success: false,
		},
		// duplicate conditions, reject
		{

if $statement.resources }}, "Resource": [ "{{ $statement.resources | join "\",\n\"" }}" ]{{ end }} {{- if $statement.conditions }} {{- $condition_len := len $statement.conditions }} {{- $condition_len := sub $condition_len 1 }} , "Condition": { {{- range $k,$v := $statement.conditions }} {{- range $operator,$object := $v }} "{{ $operator }}": { {{ $object }} }{{- if lt $k $condition_len }},{{- end }} {{- end }}{{- end }} }{{- end }} }{{ if lt $i $statements_length }},{{end }} {{- end }} ] }...

      "Action":     "s3:GetObject",
      "Resource":    "arn:aws:s3:::%s/*",
      "Condition": {  "StringEquals": {"s3:ExistingObjectTag/security": "public" } }
    },
    {
      "Effect":     "Allow",
      "Action":     "s3:DeleteObjectTagging",
      "Resource":    "arn:aws:s3:::%s/*",
      "Condition": {  "StringEquals": {"s3:ExistingObjectTag/security": "public" } }
    },
    {

- `aws:SourceIp` - This is the requester's IP address, for use with IP address conditions. If running behind Nginx like proxies, MinIO preserve's the source IP.

```
{
  "Version": "2012-10-17",
  "Statement": {
	"Effect": "Allow",
	"Action": "s3:ListBucket*",
	"Resource": "arn:aws:s3:::mybucket",
	"Condition": {"IpAddress": {"aws:SourceIp": "203.0.113.0/24"}}
  }
}
```

// the path. Otherwise it returns false.
func getLastKeypathComponent(e *Expression) (string, bool) {
	if len(e.And) > 1 ||
		len(e.And[0].Condition) > 1 ||
		e.And[0].Condition[0].Not != nil ||
		e.And[0].Condition[0].Operand.ConditionRHS != nil {
		return "", false
	}

	operand := e.And[0].Condition[0].Operand.Operand
	if operand.Right != nil ||
		operand.Left.Right != nil ||
		operand.Left.Left.Negated != nil ||

	// Add the bucket condition, only accept buckets equal to the one passed.
	bucketConditionStr := fmt.Sprintf(`["eq", "$bucket", "%s"]`, bucketName)
	// Add the key condition, only accept keys equal to the one passed.
	keyConditionStr := fmt.Sprintf(`["eq", "$key", "%s/upload.txt"]`, objectKey)
	// Add content length condition, only accept content sizes of a given length.

if $statement.resources }}, "Resource": [ "{{ $statement.resources | join "\",\n\"" }}" ]{{ end }} {{- if $statement.conditions }} {{- $condition_len := len $statement.conditions }} {{- $condition_len := sub $condition_len 1 }} , "Condition": { {{- range $k,$v := $statement.conditions }} {{- range $operator,$object := $v }} "{{ $operator }}": { {{ $object }} }{{- if lt $k $condition_len }},{{- end }} {{- end }}{{- end }} }{{- end }} }{{ if lt $i $statements_length }},{{end }} {{- end }} ] } minio...

if $statement.resources }}, "Resource": [ "{{ $statement.resources | join "\",\n\"" }}" ]{{ end }} {{- if $statement.conditions }} {{- $condition_len := len $statement.conditions }} {{- $condition_len := sub $condition_len 1 }} , "Condition": { {{- range $k,$v := $statement.conditions }} {{- range $operator,$object := $v }} "{{ $operator }}": { {{ $object }} }{{- if lt $k $condition_len }},{{- end }} {{- end }}{{- end }} }{{- end }} }{{ if lt $i $statements_length }},{{end }} {{- end }} ] } minio...

			return true
		}
		if checkCopyObjectPartPreconditions(ctx, w, r, o) {
			return true
		}
		if parseRangeErr != nil {
			writeCopyPartErr(ctx, w, parseRangeErr, r.URL)
			// Range header mismatch is pre-condition like failure
			// so return true to indicate Range precondition failed.
			return true
		}
		return false
	}
	getOpts.CheckPrecondFn = checkCopyPartPrecondFn

type Config struct {
	// Flag indicating whether cache is enabled.
	Enable bool `json:"enable"`

	// Endpoint for caching uses remote mcache server to
	// store and retrieve pre-condition check entities such as
	// Etag and ModTime of an object + version
	Endpoint string `json:"endpoint"`

	// BlockSize indicates the maximum object size below which
	// data is cached and fetched remotely from DRAM.