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Copy pathapi-response.go
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677 lines (586 loc) · 22.8 KB
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/*
* Minio Cloud Storage, (C) 2015, 2016, 2017, 2018 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 cmd
import (
"context"
"encoding/xml"
"net/http"
"net/url"
"path"
"strings"
"time"
"github.com/minio/minio/cmd/logger"
"github.com/minio/minio/pkg/handlers"
)
const (
timeFormatAMZLong = "2006-01-02T15:04:05.000Z" // Reply date format with nanosecond precision.
maxObjectList = 1000 // Limit number of objects in a listObjectsResponse.
maxUploadsList = 1000 // Limit number of uploads in a listUploadsResponse.
maxPartsList = 1000 // Limit number of parts in a listPartsResponse.
)
// LocationResponse - format for location response.
type LocationResponse struct {
XMLName xml.Name `xml:"http://s3.amazonaws.com/doc/2006-03-01/ LocationConstraint" json:"-"`
Location string `xml:",chardata"`
}
// ListObjectsResponse - format for list objects response.
type ListObjectsResponse struct {
XMLName xml.Name `xml:"http://s3.amazonaws.com/doc/2006-03-01/ ListBucketResult" json:"-"`
Name string
Prefix string
Marker string
// When response is truncated (the IsTruncated element value in the response
// is true), you can use the key name in this field as marker in the subsequent
// request to get next set of objects. Server lists objects in alphabetical
// order Note: This element is returned only if you have delimiter request parameter
// specified. If response does not include the NextMaker and it is truncated,
// you can use the value of the last Key in the response as the marker in the
// subsequent request to get the next set of object keys.
NextMarker string `xml:"NextMarker,omitempty"`
MaxKeys int
Delimiter string
// A flag that indicates whether or not ListObjects returned all of the results
// that satisfied the search criteria.
IsTruncated bool
Contents []Object
CommonPrefixes []CommonPrefix
// Encoding type used to encode object keys in the response.
EncodingType string `xml:"EncodingType,omitempty"`
}
// ListObjectsV2Response - format for list objects response.
type ListObjectsV2Response struct {
XMLName xml.Name `xml:"http://s3.amazonaws.com/doc/2006-03-01/ ListBucketResult" json:"-"`
Name string
Prefix string
StartAfter string `xml:"StartAfter,omitempty"`
// When response is truncated (the IsTruncated element value in the response
// is true), you can use the key name in this field as marker in the subsequent
// request to get next set of objects. Server lists objects in alphabetical
// order Note: This element is returned only if you have delimiter request parameter
// specified. If response does not include the NextMaker and it is truncated,
// you can use the value of the last Key in the response as the marker in the
// subsequent request to get the next set of object keys.
ContinuationToken string `xml:"ContinuationToken,omitempty"`
NextContinuationToken string `xml:"NextContinuationToken,omitempty"`
KeyCount int
MaxKeys int
Delimiter string
// A flag that indicates whether or not ListObjects returned all of the results
// that satisfied the search criteria.
IsTruncated bool
Contents []Object
CommonPrefixes []CommonPrefix
// Encoding type used to encode object keys in the response.
EncodingType string `xml:"EncodingType,omitempty"`
}
// Part container for part metadata.
type Part struct {
PartNumber int
LastModified string
ETag string
Size int64
}
// ListPartsResponse - format for list parts response.
type ListPartsResponse struct {
XMLName xml.Name `xml:"http://s3.amazonaws.com/doc/2006-03-01/ ListPartsResult" json:"-"`
Bucket string
Key string
UploadID string `xml:"UploadId"`
Initiator Initiator
Owner Owner
// The class of storage used to store the object.
StorageClass string
PartNumberMarker int
NextPartNumberMarker int
MaxParts int
IsTruncated bool
// List of parts.
