/
object-handlers.go
2567 lines (2248 loc) · 86.2 KB
/
object-handlers.go
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/*
* MinIO Cloud Storage, (C) 2015-2018 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"
"crypto/hmac"
"encoding/binary"
"encoding/hex"
"encoding/xml"
"io"
goioutil "io/ioutil"
"net/http"
"net/url"
"sort"
"strconv"
"strings"
"time"
"github.com/gorilla/mux"
miniogo "github.com/minio/minio-go/v6"
"github.com/minio/minio-go/v6/pkg/encrypt"
"github.com/minio/minio/cmd/config/storageclass"
"github.com/minio/minio/cmd/crypto"
xhttp "github.com/minio/minio/cmd/http"
"github.com/minio/minio/cmd/logger"
"github.com/minio/minio/pkg/dns"
"github.com/minio/minio/pkg/event"
"github.com/minio/minio/pkg/handlers"
"github.com/minio/minio/pkg/hash"
"github.com/minio/minio/pkg/ioutil"
"github.com/minio/minio/pkg/policy"
"github.com/minio/minio/pkg/s3select"
sha256 "github.com/minio/sha256-simd"
"github.com/minio/sio"
)
// supportedHeadGetReqParams - supported request parameters for GET and HEAD presigned request.
var supportedHeadGetReqParams = map[string]string{
"response-expires": xhttp.Expires,
"response-content-type": xhttp.ContentType,
"response-cache-control": xhttp.CacheControl,
"response-content-encoding": xhttp.ContentEncoding,
"response-content-language": xhttp.ContentLanguage,
"response-content-disposition": xhttp.ContentDisposition,
}
const (
compressionAlgorithmV1 = "golang/snappy/LZ77"
compressionAlgorithmV2 = "klauspost/compress/s2"
)
// setHeadGetRespHeaders - set any requested parameters as response headers.
func setHeadGetRespHeaders(w http.ResponseWriter, reqParams url.Values) {
for k, v := range reqParams {
if header, ok := supportedHeadGetReqParams[k]; ok {
w.Header()[header] = v
}
}
}
// SelectObjectContentHandler - GET Object?select
// ----------
// This implementation of the GET operation retrieves object content based
// on an SQL expression. In the request, along with the sql expression, you must
// also specify a data serialization format (JSON, CSV) of the object.
func (api objectAPIHandlers) SelectObjectContentHandler(w http.ResponseWriter, r *http.Request) {
ctx := newContext(r, w, "SelectObject")
defer logger.AuditLog(w, r, "SelectObject", mustGetClaimsFromToken(r))
// Fetch object stat info.
objectAPI := api.ObjectAPI()
if objectAPI == nil {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrServerNotInitialized), r.URL, guessIsBrowserReq(r))
return
}
if crypto.S3KMS.IsRequested(r.Header) { // SSE-KMS is not supported
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrNotImplemented), r.URL, guessIsBrowserReq(r))
return
}
if !api.EncryptionEnabled() && crypto.IsRequested(r.Header) {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrBadRequest), r.URL, guessIsBrowserReq(r))
return
}
vars := mux.Vars(r)
bucket := vars["bucket"]
object := vars["object"]
// get gateway encryption options
opts, err := getOpts(ctx, r, bucket, object)
if err != nil {
writeErrorResponseHeadersOnly(w, toAPIError(ctx, err))
return
}
getObjectInfo := objectAPI.GetObjectInfo
if api.CacheAPI() != nil {
getObjectInfo = api.CacheAPI().GetObjectInfo
}
// Check for auth type to return S3 compatible error.
// type to return the correct error (NoSuchKey vs AccessDenied)
if s3Error := checkRequestAuthType(ctx, r, policy.GetObjectAction, bucket, object); s3Error != ErrNone {
if getRequestAuthType(r) == authTypeAnonymous {
// As per "Permission" section in
// https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectGET.html
// If the object you request does not exist,
// the error Amazon S3 returns depends on
// whether you also have the s3:ListBucket
// permission.
// * If you have the s3:ListBucket permission
// on the bucket, Amazon S3 will return an
// HTTP status code 404 ("no such key")
// error.
