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// You must have WRITE permissions on a bucket to create an object.
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//
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// - For size smaller than 64MiB PutObject automatically does a
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// single atomic Put operation.
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// - For size larger than 64MiB PutObject automatically does a
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// multipart Put operation.
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// - For size input as -1 PutObject does a multipart Put operation
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// until input stream reaches EOF. Maximum object size that can
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// be uploaded through this operation will be 5TiB.
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func (c Client) PutObject(bucketName, objectName string, reader io.Reader, objectSize int64,
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opts PutObjectOptions) (n int64, err error) {
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return c.PutObjectWithContext(context.Background(), bucketName, objectName, reader, objectSize, opts)
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}
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func (c Client) putObjectCommon(ctx context.Context, bucketName, objectName string, reader io.Reader, size int64, opts PutObjectOptions) (n int64, err error) {
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// Check for largest object size allowed.
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if size > int64(maxMultipartPutObjectSize) {
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return 0, ErrEntityTooLarge(size, maxMultipartPutObjectSize, bucketName, objectName)
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}
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// NOTE: Streaming signature is not supported by GCS.
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if s3utils.IsGoogleEndpoint(*c.endpointURL) {
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// Do not compute MD5 for Google Cloud Storage.
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return c.putObjectNoChecksum(ctx, bucketName, objectName, reader, size, opts)
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}
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if c.overrideSignerType.IsV2() {
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if size >= 0 && size < minPartSize {
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return c.putObjectNoChecksum(ctx, bucketName, objectName, reader, size, opts)
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}
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return c.putObjectMultipart(ctx, bucketName, objectName, reader, size, opts)
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}
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if size < 0 {
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return c.putObjectMultipartStreamNoLength(ctx, bucketName, objectName, reader, opts)
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}
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if size < minPartSize {
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return c.putObjectNoChecksum(ctx, bucketName, objectName, reader, size, opts)
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}
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// For all sizes greater than 64MiB do multipart.
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return c.putObjectMultipartStream(ctx, bucketName, objectName, reader, size, opts)
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}
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func (c Client) putObjectMultipartStreamNoLength(ctx context.Context, bucketName, objectName string, reader io.Reader, opts PutObjectOptions) (n int64, err error) {
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// Input validation.
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if err = s3utils.CheckValidBucketName(bucketName); err != nil {
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return 0, err
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}
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if err = s3utils.CheckValidObjectName(objectName); err != nil {
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return 0, err
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}
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// Total data read and written to server. should be equal to
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// 'size' at the end of the call.
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var totalUploadedSize int64
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// Complete multipart upload.
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var complMultipartUpload completeMultipartUpload
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// Calculate the optimal parts info for a given size.
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totalPartsCount, partSize, _, err := optimalPartInfo(-1)
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if err != nil {
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return 0, err
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}
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// Initiate a new multipart upload.
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uploadID, err := c.newUploadID(ctx, bucketName, objectName, opts)
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if err != nil {
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return 0, err
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}
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defer func() {
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if err != nil {
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c.abortMultipartUpload(ctx, bucketName, objectName, uploadID)
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}
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}()
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// Part number always starts with '1'.
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partNumber := 1
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// Initialize parts uploaded map.
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partsInfo := make(map[int]ObjectPart)
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// Create a buffer.
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buf := make([]byte, partSize)
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defer debug.FreeOSMemory()
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for partNumber <= totalPartsCount {
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length, rErr := io.ReadFull(reader, buf)
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if rErr == io.EOF && partNumber > 1 {
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break
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}
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if rErr != nil && rErr != io.ErrUnexpectedEOF {
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return 0, rErr
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}
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// Update progress reader appropriately to the latest offset
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// as we read from the source.
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rd := newHook(bytes.NewReader(buf[:length]), opts.Progress)
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// Proceed to upload the part.
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var objPart ObjectPart
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objPart, err = c.uploadPart(ctx, bucketName, objectName, uploadID, rd, partNumber,
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"", "", int64(length), opts.ServerSideEncryption)
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if err != nil {
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return totalUploadedSize, err
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}
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// Save successfully uploaded part metadata.
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partsInfo[partNumber] = objPart
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// Save successfully uploaded size.
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totalUploadedSize += int64(length)
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// Increment part number.
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partNumber++
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// For unknown size, Read EOF we break away.
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// We do not have to upload till totalPartsCount.
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if rErr == io.EOF {
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break
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}
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}
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// Loop over total uploaded parts to save them in
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// Parts array before completing the multipart request.
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for i := 1; i < partNumber; i++ {
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part, ok := partsInfo[i]
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if !ok {
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return 0, ErrInvalidArgument(fmt.Sprintf("Missing part number %d", i))
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}
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complMultipartUpload.Parts = append(complMultipartUpload.Parts, CompletePart{
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ETag: part.ETag,
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PartNumber: part.PartNumber,
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})
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}
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// Sort all completed parts.
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sort.Sort(completedParts(complMultipartUpload.Parts))
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if _, err = c.completeMultipartUpload(ctx, bucketName, objectName, uploadID, complMultipartUpload); err != nil {
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return totalUploadedSize, err
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}
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// Return final size.
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return totalUploadedSize, nil
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}
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