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Copy pathobject-handlers.go
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1040 lines (957 loc) · 32.4 KB
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/*
* 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 main
import (
"crypto/sha256"
"encoding/hex"
"encoding/xml"
"fmt"
"io"
"io/ioutil"
"net/http"
"net/url"
"sort"
"strconv"
"strings"
"sync"
"time"
mux "github.com/gorilla/mux"
)
// supportedGetReqParams - supported request parameters for GET presigned request.
var supportedGetReqParams = map[string]string{
"response-expires": "Expires",
"response-content-type": "Content-Type",
"response-cache-control": "Cache-Control",
"response-content-disposition": "Content-Disposition",
}
// setGetRespHeaders - set any requested parameters as response headers.
func setGetRespHeaders(w http.ResponseWriter, reqParams url.Values) {
for k, v := range reqParams {
if header, ok := supportedGetReqParams[k]; ok {
w.Header()[header] = v
}
}
}
// 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
url := *r.URL
url.Path = "/" + bucket
if s3Error := enforceBucketPolicy("s3:ListBucket", bucket, &url); s3Error != ErrNone {
return ErrAccessDenied
}
}
return ErrNoSuchKey
}
// GetObjectHandler - GET Object
// ----------
// This implementation of the GET operation retrieves object
8000
. 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"]
switch getRequestAuthType(r) {
default:
// For all unknown auth types return error.
writeErrorResponse(w, r, ErrAccessDenied, r.URL.Path)
return
case authTypeAnonymous:
// http://docs.aws.amazon.com/AmazonS3/latest/dev/using-with-s3-actions.html
if s3Error := enforceBucketPolicy("s3:GetObject", bucket, r.URL); s3Error != ErrNone {
writeErrorResponse(w, r, s3Error, r.URL.Path)
return
}
case authTypePresigned, authTypeSigned:
if s3Error := isReqAuthenticated(r); s3Error != ErrNone {
writeErrorResponse(w, r, s3Error, r.URL.Path)
return
}
}
// Fetch object stat info.
objInfo, err := api.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, r, apiErr, r.URL.Path)
return
}
var hrange *httpRange
hrange, err = getRequestedRange(r.Header.Get("Range"), objInfo.Size)
if err != nil {
writeErrorResponse(w, r, ErrInvalidRange, r.URL.Path)
return
}
// Set standard object headers.
setObjectHeaders(w, objInfo, hrange)
// Set any additional requested response headers.
setGetRespHeaders(w, r.URL.Query())
// Verify 'If-Modified-Since' and 'If-Unmodified-Since'.
lastModified := objInfo.ModTime
if checkLastModified(w, r, lastModified) {
return
}
// Verify 'If-Match' and 'If-None-Match'.
if checkETag(w, r) {
return
}
// Get the object.
startOffset := hrange.start
length := hrange.length
if length == 0 {
length = objInfo.Size - startOffset
}
if err := api.ObjectAPI.GetObject(bucket, object, startOffset, length, w); err != nil {
errorIf(err, "Writing to client failed.")
// Do not send error response here, client would have already died.
return
}
}
var unixEpochTime = time.Unix(0, 0)
// checkLastModified implements If-Modified-Since and
// If-Unmodified-Since checks.
//
// modtime is the modification time of the resource to be served, or
// IsZero(). return value is whether this request is now complete.
func checkLastModified(w http.ResponseWriter, r *http.Request, modtime time.Time) bool {
if modtime.IsZero() || modtime.Equal(unixEpochTime) {
// If the object doesn't have a modtime (IsZero), or the modtime
// is obviously garbage (Unix time == 0), then ignore modtimes
// and don't process the If-Modified-Since header.
return false
}
// The Date-Modified header truncates sub-second precision, so
// use mtime < t+1s instead of mtime <= t to check for unmodified.
if _, ok := r.Header["If-Modified-Since"]; ok {
// Return the object only if it has been modified since the
// specified time, otherwise return a 304 (not modified).
