mirror of
https://github.com/octoleo/restic.git
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129 lines
3.6 KiB
Go
129 lines
3.6 KiB
Go
/*
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* Minio Go Library for Amazon S3 Compatible Cloud Storage
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* Copyright 2015-2017 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package minio
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import (
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"fmt"
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"net/http"
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"time"
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"github.com/minio/minio-go/pkg/encrypt"
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)
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// GetObjectOptions are used to specify additional headers or options
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// during GET requests.
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type GetObjectOptions struct {
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headers map[string]string
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ServerSideEncryption encrypt.ServerSide
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}
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// StatObjectOptions are used to specify additional headers or options
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// during GET info/stat requests.
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type StatObjectOptions struct {
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GetObjectOptions
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}
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// Header returns the http.Header representation of the GET options.
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func (o GetObjectOptions) Header() http.Header {
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headers := make(http.Header, len(o.headers))
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for k, v := range o.headers {
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headers.Set(k, v)
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}
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if o.ServerSideEncryption != nil && o.ServerSideEncryption.Type() == encrypt.SSEC {
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o.ServerSideEncryption.Marshal(headers)
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}
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return headers
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}
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// Set adds a key value pair to the options. The
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// key-value pair will be part of the HTTP GET request
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// headers.
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func (o *GetObjectOptions) Set(key, value string) {
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if o.headers == nil {
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o.headers = make(map[string]string)
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}
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o.headers[http.CanonicalHeaderKey(key)] = value
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}
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// SetMatchETag - set match etag.
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func (o *GetObjectOptions) SetMatchETag(etag string) error {
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if etag == "" {
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return ErrInvalidArgument("ETag cannot be empty.")
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}
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o.Set("If-Match", "\""+etag+"\"")
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return nil
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}
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// SetMatchETagExcept - set match etag except.
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func (o *GetObjectOptions) SetMatchETagExcept(etag string) error {
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if etag == "" {
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return ErrInvalidArgument("ETag cannot be empty.")
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}
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o.Set("If-None-Match", "\""+etag+"\"")
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return nil
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}
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// SetUnmodified - set unmodified time since.
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func (o *GetObjectOptions) SetUnmodified(modTime time.Time) error {
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if modTime.IsZero() {
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return ErrInvalidArgument("Modified since cannot be empty.")
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}
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o.Set("If-Unmodified-Since", modTime.Format(http.TimeFormat))
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return nil
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}
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// SetModified - set modified time since.
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func (o *GetObjectOptions) SetModified(modTime time.Time) error {
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if modTime.IsZero() {
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return ErrInvalidArgument("Modified since cannot be empty.")
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}
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o.Set("If-Modified-Since", modTime.Format(http.TimeFormat))
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return nil
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}
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// SetRange - set the start and end offset of the object to be read.
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// See https://tools.ietf.org/html/rfc7233#section-3.1 for reference.
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func (o *GetObjectOptions) SetRange(start, end int64) error {
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switch {
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case start == 0 && end < 0:
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// Read last '-end' bytes. `bytes=-N`.
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o.Set("Range", fmt.Sprintf("bytes=%d", end))
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case 0 < start && end == 0:
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// Read everything starting from offset
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// 'start'. `bytes=N-`.
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o.Set("Range", fmt.Sprintf("bytes=%d-", start))
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case 0 <= start && start <= end:
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// Read everything starting at 'start' till the
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// 'end'. `bytes=N-M`
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o.Set("Range", fmt.Sprintf("bytes=%d-%d", start, end))
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default:
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// All other cases such as
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// bytes=-3-
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// bytes=5-3
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// bytes=-2-4
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// bytes=-3-0
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// bytes=-3--2
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// are invalid.
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return ErrInvalidArgument(
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fmt.Sprintf(
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"Invalid range specified: start=%d end=%d",
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start, end))
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}
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return nil
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}
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