minio/cmd/object-handlers.go
A. Elleuch 6f7ace3d3e Honor overriding response headers for HEAD (#4784)
Though not clearly mentioned in S3 specification, we should override
response headers for presigned HEAD requests as we do for GET.
2017-08-08 11:04:04 -07:00

1061 lines
32 KiB
Go

/*
* Minio Cloud Storage, (C) 2015 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 (
"encoding/hex"
"encoding/xml"
"io/ioutil"
"net"
"net/http"
"net/url"
"sort"
"strconv"
mux "github.com/gorilla/mux"
)
// 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
}
}
}
// getSourceIPAddress - get the source ip address of the request.
func getSourceIPAddress(r *http.Request) string {
var ip string
// Attempt to get ip from standard headers.
// Do not support X-Forwarded-For because it is easy to spoof.
ip = r.Header.Get("X-Real-Ip")
parsedIP := net.ParseIP(ip)
// Skip non valid IP address.
if parsedIP != nil {
return ip
}
// Default to remote address if headers not set.
ip, _, _ = net.SplitHostPort(r.RemoteAddr)
return ip
}
// errAllowableNotFound - For an anon user, return 404 if have ListBucket, 403 otherwise
// this is in keeping with the permissions sections of the docs of both:
// HEAD Object: http://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectHEAD.html
// GET Object: http://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectGET.html
func errAllowableObjectNotFound(bucket string, r *http.Request) APIErrorCode {
if getRequestAuthType(r) == authTypeAnonymous {
// We care about the bucket as a whole, not a particular resource.
resource := "/" + bucket
sourceIP := getSourceIPAddress(r)
if s3Error := enforceBucketPolicy(bucket, "s3:ListBucket", resource,
r.Referer(), sourceIP, r.URL.Query()); s3Error != ErrNone {
return ErrAccessDenied
}
}
return ErrNoSuchKey
}
// Simple way to convert a func to io.Writer type.
type funcToWriter func([]byte) (int, error)
func (f funcToWriter) Write(p []byte) (int, error) {
return f(p)
}
// 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) {
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
}
if s3Error := checkRequestAuthType(r, bucket, "s3:GetObject", serverConfig.GetRegion()); s3Error != ErrNone {
writeErrorResponse(w, s3Error, r.URL)
return
}
// Lock the object before reading.
objectLock := globalNSMutex.NewNSLock(bucket, object)
objectLock.RLock()
defer objectLock.RUnlock()
objInfo, err := objectAPI.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()
}
// Indicates if any data was written to the http.ResponseWriter
dataWritten := false
// io.Writer type which keeps track if any data was written.
writer := funcToWriter(func(p []byte) (int, error) {
if !dataWritten {
// Set headers on the first write.
// Set standard object headers.
setObjectHeaders(w, objInfo, hrange)
// Set any additional requested response headers.
setHeadGetRespHeaders(w, r.URL.Query())
dataWritten = true
}
return w.Write(p)
})
// Reads the object at startOffset and writes to mw.
if err = objectAPI.GetObject(bucket, object, startOffset, length, writer); err != nil {
errorIf(err, "Unable to write to client.")
if !dataWritten {
// 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 !dataWritten {
// If ObjectAPI.GetObject did not return error and no data has
// been written it would mean that it is a 0-byte object.
// call wrter.Write(nil) to set appropriate headers.
writer.Write(nil)
}
// 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,
})
}
// 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) {
var object, bucket string
vars := mux.Vars(r)
bucket = vars["bucket"]
object = vars["object"]
objectAPI := api.ObjectAPI()
if objectAPI == nil {
writeErrorResponseHeadersOnly(w, ErrServerNotInitialized)
return
}
if s3Error := checkRequestAuthType(r, bucket, "s3:GetObject", serverConfig.GetRegion()); s3Error != ErrNone {
writeErrorResponseHeadersOnly(w, s3Error)
return
}
// Lock the object before reading.
