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minio/cmd/object-handlers.go

1486 lines
43 KiB

/*
* Minio Cloud Storage, (C) 2015-2018 Minio, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package cmd
import (
"context"
"crypto/hmac"
"encoding/binary"
"encoding/hex"
"encoding/xml"
"fmt"
"io"
goioutil "io/ioutil"
"net"
"net/http"
"net/url"
"sort"
"strconv"
"github.com/gorilla/mux"
"github.com/minio/minio/cmd/logger"
"github.com/minio/minio/pkg/event"
"github.com/minio/minio/pkg/hash"
"github.com/minio/minio/pkg/ioutil"
"github.com/minio/minio/pkg/policy"
sha256 "github.com/minio/sha256-simd"
"github.com/minio/sio"
)
// supportedHeadGetReqParams - supported request parameters for GET and HEAD presigned request.
var supportedHeadGetReqParams = map[string]string{
"response-expires": "Expires",
"response-content-type": "Content-Type",
"response-cache-control": "Cache-Control",
"response-content-encoding": "Content-Encoding",
"response-content-language": "Content-Language",
"response-content-disposition": "Content-Disposition",
}
// setHeadGetRespHeaders - set any requested parameters as response headers.
func setHeadGetRespHeaders(w http.ResponseWriter, reqParams url.Values) {
for k, v := range reqParams {
if header, ok := supportedHeadGetReqParams[k]; ok {
w.Header()[header] = v
}
}
}
// GetObjectHandler - GET Object
// ----------
// This implementation of the GET operation retrieves object. To use GET,
// you must have READ access to the object.
func (api objectAPIHandlers) GetObjectHandler(w http.ResponseWriter, r *http.Request) {
ctx := newContext(r, "GetObject")
var object, bucket string
vars := mux.Vars(r)
bucket = vars["bucket"]
object = vars["object"]
// Fetch object stat info.
objectAPI := api.ObjectAPI()
if objectAPI == nil {
writeErrorResponse(w, ErrServerNotInitialized, r.URL)
return
}
getObjectInfo := objectAPI.GetObjectInfo
if api.CacheAPI() != nil {
getObjectInfo = api.CacheAPI().GetObjectInfo
}
if s3Error := checkRequestAuthType(ctx, r, policy.GetObjectAction, bucket, object); s3Error != ErrNone {
if getRequestAuthType(r) == authTypeAnonymous {
// As per "Permission" section in https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectGET.html
// If the object you request does not exist, the error Amazon S3 returns depends on whether you also have the s3:ListBucket permission.
// * If you have the s3:ListBucket permission on the bucket, Amazon S3 will return an HTTP status code 404 ("no such key") error.
// * if you don’t have the s3:ListBucket permission, Amazon S3 will return an HTTP status code 403 ("access denied") error.`
if globalPolicySys.IsAllowed(policy.Args{
Action: policy.ListBucketAction,
BucketName: bucket,
ConditionValues: getConditionValues(r, ""),
IsOwner: false,
}) {
_, err := getObjectInfo(ctx, bucket, object)
if toAPIErrorCode(err) == ErrNoSuchKey {
s3Error = ErrNoSuchKey
}
}
}
writeErrorResponse(w, s3Error, r.URL)
return
}
objInfo, err := getObjectInfo(ctx, bucket, object)
if err != nil {
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
if objectAPI.IsEncryptionSupported() {
if apiErr, _ := DecryptObjectInfo(&objInfo, r.Header); apiErr != ErrNone {
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.
logger.LogIf(ctx, err)
}
}
// 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()
}
var writer io.Writer
writer = w
if objectAPI.IsEncryptionSupported() {
if hasSSECustomerHeader(r.Header) {
// Response writer should be limited early on for decryption upto required length,
// additionally also skipping mod(offset)64KiB boundaries.
writer = ioutil.LimitedWriter(writer, startOffset%(64*1024), length)
writer, startOffset, length, err = DecryptBlocksRequest(writer, r, startOffset, length, objInfo, false)
if err != nil {
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
w.Header().Set(SSECustomerAlgorithm, r.Header.Get(SSECustomerAlgorithm))
w.Header().Set(SSECustomerKeyMD5, r.Header.Get(SSECustomerKeyMD5))
}
}
setObjectHeaders(w, objInfo, hrange)
setHeadGetRespHeaders(w, r.URL.Query())
httpWriter := ioutil.WriteOnClose(writer)
getObject := objectAPI.GetObject
if api.CacheAPI() != nil && !hasSSECustomerHeader(r.Header) {
getObject = api.CacheAPI().GetObject
}
// Reads the object at startOffset and writes to mw.
if err = getObject(ctx, bucket, object, startOffset, length, httpWriter, objInfo.ETag); err != nil {
if !httpWriter.HasWritten() { // write error response only if no data has been written to client yet
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
}
httpWriter.Close()
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.
sendEvent(eventArgs{
EventName: event.ObjectAccessedGet,
BucketName: bucket,
Object: 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 objectAPIHandlers) HeadObjectHandler(w http.ResponseWriter, r *http.Request) {
ctx := newContext(r, "HeadObject")
var object, bucket string
vars := mux.Vars(r)
bucket = vars["bucket"]
object = vars["object"]
objectAPI := api.ObjectAPI()
if objectAPI == nil {
writeErrorResponseHeadersOnly(w, ErrServerNotInitialized)
return
}
getObjectInfo := objectAPI.GetObjectInfo
if api.CacheAPI() != nil {
getObjectInfo = api.CacheAPI().GetObjectInfo
}
if s3Error := checkRequestAuthType(ctx, r, policy.GetObjectAction, bucket, object); s3Error != ErrNone {
if getRequestAuthType(r) == authTypeAnonymous {
// As per "Permission" section in https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectHEAD.html
// If the object you request does not exist, the error Amazon S3 returns depends on whether you also have the s3:ListBucket permission.
