1 files changed, 580 insertions, 0 deletions
diff --git a/vendor/github.com/minio/minio-go/v7/api-compose-object.go b/vendor/github.com/minio/minio-go/v7/api-compose-object.go
new file mode 100644
index 00000000..dd597e46
--- /dev/null
+++ b/vendor/github.com/minio/minio-go/v7/api-compose-object.go
@@ -0,0 +1,580 @@
+/*
+ * MinIO Go Library for Amazon S3 Compatible Cloud Storage
+ * Copyright 2017, 2018 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 (
+	"context"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"net/url"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/minio/minio-go/v7/pkg/encrypt"
+	"github.com/minio/minio-go/v7/pkg/s3utils"
+)
+
+// CopyDestOptions represents options specified by user for CopyObject/ComposeObject APIs
+type CopyDestOptions struct {
+	Bucket string // points to destination bucket
+	Object string // points to destination object
+
+	// `Encryption` is the key info for server-side-encryption with customer
+	// provided key. If it is nil, no encryption is performed.
+	Encryption encrypt.ServerSide
+
+	// `userMeta` is the user-metadata key-value pairs to be set on the
+	// destination. The keys are automatically prefixed with `x-amz-meta-`
+	// if needed. If nil is passed, and if only a single source (of any
+	// size) is provided in the ComposeObject call, then metadata from the
+	// source is copied to the destination.
+	// if no user-metadata is provided, it is copied from source
+	// (when there is only once source object in the compose
+	// request)
+	UserMetadata map[string]string
+	// UserMetadata is only set to destination if ReplaceMetadata is true
+	// other value is UserMetadata is ignored and we preserve src.UserMetadata
+	// NOTE: if you set this value to true and now metadata is present
+	// in UserMetadata your destination object will not have any metadata
+	// set.
+	ReplaceMetadata bool
+
+	// `userTags` is the user defined object tags to be set on destination.
+	// This will be set only if the `replaceTags` field is set to true.
+	// Otherwise this field is ignored
+	UserTags    map[string]string
+	ReplaceTags bool
+
+	// Specifies whether you want to apply a Legal Hold to the copied object.
+	LegalHold LegalHoldStatus
+
+	// Object Retention related fields
+	Mode            RetentionMode
+	RetainUntilDate time.Time
+
+	Size int64 // Needs to be specified if progress bar is specified.
+	// Progress of the entire copy operation will be sent here.
+	Progress io.Reader
+}
+
+// Process custom-metadata to remove a `x-amz-meta-` prefix if
+// present and validate that keys are distinct (after this
+// prefix removal).
+func filterCustomMeta(userMeta map[string]string) map[string]string {
+	m := make(map[string]string)
+	for k, v := range userMeta {
+		if strings.HasPrefix(strings.ToLower(k), "x-amz-meta-") {
+			k = k[len("x-amz-meta-"):]
+		}
+		if _, ok := m[k]; ok {
+			continue
+		}
+		m[k] = v
+	}
+	return m
+}
+
+// Marshal converts all the CopyDestOptions into their
+// equivalent HTTP header representation
+func (opts CopyDestOptions) Marshal(header http.Header) {
+	const replaceDirective = "REPLACE"
+	if opts.ReplaceTags {
+		header.Set(amzTaggingHeaderDirective, replaceDirective)
+		if tags := s3utils.TagEncode(opts.UserTags); tags != "" {
+			header.Set(amzTaggingHeader, tags)
+		}
+	}
+
+	if opts.LegalHold != LegalHoldStatus("") {
+		header.Set(amzLegalHoldHeader, opts.LegalHold.String())
+	}
+
+	if opts.Mode != RetentionMode("") && !opts.RetainUntilDate.IsZero() {
+		header.Set(amzLockMode, opts.Mode.String())
+		header.Set(amzLockRetainUntil, opts.RetainUntilDate.Format(time.RFC3339))
+	}
+
+	if opts.Encryption != nil {
+		opts.Encryption.Marshal(header)
+	}
+
+	if opts.ReplaceMetadata {
+		header.Set("x-amz-metadata-directive", replaceDirective)
+		for k, v := range filterCustomMeta(opts.UserMetadata) {
+			if isAmzHeader(k) || isStandardHeader(k) || isStorageClassHeader(k) {
+				header.Set(k, v)
+			} else {
+				header.Set("x-amz-meta-"+k, v)
+			}
+		}
+	}
+}
+
+// toDestinationInfo returns a validated copyOptions object.
