add experimental plugin system

This commit is contained in:
Nicola Murino
2021-07-11 15:26:51 +02:00
parent bfa4085932
commit bd5191dfc5
101 changed files with 3190 additions and 1612 deletions

View File

@@ -0,0 +1,72 @@
package notifier
import (
"context"
"time"
"google.golang.org/protobuf/types/known/emptypb"
"google.golang.org/protobuf/types/known/timestamppb"
"github.com/drakkan/sftpgo/v2/sdk/plugin/notifier/proto"
)
const (
rpcTimeout = 20 * time.Second
)
// GRPCClient is an implementation of Notifier interface that talks over RPC.
type GRPCClient struct {
client proto.NotifierClient
}
// NotifyFsEvent implements the Notifier interface
func (c *GRPCClient) NotifyFsEvent(action, username, fsPath, fsTargetPath, sshCmd, protocol string, fileSize int64, status int) error {
ctx, cancel := context.WithTimeout(context.Background(), rpcTimeout)
defer cancel()
_, err := c.client.SendFsEvent(ctx, &proto.FsEvent{
Timestamp: timestamppb.New(time.Now()),
Action: action,
Username: username,
FsPath: fsPath,
FsTargetPath: fsTargetPath,
SshCmd: sshCmd,
FileSize: fileSize,
Protocol: protocol,
Status: int32(status),
})
return err
}
// NotifyUserEvent implements the Notifier interface
func (c *GRPCClient) NotifyUserEvent(action string, user []byte) error {
ctx, cancel := context.WithTimeout(context.Background(), rpcTimeout)
defer cancel()
_, err := c.client.SendUserEvent(ctx, &proto.UserEvent{
Timestamp: timestamppb.New(time.Now()),
Action: action,
User: user,
})
return err
}
// GRPCServer defines the gRPC server that GRPCClient talks to.
type GRPCServer struct {
Impl Notifier
}
// SendFsEvent implements the serve side fs notify method
func (s *GRPCServer) SendFsEvent(ctx context.Context, req *proto.FsEvent) (*emptypb.Empty, error) {
err := s.Impl.NotifyFsEvent(req.Action, req.Username, req.FsPath, req.FsTargetPath, req.SshCmd,
req.Protocol, req.FileSize, int(req.Status))
return &emptypb.Empty{}, err
}
// SendUserEvent implements the serve side user notify method
func (s *GRPCServer) SendUserEvent(ctx context.Context, req *proto.UserEvent) (*emptypb.Empty, error) {
err := s.Impl.NotifyUserEvent(req.Action, req.User)
return &emptypb.Empty{}, err
}

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@@ -0,0 +1,57 @@
// Package notifier defines the implementation for event notifier plugin.
// Notifier plugins allow to receive filesystem events such as file uploads,
// downloads etc. and user events such as add, update, delete.
package notifier
import (
"context"
"github.com/hashicorp/go-plugin"
"google.golang.org/grpc"
"github.com/drakkan/sftpgo/v2/sdk/plugin/notifier/proto"
)
const (
// PluginName defines the name for a notifier plugin
PluginName = "notifier"
)
// Handshake is a common handshake that is shared by plugin and host.
var Handshake = plugin.HandshakeConfig{
ProtocolVersion: 1,
MagicCookieKey: "SFTPGO_NOTIFIER_PLUGIN",
MagicCookieValue: "c499b98b-cd59-4df2-92b3-6268817f4d80",
}
// PluginMap is the map of plugins we can dispense.
var PluginMap = map[string]plugin.Plugin{
PluginName: &Plugin{},
}
// Notifier defines the interface for notifiers plugins
type Notifier interface {
NotifyFsEvent(action, username, fsPath, fsTargetPath, sshCmd, protocol string, fileSize int64, status int) error
NotifyUserEvent(action string, user []byte) error
}
// Plugin defines the implementation to serve/connect to a notifier plugin
type Plugin struct {
plugin.Plugin
Impl Notifier
}
// GRPCServer defines the GRPC server implementation for this plugin
func (p *Plugin) GRPCServer(broker *plugin.GRPCBroker, s *grpc.Server) error {
proto.RegisterNotifierServer(s, &GRPCServer{
Impl: p.Impl,
})
return nil
}
// GRPCClient defines the GRPC client implementation for this plugin
func (p *Plugin) GRPCClient(ctx context.Context, broker *plugin.GRPCBroker, c *grpc.ClientConn) (interface{}, error) {
return &GRPCClient{
client: proto.NewNotifierClient(c),
}, nil
}

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@@ -0,0 +1,448 @@
// Code generated by protoc-gen-go. DO NOT EDIT.