Parts []Part `xml:"Part"`
}
// ListMultipartUploadsResponse - format for list multipart uploads response.
type ListMultipartUploadsResponse struct {
XMLName xml.Name `xml:"http://s3.amazonaws.com/doc/2006-03-01/ ListMultipartUploadsResult" json:"-"`
Bucket string
KeyMarker string
UploadIDMarker string `xml:"UploadIdMarker"`
NextKeyMarker string
NextUploadIDMarker string `xml:"NextUploadIdMarker"`
Delimiter string
Prefix string
EncodingType string `xml:"EncodingType,omitempty"`
MaxUploads int
IsTruncated bool
// List of pending uploads.
Uploads []Upload `xml:"Upload"`
// Delimed common prefixes.
CommonPrefixes []CommonPrefix
}
// ListBucketsResponse - format for list buckets response
type ListBucketsResponse struct {
XMLName xml.Name `xml:"http://s3.amazonaws.com/doc/2006-03-01/ ListAllMyBucketsResult" json:"-"`
Owner Owner
// Container for one or more buckets.
Buckets struct {
Buckets []Bucket `xml:"Bucket"`
} // Buckets are nested
}
// Upload container for in progress multipart upload
type Upload struct {
Key string
UploadID string `xml:"UploadId"`
Initiator Initiator
Owner Owner
StorageClass string
Initiated string
}
// CommonPrefix container for prefix response in ListObjectsResponse
type CommonPrefix struct {
Prefix string
}
// Bucket container for bucket metadata
type Bucket struct {
Name string
CreationDate string // time string of format "2006-01-02T15:04:05.000Z"
}
// Object container for object metadata
type Object struct {
Key string
LastModified string // time string of format "2006-01-02T15:04:05.000Z"
ETag string
Size int64
// Owner of the object.
Owner Owner
// The class of storage used to store the object.
StorageClass string
}
// CopyObjectResponse container returns ETag and LastModified of the successfully copied object
type CopyObjectResponse struct {
XMLName xml.Name `xml:"http://s3.amazonaws.com/doc/2006-03-01/ CopyObjectResult" json:"-"`
LastModified string // time string of format "2006-01-02T15:04:05.000Z"
ETag string // md5sum of the copied object.
}
// CopyObjectPartResponse container returns ETag and LastModified of the successfully copied object
type CopyObjectPartResponse struct {
XMLName xml.Name `xml:"http://s3.amazonaws.com/doc/2006-03-01/ CopyPartResult" json:"-"`
LastModified string // time string of format "2006-01-02T15:04:05.000Z"
ETag string // md5sum of the copied object part.
}
// Initiator inherit from Owner struct, fields are same
type Initiator Owner
// Owner - bucket owner/principal
type Owner struct {
ID string
DisplayName string
}
// InitiateMultipartUploadResponse container for InitiateMultiPartUpload response, provides uploadID to start MultiPart upload
type InitiateMultipartUploadResponse struct {
XMLName xml.Name `xml:"http://s3.amazonaws.com/doc/2006-03-01/ InitiateMultipartUploadResult" json:"-"`
Bucket string
Key string
UploadID string `xml:"UploadId"`
}
// CompleteMultipartUploadResponse container for completed multipart upload response
type CompleteMultipartUploadResponse struct {
XMLName xml.Name `xml:"http://s3.amazonaws.com/doc/2006-03-01/ CompleteMultipartUploadResult" json:"-"`
Location string
Bucket string
Key string
ETag string
}
// DeleteError structure.
type DeleteError struct {
Code string
Message string
Key string
}
// DeleteObjectsResponse container for multiple object deletes.
type DeleteObjectsResponse struct {
XMLName xml.Name `xml:"http://s3.amazonaws.com/doc/2006-03-01/ DeleteResult" json:"-"`
// Collection of all deleted objects
DeletedObjects []ObjectIdentifier `xml:"Deleted,omitempty"`
// Collection of errors deleting certain objects.