+func (opts CopyDestOptions) validate() (err error) {
+	// Input validation.
+	if err = s3utils.CheckValidBucketName(opts.Bucket); err != nil {
+		return err
+	}
+	if err = s3utils.CheckValidObjectName(opts.Object); err != nil {
+		return err
+	}
+	if opts.Progress != nil && opts.Size < 0 {
+		return errInvalidArgument("For progress bar effective size needs to be specified")
+	}
+	return nil
+}
+
+// CopySrcOptions represents a source object to be copied, using
+// server-side copying APIs.
+type CopySrcOptions struct {
+	Bucket, Object       string
+	VersionID            string
+	MatchETag            string
+	NoMatchETag          string
+	MatchModifiedSince   time.Time
+	MatchUnmodifiedSince time.Time
+	MatchRange           bool
+	Start, End           int64
+	Encryption           encrypt.ServerSide
+}
+
+// Marshal converts all the CopySrcOptions into their
+// equivalent HTTP header representation
+func (opts CopySrcOptions) Marshal(header http.Header) {
+	// Set the source header
+	header.Set("x-amz-copy-source", s3utils.EncodePath(opts.Bucket+"/"+opts.Object))
+	if opts.VersionID != "" {
+		header.Set("x-amz-copy-source", s3utils.EncodePath(opts.Bucket+"/"+opts.Object)+"?versionId="+opts.VersionID)
+	}
+
+	if opts.MatchETag != "" {
+		header.Set("x-amz-copy-source-if-match", opts.MatchETag)
+	}
+	if opts.NoMatchETag != "" {
+		header.Set("x-amz-copy-source-if-none-match", opts.NoMatchETag)
+	}
+
+	if !opts.MatchModifiedSince.IsZero() {
+		header.Set("x-amz-copy-source-if-modified-since", opts.MatchModifiedSince.Format(http.TimeFormat))
+	}
+	if !opts.MatchUnmodifiedSince.IsZero() {
+		header.Set("x-amz-copy-source-if-unmodified-since", opts.MatchUnmodifiedSince.Format(http.TimeFormat))
+	}
+
+	if opts.Encryption != nil {
+		encrypt.SSECopy(opts.Encryption).Marshal(header)
+	}
+}
+
+func (opts CopySrcOptions) validate() (err error) {
+	// Input validation.
+	if err = s3utils.CheckValidBucketName(opts.Bucket); err != nil {
+		return err
+	}
+	if err = s3utils.CheckValidObjectName(opts.Object); err != nil {
+		return err
+	}
+	if opts.Start > opts.End || opts.Start < 0 {
+		return errInvalidArgument("start must be non-negative, and start must be at most end.")
+	}
+	return nil
+}
+
+// Low level implementation of CopyObject API, supports only upto 5GiB worth of copy.
+func (c Client) copyObjectDo(ctx context.Context, srcBucket, srcObject, destBucket, destObject string,
+	metadata map[string]string, srcOpts CopySrcOptions, dstOpts PutObjectOptions) (ObjectInfo, error) {
+
+	// Build headers.
+	headers := make(http.Header)
+
+	// Set all the metadata headers.