// * If you have the s3:ListBucket permission on the bucket, Amazon S3 will return an HTTP status code 404 ("no such key") error.
// * if you don’t have the s3:ListBucket permission, Amazon S3 will return an HTTP status code 403 ("access denied") error.`
if globalPolicySys.IsAllowed(policy.Args{
Action: policy.ListBucketAction,
BucketName: bucket,
ConditionValues: getConditionValues(r, ""),
IsOwner: false,
}) {
_, err := getObjectInfo(ctx, bucket, object)
if toAPIErrorCode(err) == ErrNoSuchKey {
s3Error = ErrNoSuchKey
}
}
}
writeErrorResponseHeadersOnly(w, s3Error)
return
}
objInfo, err := getObjectInfo(ctx, bucket, object)
if err != nil {
writeErrorResponseHeadersOnly(w, toAPIErrorCode(err))
return
}
if objectAPI.IsEncryptionSupported() {
if apiErr, encrypted := DecryptObjectInfo(&objInfo, r.Header); apiErr != ErrNone {
writeErrorResponse(w, apiErr, r.URL)
return
} else if encrypted {
if _, err = DecryptRequest(w, r, objInfo.UserDefined); err != nil {
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
w.Header().Set(SSECustomerAlgorithm, r.Header.Get(SSECustomerAlgorithm))
w.Header().Set(SSECustomerKeyMD5, r.Header.Get(SSECustomerKeyMD5))
}
}
// 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.
sendEvent(eventArgs{
EventName: event.ObjectAccessedHead,
BucketName: bucket,
Object: objInfo,
ReqParams: extractReqParams(r),
UserAgent: r.UserAgent(),
Host: host,
Port: port,
})
}
// Extract metadata relevant for an CopyObject operation based on conditional
// header values specified in X-Amz-Metadata-Directive.
func getCpObjMetadataFromHeader(ctx context.Context, header http.Header, userMeta map[string]string) (map[string]string, error) {
// Make a copy of the supplied metadata to avoid
// to change the original one.
defaultMeta := make(map[string]string, len(userMeta))
for k, v := range userMeta {
defaultMeta[k] = v
}
// if x-amz-metadata-directive says REPLACE then
// we extract metadata from the input headers.
if isMetadataReplace(header) {
return extractMetadataFromHeader(ctx, header)
}
// if x-amz-metadata-directive says COPY then we
// return the default metadata.
if isMetadataCopy(header) {
return defaultMeta, nil
}
// Copy is default behavior if not x-amz-metadata-directive is set.
return defaultMeta, nil
}
// CopyObjectHandler - Copy Object
// ----------
// This implementation of the PUT operation adds an object to a bucket
// while reading the object from another source.
func (api objectAPIHandlers) CopyObjectHandler(w http.ResponseWriter, r *http.Request) {
ctx := newContext(r, "CopyObject")
vars := mux.Vars(r)
dstBucket := vars["bucket"]
dstObject := vars["object"]
objectAPI := api.ObjectAPI()
if objectAPI == nil {
writeErrorResponse(w, ErrServerNotInitialized, r.URL)
return
}
if s3Error := checkRequestAuthType(ctx, r, policy.PutObjectAction, dstBucket, dstObject); s3Error != ErrNone {
writeErrorResponse(w, s3Error, r.URL)
return
}
// TODO: Reject requests where body/payload is present, for now we don't even read it.
// Copy source path.
cpSrcPath, err := url.QueryUnescape(r.Header.Get("X-Amz-Copy-Source"))
if err != nil {
// Save unescaped string as is.
cpSrcPath = r.Header.Get("X-Amz-Copy-Source")
}
srcBucket, srcObject := path2BucketAndObject(cpSrcPath)
// If source object is empty or bucket is empty, reply back invalid copy source.
if srcObject == "" || srcBucket == "" {
writeErrorResponse(w, ErrInvalidCopySource, r.URL)
return
}
// Check if metadata directive is valid.
