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Copy pathbucket-handlers.go
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1945 lines (1680 loc) · 61.2 KB
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// Copyright (c) 2015-2021 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package cmd
import (
"bytes"
"context"
"encoding/base64"
"encoding/json"
"encoding/xml"
"fmt"
"io"
"net/http"
"net/textproto"
"net/url"
"path"
"sort"
"strconv"
"strings"
"sync"
"time"
"github.com/google/uuid"
"github.com/gorilla/mux"
"github.com/minio/madmin-go"
"github.com/minio/minio-go/v7/pkg/set"
"github.com/minio/minio-go/v7/pkg/tags"
sse "github.com/minio/minio/internal/bucket/encryption"
objectlock "github.com/minio/minio/internal/bucket/object/lock"
"github.com/minio/minio/internal/bucket/replication"
"github.com/minio/minio/internal/config/dns"
"github.com/minio/minio/internal/crypto"
"github.com/minio/minio/internal/event"
"github.com/minio/minio/internal/handlers"
"github.com/minio/minio/internal/hash"
xhttp "github.com/minio/minio/internal/http"
"github.com/minio/minio/internal/kms"
"github.com/minio/minio/internal/logger"
"github.com/minio/minio/internal/sync/errgroup"
"github.com/minio/pkg/bucket/policy"
iampolicy "github.com/minio/pkg/iam/policy"
)
const (
objectLockConfig = "object-lock.xml"
bucketTaggingConfig = "tagging.xml"
bucketReplicationConfig = "replication.xml"
)
// Check if there are buckets on server without corresponding entry in etcd backend and
// make entries. Here is the general flow
// - Range over all the available buckets
// - Check if a bucket has an entry in etcd backend
// -- If no, make an entry
// -- If yes, check if the entry matches local IP check if we
// need to update the entry then proceed to update
// -- If yes, check if the IP of entry matches local IP.
// This means entry is for this instance.
// -- If IP of the entry doesn't match, this means entry is
// for another instance. Log an error to console.
func initFederatorBackend(buckets []BucketInfo, objLayer ObjectLayer) {
if len(buckets) == 0 {
return
}
// Get buckets in the DNS
dnsBuckets, err := globalDNSConfig.List()
if err != nil && !IsErrIgnored(err, dns.ErrNoEntriesFound, dns.ErrNotImplemented, dns.ErrDomainMissing) {
logger.LogIf(GlobalContext, err)
return
}
bucketsSet := set.NewStringSet()
bucketsToBeUpdated := set.NewStringSet()
bucketsInConflict := set.NewStringSet()
// This means that domain is updated, we should update
// all bucket entries with new domain name.
domainMissing := err == dns.ErrDomainMissing
if dnsBuckets != nil {
for _, bucket := range buckets {
bucketsSet.Add(bucket.Name)
r, ok := dnsBuckets[bucket.Name]
if !ok {
bucketsToBeUpdated.Add(bucket.Name)
continue
}
if !globalDomainIPs.Intersection(set.CreateStringSet(getHostsSlice(r)...)).IsEmpty() {
if globalDomainIPs.Difference(set.CreateStringSet(getHostsSlice(r)...)).IsEmpty() && !domainMissing {
// No difference in terms of domainIPs and nothing
// has changed so we don't change anything on the etcd.
//
// Additionally also check if domain is updated/missing with more
// entries, if that is the case we should update the
// new domain entries as well.
continue
}
// if domain IPs intersect then it won't be an empty set.
// such an intersection means that bucket exists on etcd.
// but if we do see a difference with local domain IPs with
// hostSlice from etcd then we should update with newer
// domainIPs, we proceed to do that here.
bucketsToBeUpdated.Add(bucket.Name)
continue
}
// No IPs seem to intersect, this means that bucket exists but has
// different IP addresses perhaps from a different deployment.