Errors []DeleteError `xml:"Error,omitempty"`
}
// PostResponse container for POST object request when success_action_status is set to 201
type PostResponse struct {
Bucket string
Key string
ETag string
Location string
}
// returns "https" if the tls boolean is true, "http" otherwise.
func getURLScheme(tls bool) string {
if tls {
return httpsScheme
}
return httpScheme
}
// getObjectLocation gets the fully qualified URL of an object.
func getObjectLocation(r *http.Request, domains []string, bucket, object string) string {
// unit tests do not have host set.
if r.Host == "" {
return path.Clean(r.URL.Path)
}
proto := handlers.GetSourceScheme(r)
if proto == "" {
proto = getURLScheme(globalIsSSL)
}
u := &url.URL{
Host: r.Host,
Path: path.Join(slashSeparator, bucket, object),
Scheme: proto,
}
// If domain is set then we need to use bucket DNS style.
for _, domain := range domains {
if strings.Contains(r.Host, domain) {
u.Host = bucket + "." + r.Host
u.Path = path.Join(slashSeparator, object)
break
}
}
return u.String()
}
// s3EncodeName encodes string in response when encodingType
// is specified in AWS S3 requests.
func s3EncodeName(name string, encodingType string) (result string) {
// Quick path to exit
if encodingType == "" {
return name
}
encodingType = strings.ToLower(encodingType)
switch encodingType {
case "url":
return url.QueryEscape(name)
}
return name
}
// generates ListBucketsResponse from array of BucketInfo which can be
// serialized to match XML and JSON API spec output.
func generateListBucketsResponse(buckets []BucketInfo) ListBucketsResponse {
var listbuckets []Bucket
var data = ListBucketsResponse{}
var owner = Owner{}
owner.ID = globalMinioDefaultOwnerID
for _, bucket := range buckets {
var listbucket = Bucket{}
listbucket.Name = bucket.Name
listbucket.CreationDate = bucket.Created.UTC().Format(timeFormatAMZLong)
listbuckets = append(listbuckets, listbucket)
}
data.Owner = owner
data.Buckets.Buckets = listbuckets
return data
}
// generates an ListObjectsV1 response for the said bucket with other enumerated options.
func generateListObjectsV1Response(bucket, prefix, marker, delimiter, encodingType string, maxKeys int, resp ListObjectsInfo) ListObjectsResponse {
var contents []Object
var prefixes []CommonPrefix
var owner = Owner{}
var data = ListObjectsResponse{}
owner.ID = globalMinioDefaultOwnerID
for _, object := range resp.Objects {
var content = Object{}
if object.Name == "" {
continue
}
content.Key = s3EncodeName(object.Name, encodingType)
content.LastModified = object.ModTime.UTC().Format(timeFormatAMZLong)
if object.ETag != "" {
content.ETag = "\"" + object.ETag + "\""
}
content.Size = object.Size
content.StorageClass = object.StorageClass
content.Owner = owner
contents = append(contents, content)
}
data.Name = bucket
data.Contents = contents
data.EncodingType = encodingType
data.Prefix = s3EncodeName(prefix, encodingType)
data.Marker = s3EncodeName(marker, encodingType)
data.Delimiter = s3EncodeName(delimiter, encodingType)
data.MaxKeys = maxKeys
data.NextMarker = s3EncodeName(resp.NextMarker, encodingType)
data.IsTruncated = resp.IsTruncated
for _, prefix := range resp.Prefixes {
var prefixItem = CommonPrefix{}
prefixItem.Prefix = s3EncodeName(prefix, encodingType)
prefixes = append(prefixes, prefixItem)
}
data.CommonPrefixes = prefixes
return data
}
// generates an ListObjectsV2 response for the said bucket with other enumerated options.
