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// Copyright (c) 2017-present Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.
package utils
import (
"bytes"
"io/ioutil"
"net/http"
"os"
"path/filepath"
l4g "github.com/alecthomas/log4go"
s3 "github.com/minio/minio-go"
"github.com/minio/minio-go/pkg/credentials"
"github.com/mattermost/mattermost-server/model"
)
const (
TEST_FILE_PATH = "/testfile"
)
// Similar to s3.New() but allows initialization of signature v2 or signature v4 client.
// If signV2 input is false, function always returns signature v4.
//
// Additionally this function also takes a user defined region, if set
// disables automatic region lookup.
func s3New(endpoint, accessKey, secretKey string, secure bool, signV2 bool, region string) (*s3.Client, error) {
var creds *credentials.Credentials
if signV2 {
creds = credentials.NewStatic(accessKey, secretKey, "", credentials.SignatureV2)
} else {
creds = credentials.NewStatic(accessKey, secretKey, "", credentials.SignatureV4)
}
s3Clnt, err := s3.NewWithCredentials(endpoint, creds, secure, region)
if err != nil {
return nil, err
}
if *Cfg.FileSettings.AmazonS3Trace {
s3Clnt.TraceOn(os.Stdout)
}
return s3Clnt, nil
}
func TestFileConnection() *model.AppError {
if *Cfg.FileSettings.DriverName == model.IMAGE_DRIVER_S3 {
endpoint := Cfg.FileSettings.AmazonS3Endpoint
accessKey := Cfg.FileSettings.AmazonS3AccessKeyId
secretKey := Cfg.FileSettings.AmazonS3SecretAccessKey
secure := *Cfg.FileSettings.AmazonS3SSL
signV2 := *Cfg.FileSettings.AmazonS3SignV2
region := Cfg.FileSettings.AmazonS3Region
bucket := Cfg.FileSettings.AmazonS3Bucket
s3Clnt, err := s3New(endpoint, accessKey, secretKey, secure, signV2, region)
if err != nil {
return model.NewLocAppError("TestFileConnection", "Bad connection to S3 or minio.", nil, err.Error())
}
exists, err := s3Clnt.BucketExists(bucket)
if err != nil {
return model.NewLocAppError("TestFileConnection", "Error checking if bucket exists.", nil, err.Error())
}
if !exists {
l4g.Warn("Bucket specified does not exist. Attempting to create...")
err := s3Clnt.MakeBucket(bucket, region)
if err != nil {
l4g.Error("Unable to create bucket.")
return model.NewAppError("TestFileConnection", "Unable to create bucket", nil, err.Error(), http.StatusInternalServerError)
}
}
l4g.Info("Connection to S3 or minio is good. Bucket exists.")
} else if *Cfg.FileSettings.DriverName == model.IMAGE_DRIVER_LOCAL {
f := []byte("testingwrite")
if err := writeFileLocally(f, Cfg.FileSettings.Directory+TEST_FILE_PATH); err != nil {
return model.NewAppError("TestFileConnection", "Don't have permissions to write to local path specified or other error.", nil, err.Error(), http.StatusInternalServerError)
}
os.Remove(Cfg.FileSettings.Directory + TEST_FILE_PATH)
l4g.Info("Able to write files to local storage.")