// * if you don’t have the s3:ListBucket
// permission, Amazon S3 will return an HTTP
// status code 403 ("access denied") error.`
if globalPolicySys.IsAllowed(policy.Args{
Action: policy.ListBucketAction,
BucketName: bucket,
ConditionValues: getConditionValues(r, "", "", nil),
IsOwner: false,
}) {
_, err = getObjectInfo(ctx, bucket, object, opts)
if toAPIError(ctx, err).Code == "NoSuchKey" {
s3Error = ErrNoSuchKey
}
}
}
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL, guessIsBrowserReq(r))
return
}
// Get request range.
rangeHeader := r.Header.Get("Range")
if rangeHeader != "" {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrUnsupportedRangeHeader), r.URL, guessIsBrowserReq(r))
return
}
if r.ContentLength <= 0 {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrEmptyRequestBody), r.URL, guessIsBrowserReq(r))
return
}
s3Select, err := s3select.NewS3Select(r.Body)
if err != nil {
if serr, ok := err.(s3select.SelectError); ok {
encodedErrorResponse := encodeResponse(APIErrorResponse{
Code: serr.ErrorCode(),
Message: serr.ErrorMessage(),
BucketName: bucket,
Key: object,
Resource: r.URL.Path,
RequestID: w.Header().Get(xhttp.AmzRequestID),
HostID: globalDeploymentID,
})
writeResponse(w, serr.HTTPStatusCode(), encodedErrorResponse, mimeXML)
} else {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
}
return
}
getObjectNInfo := objectAPI.GetObjectNInfo
if api.CacheAPI() != nil {
getObjectNInfo = api.CacheAPI().GetObjectNInfo
}
getObject := func(offset, length int64) (rc io.ReadCloser, err error) {
isSuffixLength := false
if offset < 0 {
isSuffixLength = true
}
rs := &HTTPRangeSpec{
IsSuffixLength: isSuffixLength,
Start: offset,
End: offset + length,
}
return getObjectNInfo(ctx, bucket, object, rs, r.Header, readLock, ObjectOptions{})
}
objInfo, err := getObjectInfo(ctx, bucket, object, opts)
if err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
return
}
if err = s3Select.Open(getObject); err != nil {
if serr, ok := err.(s3select.SelectError); ok {
encodedErrorResponse := encodeResponse(APIErrorResponse{
Code: serr.ErrorCode(),
Message: serr.ErrorMessage(),
BucketName: bucket,
Key: object,
Resource: r.URL.Path,
RequestID: w.Header().Get(xhttp.AmzRequestID),
HostID: globalDeploymentID,
})
writeResponse(w, serr.HTTPStatusCode(), encodedErrorResponse, mimeXML)
} else {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
}
return
}
s3Select.Evaluate(w)
s3Select.Close()
// Notify object accessed via a GET request.
sendEvent(eventArgs{
EventName: event.ObjectAccessedGet,
BucketName: bucket,
Object: objInfo,
ReqParams: extractReqParams(r),
RespElements: extractRespElements(w),
UserAgent: r.UserAgent(),
Host: handlers.GetSourceIP(r),
})
}
// GetObjectHandler - GET Object
// ----------
// This implementation of the GET operation retrieves object. To use GET,
// you must have READ access to the object.
func (api objectAPIHandlers) GetObjectHandler(w http.ResponseWriter, r *http.Request) {
ctx := newContext(r, w, "GetObject")
defer logger.AuditLog(w, r, "GetObject", mustGetClaimsFromToken(r))
objectAPI := api.ObjectAPI()
if objectAPI == nil {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrServerNotInitialized), r.URL, guessIsBrowserReq(r))
return
}
if crypto.S3.IsRequested(r.Header) || crypto.S3KMS.IsRequested(r.Header) { // If SSE-S3 or SSE-KMS present -> AWS fails with undefined error
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrBadRequest), r.URL, guessIsBrowserReq(r))
return
}
if !api.EncryptionEnabled() && crypto.IsRequested(r.Header) {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrBadRequest), r.URL, guessIsBrowserReq(r))
return
}
vars := mux.Vars(r)
bucket := vars["bucket"]
object := vars["object"]
if vid := r.URL.Query().Get("versionId"); vid != "" && vid != "null" {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrNoSuchVersion), r.URL, guessIsBrowserReq(r))
return
}
// get gateway encryption options
opts, err := getOpts(ctx, r, bucket, object)
if err != nil {
writeErrorResponseHeadersOnly(w, toAPIError(ctx, err))
return
}
// Check for auth type to return S3 compatible error.