// bucket names are globally unique in federation at a given
// path prefix, name collision is not allowed. We simply log
// an error and continue.
bucketsInConflict.Add(bucket.Name)
}
}
// Add/update buckets that are not registered with the DNS
bucketsToBeUpdatedSlice := bucketsToBeUpdated.ToSlice()
g := errgroup.WithNErrs(len(bucketsToBeUpdatedSlice)).WithConcurrency(50)
for index := range bucketsToBeUpdatedSlice {
index := index
g.Go(func() error {
return globalDNSConfig.Put(bucketsToBeUpdatedSlice[index])
}, index)
}
ctx := GlobalContext
for _, err := range g.Wait() {
if err != nil {
logger.LogIf(ctx, err)
return
}
}
for _, bucket := range bucketsInConflict.ToSlice() {
logger.LogIf(ctx, fmt.Errorf("Unable to add bucket DNS entry for bucket %s, an entry exists for the same bucket by a different tenant. This local bucket will be ignored. Bucket names are globally unique in federated deployments. Use path style requests on following addresses '%v' to access this bucket", bucket, globalDomainIPs.ToSlice()))
}
var wg sync.WaitGroup
// Remove buckets that are in DNS for this server, but aren't local
for bucket, records := range dnsBuckets {
if bucketsSet.Contains(bucket) {
continue
}
if globalDomainIPs.Intersection(set.CreateStringSet(getHostsSlice(records)...)).IsEmpty() {
// This is not for our server, so we can continue
continue
}
wg.Add(1)
go func(bucket string) {
defer wg.Done()
// We go to here, so we know the bucket no longer exists,
// but is registered in DNS to this server
if err := globalDNSConfig.Delete(bucket); err != nil {
logger.LogIf(GlobalContext, fmt.Errorf("Failed to remove DNS entry for %s due to %w",
bucket, err))
}
}(bucket)
}
wg.Wait()
}
// GetBucketLocationHandler - GET Bucket location.
// -------------------------
// This operation returns bucket location.
func (api objectAPIHandlers) GetBucketLocationHandler(w http.ResponseWriter, r *http.Request) {
ctx := newContext(r, w, "GetBucketLocation")
defer logger.AuditLog(ctx, w, r, mustGetClaimsFromToken(r))
vars := mux.Vars(r)
bucket := vars["bucket"]
objectAPI := api.ObjectAPI()
if objectAPI == nil {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrServerNotInitialized), r.URL)
return
}
if s3Error := checkRequestAuthType(ctx, r, policy.GetBucketLocationAction, bucket, ""); s3Error != ErrNone {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL)
return
}
getBucketInfo := objectAPI.GetBucketInfo
if _, err := getBucketInfo(ctx, bucket); err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
return
}
// Generate response.
encodedSuccessResponse := encodeResponse(LocationResponse{})
// Get current region.
region := globalSite.Region
if region != globalMinioDefaultRegion {
encodedSuccessResponse = encodeResponse(LocationResponse{
Location: region,
})
}
// Write success response.
writeSuccessResponseXML(w, encodedSuccessResponse)
}
// ListMultipartUploadsHandler - GET Bucket (List Multipart uploads)
// -------------------------
// This operation lists in-progress multipart uploads. An in-progress
// multipart upload is a multipart upload that has been initiated,
// using the Initiate Multipart Upload request, but has not yet been
// completed or aborted. This operation returns at most 1,000 multipart
// uploads in the response.
//
func (api objectAPIHandlers) ListMultipartUploadsHandler(w http.ResponseWriter, r *http.Request) {
ctx := newContext(r, w, "ListMultipartUploads")
defer logger.AuditLog(ctx, w, r, mustGetClaimsFromToken(r))
vars := mux.Vars(r)
bucket := vars["bucket"]
objectAPI := api.ObjectAPI()
if objectAPI == nil {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrServerNotInitialized), r.URL)
return
}
if s3Error := checkRequestAuthType(ctx, r, policy.ListBucketMultipartUploadsAction, bucket, ""); s3Error != ErrNone {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL)
return
}
prefix, keyMarker, uploadIDMarker, delimiter, maxUploads, encodingType, errCode := getBucketMultipartResources(r.Form)
if errCode != ErrNone {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(errCode), r.URL)
return
}
if maxUploads < 0 {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidMaxUploads), r.URL)
return
}
if keyMarker != "" {
// Marker not common with prefix is not implemented.