} else {
return model.NewLocAppError("TestFileConnection", "No file driver selected.", nil, "")
}
return nil
}
func ReadFile(path string) ([]byte, *model.AppError) {
if *Cfg.FileSettings.DriverName == model.IMAGE_DRIVER_S3 {
endpoint := Cfg.FileSettings.AmazonS3Endpoint
accessKey := Cfg.FileSettings.AmazonS3AccessKeyId
secretKey := Cfg.FileSettings.AmazonS3SecretAccessKey
secure := *Cfg.FileSettings.AmazonS3SSL
signV2 := *Cfg.FileSettings.AmazonS3SignV2
region := Cfg.FileSettings.AmazonS3Region
s3Clnt, err := s3New(endpoint, accessKey, secretKey, secure, signV2, region)
if err != nil {
return nil, model.NewLocAppError("ReadFile", "api.file.read_file.s3.app_error", nil, err.Error())
}
bucket := Cfg.FileSettings.AmazonS3Bucket
minioObject, err := s3Clnt.GetObject(bucket, path)
defer minioObject.Close()
if err != nil {
return nil, model.NewLocAppError("ReadFile", "api.file.read_file.s3.app_error", nil, err.Error())
}
if f, err := ioutil.ReadAll(minioObject); err != nil {
return nil, model.NewLocAppError("ReadFile", "api.file.read_file.s3.app_error", nil, err.Error())
} else {
return f, nil
}
} else if *Cfg.FileSettings.DriverName == model.IMAGE_DRIVER_LOCAL {
if f, err := ioutil.ReadFile(Cfg.FileSettings.Directory + path); err != nil {
return nil, model.NewLocAppError("ReadFile", "api.file.read_file.reading_local.app_error", nil, err.Error())
} else {
return f, nil
}
} else {
return nil, model.NewAppError("ReadFile", "api.file.read_file.configured.app_error", nil, "", http.StatusNotImplemented)
}
}
func MoveFile(oldPath, newPath string) *model.AppError {
if *Cfg.FileSettings.DriverName == model.IMAGE_DRIVER_S3 {
endpoint := Cfg.FileSettings.AmazonS3Endpoint
accessKey := Cfg.FileSettings.AmazonS3AccessKeyId
secretKey := Cfg.FileSettings.AmazonS3SecretAccessKey
secure := *Cfg.FileSettings.AmazonS3SSL
signV2 := *Cfg.FileSettings.AmazonS3SignV2
region := Cfg.FileSettings.AmazonS3Region
encrypt := false
if *Cfg.FileSettings.AmazonS3SSE && IsLicensed() && *License().Features.Compliance {
encrypt = true
}
s3Clnt, err := s3New(endpoint, accessKey, secretKey, secure, signV2, region)
if err != nil {
return model.NewLocAppError("moveFile", "api.file.write_file.s3.app_error", nil, err.Error())
}
bucket := Cfg.FileSettings.AmazonS3Bucket
source := s3.NewSourceInfo(bucket, oldPath, nil)
destination, err := s3.NewDestinationInfo(bucket, newPath, nil, CopyMetadata(encrypt))
if err != nil {
return model.NewLocAppError("moveFile", "api.file.write_file.s3.app_error", nil, err.Error())
}
if err = s3Clnt.CopyObject(destination, source); err != nil {
return model.NewLocAppError("moveFile", "api.file.move_file.delete_from_s3.app_error", nil, err.Error())
}
if err = s3Clnt.RemoveObject(bucket, oldPath); err != nil {
return model.NewLocAppError("moveFile", "api.file.move_file.delete_from_s3.app_error", nil, err.Error())
}
} else if *Cfg.FileSettings.DriverName == model.IMAGE_DRIVER_LOCAL {
if err := os.MkdirAll(filepath.Dir(Cfg.FileSettings.Directory+newPath), 0774); err != nil {
return model.NewLocAppError("moveFile", "api.file.move_file.rename.app_error", nil, err.Error())
}
if err := os.Rename(Cfg.FileSettings.Directory+oldPath, Cfg.FileSettings.Directory+newPath); err != nil {
return model.NewLocAppError("moveFile", "api.file.move_file.rename.app_error", nil, err.Error())
}
} else {
return model.NewLocAppError("moveFile", "api.file.move_file.configured.app_error", nil, "")
}
return nil
}
func WriteFile(f []byte, path string) *model.AppError {
if *Cfg.FileSettings.DriverName == model.IMAGE_DRIVER_S3 {
endpoint := Cfg.FileSettings.AmazonS3Endpoint
accessKey := Cfg.FileSettings.AmazonS3AccessKeyId
secretKey := Cfg.FileSettings.AmazonS3SecretAccessKey
secure := *Cfg.FileSettings.AmazonS3SSL
signV2 := *Cfg.FileSettings.AmazonS3SignV2
region := Cfg.FileSettings.AmazonS3Region
encrypt := false
if *Cfg.FileSettings.AmazonS3SSE && IsLicensed() && *License().Features.Compliance {
encrypt = true
}
s3Clnt, err := s3New(endpoint, accessKey, secretKey, secure, signV2, region)
if err != nil {
return model.NewLocAppError("WriteFile", "api.file.write_file.s3.app_error", nil, err.Error())
}
bucket := Cfg.FileSettings.AmazonS3Bucket
ext := filepath.Ext(path)
metaData := S3Metadata(encrypt, "binary/octet-stream")