// versions:
// protoc-gen-go v1.26.0
// protoc v3.17.3
// source: notifier/proto/notifier.proto
package proto
import (
context "context"
grpc "google.golang.org/grpc"
codes "google.golang.org/grpc/codes"
status "google.golang.org/grpc/status"
protoreflect "google.golang.org/protobuf/reflect/protoreflect"
protoimpl "google.golang.org/protobuf/runtime/protoimpl"
emptypb "google.golang.org/protobuf/types/known/emptypb"
timestamppb "google.golang.org/protobuf/types/known/timestamppb"
reflect "reflect"
sync "sync"
)
const (
// Verify that this generated code is sufficiently up-to-date.
_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
// Verify that runtime/protoimpl is sufficiently up-to-date.
_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
)
type FsEvent struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
Timestamp *timestamppb.Timestamp `protobuf:"bytes,1,opt,name=timestamp,proto3" json:"timestamp,omitempty"`
Action string `protobuf:"bytes,2,opt,name=action,proto3" json:"action,omitempty"`
Username string `protobuf:"bytes,3,opt,name=username,proto3" json:"username,omitempty"`
FsPath string `protobuf:"bytes,4,opt,name=fs_path,json=fsPath,proto3" json:"fs_path,omitempty"`
FsTargetPath string `protobuf:"bytes,5,opt,name=fs_target_path,json=fsTargetPath,proto3" json:"fs_target_path,omitempty"`
SshCmd string `protobuf:"bytes,6,opt,name=ssh_cmd,json=sshCmd,proto3" json:"ssh_cmd,omitempty"`
FileSize int64 `protobuf:"varint,7,opt,name=file_size,json=fileSize,proto3" json:"file_size,omitempty"`
Protocol string `protobuf:"bytes,8,opt,name=protocol,proto3" json:"protocol,omitempty"`
Status int32 `protobuf:"varint,9,opt,name=status,proto3" json:"status,omitempty"`
}
func (x *FsEvent) Reset() {
*x = FsEvent{}
if protoimpl.UnsafeEnabled {
mi := &file_notifier_proto_notifier_proto_msgTypes[0]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
}
func (x *FsEvent) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*FsEvent) ProtoMessage() {}
func (x *FsEvent) ProtoReflect() protoreflect.Message {
mi := &file_notifier_proto_notifier_proto_msgTypes[0]
if protoimpl.UnsafeEnabled && x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use FsEvent.ProtoReflect.Descriptor instead.
func (*FsEvent) Descriptor() ([]byte, []int) {
return file_notifier_proto_notifier_proto_rawDescGZIP(), []int{0}
}
func (x *FsEvent) GetTimestamp() *timestamppb.Timestamp {
if x != nil {
return x.Timestamp
}
return nil
}
func (x *FsEvent) GetAction() string {
if x != nil {
return x.Action
}
return ""
}
func (x *FsEvent) GetUsername() string {
if x != nil {
return x.Username
}
return ""
}
func (x *FsEvent) GetFsPath() string {
if x != nil {
return x.FsPath
}
return ""
}
func (x *FsEvent) GetFsTargetPath() string {
if x != nil {
return x.FsTargetPath
}
return ""
}
func (x *FsEvent) GetSshCmd() string {
if x != nil {
return x.SshCmd
}
return ""
}
func (x *FsEvent) GetFileSize() int64 {
if x != nil {
return x.FileSize
}
return 0
}
func (x *FsEvent) GetProtocol() string {
if x != nil {
return x.Protocol
}
return ""
}
func (x *FsEvent) GetStatus() int32 {
if x != nil {
return x.Status
}
return 0
}
type UserEvent struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
Timestamp *timestamppb.Timestamp `protobuf:"bytes,1,opt,name=timestamp,proto3" json:"timestamp,omitempty"`
Action string `protobuf:"bytes,2,opt,name=action,proto3" json:"action,omitempty"`
User []byte `protobuf:"bytes,3,opt,name=user,proto3" json:"user,omitempty"` // SFTPGo user json serialized
}
func (x *UserEvent) Reset() {
*x = UserEvent{}
if protoimpl.UnsafeEnabled {
mi := &file_notifier_proto_notifier_proto_msgTypes[1]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
}
func (x *UserEvent) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*UserEvent) ProtoMessage() {}
func (x *UserEvent) ProtoReflect() protoreflect.Message {
mi := &file_notifier_proto_notifier_proto_msgTypes[1]
if protoimpl.UnsafeEnabled && x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use UserEvent.ProtoReflect.Descriptor instead.