if !HasPrefix(keyMarker, prefix) {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrNotImplemented), r.URL)
return
}
}
listMultipartsInfo, err := objectAPI.ListMultipartUploads(ctx, bucket, prefix, keyMarker, uploadIDMarker, delimiter, maxUploads)
if err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
return
}
// generate response
response := generateListMultipartUploadsResponse(bucket, listMultipartsInfo, encodingType)
encodedSuccessResponse := encodeResponse(response)
// write success response.
writeSuccessResponseXML(w, encodedSuccessResponse)
}
// ListBucketsHandler - GET Service.
// -----------
// This implementation of the GET operation returns a list of all buckets
// owned by the authenticated sender of the request.
func (api objectAPIHandlers) ListBucketsHandler(w http.ResponseWriter, r *http.Request) {
ctx := newContext(r, w, "ListBuckets")
defer logger.AuditLog(ctx, w, r, mustGetClaimsFromToken(r))
objectAPI := api.ObjectAPI()
if objectAPI == nil {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrServerNotInitialized), r.URL)
return
}
listBuckets := objectAPI.ListBuckets
cred, owner, s3Error := checkRequestAuthTypeCredential(ctx, r, policy.ListAllMyBucketsAction, "", "")
if s3Error != ErrNone && s3Error != ErrAccessDenied {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL)
return
}
// Anonymous users, should be rejected.
if cred.AccessKey == "" {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrAccessDenied), r.URL)
return
}
// If etcd, dns federation configured list buckets from etcd.
var bucketsInfo []BucketInfo
if globalDNSConfig != nil && globalBucketFederation {
dnsBuckets, err := globalDNSConfig.List()
if err != nil && !IsErrIgnored(err,
dns.ErrNoEntriesFound,
dns.ErrDomainMissing) {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
return
}
for _, dnsRecords := range dnsBuckets {
bucketsInfo = append(bucketsInfo, BucketInfo{
Name: dnsRecords[0].Key,
Created: dnsRecords[0].CreationDate,
})
}
sort.Slice(bucketsInfo, func(i, j int) bool {
return bucketsInfo[i].Name < bucketsInfo[j].Name
})
} else {
// Invoke the list buckets.
var err error
bucketsInfo, err = listBuckets(ctx)
if err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
return
}
}
if s3Error == ErrAccessDenied {
// Set prefix value for "s3:prefix" policy conditionals.
r.Header.Set("prefix", "")
// Set delimiter value for "s3:delimiter" policy conditionals.
r.Header.Set("delimiter", SlashSeparator)
n := 0
// Use the following trick to filter in place
// https://github.com/golang/go/wiki/SliceTricks#filter-in-place
for _, bucketInfo := range bucketsInfo {
if globalIAMSys.IsAllowed(iampolicy.Args{
AccountName: cred.AccessKey,
Groups: cred.Groups,
Action: iampolicy.ListBucketAction,
BucketName: bucketInfo.Name,
ConditionValues: getConditionValues(r, "", cred.AccessKey, cred.Claims),
IsOwner: owner,
ObjectName: "",
Claims: cred.Claims,
}) {
bucketsInfo[n] = bucketInfo
n++
}
}
bucketsInfo = bucketsInfo[:n]
// No buckets can be filtered return access denied error.
if len(bucketsInfo) == 0 {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL)
return
}
}
// Generate response.
response := generateListBucketsResponse(bucketsInfo)
encodedSuccessResponse := encodeResponse(response)
// Write response.
writeSuccessResponseXML(w, encodedSuccessResponse)
}
// DeleteMultipleObjectsHandler - deletes multiple objects.
