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minio/cmd/gateway-handlers.go

939 lines
28 KiB

/*
* Minio Cloud Storage, (C) 2017 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 (
"io"
goioutil "io/ioutil"
"net"
"net/http"
"strconv"
"encoding/hex"
"encoding/json"
router "github.com/gorilla/mux"
"github.com/minio/minio-go/pkg/policy"
"github.com/minio/minio/pkg/hash"
"github.com/minio/minio/pkg/ioutil"
)
// GetObjectHandler - GET Object
// ----------
// This implementation of the GET operation retrieves object. To use GET,
// you must have READ access to the object.
func (api gatewayAPIHandlers) GetObjectHandler(w http.ResponseWriter, r *http.Request) {
var object, bucket string
vars := router.Vars(r)
bucket = vars["bucket"]
object = vars["object"]
// Fetch object stat info.
objectAPI := api.ObjectAPI()
if objectAPI == nil {
writeErrorResponse(w, ErrServerNotInitialized, r.URL)
return
}
reqAuthType := getRequestAuthType(r)
switch reqAuthType {
case authTypePresignedV2, authTypeSignedV2:
// Signature V2 validation.
s3Error := isReqAuthenticatedV2(r)
if s3Error != ErrNone {
errorIf(errSignatureMismatch, "%s", dumpRequest(r))
writeErrorResponse(w, s3Error, r.URL)
return
}
case authTypeSigned, authTypePresigned:
s3Error := isReqAuthenticated(r, serverConfig.GetRegion())
if s3Error != ErrNone {
errorIf(errSignatureMismatch, "%s", dumpRequest(r))
writeErrorResponse(w, s3Error, r.URL)
return
}
case authTypeAnonymous:
// No verification needed for anonymous requests.
default:
// For all unknown auth types return error.
writeErrorResponse(w, ErrAccessDenied, r.URL)
return
}
getObjectInfo := objectAPI.GetObjectInfo
if reqAuthType == authTypeAnonymous {
getObjectInfo = objectAPI.AnonGetObjectInfo
}
objInfo, err := getObjectInfo(bucket, object)
if err != nil {
errorIf(err, "Unable to fetch object info.")
apiErr := toAPIErrorCode(err)
if apiErr == ErrNoSuchKey {
apiErr = errAllowableObjectNotFound(bucket, r)
}
writeErrorResponse(w, apiErr, r.URL)
return
}
// Get request range.
var hrange *httpRange
rangeHeader := r.Header.Get("Range")
if rangeHeader != "" {
if hrange, err = parseRequestRange(rangeHeader, objInfo.Size); err != nil {
// Handle only errInvalidRange
// Ignore other parse error and treat it as regular Get request like Amazon S3.
if err == errInvalidRange {
writeErrorResponse(w, ErrInvalidRange, r.URL)
return
}
// log the error.
errorIf(err, "Invalid request range")
}
}
// Validate pre-conditions if any.
if checkPreconditions(w, r, objInfo) {
return
}
// Get the object.
var startOffset int64
length := objInfo.Size
if hrange != nil {
startOffset = hrange.offsetBegin
length = hrange.getLength()
}
getObject := objectAPI.GetObject
if reqAuthType == authTypeAnonymous {
getObject = objectAPI.AnonGetObject
}
setObjectHeaders(w, objInfo, hrange)
setHeadGetRespHeaders(w, r.URL.Query())
httpWriter := ioutil.WriteOnClose(w)
// Reads the object at startOffset and writes to mw.
if err = getObject(bucket, object, startOffset, length, httpWriter); err != nil {
errorIf(err, "Unable to write to client.")
if !httpWriter.HasWritten() {
// Error response only if no data has been written to client yet. i.e if
// partial data has already been written before an error
// occurred then no point in setting StatusCode and
// sending error XML.
