508 lines
15 KiB
Go
508 lines
15 KiB
Go
// Copyright (c) 2015-2021 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package cmd
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import (
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"bytes"
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"context"
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"errors"
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"fmt"
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"io"
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"io/ioutil"
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"net/http"
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"sort"
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"strings"
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"github.com/minio/minio/internal/crypto"
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xioutil "github.com/minio/minio/internal/ioutil"
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"github.com/minio/minio/internal/logger"
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"github.com/minio/pkg/bucket/policy"
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xnet "github.com/minio/pkg/net"
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"github.com/minio/zipindex"
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)
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const (
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archiveType = "zip"
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archiveExt = "." + archiveType // ".zip"
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archiveSeparator = "/"
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archivePattern = archiveExt + archiveSeparator // ".zip/"
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archiveTypeMetadataKey = ReservedMetadataPrefixLower + "archive-type" // "x-minio-internal-archive-type"
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archiveInfoMetadataKey = ReservedMetadataPrefixLower + "archive-info" // "x-minio-internal-archive-info"
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// Peek into a zip archive
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xMinIOExtract = "x-minio-extract"
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)
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// splitZipExtensionPath splits the S3 path to the zip file and the path inside the zip:
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// e.g /path/to/archive.zip/backup-2021/myimage.png => /path/to/archive.zip, backup/myimage.png
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func splitZipExtensionPath(input string) (zipPath, object string, err error) {
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idx := strings.Index(input, archivePattern)
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if idx < 0 {
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// Should never happen
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return "", "", errors.New("unable to parse zip path")
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}
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return input[:idx+len(archivePattern)-1], input[idx+len(archivePattern):], nil
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}
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// getObjectInArchiveFileHandler - GET Object in the archive file
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func (api objectAPIHandlers) getObjectInArchiveFileHandler(ctx context.Context, objectAPI ObjectLayer, bucket, object string, w http.ResponseWriter, r *http.Request) {
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if crypto.S3.IsRequested(r.Header) || crypto.S3KMS.IsRequested(r.Header) { // If SSE-S3 or SSE-KMS present -> AWS fails with undefined error
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writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrBadRequest), r.URL)
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return
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}
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if _, ok := crypto.IsRequested(r.Header); !objectAPI.IsEncryptionSupported() && ok {
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writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrBadRequest), r.URL)
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return
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}
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zipPath, object, err := splitZipExtensionPath(object)
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if err != nil {
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writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
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return
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}
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// get gateway encryption options
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opts, err := getOpts(ctx, r, bucket, zipPath)
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if err != nil {
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writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
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return
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}
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getObjectInfo := objectAPI.GetObjectInfo
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if api.CacheAPI() != nil {
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getObjectInfo = api.CacheAPI().GetObjectInfo
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}
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// Check for auth type to return S3 compatible error.
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// type to return the correct error (NoSuchKey vs AccessDenied)
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if s3Error := checkRequestAuthType(ctx, r, policy.GetObjectAction, bucket, zipPath); s3Error != ErrNone {
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if getRequestAuthType(r) == authTypeAnonymous {
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// As per "Permission" section in
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// https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectGET.html
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// If the object you request does not exist,
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// the error Amazon S3 returns depends on
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// whether you also have the s3:ListBucket
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// permission.
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// * If you have the s3:ListBucket permission
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// on the bucket, Amazon S3 will return an
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// HTTP status code 404 ("no such key")
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// error.
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// * if you don’t have the s3:ListBucket
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// permission, Amazon S3 will return an HTTP
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// status code 403 ("access denied") error.`
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if globalPolicySys.IsAllowed(policy.Args{
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Action: policy.ListBucketAction,
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BucketName: bucket,
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ConditionValues: getConditionValues(r, "", "", nil),
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IsOwner: false,
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}) {
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_, err = getObjectInfo(ctx, bucket, zipPath, opts)
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if toAPIError(ctx, err).Code == "NoSuchKey" {
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s3Error = ErrNoSuchKey
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}
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}
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}
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writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL)
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return
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}
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// Validate pre-conditions if any.