t, err := time.Parse(http.TimeFormat, r.Header.Get("If-Modified-Since"))
if err == nil && modtime.Before(t.Add(1*time.Second)) {
h := w.Header()
// Remove following headers if already set.
delete(h, "Content-Type")
delete(h, "Content-Length")
delete(h, "Content-Range")
w.WriteHeader(http.StatusNotModified)
return true
}
} else if _, ok := r.Header["If-Unmodified-Since"]; ok {
// Return the object only if it has not been modified since
// the specified time, otherwise return a 412 (precondition failed).
t, err := time.Parse(http.TimeFormat, r.Header.Get("If-Unmodified-Since"))
if err == nil && modtime.After(t.Add(1*time.Second)) {
h := w.Header()
// Remove following headers if already set.
delete(h, "Content-Type")
delete(h, "Content-Length")
delete(h, "Content-Range")
w.WriteHeader(http.StatusPreconditionFailed)
return true
}
}
w.Header().Set("Last-Modified", modtime.UTC().Format(http.TimeFormat))
return false
}
// canonicalizeETag returns ETag with leading and trailing double-quotes removed,
// if any present
func canonicalizeETag(etag string) string {
canonicalETag := strings.TrimPrefix(etag, "\"")
return strings.TrimSuffix(canonicalETag, "\"")
}
// isETagEqual return true if the canonical representations of two ETag strings
// are equal, false otherwise
func isETagEqual(left, right string) bool {
return canonicalizeETag(left) == canonicalizeETag(right)
}
// checkETag implements If-None-Match and If-Match checks.
//
// The ETag must have been previously set in the ResponseWriter's
// headers. The return value is whether this request is now considered
// done.
func checkETag(w http.ResponseWriter, r *http.Request) bool {
// writer always has quoted string
// transform reader's etag to
if r.Method != "GET" && r.Method != "HEAD" {
return false
}
etag := w.Header().Get("ETag")
// Must know ETag.
if etag == "" {
return false
}
if inm := r.Header.Get("If-None-Match"); !isETagEqual(inm, "") {
// Return the object only if its entity tag (ETag) is
// different from the one specified; otherwise, return a 304
// (not modified).
if isETagEqual(inm, etag) || isETagEqual(inm, "*") {
h := w.Header()
// Remove following headers if already set.
delete(h, "Content-Type")
delete(h, "Content-Length")
delete(h, "Content-Range")
w.WriteHeader(http.StatusNotModified)
return true
}
} else if im := r.Header.Get("If-Match"); !isETagEqual(im, "") {
// Return the object only if its entity tag (ETag) is the same
// as the one specified; otherwise, return a 412 (precondition failed).
if !isETagEqual(im, etag) {
h := w.Header()
// Remove following headers if already set.
delete(h, "Content-Type")
delete(h, "Content-Length")
delete(h, "Content-Range")
writeErrorResponse(w, r, ErrPreconditionFailed, r.URL.Path)
return true
}
}
return false
}
// 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"]
switch getRequestAuthType(r) {
default:
// For all unknown auth types return error.
writeErrorResponse(w, r, ErrAccessDenied, r.URL.Path)
return
case authTypeAnonymous:
// http://docs.aws.amazon.com/AmazonS3/latest/dev/using-with-s3-actions.html
if s3Error := enforceBucketPolicy("s3:GetObject", bucket, r.URL); s3Error != ErrNone {
writeErrorResponse(w, r, s3Error, r.URL.Path)
return
}
case authTypePresigned, authTypeSigned:
if s3Error := isReqAuthenticated(r); s3Error != ErrNone {
writeErrorResponse(w, r, s3Error, r.URL.Path)
return
}
}
objInfo, err := api.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, r, apiErr, r.URL.Path)
return
}
// Set standard object headers.
setObjectHeaders(w, objInfo, nil)
// Verify 'If-Modified-Since' and 'If-Unmodified-Since'.
