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/*
* Minio Go Library for Amazon S3 Compatible Cloud Storage (C) 2015, 2016 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 minio
import (
"io"
"os"
"reflect"
"runtime"
"strings"
"github.com/minio/minio-go/pkg/credentials"
"github.com/minio/minio-go/pkg/s3utils"
)
// toInt - converts go value to its integer representation based
// on the value kind if it is an integer.
func toInt(value reflect.Value) (size int64) {
size = -1
if value.IsValid() {
switch value.Kind() {
case reflect.Int:
fallthrough
case reflect.Int8:
fallthrough
case reflect.Int16:
fallthrough
case reflect.Int32:
fallthrough
case reflect.Int64:
size = value.Int()
}
}
return size
}
// getReaderSize - Determine the size of Reader if available.
func getReaderSize(reader io.Reader) (size int64, err error) {
size = -1
if reader == nil {
return -1, nil
}
// Verify if there is a method by name 'Size'.
sizeFn := reflect.ValueOf(reader).MethodByName("Size")
// Verify if there is a method by name 'Len'.
lenFn := reflect.ValueOf(reader).MethodByName("Len")
if sizeFn.IsValid() {
if sizeFn.Kind() == reflect.Func {
// Call the 'Size' function and save its return value.
result := sizeFn.Call([]reflect.Value{})
if len(result) == 1 {
size = toInt(result[0])
}
}
} else if lenFn.IsValid() {
if lenFn.Kind() == reflect.Func {
// Call the 'Len' function and save its return value.
result := lenFn.Call([]reflect.Value{})
if len(result) == 1 {
size = toInt(result[0])
}
}
} else {
// Fallback to Stat() method, two possible Stat() structs exist.
switch v := reader.(type) {
case *os.File:
var st os.FileInfo
st, err = v.Stat()
if err != nil {
// Handle this case specially for "windows",
// certain files for example 'Stdin', 'Stdout' and
// 'Stderr' it is not allowed to fetch file information.
if runtime.GOOS == "windows" {
if strings.Contains(err.Error(), "GetFileInformationByHandle") {
return -1, nil
}
}
return
}
// Ignore if input is a directory, throw an error.
if st.Mode().IsDir() {
return -1, ErrInvalidArgument("Input file cannot be a directory.")
}
// Ignore 'Stdin', 'Stdout' and 'Stderr', since they
// represent *os.File type but internally do not
// implement Seekable calls. Ignore them and treat
// them like a stream with unknown length.
switch st.Name() {
case "stdin", "stdout", "stderr":
return
// Ignore read/write stream of os.Pipe() which have unknown length too.
case "|0", "|1":
return
}
var pos int64
pos, err = v.Seek(0, 1) // SeekCurrent.
if err != nil {
return -1, err
}
size = st.Size() - pos
case *Object:
var st ObjectInfo
st, err = v.Stat()
if err != nil {
return
}
var pos int64
pos, err = v.Seek(0, 1) // SeekCurrent.
if err != nil {
return -1, err
}
size = st.Size - pos
}
}
// Returns the size here.
return size, err
}
// completedParts is a collection of parts sortable by their part numbers.
// used for sorting the uploaded parts before completing the multipart request.
type completedParts []CompletePart
func (a completedParts) Len() int { return len(a) }
func (a completedParts) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
func (a completedParts) Less(i, j int) bool { return a[i].PartNumber < a[j].PartNumber }
// PutObject creates an object in a bucket.
//
// You must have WRITE permissions on a bucket to create an object.
//
// - For size smaller than 64MiB PutObject automatically does a
// single atomic Put operation.
// - For size larger than 64MiB PutObject automatically does a
// multipart Put operation.
// - For size input as -1 PutObject does a multipart Put operation
// until input stream reaches EOF. Maximum object size that can
// be uploaded through this operation will be 5TiB.
func (c Client) PutObject(bucketName, objectName string, reader io.Reader, contentType string) (n int64, err error) {
return c.PutObjectWithMetadata(bucketName, objectName, reader, map[string][]string{
"Content-Type": []string{contentType},
}, nil)
}
// PutObjectWithSize - is a helper PutObject similar in behavior to PutObject()
// but takes the size argument explicitly, this function avoids doing reflection
// internally to figure out the size of input stream. Also if the input size is
// lesser than 0 this function returns an error.
func (c Client) PutObjectWithSize(bucketName, objectName string, reader io.Reader, readerSize int64, metadata map[string][]string, progress io.Reader) (n int64, err error) {
return c.putObjectCommon(bucketName, objectName, reader, readerSize, metadata, progress)
}
// PutObjectWithMetadata using AWS streaming signature V4
func (c Client) PutObjectWithMetadata(bucketName, objectName string, reader io.Reader, metadata map[string][]string, progress io.Reader) (n int64, err error) {
return c.PutObjectWithProgress(bucketName, objectName, reader, metadata, progress)
}
// PutObjectWithProgress using AWS streaming signature V4
func (c Client) PutObjectWithProgress(bucketName, objectName string, reader io.Reader, metadata map[string][]string, progress io.Reader) (n int64, err error) {
// Size of the object.
var size int64
// Get reader size.
size, err = getReaderSize(reader)
if err != nil {
return 0, err
}
return c.putObjectCommon(bucketName, objectName, reader, size, metadata, progress)
}
func (c Client) putObjectCommon(bucketName, objectName string, reader io.Reader, size int64, metadata map[string][]string, progress io.Reader) (n int64, err error) {
// Check for largest object size allowed.
if size > int64(maxMultipartPutObjectSize) {
return 0, ErrEntityTooLarge(size, maxMultipartPutObjectSize, bucketName, objectName)
}
// NOTE: Streaming signature is not supported by GCS.
if s3utils.IsGoogleEndpoint(c.endpointURL) {
// Do not compute MD5 for Google Cloud Storage.
return c.putObjectNoChecksum(bucketName, objectName, reader, size, metadata, progress)
}
if c.overrideSignerType.IsV2() {
if size > 0 && size < minPartSize {
return c.putObjectNoChecksum(bucketName, objectName, reader, size, metadata, progress)
}
return c.putObjectMultipart(bucketName, objectName, reader, size, metadata, progress)
}
// If size cannot be found on a stream, it is not possible
// to upload using streaming signature, fall back to multipart.
if size < 0 {
return c.putObjectMultipart(bucketName, objectName, reader, size, metadata, progress)
}
// Set streaming signature.
c.overrideSignerType = credentials.SignatureV4Streaming
if size < minPartSize {
return c.putObjectNoChecksum(bucketName, objectName, reader, size, metadata, progress)
}
// For all sizes greater than 64MiB do multipart.
return c.putObjectMultipartStream(bucketName, objectName, reader, size, metadata, progress)
}
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