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opts.CheckPrecondFn = func(oi ObjectInfo) bool {
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if objectAPI.IsEncryptionSupported() {
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if _, err := DecryptObjectInfo(&oi, r); err != nil {
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writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
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return true
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}
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}
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return checkPreconditions(ctx, w, r, oi, opts)
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}
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zipObjInfo, err := getObjectInfo(ctx, bucket, zipPath, opts)
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if err != nil {
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writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
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return
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}
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var zipInfo []byte
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if z, ok := zipObjInfo.UserDefined[archiveInfoMetadataKey]; ok {
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zipInfo = []byte(z)
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} else {
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zipInfo, err = updateObjectMetadataWithZipInfo(ctx, objectAPI, bucket, zipPath, opts)
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}
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if err != nil {
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writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
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return
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}
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file, err := zipindex.FindSerialized(zipInfo, object)
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if err != nil {
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if err == io.EOF {
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writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrNoSuchKey), r.URL)
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} else {
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writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
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}
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return
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}
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// New object info
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fileObjInfo := ObjectInfo{
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Bucket: bucket,
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Name: object,
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Size: int64(file.UncompressedSize64),
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ModTime: zipObjInfo.ModTime,
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}
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var rc io.ReadCloser
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if file.UncompressedSize64 > 0 {
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// We do not know where the file ends, but the returned reader only returns UncompressedSize.
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rs := &HTTPRangeSpec{Start: file.Offset, End: -1}
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gr, err := objectAPI.GetObjectNInfo(ctx, bucket, zipPath, rs, nil, readLock, opts)
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if err != nil {
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writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
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return
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}
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defer gr.Close()
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rc, err = file.Open(gr)
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if err != nil {
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writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
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return
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}
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} else {
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rc = ioutil.NopCloser(bytes.NewReader([]byte{}))
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}
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defer rc.Close()
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if err = setObjectHeaders(w, fileObjInfo, nil, opts); err != nil {
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writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
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return
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}
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setHeadGetRespHeaders(w, r.Form)
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httpWriter := xioutil.WriteOnClose(w)
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// Write object content to response body
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if _, err = xioutil.Copy(httpWriter, rc); err != nil {
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if !httpWriter.HasWritten() {
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// write error response only if no data or headers has been written to client yet
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writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
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return
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}
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if !xnet.IsNetworkOrHostDown(err, true) { // do not need to log disconnected clients
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logger.LogIf(ctx, fmt.Errorf("Unable to write all the data to client %w", err))
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}
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return
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}
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if err = httpWriter.Close(); err != nil {
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if !httpWriter.HasWritten() { // write error response only if no data or headers has been written to client yet
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writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
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return
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}
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if !xnet.IsNetworkOrHostDown(err, true) { // do not need to log disconnected clients
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logger.LogIf(ctx, fmt.Errorf("Unable to write all the data to client %w", err))
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}
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return
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}
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}
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// listObjectsV2InArchive generates S3 listing result ListObjectsV2Info from zip file, all parameters are already validated by the caller.
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func listObjectsV2InArchive(ctx context.Context, objectAPI ObjectLayer, bucket, prefix, token, delimiter string, maxKeys int, fetchOwner bool, startAfter string) (ListObjectsV2Info, error) {
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zipPath, _, err := splitZipExtensionPath(prefix)
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if err != nil {
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// Return empty listing
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return ListObjectsV2Info{}, nil
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}
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zipObjInfo, err := objectAPI.GetObjectInfo(ctx, bucket, zipPath, ObjectOptions{})
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if err != nil {
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// Return empty listing
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return ListObjectsV2Info{}, nil
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}
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var zipInfo []byte
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if z, ok := zipObjInfo.UserDefined[archiveInfoMetadataKey]; ok {
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zipInfo = []byte(z)
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} else {
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// Always update the latest version
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zipInfo, err = updateObjectMetadataWithZipInfo(ctx, objectAPI, bucket, zipPath, ObjectOptions{})
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}
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if err != nil {
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return ListObjectsV2Info{}, err
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}
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files, err := zipindex.DeserializeFiles(zipInfo)
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if err != nil {
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return ListObjectsV2Info{}, err
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}
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sort.Slice(files, func(i, j int) bool {
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return files[i].Name < files[j].Name
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})
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var (
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count int
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isTruncated bool
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nextToken string
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listObjectsInfo ListObjectsV2Info
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)
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// Always set this
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listObjectsInfo.ContinuationToken = token
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// Open and iterate through the files in the archive.