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
}
return
}
if err = httpWriter.Close(); err != nil {
if !httpWriter.HasWritten() { // write error response only if no data has been written to client yet
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
}
// Get host and port from Request.RemoteAddr.
host, port, err := net.SplitHostPort(r.RemoteAddr)
if err != nil {
host, port = "", ""
}
// Notify object accessed via a GET request.
eventNotify(eventData{
Type: ObjectAccessedGet,
Bucket: bucket,
ObjInfo: objInfo,
ReqParams: extractReqParams(r),
UserAgent: r.UserAgent(),
Host: host,
Port: port,
})
}
// PutObjectHandler - PUT Object
// ----------
// This implementation of the PUT operation adds an object to a bucket.
func (api gatewayAPIHandlers) PutObjectHandler(w http.ResponseWriter, r *http.Request) {
objectAPI := api.ObjectAPI()
if objectAPI == nil {
writeErrorResponse(w, ErrServerNotInitialized, r.URL)
return
}
// X-Amz-Copy-Source shouldn't be set for this call.
if _, ok := r.Header["X-Amz-Copy-Source"]; ok {
writeErrorResponse(w, ErrInvalidCopySource, r.URL)
return
}
var object, bucket string
vars := router.Vars(r)
bucket = vars["bucket"]
object = vars["object"]
// TODO: we should validate the object name here
// Get Content-Md5 sent by client and verify if valid
md5Bytes, err := checkValidMD5(r.Header.Get("Content-Md5"))
if err != nil {
errorIf(err, "Unable to validate content-md5 format.")
writeErrorResponse(w, ErrInvalidDigest, r.URL)
return
}
/// if Content-Length is unknown/missing, deny the request
size := r.ContentLength
reqAuthType := getRequestAuthType(r)
if reqAuthType == authTypeStreamingSigned {
sizeStr := r.Header.Get("x-amz-decoded-content-length")
size, err = strconv.ParseInt(sizeStr, 10, 64)
if err != nil {
errorIf(err, "Unable to parse `x-amz-decoded-content-length` into its integer value", sizeStr)
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
}
if size == -1 {
writeErrorResponse(w, ErrMissingContentLength, r.URL)
return
}
/// maximum Upload size for objects in a single operation
if isMaxObjectSize(size) {
writeErrorResponse(w, ErrEntityTooLarge, r.URL)
return
}
// Extract metadata to be saved from incoming HTTP header.
metadata, err := extractMetadataFromHeader(r.Header)
if err != nil {
errorIf(err, "found invalid http request header")
writeErrorResponse(w, ErrInternalError, r.URL)
return
}
if reqAuthType == authTypeStreamingSigned {
if contentEncoding, ok := metadata["content-encoding"]; ok {
contentEncoding = trimAwsChunkedContentEncoding(contentEncoding)
if contentEncoding != "" {
// Make sure to trim and save the content-encoding
// parameter for a streaming signature which is set
// to a custom value for example: "aws-chunked,gzip".
metadata["content-encoding"] = contentEncoding
} else {
// Trimmed content encoding is empty when the header
// value is set to "aws-chunked" only.
// Make sure to delete the content-encoding parameter
// for a streaming signature which is set to value
// for example: "aws-chunked"
delete(metadata, "content-encoding")
}
}
}
// Lock the object.
objectLock := globalNSMutex.NewNSLock(bucket, object)
if objectLock.GetLock(globalOperationTimeout) != nil {
writeErrorResponse(w, ErrOperationTimedOut, r.URL)
return
}
defer objectLock.Unlock()
var (
// Make sure we hex encode md5sum here.
md5hex = hex.EncodeToString(md5Bytes)
sha256hex = ""
putObject = objectAPI.PutObject
reader = r.Body
)
switch reqAuthType {
default:
// For all unknown auth types return error.
writeErrorResponse(w, ErrAccessDenied, r.URL)
return
case authTypeAnonymous:
putObject = objectAPI.AnonPutObject
case authTypeStreamingSigned:
// Initialize stream signature verifier.
var s3Error APIErrorCode
reader, s3Error = newSignV4ChunkedReader(r)
if s3Error != ErrNone {
errorIf(errSignatureMismatch, "%s", dumpRequest(r))
writeErrorResponse(w, s3Error, r.URL)
return
}
case authTypeSignedV2, authTypePresignedV2:
s3Error := isReqAuthenticatedV2(r)
if s3Error != ErrNone {
errorIf(errSignatureMismatch, "%s", dumpRequest(r))
writeErrorResponse(w, s3Error, r.URL)
return
}
case authTypePresigned, authTypeSigned:
if s3Error := reqSignatureV4Verify(r, serverConfig.GetRegion()); s3Error != ErrNone {
errorIf(errSignatureMismatch, "%s", dumpRequest(r))
writeErrorResponse(w, s3Error, r.URL)
return
}
if !skipContentSha256Cksum(r) {
sha256hex = getContentSha256Cksum(r)
}
}
hashReader, err := hash.NewReader(reader, size, md5hex, sha256hex)
if err != nil {
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
objInfo, err := putObject(bucket, object, hashReader, metadata)
if err != nil {
errorIf(err, "Unable to save an object %s", r.URL.Path)
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
w.Header().Set("ETag", "\""+objInfo.ETag+"\"")
writeSuccessResponseHeadersOnly(w)
// Get host and port from Request.RemoteAddr.