func generateListObjectsV2Response(bucket, prefix, token, nextToken, startAfter, delimiter, encodingType string, fetchOwner, isTruncated bool, maxKeys int, objects []ObjectInfo, prefixes []string) ListObjectsV2Response {
var contents []Object
var commonPrefixes []CommonPrefix
var owner = Owner{}
var data = ListObjectsV2Response{}
if fetchOwner {
owner.ID = globalMinioDefaultOwnerID
}
for _, object := range objects {
var content = Object{}
if object.Name == "" {
continue
}
content.Key = s3EncodeName(object.Name, encodingType)
content.LastModified = object.ModTime.UTC().Format(timeFormatAMZLong)
if object.ETag != "" {
content.ETag = "\"" + object.ETag + "\""
}
content.Size = object.Size
content.StorageClass = object.StorageClass
content.Owner = owner
contents = append(contents, content)
}
data.Name = bucket
data.Contents = contents
data.EncodingType = encodingType
data.StartAfter = s3EncodeName(startAfter, encodingType)
data.Delimiter = s3EncodeName(delimiter, encodingType)
data.Prefix = s3EncodeName(prefix, encodingType)
data.MaxKeys = maxKeys
data.ContinuationToken = token
data.NextContinuationToken = nextToken
data.IsTruncated = isTruncated
for _, prefix := range prefixes {
var prefixItem = CommonPrefix{}
prefixItem.Prefix = s3EncodeName(prefix, encodingType)
commonPrefixes = append(commonPrefixes, prefixItem)
}
data.CommonPrefixes = commonPrefixes
data.KeyCount = len(data.Contents) + len(data.CommonPrefixes)
return data
}
// generates CopyObjectResponse from etag and lastModified time.
func generateCopyObjectResponse(etag string, lastModified time.Time) CopyObjectResponse {
return CopyObjectResponse{
ETag: "\"" + etag + "\"",
LastModified: lastModified.UTC().Format(timeFormatAMZLong),
}
}
// generates CopyObjectPartResponse from etag and lastModified time.
func generateCopyObjectPartResponse(etag string, lastModified time.Time) CopyObjectPartResponse {
return CopyObjectPartResponse{
ETag: "\"" + etag + "\"",
LastModified: lastModified.UTC().Format(timeFormatAMZLong),
}
}
// generates InitiateMultipartUploadResponse for given bucket, key and uploadID.
func generateInitiateMultipartUploadResponse(bucket, key, uploadID string) InitiateMultipartUploadResponse {
return InitiateMultipartUploadResponse{
Bucket: bucket,
Key: key,
UploadID: uploadID,
}
}
// generates CompleteMultipartUploadResponse for given bucket, key, location and ETag.
func generateCompleteMultpartUploadResponse(bucket, key, location, etag string) CompleteMultipartUploadResponse {
return CompleteMultipartUploadResponse{
Location: location,
Bucket: bucket,
Key: key,
ETag: etag,
}
}
// generates ListPartsResponse from ListPartsInfo.
func generateListPartsResponse(partsInfo ListPartsInfo, encodingType string) ListPartsResponse {
listPartsResponse := ListPartsResponse{}
listPartsResponse.Bucket = partsInfo.Bucket
listPartsResponse.Key = s3EncodeName(partsInfo.Object, encodingType)
listPartsResponse.UploadID = partsInfo.UploadID
listPartsResponse.StorageClass = globalMinioDefaultStorageClass
listPartsResponse.Initiator.ID = globalMinioDefaultOwnerID
listPartsResponse.Owner.ID = globalMinioDefaultOwnerID
listPartsResponse.MaxParts = partsInfo.MaxParts
listPartsResponse.PartNumberMarker = partsInfo.PartNumberMarker
listPartsResponse.IsTruncated = partsInfo.IsTruncated
listPartsResponse.NextPartNumberMarker = partsInfo.NextPartNumberMarker
listPartsResponse.Parts = make([]Part, len(partsInfo.Parts))
for index, part := range partsInfo.Parts {
newPart := Part{}
newPart.PartNumber = part.PartNumber
newPart.ETag = "\"" + part.ETag + "\""
newPart.Size = part.Size
newPart.LastModified = part.LastModified.UTC().Format(timeFormatAMZLong)
listPartsResponse.Parts[index] = newPart
}
return listPartsResponse
}
// generates ListMultipartUploadsResponse for given bucket and ListMultipartsInfo.