+	for k, v := range metadata {
+		headers.Set(k, v)
+	}
+	if !dstOpts.Internal.ReplicationStatus.Empty() {
+		headers.Set(amzBucketReplicationStatus, string(dstOpts.Internal.ReplicationStatus))
+	}
+	if !dstOpts.Internal.SourceMTime.IsZero() {
+		headers.Set(minIOBucketSourceMTime, dstOpts.Internal.SourceMTime.Format(time.RFC3339Nano))
+	}
+	if dstOpts.Internal.SourceETag != "" {
+		headers.Set(minIOBucketSourceETag, dstOpts.Internal.SourceETag)
+	}
+	if dstOpts.Internal.ReplicationRequest {
+		headers.Set(minIOBucketReplicationRequest, "")
+	}
+	if len(dstOpts.UserTags) != 0 {
+		headers.Set(amzTaggingHeader, s3utils.TagEncode(dstOpts.UserTags))
+	}
+
+	reqMetadata := requestMetadata{
+		bucketName:   destBucket,
+		objectName:   destObject,
+		customHeader: headers,
+	}
+	if dstOpts.Internal.SourceVersionID != "" {
+		if _, err := uuid.Parse(dstOpts.Internal.SourceVersionID); err != nil {
+			return ObjectInfo{}, errInvalidArgument(err.Error())
+		}
+		urlValues := make(url.Values)
+		urlValues.Set("versionId", dstOpts.Internal.SourceVersionID)
+		reqMetadata.queryValues = urlValues
+	}
+
+	// Set the source header
+	headers.Set("x-amz-copy-source", s3utils.EncodePath(srcBucket+"/"+srcObject))
+	if srcOpts.VersionID != "" {
+		headers.Set("x-amz-copy-source", s3utils.EncodePath(srcBucket+"/"+srcObject)+"?versionId="+srcOpts.VersionID)
+	}
+	// Send upload-part-copy request
+	resp, err := c.executeMethod(ctx, http.MethodPut, reqMetadata)
+	defer closeResponse(resp)
+	if err != nil {
+		return ObjectInfo{}, err
+	}
+
+	// Check if we got an error response.
+	if resp.StatusCode != http.StatusOK {
+		return ObjectInfo{}, httpRespToErrorResponse(resp, srcBucket, srcObject)
+	}
+
+	cpObjRes := copyObjectResult{}
+	err = xmlDecoder(resp.Body, &cpObjRes)
+	if err != nil {
+		return ObjectInfo{}, err
+	}
+
+	objInfo := ObjectInfo{
+		Key:          destObject,
+		ETag:         strings.Trim(cpObjRes.ETag, "\""),
+		LastModified: cpObjRes.LastModified,
+	}
+	return objInfo, nil
+}
+
+func (c Client) copyObjectPartDo(ctx context.Context, srcBucket, srcObject, destBucket, destObject string, uploadID string,
+	partID int, startOffset int64, length int64, metadata map[string]string) (p CompletePart, err error) {
+
+	headers := make(http.Header)
+
+	// Set source
+	headers.Set("x-amz-copy-source", s3utils.EncodePath(srcBucket+"/"+srcObject))
+
+	if startOffset < 0 {
+		return p, errInvalidArgument("startOffset must be non-negative")
+	}
+
+	if length >= 0 {
+		headers.Set("x-amz-copy-source-range", fmt.Sprintf("bytes=%d-%d", startOffset, startOffset+length-1))
+	}
+
+	for k, v := range metadata {
+		headers.Set(k, v)
+	}
+
+	queryValues := make(url.Values)
+	queryValues.Set("partNumber", strconv.Itoa(partID))
+	queryValues.Set("uploadId", uploadID)
+
+	resp, err := c.executeMethod(ctx, http.MethodPut, requestMetadata{
+		bucketName:   destBucket,
+		objectName:   destObject,
+		customHeader: headers,
+		queryValues:  queryValues,
+	})
+	defer closeResponse(resp)
+	if err != nil {
+		return
+	}
+
+	// Check if we got an error response.
+	if resp.StatusCode != http.StatusOK {
+		return p, httpRespToErrorResponse(resp, destBucket, destObject)
+	}
+
+	// Decode copy-part response on success.
+	cpObjRes := copyObjectResult{}
+	err = xmlDecoder(resp.Body, &cpObjRes)
+	if err != nil {
+		return p, err
+	}
+	p.PartNumber, p.ETag = partID, cpObjRes.ETag
+	return p, nil
+}
+
+// uploadPartCopy - helper function to create a part in a multipart
+// upload via an upload-part-copy request
+// https://docs.aws.amazon.com/AmazonS3/latest/API/mpUploadUploadPartCopy.html
+func (c Client) uploadPartCopy(ctx context.Context, bucket, object, uploadID string, partNumber int,
+	headers http.Header) (p CompletePart, err error) {
+
+	// Build query parameters
+	urlValues := make(url.Values)
+	urlValues.Set("partNumber", strconv.Itoa(partNumber))
+	urlValues.Set("uploadId", uploadID)
+
+	// Send upload-part-copy request
+	resp, err := c.executeMethod(ctx, http.MethodPut, requestMetadata{
+		bucketName:   bucket,
+		objectName:   object,
+		customHeader: headers,
+		queryValues:  urlValues,
+	})
+	defer closeResponse(resp)
+	if err != nil {
+		return p, err
+	}
+
+	// Check if we got an error response.