if !isMetadataDirectiveValid(r.Header) {
writeErrorResponse(w, ErrInvalidMetadataDirective, r.URL)
return
}
cpSrcDstSame := isStringEqual(pathJoin(srcBucket, srcObject), pathJoin(dstBucket, dstObject))
srcInfo, err := objectAPI.GetObjectInfo(ctx, srcBucket, srcObject)
if err != nil {
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
// Deny if WORM is enabled
if globalWORMEnabled {
if _, err = objectAPI.GetObjectInfo(ctx, dstBucket, dstObject); err == nil {
writeErrorResponse(w, ErrMethodNotAllowed, r.URL)
return
}
}
if objectAPI.IsEncryptionSupported() {
if apiErr, _ := DecryptCopyObjectInfo(&srcInfo, r.Header); apiErr != ErrNone {
writeErrorResponse(w, apiErr, r.URL)
return
}
}
// Verify before x-amz-copy-source preconditions before continuing with CopyObject.
if checkCopyObjectPreconditions(w, r, srcInfo) {
return
}
/// maximum Upload size for object in a single CopyObject operation.
if isMaxObjectSize(srcInfo.Size) {
writeErrorResponse(w, ErrEntityTooLarge, r.URL)
return
}
// Initialize pipe.
pipeReader, pipeWriter := io.Pipe()
// We have to copy metadata only if source and destination are same.
// this changes for encryption which can be observed below.
if cpSrcDstSame {
srcInfo.metadataOnly = true
}
var writer io.WriteCloser = pipeWriter
var reader io.Reader = pipeReader
srcInfo.Reader, err = hash.NewReader(reader, srcInfo.Size, "", "")
if err != nil {
pipeWriter.CloseWithError(err)
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
// Save the original size for later use when we want to copy
// encrypted file into an unencrypted one.
size := srcInfo.Size
var encMetadata = make(map[string]string)
if objectAPI.IsEncryptionSupported() {
var oldKey, newKey []byte
sseCopyC := hasSSECopyCustomerHeader(r.Header)
sseC := hasSSECustomerHeader(r.Header)
if sseC {
newKey, err = ParseSSECustomerRequest(r)
if err != nil {
pipeWriter.CloseWithError(err)
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
}
// AWS S3 implementation requires us to only rotate keys
// when/ both keys are provided and destination is same
// otherwise we proceed to encrypt/decrypt.
if sseCopyC && sseC && cpSrcDstSame {
// Get the old key which needs to be rotated.
oldKey, err = ParseSSECopyCustomerRequest(r)
if err != nil {
pipeWriter.CloseWithError(err)
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
for k, v := range srcInfo.UserDefined {
encMetadata[k] = v
}
if err = rotateKey(oldKey, newKey, encMetadata); err != nil {
pipeWriter.CloseWithError(err)
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
// Since we are rotating the keys, make sure to update the metadata.
srcInfo.metadataOnly = true
} else {
if sseCopyC {
// Source is encrypted make sure to save the encrypted size.
writer = ioutil.LimitedWriter(writer, 0, srcInfo.Size)
writer, srcInfo.Size, err = DecryptAllBlocksCopyRequest(writer, r, srcInfo)
if err != nil {
pipeWriter.CloseWithError(err)
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
// We are not only copying just metadata instead
// we are creating a new object at this point, even
// if source and destination are same objects.
srcInfo.metadataOnly = false
if sseC {
size = srcInfo.Size
}
}
if sseC {
reader, err = newEncryptReader(pipeReader, newKey, encMetadata)
if err != nil {
pipeWriter.CloseWithError(err)
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
// We are not only copying just metadata instead
// we are creating a new object at this point, even
// if source and destination are same objects.
srcInfo.metadataOnly = false
if !sseCopyC {
size = srcInfo.EncryptedSize()
}
}
srcInfo.Reader, err = hash.NewReader(reader, size, "", "") // do not try to verify encrypted content
if err != nil {
pipeWriter.CloseWithError(err)
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
}
}
srcInfo.Writer = writer
srcInfo.UserDefined, err = getCpObjMetadataFromHeader(ctx, r.Header, srcInfo.UserDefined)
if err != nil {
pipeWriter.CloseWithError(err)
writeErrorResponse(w, ErrInternalError, r.URL)
return
}
// We need to preserve the encryption headers set in EncryptRequest,
// so we do not want to override them, copy them instead.
for k, v := range encMetadata {
srcInfo.UserDefined[k] = v
}
// Check if x-amz-metadata-directive was not set to REPLACE and source,
// desination are same objects. Apply this restriction also when
// metadataOnly is true indicating that we are not overwriting the object.
// if encryption is enabled we do not need explicit "REPLACE" metadata to
// be enabled as well - this is to allow for key-rotation.
if !isMetadataReplace(r.Header) && srcInfo.metadataOnly && !srcInfo.IsEncrypted() {
pipeWriter.CloseWithError(fmt.Errorf("invalid copy dest"))
// If x-amz-metadata-directive is not set to REPLACE then we need
// to error out if source and destination are same.
writeErrorResponse(w, ErrInvalidCopyDest, r.URL)
return
}
// Copy source object to destination, if source and destination
// object is same then only metadata is updated.
objInfo, err := objectAPI.CopyObject(ctx, srcBucket, srcObject, dstBucket, dstObject, srcInfo)
if err != nil {
pipeWriter.CloseWithError(err)
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
pipeReader.Close()
response := generateCopyObjectResponse(objInfo.ETag, objInfo.ModTime)
encodedSuccessResponse := encodeResponse(response)
// Write success response.