lastModified := objInfo.ModTime
if checkLastModified(w, r, lastModified) {
return
}
// Verify 'If-Match' and 'If-None-Match'.
if checkETag(w, r) {
return
}
// Successfull response.
w.WriteHeader(http.StatusOK)
}
// 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)
bucket := vars["bucket"]
object := vars["object"]
switch getRequestAuthType(r) {
default:
// For all unknown auth types return error.
writeErrorResponse(w, r, ErrAccessDenied, r.URL.Path)
return
case authTypeAnonymous:
// http://docs.aws.amazon.com/AmazonS3/latest/dev/using-with-s3-actions.html
if s3Error := enforceBucketPolicy("s3:PutObject", bucket, r.URL); s3Error != ErrNone {
writeErrorResponse(w, r, s3Error, r.URL.Path)
return
}
case authTypePresigned, authTypeSigned:
if s3Error := isReqAuthenticated(r); s3Error != ErrNone {
writeErrorResponse(w, r, s3Error, r.URL.Path)
return
}
}
// TODO: Reject requests where body/payload is present, for now we
// don't even read it.
// objectSource
objectSource := r.Header.Get("X-Amz-Copy-Source")
// Skip the first element if it is '/', split the rest.
if strings.HasPrefix(objectSource, "/") {
objectSource = objectSource[1:]
}
splits := strings.SplitN(objectSource, "/", 2)
// Save sourceBucket and sourceObject extracted from url Path.
var sourceBucket, sourceObject string
if len(splits) == 2 {
sourceBucket = splits[0]
sourceObject = splits[1]
}
// If source object is empty, reply back error.
if sourceObject == "" {
writeErrorResponse(w, r, ErrInvalidCopySource, r.URL.Path)
return
}
// Source and destination objects cannot be same, reply back error.
if sourceObject == object && sourceBucket == bucket {
writeErrorResponse(w, r, ErrInvalidCopyDest, r.URL.Path)
return
}
objInfo, err := api.ObjectAPI.GetObjectInfo(sourceBucket, sourceObject)
if err != nil {
errorIf(err, "Unable to fetch object info.")
writeErrorResponse(w, r, toAPIErrorCode(err), objectSource)
return
}
// Verify before writing.
// Verify x-amz-copy-source-if-modified-since and
// x-amz-copy-source-if-unmodified-since.
lastModified := objInfo.ModTime
if checkCopySourceLastModified(w, r, lastModified) {
return
}
// Verify x-amz-copy-source-if-match and
// x-amz-copy-source-if-none-match.
if checkCopySourceETag(w, r) {
return
}
/// maximum Upload size for object in a single CopyObject operation.
if isMaxObjectSize(objInfo.Size) {
writeErrorResponse(w, r, ErrEntityTooLarge, objectSource)
return
}
pipeReader, pipeWriter := io.Pipe()
go func() {
startOffset := int64(0) // Read the whole file.
// Get the object.
gErr := api.ObjectAPI.GetObject(sourceBucket, sourceObject, startOffset, objInfo.Size, pipeWriter)
if gErr != nil {
errorIf(gErr, "Unable to read an object.")
pipeWriter.CloseWithError(gErr)
return
}
pipeWriter.Close() // Close.
}()
// Size of object.
size := objInfo.Size
// Save metadata.
metadata := make(map[string]string)
// Save other metadata if available.
metadata["content-type"] = objInfo.ContentType
metadata["content-encoding"] = objInfo.ContentEncoding
// Do not set `md5sum` as CopyObject will not keep the
// same md5sum as the source.