// type to return the correct error (NoSuchKey vs AccessDenied)
if s3Error := checkRequestAuthType(ctx, r, policy.GetObjectAction, bucket, object); s3Error != ErrNone {
if getRequestAuthType(r) == authTypeAnonymous {
// As per "Permission" section in
// https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectGET.html
// If the object you request does not exist,
// the error Amazon S3 returns depends on
// whether you also have the s3:ListBucket
// permission.
// * If you have the s3:ListBucket permission
// on the bucket, Amazon S3 will return an
// HTTP status code 404 ("no such key")
// error.
// * if you don’t have the s3:ListBucket
// permission, Amazon S3 will return an HTTP
// status code 403 ("access denied") error.`
if globalPolicySys.IsAllowed(policy.Args{
Action: policy.ListBucketAction,
BucketName: bucket,
ConditionValues: getConditionValues(r, "", "", nil),
IsOwner: false,
}) {
getObjectInfo := objectAPI.GetObjectInfo
if api.CacheAPI() != nil {
getObjectInfo = api.CacheAPI().GetObjectInfo
}
_, err = getObjectInfo(ctx, bucket, object, opts)
if toAPIError(ctx, err).Code == "NoSuchKey" {
s3Error = ErrNoSuchKey
}
}
}
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL, guessIsBrowserReq(r))
return
}
getObjectNInfo := objectAPI.GetObjectNInfo
if api.CacheAPI() != nil {
getObjectNInfo = api.CacheAPI().GetObjectNInfo
}
// Get request range.
var rs *HTTPRangeSpec
rangeHeader := r.Header.Get("Range")
if rangeHeader != "" {
if rs, err = parseRequestRangeSpec(rangeHeader); err != nil {
// Handle only errInvalidRange. Ignore other
// parse error and treat it as regular Get
// request like Amazon S3.
if err == errInvalidRange {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidRange), r.URL, guessIsBrowserReq(r))
return
}
logger.LogIf(ctx, err, logger.Application)
}
}
gr, err := getObjectNInfo(ctx, bucket, object, rs, r.Header, readLock, opts)
if err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
return
}
defer gr.Close()
objInfo := gr.ObjInfo
if objectAPI.IsEncryptionSupported() {
objInfo.UserDefined = CleanMinioInternalMetadataKeys(objInfo.UserDefined)
if _, err = DecryptObjectInfo(&objInfo, r.Header); err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
return
}
}
// Validate pre-conditions if any.
if checkPreconditions(ctx, w, r, objInfo) {
return
}
// Set encryption response headers
if objectAPI.IsEncryptionSupported() {
if crypto.IsEncrypted(objInfo.UserDefined) {
switch {
case crypto.S3.IsEncrypted(objInfo.UserDefined):
w.Header().Set(crypto.SSEHeader, crypto.SSEAlgorithmAES256)
case crypto.SSEC.IsEncrypted(objInfo.UserDefined):
w.Header().Set(crypto.SSECAlgorithm, r.Header.Get(crypto.SSECAlgorithm))
w.Header().Set(crypto.SSECKeyMD5, r.Header.Get(crypto.SSECKeyMD5))
}
}
}
if err = setObjectHeaders(w, objInfo, rs); err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
return
}
setHeadGetRespHeaders(w, r.URL.Query())
statusCodeWritten := false
httpWriter := ioutil.WriteOnClose(w)
if rs != nil {
statusCodeWritten = true
w.WriteHeader(http.StatusPartialContent)
}
// Write object content to response body
if _, err = io.Copy(httpWriter, gr); err != nil {
if !httpWriter.HasWritten() && !statusCodeWritten { // write error response only if no data or headers has been written to client yet
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
}
return
}
if err = httpWriter.Close(); err != nil {
if !httpWriter.HasWritten() && !statusCodeWritten { // write error response only if no data or headers has been written to client yet
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
return
}
}
// Notify object accessed via a GET request.
sendEvent(eventArgs{
EventName: event.ObjectAccessedGet,
BucketName: bucket,
Object: objInfo,
ReqParams: extractReqParams(r),
RespElements: extractRespElements(w),
UserAgent: r.UserAgent(),
Host: handlers.GetSourceIP(r),
})
}
// HeadObjectHandler - HEAD Object
// -----------
// The HEAD operation retrieves metadata from an object without returning the object itself.