writeSuccessResponseXML(w, encodedSuccessResponse)
// Get host and port from Request.RemoteAddr.
host, port, err := net.SplitHostPort(r.RemoteAddr)
if err != nil {
host, port = "", ""
}
// Notify object created event.
sendEvent(eventArgs{
EventName: event.ObjectCreatedCopy,
BucketName: dstBucket,
Object: 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 objectAPIHandlers) PutObjectHandler(w http.ResponseWriter, r *http.Request) {
ctx := newContext(r, "PutObject")
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
}
vars := mux.Vars(r)
bucket := vars["bucket"]
object := vars["object"]
// Validate storage class metadata if present
if _, ok := r.Header[amzStorageClassCanonical]; ok {
if !isValidStorageClassMeta(r.Header.Get(amzStorageClassCanonical)) {
writeErrorResponse(w, ErrInvalidStorageClass, r.URL)
return
}
}
// Get Content-Md5 sent by client and verify if valid
md5Bytes, err := checkValidMD5(r.Header)
if err != nil {
writeErrorResponse(w, ErrInvalidDigest, r.URL)
return
}
/// if Content-Length is unknown/missing, deny the request
size := r.ContentLength
rAuthType := getRequestAuthType(r)
if rAuthType == authTypeStreamingSigned {
if sizeStr, ok := r.Header["X-Amz-Decoded-Content-Length"]; ok {
if sizeStr[0] == "" {
writeErrorResponse(w, ErrMissingContentLength, r.URL)
return
}
size, err = strconv.ParseInt(sizeStr[0], 10, 64)
if err != nil {
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(ctx, r.Header)
if err != nil {
writeErrorResponse(w, ErrInternalError, r.URL)
return
}
if rAuthType == 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")
}
}
}
var (
md5hex = hex.EncodeToString(md5Bytes)
sha256hex = ""
reader io.Reader
s3Err APIErrorCode
putObject = objectAPI.PutObject
)
reader = r.Body
switch rAuthType {
default:
// For all unknown auth types return error.
writeErrorResponse(w, ErrAccessDenied, r.URL)
return
case authTypeAnonymous:
if !globalPolicySys.IsAllowed(policy.Args{
Action: policy.PutObjectAction,
BucketName: bucket,
ConditionValues: getConditionValues(r, ""),
IsOwner: false,
ObjectName: object,
}) {
writeErrorResponse(w, ErrAccessDenied, r.URL)
return
}
case authTypeStreamingSigned:
// Initialize stream signature verifier.
reader, s3Err = newSignV4ChunkedReader(r)
if s3Err != ErrNone {
writeErrorResponse(w, s3Err, r.URL)
return
}
case authTypeSignedV2, authTypePresignedV2:
s3Err = isReqAuthenticatedV2(r)
if s3Err != ErrNone {
writeErrorResponse(w, s3Err, r.URL)
return
}
case authTypePresigned, authTypeSigned:
if s3Err = reqSignatureV4Verify(r, globalServerConfig.GetRegion()); s3Err != ErrNone {
writeErrorResponse(w, s3Err, 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
}
// Deny if WORM is enabled
if globalWORMEnabled {
if _, err = objectAPI.GetObjectInfo(ctx, bucket, object); err == nil {
writeErrorResponse(w, ErrMethodNotAllowed, r.URL)
return
}
}
if objectAPI.IsEncryptionSupported() {
if hasSSECustomerHeader(r.Header) && !hasSuffix(object, slashSeparator) { // handle SSE-C requests
reader, err = EncryptRequest(hashReader, r, metadata)
if err != nil {
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
info := ObjectInfo{Size: size}
hashReader, err = hash.NewReader(reader, info.EncryptedSize(), "", "") // do not try to verify encrypted content
if err != nil {
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
}
}
if api.CacheAPI() != nil && !hasSSECustomerHeader(r.Header) {
putObject = api.CacheAPI().PutObject
}
// Create the object..
objInfo, err := putObject(ctx, bucket, object, hashReader, metadata)
if err != nil {
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
w.Header().Set("ETag", "\""+objInfo.ETag+"\"")
if objectAPI.IsEncryptionSupported() {
if hasSSECustomerHeader(r.Header) {
w.Header().Set(SSECustomerAlgorithm, r.Header.Get(SSECustomerAlgorithm))
w.Header().Set(SSECustomerKeyMD5, r.Header.Get(SSECustomerKeyMD5))
}
}
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.
sendEvent(eventArgs{
EventName: event.ObjectCreatedPut,
BucketName: bucket,
Object: objInfo,
ReqParams: extractReqParams(r),
UserAgent: r.UserAgent(),
Host: host,
Port: port,
})
}
/// Multipart objectAPIHandlers
// NewMultipartUploadHandler - New multipart upload.
