Update minio-go

vendor/github.com/minio/minio-go/api-get-options.go

@@ -0,0 +1,126 @@
+/*
+ * 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.
+ * 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 (
+	"fmt"
+	"net/http"
+	"time"
+
+	"github.com/minio/minio-go/pkg/encrypt"
+)
+
+// GetObjectOptions are used to specify additional headers or options
+// during GET requests.
+type GetObjectOptions struct {
+	headers map[string]string
+
+	Materials encrypt.Materials
+}
+
+// StatObjectOptions are used to specify additional headers or options
+// during GET info/stat requests.
+type StatObjectOptions struct {
+	GetObjectOptions
+}
+
+// Header returns the http.Header representation of the GET options.
+func (o GetObjectOptions) Header() http.Header {
+	headers := make(http.Header, len(o.headers))
+	for k, v := range o.headers {
+		headers.Set(k, v)
+	}
+	return headers
+}
+
+// Set adds a key value pair to the options. The
+// key-value pair will be part of the HTTP GET request
+// headers.
+func (o *GetObjectOptions) Set(key, value string) {
+	if o.headers == nil {
+		o.headers = make(map[string]string)
+	}
+	o.headers[http.CanonicalHeaderKey(key)] = value
+}
+
+// SetMatchETag - set match etag.
+func (o *GetObjectOptions) SetMatchETag(etag string) error {
+	if etag == "" {
+		return ErrInvalidArgument("ETag cannot be empty.")
+	}
+	o.Set("If-Match", "\""+etag+"\"")
+	return nil
+}
+
+// SetMatchETagExcept - set match etag except.
+func (o *GetObjectOptions) SetMatchETagExcept(etag string) error {
+	if etag == "" {
+		return ErrInvalidArgument("ETag cannot be empty.")
+	}
+	o.Set("If-None-Match", "\""+etag+"\"")
+	return nil
+}
+
+// SetUnmodified - set unmodified time since.
+func (o *GetObjectOptions) SetUnmodified(modTime time.Time) error {
+	if modTime.IsZero() {
+		return ErrInvalidArgument("Modified since cannot be empty.")
+	}
+	o.Set("If-Unmodified-Since", modTime.Format(http.TimeFormat))
+	return nil
+}
+
+// SetModified - set modified time since.
+func (o *GetObjectOptions) SetModified(modTime time.Time) error {
+	if modTime.IsZero() {
+		return ErrInvalidArgument("Modified since cannot be empty.")
+	}
+	o.Set("If-Modified-Since", modTime.Format(http.TimeFormat))
+	return nil
+}
+
+// SetRange - set the start and end offset of the object to be read.
+// See https://tools.ietf.org/html/rfc7233#section-3.1 for reference.
+func (o *GetObjectOptions) SetRange(start, end int64) error {
+	switch {
+	case start == 0 && end < 0:
+		// Read last '-end' bytes. `bytes=-N`.
+		o.Set("Range", fmt.Sprintf("bytes=%d", end))
+	case 0 < start && end == 0:
+		// Read everything starting from offset
+		// 'start'. `bytes=N-`.
+		o.Set("Range", fmt.Sprintf("bytes=%d-", start))
+	case 0 <= start && start <= end:
+		// Read everything starting at 'start' till the
+		// 'end'. `bytes=N-M`
+		o.Set("Range", fmt.Sprintf("bytes=%d-%d", start, end))
+	default:
+		// All other cases such as
+		// bytes=-3-
+		// bytes=5-3
+		// bytes=-2-4
+		// bytes=-3-0
+		// bytes=-3--2
+		// are invalid.
+		return ErrInvalidArgument(
+			fmt.Sprintf(
+				"Invalid range specified: start=%d end=%d",
+				start, end))
+	}
+	return nil
+}