+	if resp.StatusCode != http.StatusOK {
+		return p, httpRespToErrorResponse(resp, bucket, object)
+	}
+
+	// Decode copy-part response on success.
+	cpObjRes := copyObjectResult{}
+	err = xmlDecoder(resp.Body, &cpObjRes)
+	if err != nil {
+		return p, err
+	}
+	p.PartNumber, p.ETag = partNumber, cpObjRes.ETag
+	return p, nil
+}
+
+// ComposeObject - creates an object using server-side copying
+// of existing objects. It takes a list of source objects (with optional offsets)
+// and concatenates them into a new object using only server-side copying
+// operations. Optionally takes progress reader hook for applications to
+// look at current progress.
+func (c Client) ComposeObject(ctx context.Context, dst CopyDestOptions, srcs ...CopySrcOptions) (UploadInfo, error) {
+	if len(srcs) < 1 || len(srcs) > maxPartsCount {
+		return UploadInfo{}, errInvalidArgument("There must be as least one and up to 10000 source objects.")
+	}
+
+	for _, src := range srcs {
+		if err := src.validate(); err != nil {
+			return UploadInfo{}, err
+		}
+	}
+
+	if err := dst.validate(); err != nil {
+		return UploadInfo{}, err
+	}
+
+	srcObjectInfos := make([]ObjectInfo, len(srcs))
+	srcObjectSizes := make([]int64, len(srcs))
+	var totalSize, totalParts int64
+	var err error
+	for i, src := range srcs {
+		opts := StatObjectOptions{ServerSideEncryption: encrypt.SSE(src.Encryption), VersionID: src.VersionID}
+		srcObjectInfos[i], err = c.statObject(context.Background(), src.Bucket, src.Object, opts)
+		if err != nil {
+			return UploadInfo{}, err
+		}
+
+		srcCopySize := srcObjectInfos[i].Size
+		// Check if a segment is specified, and if so, is the
+		// segment within object bounds?
+		if src.MatchRange {
+			// Since range is specified,
+			//    0 <= src.start <= src.end
+			// so only invalid case to check is:
+			if src.End >= srcCopySize || src.Start < 0 {
+				return UploadInfo{}, errInvalidArgument(
+					fmt.Sprintf("CopySrcOptions %d has invalid segment-to-copy [%d, %d] (size is %d)",
+						i, src.Start, src.End, srcCopySize))
+			}
+			srcCopySize = src.End - src.Start + 1
+		}
+
+		// Only the last source may be less than `absMinPartSize`
+		if srcCopySize < absMinPartSize && i < len(srcs)-1 {
+			return UploadInfo{}, errInvalidArgument(
+				fmt.Sprintf("CopySrcOptions %d is too small (%d) and it is not the last part", i, srcCopySize))
+		}
+
+		// Is data to copy too large?
+		totalSize += srcCopySize
+		if totalSize > maxMultipartPutObjectSize {
+			return UploadInfo{}, errInvalidArgument(fmt.Sprintf("Cannot compose an object of size %d (> 5TiB)", totalSize))
+		}
+
+		// record source size
+		srcObjectSizes[i] = srcCopySize
+
+		// calculate parts needed for current source
+		totalParts += partsRequired(srcCopySize)
+		// Do we need more parts than we are allowed?
+		if totalParts > maxPartsCount {
+			return UploadInfo{}, errInvalidArgument(fmt.Sprintf(
+				"Your proposed compose object requires more than %d parts", maxPartsCount))
+		}
+	}
+
+	// Single source object case (i.e. when only one source is
+	// involved, it is being copied wholly and at most 5GiB in
+	// size, emptyfiles are also supported).
+	if (totalParts == 1 && srcs[0].Start == -1 && totalSize <= maxPartSize) || (totalSize == 0) {
+		return c.CopyObject(ctx, dst, srcs[0])
+	}
+
+	// Now, handle multipart-copy cases.
+
+	// 1. Ensure that the object has not been changed while
+	//    we are copying data.
+	for i, src := range srcs {
+		src.MatchETag = srcObjectInfos[i].ETag
+	}
+
+	// 2. Initiate a new multipart upload.
+
+	// Set user-metadata on the destination object. If no
+	// user-metadata is specified, and there is only one source,
+	// (only) then metadata from source is copied.