func (*UserEvent) Descriptor() ([]byte, []int) {
return file_notifier_proto_notifier_proto_rawDescGZIP(), []int{1}
}
func (x *UserEvent) GetTimestamp() *timestamppb.Timestamp {
if x != nil {
return x.Timestamp
}
return nil
}
func (x *UserEvent) GetAction() string {
if x != nil {
return x.Action
}
return ""
}
func (x *UserEvent) GetUser() []byte {
if x != nil {
return x.User
}
return nil
}
var File_notifier_proto_notifier_proto protoreflect.FileDescriptor
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}
var (
file_notifier_proto_notifier_proto_rawDescOnce sync.Once
file_notifier_proto_notifier_proto_rawDescData = file_notifier_proto_notifier_proto_rawDesc
)
func file_notifier_proto_notifier_proto_rawDescGZIP() []byte {
file_notifier_proto_notifier_proto_rawDescOnce.Do(func() {
file_notifier_proto_notifier_proto_rawDescData = protoimpl.X.CompressGZIP(file_notifier_proto_notifier_proto_rawDescData)
})
return file_notifier_proto_notifier_proto_rawDescData
}
var file_notifier_proto_notifier_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
var file_notifier_proto_notifier_proto_goTypes = []interface{}{
(*FsEvent)(nil), // 0: proto.FsEvent
(*UserEvent)(nil), // 1: proto.UserEvent
(*timestamppb.Timestamp)(nil), // 2: google.protobuf.Timestamp
(*emptypb.Empty)(nil), // 3: google.protobuf.Empty
}
var file_notifier_proto_notifier_proto_depIdxs = []int32{
2, // 0: proto.FsEvent.timestamp:type_name -> google.protobuf.Timestamp
2, // 1: proto.UserEvent.timestamp:type_name -> google.protobuf.Timestamp
0, // 2: proto.Notifier.SendFsEvent:input_type -> proto.FsEvent
1, // 3: proto.Notifier.SendUserEvent:input_type -> proto.UserEvent
3, // 4: proto.Notifier.SendFsEvent:output_type -> google.protobuf.Empty
3, // 5: proto.Notifier.SendUserEvent:output_type -> google.protobuf.Empty
4, // [4:6] is the sub-list for method output_type
2, // [2:4] is the sub-list for method input_type
2, // [2:2] is the sub-list for extension type_name
2, // [2:2] is the sub-list for extension extendee
0, // [0:2] is the sub-list for field type_name
}
func init() { file_notifier_proto_notifier_proto_init() }
func file_notifier_proto_notifier_proto_init() {
if File_notifier_proto_notifier_proto != nil {
return
}
if !protoimpl.UnsafeEnabled {
file_notifier_proto_notifier_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
switch v := v.(*FsEvent); i {
case 0:
return &v.state
case 1:
return &v.sizeCache
case 2:
return &v.unknownFields
default:
return nil
}
}
file_notifier_proto_notifier_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
switch v := v.(*UserEvent); i {
case 0:
return &v.state
case 1:
return &v.sizeCache
case 2:
return &v.unknownFields
default:
return nil
}
}
}
type x struct{}
out := protoimpl.TypeBuilder{
File: protoimpl.DescBuilder{
GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
RawDescriptor: file_notifier_proto_notifier_proto_rawDesc,
NumEnums: 0,
NumMessages: 2,
NumExtensions: 0,
NumServices: 1,
},
GoTypes: file_notifier_proto_notifier_proto_goTypes,
DependencyIndexes: file_notifier_proto_notifier_proto_depIdxs,
MessageInfos: file_notifier_proto_notifier_proto_msgTypes,
}.Build()
File_notifier_proto_notifier_proto = out.File
file_notifier_proto_notifier_proto_rawDesc = nil
file_notifier_proto_notifier_proto_goTypes = nil
file_notifier_proto_notifier_proto_depIdxs = nil
}
// Reference imports to suppress errors if they are not otherwise used.
