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minio/pkg/api/api_object_handlers.go

462 lines
13 KiB

/*
* Minimalist Object 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 api
import (
"net/http"
"sort"
"strconv"
"encoding/xml"
"github.com/gorilla/mux"
"github.com/minio/minio/pkg/iodine"
"github.com/minio/minio/pkg/storage/drivers"
"github.com/minio/minio/pkg/utils/log"
)
const (
maxPartsList = 1000
)
// GET Object
// ----------
// This implementation of the GET operation retrieves object. To use GET,
// you must have READ access to the object.
func (server *minioAPI) getObjectHandler(w http.ResponseWriter, req *http.Request) {
acceptsContentType := getContentType(req)
// verify if this operation is allowed
if !server.isValidOp(w, req, acceptsContentType) {
return
}
var object, bucket string
vars := mux.Vars(req)
bucket = vars["bucket"]
object = vars["object"]
metadata, err := server.driver.GetObjectMetadata(bucket, object)
switch iodine.ToError(err).(type) {
case nil: // success
{
httpRange, err := getRequestedRange(req, metadata.Size)
if err != nil {
writeErrorResponse(w, req, InvalidRange, acceptsContentType, req.URL.Path)
return
}
switch httpRange.start == 0 && httpRange.length == 0 {
case true:
setObjectHeaders(w, metadata)
if _, err := server.driver.GetObject(w, bucket, object); err != nil {
// unable to write headers, we've already printed data. Just close the connection.
log.Error.Println(iodine.New(err, nil))
}
case false:
metadata.Size = httpRange.length
setRangeObjectHeaders(w, metadata, httpRange)
w.WriteHeader(http.StatusPartialContent)
if _, err := server.driver.GetPartialObject(w, bucket, object, httpRange.start, httpRange.length); err != nil {
// unable to write headers, we've already printed data. Just close the connection.
log.Error.Println(iodine.New(err, nil))
}
}
}
case drivers.ObjectNotFound:
{
writeErrorResponse(w, req, NoSuchKey, acceptsContentType, req.URL.Path)
}
case drivers.ObjectNameInvalid:
{
writeErrorResponse(w, req, NoSuchKey, acceptsContentType, req.URL.Path)
}
default:
{
log.Error.Println(iodine.New(err, nil))
writeErrorResponse(w, req, InternalError, acceptsContentType, req.URL.Path)
}
}
}
// HEAD Object
// -----------
// The HEAD operation retrieves metadata from an object without returning the object itself.
func (server *minioAPI) headObjectHandler(w http.ResponseWriter, req *http.Request) {
acceptsContentType := getContentType(req)
// verify if this operation is allowed
if !server.isValidOp(w, req, acceptsContentType) {
return
}
var object, bucket string
vars := mux.Vars(req)
bucket = vars["bucket"]
object = vars["object"]
metadata, err := server.driver.GetObjectMetadata(bucket, object)
switch iodine.ToError(err).(type) {
case nil:
{
setObjectHeaders(w, metadata)
w.WriteHeader(http.StatusOK)
}
case drivers.ObjectNotFound:
{
error := getErrorCode(NoSuchKey)
w.Header().Set("Server", "Minio")
w.WriteHeader(error.HTTPStatusCode)
}
case drivers.ObjectNameInvalid:
{
error := getErrorCode(NoSuchKey)
w.Header().Set("Server", "Minio")
w.WriteHeader(error.HTTPStatusCode)
}
default:
{
log.Error.Println(iodine.New(err, nil))
error := getErrorCode(InternalError)
w.Header().Set("Server", "Minio")
w.WriteHeader(error.HTTPStatusCode)
}
}
}
// PUT Object
// ----------
// This implementation of the PUT operation adds an object to a bucket.