func (api objectAPIHandlers) HeadObjectHandler(w http.ResponseWriter, r *http.Request) {
ctx := newContext(r, w, "HeadObject")
defer logger.AuditLog(w, r, "HeadObject", mustGetClaimsFromToken(r))
objectAPI := api.ObjectAPI()
if objectAPI == nil {
writeErrorResponseHeadersOnly(w, errorCodes.ToAPIErr(ErrServerNotInitialized))
return
}
if crypto.S3.IsRequested(r.Header) || crypto.S3KMS.IsRequested(r.Header) { // If SSE-S3 or SSE-KMS present -> AWS fails with undefined error
writeErrorResponseHeadersOnly(w, errorCodes.ToAPIErr(ErrBadRequest))
return
}
if !api.EncryptionEnabled() && crypto.IsRequested(r.Header) {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrBadRequest), r.URL, guessIsBrowserReq(r))
return
}
vars := mux.Vars(r)
bucket := vars["bucket"]
object := vars["object"]
if vid := r.URL.Query().Get("versionId"); vid != "" && vid != "null" {
writeErrorResponseHeadersOnly(w, errorCodes.ToAPIErr(ErrNoSuchVersion))
return
}
getObjectInfo := objectAPI.GetObjectInfo
if api.CacheAPI() != nil {
getObjectInfo = api.CacheAPI().GetObjectInfo
}
opts, err := getOpts(ctx, r, bucket, object)
if err != nil {
writeErrorResponseHeadersOnly(w, toAPIError(ctx, err))
return
}
if s3Error := checkRequestAuthType(ctx, r, policy.GetObjectAction, bucket, object); s3Error != ErrNone {
if getRequestAuthType(r) == authTypeAnonymous {
// As per "Permission" section in
// https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectHEAD.html
// If the object you request does not exist,
// the error Amazon S3 returns depends on
// whether you also have the s3:ListBucket
// permission.
// * If you have the s3:ListBucket permission
// on the bucket, Amazon S3 will return an
// HTTP status code 404 ("no such key")
// error.
// * if you don’t have the s3:ListBucket
// permission, Amazon S3 will return an HTTP
// status code 403 ("access denied") error.`
if globalPolicySys.IsAllowed(policy.Args{
Action: policy.ListBucketAction,
BucketName: bucket,
ConditionValues: getConditionValues(r, "", "", nil),
IsOwner: false,
}) {
_, err = getObjectInfo(ctx, bucket, object, opts)
if toAPIError(ctx, err).Code == "NoSuchKey" {
s3Error = ErrNoSuchKey
}
}
}
writeErrorResponseHeadersOnly(w, errorCodes.ToAPIErr(s3Error))
return
}
// Get request range.
var rs *HTTPRangeSpec
rangeHeader := r.Header.Get("Range")
if rangeHeader != "" {
if rs, err = parseRequestRangeSpec(rangeHeader); err != nil {
// Handle only errInvalidRange. Ignore other
// parse error and treat it as regular Get
// request like Amazon S3.
if err == errInvalidRange {
writeErrorResponseHeadersOnly(w, errorCodes.ToAPIErr(ErrInvalidRange))
return
}
logger.LogIf(ctx, err)
}
}
objInfo, err := getObjectInfo(ctx, bucket, object, opts)
if err != nil {
writeErrorResponseHeadersOnly(w, toAPIError(ctx, err))
return
}
if objectAPI.IsEncryptionSupported() {
if _, err = DecryptObjectInfo(&objInfo, r.Header); err != nil {
writeErrorResponseHeadersOnly(w, toAPIError(ctx, err))
return
}
objInfo.UserDefined = CleanMinioInternalMetadataKeys(objInfo.UserDefined)
}
// Set encryption response headers
if objectAPI.IsEncryptionSupported() {
if crypto.IsEncrypted(objInfo.UserDefined) {
switch {
case crypto.S3.IsEncrypted(objInfo.UserDefined):
w.Header().Set(crypto.SSEHeader, crypto.SSEAlgorithmAES256)
case crypto.SSEC.IsEncrypted(objInfo.UserDefined):
// Validate the SSE-C Key set in the header.