host, port, err := net.SplitHostPort(r.RemoteAddr)
if err != nil {
host, port = "", ""
}
// Notify object created event.
eventNotify(eventData{
Type: ObjectCreatedPut,
Bucket: bucket,
ObjInfo: objInfo,
ReqParams: extractReqParams(r),
UserAgent: r.UserAgent(),
Host: host,
Port: port,
})
}
// HeadObjectHandler - HEAD Object
// -----------
// The HEAD operation retrieves metadata from an object without returning the object itself.
func (api gatewayAPIHandlers) HeadObjectHandler(w http.ResponseWriter, r *http.Request) {
var object, bucket string
vars := router.Vars(r)
bucket = vars["bucket"]
object = vars["object"]
objectAPI := api.ObjectAPI()
if objectAPI == nil {
writeErrorResponseHeadersOnly(w, ErrServerNotInitialized)
return
}
reqAuthType := getRequestAuthType(r)
switch reqAuthType {
case authTypePresignedV2, authTypeSignedV2:
// Signature V2 validation.
s3Error := isReqAuthenticatedV2(r)
if s3Error != ErrNone {
errorIf(errSignatureMismatch, "%s", dumpRequest(r))
writeErrorResponse(w, s3Error, r.URL)
return
}
case authTypeSigned, authTypePresigned:
s3Error := isReqAuthenticated(r, serverConfig.GetRegion())
if s3Error != ErrNone {
errorIf(errSignatureMismatch, "%s", dumpRequest(r))
writeErrorResponse(w, s3Error, r.URL)
return
}
case authTypeAnonymous:
// No verification needed for anonymous requests.
default:
// For all unknown auth types return error.
writeErrorResponse(w, ErrAccessDenied, r.URL)
return
}
getObjectInfo := objectAPI.GetObjectInfo
if reqAuthType == authTypeAnonymous {
getObjectInfo = objectAPI.AnonGetObjectInfo
}
objInfo, err := getObjectInfo(bucket, object)
if err != nil {
errorIf(err, "Unable to fetch object info.")
apiErr := toAPIErrorCode(err)
if apiErr == ErrNoSuchKey {
apiErr = errAllowableObjectNotFound(bucket, r)
}
writeErrorResponse(w, apiErr, r.URL)
return
}
// Validate pre-conditions if any.
if checkPreconditions(w, r, objInfo) {
return
}
// Set standard object headers.
setObjectHeaders(w, objInfo, nil)
// Set any additional requested response headers.
setHeadGetRespHeaders(w, r.URL.Query())
// Successful response.
w.WriteHeader(http.StatusOK)
// Get host and port from Request.RemoteAddr.
host, port, err := net.SplitHostPort(r.RemoteAddr)
if err != nil {
host, port = "", ""
}
// Notify object accessed via a HEAD request.
eventNotify(eventData{
Type: ObjectAccessedHead,
Bucket: bucket,
ObjInfo: objInfo,
ReqParams: extractReqParams(r),
UserAgent: r.UserAgent(),
Host: host,
Port: port,
})
}
// PutBucketPolicyHandler - PUT Bucket policy
// -----------------
// This implementation of the PUT operation uses the policy
// subresource to add to or replace a policy on a bucket
func (api gatewayAPIHandlers) PutBucketPolicyHandler(w http.ResponseWriter, r *http.Request) {
objAPI := api.ObjectAPI()
if objAPI == nil {
writeErrorResponse(w, ErrServerNotInitialized, r.URL)
return
}
if s3Error := checkRequestAuthType(r, "", "", serverConfig.GetRegion()); s3Error != ErrNone {
writeErrorResponse(w, s3Error, r.URL)
return
}
vars := router.Vars(r)
bucket := vars["bucket"]
// Before proceeding validate if bucket exists.
