Update vendor

vendor/github.com/minio/minio-go/v7/api-stat.go

@@ -0,0 +1,127 @@
+/*
+ * MinIO Go Library for Amazon S3 Compatible Cloud Storage
+ * Copyright 2015-2020 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.
+ */
+
+package minio
+
+import (
+	"context"
+	"net/http"
+	"net/url"
+
+	"github.com/minio/minio-go/v7/pkg/s3utils"
+)
+
+// BucketExists verifies if bucket exists and you have permission to access it. Allows for a Context to
+// control cancellations and timeouts.
+func (c Client) BucketExists(ctx context.Context, bucketName string) (bool, error) {
+	// Input validation.
+	if err := s3utils.CheckValidBucketName(bucketName); err != nil {
+		return false, err
+	}
+
+	// Execute HEAD on bucketName.
+	resp, err := c.executeMethod(ctx, http.MethodHead, requestMetadata{
+		bucketName:       bucketName,
+		contentSHA256Hex: emptySHA256Hex,
+	})
+	defer closeResponse(resp)
+	if err != nil {
+		if ToErrorResponse(err).Code == "NoSuchBucket" {
+			return false, nil
+		}
+		return false, err
+	}
+	if resp != nil {
+		resperr := httpRespToErrorResponse(resp, bucketName, "")
+		if ToErrorResponse(resperr).Code == "NoSuchBucket" {
+			return false, nil
+		}
+		if resp.StatusCode != http.StatusOK {
+			return false, httpRespToErrorResponse(resp, bucketName, "")
+		}
+	}
+	return true, nil
+}
+
+// StatObject verifies if object exists and you have permission to access.
+func (c Client) StatObject(ctx context.Context, bucketName, objectName string, opts StatObjectOptions) (ObjectInfo, error) {
+	// Input validation.
+	if err := s3utils.CheckValidBucketName(bucketName); err != nil {
+		return ObjectInfo{}, err
+	}
+	if err := s3utils.CheckValidObjectName(objectName); err != nil {
+		return ObjectInfo{}, err
+	}
+	return c.statObject(ctx, bucketName, objectName, opts)
+}
+
+// Lower level API for statObject supporting pre-conditions and range headers.
+func (c Client) statObject(ctx context.Context, bucketName, objectName string, opts StatObjectOptions) (ObjectInfo, error) {
+	// Input validation.
+	if err := s3utils.CheckValidBucketName(bucketName); err != nil {
+		return ObjectInfo{}, err
+	}
+	if err := s3utils.CheckValidObjectName(objectName); err != nil {
+		return ObjectInfo{}, err
+	}
+	headers := opts.Header()
+	if opts.Internal.ReplicationDeleteMarker {
+		headers.Set(minIOBucketReplicationDeleteMarker, "true")
+	}
+
+	urlValues := make(url.Values)
+	if opts.VersionID != "" {
+		urlValues.Set("versionId", opts.VersionID)
+	}
+	// Execute HEAD on objectName.
+	resp, err := c.executeMethod(ctx, http.MethodHead, requestMetadata{
+		bucketName:       bucketName,
+		objectName:       objectName,
+		queryValues:      urlValues,
+		contentSHA256Hex: emptySHA256Hex,
+		customHeader:     headers,
+	})
+	defer closeResponse(resp)
+	if err != nil {
+		return ObjectInfo{}, err
+	}
+	deleteMarker := resp.Header.Get(amzDeleteMarker) == "true"
+
+	if resp != nil {
+		if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusPartialContent {
+			if resp.StatusCode == http.StatusBadRequest && opts.VersionID != "" && deleteMarker {
+				errResp := ErrorResponse{
+					StatusCode: resp.StatusCode,
+					Code:       "MethodNotAllowed",
+					Message:    "The specified method is not allowed against this resource.",
+					BucketName: bucketName,
+					Key:        objectName,
+				}
+				return ObjectInfo{
+					VersionID:      resp.Header.Get(amzVersionID),
+					IsDeleteMarker: deleteMarker,
+				}, errResp
+			}
+			return ObjectInfo{
+				VersionID:      resp.Header.Get(amzVersionID),
+				IsDeleteMarker: deleteMarker,
+			}, httpRespToErrorResponse(resp, bucketName, objectName)
+		}
+	}
+
+	return ToObjectInfo(bucketName, objectName, resp.Header)
+}