if _, err = crypto.SSEC.UnsealObjectKey(r.Header, objInfo.UserDefined, bucket, object); err != nil {
writeErrorResponseHeadersOnly(w, toAPIError(ctx, err))
return
}
w.Header().Set(crypto.SSECAlgorithm, r.Header.Get(crypto.SSECAlgorithm))
w.Header().Set(crypto.SSECKeyMD5, r.Header.Get(crypto.SSECKeyMD5))
}
}
}
// Validate pre-conditions if any.
if checkPreconditions(ctx, w, r, objInfo) {
return
}
// Set standard object headers.
if err = setObjectHeaders(w, objInfo, rs); err != nil {
writeErrorResponseHeadersOnly(w, toAPIError(ctx, err))
return
}
// Set any additional requested response headers.
setHeadGetRespHeaders(w, r.URL.Query())
// Successful response.
if rs != nil {
w.WriteHeader(http.StatusPartialContent)
} else {
w.WriteHeader(http.StatusOK)
}
// Notify object accessed via a HEAD request.
sendEvent(eventArgs{
EventName: event.ObjectAccessedHead,
BucketName: bucket,
Object: objInfo,
ReqParams: extractReqParams(r),
RespElements: extractRespElements(w),
UserAgent: r.UserAgent(),
Host: handlers.GetSourceIP(r),
})
}
// Extract metadata relevant for an CopyObject operation based on conditional
// header values specified in X-Amz-Metadata-Directive.
func getCpObjMetadataFromHeader(ctx context.Context, r *http.Request, userMeta map[string]string) (map[string]string, error) {
// Make a copy of the supplied metadata to avoid
// to change the original one.
defaultMeta := make(map[string]string, len(userMeta))
for k, v := range userMeta {
defaultMeta[k] = v
}
// remove SSE Headers from source info
crypto.RemoveSSEHeaders(defaultMeta)
// if x-amz-metadata-directive says REPLACE then
// we extract metadata from the input headers.
if isMetadataReplace(r.Header) {
return extractMetadata(ctx, r)
}
// if x-amz-metadata-directive says COPY then we
// return the default metadata.
if isMetadataCopy(r.Header) {
return defaultMeta, nil
}
// Copy is default behavior if not x-amz-metadata-directive is set.
return defaultMeta, nil
}
// Returns a minio-go Client configured to access remote host described by destDNSRecord
// Applicable only in a federated deployment
var getRemoteInstanceClient = func(r *http.Request, host string) (*miniogo.Core, error) {
cred := getReqAccessCred(r, globalServerRegion)
// In a federated deployment, all the instances share config files
// and hence expected to have same credentials.
core, err := miniogo.NewCore(host, cred.AccessKey, cred.SecretKey, globalIsSSL)
if err != nil {
return nil, err
}
core.SetCustomTransport(NewCustomHTTPTransport())
return core, nil
}
// Check if the destination bucket is on a remote site, this code only gets executed
// when federation is enabled, ie when globalDNSConfig is non 'nil'.
//
// This function is similar to isRemoteCallRequired but specifically for COPY object API
// if destination and source are same we do not need to check for destnation bucket
// to exist locally.
func isRemoteCopyRequired(ctx context.Context, srcBucket, dstBucket string, objAPI ObjectLayer) bool {
if srcBucket == dstBucket {
return false
}
return isRemoteCallRequired(ctx, dstBucket, objAPI)
}
// Check if the bucket is on a remote site, this code only gets executed when federation is enabled.
func isRemoteCallRequired(ctx context.Context, bucket string, objAPI ObjectLayer) bool {
if globalDNSConfig == nil {
return false
}
_, err := objAPI.GetBucketInfo(ctx, bucket)
return err == toObjectErr(errVolumeNotFound, bucket)
}
// CopyObjectHandler - Copy Object
// ----------
// This implementation of the PUT operation adds an object to a bucket
// while reading the object from another source.
// Notice: The S3 client can send secret keys in headers for encryption related jobs,
// the handler should ensure to remove these keys before sending them to the object layer.