objectLock := globalNSMutex.NewNSLock(bucket, object)
objectLock.RLock()
defer objectLock.RUnlock()
objInfo, err := objectAPI.GetObjectInfo(bucket, object)
if err != nil {
errorIf(err, "Unable to fetch object info.")
apiErr := toAPIErrorCode(err)
if apiErr == ErrNoSuchKey {
apiErr = errAllowableObjectNotFound(bucket, r)
}
writeErrorResponseHeadersOnly(w, apiErr)
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,
})
}
// Extract metadata relevant for an CopyObject operation based on conditional
// header values specified in X-Amz-Metadata-Directive.
func getCpObjMetadataFromHeader(header http.Header, defaultMeta map[string]string) (map[string]string, error) {
// if x-amz-metadata-directive says REPLACE then
// we extract metadata from the input headers.
if isMetadataReplace(header) {
return extractMetadataFromHeader(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) {
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(r, dstBucket, "s3:PutObject", serverConfig.GetRegion()); 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 := srcBucket == dstBucket && srcObject == dstObject
// Hold write lock on destination since in both cases
// - if source and destination are same
// - if source and destination are different
// it is the sole mutating state.
objectDWLock := globalNSMutex.NewNSLock(dstBucket, dstObject)
objectDWLock.Lock()
defer objectDWLock.Unlock()
// if source and destination are different, we have to hold
// additional read lock as well to protect against writes on
// source.
if !cpSrcDstSame {
// Hold read locks on source object only if we are
// going to read data from source object.
objectSRLock := globalNSMutex.NewNSLock(srcBucket, srcObject)
objectSRLock.RLock()
defer objectSRLock.RUnlock()
}
objInfo, err := objectAPI.GetObjectInfo(srcBucket, srcObject)
if err != nil {
errorIf(err, "Unable to fetch object info.")
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
// Verify before x-amz-copy-source preconditions before continuing with CopyObject.
if checkCopyObjectPreconditions(w, r, objInfo) {
return
}
/// maximum Upload size for object in a single CopyObject operation.
if isMaxObjectSize(objInfo.Size) {
writeErrorResponse(w, ErrEntityTooLarge, r.URL)
return
}
defaultMeta := objInfo.UserDefined
// Make sure to remove saved etag, CopyObject calculates a new one.
delete(defaultMeta, "etag")
newMetadata, err := getCpObjMetadataFromHeader(r.Header, defaultMeta)
if err != nil {
errorIf(err, "found invalid http request header")
writeErrorResponse(w, ErrInternalError, r.URL)
}
// Check if x-amz-metadata-directive was not set to REPLACE and source,
// desination are same objects.
if !isMetadataReplace(r.Header) && cpSrcDstSame {
// 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(srcBucket, srcObject, dstBucket, dstObject, newMetadata)
if err != nil {
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
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.
eventNotify(eventData{
Type: ObjectCreatedCopy,
Bucket: dstBucket,
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 objectAPIHandlers) 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
}
vars := mux.Vars(r)
bucket := vars["bucket"]
object := vars["object"]
// 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
rAuthType := getRequestAuthType(r)
if rAuthType == 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 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")
}
}
}
// Make sure we hex encode md5sum here.
metadata["etag"] = hex.EncodeToString(md5Bytes)
sha256sum := ""
// Lock the object.
objectLock := globalNSMutex.NewNSLock(bucket, object)
objectLock.Lock()
defer objectLock.Unlock()
var objInfo ObjectInfo
switch rAuthType {
default:
// For all unknown auth types return error.
writeErrorResponse(w, ErrAccessDenied, r.URL)
return
case authTypeAnonymous:
// http://docs.aws.amazon.com/AmazonS3/latest/dev/using-with-s3-actions.html
sourceIP := getSourceIPAddress(r)
if s3Error := enforceBucketPolicy(bucket, "s3:PutObject", r.URL.Path,
r.Referer(), sourceIP, r.URL.Query()); s3Error != ErrNone {
writeErrorResponse(w, s3Error, r.URL)
return
}
// Create anonymous object.
objInfo, err = objectAPI.PutObject(bucket, object, size, r.Body, metadata, sha256sum)
case authTypeStreamingSigned:
// Initialize stream signature verifier.