func (server *minioAPI) putObjectHandler(w http.ResponseWriter, req *http.Request) {
acceptsContentType := getContentType(req)
// verify if this operation is allowed
if !server.isValidOp(w, req, acceptsContentType) {
return
}
var object, bucket string
vars := mux.Vars(req)
bucket = vars["bucket"]
object = vars["object"]
// get Content-MD5 sent by client and verify if valid
md5 := req.Header.Get("Content-MD5")
if !isValidMD5(md5) {
writeErrorResponse(w, req, InvalidDigest, acceptsContentType, req.URL.Path)
return
}
/// if Content-Length missing, throw away
size := req.Header.Get("Content-Length")
if size == "" {
writeErrorResponse(w, req, MissingContentLength, acceptsContentType, req.URL.Path)
return
}
/// maximum Upload size for objects in a single operation
if isMaxObjectSize(size) {
writeErrorResponse(w, req, EntityTooLarge, acceptsContentType, req.URL.Path)
return
}
/// minimum Upload size for objects in a single operation
//
// Surprisingly while Amazon in their document states that S3 objects have 1byte
// as the minimum limit, they do not seem to enforce it one can successfully
// create a 0byte file using a regular putObject() operation
//
// For example take a look at :-
//
// $ mc ls https://s3.amazonaws.com/ferenginar/test.go
//
// if isMinObjectSize(size) {
// writeErrorResponse(w, req, EntityTooSmall, acceptsContentType, req.URL.Path)
// return
// }
sizeInt64, err := strconv.ParseInt(size, 10, 64)
if err != nil {
writeErrorResponse(w, req, InvalidRequest, acceptsContentType, req.URL.Path)
return
}
calculatedMD5, err := server.driver.CreateObject(bucket, object, "", md5, sizeInt64, req.Body)
switch iodine.ToError(err).(type) {
case nil:
{
w.Header().Set("ETag", calculatedMD5)
writeSuccessResponse(w, acceptsContentType)
}
case drivers.ObjectExists:
{
writeErrorResponse(w, req, MethodNotAllowed, acceptsContentType, req.URL.Path)
}
case drivers.BadDigest:
{
writeErrorResponse(w, req, BadDigest, acceptsContentType, req.URL.Path)
}
case drivers.EntityTooLarge:
{
writeErrorResponse(w, req, EntityTooLarge, acceptsContentType, req.URL.Path)
}
case drivers.InvalidDigest:
{
writeErrorResponse(w, req, InvalidDigest, acceptsContentType, req.URL.Path)
}
default:
{
log.Error.Println(iodine.New(err, nil))
writeErrorResponse(w, req, InternalError, acceptsContentType, req.URL.Path)
}
}
}
func (server *minioAPI) newMultipartUploadHandler(w http.ResponseWriter, req *http.Request) {
acceptsContentType := getContentType(req)
// handle ACL's here at bucket level
if !server.isValidOp(w, req, acceptsContentType) {
return
}
if !isRequestUploads(req.URL.Query()) {
writeErrorResponse(w, req, MethodNotAllowed, acceptsContentType, req.URL.Path)
return
}
var object, bucket string
vars := mux.Vars(req)
bucket = vars["bucket"]
object = vars["object"]
uploadID, err := server.driver.NewMultipartUpload(bucket, object, "")
switch iodine.ToError(err).(type) {
case nil:
{
response := generateInitiateMultipartUploadResult(bucket, object, uploadID)
encodedSuccessResponse := encodeSuccessResponse(response, acceptsContentType)
// write headers
setCommonHeaders(w, getContentTypeString(acceptsContentType), len(encodedSuccessResponse))
// write body
w.Write(encodedSuccessResponse)
}
case drivers.ObjectExists:
{
writeErrorResponse(w, req, MethodNotAllowed, acceptsContentType, req.URL.Path)
}
default:
{
log.Error.Println(iodine.New(err, nil))
writeErrorResponse(w, req, InternalError, acceptsContentType, req.URL.Path)
}
}
}
func (server *minioAPI) putObjectPartHandler(w http.ResponseWriter, req *http.Request) {
acceptsContentType := getContentType(req)
// handle ACL's here at bucket level
if !server.isValidOp(w, req, acceptsContentType) {
return
}
// get Content-MD5 sent by client and verify if valid
md5 := req.Header.Get("Content-MD5")
if !isValidMD5(md5) {
writeErrorResponse(w, req, InvalidDigest, acceptsContentType, req.URL.Path)
return
}
/// if Content-Length missing, throw away
size := req.Header.Get("Content-Length")
if size == "" {
writeErrorResponse(w, req, MissingContentLength, acceptsContentType, req.URL.Path)
return
}
/// maximum Upload size for multipart objects in a single operation
if isMaxObjectSize(size) {
writeErrorResponse(w, req, EntityTooLarge, acceptsContentType, req.URL.Path)
return
}
sizeInt64, err := strconv.ParseInt(size, 10, 64)
if err != nil {
writeErrorResponse(w, req, InvalidRequest, acceptsContentType, req.URL.Path)
return
}
vars := mux.Vars(req)
bucket := vars["bucket"]
object := vars["object"]
uploadID := req.URL.Query().Get("uploadId")
partIDString := req.URL.Query().Get("partNumber")
partID, err := strconv.Atoi(partIDString)