+	var userMeta map[string]string
+	if dst.ReplaceMetadata {
+		userMeta = dst.UserMetadata
+	} else {
+		userMeta = srcObjectInfos[0].UserMetadata
+	}
+
+	var userTags map[string]string
+	if dst.ReplaceTags {
+		userTags = dst.UserTags
+	} else {
+		userTags = srcObjectInfos[0].UserTags
+	}
+
+	uploadID, err := c.newUploadID(ctx, dst.Bucket, dst.Object, PutObjectOptions{
+		ServerSideEncryption: dst.Encryption,
+		UserMetadata:         userMeta,
+		UserTags:             userTags,
+		Mode:                 dst.Mode,
+		RetainUntilDate:      dst.RetainUntilDate,
+		LegalHold:            dst.LegalHold,
+	})
+	if err != nil {
+		return UploadInfo{}, err
+	}
+
+	// 3. Perform copy part uploads
+	objParts := []CompletePart{}
+	partIndex := 1
+	for i, src := range srcs {
+		var h = make(http.Header)
+		src.Marshal(h)
+		if dst.Encryption != nil && dst.Encryption.Type() == encrypt.SSEC {
+			dst.Encryption.Marshal(h)
+		}
+
+		// calculate start/end indices of parts after
+		// splitting.
+		startIdx, endIdx := calculateEvenSplits(srcObjectSizes[i], src)
+		for j, start := range startIdx {
+			end := endIdx[j]
+
+			// Add (or reset) source range header for
+			// upload part copy request.
+			h.Set("x-amz-copy-source-range",
+				fmt.Sprintf("bytes=%d-%d", start, end))
+
+			// make upload-part-copy request
+			complPart, err := c.uploadPartCopy(ctx, dst.Bucket,
+				dst.Object, uploadID, partIndex, h)
+			if err != nil {
+				return UploadInfo{}, err
+			}
+			if dst.Progress != nil {
+				io.CopyN(ioutil.Discard, dst.Progress, end-start+1)
+			}
+			objParts = append(objParts, complPart)
+			partIndex++
+		}
+	}
+
+	// 4. Make final complete-multipart request.
+	uploadInfo, err := c.completeMultipartUpload(ctx, dst.Bucket, dst.Object, uploadID,
+		completeMultipartUpload{Parts: objParts})
+	if err != nil {
+		return UploadInfo{}, err
+	}
+
+	uploadInfo.Size = totalSize
+	return uploadInfo, nil
+}
+
+// partsRequired is maximum parts possible with
+// max part size of ceiling(maxMultipartPutObjectSize / (maxPartsCount - 1))
+func partsRequired(size int64) int64 {
+	maxPartSize := maxMultipartPutObjectSize / (maxPartsCount - 1)
+	r := size / int64(maxPartSize)
+	if size%int64(maxPartSize) > 0 {
+		r++
+	}
+	return r
+}
+
+// calculateEvenSplits - computes splits for a source and returns
+// start and end index slices. Splits happen evenly to be sure that no
+// part is less than 5MiB, as that could fail the multipart request if
+// it is not the last part.
+func calculateEvenSplits(size int64, src CopySrcOptions) (startIndex, endIndex []int64) {
+	if size == 0 {
+		return
+	}
+
+	reqParts := partsRequired(size)
+	startIndex = make([]int64, reqParts)
+	endIndex = make([]int64, reqParts)
+	// Compute number of required parts `k`, as:
+	//
+	// k = ceiling(size / copyPartSize)
+	//
+	// Now, distribute the `size` bytes in the source into
+	// k parts as evenly as possible:
+	//
+	// r parts sized (q+1) bytes, and
+	// (k - r) parts sized q bytes, where
+	//
+	// size = q * k + r (by simple division of size by k,
+	// so that 0 <= r < k)
+	//
+	start := src.Start
+	if start == -1 {
+		start = 0
+	}
+	quot, rem := size/reqParts, size%reqParts
+	nextStart := start
+	for j := int64(0); j < reqParts; j++ {
+		curPartSize := quot
+		if j < rem {
+			curPartSize++
+		}
+
+		cStart := nextStart
+		cEnd := cStart + curPartSize - 1
+		nextStart = cEnd + 1
+
+		startIndex[j], endIndex[j] = cStart, cEnd
+	}
+	return
+}