Update vendor

vendor/github.com/minio/minio-go/v7/api-bucket-policy.go

@@ -0,0 +1,142 @@
+/*
+ * 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.
+ */
+
+package minio
+
+import (
+	"context"
+	"io/ioutil"
+	"net/http"
+	"net/url"
+	"strings"
+
+	"github.com/minio/minio-go/v7/pkg/s3utils"
+)
+
+// SetBucketPolicy sets the access permissions on an existing bucket.
+func (c Client) SetBucketPolicy(ctx context.Context, bucketName, policy string) error {
+	// Input validation.
+	if err := s3utils.CheckValidBucketName(bucketName); err != nil {
+		return err
+	}
+
+	// If policy is empty then delete the bucket policy.
+	if policy == "" {
+		return c.removeBucketPolicy(ctx, bucketName)
+	}
+
+	// Save the updated policies.
+	return c.putBucketPolicy(ctx, bucketName, policy)
+}
+
+// Saves a new bucket policy.
+func (c Client) putBucketPolicy(ctx context.Context, bucketName, policy string) error {
+	// Get resources properly escaped and lined up before
+	// using them in http request.
+	urlValues := make(url.Values)
+	urlValues.Set("policy", "")
+
+	reqMetadata := requestMetadata{
+		bucketName:    bucketName,
+		queryValues:   urlValues,
+		contentBody:   strings.NewReader(policy),
+		contentLength: int64(len(policy)),
+	}
+
+	// Execute PUT to upload a new bucket policy.
+	resp, err := c.executeMethod(ctx, http.MethodPut, reqMetadata)
+	defer closeResponse(resp)
+	if err != nil {
+		return err
+	}
+	if resp != nil {
+		if resp.StatusCode != http.StatusNoContent && resp.StatusCode != http.StatusOK {
+			return httpRespToErrorResponse(resp, bucketName, "")
+		}
+	}
+	return nil
+}
+
+// Removes all policies on a bucket.
+func (c Client) removeBucketPolicy(ctx context.Context, bucketName string) error {
+	// Get resources properly escaped and lined up before
+	// using them in http request.
+	urlValues := make(url.Values)
+	urlValues.Set("policy", "")
+
+	// Execute DELETE on objectName.
+	resp, err := c.executeMethod(ctx, http.MethodDelete, requestMetadata{
+		bucketName:       bucketName,
+		queryValues:      urlValues,
+		contentSHA256Hex: emptySHA256Hex,
+	})
+	defer closeResponse(resp)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+// GetBucketPolicy returns the current policy
+func (c Client) GetBucketPolicy(ctx context.Context, bucketName string) (string, error) {
+	// Input validation.
+	if err := s3utils.CheckValidBucketName(bucketName); err != nil {
+		return "", err
+	}
+	bucketPolicy, err := c.getBucketPolicy(ctx, bucketName)
+	if err != nil {
+		errResponse := ToErrorResponse(err)
+		if errResponse.Code == "NoSuchBucketPolicy" {
+			return "", nil
+		}
+		return "", err
+	}
+	return bucketPolicy, nil
+}
+
+// Request server for current bucket policy.
+func (c Client) getBucketPolicy(ctx context.Context, bucketName string) (string, error) {
+	// Get resources properly escaped and lined up before
+	// using them in http request.
+	urlValues := make(url.Values)
+	urlValues.Set("policy", "")
+
+	// Execute GET on bucket to list objects.
+	resp, err := c.executeMethod(ctx, http.MethodGet, requestMetadata{
+		bucketName:       bucketName,
+		queryValues:      urlValues,
+		contentSHA256Hex: emptySHA256Hex,
+	})
+
+	defer closeResponse(resp)
+	if err != nil {
+		return "", err
+	}
+
+	if resp != nil {
+		if resp.StatusCode != http.StatusOK {
+			return "", httpRespToErrorResponse(resp, bucketName, "")
+		}
+	}
+
+	bucketPolicyBuf, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return "", err
+	}
+
+	policy := string(bucketPolicyBuf)
+	return policy, err
+}