func generateListMultipartUploadsResponse(bucket string, multipartsInfo ListMultipartsInfo, encodingType string) ListMultipartUploadsResponse {
listMultipartUploadsResponse := ListMultipartUploadsResponse{}
listMultipartUploadsResponse.Bucket = bucket
listMultipartUploadsResponse.Delimiter = s3EncodeName(multipartsInfo.Delimiter, encodingType)
listMultipartUploadsResponse.IsTruncated = multipartsInfo.IsTruncated
listMultipartUploadsResponse.EncodingType = encodingType
listMultipartUploadsResponse.Prefix = s3EncodeName(multipartsInfo.Prefix, encodingType)
listMultipartUploadsResponse.KeyMarker = s3EncodeName(multipartsInfo.KeyMarker, encodingType)
listMultipartUploadsResponse.NextKeyMarker = s3EncodeName(multipartsInfo.NextKeyMarker, encodingType)
listMultipartUploadsResponse.MaxUploads = multipartsInfo.MaxUploads
listMultipartUploadsResponse.NextUploadIDMarker = multipartsInfo.NextUploadIDMarker
listMultipartUploadsResponse.UploadIDMarker = multipartsInfo.UploadIDMarker
listMultipartUploadsResponse.CommonPrefixes = make([]CommonPrefix, len(multipartsInfo.CommonPrefixes))
for index, commonPrefix := range multipartsInfo.CommonPrefixes {
listMultipartUploadsResponse.CommonPrefixes[index] = CommonPrefix{
Prefix: s3EncodeName(commonPrefix, encodingType),
}
}
listMultipartUploadsResponse.Uploads = make([]Upload, len(multipartsInfo.Uploads))
for index, upload := range multipartsInfo.Uploads {
newUpload := Upload{}
newUpload.UploadID = upload.UploadID
newUpload.Key = s3EncodeName(upload.Object, encodingType)
newUpload.Initiated = upload.Initiated.UTC().Format(timeFormatAMZLong)
listMultipartUploadsResponse.Uploads[index] = newUpload
}
return listMultipartUploadsResponse
}
// generate multi objects delete response.
func generateMultiDeleteResponse(quiet bool, deletedObjects []ObjectIdentifier, errs []DeleteError) DeleteObjectsResponse {
deleteResp := DeleteObjectsResponse{}
if !quiet {
deleteResp.DeletedObjects = deletedObjects
}
deleteResp.Errors = errs
return deleteResp
}
func writeResponse(w http.ResponseWriter, statusCode int, response []byte, mType mimeType) {
setCommonHeaders(w)
if mType != mimeNone {
w.Header().Set("Content-Type", string(mType))
}
w.WriteHeader(statusCode)
if response != nil {
w.Write(response)
w.(http.Flusher).Flush()
}
}
// mimeType represents various MIME type used API responses.
type mimeType string
const (
// Means no response type.
mimeNone mimeType = ""
// Means response type is JSON.
mimeJSON mimeType = "application/json"
// Means response type is XML.
mimeXML mimeType = "application/xml"
)
// writeSuccessResponseJSON writes success headers and response if any,
// with content-type set to `application/json`.
func writeSuccessResponseJSON(w http.ResponseWriter, response []byte) {
writeResponse(w, http.StatusOK, response, mimeJSON)
}
// writeSuccessResponseXML writes success headers and response if any,
// with content-type set to `application/xml`.
func writeSuccessResponseXML(w http.ResponseWriter, response []byte) {
writeResponse(w, http.StatusOK, response, mimeXML)
}
// writeSuccessNoContent writes success headers with http status 204
func writeSuccessNoContent(w http.ResponseWriter) {
writeResponse(w, http.StatusNoContent, nil, mimeNone)
}
// writeRedirectSeeOther writes Location header with http status 303
func writeRedirectSeeOther(w http.ResponseWriter, location string) {
w.Header().Set("Location", location)
writeResponse(w, http.StatusSeeOther, nil, mimeNone)
}
func writeSuccessResponseHeadersOnly(w http.ResponseWriter) {
writeResponse(w, http.StatusOK, nil, mimeNone)
}
// writeErrorRespone writes error headers
func writeErrorResponse(ctx context.Context, w http.ResponseWriter, err APIError, reqURL *url.URL, browser bool) {
switch err.Code {
case "SlowDown", "XMinioServerNotInitialized", "XMinioReadQuorum", "XMinioWriteQuorum":
// Set retry-after header to indicate user-agents to retry request after 120secs.