// Currently these keys are:
// - X-Amz-Server-Side-Encryption-Customer-Key
// - X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key
func (api objectAPIHandlers) CopyObjectHandler(w http.ResponseWriter, r *http.Request) {
ctx := newContext(r, w, "CopyObject")
defer logger.AuditLog(w, r, "CopyObject", mustGetClaimsFromToken(r))
objectAPI := api.ObjectAPI()
if objectAPI == nil {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrServerNotInitialized), r.URL, guessIsBrowserReq(r))
return
}
if crypto.S3KMS.IsRequested(r.Header) {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrNotImplemented), r.URL, guessIsBrowserReq(r)) // SSE-KMS is not supported
return
}
if !api.EncryptionEnabled() && crypto.IsRequested(r.Header) {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrNotImplemented), r.URL, guessIsBrowserReq(r))
return
}
vars := mux.Vars(r)
dstBucket := vars["bucket"]
dstObject := vars["object"]
if s3Error := checkRequestAuthType(ctx, r, policy.PutObjectAction, dstBucket, dstObject); s3Error != ErrNone {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL, guessIsBrowserReq(r))
return
}
// TODO: Reject requests where body/payload is present, for now we don't even read it.
// Read escaped copy source path to check for parameters.
cpSrcPath := r.Header.Get(xhttp.AmzCopySource)
// Check https://docs.aws.amazon.com/AmazonS3/latest/dev/ObjectVersioning.html
// Regardless of whether you have enabled versioning, each object in your bucket
// has a version ID. If you have not enabled versioning, Amazon S3 sets the value
// of the version ID to null. If you have enabled versioning, Amazon S3 assigns a
// unique version ID value for the object.
if u, err := url.Parse(cpSrcPath); err == nil {
// Check if versionId query param was added, if yes then check if
// its non "null" value, we should error out since we do not support
// any versions other than "null".
if vid := u.Query().Get("versionId"); vid != "" && vid != "null" {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrNoSuchVersion), r.URL, guessIsBrowserReq(r))
return
}
// Note that url.Parse does the unescaping
cpSrcPath = u.Path
}
if vid := r.Header.Get(xhttp.AmzCopySourceVersionID); vid != "" {
// Check if versionId header was added, if yes then check if
// its non "null" value, we should error out since we do not support
// any versions other than "null".
if vid != "null" {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrNoSuchVersion), r.URL, guessIsBrowserReq(r))
return
}
}
srcBucket, srcObject := path2BucketAndObject(cpSrcPath)
// If source object is empty or bucket is empty, reply back invalid copy source.
if srcObject == "" || srcBucket == "" {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidCopySource), r.URL, guessIsBrowserReq(r))
return
}
if s3Error := checkRequestAuthType(ctx, r, policy.GetObjectAction, srcBucket, srcObject); s3Error != ErrNone {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL, guessIsBrowserReq(r))
return
}
// Check if metadata directive is valid.
if !isMetadataDirectiveValid(r.Header) {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidMetadataDirective), r.URL, guessIsBrowserReq(r))
return
}
// This request header needs to be set prior to setting ObjectOptions
if globalAutoEncryption && !crypto.SSEC.IsRequested(r.Header) {
r.Header.Add(crypto.SSEHeader, crypto.SSEAlgorithmAES256)
}
var srcOpts, dstOpts ObjectOptions
srcOpts, err := copySrcOpts(ctx, r, srcBucket, srcObject)
if err != nil {
logger.LogIf(ctx, err)
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
return
}
// convert copy src encryption options for GET calls
var getOpts = ObjectOptions{}
getSSE := encrypt.SSE(srcOpts.ServerSideEncryption)
if getSSE != srcOpts.ServerSideEncryption {
getOpts.ServerSideEncryption = getSSE
}
dstOpts, err = copyDstOpts(ctx, r, dstBucket, dstObject, nil)
if err != nil {
logger.LogIf(ctx, err)
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
return
}
cpSrcDstSame := isStringEqual(pathJoin(srcBucket, srcObject), pathJoin(dstBucket, dstObject))
// Deny if WORM is enabled.
