83 lines
1.4 KiB
Go
83 lines
1.4 KiB
Go
package registry
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import (
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"fmt"
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"os"
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)
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type ObjExporter struct {
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selector *ObjSelector
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}
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type PreGenerateInfo struct {
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Buckets []string `json:"buckets"`
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Objects []ObjInfo `json:"objects"`
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ObjSize string `json:"obj_size"`
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}
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type ObjInfo struct {
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Bucket string `json:"bucket"`
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Object string `json:"object"`
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}
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func NewObjExporter(selector *ObjSelector) *ObjExporter {
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return &ObjExporter{selector: selector}
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}
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func (o *ObjExporter) ExportJSONPreGen(fileName string) error {
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f, err := os.Create(fileName)
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if err != nil {
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return err
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}
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defer f.Close()
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// there can be a lot of object, so manually form json
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if _, err = f.WriteString(`{"objects":[`); err != nil {
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return err
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}
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bucketMap := make(map[string]struct{})
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count, err := o.selector.Count()
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if err != nil {
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return err
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}
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var comma string
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for i := 0; i < count; i++ {
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info := o.selector.NextObject()
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if info == nil {
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break
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}
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if _, err = f.WriteString(fmt.Sprintf(`%s{"bucket":"%s","object":"%s"}`, comma, info.S3Bucket, info.S3Key)); err != nil {
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return err
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}
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if i == 0 {
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comma = ","
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}
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bucketMap[info.S3Bucket] = struct{}{}
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}
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if _, err = f.WriteString(`],"buckets":[`); err != nil {
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return err
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}
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i := 0
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comma = ""
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for bucket := range bucketMap {
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if _, err = f.WriteString(fmt.Sprintf(`%s"%s"`, comma, bucket)); err != nil {
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return err
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}
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if i == 0 {
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comma = ","
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}
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i++
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}
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_, err = f.WriteString(`]}`)
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return err
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}
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