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for _, file := range files {
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objName := zipObjInfo.Name + archiveSeparator + file.Name
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if objName <= startAfter || objName <= token {
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continue
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}
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if strings.HasPrefix(objName, prefix) {
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if count == maxKeys {
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isTruncated = true
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break
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}
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if delimiter != "" {
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i := strings.Index(objName[len(prefix):], delimiter)
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if i >= 0 {
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commonPrefix := objName[:len(prefix)+i+1]
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if len(listObjectsInfo.Prefixes) == 0 || commonPrefix != listObjectsInfo.Prefixes[len(listObjectsInfo.Prefixes)-1] {
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listObjectsInfo.Prefixes = append(listObjectsInfo.Prefixes, commonPrefix)
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count++
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}
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goto next
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}
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}
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listObjectsInfo.Objects = append(listObjectsInfo.Objects, ObjectInfo{
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Bucket: bucket,
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Name: objName,
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Size: int64(file.UncompressedSize64),
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ModTime: zipObjInfo.ModTime,
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})
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count++
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}
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next:
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nextToken = objName
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}
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if isTruncated {
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listObjectsInfo.IsTruncated = true
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listObjectsInfo.NextContinuationToken = nextToken
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}
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return listObjectsInfo, nil
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}
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// getFilesFromZIPObject reads a partial stream of a zip file to build the zipindex.Files index
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func getFilesListFromZIPObject(ctx context.Context, objectAPI ObjectLayer, bucket, object string, opts ObjectOptions) (zipindex.Files, ObjectInfo, error) {
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var size = 1 << 20
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var objSize int64
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for {
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rs := &HTTPRangeSpec{IsSuffixLength: true, Start: int64(-size)}
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gr, err := objectAPI.GetObjectNInfo(ctx, bucket, object, rs, nil, readLock, opts)
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if err != nil {
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return nil, ObjectInfo{}, err
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}
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b, err := ioutil.ReadAll(gr)
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if err != nil {
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gr.Close()
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return nil, ObjectInfo{}, err
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}
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gr.Close()
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if size > len(b) {
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size = len(b)
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}
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// Calculate the object real size if encrypted
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if _, ok := crypto.IsEncrypted(gr.ObjInfo.UserDefined); ok {
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objSize, err = gr.ObjInfo.DecryptedSize()
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if err != nil {
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return nil, ObjectInfo{}, err
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}
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} else {
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objSize = gr.ObjInfo.Size
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}
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files, err := zipindex.ReadDir(b[len(b)-size:], objSize, nil)
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if err == nil {
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return files, gr.ObjInfo, nil
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}
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var terr zipindex.ErrNeedMoreData
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if errors.As(err, &terr) {
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size = int(terr.FromEnd)
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if size <= 0 || size > 100<<20 {
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return nil, ObjectInfo{}, errors.New("zip directory too large")
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}
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} else {
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return nil, ObjectInfo{}, err
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}
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}
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}
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// headObjectInArchiveFileHandler - HEAD Object in an archive file
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func (api objectAPIHandlers) headObjectInArchiveFileHandler(ctx context.Context, objectAPI ObjectLayer, bucket, object string, w http.ResponseWriter, r *http.Request) {
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if crypto.S3.IsRequested(r.Header) || crypto.S3KMS.IsRequested(r.Header) { // If SSE-S3 or SSE-KMS present -> AWS fails with undefined error
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writeErrorResponseHeadersOnly(w, errorCodes.ToAPIErr(ErrBadRequest))
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return
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}
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if _, ok := crypto.IsRequested(r.Header); !objectAPI.IsEncryptionSupported() && ok {
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writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrBadRequest), r.URL)
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return
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}
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zipPath, object, err := splitZipExtensionPath(object)
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if err != nil {
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writeErrorResponseHeadersOnly(w, toAPIError(ctx, err))
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return
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}
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getObjectInfo := objectAPI.GetObjectInfo
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if api.CacheAPI() != nil {
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getObjectInfo = api.CacheAPI().GetObjectInfo
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}
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opts, err := getOpts(ctx, r, bucket, zipPath)
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if err != nil {
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writeErrorResponseHeadersOnly(w, toAPIError(ctx, err))
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return
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}
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if s3Error := checkRequestAuthType(ctx, r, policy.GetObjectAction, bucket, zipPath); s3Error != ErrNone {
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if getRequestAuthType(r) == authTypeAnonymous {
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// As per "Permission" section in
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// https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectHEAD.html
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// If the object you request does not exist,
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// the error Amazon S3 returns depends on
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// whether you also have the s3:ListBucket
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// permission.