_, err := objAPI.GetBucketInfo(bucket)
if err != nil {
errorIf(err, "Unable to find bucket info.")
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
// If Content-Length is unknown or zero, deny the
// request. PutBucketPolicy always needs a Content-Length.
if r.ContentLength == -1 || r.ContentLength == 0 {
writeErrorResponse(w, ErrMissingContentLength, r.URL)
return
}
// If Content-Length is greater than maximum allowed policy size.
if r.ContentLength > maxAccessPolicySize {
writeErrorResponse(w, ErrEntityTooLarge, r.URL)
return
}
// Read access policy up to maxAccessPolicySize.
// http://docs.aws.amazon.com/AmazonS3/latest/dev/access-policy-language-overview.html
// bucket policies are limited to 20KB in size, using a limit reader.
policyBytes, err := goioutil.ReadAll(io.LimitReader(r.Body, maxAccessPolicySize))
if err != nil {
errorIf(err, "Unable to read from client.")
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
policyInfo := policy.BucketAccessPolicy{}
if err = json.Unmarshal(policyBytes, &policyInfo); err != nil {
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
if err = objAPI.SetBucketPolicies(bucket, policyInfo); err != nil {
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
// Success.
writeSuccessNoContent(w)
}
// DeleteBucketPolicyHandler - DELETE Bucket policy
// -----------------
// This implementation of the DELETE operation uses the policy
// subresource to add to remove a policy on a bucket.
func (api gatewayAPIHandlers) DeleteBucketPolicyHandler(w http.ResponseWriter, r *http.Request) {
objAPI := api.ObjectAPI()
if objAPI == nil {
writeErrorResponse(w, ErrServerNotInitialized, r.URL)
return
}
if s3Error := checkRequestAuthType(r, "", "", serverConfig.GetRegion()); s3Error != ErrNone {
writeErrorResponse(w, s3Error, r.URL)
return
}
vars := router.Vars(r)
bucket := vars["bucket"]
// Before proceeding validate if bucket exists.
_, err := objAPI.GetBucketInfo(bucket)
if err != nil {
errorIf(err, "Unable to find bucket info.")
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
// Delete bucket access policy, by passing an empty policy
// struct.
objAPI.DeleteBucketPolicies(bucket)
// Success.
writeSuccessNoContent(w)
}
// GetBucketPolicyHandler - GET Bucket policy
// -----------------
// This operation uses the policy
// subresource to return the policy of a specified bucket.
func (api gatewayAPIHandlers) GetBucketPolicyHandler(w http.ResponseWriter, r *http.Request) {
objAPI := api.ObjectAPI()
if objAPI == nil {
writeErrorResponse(w, ErrServerNotInitialized, r.URL)
return
}
if s3Error := checkRequestAuthType(r, "", "", serverConfig.GetRegion()); s3Error != ErrNone {
writeErrorResponse(w, s3Error, r.URL)
return
}
vars := router.Vars(r)
bucket := vars["bucket"]
// Before proceeding validate if bucket exists.
_, err := objAPI.GetBucketInfo(bucket)
if err != nil {
errorIf(err, "Unable to find bucket info.")
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
bp, err := objAPI.GetBucketPolicies(bucket)
if err != nil {
errorIf(err, "Unable to read bucket policy.")
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
policyBytes, err := json.Marshal(bp)
if err != nil {
errorIf(err, "Unable to read bucket policy.")
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
// Write to client.
w.Write(policyBytes)
}
// GetBucketNotificationHandler - This implementation of the GET
// operation uses the notification subresource to return the
// notification configuration of a bucket. If notifications are
// not enabled on the bucket, the operation returns an empty
// NotificationConfiguration element.
func (api gatewayAPIHandlers) GetBucketNotificationHandler(w http.ResponseWriter, r *http.Request) {
writeErrorResponse(w, ErrNotImplemented, r.URL)
}
// PutBucketNotificationHandler - Minio notification feature enables
// you to receive notifications when certain events happen in your bucket.
// Using this API, you can replace an existing notification configuration.
// The configuration is an XML file that defines the event types that you
// want Minio to publish and the destination where you want Minio to publish
// an event notification when it detects an event of the specified type.
