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tools.go
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tools.go
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/*
* Copyright (c) 2018. Abstrium SAS <team (at) pydio.com>
* This file is part of Pydio Cells.
*
* Pydio Cells is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Pydio Cells is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with Pydio Cells. If not, see <http://www.gnu.org/licenses/>.
*
* The latest code can be found at <https://pydio.com>.
*/
// Package update provides connection to a remote update server for upgrading cells binary
package update
import (
"context"
"crypto"
"crypto/rsa"
"encoding/asn1"
"encoding/base64"
"encoding/json"
"encoding/pem"
"fmt"
"io/ioutil"
"math"
"net/http"
"net/url"
"os"
"path/filepath"
"runtime"
"sort"
"strings"
"github.com/golang/protobuf/jsonpb"
"github.com/hashicorp/go-version"
update2 "github.com/inconshreveable/go-update"
"github.com/kardianos/osext"
"github.com/micro/go-micro/errors"
"go.uber.org/zap"
"github.com/pydio/cells/common"
"github.com/pydio/cells/common/config"
"github.com/pydio/cells/common/log"
"github.com/pydio/cells/common/proto/update"
"github.com/pydio/cells/common/service"
"github.com/pydio/cells/common/utils/filesystem"
"github.com/pydio/cells/common/utils/net"
)
// LoadUpdates will post a Json query to the update server to detect if there are any
// updates available
func LoadUpdates(ctx context.Context, conf common.ConfigValues, request *update.UpdateRequest) ([]*update.Package, error) {
urlConf := conf.String("updateUrl")
if urlConf == "" {
return nil, errors.BadRequest(common.SERVICE_UPDATE, "cannot find update url")
}
parsed, e := url.Parse(urlConf)
if e != nil {
return nil, errors.BadRequest(common.SERVICE_UPDATE, e.Error())
}
if strings.Trim(parsed.Path, "/") == "" {
parsed.Path = "/a/update-server"
}
channel := conf.String("channel")
if channel == "" {
channel = "stable"
}
// Set default values
if request.PackageName == "" {
request.PackageName = common.PackageType
}
request.Channel = channel
if request.PackageName != common.PackageType {
// This is an "upgrade" (from one package to another)
// compute a version lower than current to get the current in the results set
segments := common.Version().Segments()
lower := service.ValidVersion(fmt.Sprintf("%v.%v.%v", math.Max(float64(segments[0]-1), 0), math.Max(float64(segments[1]-1), 0), 0))
log.Logger(ctx).Debug("Sending a lower version", zap.String("v", lower.String()))
request.CurrentVersion = lower.String()
} else {
// This is an "update" : send current version to get the more recent ones
request.CurrentVersion = common.Version().String()
}
request.GOOS = runtime.GOOS
request.GOARCH = runtime.GOARCH
log.Logger(ctx).Debug("Posting Request for update", zap.Any("request", request))
marshaller := jsonpb.Marshaler{}
jsonReq, _ := marshaller.MarshalToString(request)
postRequest, err := http.NewRequest("POST", strings.TrimRight(parsed.String(), "/")+"/", strings.NewReader(string(jsonReq)))
if err != nil {
return nil, err
}
postRequest.Header.Add("Content-type", "application/json")
hC, e := getHttpClient()
if e != nil {
return nil, e
}
response, err := hC.Do(postRequest)
if err != nil {
return nil, err
}
if response.StatusCode != 200 {
rErr := fmt.Errorf("could not connect to the update server, error code was %d", response.StatusCode)
if response.StatusCode == 500 {
var jsonErr struct {
Title string
Detail string
}
data, _ := ioutil.ReadAll(response.Body)
if e := json.Unmarshal(data, &jsonErr); e == nil {
rErr = fmt.Errorf("failed connecting to the update server (%s), error code %d", jsonErr.Title, response.StatusCode)
}
}
return nil, rErr
}
var updateResponse update.UpdateResponse
if e := jsonpb.Unmarshal(response.Body, &updateResponse); e != nil {
return nil, e
}
if request.LicenseInfo != nil {
lic, ok := request.LicenseInfo["Key"]
save, sOk := request.LicenseInfo["Save"]
if ok && sOk && save == "true" {
// Save license now : the check for update including license key passed without error,
// this license must thus be valid
log.Logger(ctx).Info("Saving LicenseKey to file now", zap.String("lic", lic))
filePath := filepath.Join(config.ApplicationWorkingDir(), "pydio-license")
if err := ioutil.WriteFile(filePath, []byte(lic), 0644); err != nil {
return nil, fmt.Errorf("could not save license file to %s (%s), aborting upgrade", filePath, err.Error())
}
}
}
// When upgrading, filter out versions lesser than current
if request.PackageName != common.PackageType {
var bins []*update.Package
for _, b := range updateResponse.AvailableBinaries {
if service.ValidVersion(b.GetVersion()).LessThan(common.Version()) {
continue
}
bins = append(bins, b)
}
updateResponse.AvailableBinaries = bins
}
// Sort by version using hashicorp sorting (X.X.X-rc should appear before X.X.X)
sort.Slice(updateResponse.AvailableBinaries, func(i, j int) bool {
va, _ := version.NewVersion(updateResponse.AvailableBinaries[i].Version)
vb, _ := version.NewVersion(updateResponse.AvailableBinaries[j].Version)
return va.LessThan(vb)
})
return updateResponse.AvailableBinaries, nil
}
// ApplyUpdate uses the info of an update.Package to download the binary and replace
// the current running binary. A restart is necessary afterward.