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// * If you have the s3:ListBucket permission
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// on the bucket, Amazon S3 will return an
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// HTTP status code 404 ("no such key")
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// error.
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// * if you don’t have the s3:ListBucket
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// permission, Amazon S3 will return an HTTP
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// status code 403 ("access denied") error.`
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if globalPolicySys.IsAllowed(policy.Args{
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Action: policy.ListBucketAction,
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BucketName: bucket,
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ConditionValues: getConditionValues(r, "", "", nil),
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IsOwner: false,
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}) {
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_, err = getObjectInfo(ctx, bucket, zipPath, opts)
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if toAPIError(ctx, err).Code == "NoSuchKey" {
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s3Error = ErrNoSuchKey
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}
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}
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}
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writeErrorResponseHeadersOnly(w, errorCodes.ToAPIErr(s3Error))
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return
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}
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var rs *HTTPRangeSpec
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// Validate pre-conditions if any.
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opts.CheckPrecondFn = func(oi ObjectInfo) bool {
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return checkPreconditions(ctx, w, r, oi, opts)
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}
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zipObjInfo, err := getObjectInfo(ctx, bucket, zipPath, opts)
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if err != nil {
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writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
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return
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}
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var zipInfo []byte
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if z, ok := zipObjInfo.UserDefined[archiveInfoMetadataKey]; ok {
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zipInfo = []byte(z)
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} else {
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zipInfo, err = updateObjectMetadataWithZipInfo(ctx, objectAPI, bucket, zipPath, opts)
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}
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if err != nil {
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writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
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return
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}
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file, err := zipindex.FindSerialized(zipInfo, object)
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if err != nil {
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if err == io.EOF {
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writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrNoSuchKey), r.URL)
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} else {
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writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
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}
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return
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}
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objInfo := ObjectInfo{
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Bucket: bucket,
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Name: file.Name,
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Size: int64(file.UncompressedSize64),
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ModTime: zipObjInfo.ModTime,
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}
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// Set standard object headers.
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if err = setObjectHeaders(w, objInfo, nil, opts); err != nil {
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writeErrorResponseHeadersOnly(w, toAPIError(ctx, err))
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return
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}
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// Set any additional requested response headers.
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setHeadGetRespHeaders(w, r.Form)
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// Successful response.
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if rs != nil {
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w.WriteHeader(http.StatusPartialContent)
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} else {
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w.WriteHeader(http.StatusOK)
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}
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}
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// Update the passed zip object metadata with the zip contents info, file name, modtime, size, etc..
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func updateObjectMetadataWithZipInfo(ctx context.Context, objectAPI ObjectLayer, bucket, object string, opts ObjectOptions) ([]byte, error) {
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files, srcInfo, err := getFilesListFromZIPObject(ctx, objectAPI, bucket, object, opts)
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if err != nil {
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return nil, err
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}
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files.OptimizeSize()
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zipInfo, err := files.Serialize()
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if err != nil {
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return nil, err
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}
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srcInfo.UserDefined[archiveTypeMetadataKey] = archiveType
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srcInfo.UserDefined[archiveInfoMetadataKey] = string(zipInfo)
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srcInfo.metadataOnly = true
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// Always update the same version id & modtime
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// Passing opts twice as source & destination options will update the metadata
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// of the same object version to avoid creating a new version.
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_, err = objectAPI.CopyObject(ctx, bucket, object, bucket, object, srcInfo, opts, opts)
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if err != nil {
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return nil, err
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}
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return zipInfo, nil
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}
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