/
mirror-url.go
168 lines (149 loc) · 5.11 KB
/
mirror-url.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
/*
* Minio Client (C) 2015 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 main
import (
"fmt"
"strings"
"github.com/minio/cli"
"github.com/minio/mc/pkg/client"
"github.com/minio/minio-xl/pkg/probe"
)
type mirrorURLs struct {
SourceAlias string
SourceContent *client.Content
TargetAlias string
TargetContent *client.Content
Error *probe.Error `json:"-"`
}
func (m mirrorURLs) isEmpty() bool {
if m.SourceContent == nil && m.TargetContent == nil && m.Error == nil {
return true
}
if m.SourceContent.Size == 0 && m.TargetContent == nil && m.Error == nil {
return true
}
return false
}
//
// * MIRROR ARGS - VALID CASES
// =========================
// mirror(d1..., d2) -> []mirror(d1/f, d2/d1/f)
// checkMirrorSyntax(URLs []string)
func checkMirrorSyntax(ctx *cli.Context) {
if len(ctx.Args()) != 2 {
cli.ShowCommandHelpAndExit(ctx, "mirror", 1) // last argument is exit code.
}
// extract URLs.
URLs := ctx.Args()
srcURL := URLs[0]
tgtURL := URLs[1]
/****** Generic rules *******/
_, srcContent, err := url2Stat(srcURL)
// incomplete uploads are not necessary for copy operation, no need to verify for them.
isIncomplete := false
if err != nil && !isURLPrefixExists(srcURL, isIncomplete) {
fatalIf(err.Trace(srcURL), "Unable to stat source ‘"+srcURL+"’.")
}
if err == nil && !srcContent.Type.IsDir() {
fatalIf(errInvalidArgument().Trace(srcContent.URL.String(), srcContent.Type.String()), fmt.Sprintf("Source ‘%s’ is not a folder. Only folders are supported by mirror command.", srcURL))
}
if len(tgtURL) == 0 && tgtURL == "" {
fatalIf(errInvalidArgument().Trace(), "Invalid target arguments to mirror command.")
}
url := client.NewURL(tgtURL)
if url.Host != "" {
if !isURLVirtualHostStyle(url.Host) {
if url.Path == string(url.Separator) {
fatalIf(errInvalidArgument().Trace(tgtURL),
fmt.Sprintf("Target ‘%s’ does not contain bucket name.", tgtURL))
}
}
}
_, _, err = url2Stat(tgtURL)
// we die on any error other than client.PathNotFound - destination directory need not exist.
if _, ok := err.ToGoError().(client.PathNotFound); !ok {
fatalIf(err.Trace(tgtURL), fmt.Sprintf("Unable to stat %s", tgtURL))
}
}
func deltaSourceTargets(sourceURL string, targetURL string, isForce bool, mirrorURLsCh chan<- mirrorURLs) {
// source and targets are always directories
sourceSeparator := string(client.NewURL(sourceURL).Separator)
if !strings.HasSuffix(sourceURL, sourceSeparator) {
sourceURL = sourceURL + sourceSeparator
}
targetSeparator := string(client.NewURL(targetURL).Separator)
if !strings.HasSuffix(targetURL, targetSeparator) {
targetURL = targetURL + targetSeparator
}
// Extract alias and expanded URL
sourceAlias, sourceURL, _ := mustExpandAlias(sourceURL)
targetAlias, targetURL, _ := mustExpandAlias(targetURL)
defer close(mirrorURLsCh)
objectDifferenceTarget, err := objectDifferenceFactory(targetAlias, targetURL)
if err != nil {
mirrorURLsCh <- mirrorURLs{Error: err.Trace(targetAlias, targetURL)}
return
}
sourceClient, err := newClientFromAlias(sourceAlias, sourceURL)
if err != nil {
mirrorURLsCh <- mirrorURLs{Error: err.Trace(sourceAlias, sourceURL)}
return
}
for sourceContent := range sourceClient.List(true, false) {
if sourceContent.Err != nil {
mirrorURLsCh <- mirrorURLs{
Error: sourceContent.Err.Trace(sourceClient.GetURL().String()),
}
continue
}
if sourceContent.Type.IsDir() {
continue
}
suffix := strings.TrimPrefix(sourceContent.URL.String(), sourceURL)
differ, err := objectDifferenceTarget(suffix, sourceContent.Type, sourceContent.Size)
if err != nil {
mirrorURLsCh <- mirrorURLs{Error: err.Trace(sourceContent.URL.String())}
continue
}
if differ == differNone {
// no difference, continue
continue
}
if differ == differType {
mirrorURLsCh <- mirrorURLs{Error: errInvalidTarget(suffix)}
continue
}
if differ == differSize && !isForce {
// size differs and force not set
mirrorURLsCh <- mirrorURLs{Error: errOverWriteNotAllowed(sourceContent.URL.String())}
continue
}
// either available only in source or size differs and force is set
targetPath := urlJoinPath(targetURL, suffix)
targetContent := &client.Content{URL: *client.NewURL(targetPath)}
mirrorURLsCh <- mirrorURLs{
SourceAlias: sourceAlias,
SourceContent: sourceContent,
TargetAlias: targetAlias,
TargetContent: targetContent,
}
}
}
func prepareMirrorURLs(sourceURL string, targetURL string, isForce bool) <-chan mirrorURLs {
mirrorURLsCh := make(chan mirrorURLs)
go deltaSourceTargets(sourceURL, targetURL, isForce, mirrorURLsCh)
return mirrorURLsCh
}