func (api objectAPIHandlers) NewMultipartUploadHandler(w http.ResponseWriter, r *http.Request) {
ctx := newContext(r, "NewMultipartUpload")
var object, bucket string
vars := mux.Vars(r)
bucket = vars["bucket"]
object = vars["object"]
objectAPI := api.ObjectAPI()
if objectAPI == nil {
writeErrorResponse(w, ErrServerNotInitialized, r.URL)
return
}
if s3Error := checkRequestAuthType(ctx, r, policy.PutObjectAction, bucket, object); s3Error != ErrNone {
writeErrorResponse(w, s3Error, r.URL)
return
}
// Deny if WORM is enabled
if globalWORMEnabled {
if _, err := objectAPI.GetObjectInfo(ctx, bucket, object); err == nil {
writeErrorResponse(w, ErrMethodNotAllowed, r.URL)
return
}
}
// Validate storage class metadata if present
if _, ok := r.Header[amzStorageClassCanonical]; ok {
if !isValidStorageClassMeta(r.Header.Get(amzStorageClassCanonical)) {
writeErrorResponse(w, ErrInvalidStorageClass, r.URL)
return
}
}
var encMetadata = map[string]string{}
if objectAPI.IsEncryptionSupported() {
if hasSSECustomerHeader(r.Header) {
key, err := ParseSSECustomerRequest(r)
if err != nil {
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
_, err = newEncryptMetadata(key, encMetadata)
if err != nil {
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
// Set this for multipart only operations, we need to differentiate during
// decryption if the file was actually multipart or not.
encMetadata[ReservedMetadataPrefix+"Encrypted-Multipart"] = ""
}
}
// Extract metadata that needs to be saved.
metadata, err := extractMetadataFromHeader(ctx, r.Header)
if err != nil {
writeErrorResponse(w, ErrInternalError, r.URL)
return
}
// We need to preserve the encryption headers set in EncryptRequest,
// so we do not want to override them, copy them instead.
for k, v := range encMetadata {
metadata[k] = v
}
newMultipartUpload := objectAPI.NewMultipartUpload
if api.CacheAPI() != nil {
newMultipartUpload = api.CacheAPI().NewMultipartUpload
}
uploadID, err := newMultipartUpload(ctx, bucket, object, metadata)
if err != nil {
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
response := generateInitiateMultipartUploadResponse(bucket, object, uploadID)
encodedSuccessResponse := encodeResponse(response)
// Write success response.
writeSuccessResponseXML(w, encodedSuccessResponse)
}
// CopyObjectPartHandler - uploads a part by copying data from an existing object as data source.
func (api objectAPIHandlers) CopyObjectPartHandler(w http.ResponseWriter, r *http.Request) {
ctx := newContext(r, "CopyObjectPart")
vars := mux.Vars(r)
dstBucket := vars["bucket"]
dstObject := vars["object"]
objectAPI := api.ObjectAPI()
if objectAPI == nil {
writeErrorResponse(w, ErrServerNotInitialized, r.URL)
return
}
if s3Error := checkRequestAuthType(ctx, r, policy.PutObjectAction, dstBucket, dstObject); s3Error != ErrNone {
writeErrorResponse(w, s3Error, r.URL)
return
}
// Copy source path.
cpSrcPath, err := url.QueryUnescape(r.Header.Get("X-Amz-Copy-Source"))
if err != nil {
// Save unescaped string as is.
cpSrcPath = r.Header.Get("X-Amz-Copy-Source")
}
srcBucket, srcObject := path2BucketAndObject(cpSrcPath)
// If source object is empty or bucket is empty, reply back invalid copy source.
if srcObject == "" || srcBucket == "" {
writeErrorResponse(w, ErrInvalidCopySource, r.URL)
return
}
uploadID := r.URL.Query().Get("uploadId")
partIDString := r.URL.Query().Get("partNumber")
partID, err := strconv.Atoi(partIDString)
if err != nil {
writeErrorResponse(w, ErrInvalidPart, r.URL)
return
}
// check partID with maximum part ID for multipart objects
if isMaxPartID(partID) {
writeErrorResponse(w, ErrInvalidMaxParts, r.URL)
return
}
srcInfo, err := objectAPI.GetObjectInfo(ctx, srcBucket, srcObject)
if err != nil {
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
// Deny if WORM is enabled
if globalWORMEnabled {
if _, err = objectAPI.GetObjectInfo(ctx, dstBucket, dstObject); err == nil {
writeErrorResponse(w, ErrMethodNotAllowed, r.URL)
return
}
}
if objectAPI.IsEncryptionSupported() {
if apiErr, _ := DecryptCopyObjectInfo(&srcInfo, r.Header); apiErr != ErrNone {
writeErrorResponse(w, apiErr, r.URL)
return
}
}
// Get request range.
var hrange *httpRange
rangeHeader := r.Header.Get("x-amz-copy-source-range")
if rangeHeader != "" {
if hrange, err = parseCopyPartRange(rangeHeader, srcInfo.Size); err != nil {
// Handle only errInvalidRange
// Ignore other parse error and treat it as regular Get request like Amazon S3.
logger.GetReqInfo(ctx).AppendTags("rangeHeader", rangeHeader)
logger.LogIf(ctx, err)
writeCopyPartErr(w, err, r.URL)
return
}
}
// Verify before x-amz-copy-source preconditions before continuing with CopyObject.
if checkCopyObjectPartPreconditions(w, r, srcInfo) {
return
}
// Get the object.
