Vendor dependencies with dep

vendor/github.com/minio/minio-go/request-headers.go

@@ -0,0 +1,111 @@
+/*
+ * Minio Go Library for Amazon S3 Compatible Cloud Storage (C) 2016-17 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"
+)
+
+// RequestHeaders - implement methods for setting special
+// request headers for GET, HEAD object operations.
+// http://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectGET.html
+type RequestHeaders struct {
+	http.Header
+}
+
+// NewGetReqHeaders - initializes a new request headers for GET request.
+func NewGetReqHeaders() RequestHeaders {
+	return RequestHeaders{
+		Header: make(http.Header),
+	}
+}
+
+// NewHeadReqHeaders - initializes a new request headers for HEAD request.
+func NewHeadReqHeaders() RequestHeaders {
+	return RequestHeaders{
+		Header: make(http.Header),
+	}
+}
+
+// SetMatchETag - set match etag.
+func (c RequestHeaders) SetMatchETag(etag string) error {
+	if etag == "" {
+		return ErrInvalidArgument("ETag cannot be empty.")
+	}
+	c.Set("If-Match", "\""+etag+"\"")
+	return nil
+}
+
+// SetMatchETagExcept - set match etag except.
+func (c RequestHeaders) SetMatchETagExcept(etag string) error {
+	if etag == "" {
+		return ErrInvalidArgument("ETag cannot be empty.")
+	}
+	c.Set("If-None-Match", "\""+etag+"\"")
+	return nil
+}
+
+// SetUnmodified - set unmodified time since.
+func (c RequestHeaders) SetUnmodified(modTime time.Time) error {
+	if modTime.IsZero() {
+		return ErrInvalidArgument("Modified since cannot be empty.")
+	}
+	c.Set("If-Unmodified-Since", modTime.Format(http.TimeFormat))
+	return nil
+}
+
+// SetModified - set modified time since.
+func (c RequestHeaders) SetModified(modTime time.Time) error {
+	if modTime.IsZero() {
+		return ErrInvalidArgument("Modified since cannot be empty.")
+	}
+	c.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 (c RequestHeaders) SetRange(start, end int64) error {
+	switch {
+	case start == 0 && end < 0:
+		// Read last '-end' bytes. `bytes=-N`.
+		c.Set("Range", fmt.Sprintf("bytes=%d", end))
+	case 0 < start && end == 0:
+		// Read everything starting from offset
+		// 'start'. `bytes=N-`.
+		c.Set("Range", fmt.Sprintf("bytes=%d-", start))
+	case 0 <= start && start <= end:
+		// Read everything starting at 'start' till the
+		// 'end'. `bytes=N-M`
+		c.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
+}