if retention, isWORMBucket := isWORMEnabled(dstBucket); isWORMBucket {
if oi, err := objectAPI.GetObjectInfo(ctx, dstBucket, dstObject, dstOpts); err == nil && retention.Retain(oi.ModTime) {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrMethodNotAllowed), r.URL, guessIsBrowserReq(r))
return
}
}
getObjectNInfo := objectAPI.GetObjectNInfo
if api.CacheAPI() != nil {
getObjectNInfo = api.CacheAPI().GetObjectNInfo
}
var lock = noLock
if !cpSrcDstSame {
lock = readLock
}
checkCopyPrecondFn := func(o ObjectInfo, encETag string) bool {
return checkCopyObjectPreconditions(ctx, w, r, o, encETag)
}
getOpts.CheckCopyPrecondFn = checkCopyPrecondFn
srcOpts.CheckCopyPrecondFn = checkCopyPrecondFn
var rs *HTTPRangeSpec
gr, err := getObjectNInfo(ctx, srcBucket, srcObject, rs, r.Header, lock, getOpts)
if err != nil {
if isErrPreconditionFailed(err) {
return
}
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
return
}
defer gr.Close()
srcInfo := gr.ObjInfo
/// maximum Upload size for object in a single CopyObject operation.
if isMaxObjectSize(srcInfo.Size) {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrEntityTooLarge), r.URL, guessIsBrowserReq(r))
return
}
// We have to copy metadata only if source and destination are same.
// this changes for encryption which can be observed below.
if cpSrcDstSame {
srcInfo.metadataOnly = true
}
var reader io.Reader
var length = srcInfo.Size
// Set the actual size to the decrypted size if encrypted.
actualSize := srcInfo.Size
if crypto.IsEncrypted(srcInfo.UserDefined) {
actualSize, err = srcInfo.DecryptedSize()
if err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
return
}
length = actualSize
}
var compressMetadata map[string]string
// No need to compress for remote etcd calls
// Pass the decompressed stream to such calls.
isCompressed := objectAPI.IsCompressionSupported() && isCompressible(r.Header, srcObject) && !isRemoteCopyRequired(ctx, srcBucket, dstBucket, objectAPI)
if isCompressed {
compressMetadata = make(map[string]string, 2)
// Preserving the compression metadata.
compressMetadata[ReservedMetadataPrefix+"compression"] = compressionAlgorithmV2
compressMetadata[ReservedMetadataPrefix+"actual-size"] = strconv.FormatInt(actualSize, 10)
// Remove all source encrypted related metadata to
// avoid copying them in target object.
crypto.RemoveInternalEntries(srcInfo.UserDefined)
s2c := newS2CompressReader(gr)
defer s2c.Close()
reader = s2c
length = -1
} else {
// Remove the metadata for remote calls.
delete(srcInfo.UserDefined, ReservedMetadataPrefix+"compression")
delete(srcInfo.UserDefined, ReservedMetadataPrefix+"actual-size")
reader = gr
}
srcInfo.Reader, err = hash.NewReader(reader, length, "", "", actualSize, globalCLIContext.StrictS3Compat)
if err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
return
}
rawReader := srcInfo.Reader
pReader := NewPutObjReader(srcInfo.Reader, nil, nil)
var encMetadata = make(map[string]string)
if objectAPI.IsEncryptionSupported() && !isCompressed {
// Encryption parameters not applicable for this object.
if !crypto.IsEncrypted(srcInfo.UserDefined) && crypto.SSECopy.IsRequested(r.Header) {
writeErrorResponse(ctx, w, toAPIError(ctx, errInvalidEncryptionParameters), r.URL, guessIsBrowserReq(r))
return
}
// Encryption parameters not present for this object.
if crypto.SSEC.IsEncrypted(srcInfo.UserDefined) && !crypto.SSECopy.IsRequested(r.Header) {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidSSECustomerAlgorithm), r.URL, guessIsBrowserReq(r))
return
}
var oldKey, newKey, objEncKey []byte
sseCopyS3 := crypto.S3.IsEncrypted(srcInfo.UserDefined)
sseCopyC := crypto.SSEC.IsEncrypted(srcInfo.UserDefined) && crypto.SSECopy.IsRequested(r.Header)
sseC := crypto.SSEC.IsRequested(r.Header)
sseS3 := crypto.S3.IsRequested(r.Header)
isSourceEncrypted := sseCopyC || sseCopyS3
isTargetEncrypted := sseC || sseS3
if sseC {
newKey, err = ParseSSECustomerRequest(r)
if err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
return
}
}
// If src == dst and either
// - the object is encrypted using SSE-C and two different SSE-C keys are present
// - the object is encrypted using SSE-S3 and the SSE-S3 header is present
// than execute a key rotation.