// By default, your bucket has no event notifications configured. That is,
// the notification configuration will be an empty NotificationConfiguration.
func (api gatewayAPIHandlers) PutBucketNotificationHandler(w http.ResponseWriter, r *http.Request) {
writeErrorResponse(w, ErrNotImplemented, r.URL)
}
// ListenBucketNotificationHandler - list bucket notifications.
func (api gatewayAPIHandlers) ListenBucketNotificationHandler(w http.ResponseWriter, r *http.Request) {
writeErrorResponse(w, ErrNotImplemented, r.URL)
}
// PutBucketHandler - PUT Bucket
// ----------
// This implementation of the PUT operation creates a new bucket for authenticated request
func (api gatewayAPIHandlers) PutBucketHandler(w http.ResponseWriter, r *http.Request) {
objectAPI := api.ObjectAPI()
if objectAPI == nil {
writeErrorResponse(w, ErrServerNotInitialized, r.URL)
return
}
// PutBucket does not have any bucket action.
s3Error := checkRequestAuthType(r, "", "", serverConfig.GetRegion())
if s3Error != ErrNone {
writeErrorResponse(w, s3Error, r.URL)
return
}
vars := router.Vars(r)
bucket := vars["bucket"]
// Validate if incoming location constraint is valid, reject
// requests which do not follow valid region requirements.
location, s3Error := parseLocationConstraint(r)
if s3Error != ErrNone {
writeErrorResponse(w, s3Error, r.URL)
return
}
bucketLock := globalNSMutex.NewNSLock(bucket, "")
if bucketLock.GetLock(globalOperationTimeout) != nil {
writeErrorResponse(w, ErrOperationTimedOut, r.URL)
return
}
defer bucketLock.Unlock()
// Proceed to creating a bucket.
err := objectAPI.MakeBucketWithLocation(bucket, location)
if err != nil {
errorIf(err, "Unable to create a bucket.")
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
// Make sure to add Location information here only for bucket
w.Header().Set("Location", getLocation(r))
writeSuccessResponseHeadersOnly(w)
}
// DeleteBucketHandler - Delete bucket
func (api gatewayAPIHandlers) DeleteBucketHandler(w http.ResponseWriter, r *http.Request) {
objectAPI := api.ObjectAPI()
if objectAPI == nil {
writeErrorResponse(w, ErrServerNotInitialized, r.URL)
return
}
// DeleteBucket does not have any bucket action.
if s3Error := checkRequestAuthType(r, "", "", serverConfig.GetRegion()); s3Error != ErrNone {
writeErrorResponse(w, s3Error, r.URL)
return
}
vars := router.Vars(r)
bucket := vars["bucket"]
// Attempt to delete bucket.
if err := objectAPI.DeleteBucket(bucket); err != nil {
errorIf(err, "Unable to delete a bucket.")
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
// Write success response.
writeSuccessNoContent(w)
}
// ListObjectsV1Handler - GET Bucket (List Objects) Version 1.
// --------------------------
// This implementation of the GET operation returns some or all (up to 1000)
// of the objects in a bucket. You can use the request parameters as selection
// criteria to return a subset of the objects in a bucket.
//
func (api gatewayAPIHandlers) ListObjectsV1Handler(w http.ResponseWriter, r *http.Request) {
vars := router.Vars(r)
bucket := vars["bucket"]
objectAPI := api.ObjectAPI()
if objectAPI == nil {
writeErrorResponse(w, ErrServerNotInitialized, r.URL)
return
}
reqAuthType := getRequestAuthType(r)
switch reqAuthType {
case authTypePresignedV2, authTypeSignedV2:
// Signature V2 validation.
s3Error := isReqAuthenticatedV2(r)
if s3Error != ErrNone {
errorIf(errSignatureMismatch, "%s", dumpRequest(r))
writeErrorResponse(w, s3Error, r.URL)
return
}
case authTypeSigned, authTypePresigned:
s3Error := isReqAuthenticated(r, serverConfig.GetRegion())
if s3Error != ErrNone {
errorIf(errSignatureMismatch, "%s", dumpRequest(r))
writeErrorResponse(w, s3Error, r.URL)
return
}
case authTypeAnonymous:
// No verification needed for anonymous requests.
