golang 对象存储客户端接口实现

对象存储标准的接口有：

• put
• get
• delete
• list

对象存储适合的文件类型：短视频，音频文件、照片、图标、pdf、word文档、电子票据。

对于超大文件的存储，有时候索引其中某一个扇区例如："file1.txt"文件的4096偏移量处的4个字节，总不能把整个文件get下来再访问吧。 需要一个扩展的接口：

package main

import "fmt"

type myoss interface {
  read(key string, offset, size int64) ([]byte, error)
  put(src, key string) (int64, error)
  get(key, dst string) (int64, error)
  list(bucket, user, passwd string) []string
  del(key string) ([]byte, error)
}

type myossc struct {
  host           []string
  bucket         string
  part           int64
  up_concurrency int64
  access_key     string
  secret_key     string
}

func (c *myossc) read(key string, offset, size int64) ([]byte, error) {
  fmt.Println("i am hlm oss read interface")
  return nil, nil
}

func (c *myossc) put(src, key string) (int64, error) {
  return 0, nil
}

func (c *myossc) get(key, dst string) (int64, error) {
  return 0, nil
}

func (c *myossc) list(bucket, user, passwd string) []string {
  return []string{}
}

func (c *myossc) del(key string) ([]byte, error) {
  return nil, nil
}

func main() {
  fmt.Println("ext-client-minio")
  client := &myossc{
    host:           []string{"http://182.168.31.100/data{1..100}", "http://182.168.31.103/data{1..100}"},
    bucket:         "test",
    part:           32,
    up_concurrency: 8,
    access_key:     "minio123",
    secret_key:     "minio123",
  }

  client.read("/data/dir1/dir2/dir4", 10240, 2048)
}