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NEW API: GetObjectAttributes (#1921)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,201 @@ | ||
| /* | ||
| * MinIO Go Library for Amazon S3 Compatible Cloud Storage | ||
| * Copyright 2020 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. | ||
| */ | ||
|
|
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| package minio | ||
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| import ( | ||
| "context" | ||
| "encoding/xml" | ||
| "errors" | ||
| "net/http" | ||
| "net/url" | ||
| "strconv" | ||
| "time" | ||
|
|
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| "github.com/minio/minio-go/v7/pkg/encrypt" | ||
| "github.com/minio/minio-go/v7/pkg/s3utils" | ||
| ) | ||
|
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| // ObjectAttributesOptions are options used for the GetObjectAttributes API | ||
| // | ||
| // - MaxParts | ||
| // How many parts the caller wants to be returned (default: 1000) | ||
| // | ||
| // - VersionID | ||
| // The object version you want to attributes for | ||
| // | ||
| // - PartNumberMarker | ||
| // the listing will start AFTER the part matching PartNumberMarker | ||
| // | ||
| // - ServerSideEncryption | ||
| // The server-side encryption algorithm used when storing this object in Minio | ||
| type ObjectAttributesOptions struct { | ||
| MaxParts int | ||
| VersionID string | ||
| PartNumberMarker int | ||
| ServerSideEncryption encrypt.ServerSide | ||
| } | ||
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| // ObjectAttributes is the response object returned by the GetObjectAttributes API | ||
| // | ||
| // - VersionID | ||
| // The object version | ||
| // | ||
| // - LastModified | ||
| // The last time the object was modified | ||
| // | ||
| // - ObjectAttributesResponse | ||
| // Contains more information about the object | ||
| type ObjectAttributes struct { | ||
| VersionID string | ||
| LastModified time.Time | ||
| ObjectAttributesResponse | ||
| } | ||
|
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| // ObjectAttributesResponse contains details returned by the GetObjectAttributes API | ||
| // | ||
| // Noteworthy fields: | ||
| // | ||
| // - ObjectParts.PartsCount | ||
| // Contains the total part count for the object (not the current response) | ||
| // | ||
| // - ObjectParts.PartNumberMarker | ||
| // Pagination of parts will begin at (but not include) PartNumberMarker | ||
| // | ||
| // - ObjectParts.NextPartNumberMarket | ||
| // The next PartNumberMarker to be used in order to continue pagination | ||
| // | ||
| // - ObjectParts.IsTruncated | ||
| // Indicates if the last part is included in the request (does not check if parts are missing from the start of the list, ONLY the end) | ||
| // | ||
| // - ObjectParts.MaxParts | ||
| // Reflects the MaxParts used by the caller or the default MaxParts value of the API | ||
| type ObjectAttributesResponse struct { | ||
| ETag string `xml:",omitempty"` | ||
| StorageClass string | ||
| ObjectSize int | ||
| Checksum struct { | ||
| ChecksumCRC32 string `xml:",omitempty"` | ||
| ChecksumCRC32C string `xml:",omitempty"` | ||
| ChecksumSHA1 string `xml:",omitempty"` | ||
| ChecksumSHA256 string `xml:",omitempty"` | ||
| } | ||
| ObjectParts struct { | ||
| PartsCount int | ||
| PartNumberMarker int | ||
| NextPartNumberMarker int | ||
| MaxParts int | ||
| IsTruncated bool | ||
| Parts []*ObjectAttributePart `xml:"Part"` | ||
| } | ||
| } | ||
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| // ObjectAttributePart is used by ObjectAttributesResponse to describe an object part | ||
| type ObjectAttributePart struct { | ||
| ChecksumCRC32 string `xml:",omitempty"` | ||
| ChecksumCRC32C string `xml:",omitempty"` | ||
| ChecksumSHA1 string `xml:",omitempty"` | ||
| ChecksumSHA256 string `xml:",omitempty"` | ||
| PartNumber int | ||
| Size int | ||
| } | ||
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| func (o *ObjectAttributes) parseResponse(resp *http.Response) (err error) { | ||
| mod, err := parseRFC7231Time(resp.Header.Get("Last-Modified")) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| o.LastModified = mod | ||
| o.VersionID = resp.Header.Get(amzVersionID) | ||
|
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| response := new(ObjectAttributesResponse) | ||
| if err := xml.NewDecoder(resp.Body).Decode(response); err != nil { | ||
| return err | ||
| } | ||
| o.ObjectAttributesResponse = *response | ||
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| return | ||
| } | ||
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| // GetObjectAttributes API combines HeadObject and ListParts. | ||
| // More details on usage can be found in the documentation for ObjectAttributesOptions{} | ||
| func (c *Client) GetObjectAttributes(ctx context.Context, bucketName, objectName string, opts ObjectAttributesOptions) (*ObjectAttributes, error) { | ||
| if err := s3utils.CheckValidBucketName(bucketName); err != nil { | ||
| return nil, err | ||
| } | ||
|
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| if err := s3utils.CheckValidObjectName(objectName); err != nil { | ||
| return nil, err | ||
| } | ||
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| urlValues := make(url.Values) | ||
| urlValues.Add("attributes", "") | ||
| if opts.VersionID != "" { | ||
| urlValues.Add("versionId", opts.VersionID) | ||
| } | ||
|
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| headers := make(http.Header) | ||
| headers.Set(amzObjectAttributes, GetObjectAttributesTags) | ||
|
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| if opts.PartNumberMarker > 0 { | ||
| headers.Set(amzPartNumberMarker, strconv.Itoa(opts.PartNumberMarker)) | ||
| } | ||
|
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| if opts.MaxParts > 0 { | ||
| headers.Set(amzMaxParts, strconv.Itoa(opts.MaxParts)) | ||
| } else { | ||
| headers.Set(amzMaxParts, strconv.Itoa(GetObjectAttributesMaxParts)) | ||
| } | ||
|
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| if opts.ServerSideEncryption != nil { | ||
| opts.ServerSideEncryption.Marshal(headers) | ||
| } | ||
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| resp, err := c.executeMethod(ctx, http.MethodGet, requestMetadata{ | ||
| bucketName: bucketName, | ||
| objectName: objectName, | ||
| queryValues: urlValues, | ||
| contentSHA256Hex: emptySHA256Hex, | ||
| customHeader: headers, | ||
| }) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| defer closeResponse(resp) | ||
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| hasEtag := resp.Header.Get(ETag) | ||
| if hasEtag != "" { | ||
| return nil, errors.New("getObjectAttributes is not supported by the current endpoint version") | ||
| } | ||
|
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| if resp.StatusCode != http.StatusOK { | ||
| ER := new(ErrorResponse) | ||
| if err := xml.NewDecoder(resp.Body).Decode(ER); err != nil { | ||
| return nil, err | ||
| } | ||
|
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| return nil, *ER | ||
| } | ||
|
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| OA := new(ObjectAttributes) | ||
| err = OA.parseResponse(resp) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return OA, nil | ||
| } |
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