default:
// For all unknown auth types return error.
writeErrorResponse(w, ErrAccessDenied, r.URL)
return
}
// Extract all the listObjectsV1 query params to their native
// values. N B We delegate validation of params to respective
// gateway backends.
prefix, marker, delimiter, maxKeys, _ := getListObjectsV1Args(r.URL.Query())
// Validate the maxKeys lowerbound. When maxKeys > 1000, S3 returns 1000 but
// does not throw an error.
if maxKeys < 0 {
writeErrorResponse(w, ErrInvalidMaxKeys, r.URL)
return
}
listObjects := objectAPI.ListObjects
if reqAuthType == authTypeAnonymous {
listObjects = objectAPI.AnonListObjects
}
// Inititate a list objects operation based on the input params.
// On success would return back ListObjectsInfo object to be
// marshalled into S3 compatible XML header.
listObjectsInfo, err := listObjects(bucket, prefix, marker, delimiter, maxKeys)
if err != nil {
errorIf(err, "Unable to list objects.")
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
response := generateListObjectsV1Response(bucket, prefix, marker, delimiter, maxKeys, listObjectsInfo)
// Write success response.
writeSuccessResponseXML(w, encodeResponse(response))
}
// ListObjectsV2Handler - GET Bucket (List Objects) Version 2.
// --------------------------
// This implementation of the GET operation returns some or all (up to 1000)
// of the objects in a bucket. You can use the request parameters as selection
// criteria to return a subset of the objects in a bucket.
//
// NOTE: It is recommended that this API to be used for application development.
// Minio continues to support ListObjectsV1 for supporting legacy tools.
func (api gatewayAPIHandlers) ListObjectsV2Handler(w http.ResponseWriter, r *http.Request) {
vars := router.Vars(r)
bucket := vars["bucket"]
objectAPI := api.ObjectAPI()
if objectAPI == nil {
writeErrorResponse(w, ErrServerNotInitialized, r.URL)
return
}
reqAuthType := getRequestAuthType(r)
switch reqAuthType {
case authTypePresignedV2, authTypeSignedV2:
// Signature V2 validation.
s3Error := isReqAuthenticatedV2(r)
if s3Error != ErrNone {
errorIf(errSignatureMismatch, dumpRequest(r))
writeErrorResponse(w, s3Error, r.URL)
return
}
case authTypeSigned, authTypePresigned:
s3Error := isReqAuthenticated(r, serverConfig.GetRegion())
if s3Error != ErrNone {
errorIf(errSignatureMismatch, dumpRequest(r))
writeErrorResponse(w, s3Error, r.URL)
return
}
case authTypeAnonymous:
// No verification needed for anonymous requests.
default:
// For all unknown auth types return error.
writeErrorResponse(w, ErrAccessDenied, r.URL)
return
}
// Extract all the listObjectsV2 query params to their native values.
prefix, token, startAfter, delimiter, fetchOwner, maxKeys, _ := getListObjectsV2Args(r.URL.Query())
// In ListObjectsV2 'continuation-token' is the marker.
marker := token
// Check if 'continuation-token' is empty.
if token == "" {
// Then we need to use 'start-after' as marker instead.
marker = startAfter
}
listObjectsV2 := objectAPI.ListObjectsV2
if reqAuthType == authTypeAnonymous {
listObjectsV2 = objectAPI.AnonListObjectsV2
}
// Validate the query params before beginning to serve the request.
// fetch-owner is not validated since it is a boolean
if s3Error := validateGatewayListObjectsV2Args(prefix, marker, delimiter, maxKeys); s3Error != ErrNone {
writeErrorResponse(w, s3Error, r.URL)
return
}
// Inititate a list objects operation based on the input params.
// On success would return back ListObjectsV2Info object to be
// serialized as XML and sent as S3 compatible response body.
listObjectsV2Info, err := listObjectsV2(bucket, prefix, token, delimiter, maxKeys, fetchOwner, startAfter)
if err != nil {
errorIf(err, "Unable to list objects. Args to listObjectsV2 are bucket=%s, prefix=%s, token=%s, delimiter=%s", bucket, prefix, token, delimiter)
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
response := generateListObjectsV2Response(bucket, prefix, token, listObjectsV2Info.NextContinuationToken, startAfter, delimiter, fetchOwner, listObjectsV2Info.IsTruncated, maxKeys, listObjectsV2Info.Objects, listObjectsV2Info.Prefixes)
// Write success response.
writeSuccessResponseXML(w, encodeResponse(response))
}
// HeadBucketHandler - HEAD Bucket
// ----------
// This operation is useful to determine if a bucket exists.