if err != nil {
writeErrorResponse(w, req, InvalidPart, acceptsContentType, req.URL.Path)
}
calculatedMD5, err := server.driver.CreateObjectPart(bucket, object, uploadID, partID, "", md5, sizeInt64, req.Body)
switch iodine.ToError(err).(type) {
case nil:
{
w.Header().Set("ETag", calculatedMD5)
writeSuccessResponse(w, acceptsContentType)
}
case drivers.InvalidUploadID:
{
writeErrorResponse(w, req, NoSuchUpload, acceptsContentType, req.URL.Path)
}
case drivers.ObjectExists:
{
writeErrorResponse(w, req, MethodNotAllowed, acceptsContentType, req.URL.Path)
}
case drivers.BadDigest:
{
writeErrorResponse(w, req, BadDigest, acceptsContentType, req.URL.Path)
}
case drivers.EntityTooLarge:
{
writeErrorResponse(w, req, EntityTooLarge, acceptsContentType, req.URL.Path)
}
case drivers.InvalidDigest:
{
writeErrorResponse(w, req, InvalidDigest, acceptsContentType, req.URL.Path)
}
default:
{
log.Error.Println(iodine.New(err, nil))
writeErrorResponse(w, req, InternalError, acceptsContentType, req.URL.Path)
}
}
}
func (server *minioAPI) abortMultipartUploadHandler(w http.ResponseWriter, req *http.Request) {
acceptsContentType := getContentType(req)
// handle ACL's here at bucket level
if !server.isValidOp(w, req, acceptsContentType) {
return
}
vars := mux.Vars(req)
bucket := vars["bucket"]
object := vars["object"]
objectResourcesMetadata := getObjectResources(req.URL.Query())
err := server.driver.AbortMultipartUpload(bucket, object, objectResourcesMetadata.UploadID)
switch iodine.ToError(err).(type) {
case nil:
{
setCommonHeaders(w, getContentTypeString(acceptsContentType), 0)
w.WriteHeader(http.StatusNoContent)
}
case drivers.InvalidUploadID:
{
writeErrorResponse(w, req, NoSuchUpload, acceptsContentType, req.URL.Path)
}
default:
{
log.Error.Println(iodine.New(err, nil))
writeErrorResponse(w, req, InternalError, acceptsContentType, req.URL.Path)
}
}
}
func (server *minioAPI) listObjectPartsHandler(w http.ResponseWriter, req *http.Request) {
acceptsContentType := getContentType(req)
// handle ACL's here at bucket level
if !server.isValidOp(w, req, acceptsContentType) {
return
}
objectResourcesMetadata := getObjectResources(req.URL.Query())
if objectResourcesMetadata.MaxParts == 0 {
objectResourcesMetadata.MaxParts = maxPartsList
}
vars := mux.Vars(req)
bucket := vars["bucket"]
object := vars["object"]
objectResourcesMetadata, err := server.driver.ListObjectParts(bucket, object, objectResourcesMetadata)
switch iodine.ToError(err).(type) {
case nil:
{
response := generateListPartsResult(objectResourcesMetadata)
encodedSuccessResponse := encodeSuccessResponse(response, acceptsContentType)
// write headers
setCommonHeaders(w, getContentTypeString(acceptsContentType), len(encodedSuccessResponse))
// write body
w.Write(encodedSuccessResponse)
}
case drivers.InvalidUploadID:
{
writeErrorResponse(w, req, NoSuchUpload, acceptsContentType, req.URL.Path)
}
default:
{
log.Error.Println(iodine.New(err, nil))
writeErrorResponse(w, req, InternalError, acceptsContentType, req.URL.Path)
}
}
}
func (server *minioAPI) completeMultipartUploadHandler(w http.ResponseWriter, req *http.Request) {
acceptsContentType := getContentType(req)
// handle ACL's here at bucket level
if !server.isValidOp(w, req, acceptsContentType) {
return
}
decoder := xml.NewDecoder(req.Body)
parts := &CompleteMultipartUpload{}
err := decoder.Decode(parts)
if err != nil {
log.Error.Println(iodine.New(err, nil))
writeErrorResponse(w, req, InternalError, acceptsContentType, req.URL.Path)
return
}
if !sort.IsSorted(completedParts(parts.Part)) {
writeErrorResponse(w, req, InvalidPartOrder, acceptsContentType, req.URL.Path)
return
}
vars := mux.Vars(req)
bucket := vars["bucket"]
object := vars["object"]
objectResourcesMetadata := getObjectResources(req.URL.Query())
partMap := make(map[int]string)
for _, part := range parts.Part {
partMap[part.PartNumber] = part.ETag
}
etag, err := server.driver.CompleteMultipartUpload(bucket, object, objectResourcesMetadata.UploadID, partMap)
switch iodine.ToError(err).(type) {
case nil:
{
response := generateCompleteMultpartUploadResult(bucket, object, "", etag)
encodedSuccessResponse := encodeSuccessResponse(response, acceptsContentType)
// write headers
setCommonHeaders(w, getContentTypeString(acceptsContentType), len(encodedSuccessResponse))
// write body
w.Write(encodedSuccessResponse)
}
case drivers.InvalidUploadID:
{
writeErrorResponse(w, req, NoSuchUpload, acceptsContentType, req.URL.Path)
}
default:
{
log.Error.Println(iodine.New(err, nil))
writeErrorResponse(w, req, InternalError, acceptsContentType, req.URL.Path)
}
}
}