// Create the object.
md5Sum, err := api.ObjectAPI.PutObject(bucket, object, size, pipeReader, metadata)
if err != nil {
errorIf(err, "Unable to create an object.")
writeErrorResponse(w, r, toAPIErrorCode(err), r.URL.Path)
return
}
objInfo, err = api.ObjectAPI.GetObjectInfo(bucket, object)
if err != nil {
errorIf(err, "Unable to fetch object info.")
writeErrorResponse(w, r, toAPIErrorCode(err), r.URL.Path)
return
}
response := generateCopyObjectResponse(md5Sum, objInfo.ModTime)
encodedSuccessResponse := encodeResponse(response)
// write headers
setCommonHeaders(w)
// write success response.
writeSuccessResponse(w, encodedSuccessResponse)
// Explicitly close the reader, to avoid fd leaks.
pipeReader.Close()
}
// checkCopySource implements x-amz-copy-source-if-modified-since and
// x-amz-copy-source-if-unmodified-since checks.
//
// modtime is the modification time of the resource to be served, or
// IsZero(). return value is whether this request is now complete.
func checkCopySourceLastModified(w http.ResponseWriter, r *http.Request, modtime time.Time) bool {
if modtime.IsZero() || modtime.Equal(unixEpochTime) {
// If the object doesn't have a modtime (IsZero), or the modtime
// is obviously garbage (Unix time == 0), then ignore modtimes
// and don't process the If-Modified-Since header.
return false
}
// The Date-Modified header truncates sub-second precision, so
// use mtime < t+1s instead of mtime <= t to check for unmodified.
if _, ok := r.Header["x-amz-copy-source-if-modified-since"]; ok {
// Return the object only if it has been modified since the
// specified time, otherwise return a 304 error (not modified).
t, err := time.Parse(http.TimeFormat, r.Header.Get("x-amz-copy-source-if-modified-since"))
if err == nil && modtime.Before(t.Add(1*time.Second)) {
h := w.Header()
// Remove Content headers if set
delete(h, "Content-Type")
delete(h, "Content-Length")
delete(h, "Content-Range")
w.WriteHeader(http.StatusNotModified)
return true
}
} else if _, ok := r.Header["x-amz-copy-source-if-unmodified-since"]; ok {
// Return the object only if it has not been modified since the
// specified time, otherwise return a 412 error (precondition failed).
t, err := time.Parse(http.TimeFormat, r.Header.Get("x-amz-copy-source-if-unmodified-since"))
if err == nil && modtime.After(t.Add(1*time.Second)) {
h := w.Header()
// Remove Content headers if set
delete(h, "Content-Type")
delete(h, "Content-Length")
delete(h, "Content-Range")
w.WriteHeader(http.StatusPreconditionFailed)
return true
}
}
w.Header().Set("Last-Modified", modtime.UTC().Format(http.TimeFormat))
return false
}
// checkCopySourceETag implements x-amz-copy-source-if-match and
// x-amz-copy-source-if-none-match checks.
//
// The ETag must have been previously set in the ResponseWriter's
// headers. The return value is whether this request is now considered
// complete.
func checkCopySourceETag(w http.ResponseWriter, r *http.Request) bool {
etag := w.Header().Get("ETag")
// Tag must be provided...
if etag == "" {
return false
}
if inm := r.Header.Get("x-amz-copy-source-if-none-match"); inm != "" {
// Return the object only if its entity tag (ETag) is different
// from the one specified; otherwise, return a 304 (not modified).
if r.Method != "PUT" {
return false
}
if inm == etag || inm == "*" {
h := w.Header()
// Remove Content headers if set
delete(h, "Content-Type")
delete(h, "Content-Length")
delete(h, "Content-Range")
w.WriteHeader(http.StatusNotModified)
return true
}
} else if inm := r.Header.Get("x-amz-copy-source-if-match"); inm != "" {
// Return the object only if its entity tag (ETag) is the same
// as the one specified; otherwise, return a 412 (precondition failed).
if r.Method != "PUT" {
return false
}
if inm != etag {
h := w.Header()
// Remove Content headers if set
delete(h, "Content-Type")
delete(h, "Content-Length")
delete(h, "Content-Range")
w.WriteHeader(http.StatusPreconditionFailed)
return true
}
}
return false
}
// 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) {
// If the matching failed, it means that the X-Amz-Copy-Source was
// wrong, fail right here.