// The dryRun option will download the binary and just put it in the /tmp folder
func ApplyUpdate(ctx context.Context, p *update.Package, conf common.ConfigValues, dryRun bool, pgChan chan float64, doneChan chan bool, errorChan chan error) {
defer func() {
close(doneChan)
}()
dlRequest, err := http.NewRequest("GET", p.BinaryURL, nil)
if err != nil {
errorChan <- err
return
}
hC, e := getHttpClient()
if e != nil {
errorChan <- e
return
}
if resp, err := hC.Do(dlRequest); err != nil {
errorChan <- err
return
} else {
defer resp.Body.Close()
if resp.StatusCode != 200 {
plain, _ := ioutil.ReadAll(resp.Body)
errorChan <- errors.New("binary.download.error", "Error while downloading binary:"+string(plain), int32(resp.StatusCode))
return
}
targetPath := ""
if dryRun {
targetPath = filepath.Join(os.TempDir(), "pydio-update")
}
if p.BinaryChecksum == "" || p.BinarySignature == "" {
errorChan <- fmt.Errorf("Missing checksum and signature infos")
return
}
checksum, e := base64.StdEncoding.DecodeString(p.BinaryChecksum)
if e != nil {
errorChan <- e
return
}
signature, e := base64.StdEncoding.DecodeString(p.BinarySignature)
if e != nil {
errorChan <- e
return
}
pKey, ok := conf.Get("publicKey").(string)
if !ok || pKey == "" {
errorChan <- fmt.Errorf("cannot find public key to verify binary integrity")
return
}
block, _ := pem.Decode([]byte(pKey))
if block == nil {
errorChan <- fmt.Errorf("cannot decode public key")
return
}
var pubKey rsa.PublicKey
if _, err := asn1.Unmarshal(block.Bytes, &pubKey); err != nil {
errorChan <- err
return
}
// Write previous version inside the same folder
if targetPath == "" {
exe, er := osext.Executable()
if er != nil {
errorChan <- err
return
}
targetPath = exe
}
var backupFile string
if runtime.GOOS == "windows" {
suffix := filepath.Ext(targetPath)
backupFile = fmt.Sprintf("%s-v%s%s", strings.TrimRight(targetPath, suffix), common.Version().String(), suffix)
} else {
backupFile = fmt.Sprintf("%s-v%s", targetPath, common.Version().String())
}
reader := net.BodyWithProgressMonitor(resp, pgChan, nil)
er := update2.Apply(reader, update2.Options{
Checksum: checksum,
Signature: signature,
TargetPath: targetPath,
OldSavePath: backupFile,
Hash: crypto.SHA256,
PublicKey: &pubKey,
Verifier: update2.NewRSAVerifier(),
})
if er != nil {
errorChan <- er
}
// Now try to move previous version to the services folder. Do not break on error, just Warn in the logs.
dataDir, _ := config.ServiceDataDir(common.SERVICE_GRPC_NAMESPACE_ + common.SERVICE_UPDATE)
backupPath := filepath.Join(dataDir, filepath.Base(backupFile))
if err := filesystem.SafeRenameFile(backupFile, backupPath); err != nil {
log.Logger(ctx).Warn("Update successfully applied but previous binary could not be moved to backup folder", zap.Error(err))
}
return
}
}
func getHttpClient() (*http.Client, error) {
hC := http.DefaultClient
if proxy := os.Getenv("CELLS_UPDATE_HTTP_PROXY"); proxy != "" {
proxyUrl, err := url.Parse(proxy)
if err != nil {
return nil, fmt.Errorf("cannot parse CELLS_UPDATE_HTTP_PROXY : %s", err.Error())
}
hC = &http.Client{Transport: &http.Transport{Proxy: http.ProxyURL(proxyUrl)}}
}
return hC, nil
}