var startOffset int64
length := srcInfo.Size
if hrange != nil {
length = hrange.getLength()
startOffset = hrange.offsetBegin
}
/// maximum copy size for multipart objects in a single operation
if isMaxAllowedPartSize(length) {
writeErrorResponse(w, ErrEntityTooLarge, r.URL)
return
}
// Initialize pipe.
pipeReader, pipeWriter := io.Pipe()
var writer io.WriteCloser = pipeWriter
var reader io.Reader = pipeReader
srcInfo.Reader, err = hash.NewReader(reader, length, "", "")
if err != nil {
pipeWriter.CloseWithError(err)
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
if objectAPI.IsEncryptionSupported() {
var li ListPartsInfo
li, err = objectAPI.ListObjectParts(ctx, dstBucket, dstObject, uploadID, 0, 1)
if err != nil {
pipeWriter.CloseWithError(err)
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
sseCopyC := hasSSECopyCustomerHeader(r.Header)
if sseCopyC {
// Response writer should be limited early on for decryption upto required length,
// additionally also skipping mod(offset)64KiB boundaries.
writer = ioutil.LimitedWriter(writer, startOffset%(64*1024), length)
writer, startOffset, length, err = DecryptBlocksRequest(pipeWriter, r, startOffset, length, srcInfo, true)
if err != nil {
pipeWriter.CloseWithError(err)
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
}
if li.IsEncrypted() {
if !hasSSECustomerHeader(r.Header) {
writeErrorResponse(w, ErrSSEMultipartEncrypted, r.URL)
return
}
var key []byte
key, err = ParseSSECustomerRequest(r)
if err != nil {
pipeWriter.CloseWithError(err)
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
// Calculating object encryption key
var objectEncryptionKey []byte
objectEncryptionKey, err = decryptObjectInfo(key, li.UserDefined)
if err != nil {
pipeWriter.CloseWithError(err)
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
reader, err = sio.EncryptReader(pipeReader, sio.Config{Key: objectEncryptionKey})
if err != nil {
pipeWriter.CloseWithError(err)
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
size := length
if !sseCopyC {
info := ObjectInfo{Size: length}
size = info.EncryptedSize()
}
srcInfo.Reader, err = hash.NewReader(reader, size, "", "")
if err != nil {
pipeWriter.CloseWithError(err)
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
}
}
srcInfo.Writer = writer
// Copy source object to destination, if source and destination
// object is same then only metadata is updated.
partInfo, err := objectAPI.CopyObjectPart(ctx, srcBucket, srcObject, dstBucket,
dstObject, uploadID, partID, startOffset, length, srcInfo)
if err != nil {
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
// Close the pipe after successful operation.
pipeReader.Close()
response := generateCopyObjectPartResponse(partInfo.ETag, partInfo.LastModified)
encodedSuccessResponse := encodeResponse(response)
// Write success response.
writeSuccessResponseXML(w, encodedSuccessResponse)
}
// PutObjectPartHandler - uploads an incoming part for an ongoing multipart operation.
func (api objectAPIHandlers) PutObjectPartHandler(w http.ResponseWriter, r *http.Request) {
ctx := newContext(r, "PutObjectPart")
vars := mux.Vars(r)
bucket := vars["bucket"]
object := vars["object"]
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
}
// get Content-Md5 sent by client and verify if valid
md5Bytes, err := checkValidMD5(r.Header)
if err != nil {
writeErrorResponse(w, ErrInvalidDigest, r.URL)
return
}
/// if Content-Length is unknown/missing, throw away
size := r.ContentLength
rAuthType := getRequestAuthType(r)
// For auth type streaming signature, we need to gather a different content length.
if rAuthType == authTypeStreamingSigned {
if sizeStr, ok := r.Header["X-Amz-Decoded-Content-Length"]; ok {
if sizeStr[0] == "" {
writeErrorResponse(w, ErrMissingContentLength, r.URL)
return
}
size, err = strconv.ParseInt(sizeStr[0], 10, 64)
if err != nil {
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
}
}
if size == -1 {
writeErrorResponse(w, ErrMissingContentLength, r.URL)
return
}
/// maximum Upload size for multipart objects in a single operation
if isMaxAllowedPartSize(size) {
writeErrorResponse(w, ErrEntityTooLarge, r.URL)
return
}
uploadID := r.URL.Query().Get("uploadId")
partIDString := r.URL.Query().Get("partNumber")
partID, err := strconv.Atoi(partIDString)
if err != nil {
writeErrorResponse(w, ErrInvalidPart, r.URL)
return
}
// check partID with maximum part ID for multipart objects
if isMaxPartID(partID) {
writeErrorResponse(w, ErrInvalidMaxParts, r.URL)
return
}
var (
md5hex = hex.EncodeToString(md5Bytes)
sha256hex = ""
reader io.Reader
)
reader = r.Body
switch rAuthType {
default:
// For all unknown auth types return error.
writeErrorResponse(w, ErrAccessDenied, r.URL)
return
case authTypeAnonymous:
if !globalPolicySys.IsAllowed(policy.Args{
Action: policy.PutObjectAction,
BucketName: bucket,
ConditionValues: getConditionValues(r, ""),
IsOwner: false,
ObjectName: object,
}) {
writeErrorResponse(w, ErrAccessDenied, r.URL)
return
}
case authTypeStreamingSigned:
// Initialize stream signature verifier.