if _, ok := r.Header["X-Amz-Copy-Source"]; ok {
writeErrorResponse(w, r, ErrInvalidCopySource, r.URL.Path)
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, r, ErrInvalidDigest, r.URL.Path)
return
}
/// if Content-Length is unknown/missing, deny the request
size := r.ContentLength
if size == -1 && !contains(r.TransferEncoding, "chunked") {
writeErrorResponse(w, r, ErrMissingContentLength, r.URL.Path)
return
}
/// maximum Upload size for objects in a single operation
if isMaxObjectSize(size) {
writeErrorResponse(w, r, ErrEntityTooLarge, r.URL.Path)
return
}
// Save metadata.
metadata := make(map[string]string)
// Make sure we hex encode md5sum here.
metadata["md5Sum"] = hex.EncodeToString(md5Bytes)
// Save other metadata if available.
metadata["content-type"] = r.Header.Get("Content-Type")
metadata["content-encoding"] = r.Header.Get("Content-Encoding")
for key := range r.Header {
cKey := http.CanonicalHeaderKey(key)
if strings.HasPrefix(cKey, "x-amz-meta-") {
metadata[cKey] = r.Header.Get(cKey)
} else if strings.HasPrefix(key, "x-minio-meta-") {
metadata[cKey] = r.Header.Get(cKey)
}
}
var md5Sum string
switch getRequestAuthType(r) {
default:
// For all unknown auth types return error.
writeErrorResponse(w, r, ErrAccessDenied, r.URL.Path)
return
case authTypeAnonymous:
// http://docs.aws.amazon.com/AmazonS3/latest/dev/using-with-s3-actions.html
if s3Error := enforceBucketPolicy("s3:PutObject", bucket, r.URL); s3Error != ErrNone {
writeErrorResponse(w, r, s3Error, r.URL.Path)
return
}
// Create anonymous object.
md5Sum, err = api.ObjectAPI.PutObject(bucket, object, size, r.Body, metadata)
case authTypePresigned, authTypeSigned:
// Initialize a pipe for data pipe line.
reader, writer := io.Pipe()
var wg = &sync.WaitGroup{}
// Start writing in a routine.
wg.Add(1)
go func() {
defer wg.Done()
shaWriter := sha256.New()
multiWriter := io.MultiWriter(shaWriter, writer)
if _, wErr := io.CopyN(multiWriter, r.Body, size); wErr != nil {
// Pipe closed.
if wErr == io.ErrClosedPipe {
return
}
errorIf(wErr, "Unable to read from HTTP body.")
writer.CloseWithError(wErr)
return
}
shaPayload := shaWriter.Sum(nil)
validateRegion := true // Validate region.
var s3Error APIErrorCode
if isRequestSignatureV4(r) {
s3Error = doesSignatureMatch(hex.EncodeToString(shaPayload), r, validateRegion)
} else if isRequestPresignedSignatureV4(r) {
s3Error = doesPresignedSignatureMatch(hex.EncodeToString(shaPayload), r, validateRegion)
}
var sErr error
if s3Error != ErrNone {
if s3Error == ErrSignatureDoesNotMatch {
sErr = errSignatureMismatch
} else {
sErr = fmt.Errorf("%v", getAPIError(s3Error))
}
writer.CloseWithError(sErr)
return
}
writer.Close()
}()
// Create object.
md5Sum, err = api.ObjectAPI.PutObject(bucket, object, size, reader, metadata)
// Close the pipe.
reader.Close()
// Wait for all the routines to finish.
wg.Wait()
}
if err != nil {
errorIf(err, "Unable to create an object.")
writeErrorResponse(w, r, toAPIErrorCode(err), r.URL.Path)
return
}
if md5Sum != "" {
w.Header().Set("ETag", "\""+md5Sum+"\"")
}
writeSuccessResponse(w, nil)
}
/// 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"]
switch getRequestAuthType(r) {
default:
// For all unknown auth types return error.
