/
common-methods.go
194 lines (171 loc) · 5.42 KB
/
common-methods.go
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/*
* 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 (
"io"
"os"
"runtime"
"sync"
"github.com/minio/mc/pkg/client"
"github.com/minio/mc/pkg/client/fs"
"github.com/minio/mc/pkg/client/s3"
"github.com/minio/minio/pkg/iodine"
)
// getSource gets a reader from URL<
func getSource(sourceURL string) (reader io.ReadCloser, length int64, err error) {
sourceClnt, err := source2Client(sourceURL)
if err != nil {
return nil, 0, iodine.New(err, map[string]string{"failedURL": sourceURL})
}
return sourceClnt.GetObject(0, 0)
}
// putTarget writes to URL from reader.
func putTarget(targetURL string, length int64, reader io.Reader) error {
targetClnt, err := target2Client(targetURL)
if err != nil {
return iodine.New(err, nil)
}
err = targetClnt.PutObject(length, reader)
if err != nil {
return iodine.New(err, map[string]string{"failedURL": targetURL})
}
return nil
}
// putTargets writes to URL from reader.
func putTargets(targetURLs []string, length int64, reader io.Reader) <-chan error {
var errorCh = make(chan error)
go func() {
defer close(errorCh)
tgtReaders := make([]io.ReadCloser, len(targetURLs))
tgtWriters := make([]io.WriteCloser, len(targetURLs))
tgtClients := make([]client.Client, len(targetURLs))
for i, targetURL := range targetURLs {
tgtReaders[i], tgtWriters[i] = io.Pipe()
tgtClient, err := target2Client(targetURL)
if err != nil {
errorCh <- iodine.New(err, nil)
continue
}
tgtClients[i] = tgtClient
}
var wg sync.WaitGroup
writers := make([]io.Writer, len(targetURLs))
for i, writer := range tgtWriters {
writers[i] = io.Writer(writer)
}
multiTgtWriter := io.MultiWriter(writers...)
go func() {
for _, tgtWriter := range tgtWriters {
defer tgtWriter.Close()
}
io.CopyN(multiTgtWriter, reader, length)
}()
for i := range tgtClients {
wg.Add(1)
go func(targetClient client.Client, reader io.Reader, errorCh chan error) {
defer wg.Done()
err := targetClient.PutObject(length, reader)
if err != nil {
errorCh <- iodine.New(err, map[string]string{"failedURL": targetClient.URL().String()})
}
}(tgtClients[i], tgtReaders[i], errorCh)
}
wg.Wait()
}()
return errorCh
}
// getNewClient gives a new client interface
func getNewClient(urlStr string, auth *hostConfig) (clnt client.Client, err error) {
url, err := client.Parse(urlStr)
if err != nil {
return nil, iodine.New(errInvalidURL{URL: urlStr}, map[string]string{"URL": urlStr})
}
switch url.Type {
case client.Object: // Minio and S3 compatible object storage
if auth == nil {
return nil, iodine.New(errInvalidArgument{}, nil)
}
s3Config := new(s3.Config)
s3Config.AccessKeyID = func() string {
if auth.AccessKeyID == globalAccessKeyID {
return ""
}
return auth.AccessKeyID
}()
s3Config.SecretAccessKey = func() string {
if auth.SecretAccessKey == globalSecretAccessKey {
return ""
}
return auth.SecretAccessKey
}()
s3Config.AppName = "Minio"
s3Config.AppVersion = getVersion()
s3Config.AppComments = []string{os.Args[0], runtime.GOOS, runtime.GOARCH}
s3Config.HostURL = urlStr
s3Config.Debug = globalDebugFlag
return s3.New(s3Config)
case client.Filesystem:
return fs.New(urlStr)
}
return nil, iodine.New(errInvalidURL{URL: urlStr}, nil)
}
// url2Stat - Returns client, config and its stat Content from the URL
func url2Stat(urlStr string) (client client.Client, content *client.Content, err error) {
client, err = url2Client(urlStr)
if err != nil {
return nil, nil, iodine.New(err, map[string]string{"URL": urlStr})
}
content, err = client.Stat()
if err != nil {
return nil, nil, iodine.New(err, map[string]string{"URL": urlStr})
}
return client, content, nil
}
func url2Client(url string) (client.Client, error) {
// Empty source arg?
urlParse, err := client.Parse(url)
if err != nil {
return nil, iodine.New(err, map[string]string{"URL": url})
}
if urlParse.Path == "" {
return nil, iodine.New(errInvalidURL{URL: url}, map[string]string{"URL": url})
}
urlonfig, err := getHostConfig(url)
if err != nil {
return nil, iodine.New(err, map[string]string{"URL": url})
}
client, err := getNewClient(url, urlonfig)
if err != nil {
return nil, iodine.New(err, map[string]string{"URL": url})
}
return client, nil
}
// source2Client returns client and hostconfig objects from the source URL.
func source2Client(sourceURL string) (client.Client, error) {
sourceClient, err := url2Client(sourceURL)
if err != nil {
return nil, iodine.New(errInvalidSource{URL: sourceURL}, map[string]string{"URL": sourceURL})
}
return sourceClient, nil
}
// target2Client returns client and hostconfig objects from the target URL.
func target2Client(targetURL string) (client.Client, error) {
targetClient, err := url2Client(targetURL)
if err != nil {
return nil, iodine.New(errInvalidTarget{URL: targetURL}, map[string]string{"URL": targetURL})
}
return targetClient, nil
}