reader, s3Error := newSignV4ChunkedReader(r)
if s3Error != ErrNone {
errorIf(errSignatureMismatch, "%s", dumpRequest(r))
writeErrorResponse(w, s3Error, r.URL)
return
}
objInfo, err = objectAPI.PutObject(bucket, object, size, reader, metadata, sha256sum)
case authTypeSignedV2, authTypePresignedV2:
s3Error := isReqAuthenticatedV2(r)
if s3Error != ErrNone {
errorIf(errSignatureMismatch, "%s", dumpRequest(r))
writeErrorResponse(w, s3Error, r.URL)
return
}
objInfo, err = objectAPI.PutObject(bucket, object, size, r.Body, metadata, sha256sum)
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) {
sha256sum = r.Header.Get("X-Amz-Content-Sha256")
}
// Create object.
objInfo, err = objectAPI.PutObject(bucket, object, size, r.Body, metadata, sha256sum)
}
if err != nil {
errorIf(err, "Unable to create 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,
})
}
/// Multipart objectAPIHandlers
// NewMultipartUploadHandler - New multipart upload.
func (api objectAPIHandlers) NewMultipartUploadHandler(w http.ResponseWriter, r *http.Request) {
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(r, bucket, "s3:PutObject", serverConfig.GetRegion()); s3Error != ErrNone {
writeErrorResponse(w, s3Error, r.URL)
return
}
// Extract metadata that needs to be saved.
metadata, err := extractMetadataFromHeader(r.Header)
if err != nil {
errorIf(err, "found invalid http request header")
writeErrorResponse(w, ErrInternalError, r.URL)
return
}
uploadID, err := objectAPI.NewMultipartUpload(bucket, object, metadata)
if err != nil {
errorIf(err, "Unable to initiate new multipart upload id.")
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) {
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(r, dstBucket, "s3:PutObject", serverConfig.GetRegion()); 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
}
// Hold read locks on source object only if we are
// going to read data from source object.
objectSRLock := globalNSMutex.NewNSLock(srcBucket, srcObject)
objectSRLock.RLock()
defer objectSRLock.RUnlock()
objInfo, err := objectAPI.GetObjectInfo(srcBucket, srcObject)
if err != nil {
errorIf(err, "Unable to fetch object info.")
writeErrorResponse(w, toAPIErrorCode(err), 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, objInfo.Size); err != nil {
// Handle only errInvalidRange
// Ignore other parse error and treat it as regular Get request like Amazon S3.
errorIf(err, "Unable to extract range %s", rangeHeader)
writeCopyPartErr(w, err, r.URL)
return
}
}
// Verify before x-amz-copy-source preconditions before continuing with CopyObject.
if checkCopyObjectPartPreconditions(w, r, objInfo) {
return
}
// Get the object.
var startOffset int64
length := objInfo.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
}
// Copy source object to destination, if source and destination
// object is same then only metadata is updated.
partInfo, err := objectAPI.CopyObjectPart(srcBucket, srcObject, dstBucket, dstObject, uploadID, partID, startOffset, length)
if err != nil {
errorIf(err, "Unable to perform CopyObjectPart %s/%s", srcBucket, srcObject)
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
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) {
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.Get("Content-Md5"))
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 {
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 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 partInfo PartInfo
incomingMD5 := hex.EncodeToString(md5Bytes)
sha256sum := ""
switch rAuthType {
default:
// For all unknown auth types return error.
writeErrorResponse(w, ErrAccessDenied, r.URL)
return
case authTypeAnonymous:
// http://docs.aws.amazon.com/AmazonS3/latest/dev/mpuAndPermissions.html
sourceIP := getSourceIPAddress(r)
if s3Error := enforceBucketPolicy(bucket, "s3:PutObject", r.URL.Path,
r.Referer(), sourceIP, r.URL.Query()); s3Error != ErrNone {
writeErrorResponse(w, s3Error, r.URL)
return
}
// No need to verify signature, anonymous request access is already allowed.
