Upgrading server dependancies (#8154)

vendor/github.com/minio/minio-go/api-stat.go

@@ -1,5 +1,6 @@
 /*
- * Minio Go Library for Amazon S3 Compatible Cloud Storage (C) 2015, 2016 Minio, Inc.
+ * Minio Go Library for Amazon S3 Compatible Cloud Storage
+ * Copyright 2015-2017 Minio, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,6 +18,7 @@
 package minio
 
 import (
+	"context"
 	"net/http"
 	"strconv"
 	"strings"
@@ -33,9 +35,9 @@ func (c Client) BucketExists(bucketName string) (bool, error) {
 	}
 
 	// Execute HEAD on bucketName.
-	resp, err := c.executeMethod("HEAD", requestMetadata{
-		bucketName:         bucketName,
-		contentSHA256Bytes: emptySHA256,
+	resp, err := c.executeMethod(context.Background(), "HEAD", requestMetadata{
+		bucketName:       bucketName,
+		contentSHA256Hex: emptySHA256Hex,
 	})
 	defer closeResponse(resp)
 	if err != nil {
@@ -80,7 +82,7 @@ func extractObjMetadata(header http.Header) http.Header {
 }
 
 // StatObject verifies if object exists and you have permission to access.
-func (c Client) StatObject(bucketName, objectName string) (ObjectInfo, error) {
+func (c Client) StatObject(bucketName, objectName string, opts StatObjectOptions) (ObjectInfo, error) {
 	// Input validation.
 	if err := s3utils.CheckValidBucketName(bucketName); err != nil {
 		return ObjectInfo{}, err
@@ -88,12 +90,11 @@ func (c Client) StatObject(bucketName, objectName string) (ObjectInfo, error) {
 	if err := s3utils.CheckValidObjectName(objectName); err != nil {
 		return ObjectInfo{}, err
 	}
-	reqHeaders := NewHeadReqHeaders()
-	return c.statObject(bucketName, objectName, reqHeaders)
+	return c.statObject(context.Background(), bucketName, objectName, opts)
 }
 
 // Lower level API for statObject supporting pre-conditions and range headers.
-func (c Client) statObject(bucketName, objectName string, reqHeaders RequestHeaders) (ObjectInfo, error) {
+func (c Client) statObject(ctx context.Context, bucketName, objectName string, opts StatObjectOptions) (ObjectInfo, error) {
 	// Input validation.
 	if err := s3utils.CheckValidBucketName(bucketName); err != nil {
 		return ObjectInfo{}, err
@@ -102,17 +103,12 @@ func (c Client) statObject(bucketName, objectName string, reqHeaders RequestHead
 		return ObjectInfo{}, err
 	}
 
-	customHeader := make(http.Header)
-	for k, v := range reqHeaders.Header {
-		customHeader[k] = v
-	}
-
 	// Execute HEAD on objectName.
-	resp, err := c.executeMethod("HEAD", requestMetadata{
-		bucketName:         bucketName,
-		objectName:         objectName,
-		contentSHA256Bytes: emptySHA256,
-		customHeader:       customHeader,
+	resp, err := c.executeMethod(ctx, "HEAD", requestMetadata{
+		bucketName:       bucketName,
+		objectName:       objectName,
+		contentSHA256Hex: emptySHA256Hex,
+		customHeader:     opts.Header(),
 	})
 	defer closeResponse(resp)
 	if err != nil {