150 lines
3.9 KiB
Go
150 lines
3.9 KiB
Go
/*
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* Mini Object Storage, (C) 2015 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 storage
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import (
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"io"
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"regexp"
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"time"
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"unicode/utf8"
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)
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// Storage - generic API interface
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type Storage interface {
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// Bucket Operations
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ListBuckets() ([]BucketMetadata, error)
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CreateBucket(bucket string) error
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StoreBucketPolicy(bucket string, p BucketPolicy) error
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GetBucketPolicy(bucket string) (BucketPolicy, error)
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// Object Operations
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CopyObjectToWriter(w io.Writer, bucket string, object string) (int64, error)
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CopyObjectToWriterRange(w io.Writer, bucket string, object string, start, length int64) (int64, error)
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GetObjectMetadata(bucket string, object string, prefix string) (ObjectMetadata, error)
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ListObjects(bucket string, resources BucketResourcesMetadata) ([]ObjectMetadata, BucketResourcesMetadata, error)
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StoreObject(bucket string, key string, contentType string, data io.Reader) error
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}
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// BucketMetadata - name and create date
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type BucketMetadata struct {
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Name string
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Created time.Time
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}
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// ObjectMetadata - object key and its relevant metadata
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type ObjectMetadata struct {
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Bucket string
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Key string
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ContentType string
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Created time.Time
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ETag string
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Size int64
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}
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// FilterMode type
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type FilterMode int
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// FilterMode list
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const (
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DelimiterPrefixMode FilterMode = iota
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DelimiterMode
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PrefixMode
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DefaultMode
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)
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// BucketResourcesMetadata - various types of bucket resources
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type BucketResourcesMetadata struct {
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Prefix string
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Marker string
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Maxkeys int
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Delimiter string
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IsTruncated bool
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CommonPrefixes []string
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Mode FilterMode
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Policy bool
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// TODO
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Logging string
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Notification string
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}
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// GetMode - Populate filter mode
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func GetMode(resources BucketResourcesMetadata) FilterMode {
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var f FilterMode
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switch true {
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case resources.Delimiter != "" && resources.Prefix != "":
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f = DelimiterPrefixMode
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case resources.Delimiter != "" && resources.Prefix == "":
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f = DelimiterMode
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case resources.Delimiter == "" && resources.Prefix != "":
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f = PrefixMode
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case resources.Delimiter == "" && resources.Prefix == "":
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f = DefaultMode
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}
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return f
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}
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// IsDelimiterPrefixSet Delimiter and Prefix set
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func (b BucketResourcesMetadata) IsDelimiterPrefixSet() bool {
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return b.Mode == DelimiterPrefixMode
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}
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// IsDelimiterSet Delimiter set
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func (b BucketResourcesMetadata) IsDelimiterSet() bool {
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return b.Mode == DelimiterMode
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}
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// IsPrefixSet Prefix set
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func (b BucketResourcesMetadata) IsPrefixSet() bool {
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return b.Mode == PrefixMode
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}
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// IsDefault No query values
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func (b BucketResourcesMetadata) IsDefault() bool {
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return b.Mode == DefaultMode
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}
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// IsValidBucket - verify bucket name in accordance with
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// - http://docs.aws.amazon.com/AmazonS3/latest/dev/UsingBucket.html
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func IsValidBucket(bucket string) bool {
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if len(bucket) < 3 || len(bucket) > 63 {
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return false
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}
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if bucket[0] == '.' || bucket[len(bucket)-1] == '.' {
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return false
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}
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if match, _ := regexp.MatchString("\\.\\.", bucket); match == true {
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return false
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}
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// We don't support buckets with '.' in them
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match, _ := regexp.MatchString("^[a-zA-Z][a-zA-Z0-9\\-]+[a-zA-Z0-9]$", bucket)
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return match
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}
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// IsValidObject - verify object name in accordance with
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// - http://docs.aws.amazon.com/AmazonS3/latest/dev/UsingMetadata.html
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func IsValidObject(object string) bool {
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if len(object) > 1024 || len(object) == 0 {
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return false
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}
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if !utf8.ValidString(object) {
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return false
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}
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return true
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}
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