if model.IsFileExtImage(ext) {
metaData = S3Metadata(encrypt, model.GetImageMimeType(ext))
}
_, err = s3Clnt.PutObjectWithMetadata(bucket, path, bytes.NewReader(f), metaData, nil)
if err != nil {
return model.NewLocAppError("WriteFile", "api.file.write_file.s3.app_error", nil, err.Error())
}
} else if *Cfg.FileSettings.DriverName == model.IMAGE_DRIVER_LOCAL {
if err := writeFileLocally(f, Cfg.FileSettings.Directory+path); err != nil {
return err
}
} else {
return model.NewLocAppError("WriteFile", "api.file.write_file.configured.app_error", nil, "")
}
return nil
}
func writeFileLocally(f []byte, path string) *model.AppError {
if err := os.MkdirAll(filepath.Dir(path), 0774); err != nil {
directory, _ := filepath.Abs(filepath.Dir(path))
return model.NewLocAppError("WriteFile", "api.file.write_file_locally.create_dir.app_error", nil, "directory="+directory+", err="+err.Error())
}
if err := ioutil.WriteFile(path, f, 0644); err != nil {
return model.NewLocAppError("WriteFile", "api.file.write_file_locally.writing.app_error", nil, err.Error())
}
return nil
}
func RemoveFile(path string) *model.AppError {
if *Cfg.FileSettings.DriverName == model.IMAGE_DRIVER_S3 {
endpoint := Cfg.FileSettings.AmazonS3Endpoint
accessKey := Cfg.FileSettings.AmazonS3AccessKeyId
secretKey := Cfg.FileSettings.AmazonS3SecretAccessKey
secure := *Cfg.FileSettings.AmazonS3SSL
signV2 := *Cfg.FileSettings.AmazonS3SignV2
region := Cfg.FileSettings.AmazonS3Region
s3Clnt, err := s3New(endpoint, accessKey, secretKey, secure, signV2, region)
if err != nil {
return model.NewLocAppError("RemoveFile", "utils.file.remove_file.s3.app_error", nil, err.Error())
}
bucket := Cfg.FileSettings.AmazonS3Bucket
if err := s3Clnt.RemoveObject(bucket, path); err != nil {
return model.NewLocAppError("RemoveFile", "utils.file.remove_file.s3.app_error", nil, err.Error())
}
} else if *Cfg.FileSettings.DriverName == model.IMAGE_DRIVER_LOCAL {
if err := os.Remove(Cfg.FileSettings.Directory + path); err != nil {
return model.NewLocAppError("RemoveFile", "utils.file.remove_file.local.app_error", nil, err.Error())
}
} else {
return model.NewLocAppError("RemoveFile", "utils.file.remove_file.configured.app_error", nil, "")
}
return nil
}
func getPathsFromObjectInfos(in <-chan s3.ObjectInfo) <-chan string {
out := make(chan string, 1)
go func() {
defer close(out)
for {
info, done := <-in
if !done {
break
}
out <- info.Key
}
}()
return out
}
func RemoveDirectory(path string) *model.AppError {
if *Cfg.FileSettings.DriverName == model.IMAGE_DRIVER_S3 {
endpoint := Cfg.FileSettings.AmazonS3Endpoint
accessKey := Cfg.FileSettings.AmazonS3AccessKeyId
secretKey := Cfg.FileSettings.AmazonS3SecretAccessKey
secure := *Cfg.FileSettings.AmazonS3SSL
signV2 := *Cfg.FileSettings.AmazonS3SignV2
region := Cfg.FileSettings.AmazonS3Region
s3Clnt, err := s3New(endpoint, accessKey, secretKey, secure, signV2, region)
if err != nil {
return model.NewLocAppError("RemoveDirectory", "utils.file.remove_directory.s3.app_error", nil, err.Error())
}
doneCh := make(chan struct{})
bucket := Cfg.FileSettings.AmazonS3Bucket
for err := range s3Clnt.RemoveObjects(bucket, getPathsFromObjectInfos(s3Clnt.ListObjects(bucket, path, true, doneCh))) {
if err.Err != nil {
doneCh <- struct{}{}
return model.NewLocAppError("RemoveDirectory", "utils.file.remove_directory.s3.app_error", nil, err.Err.Error())
}
}
close(doneCh)
} else if *Cfg.FileSettings.DriverName == model.IMAGE_DRIVER_LOCAL {
if err := os.RemoveAll(Cfg.FileSettings.Directory + path); err != nil {
return model.NewLocAppError("RemoveDirectory", "utils.file.remove_directory.local.app_error", nil, err.Error())
}
} else {
return model.NewLocAppError("RemoveDirectory", "utils.file.remove_directory.configured.app_error", nil, "")
}
return nil
}
func S3Metadata(encrypt bool, contentType string) map[string][]string {
metaData := make(map[string][]string)
if contentType != "" {
metaData["Content-Type"] = []string{"contentType"}
}
if encrypt {
metaData["x-amz-server-side-encryption"] = []string{"AES256"}
}
return metaData
}
func CopyMetadata(encrypt bool) map[string]string {
metaData := make(map[string]string)
metaData["x-amz-server-side-encryption"] = "AES256"
return metaData
}
|
