func (s *BucketService) Get(ctx context.Context, opt *BucketGetOptions) (*BucketGetResult, *Response, error)

package main

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

func main(){
    // Bucket name in the format of `BucketName-APPID` (`APPID` is required), which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket.
    // Replace it with your region, which can be viewed in the COS console at https://console.tencentcloud.com/. For more information about regions, visit https://www.tencentcloud.com/document/product/436/6224.
    u, _ := url.Parse("https://examplebucket-1250000000.cos.ap-guangzhou.myqcloud.com")
    b := &cos.BaseURL{BucketURL: u}
    client := cos.NewClient(b, &http.Client{
        Transport: &cos.AuthorizationTransport{
            // Get the key from environment variables
            // Environment variable `SECRETID` refers to the user's `SecretId`, which can be viewed in the CAM console at https://console.tencentcloud.com/cam/capi.
            SecretID: os.Getenv("SECRETID"),  // User `SecretId`. We recommend you use a sub-account key and follow the principle of least privilege to reduce risks. For information about how to obtain a sub-account key, visit https://www.tencentcloud.com/document/product/598/37140?from_cn_redirect=1.
            // Environment variable `SECRETKEY` refers to the user's `SecretKey`, which can be viewed in the CAM console at https://console.tencentcloud.com/cam/capi.
            SecretKey: os.Getenv("SECRETKEY"),  // User `SecretKey`. We recommend you use a sub-account key and follow the principle of least privilege to reduce risks. For information about how to obtain a sub-account key, visit  https://www.tencentcloud.com/document/product/598/37140?from_cn_redirect=1.
        },
    })
    opt := &cos.BucketGetOptions{
        Prefix:  "test",
        MaxKeys: 100,
    }
    _, _, err := client.Bucket.Get(context.Background(), opt)
    if err != nil{
        panic(err)
    }
}

package main

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

func main(){
    // Bucket name in the format of `BucketName-APPID` (`APPID` is required), which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket.
    // Replace it with your region, which can be viewed in the COS console at https://console.tencentcloud.com/. For more information about regions, visit https://www.tencentcloud.com/document/product/436/6224.
    u, _ := url.Parse("https://examplebucket-1250000000.cos.ap-guangzhou.myqcloud.com")
    b := &cos.BaseURL{BucketURL: u}
    client := cos.NewClient(b, &http.Client{
        Transport: &cos.AuthorizationTransport{
            // Get the key from environment variables
            // Environment variable `SECRETID` refers to the user's `SecretId`, which can be viewed in the CAM console at https://console.tencentcloud.com/cam/capi.
            SecretID: os.Getenv("SECRETID"),  // User `SecretId`. We recommend you use a sub-account key and follow the principle of least privilege to reduce risks. For information about how to obtain a sub-account key, visit https://www.tencentcloud.com/document/product/598/37140?from_cn_redirect=1.
            // Environment variable `SECRETKEY` refers to the user's `SecretKey`, which can be viewed in the CAM console at https://console.tencentcloud.com/cam/capi.
            SecretKey: os.Getenv("SECRETKEY"),  // User `SecretKey`. We recommend you use a sub-account key and follow the principle of least privilege to reduce risks. For information about how to obtain a sub-account key, visit  https://www.tencentcloud.com/document/product/598/37140?from_cn_redirect=1.
        },
    })
    var marker string
    opt := &cos.BucketGetOptions{
        Prefix:    "folder/", // `prefix` indicates the directory to query.
        Delimiter: "/",       // Set the `delimiter` to "/" to list objects in the current directory. To list all objects, leave this parameter empty.
        MaxKeys:   1000,      // Set the maximum number of traversed objects (up to 1,000 per `listobject` request).
    }
    isTruncated := true
    for isTruncated {
        opt.Marker = marker
        v, _, err := client.Bucket.Get(context.Background(), opt)
        if err != nil{
            fmt.Println(err)
            break
        }
        for _, content := range v.Contents {
            fmt.Printf("Object: %v\\n", content.Key)
        }
        // `common prefix` indicates the paths that end with the `delimiter`. If the `delimiter` is set to "/", the `common prefix` indicates the paths of all subdirectories.
        for _, commonPrefix := range v.CommonPrefixes {
            fmt.Printf("CommonPrefixes: %v\\n", commonPrefix)
        }
        isTruncated = v.IsTruncated    // Whether any data still exists
        marker = v.NextMarker          // Set the start `key` for the next request
    }
}