writeErrorResponse(w, r, ErrAccessDenied, r.URL.Path)
return
case authTypeAnonymous:
// http://docs.aws.amazon.com/AmazonS3/latest/dev/mpuAndPermissions.html
if s3Error := enforceBucketPolicy("s3:PutObject", bucket, r.URL); s3Error != ErrNone {
writeErrorResponse(w, r, s3Error, r.URL.Path)
return
}
case authTypePresigned, authTypeSigned:
if s3Error := isReqAuthenticated(r); s3Error != ErrNone {
writeErrorResponse(w, r, s3Error, r.URL.Path)
return
}
}
// Save metadata.
metadata := make(map[string]string)
// Save other metadata if available.
metadata["content-type"] = r.Header.Get("Content-Type")
metadata["content-encoding"] = r.Header.Get("Content-Encoding")
for key := range r.Header {
cKey := http.CanonicalHeaderKey(key)
if strings.HasPrefix(cKey, "x-amz-meta-") {
metadata[cKey] = r.Header.Get(cKey)
} else if strings.HasPrefix(key, "x-minio-meta-") {
metadata[cKey] = r.Header.Get(cKey)
}
}
uploadID, err := api.ObjectAPI.NewMultipartUpload(bucket, object, metadata)
if err != nil {
errorIf(err, "Unable to initiate new multipart upload id.")
writeErrorResponse(w, r, toAPIErrorCode(err), r.URL.Path)
return
}
response := generateInitiateMultipartUploadResponse(bucket, object, uploadID)
encodedSuccessResponse := encodeResponse(response)
// write headers
setCommonHeaders(w)
// write success response.
writeSuccessResponse(w, encodedSuccessResponse)
}
// PutObjectPartHandler - Upload part
func (api objectAPIHandlers) PutObjectPartHandler(w http.ResponseWriter, r *http.Request) {
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 {
writeErrorResponse(w, r, ErrInvalidDigest, r.URL.Path)
return
}
/// if Content-Length is unknown/missing, throw away
size := r.ContentLength
if size == -1 {
writeErrorResponse(w, r, ErrMissingContentLength, r.URL.Path)
return
}
/// maximum Upload size for multipart objects in a single operation
if isMaxObjectSize(size) {
writeErrorResponse(w, r, ErrEntityTooLarge, r.URL.Path)
return
}
uploadID := r.URL.Query().Get("uploadId")
10BC8
partIDString := r.URL.Query().Get("partNumber")
partID, err := strconv.Atoi(partIDString)
if err != nil {
writeErrorResponse(w, r, ErrInvalidPart, r.URL.Path)
return
}
// check partID with maximum part ID for multipart objects
if isMaxPartID(partID) {
writeErrorResponse(w, r, ErrInvalidMaxParts, r.URL.Path)
return
}
var partMD5 string
switch getRequestAuthType(r) {
default:
// For all unknown auth types return error.
writeErrorResponse(w, r, ErrAccessDenied, r.URL.Path)
return
case authTypeAnonymous:
// http://docs.aws.amazon.com/AmazonS3/latest/dev/mpuAndPermissions.html
if s3Error := enforceBucketPolicy("s3:PutObject", bucket, r.URL); s3Error != ErrNone {
writeErrorResponse(w, r, s3Error, r.URL.Path)
return
}
// No need to verify signature, anonymous request access is
// already allowed.
hexMD5 := hex.EncodeToString(md5Bytes)
partMD5, err = api.ObjectAPI.PutObjectPart(bucket, object, uploadID, partID, size, r.Body, hexMD5)
case authTypePresigned, authTypeSigned:
// Initialize a pipe for data pipe line.
reader, writer := io.Pipe()
var wg = &sync.WaitGroup{}
// Start writing in a routine.
wg.Add(1)
go func() {
defer wg.Done()
shaWriter := sha256.New()
multiWriter := io.MultiWriter(shaWriter, writer)
if _, wErr := io.CopyN(multiWriter, r.Body, size); wErr != nil {
// Pipe closed, just ignore it.