// The operation returns a 200 OK if the bucket exists and you
// have permission to access it. Otherwise, the operation might
// return responses such as 404 Not Found and 403 Forbidden.
func (api gatewayAPIHandlers) HeadBucketHandler(w http.ResponseWriter, r *http.Request) {
vars := router.Vars(r)
bucket := vars["bucket"]
objectAPI := api.ObjectAPI()
if objectAPI == nil {
writeErrorResponseHeadersOnly(w, ErrServerNotInitialized)
return
}
reqAuthType := getRequestAuthType(r)
switch reqAuthType {
case authTypePresignedV2, authTypeSignedV2:
// Signature V2 validation.
s3Error := isReqAuthenticatedV2(r)
if s3Error != ErrNone {
errorIf(errSignatureMismatch, "%s", dumpRequest(r))
writeErrorResponse(w, s3Error, r.URL)
return
}
case authTypeSigned, authTypePresigned:
s3Error := isReqAuthenticated(r, serverConfig.GetRegion())
if s3Error != ErrNone {
errorIf(errSignatureMismatch, "%s", dumpRequest(r))
writeErrorResponse(w, s3Error, r.URL)
return
}
case authTypeAnonymous:
// No verification needed for anonymous requests.
default:
// For all unknown auth types return error.
writeErrorResponse(w, ErrAccessDenied, r.URL)
return
}
getBucketInfo := objectAPI.GetBucketInfo
if reqAuthType == authTypeAnonymous {
getBucketInfo = objectAPI.AnonGetBucketInfo
}
if _, err := getBucketInfo(bucket); err != nil {
errorIf(err, "Unable to fetch bucket info.")
writeErrorResponseHeadersOnly(w, toAPIErrorCode(err))
return
}
writeSuccessResponseHeadersOnly(w)
}
// GetBucketLocationHandler - GET Bucket location.
// -------------------------
// This operation returns bucket location.
func (api gatewayAPIHandlers) GetBucketLocationHandler(w http.ResponseWriter, r *http.Request) {
vars := router.Vars(r)
bucket := vars["bucket"]
objectAPI := api.ObjectAPI()
if objectAPI == nil {
writeErrorResponse(w, ErrServerNotInitialized, r.URL)
return
}
reqAuthType := getRequestAuthType(r)
switch reqAuthType {
case authTypePresignedV2, authTypeSignedV2:
// Signature V2 validation.
s3Error := isReqAuthenticatedV2(r)
if s3Error != ErrNone {
errorIf(errSignatureMismatch, "%s", dumpRequest(r))
writeErrorResponse(w, s3Error, r.URL)
return
}
case authTypeSigned, authTypePresigned:
s3Error := isReqAuthenticated(r, globalMinioDefaultRegion)
if s3Error == ErrInvalidRegion {
// Clients like boto3 send getBucketLocation() call signed with region that is configured.
s3Error = isReqAuthenticated(r, serverConfig.GetRegion())
}
if s3Error != ErrNone {
errorIf(errSignatureMismatch, "%s", dumpRequest(r))
writeErrorResponse(w, s3Error, r.URL)
return
}
case authTypeAnonymous:
// No verification needed for anonymous requests.
default:
// For all unknown auth types return error.
writeErrorResponse(w, ErrAccessDenied, r.URL)
return
}
getBucketInfo := objectAPI.GetBucketInfo
if reqAuthType == authTypeAnonymous {
getBucketInfo = objectAPI.AnonGetBucketInfo
}
if _, err := getBucketInfo(bucket); err != nil {
errorIf(err, "Unable to fetch bucket info.")
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
// Generate response.
encodedSuccessResponse := encodeResponse(LocationResponse{})
// Get current region.
region := serverConfig.GetRegion()
if region != globalMinioDefaultRegion {
encodedSuccessResponse = encodeResponse(LocationResponse{
Location: region,
})
}
// Write success response.
writeSuccessResponseXML(w, encodedSuccessResponse)
}