Go操作腾讯云COS对象存储的简单使用案例

准备环境

安装Go环境

Golang：用于下载和安装 Go 编译运行环境，请前往 Golang 官网进行下载

安装SDK

go get -u github.com/tencentyun/cos-go-sdk-v5

准备腾讯云COS对象存储服务

新用户一元钱即可购买腾讯云六个月50G容量的对象存储,别说一元钱都没有

请求示例

使用COS域名生成 COS GO 客户端 Client 结构

使用永久密钥

package main

import (
    "fmt"
    "github.com/tencentyun/cos-go-sdk-v5"
    "net/http"
    "net/url"
)

// 请求示例,使用永久密钥
func main()  {
    u, _ := url.Parse("cos_url")
    b := &cos.BaseURL{BucketURL: u}
    client := cos.NewClient(b, &http.Client{
        Transport: &cos.AuthorizationTransport{
            SecretID:  secretid,
            SecretKey: secretkey,
        },
    })
    fmt.Println(client)
}

// 输出
&{0xc00007eea0  cos-go-sdk-v5/0.7.7 0xc00000e380 {0xc00010e2a0} 0xc00010e2d0 0xc00010e2d0 0xc00010e2d0 0xc00010e2d0}

创建存储桶

package main

import (
    "context"
    "github.com/tencentyun/cos-go-sdk-v5"
    "net/http"
    "net/url"
)

var secretid string = "AKIDe75eCTxIpqhjT9Iyyi5CPMIyNYR0E8gC"
var secretkey string = "mIYYHkJbomVyCB0sSmqeCKHyjW6HCrG2"
var cos_url string ="https://soft-1259174039.cos.ap-beijing.myqcloud.com"

func main()  {
    u, _ := url.Parse("cos_url")
    b := &cos.BaseURL{BucketURL: u}
    c := cos.NewClient(b, &http.Client{
        Transport: &cos.AuthorizationTransport{
            SecretID:  secretid,
            SecretKey: secretkey,
        },
    })
    _,err := c.Bucket.Put(context.Background(),nil)
    if err != nil{
        panic(err)
    }
}

查询存储桶列表

package main

import (
    "context"
    "fmt"
    "github.com/tencentyun/cos-go-sdk-v5"
    "net/http"
    "net/url"
)

var secretid string = "AKIDe75eCTxIpqhjT9Iyyi5CPMIyNYR0E8gC"
var secretkey string = "mIYYHkJbomVyCB0sSmqeCKHyjW6HCrG2"
var cos_url string ="https://soft-1259174039.cos.ap-beijing.myqcloud.com"

func main()  {
    u, _ := url.Parse("cos_url")
    b := &cos.BaseURL{BucketURL: u}
    c := cos.NewClient(b, &http.Client{
        Transport: &cos.AuthorizationTransport{
            SecretID:  secretid,
            SecretKey: secretkey,
        },
    })
    s,_,err := c.Service.Get(context.Background())
    if err != nil{
        panic(err)
    }

    for _,b := range s.Buckets {
        fmt.Println("%#v\n",b)
    }
}

// %#v
// {soft-1259174039 ap-beijing 2020-07-23T09:25:40Z}

上传对象

package main

import (
    "context"
    "github.com/tencentyun/cos-go-sdk-v5"
    "net/http"
    "net/url"
    "strings"
)

func main()  {
    u, _ := url.Parse("cos_url")
    b := &cos.BaseURL{BucketURL: u}
    c := cos.NewClient(b, &http.Client{
        Transport: &cos.AuthorizationTransport{
            SecretID:  "secretid",
            SecretKey: "secretkey",
        },
    })

    name := "test/objectPut.go"
    // 1. 通过字符串上传对象
    f := strings.NewReader("test")
    //
    _,err := c.Object.Put(context.Background(),name,f,nil)
    if err != nil{
        panic(err)
    }

    // 上传本地文件
    _, err = c.Object.PutFromFile(context.Background(),name,"/Users/youmen/a/test.txt",nil)
    if err != nil {
        panic(err)
    }
}

查询对象列表

package main

import (
    "context"
    "fmt"
    "github.com/tencentyun/cos-go-sdk-v5"
    "net/http"
    "net/url"
)

func main()  {
    u, _ := url.Parse("cos_url")
    b := &cos.BaseURL{BucketURL: u}
    c := cos.NewClient(b, &http.Client{
        Transport: &cos.AuthorizationTransport{
            SecretID:  "secretid",
            SecretKey: "secretkey",
        },
    })

    opt := &cos.BucketGetOptions{
        Prefix: "test",
        MaxKeys: 3,
    }

    v,_, err := c.Bucket.Get(context.Background(),opt)
    if err != nil{
        panic(err)
    }

    for _,c := range v.Contents {
        fmt.Println("%s,%d\n",c.Key,c.Size)
    }
}

//%s,%d
// test/objectPut.go 43

下载对象

package main

import (
    "context"
    "fmt"
    "github.com/tencentyun/cos-go-sdk-v5"
    "io/ioutil"
    "net/http"
    "net/url"
)

func main()  {
    u, _ := url.Parse("cos_url")
    b := &cos.BaseURL{BucketURL: u}
    c := cos.NewClient(b, &http.Client{
        Transport: &cos.AuthorizationTransport{
            SecretID:  "secretid",
            SecretKey: "secretkey",
        },
    })

    // 1.通过响应体获取对象
    name := "test/objectPut.go"
    resp,err := c.Object.Get(context.Background(),name,nil)
    if err != nil{
        panic(err)
    }

    bs,_ := ioutil.ReadAll(resp.Body)
    resp.Body.Close()
    fmt.Println("%s\n",string(bs))

    // 2.获取对象到本地文件
    _,err = c.Object.GetToFile(context.Background(),name,"exampleobject",nil)
    if err != nil{
        panic(err)
    }
}

//%s
// HelloWorld,纵有疾风起,人生不言弃!

// 我们去查看之前上传的文件内容
// cat /Users/youmen/a/test.txt
// HelloWorld,纵有疾风起,人生不言弃!%

删除对象

package main

import (
    "context"
    "github.com/tencentyun/cos-go-sdk-v5"
    "net/http"
    "net/url"
)

func main()  {
    u, _ := url.Parse("cos_url")
    b := &cos.BaseURL{BucketURL: u}
    c := cos.NewClient(b, &http.Client{
        Transport: &cos.AuthorizationTransport{
            SecretID:  "secretid",
            SecretKey: "secretkey",
        },
    })

    // 删除对象
    name := "test/objectPut.go"
    _,err := c.Object.Delete(context.Background(),name)
    if err != nil{
        panic(err)
    }
}