Add download version object on download api (#423)

restapi/operations/user_api/download_object_parameters.go

@@ -58,6 +58,11 @@ type DownloadObjectParams struct {
 	  In: query
 	*/
 	Prefix string
+	/*
+	  Required: true
+	  In: query
+	*/
+	VersionID string
 }
 
 // BindRequest both binds and validates a request, it assumes that complex things implement a Validatable(strfmt.Registry) error interface
@@ -81,6 +86,11 @@ func (o *DownloadObjectParams) BindRequest(r *http.Request, route *middleware.Ma
 		res = append(res, err)
 	}
 
+	qVersionID, qhkVersionID, _ := qs.GetOK("version_id")
+	if err := o.bindVersionID(qVersionID, qhkVersionID, route.Formats); err != nil {
+		res = append(res, err)
+	}
+
 	if len(res) > 0 {
 		return errors.CompositeValidationError(res...)
 	}
@@ -122,3 +132,24 @@ func (o *DownloadObjectParams) bindPrefix(rawData []string, hasKey bool, formats
 
 	return nil
 }
+
+// bindVersionID binds and validates parameter VersionID from query.
+func (o *DownloadObjectParams) bindVersionID(rawData []string, hasKey bool, formats strfmt.Registry) error {
+	if !hasKey {
+		return errors.Required("version_id", "query", rawData)
+	}
+	var raw string
+	if len(rawData) > 0 {
+		raw = rawData[len(rawData)-1]
+	}
+
+	// Required: true
+	// AllowEmptyValue: false
+	if err := validate.RequiredString("version_id", "query", raw); err != nil {
+		return err
+	}
+
+	o.VersionID = raw
+
+	return nil
+}

restapi/operations/user_api/download_object_urlbuilder.go

@@ -33,7 +33,8 @@ import (
 type DownloadObjectURL struct {
 	BucketName string
 
-	Prefix string
+	Prefix    string
+	VersionID string
 
 	_basePath string
 	// avoid unkeyed usage
@@ -81,6 +82,11 @@ func (o *DownloadObjectURL) Build() (*url.URL, error) {
 		qs.Set("prefix", prefixQ)
 	}
 
+	versionIDQ := o.VersionID
+	if versionIDQ != "" {
+		qs.Set("version_id", versionIDQ)
+	}
+
 	_result.RawQuery = qs.Encode()
 
 	return &_result, nil