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user_buckets_events.go
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user_buckets_events.go
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// This file is part of MinIO Console Server
// Copyright (c) 2021 MinIO, Inc.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package restapi
import (
"context"
"strings"
"github.com/go-openapi/runtime/middleware"
"github.com/go-openapi/swag"
"github.com/trinet2005/oss-console/models"
"github.com/trinet2005/oss-console/restapi/operations"
bucketApi "github.com/trinet2005/oss-console/restapi/operations/bucket"
"github.com/trinet2005/oss-go-sdk/pkg/notification"
)
func registerBucketEventsHandlers(api *operations.ConsoleAPI) {
// list bucket events
api.BucketListBucketEventsHandler = bucketApi.ListBucketEventsHandlerFunc(func(params bucketApi.ListBucketEventsParams, session *models.Principal) middleware.Responder {
listBucketEventsResponse, err := getListBucketEventsResponse(session, params)
if err != nil {
return bucketApi.NewListBucketEventsDefault(err.Code).WithPayload(err.APIError)
}
return bucketApi.NewListBucketEventsOK().WithPayload(listBucketEventsResponse)
})
// create bucket event
api.BucketCreateBucketEventHandler = bucketApi.CreateBucketEventHandlerFunc(func(params bucketApi.CreateBucketEventParams, session *models.Principal) middleware.Responder {
if err := getCreateBucketEventsResponse(session, params); err != nil {
return bucketApi.NewCreateBucketEventDefault(err.Code).WithPayload(err.APIError)
}
return bucketApi.NewCreateBucketEventCreated()
})
// delete bucket event
api.BucketDeleteBucketEventHandler = bucketApi.DeleteBucketEventHandlerFunc(func(params bucketApi.DeleteBucketEventParams, session *models.Principal) middleware.Responder {
if err := getDeleteBucketEventsResponse(session, params); err != nil {
return bucketApi.NewDeleteBucketEventDefault(err.Code).WithPayload(err.APIError)
}
return bucketApi.NewDeleteBucketEventNoContent()
})
}
// listBucketEvents fetches a list of all events set for a bucket and serializes them for a proper output
func listBucketEvents(client MinioClient, bucketName string) ([]*models.NotificationConfig, error) {
var configs []*models.NotificationConfig
bn, err := client.getBucketNotification(context.Background(), bucketName)
if err != nil {
return nil, err
}
// Generate pretty event names from event types
prettyEventNames := func(eventsTypes []notification.EventType) []models.NotificationEventType {
var result []models.NotificationEventType
for _, eventType := range eventsTypes {
var eventTypePretty models.NotificationEventType
switch eventType {
case notification.ObjectAccessedAll:
eventTypePretty = models.NotificationEventTypeGet
case notification.ObjectCreatedAll:
eventTypePretty = models.NotificationEventTypePut
case notification.ObjectRemovedAll:
eventTypePretty = models.NotificationEventTypeDelete
case notification.ObjectReplicationAll:
eventTypePretty = models.NotificationEventTypeReplica
case notification.ObjectTransitionAll:
eventTypePretty = models.NotificationEventTypeIlm
default:
continue
}
result = append(result, eventTypePretty)
}
return result
}
// part of implementation taken from minio/mc
// s3Client.ListNotificationConfigs()... to serialize configurations
getFilters := func(config notification.Config) (prefix, suffix string) {
if config.Filter == nil {
return
}
for _, filter := range config.Filter.S3Key.FilterRules {
if strings.ToLower(filter.Name) == "prefix" {
prefix = filter.Value
}
if strings.ToLower(filter.Name) == "suffix" {
suffix = filter.Value
}
}
return prefix, suffix
}
for _, embed := range bn.TopicConfigs {
prefix, suffix := getFilters(embed.Config)
configs = append(configs, &models.NotificationConfig{
ID: embed.ID,
Arn: swag.String(embed.Topic),
Events: prettyEventNames(embed.Events),
Prefix: prefix,
Suffix: suffix,
})
}
for _, embed := range bn.QueueConfigs {
prefix, suffix := getFilters(embed.Config)
configs = append(configs, &models.NotificationConfig{
ID: embed.ID,
Arn: swag.String(embed.Queue),
Events: prettyEventNames(embed.Events),
Prefix: prefix,
Suffix: suffix,
})
}
for _, embed := range bn.LambdaConfigs {
prefix, suffix := getFilters(embed.Config)
configs = append(configs, &models.NotificationConfig{
ID: embed.ID,
Arn: swag.String(embed.Lambda),
Events: prettyEventNames(embed.Events),
Prefix: prefix,
Suffix: suffix,
})
}
return configs, nil
}
// getListBucketsResponse performs listBucketEvents() and serializes it to the handler's output
func getListBucketEventsResponse(session *models.Principal, params bucketApi.ListBucketEventsParams) (*models.ListBucketEventsResponse, *CodedAPIError) {
ctx, cancel := context.WithCancel(params.HTTPRequest.Context())
defer cancel()
mClient, err := newMinioClient(session, getClientIP(params.HTTPRequest))
if err != nil {
return nil, ErrorWithContext(ctx, err)
}
// create a minioClient interface implementation
// defining the client to be used
minioClient := minioClient{client: mClient}
bucketEvents, err := listBucketEvents(minioClient, params.BucketName)
if err != nil {
return nil, ErrorWithContext(ctx, err)
}
// serialize output
listBucketsResponse := &models.ListBucketEventsResponse{
Events: bucketEvents,
Total: int64(len(bucketEvents)),
}
return listBucketsResponse, nil
}
// createBucketEvent calls mc AddNotificationConfig() to create a bucket nofication
//
// If notificationEvents is empty, by default will set [get, put, delete], else the provided
// ones will be set.