// https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Retry-After
w.Header().Set("Retry-After", "120")
case "AccessDenied":
// The request is from browser and also if browser
// is enabled we need to redirect.
if browser && globalIsBrowserEnabled {
w.Header().Set("Location", minioReservedBucketPath+reqURL.Path)
w.WriteHeader(http.StatusTemporaryRedirect)
return
}
}
// Generate error response.
errorResponse := getAPIErrorResponse(ctx, err, reqURL.Path,
w.Header().Get(responseRequestIDKey), w.Header().Get(responseDeploymentIDKey))
encodedErrorResponse := encodeResponse(errorResponse)
writeResponse(w, err.HTTPStatusCode, encodedErrorResponse, mimeXML)
}
func writeErrorResponseHeadersOnly(w http.ResponseWriter, err APIError) {
writeResponse(w, err.HTTPStatusCode, nil, mimeNone)
}
// writeErrorResponseJSON - writes error response in JSON format;
// useful for admin APIs.
func writeErrorResponseJSON(ctx context.Context, w http.ResponseWriter, err APIError, reqURL *url.URL) {
// Generate error response.
errorResponse := getAPIErrorResponse(ctx, err, reqURL.Path, w.Header().Get(responseRequestIDKey), w.Header().Get(responseDeploymentIDKey))
encodedErrorResponse := encodeResponseJSON(errorResponse)
writeResponse(w, err.HTTPStatusCode, encodedErrorResponse, mimeJSON)
}
// writeCustomErrorResponseJSON - similar to writeErrorResponseJSON,
// but accepts the error message directly (this allows messages to be
// dynamically generated.)
func writeCustomErrorResponseJSON(ctx context.Context, w http.ResponseWriter, err APIError,
errBody string, reqURL *url.URL) {
reqInfo := logger.GetReqInfo(ctx)
errorResponse := APIErrorResponse{
Code: err.Code,
Message: errBody,
Resource: reqURL.Path,
BucketName: reqInfo.BucketName,
Key: reqInfo.ObjectName,
RequestID: w.Header().Get(responseRequestIDKey),
HostID: w.Header().Get(responseDeploymentIDKey),
}
encodedErrorResponse := encodeResponseJSON(errorResponse)
writeResponse(w, err.HTTPStatusCode, encodedErrorResponse, mimeJSON)
}
// writeCustomErrorResponseXML - similar to writeErrorResponse,
// but accepts the error message directly (this allows messages to be
// dynamically generated.)
func writeCustomErrorResponseXML(ctx context.Context, w http.ResponseWriter, err APIError, errBody string, reqURL *url.URL, browser bool) {
switch err.Code {
case "SlowDown", "XMinioServerNotInitialized", "XMinioReadQuorum", "XMinioWriteQuorum":
// Set retry-after header to indicate user-agents to retry request after 120secs.
// https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Retry-After
w.Header().Set("Retry-After", "120")
case "AccessDenied":
// The request is from browser and also if browser
// is enabled we need to redirect.
if browser && globalIsBrowserEnabled {
w.Header().Set("Location", minioReservedBucketPath+reqURL.Path)
w.WriteHeader(http.StatusTemporaryRedirect)
return
}
}
reqInfo := logger.GetReqInfo(ctx)
errorResponse := APIErrorResponse{
Code: err.Code,
Message: errBody,
Resource: reqURL.Path,
BucketName: reqInfo.BucketName,
Key: reqInfo.ObjectName,
RequestID: w.Header().Get(responseRequestIDKey),
HostID: w.Header().Get(responseDeploymentIDKey),
}
encodedErrorResponse := encodeResponse(errorResponse)
writeResponse(w, err.HTTPStatusCode, encodedErrorResponse, mimeXML)
}