mirror of
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111 lines
3.6 KiB
Go
111 lines
3.6 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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"context"
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"net/http"
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"github.com/minio/minio-go/v6/pkg/s3utils"
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)
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// BucketExists verify if bucket exists and you have permission to access it.
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func (c Client) BucketExists(bucketName string) (bool, error) {
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return c.BucketExistsWithContext(context.Background(), bucketName)
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}
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// BucketExistsWithContext verify if bucket exists and you have permission to access it. Allows for a Context to
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// control cancellations and timeouts.
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func (c Client) BucketExistsWithContext(ctx context.Context, bucketName string) (bool, error) {
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// Input validation.
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if err := s3utils.CheckValidBucketName(bucketName); err != nil {
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return false, err
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}
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// Execute HEAD on bucketName.
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resp, err := c.executeMethod(ctx, "HEAD", requestMetadata{
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bucketName: bucketName,
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contentSHA256Hex: emptySHA256Hex,
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})
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defer closeResponse(resp)
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if err != nil {
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if ToErrorResponse(err).Code == "NoSuchBucket" {
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return false, nil
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}
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return false, err
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}
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if resp != nil {
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resperr := httpRespToErrorResponse(resp, bucketName, "")
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if ToErrorResponse(resperr).Code == "NoSuchBucket" {
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return false, nil
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}
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if resp.StatusCode != http.StatusOK {
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return false, httpRespToErrorResponse(resp, bucketName, "")
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}
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}
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return true, nil
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}
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// StatObject verifies if object exists and you have permission to access.
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func (c Client) StatObject(bucketName, objectName string, opts StatObjectOptions) (ObjectInfo, error) {
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return c.StatObjectWithContext(context.Background(), bucketName, objectName, opts)
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}
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// StatObjectWithContext verifies if object exists and you have permission to access with a context to control
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// cancellations and timeouts.
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func (c Client) StatObjectWithContext(ctx context.Context, bucketName, objectName string, opts StatObjectOptions) (ObjectInfo, error) {
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// Input validation.
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if err := s3utils.CheckValidBucketName(bucketName); err != nil {
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return ObjectInfo{}, err
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}
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if err := s3utils.CheckValidObjectName(objectName); err != nil {
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return ObjectInfo{}, err
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}
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return c.statObject(ctx, bucketName, objectName, opts)
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}
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// Lower level API for statObject supporting pre-conditions and range headers.
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func (c Client) statObject(ctx context.Context, bucketName, objectName string, opts StatObjectOptions) (ObjectInfo, error) {
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// Input validation.
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if err := s3utils.CheckValidBucketName(bucketName); err != nil {
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return ObjectInfo{}, err
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}
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if err := s3utils.CheckValidObjectName(objectName); err != nil {
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return ObjectInfo{}, err
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}
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// Execute HEAD on objectName.
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resp, err := c.executeMethod(ctx, "HEAD", requestMetadata{
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bucketName: bucketName,
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objectName: objectName,
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contentSHA256Hex: emptySHA256Hex,
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customHeader: opts.Header(),
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})
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defer closeResponse(resp)
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if err != nil {
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return ObjectInfo{}, err
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}
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if resp != nil {
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if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusPartialContent {
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return ObjectInfo{}, httpRespToErrorResponse(resp, bucketName, objectName)
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}
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}
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return ToObjectInfo(bucketName, objectName, resp.Header)
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}
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