var s3Error APIErrorCode
reader, s3Error = newSignV4ChunkedReader(r)
if s3Error != ErrNone {
writeErrorResponse(w, s3Error, r.URL)
return
}
case authTypeSignedV2, authTypePresignedV2:
s3Error := isReqAuthenticatedV2(r)
if s3Error != ErrNone {
writeErrorResponse(w, s3Error, r.URL)
return
}
case authTypePresigned, authTypeSigned:
if s3Error := reqSignatureV4Verify(r, globalServerConfig.GetRegion()); s3Error != ErrNone {
writeErrorResponse(w, s3Error, r.URL)
return
}
if !skipContentSha256Cksum(r) {
sha256hex = getContentSha256Cksum(r)
}
}
hashReader, err := hash.NewReader(reader, size, md5hex, sha256hex)
if err != nil {
// Verify if the underlying error is signature mismatch.
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
// Deny if WORM is enabled
if globalWORMEnabled {
if _, err = objectAPI.GetObjectInfo(ctx, bucket, object); err == nil {
writeErrorResponse(w, ErrMethodNotAllowed, r.URL)
return
}
}
if objectAPI.IsEncryptionSupported() {
var li ListPartsInfo
li, err = objectAPI.ListObjectParts(ctx, bucket, object, uploadID, 0, 1)
if err != nil {
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
if li.IsEncrypted() {
if !hasSSECustomerHeader(r.Header) {
writeErrorResponse(w, ErrSSEMultipartEncrypted, r.URL)
return
}
var key []byte
key, err = ParseSSECustomerRequest(r)
if err != nil {
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
// Calculating object encryption key
var objectEncryptionKey []byte
objectEncryptionKey, err = decryptObjectInfo(key, li.UserDefined)
if err != nil {
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
var partIDbin [4]byte
binary.LittleEndian.PutUint32(partIDbin[:], uint32(partID)) // marshal part ID
mac := hmac.New(sha256.New, objectEncryptionKey) // derive part encryption key from part ID and object key
mac.Write(partIDbin[:])
partEncryptionKey := mac.Sum(nil)
reader, err = sio.EncryptReader(reader, sio.Config{Key: partEncryptionKey})
if err != nil {
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
info := ObjectInfo{Size: size}
hashReader, err = hash.NewReader(reader, info.EncryptedSize(), "", "") // do not try to verify encrypted content
if err != nil {
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
}
}
putObjectPart := objectAPI.PutObjectPart
if api.CacheAPI() != nil {
putObjectPart = api.CacheAPI().PutObjectPart
}
partInfo, err := putObjectPart(ctx, bucket, object, uploadID, partID, hashReader)
if err != nil {
// Verify if the underlying error is signature mismatch.
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
if partInfo.ETag != "" {
w.Header().Set("ETag", "\""+partInfo.ETag+"\"")
}
writeSuccessResponseHeadersOnly(w)
}
// AbortMultipartUploadHandler - Abort multipart upload
func (api objectAPIHandlers) AbortMultipartUploadHandler(w http.ResponseWriter, r *http.Request) {
ctx := newContext(r, "AbortMultipartUpload")
vars := mux.Vars(r)
bucket := vars["bucket"]
object := vars["object"]
objectAPI := api.ObjectAPI()
if objectAPI == nil {
writeErrorResponse(w, ErrServerNotInitialized, r.URL)
return
}
abortMultipartUpload := objectAPI.AbortMultipartUpload
if api.CacheAPI() != nil {
abortMultipartUpload = api.CacheAPI().AbortMultipartUpload
}
if s3Error := checkRequestAuthType(ctx, r, policy.AbortMultipartUploadAction, bucket, object); s3Error != ErrNone {
writeErrorResponse(w, s3Error, r.URL)
return
}
// Deny if WORM is enabled
if globalWORMEnabled {
if _, err := objectAPI.GetObjectInfo(ctx, bucket, object); err == nil {
writeErrorResponse(w, ErrMethodNotAllowed, r.URL)
return
}
}
uploadID, _, _, _ := getObjectResources(r.URL.Query())
if err := abortMultipartUpload(ctx, bucket, object, uploadID); err != nil {
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
writeSuccessNoContent(w)
}
// ListObjectPartsHandler - List object parts
func (api objectAPIHandlers) ListObjectPartsHandler(w http.ResponseWriter, r *http.Request) {
ctx := newContext(r, "ListObjectParts")
vars := mux.Vars(r)
bucket := vars["bucket"]
object := vars["object"]
objectAPI := api.ObjectAPI()
if objectAPI == nil {
writeErrorResponse(w, ErrServerNotInitialized, r.URL)
return
}
if s3Error := checkRequestAuthType(ctx, r, policy.ListMultipartUploadPartsAction, bucket, object); s3Error != ErrNone {
writeErrorResponse(w, s3Error, r.URL)
return
}
uploadID, partNumberMarker, maxParts, _ := getObjectResources(r.URL.Query())
if partNumberMarker < 0 {
writeErrorResponse(w, ErrInvalidPartNumberMarker, r.URL)
return
}
if maxParts < 0 {
writeErrorResponse(w, ErrInvalidMaxParts, r.URL)
return
}
listPartsInfo, err := objectAPI.ListObjectParts(ctx, bucket, object, uploadID, partNumberMarker, maxParts)
if err != nil {
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
response := generateListPartsResponse(listPartsInfo)
encodedSuccessResponse := encodeResponse(response)
// Write success response.