partInfo, err = objectAPI.PutObjectPart(bucket, object, uploadID, partID, size, r.Body, incomingMD5, sha256sum)
case authTypeStreamingSigned:
// Initialize stream signature verifier.
reader, s3Error := newSignV4ChunkedReader(r)
if s3Error != ErrNone {
errorIf(errSignatureMismatch, "%s", dumpRequest(r))
writeErrorResponse(w, s3Error, r.URL)
return
}
partInfo, err = objectAPI.PutObjectPart(bucket, object, uploadID, partID, size, reader, incomingMD5, sha256sum)
case authTypeSignedV2, authTypePresignedV2:
s3Error := isReqAuthenticatedV2(r)
if s3Error != ErrNone {
errorIf(errSignatureMismatch, "%s", dumpRequest(r))
writeErrorResponse(w, s3Error, r.URL)
return
}
partInfo, err = objectAPI.PutObjectPart(bucket, object, uploadID, partID, size, r.Body, incomingMD5, sha256sum)
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) {
sha256sum = r.Header.Get("X-Amz-Content-Sha256")
}
partInfo, err = objectAPI.PutObjectPart(bucket, object, uploadID, partID, size, r.Body, incomingMD5, sha256sum)
}
if err != nil {
errorIf(err, "Unable to create object part.")
// 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) {
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(r, bucket, "s3:AbortMultipartUpload", serverConfig.GetRegion()); s3Error != ErrNone {
writeErrorResponse(w, s3Error, r.URL)
return
}
uploadID, _, _, _ := getObjectResources(r.URL.Query())
if err := objectAPI.AbortMultipartUpload(bucket, object, uploadID); err != nil {
errorIf(err, "Unable to abort multipart upload.")
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
return
}
writeSuccessNoContent(w)
}
// ListObjectPartsHandler - List object parts
func (api objectAPIHandlers) ListObjectPartsHandler(w http.ResponseWriter, r *http.Request) {
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(r, bucket, "s3:ListMultipartUploadParts", serverConfig.GetRegion()); 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(bucket, object, uploadID, partNumberMarker, maxParts)
if err != nil {
errorIf(err, "Unable to list uploaded parts.")
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) {
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(r, bucket, "s3:PutObject", serverConfig.GetRegion()); s3Error != ErrNone {
writeErrorResponse(w, s3Error, r.URL)
return
}
// Get upload id.
uploadID, _, _, _ := getObjectResources(r.URL.Query())
completeMultipartBytes, err := ioutil.ReadAll(r.Body)
if err != nil {
errorIf(err, "Unable to complete multipart upload.")
writeErrorResponse(w, ErrInternalError, r.URL)
return
}
complMultipartUpload := &completeMultipartUpload{}
if err = xml.Unmarshal(completeMultipartBytes, complMultipartUpload); err != nil {
errorIf(err, "Unable to parse complete multipart upload XML.")
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)
}
// Hold write lock on the object.
destLock := globalNSMutex.NewNSLock(bucket, object)
destLock.Lock()
defer destLock.Unlock()
objInfo, err := objectAPI.CompleteMultipartUpload(bucket, object, uploadID, completeParts)
if err != nil {
errorIf(err, "Unable to complete multipart upload.")
err = errorCause(err)
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 := getLocation(r)
// Generate complete multipart response.
response := generateCompleteMultpartUploadResponse(bucket, object, location, objInfo.ETag)
encodedSuccessResponse := encodeResponse(response)
if err != nil {
errorIf(err, "Unable to parse CompleteMultipartUpload response")
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.
eventNotify(eventData{
Type: ObjectCreatedCompleteMultipartUpload,
Bucket: bucket,
ObjInfo: 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) {
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(r, bucket, "s3:DeleteObject", serverConfig.GetRegion()); s3Error != ErrNone {
writeErrorResponse(w, s3Error, 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.
if err := deleteObject(objectAPI, bucket, object, r); err != nil {
errorIf(err, "Unable to delete an object %s", pathJoin(bucket, object))
}
writeSuccessNoContent(w)
}