func (api objectAPIHandlers) DeleteMultipleObjectsHandler(w http.ResponseWriter, r *http.Request) {
ctx := newContext(r, w, "DeleteMultipleObjects")
defer logger.AuditLog(ctx, w, r, mustGetClaimsFromToken(r))
vars := mux.Vars(r)
bucket := vars["bucket"]
objectAPI := api.ObjectAPI()
if objectAPI == nil {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrServerNotInitialized), r.URL)
return
}
// Content-Md5 is requied should be set
// http://docs.aws.amazon.com/AmazonS3/latest/API/multiobjectdeleteapi.html
if _, ok := r.Header[xhttp.ContentMD5]; !ok {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrMissingContentMD5), r.URL)
return
}
// Content-Length is required and should be non-zero
// http://docs.aws.amazon.com/AmazonS3/latest/API/multiobjectdeleteapi.html
if r.ContentLength <= 0 {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrMissingContentLength), r.URL)
return
}
// The max. XML contains 100000 object names (each at most 1024 bytes long) + XML overhead
const maxBodySize = 2 * 100000 * 1024
// Unmarshal list of keys to be deleted.
deleteObjectsReq := &DeleteObjectsRequest{}
if err := xmlDecoder(r.Body, deleteObjectsReq, maxBodySize); err != nil {
logger.LogIf(ctx, err, logger.Application)
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
return
}
objects := make([]ObjectV, len(deleteObjectsReq.Objects))
// Convert object name delete objects if it has `/` in the beginning.
for i := range deleteObjectsReq.Objects {
deleteObjectsReq.Objects[i].ObjectName = trimLeadingSlash(deleteObjectsReq.Objects[i].ObjectName)
objects[i] = deleteObjectsReq.Objects[i].ObjectV
}
// Make sure to update context to print ObjectNames for multi objects.
ctx = updateReqContext(ctx, objects...)
// Call checkRequestAuthType to populate ReqInfo.AccessKey before GetBucketInfo()
// Ignore errors here to preserve the S3 error behavior of GetBucketInfo()
checkRequestAuthType(ctx, r, policy.DeleteObjectAction, bucket, "")
// Before proceeding validate if bucket exists.
_, err := objectAPI.GetBucketInfo(ctx, bucket)
if err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
return
}
deleteObjectsFn := objectAPI.DeleteObjects
if api.CacheAPI() != nil {
deleteObjectsFn = api.CacheAPI().DeleteObjects
}
// Return Malformed XML as S3 spec if the number of objects is empty
if len(deleteObjectsReq.Objects) == 0 || len(deleteObjectsReq.Objects) > maxDeleteList {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrMalformedXML), r.URL)
return
}
objectsToDelete := map[ObjectToDelete]int{}
getObjectInfoFn := objectAPI.GetObjectInfo
if api.CacheAPI() != nil {
getObjectInfoFn = api.CacheAPI().GetObjectInfo
}
var (
hasLockEnabled bool
dsc ReplicateDecision
goi ObjectInfo
gerr error
)
replicateDeletes := hasReplicationRules(ctx, bucket, deleteObjectsReq.Objects)
if rcfg, _ := globalBucketObjectLockSys.Get(bucket); rcfg.LockEnabled {
hasLockEnabled = true
}
versioned := globalBucketVersioningSys.Enabled(bucket)
suspended := globalBucketVersioningSys.Suspended(bucket)
type deleteResult struct {
delInfo DeletedObject
errInfo DeleteError
}
deleteResults := make([]deleteResult, len(deleteObjectsReq.Objects))