writeSuccessResponseXML(w, encodedSuccessResponse)
}
// CompleteMultipartUploadHandler - Complete multipart upload.
func (api objectAPIHandlers) CompleteMultipartUploadHandler(w http.ResponseWriter, r *http.Request) {
ctx := newContext(r, "CompleteMultipartUpload")
vars := mux.Vars(r)
bucket := vars["bucket"]
object := vars["object"]
objectAPI := api.ObjectAPI()
if objectAPI == nil {
writeErrorResponse(w, ErrServerNotInitialized, r.URL)
return
}
if s3Error := checkRequestAuthType(ctx, r, policy.PutObjectAction, bucket, object); s3Error != ErrNone {
writeErrorResponse(w, s3Error, r.URL)
return
}
// Deny if WORM is enabled
if globalWORMEnabled {
if _, err := objectAPI.GetObjectInfo(ctx, bucket, object); err == nil {
writeErrorResponse(w, ErrMethodNotAllowed, r.URL)
return
}
}
// Get upload id.
uploadID, _, _, _ := getObjectResources(r.URL.Query())
completeMultipartBytes, err := goioutil.ReadAll(r.Body)
if err != nil {
writeErrorResponse(w, ErrInternalError, r.URL)
return
}
complMultipartUpload := &CompleteMultipartUpload{}
if err = xml.Unmarshal(completeMultipartBytes, complMultipartUpload); err != nil {
writeErrorResponse(w, ErrMalformedXML, r.URL)
return
}
if len(complMultipartUpload.Parts) == 0 {
writeErrorResponse(w, ErrMalformedXML, r.URL)
return
}
if !sort.IsSorted(CompletedParts(complMultipartUpload.Parts)) {
writeErrorResponse(w, ErrInvalidPartOrder, r.URL)
return
}
// Complete parts.
var completeParts []CompletePart
for _, part := range complMultipartUpload.Parts {
part.ETag = canonicalizeETag(part.ETag)
completeParts = append(completeParts, part)
}
completeMultiPartUpload := objectAPI.CompleteMultipartUpload
if api.CacheAPI() != nil {
completeMultiPartUpload = api.CacheAPI().CompleteMultipartUpload
}
objInfo, err := completeMultiPartUpload(ctx, bucket, object, uploadID, completeParts)
if err != nil {
switch oErr := err.(type) {
case PartTooSmall:
// Write part too small error.
writePartSmallErrorResponse(w, r, oErr)
default:
// Handle all other generic issues.
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
}
return
}
// Get object location.
location := getObjectLocation(r, globalDomainName, bucket, object)
// Generate complete multipart response.
response := generateCompleteMultpartUploadResponse(bucket, object, location, objInfo.ETag)
encodedSuccessResponse := encodeResponse(response)
if err != nil {
writeErrorResponse(w, ErrInternalError, r.URL)
return
}
// Set etag.
w.Header().Set("ETag", "\""+objInfo.ETag+"\"")
// Write success response.
writeSuccessResponseXML(w, encodedSuccessResponse)
// Get host and port from Request.RemoteAddr.
host, port, err := net.SplitHostPort(r.RemoteAddr)
if err != nil {
host, port = "", ""
}
// Notify object created event.
sendEvent(eventArgs{
EventName: event.ObjectCreatedCompleteMultipartUpload,
BucketName: bucket,
Object: objInfo,
ReqParams: extractReqParams(r),
UserAgent: r.UserAgent(),
Host: host,
Port: port,
})
}
/// Delete objectAPIHandlers
// DeleteObjectHandler - delete an object
func (api objectAPIHandlers) DeleteObjectHandler(w http.ResponseWriter, r *http.Request) {
ctx := newContext(r, "DeleteObject")
vars := mux.Vars(r)
bucket := vars["bucket"]
object := vars["object"]
objectAPI := api.ObjectAPI()
if objectAPI == nil {
writeErrorResponse(w, ErrServerNotInitialized, r.URL)
return
}
if s3Error := checkRequestAuthType(ctx, r, policy.DeleteObjectAction, bucket, object); s3Error != ErrNone {
writeErrorResponse(w, s3Error, r.URL)
return
}
// Deny if WORM is enabled
if globalWORMEnabled {
// Not required to check whether given object exists or not, because
// DeleteObject is always successful irrespective of object existence.
writeErrorResponse(w, ErrMethodNotAllowed, r.URL)
return
}
// http://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectDELETE.html
// Ignore delete object errors while replying to client, since we are
// suppposed to reply only 204. Additionally log the error for
// investigation.
deleteObject(ctx, objectAPI, api.CacheAPI(), bucket, object, r)
writeSuccessNoContent(w)
}