1 files changed, 168 insertions, 0 deletions
diff --git a/api-object-retention.go b/api-object-retention.go
new file mode 100644
index 0000000..8aa08f0
--- /dev/null
+++ b/api-object-retention.go
@@ -0,0 +1,168 @@
+/*
+ * MinIO Go Library for Amazon S3 Compatible Cloud Storage
+ * Copyright 2019 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 (
+	"bytes"
+	"context"
+	"encoding/xml"
+	"fmt"
+	"net/http"
+	"net/url"
+	"time"
+
+	"github.com/minio/minio-go/v6/pkg/s3utils"
+)
+
+// objectRetention - object retention specified in
+// https://docs.aws.amazon.com/AmazonS3/latest/API/Type_API_ObjectLockConfiguration.html
+type objectRetention struct {
+	XMLNS           string        `xml:"xmlns,attr,omitempty"`
+	XMLName         xml.Name      `xml:"Retention"`
+	Mode            RetentionMode `xml:"Mode"`
+	RetainUntilDate time.Time     `type:"timestamp" timestampFormat:"iso8601" xml:"RetainUntilDate"`
+}
+
+func newObjectRetention(mode *RetentionMode, date *time.Time) (*objectRetention, error) {
+	if mode == nil {
+		return nil, fmt.Errorf("Mode not set")
+	}
+
+	if date == nil {
+		return nil, fmt.Errorf("RetainUntilDate not set")
+	}
+
+	if !mode.IsValid() {
+		return nil, fmt.Errorf("invalid retention mode `%v`", mode)
+	}
+	objectRetention := &objectRetention{
+		Mode:            *mode,
+		RetainUntilDate: *date,
+	}
+	return objectRetention, nil
+}
+
+// PutObjectRetentionOptions represents options specified by user for PutObject call
+type PutObjectRetentionOptions struct {
+	GovernanceBypass bool
+	Mode             *RetentionMode
+	RetainUntilDate  *time.Time
+	VersionID        string
+}
+
+// PutObjectRetention : sets object retention for a given object and versionID.
+func (c Client) PutObjectRetention(bucketName, objectName string, opts PutObjectRetentionOptions) error {
+	// Input validation.
+	if err := s3utils.CheckValidBucketName(bucketName); err != nil {
+		return err
+	}
+
+	if err := s3utils.CheckValidObjectName(objectName); err != nil {
+		return err
+	}
+
+	// Get resources properly escaped and lined up before
+	// using them in http request.
+	urlValues := make(url.Values)
+	urlValues.Set("retention", "")
+
+	if opts.VersionID != "" {
+		urlValues.Set("versionId", opts.VersionID)
+	}
+
+	retention, err := newObjectRetention(opts.Mode, opts.RetainUntilDate)
+	if err != nil {
+		return err
+	}
+
+	retentionData, err := xml.Marshal(retention)
+	if err != nil {
+		return err
+	}
+
+	// Build headers.
+	headers := make(http.Header)
+
+	if opts.GovernanceBypass {
+		// Set the bypass goverenance retention header
+		headers.Set("x-amz-bypass-governance-retention", "True")
+	}
+
+	reqMetadata := requestMetadata{
+		bucketName:       bucketName,
+		objectName:       objectName,
+		queryValues:      urlValues,
+		contentBody:      bytes.NewReader(retentionData),
+		contentLength:    int64(len(retentionData)),
+		contentMD5Base64: sumMD5Base64(retentionData),
+		contentSHA256Hex: sum256Hex(retentionData),
+		customHeader:     headers,
+	}
+
+	// Execute PUT Object Retention.
+	resp, err := c.executeMethod(context.Background(), "PUT", reqMetadata)
+	defer closeResponse(resp)
+	if err != nil {
+		return err
+	}
+	if resp != nil {
+		if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusNoContent {
+			return httpRespToErrorResponse(resp, bucketName, objectName)
+		}
+	}
+	return nil
+}
+
+// GetObjectRetention gets retention of given object.
+func (c Client) GetObjectRetention(bucketName, objectName, versionID string) (mode *RetentionMode, retainUntilDate *time.Time, err error) {
+	// Input validation.
+	if err := s3utils.CheckValidBucketName(bucketName); err != nil {
+		return nil, nil, err
+	}
+
+	if err := s3utils.CheckValidObjectName(objectName); err != nil {
+		return nil, nil, err
+	}
+	urlValues := make(url.Values)
+	urlValues.Set("retention", "")
+	if versionID != "" {
+		urlValues.Set("versionId", versionID)
+	}
+	// Execute GET on bucket to list objects.
+	resp, err := c.executeMethod(context.Background(), "GET", requestMetadata{
+		bucketName:       bucketName,
+		objectName:       objectName,
+		queryValues:      urlValues,
+		contentSHA256Hex: emptySHA256Hex,
+	})
+	defer closeResponse(resp)
+	if err != nil {
+		return nil, nil, err
+	}
+	if resp != nil {
+		if resp.StatusCode != http.StatusOK {
+			return nil, nil, httpRespToErrorResponse(resp, bucketName, objectName)
+		}
+	}
+	retention := &objectRetention{}
+	if err = xml.NewDecoder(resp.Body).Decode(retention); err != nil {
+		return nil, nil, err
+	}
+
+	return &retention.Mode, &retention.RetainUntilDate, nil
+}