var keyRotation bool
if cpSrcDstSame && (sseCopyC && sseC) {
oldKey, err = ParseSSECopyCustomerRequest(r.Header, srcInfo.UserDefined)
if err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
return
}
for k, v := range srcInfo.UserDefined {
if hasPrefix(k, ReservedMetadataPrefix) {
encMetadata[k] = v
}
}
// In case of SSE-S3 oldKey and newKey aren't used - the KMS manages the keys.
if err = rotateKey(oldKey, newKey, srcBucket, srcObject, encMetadata); err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
return
}
// Since we are rotating the keys, make sure to update the metadata.
srcInfo.metadataOnly = true
keyRotation = true
} else {
if isSourceEncrypted || isTargetEncrypted {
// We are not only copying just metadata instead
// we are creating a new object at this point, even
// if source and destination are same objects.
if !keyRotation {
srcInfo.metadataOnly = false
}
}
// Calculate the size of the target object
var targetSize int64
switch {
case !isSourceEncrypted && !isTargetEncrypted:
targetSize = srcInfo.Size
case isSourceEncrypted && isTargetEncrypted:
objInfo := ObjectInfo{Size: actualSize}
targetSize = objInfo.EncryptedSize()
case !isSourceEncrypted && isTargetEncrypted:
targetSize = srcInfo.EncryptedSize()
case isSourceEncrypted && !isTargetEncrypted:
targetSize, _ = srcInfo.DecryptedSize()
}
if isTargetEncrypted {
reader, objEncKey, err = newEncryptReader(srcInfo.Reader, newKey, dstBucket, dstObject, encMetadata, sseS3)
if err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
return
}
}
if isSourceEncrypted {
// Remove all source encrypted related metadata to
// avoid copying them in target object.
crypto.RemoveInternalEntries(srcInfo.UserDefined)
}
// do not try to verify encrypted content
srcInfo.Reader, err = hash.NewReader(reader, targetSize, "", "", targetSize, globalCLIContext.StrictS3Compat)
if err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
return
}
pReader = NewPutObjReader(rawReader, srcInfo.Reader, objEncKey)
}
}
srcInfo.PutObjReader = pReader
srcInfo.UserDefined, err = getCpObjMetadataFromHeader(ctx, r, srcInfo.UserDefined)
if err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
return
}
// Store the preserved compression metadata.
for k, v := range compressMetadata {
srcInfo.UserDefined[k] = v
}
// We need to preserve the encryption headers set in EncryptRequest,
// so we do not want to override them, copy them instead.
for k, v := range encMetadata {
srcInfo.UserDefined[k] = v
}
// Ensure that metadata does not contain sensitive information
crypto.RemoveSensitiveEntries(srcInfo.UserDefined)
// Check if x-amz-metadata-directive was not set to REPLACE and source,
// desination are same objects. Apply this restriction also when
// metadataOnly is true indicating that we are not overwriting the object.
// if encryption is enabled we do not need explicit "REPLACE" metadata to
// be enabled as well - this is to allow for key-rotation.
if !isMetadataReplace(r.Header) && srcInfo.metadataOnly && !crypto.IsEncrypted(srcInfo.UserDefined) {
// If x-amz-metadata-directive is not set to REPLACE then we need
// to error out if source and destination are same.
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidCopyDest), r.URL, guessIsBrowserReq(r))
return
}
var objInfo ObjectInfo
if isRemoteCopyRequired(ctx, srcBucket, dstBucket, objectAPI) {
var dstRecords []dns.SrvRecord
dstRecords, err = globalDNSConfig.Get(dstBucket)
if err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
return
}
// Send PutObject request to appropriate instance (in federated deployment)
client, rerr := getRemoteInstanceClient(r, getHostFromSrv(dstRecords))
if rerr != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, rerr), r.URL, guessIsBrowserReq(r))
return
}
remoteObjInfo, rerr := client.PutObject(dstBucket, dstObject, srcInfo.Reader,
srcInfo.Size, "", "", srcInfo.UserDefined, dstOpts.ServerSideEncryption)
if rerr != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, rerr), r.URL, guessIsBrowserReq(r))
return
}
objInfo.ETag = remoteObjInfo.ETag
objInfo.ModTime = remoteObjInfo.LastModified
} else {
// Copy source object to destination, if source and destination
// object is same then only metadata is updated.
objInfo, err = objectAPI.CopyObject(ctx, srcBucket, srcObject, dstBucket, dstObject, srcInfo, srcOpts, dstOpts)