type BucketGetOptions struct {
    Prefix       string 
    Delimiter    string 
    EncodingType    string 
    Marker       string 
    MaxKeys      int    
}

type BucketGetResult struct {
    Name           string
    Prefix         string 
    Marker         string 
    NextMarker     string 
    Delimiter      string 
    MaxKeys        int
    IsTruncated    bool
    Contents       []Object 
    CommonPrefixes      []string 
    EncodingType   string   
}

func (s *BucketService) GetObjectVersions(ctx context.Context, opt *BucketGetObjectVersionsOptions) (*BucketGetObjectVersionsResult, *Response, error)

package main

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

func main(){
    // Bucket name in the format of `BucketName-APPID` (`APPID` is required), which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket.
    // Replace it with your region, which can be viewed in the COS console at https://console.tencentcloud.com/. For more information about regions, visit https://www.tencentcloud.com/document/product/436/6224.
    u, _ := url.Parse("https://examplebucket-1250000000.cos.ap-guangzhou.myqcloud.com")
    b := &cos.BaseURL{BucketURL: u}
    client := cos.NewClient(b, &http.Client{
        Transport: &cos.AuthorizationTransport{
            // Get the key from environment variables
            // Environment variable `SECRETID` refers to the user's `SecretId`, which can be viewed in the CAM console at https://console.tencentcloud.com/cam/capi.
            SecretID: os.Getenv("SECRETID"),  // User `SecretId`. We recommend you use a sub-account key and follow the principle of least privilege to reduce risks. For information about how to obtain a sub-account key, visit https://www.tencentcloud.com/document/product/598/37140?from_cn_redirect=1.
            // Environment variable `SECRETKEY` refers to the user's `SecretKey`, which can be viewed in the CAM console at https://console.tencentcloud.com/cam/capi.
            SecretKey: os.Getenv("SECRETKEY"),  // User `SecretKey`. We recommend you use a sub-account key and follow the principle of least privilege to reduce risks. For information about how to obtain a sub-account key, visit  https://www.tencentcloud.com/document/product/598/37140?from_cn_redirect=1.
        },
    })
    keyMarker := ""
    versionIdMarker := ""
    isTruncated := true
    opt := &cos.BucketGetObjectVersionsOptions{}
    for isTruncated {
        opt.KeyMarker = keyMarker
        opt.VersionIdMarker = versionIdMarker
        v, _, err := client.Bucket.GetObjectVersions(context.Background(), opt)
        if err != nil{
            // ERROR
            break
        }
        for _, vc := range v.Version {
            fmt.Printf("Version: %v, %v, %v, %v\\n", vc.Key, vc.Size, vc.VersionId, vc.IsLatest)
        }
        for _, dc := range v.DeleteMarker {
            fmt.Printf("DeleteMarker: %v, %v, %v\\n", dc.Key, dc.VersionId, dc.IsLatest)
        }
        keyMarker = v.NextKeyMarker
        versionIdMarker = v.NextVersionIdMarker
        isTruncated = v.IsTruncated
    }
}

type BucketGetObjectVersionsOptions struct {
    Prefix          string
    Delimiter       string
    EncodingType    string
    KeyMarker       string
    VersionIdMarker string
    MaxKeys         int
}

type BucketGetObjectVersionsResult struct {
    Name                string
    EncodingType        string
    Prefix              string
    KeyMarker           string
    VersionIdMarker     string
    MaxKeys             int
    Delimiter           string
    IsTruncated         bool
    NextKeyMarker       string
    NextVersionIdMarker string
    CommonPrefixes      []string
    Version             []ListVersionsResultVersion
    DeleteMarker        []ListVersionsResultDeleteMarker
}
type ListVersionsResultVersion struct {
    Key          string
    VersionId    string
    IsLatest     bool
    LastModified string
    ETag         string
    Size         int
    StorageClass   string
    Owner        *Owner
}
type ListVersionsResultDeleteMarker struct {
    Key          string
    VersionId    string
    IsLatest     bool
    LastModified string
    Owner        *Owner
}