oss := make([]*objSweeper, len(deleteObjectsReq.Objects))
for index, object := range deleteObjectsReq.Objects {
if apiErrCode := checkRequestAuthType(ctx, r, policy.DeleteObjectAction, bucket, object.ObjectName); apiErrCode != ErrNone {
if apiErrCode == ErrSignatureDoesNotMatch || apiErrCode == ErrInvalidAccessKeyID {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(apiErrCode), r.URL)
return
}
apiErr := errorCodes.ToAPIErr(apiErrCode)
deleteResults[index].errInfo = DeleteError{
Code: apiErr.Code,
Message: apiErr.Description,
Key: object.ObjectName,
VersionID: object.VersionID,
}
continue
}
if object.VersionID != "" && object.VersionID != nullVersionID {
if _, err := uuid.Parse(object.VersionID); err != nil {
logger.LogIf(ctx, fmt.Errorf("invalid version-id specified %w", err))
apiErr := errorCodes.ToAPIErr(ErrNoSuchVersion)
deleteResults[index].errInfo = DeleteError{
Code: apiErr.Code,
Message: apiErr.Description,
Key: object.ObjectName,
VersionID: object.VersionID,
}
continue
}
}
opts := ObjectOptions{
VersionID: object.VersionID,
Versioned: versioned,
VersionSuspended: suspended,
}
if replicateDeletes || object.VersionID != "" && hasLockEnabled || !globalTierConfigMgr.Empty() {
if !globalTierConfigMgr.Empty() && object.VersionID == "" && opts.VersionSuspended {
opts.VersionID = nullVersionID
}
goi, gerr = getObjectInfoFn(ctx, bucket, object.ObjectName, opts)
}
if !globalTierConfigMgr.Empty() {
oss[index] = newObjSweeper(bucket, object.ObjectName).WithVersion(opts.VersionID).WithVersioning(versioned, suspended)
oss[index].SetTransitionState(goi.TransitionedObject)
}
if replicateDeletes {
dsc = checkReplicateDelete(ctx, bucket, ObjectToDelete{
ObjectV: ObjectV{
ObjectName: object.ObjectName,
VersionID: object.VersionID,
},
}, goi, opts, gerr)
if dsc.ReplicateAny() {
if object.VersionID != "" {
object.VersionPurgeStatus = Pending
object.VersionPurgeStatuses = dsc.PendingStatus()
} else {
object.DeleteMarkerReplicationStatus = dsc.PendingStatus()
}
object.ReplicateDecisionStr = dsc.String()
}
}
if object.VersionID != "" && hasLockEnabled {
if apiErrCode := enforceRetentionBypassForDelete(ctx, r, bucket, object, goi, gerr); apiErrCode != ErrNone {
apiErr := errorCodes.ToAPIErr(apiErrCode)
deleteResults[index].errInfo = DeleteError{
Code: apiErr.Code,
Message: apiErr.Description,
Key: object.ObjectName,
VersionID: object.VersionID,
}
continue
}
}
// Avoid duplicate objects, we use map to filter them out.
if _, ok := objectsToDelete[object]; !ok {
objectsToDelete[object] = index
}
}
toNames := func(input map[ObjectToDelete]int) (output []ObjectToDelete) {
output = make([]ObjectToDelete, len(input))
idx := 0
for obj := range input {
output[idx] = obj
idx++
}
return
}
// Disable timeouts and cancellation
ctx = bgContext(ctx)
deleteList := toNames(objectsToDelete)
dObjects, errs := deleteObjectsFn(ctx, bucket, deleteList, ObjectOptions{
Versioned: versioned,
VersionSuspended: suspended,
})
for i := range errs {
// DeleteMarkerVersionID is not used specifically to avoid
// lookup errors, since DeleteMarkerVersionID is only
// created during DeleteMarker creation when client didn't
// specify a versionID.
