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minio/pkg/server/api/response.go

209 lines
7.0 KiB

/*
* Minimalist Object Storage, (C) 2015 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 api
import (
"net/http"
"sort"
"github.com/minio/minio/pkg/donut"
)
// Reply date format
const (
rfcFormat = "2006-01-02T15:04:05.000Z"
)
// takes an array of Bucketmetadata information for serialization
// input:
// array of bucket metadata
//
// output:
// populated struct that can be serialized to match xml and json api spec output
func generateListBucketsResponse(buckets []donut.BucketMetadata) ListBucketsResponse {
var listbuckets []*Bucket
var data = ListBucketsResponse{}
var owner = Owner{}
owner.ID = "minio"
owner.DisplayName = "minio"
for _, bucket := range buckets {
var listbucket = &Bucket{}
listbucket.Name = bucket.Name
listbucket.CreationDate = bucket.Created.Format(rfcFormat)
listbuckets = append(listbuckets, listbucket)
}
data.Owner = owner
data.Buckets.Bucket = listbuckets
return data
}
// itemKey
type itemKey []*Object
func (b itemKey) Len() int { return len(b) }
func (b itemKey) Swap(i, j int) { b[i], b[j] = b[j], b[i] }
func (b itemKey) Less(i, j int) bool { return b[i].Key < b[j].Key }
// takes a set of objects and prepares the objects for serialization
// input:
// bucket name
// array of object metadata
// results truncated flag
//
// output:
// populated struct that can be serialized to match xml and json api spec output
func generateListObjectsResponse(bucket string, objects []donut.ObjectMetadata, bucketResources donut.BucketResourcesMetadata) ListObjectsResponse {
var contents []*Object
var prefixes []*CommonPrefix
var owner = Owner{}
var data = ListObjectsResponse{}
owner.ID = "minio"
owner.DisplayName = "minio"
for _, object := range objects {
var content = &Object{}
if object.Object == "" {
continue
}
content.Key = object.Object
content.LastModified = object.Created.Format(rfcFormat)
content.ETag = "\"" + object.MD5Sum + "\""
content.Size = object.Size
content.StorageClass = "STANDARD"
content.Owner = owner
contents = append(contents, content)
}
sort.Sort(itemKey(contents))
// TODO - support EncodingType in xml decoding
data.Name = bucket
data.Contents = contents
data.MaxKeys = bucketResources.Maxkeys
data.Prefix = bucketResources.Prefix
data.Delimiter = bucketResources.Delimiter
data.Marker = bucketResources.Marker
data.NextMarker = bucketResources.NextMarker
data.IsTruncated = bucketResources.IsTruncated
for _, prefix := range bucketResources.CommonPrefixes {
var prefixItem = &CommonPrefix{}
prefixItem.Prefix = prefix
prefixes = append(prefixes, prefixItem)
}
data.CommonPrefixes = prefixes
return data
}
// generateInitiateMultipartUploadResponse
func generateInitiateMultipartUploadResponse(bucket, key, uploadID string) InitiateMultipartUploadResponse {
return InitiateMultipartUploadResponse{
Bucket: bucket,
Key: key,
UploadID: uploadID,
}
}
// generateCompleteMultipartUploadResponse
func generateCompleteMultpartUploadResponse(bucket, key, location, etag string) CompleteMultipartUploadResponse {
return CompleteMultipartUploadResponse{
Location: location,
Bucket: bucket,
Key: key,
ETag: etag,
}
}
// generateListPartsResult
func generateListPartsResponse(objectMetadata donut.ObjectResourcesMetadata) ListPartsResponse {
// TODO - support EncodingType in xml decoding
listPartsResponse := ListPartsResponse{}
listPartsResponse.Bucket = objectMetadata.Bucket
listPartsResponse.Key = objectMetadata.Key
listPartsResponse.UploadID = objectMetadata.UploadID
listPartsResponse.StorageClass = "STANDARD"
listPartsResponse.Initiator.ID = "minio"
listPartsResponse.Initiator.DisplayName = "minio"
listPartsResponse.Owner.ID = "minio"
listPartsResponse.Owner.DisplayName = "minio"
listPartsResponse.MaxParts = objectMetadata.MaxParts
listPartsResponse.PartNumberMarker = objectMetadata.PartNumberMarker
listPartsResponse.IsTruncated = objectMetadata.IsTruncated
listPartsResponse.NextPartNumberMarker = objectMetadata.NextPartNumberMarker
listPartsResponse.Part = make([]*Part, len(objectMetadata.Part))
for _, part := range objectMetadata.Part {
newPart := &Part{}
newPart.PartNumber = part.PartNumber
newPart.ETag = "\"" + part.ETag + "\""
newPart.Size = part.Size
newPart.LastModified = part.LastModified.Format(rfcFormat)
listPartsResponse.Part = append(listPartsResponse.Part, newPart)
}
return listPartsResponse
}
// generateListMultipartUploadsResponse
func generateListMultipartUploadsResponse(bucket string, metadata donut.BucketMultipartResourcesMetadata) ListMultipartUploadsResponse {
listMultipartUploadsResponse := ListMultipartUploadsResponse{}
listMultipartUploadsResponse.Bucket = bucket
listMultipartUploadsResponse.Delimiter = metadata.Delimiter
listMultipartUploadsResponse.IsTruncated = metadata.IsTruncated
listMultipartUploadsResponse.EncodingType = metadata.EncodingType
listMultipartUploadsResponse.Prefix = metadata.Prefix
listMultipartUploadsResponse.KeyMarker = metadata.KeyMarker
listMultipartUploadsResponse.NextKeyMarker = metadata.NextKeyMarker
listMultipartUploadsResponse.MaxUploads = metadata.MaxUploads
listMultipartUploadsResponse.NextUploadIDMarker = metadata.NextUploadIDMarker
listMultipartUploadsResponse.UploadIDMarker = metadata.UploadIDMarker
listMultipartUploadsResponse.Upload = make([]*Upload, len(metadata.Upload))
for _, upload := range metadata.Upload {
newUpload := &Upload{}
newUpload.UploadID = upload.UploadID
newUpload.Key = upload.Key
newUpload.Initiated = upload.Initiated.Format(rfcFormat)
listMultipartUploadsResponse.Upload = append(listMultipartUploadsResponse.Upload, newUpload)
}
return listMultipartUploadsResponse
}
// writeSuccessResponse write success headers
func writeSuccessResponse(w http.ResponseWriter, acceptsContentType contentType) {
setCommonHeaders(w, getContentTypeString(acceptsContentType), 0)
w.WriteHeader(http.StatusOK)
}
// writeErrorRespone write error headers
func writeErrorResponse(w http.ResponseWriter, req *http.Request, errorType int, acceptsContentType contentType, resource string) {
error := getErrorCode(errorType)
// generate error response
errorResponse := getErrorResponse(error, resource)
encodedErrorResponse := encodeErrorResponse(errorResponse, acceptsContentType)
// set common headers
setCommonHeaders(w, getContentTypeString(acceptsContentType), len(encodedErrorResponse))
// write Header
w.WriteHeader(error.HTTPStatusCode)
// HEAD should have no body
if req.Method != "HEAD" {
// write error body
w.Write(encodedErrorResponse)
}
}