// this function follows same behavior as minio/mc for adding a bucket event
func createBucketEvent(ctx context.Context, client MCClient, arn string, notificationEvents []models.NotificationEventType, prefix, suffix string, ignoreExisting bool) error {
var events []string
if len(notificationEvents) == 0 {
// default event values are [get, put, delete]
events = []string{
string(models.NotificationEventTypeGet),
string(models.NotificationEventTypePut),
string(models.NotificationEventTypeDelete),
}
} else {
// else use defined events in request
// cast type models.NotificationEventType to string
for _, e := range notificationEvents {
events = append(events, string(e))
}
}
perr := client.addNotificationConfig(ctx, arn, events, prefix, suffix, ignoreExisting)
if perr != nil {
return perr.Cause
}
return nil
}
// getCreateBucketEventsResponse calls createBucketEvent to add a bucket event notification
func getCreateBucketEventsResponse(session *models.Principal, params bucketApi.CreateBucketEventParams) *CodedAPIError {
ctx, cancel := context.WithCancel(params.HTTPRequest.Context())
defer cancel()
bucketName := params.BucketName
eventReq := params.Body
s3Client, err := newS3BucketClient(session, bucketName, "", getClientIP(params.HTTPRequest))
if err != nil {
return ErrorWithContext(ctx, err)
}
// create a mc S3Client interface implementation
// defining the client to be used
mcClient := mcClient{client: s3Client}
err = createBucketEvent(ctx, mcClient, *eventReq.Configuration.Arn, eventReq.Configuration.Events, eventReq.Configuration.Prefix, eventReq.Configuration.Suffix, eventReq.IgnoreExisting)
if err != nil {
return ErrorWithContext(ctx, err)
}
return nil
}
// deleteBucketEventNotification calls S3Client.RemoveNotificationConfig to remove a bucket event notification
func deleteBucketEventNotification(ctx context.Context, client MCClient, arn string, events []models.NotificationEventType, prefix, suffix *string) error {
eventSingleString := joinNotificationEvents(events)
perr := client.removeNotificationConfig(ctx, arn, eventSingleString, *prefix, *suffix)
if perr != nil {
return perr.Cause
}
return nil
}
func joinNotificationEvents(events []models.NotificationEventType) string {
var eventsArn []string
for _, e := range events {
eventsArn = append(eventsArn, string(e))
}
return strings.Join(eventsArn, ",")
}
// getDeleteBucketEventsResponse calls deleteBucketEventNotification() to delete a bucket event notification
func getDeleteBucketEventsResponse(session *models.Principal, params bucketApi.DeleteBucketEventParams) *CodedAPIError {
ctx, cancel := context.WithCancel(params.HTTPRequest.Context())
defer cancel()
bucketName := params.BucketName
arn := params.Arn
events := params.Body.Events
prefix := params.Body.Prefix
suffix := params.Body.Suffix
s3Client, err := newS3BucketClient(session, bucketName, "", getClientIP(params.HTTPRequest))
if err != nil {
return ErrorWithContext(ctx, err)
}
// create a mc S3Client interface implementation
// defining the client to be used
mcClient := mcClient{client: s3Client}
err = deleteBucketEventNotification(ctx, mcClient, arn, events, prefix, suffix)
if err != nil {
return ErrorWithContext(ctx, err)
}
return nil
}