@ -28,6 +28,9 @@ import (
"net"
"net/http"
"net/url"
"os"
"path/filepath"
"syscall"
"time"
"github.com/minio/minio/pkg/event"
@ -39,6 +42,8 @@ type WebhookArgs struct {
Enable bool ` json:"enable" `
Endpoint xnet . URL ` json:"endpoint" `
RootCAs * x509 . CertPool ` json:"-" `
QueueDir string ` json:"queueDir" `
QueueLimit uint16 ` json:"queueLimit" `
}
// Validate WebhookArgs fields
@ -49,6 +54,14 @@ func (w WebhookArgs) Validate() error {
if w . Endpoint . IsEmpty ( ) {
return errors . New ( "endpoint empty" )
}
if w . QueueDir != "" {
if ! filepath . IsAbs ( w . QueueDir ) {
return errors . New ( "queueDir path should be absolute" )
}
}
if w . QueueLimit > maxLimit {
return errors . New ( "queueLimit should not exceed 10000" )
}
return nil
}
@ -57,6 +70,7 @@ type WebhookTarget struct {
id event . TargetID
args WebhookArgs
httpClient * http . Client
store Store
}
// ID - returns target ID.
@ -64,11 +78,27 @@ func (target WebhookTarget) ID() event.TargetID {
return target . id
}
// Save - Sends event directly without persisting .
// Save - saves the events to the store if queuestore is configured, which will be replayed when the wenhook connection is active .
func ( target * WebhookTarget ) Save ( eventData event . Event ) error {
if target . store != nil {
return target . store . Put ( eventData )
}
urlStr , pErr := xnet . ParseURL ( target . args . Endpoint . String ( ) )
if pErr != nil {
return pErr
}
_ , dErr := net . Dial ( "tcp" , urlStr . Host )
if dErr != nil {
// To treat "connection refused" errors as errNotConnected.
if IsConnRefusedErr ( dErr ) {
return errNotConnected
}
return dErr
}
return target . send ( eventData )
}
// send - sends an event to the webhook.
func ( target * WebhookTarget ) send ( eventData event . Event ) error {
objectName , err := url . QueryUnescape ( eventData . S3 . Object . Key )
if err != nil {
@ -104,9 +134,52 @@ func (target *WebhookTarget) send(eventData event.Event) error {
return nil
}
// Send - interface compatible method does no-op.
// IsConnRefusedErr - To check for "connection refused" errors.
func IsConnRefusedErr ( err error ) bool {
if opErr , ok := err . ( * net . OpError ) ; ok {
if sysErr , ok := opErr . Err . ( * os . SyscallError ) ; ok {
if errno , ok := sysErr . Err . ( syscall . Errno ) ; ok {
if errno == syscall . ECONNREFUSED {
return true
}
}
}
}
return false
}
// Send - reads an event from store and sends it to webhook.
func ( target * WebhookTarget ) Send ( eventKey string ) error {
urlStr , pErr := xnet . ParseURL ( target . args . Endpoint . String ( ) )
if pErr != nil {
return pErr
}
_ , dErr := net . Dial ( "tcp" , urlStr . Host )
if dErr != nil {
// To treat "connection refused" errors as errNotConnected.
if IsConnRefusedErr ( dErr ) {
return errNotConnected
}
return dErr
}
eventData , eErr := target . store . Get ( eventKey )
if eErr != nil {
// The last event key in a successful batch will be sent in the channel atmost once by the replayEvents()
// Such events will not exist and would've been already been sent successfully.
if os . IsNotExist ( eErr ) {
return nil
}
return eErr
}
if err := target . send ( eventData ) ; err != nil {
return err
}
// Delete the event from store.
return target . store . Del ( eventKey )
}
// Close - does nothing and available for interface compatibility.
@ -115,8 +188,19 @@ func (target *WebhookTarget) Close() error {
}
// NewWebhookTarget - creates new Webhook target.
func NewWebhookTarget ( id string , args WebhookArgs ) * WebhookTarget {
return & WebhookTarget {
func NewWebhookTarget ( id string , args WebhookArgs , doneCh <- chan struct { } ) * WebhookTarget {
var store Store
if args . QueueDir != "" {
queueDir := filepath . Join ( args . QueueDir , storePrefix + "-webhook-" + id )
store = NewQueueStore ( queueDir , args . QueueLimit )
if oErr := store . Open ( ) ; oErr != nil {
return nil
}
}
target := & WebhookTarget {
id : event . TargetID { ID : id , Name : "webhook" } ,
args : args ,
httpClient : & http . Client {
@ -131,5 +215,15 @@ func NewWebhookTarget(id string, args WebhookArgs) *WebhookTarget {
ExpectContinueTimeout : 2 * time . Second ,
} ,
} ,
store : store ,
}
if target . store != nil {
// Replays the events from the store.
eventKeyCh := replayEvents ( target . store , doneCh )
// Start replaying events from the store.
go sendEvents ( target , eventKeyCh , doneCh )
}
return target
}
Praveen raj Mani
6 years ago
committed by