if wErr == io.ErrClosedPipe {
return
}
errorIf(wErr, "Unable to read from HTTP request body.")
writer.CloseWithError(wErr)
return
}
shaPayload := shaWriter.Sum(nil)
validateRegion := true // Validate region.
var s3Error APIErrorCode
if isRequestSignatureV4(r) {
s3Error = doesSignatureMatch(hex.EncodeToString(shaPayload), r, validateRegion)
} else if isRequestPresignedSignatureV4(r) {
s3Error = doesPresignedSignatureMatch(hex.EncodeToString(shaPayload), r, validateRegion)
}
if s3Error != ErrNone {
if s3Error == ErrSignatureDoesNotMatch {
err = errSignatureMismatch
} else {
err = fmt.Errorf("%v", getAPIError(s3Error))
}
writer.CloseWithError(err)
return
}
// Close the writer.
writer.Close()
}()
md5SumHex := hex.EncodeToString(md5Bytes)
partMD5, err = api.ObjectAPI.PutObjectPart(bucket, object, uploadID, partID, size, reader, md5SumHex)
// Close the pipe.
reader.Close()
// Wait for all the routines to finish.
wg.Wait()
}
if err != nil {
errorIf(err, "Unable to create object part.")
// Verify if the underlying error is signature mismatch.
writeErrorResponse(w, r, toAPIErrorCode(err), r.URL.Path)
return
}
if partMD5 != "" {
w.Header().Set("ETag", "\""+partMD5+"\"")
}
writeSuccessResponse(w, nil)
}
// AbortMultipartUploadHandler - Abort multipart upload
func (api objectAPIHandlers) AbortMultipartUploadHandler(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
bucket := vars["bucket"]
object := vars["object"]
switch getRequestAuthType(r) {
default:
// For all unknown auth types return error.
writeErrorResponse(w, r, ErrAccessDenied, r.URL.Path)
return
case authTypeAnonymous:
// http://docs.aws.amazon.com/AmazonS3/latest/dev/mpuAndPermissions.html
if s3Error := enforceBucketPolicy("s3:AbortMultipartUpload", bucket, r.URL); s3Error != ErrNone {
writeErrorResponse(w, r, s3Error, r.URL.Path)
return
}
case authTypePresigned, authTypeSigned:
if s3Error := isReqAuthenticated(r); s3Error != ErrNone {
writeErrorResponse(w, r, s3Error, r.URL.Path)
return
}
}
uploadID, _, _, _ := getObjectResources(r.URL.Query())
if err := api.ObjectAPI.AbortMultipartUpload(bucket, object, uploadID); err != nil {
errorIf(err, "Unable to abort multipart upload.")
writeErrorResponse(w, r, toAPIErrorCode(err), r.URL.Path)
return
}
writeSuccessNoContent(w)
}
// Send whitespace character, once every 5secs, until CompleteMultipartUpload is done.
// CompleteMultipartUpload method of the object layer indicates that it's done via doneCh
func sendWhiteSpaceChars(w http.ResponseWriter, doneCh <-chan struct{}) {
for {
select {
case <-time.After(5 * time.Second):
w.Write([]byte(" "))
case <-doneCh:
return
}
}
}
// ListObjectPartsHandler - List object parts
func (api objectAPIHandlers) ListObjectPartsHandler(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
bucket := vars["bucket"]
object := vars["object"]
switch getRequestAuthType(r) {
default:
// For all unknown auth types return error.
