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client.go
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client.go
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// Copyright 2019 - now The https://github.com/nvwa-io/nvwa-io Authors
// 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 oss_client
import (
"errors"
"github.com/aliyun/aliyun-oss-go-sdk/oss"
"github.com/nvwa-io/nvwa-io/nvwa-agent/libs/logger"
"io/ioutil"
"strings"
)
func C() *Client {
return new(Client)
}
type OssClientConfig struct {
Endpoint string
AccessKey string
AccessSecret string
Bucket string
}
type Client struct {
c *OssClientConfig
}
func (t *Client) Config(c *OssClientConfig) *Client {
t.c = c
return t
}
// get oss bucket
func (t *Client) bucket() (*oss.Bucket, error) {
client, err := oss.New(t.c.Endpoint, t.c.AccessKey, t.c.AccessSecret)
if err != nil {
logger.Errorf("New oss instance failed: %s", err.Error())
return nil, err
}
bucket, err := client.Bucket(t.c.Bucket)
if err != nil {
logger.Errorf("Put Object From File failed: %s", err.Error())
}
return bucket, err
}
// get file md5 from oss object ETag
func (t *Client) GetObjectMd5(key string) (string, error) {
bucket, err := t.bucket()
if err != nil {
return "", err
}
header, err := bucket.GetObjectMeta(key)
if err != nil {
logger.Errorf("Failed to GetObjectMeta: %s", err.Error())
return "", err
}
if _, ok := header["ETag"]; !ok {
info := "Header lack of field ETag"
logger.Errorf(info)
return "", errors.New(info)
}
return strings.ToLower(header.Get("ETag")), nil
}
// upload local file to oss
// http://t.Endpoint/key
func (t *Client) Put(filePath, key string) error {
bucket, err := t.bucket()
if err != nil {
return err
}
err = bucket.PutObjectFromFile(key, filePath)
if err != nil {
logger.Errorf("Put Object From File failed: %s", err.Error())
}
return err
}
// get file content
func (t *Client) Get(key string) ([]byte, error) {
bucket, err := t.bucket()
if err != nil {
return nil, err
}
reader, err := bucket.GetObject(key)
if err != nil {
return nil, err
}
defer reader.Close()
return ioutil.ReadAll(reader)
}
// delete oss file
func (t *Client) Delete(key string) error {
bucket, err := t.bucket()
if err != nil {
return err
}
err = bucket.DeleteObject(key)
if err != nil {
logger.Errorf("Delete Object fail: %s", err.Error())
return err
}
return err
}