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|
package sample
import (
"fmt"
"github.com/aliyun/aliyun-oss-go-sdk/oss"
)
// ListObjectsSample 展示了列举文件的用法，包括默认参数列举、指定参数列举
func ListObjectsSample() {
var myObjects = []Object{
{"my-object-1", ""},
{"my-object-11", ""},
{"my-object-2", ""},
{"my-object-21", ""},
{"my-object-22", ""},
{"my-object-3", ""},
{"my-object-31", ""},
{"my-object-32", ""}}
// 创建Bucket
bucket, err := GetTestBucket(bucketName)
if err != nil {
HandleError(err)
}
// 创建object
err = CreateObjects(bucket, myObjects)
if err != nil {
HandleError(err)
}
// 场景1：使用默认参数参数
lor, err := bucket.ListObjects()
if err != nil {
HandleError(err)
}
fmt.Println("my objects:", getObjectsFormResponse(lor))
// 场景2：指定最大返回数量
lor, err = bucket.ListObjects(oss.MaxKeys(3))
if err != nil {
HandleError(err)
}
fmt.Println("my objects max num:", getObjectsFormResponse(lor))
// 场景3：返回指定前缀的Bucket
lor, err = bucket.ListObjects(oss.Prefix("my-object-2"))
if err != nil {
HandleError(err)
}
fmt.Println("my objects prefix :", getObjectsFormResponse(lor))
// 场景4：指定从某个之后返回
lor, err = bucket.ListObjects(oss.Marker("my-object-22"))
if err != nil {
HandleError(err)
}
fmt.Println("my objects marker :", getObjectsFormResponse(lor))
// 场景5：分页获取所有object，每次返回3个
marker := oss.Marker("")
for {
lor, err = bucket.ListObjects(oss.MaxKeys(3), marker)
if err != nil {
HandleError(err)
}
marker = oss.Marker(lor.NextMarker)
fmt.Println("my objects page :", getObjectsFormResponse(lor))
if !lor.IsTruncated {
break
}
}
// 场景6：分页所有获取从某个之后的object，每次返回3个
marker = oss.Marker("my-object-22")
for {
lor, err = bucket.ListObjects(oss.MaxKeys(3), marker)
if err != nil {
HandleError(err)
}
marker = oss.Marker(lor.NextMarker)
fmt.Println("my objects marker&page :", getObjectsFormResponse(lor))
if !lor.IsTruncated {
break
}
}
// 场景7：分页所有获取前缀的object，每次返回2个
pre := oss.Prefix("my-object-2")
marker = oss.Marker("")
for {
lor, err = bucket.ListObjects(oss.MaxKeys(2), marker, pre)
if err != nil {
HandleError(err)
}
pre = oss.Prefix(lor.Prefix)
marker = oss.Marker(lor.NextMarker)
fmt.Println("my objects prefix&page :", getObjectsFormResponse(lor))
if !lor.IsTruncated {
break
}
}
err = DeleteObjects(bucket, myObjects)
if err != nil {
HandleError(err)
}
// 场景8：prefix和delimiter结合，完成分组功能，ListObjectsResponse.Objects表示不再组中，
// ListObjectsResponse.CommonPrefixes分组结果
myObjects = []Object{
{"fun/test.txt", ""},
{"fun/test.jpg", ""},
{"fun/movie/001.avi", ""},
{"fun/movie/007.avi", ""},
{"fun/music/001.mp3", ""},
{"fun/music/001.mp3", ""}}
// 创建object
err = CreateObjects(bucket, myObjects)
if err != nil {
HandleError(err)
}
lor, err = bucket.ListObjects(oss.Prefix("fun/"), oss.Delimiter("/"))
if err != nil {
HandleError(err)
}
fmt.Println("my objects prefix :", getObjectsFormResponse(lor),
"common prefixes:", lor.CommonPrefixes)
// 删除object和bucket
err = DeleteTestBucketAndObject(bucketName)
if err != nil {
HandleError(err)
}
fmt.Println("ListObjectsSample completed")
}
func getObjectsFormResponse(lor oss.ListObjectsResult) string {
var output string
for _, object := range lor.Objects {
output += object.Key + " "
}
return output
}
|