objToDel := ObjectToDelete{
ObjectV: ObjectV{
ObjectName: dObjects[i].ObjectName,
VersionID: dObjects[i].VersionID,
},
VersionPurgeStatus: dObjects[i].VersionPurgeStatus(),
VersionPurgeStatuses: dObjects[i].ReplicationState.VersionPurgeStatusInternal,
DeleteMarkerReplicationStatus: dObjects[i].ReplicationState.ReplicationStatusInternal,
ReplicateDecisionStr: dObjects[i].ReplicationState.ReplicateDecisionStr,
}
dindex := objectsToDelete[objToDel]
if errs[i] == nil || isErrObjectNotFound(errs[i]) || isErrVersionNotFound(errs[i]) {
if replicateDeletes {
dObjects[i].ReplicationState = deleteList[i].ReplicationState()
}
deleteResults[dindex].delInfo = dObjects[i]
continue
}
apiErr := toAPIError(ctx, errs[i])
deleteResults[dindex].errInfo = DeleteError{
Code: apiErr.Code,
Message: apiErr.Description,
Key: deleteList[i].ObjectName,
VersionID: deleteList[i].VersionID,
}
}
// Generate response
deleteErrors := make([]DeleteError, 0, len(deleteObjectsReq.Objects))
deletedObjects := make([]DeletedObject, 0, len(deleteObjectsReq.Objects))
for _, deleteResult := range deleteResults {
if deleteResult.errInfo.Code != "" {
deleteErrors = append(deleteErrors, deleteResult.errInfo)
} else {
deletedObjects = append(deletedObjects, deleteResult.delInfo)
}
}
response := generateMultiDeleteResponse(deleteObjectsReq.Quiet, deletedObjects, deleteErrors)
encodedSuccessResponse := encodeResponse(response)
// Write success response.
writeSuccessResponseXML(w, encodedSuccessResponse)
for _, dobj := range deletedObjects {
if dobj.ObjectName == "" {
continue
}
if replicateDeletes {
if dobj.DeleteMarkerReplicationStatus() == replication.Pending || dobj.VersionPurgeStatus() == Pending {
dv := DeletedObjectReplicationInfo{
DeletedObject: dobj,
Bucket: bucket,
}
scheduleReplicationDelete(ctx, dv, objectAPI)
}
}
}
// Notify deleted event for objects.
for _, dobj := range deletedObjects {
if dobj.ObjectName == "" {
continue
}
eventName := event.ObjectRemovedDelete
objInfo := ObjectInfo{
Name: dobj.ObjectName,
VersionID: dobj.VersionID,
DeleteMarker: dobj.DeleteMarker,
}
if objInfo.DeleteMarker {
objInfo.VersionID = dobj.DeleteMarkerVersionID
eventName = event.ObjectRemovedDeleteMarkerCreated
}
sendEvent(eventArgs{
EventName: eventName,
BucketName: bucket,
Object: objInfo,
ReqParams: extractReqParams(r),
RespElements: extractRespElements(w),
UserAgent: r.UserAgent(),
Host: handlers.GetSourceIP(r),
})
}
// Clean up transitioned objects from remote tier
for _, os := range oss {
if os == nil { // skip objects that weren't deleted due to invalid versionID etc.
continue
}
logger.LogIf(ctx, os.Sweep())
}
}
// PutBucketHandler - PUT Bucket
// ----------
// This implementation of the PUT operation creates a new bucket for authenticated request
func (api objectAPIHandlers) PutBucketHandler(w http.ResponseWriter, r *http.Request) {
ctx := newContext(r, w, "PutBucket")
defer logger.AuditLog(ctx, w, r, mustGetClaimsFromToken(r))
objectAPI := api.ObjectAPI()
if objectAPI == nil {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrServerNotInitialized), r.URL)
return
}
vars := mux.Vars(r)
bucket := vars["bucket"]
objectLockEnabled := false
if vs, found := r.Header[http.CanonicalHeaderKey("x-amz-bucket-object-lock-enabled")]; found {
v := strings.ToLower(strings.Join(vs, ""))
if v != "true" && v != "false" {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidRequest), r.URL)
return
}
objectLockEnabled = v == "true"
}
if s3Error := checkRequestAuthType(ctx, r, policy.CreateBucketAction, bucket, ""); s3Error != ErrNone {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL)
return
}
// Parse incoming location constraint.
location, s3Error := parseLocationConstraint(r)
if s3Error != ErrNone {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL)
return
}
// Validate if location sent by the client is valid, reject
// requests which do not follow valid region requirements.