writeErrorResponse(w, r, ErrAccessDenied, r.URL.Path)
return
case authTypeAnonymous:
// http://docs.aws.amazon.com/AmazonS3/latest/dev/mpuAndPermissions.html
if s3Error := enforceBucketPolicy("s3:ListMultipartUploadParts", bucket, r.URL); s3Error != ErrNone {
writeErrorResponse(w, r, s3Error, r.URL.Path)
return
}
case authTypePresigned, authTypeSigned:
if s3Error := isReqAuthenticated(r); s3Error != ErrNone {
writeErrorResponse(w, r, s3Error, r.URL.Path)
return
}
}
uploadID, partNumberMarker, maxParts, _ := getObjectResources(r.URL.Query())
if partNumberMarker < 0 {
writeErrorResponse(w, r, ErrInvalidPartNumberMarker, r.URL.Path)
return
}
if maxParts < 0 {
writeErrorResponse(w, r, ErrInvalidMaxParts, r.URL.Path)
return
}
listPartsInfo, err := api.ObjectAPI.ListObjectParts(bucket, object, uploadID, partNumberMarker, maxParts)
if err != nil {
errorIf(err, "Unable to list uploaded parts.")
writeErrorResponse(w, r, toAPIErrorCode(err), r.URL.Path)
return
}
response := generateListPartsResponse(listPartsInfo)
encodedSuccessResponse := encodeResponse(response)
// Write headers.
setCommonHeaders(w)
// Write success response.
writeSuccessResponse(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"]
// Get upload id.
uploadID, _, _, _ := getObjectResources(r.URL.Query())
var md5Sum string
var err error
switch getRequestAuthType(r) {
default:
// For all unknown auth types return error.
writeErrorResponse(w, r, ErrAccessDenied, r.URL.Path)
return
case authTypeAnonymous:
// http://docs.aws.amazon.com/AmazonS3/latest/dev/mpuAndPermissions.html
if s3Error := enforceBucketPolicy("s3:PutObject", bucket, r.URL); s3Error != ErrNone {
writeErrorResponse(w, r, s3Error, r.URL.Path)
return
}
case authTypePresigned, authTypeSigned:
if s3Error := isReqAuthenticated(r); s3Error != ErrNone {
writeErrorResponse(w, r, s3Error, r.URL.Path)
return
}
}
completeMultipartBytes, err := ioutil.ReadAll(r.Body)
if err != nil {
errorIf(err, "Unable to complete multipart upload.")
writeErrorResponse(w, r, ErrInternalError, r.URL.Path)
return
}
complMultipartUpload := &completeMultipartUpload{}
if err = xml.Unmarshal(completeMultipartBytes, complMultipartUpload); err != nil {
errorIf(err, "Unable to parse complete multipart upload XML.")
writeErrorResponse(w, r, ErrMalformedXML, r.URL.Path)
return
}
if len(complMultipartUpload.Parts) == 0 {
writeErrorResponse(w, r, ErrMalformedXML, r.URL.Path)
return
}
if !sort.IsSorted(completedParts(complMultipartUpload.Parts)) {
writeErrorResponse(w, r, ErrInvalidPartOrder, r.URL.Path)
return
}
// Complete parts.
var completeParts []completePart
for _, part := range complMultipartUpload.Parts {
part.ETag = strings.TrimPrefix(part.ETag, "\"")
part.ETag = strings.TrimSuffix(part.ETag, "\"")
completeParts = append(completeParts, part)
}
// Complete multipart upload.
// Send 200 OK
setCommonHeaders(w)
w.WriteHeader(http.StatusOK)
doneCh := make(chan struct{})
// Signal that completeMultipartUpload is over via doneCh
go func(doneCh chan<- struct{}) {
md5Sum, err = api.ObjectAPI.CompleteMultipartUpload(bucket, object, uploadID, completeParts)
doneCh <- struct{}{}
}(doneCh)
sendWhiteSpaceChars(w, doneCh)
if err != nil {
errorIf(err, "Unable to complete multipart upload.")
switch oErr := err.(type) {
case PartTooSmall:
// Write part too small error.
writePartSmallErrorResponse(w, r, oErr)
default:
// Handle all other generic issues.
writeErrorResponseNoHeader(w, r, getAPIError(toAPIErrorCode(err)), r.URL.Path)
}
return
}
// Get object location.