if !isValidLocation(location) {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidRegion), r.URL)
return
}
opts := BucketOptions{
Location: location,
LockEnabled: objectLockEnabled,
}
if globalDNSConfig != nil {
sr, err := globalDNSConfig.Get(bucket)
if err != nil {
// ErrNotImplemented indicates a DNS backend that doesn't need to check if bucket already
// exists elsewhere
if err == dns.ErrNoEntriesFound || err == dns.ErrNotImplemented {
// Proceed to creating a bucket.
if err = objectAPI.MakeBucketWithLocation(ctx, bucket, opts); err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
return
}
if err = globalDNSConfig.Put(bucket); err != nil {
objectAPI.DeleteBucket(context.Background(), bucket, DeleteBucketOptions{Force: false, NoRecreate: true})
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
return
}
// Load updated bucket metadata into memory.
globalNotificationSys.LoadBucketMetadata(GlobalContext, bucket)
// Make sure to add Location information here only for bucket
w.Header().Set(xhttp.Location,
getObjectLocation(r, globalDomainNames, bucket, ""))
writeSuccessResponseHeadersOnly(w)
sendEvent(eventArgs{
EventName: event.BucketCreated,
BucketName: bucket,
ReqParams: extractReqParams(r),
RespElements: extractRespElements(w),
UserAgent: r.UserAgent(),
Host: handlers.GetSourceIP(r),
})
return
}
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
return
}
apiErr := ErrBucketAlreadyExists
if !globalDomainIPs.Intersection(set.CreateStringSet(getHostsSlice(sr)...)).IsEmpty() {
apiErr = ErrBucketAlreadyOwnedByYou
}
// No IPs seem to intersect, this means that bucket exists but has
// different IP addresses perhaps from a different deployment.
// bucket names are globally unique in federation at a given
// path prefix, name collision is not allowed. Return appropriate error.
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(apiErr), r.URL)
return
}
// Proceed to creating a bucket.
err := objectAPI.MakeBucketWithLocation(ctx, bucket, opts)
if _, ok := err.(BucketExists); ok {
// Though bucket exists locally, we send the site-replication
// hook to ensure all sites have this bucket. If the hook
// succeeds, the client will still receive a bucket exists
// message.
err2 := globalSiteReplicationSys.MakeBucketHook(ctx, bucket, opts)
if err2 != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
return
}
}
if err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
return
}
// Load updated bucket metadata into memory.
globalNotificationSys.LoadBucketMetadata(GlobalContext, bucket)
// Call site replication hook
err = globalSiteReplicationSys.MakeBucketHook(ctx, bucket, opts)
if err != nil {
writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
return
}
// Make sure to add Location information here only for bucket
if cp := pathClean(r.URL.Path); cp != "" {
w.Header().Set(xhttp.Location, cp) // Clean any trailing slashes.
}
writeSuccessResponseHeadersOnly(w)
sendEvent(eventArgs{
EventName: event.BucketCreated,
BucketName: bucket,
ReqParams: extractReqParams(r),
RespElements: extractRespElements(w),
UserAgent: r.UserAgent(),
Host: handlers.GetSourceIP(r),
})
}
// PostPolicyBucketHandler - POST policy
// ----------
// This implementation of the POST operation handles object creation with a specified
// signature policy in multipart/form-data
func (api objectAPIHandlers) PostPolicyBucketHandler(w http.ResponseWriter, r *http.Request) {
ctx := newContext(r, w, "PostPolicyBucket")
defer logger.AuditLog(ctx, w, r, mustGetClaimsFromToken(r))
objectAPI := api.ObjectAPI()
if objectAPI == nil {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrServerNotInitialized), r.URL)
return
}
if crypto.S3KMS.IsRequested(r.Header) { // SSE-KMS is not supported
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrNotImplemented), r.URL)
return
}
if _, ok := crypto.IsRequested(r.Header); !objectAPI.IsEncryptionSupported() && ok {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrNotImplemented), r.URL)
return
}
bucket := mux.Vars(r)["bucket"]
// Require Content-Length to be set in the request
size := r.ContentLength
if size < 0 {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrMissingContentLength), r.URL)
return
}
resource, err := getResource(r.URL.Path, r.Host, globalDomainNames)
if err != nil {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidRequest), r.URL)
return
}
// Make sure that the URL does not contain object name.
if bucket != path.Clean(resource[1:]) {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrMethodNotAllowed), r.URL)
return
}
// Here the parameter is the size of the form data that should
// be loaded in memory, the remaining being put in temporary files.
reader, err := r.MultipartReader()
if err != nil {
logger.LogIf(ctx, err)
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrMalformedPOSTRequest), r.URL)
return
}
// Read multipart data and save in memory and in the disk if needed
form, err := reader.ReadForm(maxFormMemory)
if err != nil {
logger.LogIf(ctx, err, logger.Application)
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrMalformedPOSTRequest), r.URL)
return
}
// Remove all tmp files created during multipart upload
defer form.RemoveAll()
// Extract all form fields
fileBody, fileName, fileSize, formValues, err := extractPostPolicyFormValues(ctx, form)
if err != nil {
logger.LogIf(ctx, err, logger.Application)
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrMalformedPOSTRequest), r.URL)
return
}
// Check if file is provided, error out otherwise.
if fileBody == nil {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrPOSTFileRequired), r.URL)
return
}
// Close multipart file
defer fileBody.Close()
formValues.Set("Bucket", bucket)
if fileName != "" && strings.Contains(formValues.Get("Key"), "${filename}") {
// S3 feature to replace ${filename} found in Key form field
// by the filename attribute passed in multipart
formValues.Set("Key", strings.ReplaceAll(formValues.Get("Key"), "${filename}", fileName))
}
object := trimLeadingSlash(formValues.Get("Key"))
successRedirect := formValues.Get("success_action_redirect")
successStatus := formValues.Get("success_action_status")
var redirectURL *url.URL
if successRedirect != "" {
redirectURL, err = url.Parse(successRedirect)
if err != nil {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrMalformedPOSTRequest), r.URL)
return
}
}
// Verify policy signature.
cred, errCode := doesPolicySignatureMatch(formValues)
if errCode != ErrNone {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(errCode), r.URL)
return
}
// Once signature is validated, check if the user has
// explicit permissions for the user.
if !globalIAMSys.IsAllowed(iampolicy.Args{
AccountName: cred.AccessKey,
Groups: cred.Groups,
Action: iampolicy.PutObjectAction,
ConditionValues: getConditionValues(r, "", cred.AccessKey, cred.Claims),
BucketName: bucket,
ObjectName: object,
IsOwner: globalActiveCred.AccessKey == cred.AccessKey,
Claims: cred.Claims,
}) {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrAccessDenied), r.URL)
return
}
policyBytes, err := base64.StdEncoding.DecodeString(formValues.Get("Policy"))
if err != nil {
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrMalformedPOSTRequest), r.URL)
return
}
// Handle policy if it is set.
if len(policyBytes) > 0 {
postPolicyForm, err := parsePostPolicyForm(bytes.NewReader(policyBytes))
if err != nil {
errAPI := errorCodes.ToAPIErr(ErrPostPolicyConditionInvalidFormat)
errAPI.Description = fmt.Sprintf("%s '(%s)'", errAPI.Description, err)
writeErrorResponse(ctx, w, errAPI, r.URL)
return
}
// Make sure formValues adhere to policy restrictions.
if err = checkPostPolicy(formValues, postPolicyForm); err != nil {
writeErrorResponse(ctx, w, errorCodes.ToAPIErrWithErr(ErrAccessDenied, err), r.URL)
return
}
// Ensure that the object size is within expected range, also the file size
// should not exceed the maximum single Put size (5 GiB)
lengthRange := postPolicyForm.Conditions.ContentLengthRange
if lengthRange.Valid {
if fileSize < lengthRange.Min {
writeErrorResponse(ctx, w, toAPIError(ctx, errDataTooSmall), r.URL)
return
}
if fileSize > lengthRange.Max || isMaxObjectSize(fileSize) {
writeErrorResponse(ctx, w, toAPIError(ctx, errDataTooLarge), r.URL)
return
}