var _ context.Context
var _ grpc.ClientConnInterface
// This is a compile-time assertion to ensure that this generated file
// is compatible with the grpc package it is being compiled against.
const _ = grpc.SupportPackageIsVersion6
// NotifierClient is the client API for Notifier service.
//
// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
type NotifierClient interface {
SendFsEvent(ctx context.Context, in *FsEvent, opts ...grpc.CallOption) (*emptypb.Empty, error)
SendUserEvent(ctx context.Context, in *UserEvent, opts ...grpc.CallOption) (*emptypb.Empty, error)
}
type notifierClient struct {
cc grpc.ClientConnInterface
}
func NewNotifierClient(cc grpc.ClientConnInterface) NotifierClient {
return &notifierClient{cc}
}
func (c *notifierClient) SendFsEvent(ctx context.Context, in *FsEvent, opts ...grpc.CallOption) (*emptypb.Empty, error) {
out := new(emptypb.Empty)
err := c.cc.Invoke(ctx, "/proto.Notifier/SendFsEvent", in, out, opts...)
if err != nil {
return nil, err
}
return out, nil
}
func (c *notifierClient) SendUserEvent(ctx context.Context, in *UserEvent, opts ...grpc.CallOption) (*emptypb.Empty, error) {
out := new(emptypb.Empty)
err := c.cc.Invoke(ctx, "/proto.Notifier/SendUserEvent", in, out, opts...)
if err != nil {
return nil, err
}
return out, nil
}
// NotifierServer is the server API for Notifier service.
type NotifierServer interface {
SendFsEvent(context.Context, *FsEvent) (*emptypb.Empty, error)
SendUserEvent(context.Context, *UserEvent) (*emptypb.Empty, error)
}
// UnimplementedNotifierServer can be embedded to have forward compatible implementations.
type UnimplementedNotifierServer struct {
}
func (*UnimplementedNotifierServer) SendFsEvent(context.Context, *FsEvent) (*emptypb.Empty, error) {
return nil, status.Errorf(codes.Unimplemented, "method SendFsEvent not implemented")
}
func (*UnimplementedNotifierServer) SendUserEvent(context.Context, *UserEvent) (*emptypb.Empty, error) {
return nil, status.Errorf(codes.Unimplemented, "method SendUserEvent not implemented")
}
func RegisterNotifierServer(s *grpc.Server, srv NotifierServer) {
s.RegisterService(&_Notifier_serviceDesc, srv)
}
func _Notifier_SendFsEvent_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(FsEvent)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(NotifierServer).SendFsEvent(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: "/proto.Notifier/SendFsEvent",
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(NotifierServer).SendFsEvent(ctx, req.(*FsEvent))
}
return interceptor(ctx, in, info, handler)
}
func _Notifier_SendUserEvent_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(UserEvent)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(NotifierServer).SendUserEvent(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: "/proto.Notifier/SendUserEvent",
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(NotifierServer).SendUserEvent(ctx, req.(*UserEvent))
}
return interceptor(ctx, in, info, handler)
}
var _Notifier_serviceDesc = grpc.ServiceDesc{
ServiceName: "proto.Notifier",
HandlerType: (*NotifierServer)(nil),
Methods: []grpc.MethodDesc{
{
MethodName: "SendFsEvent",
Handler: _Notifier_SendFsEvent_Handler,
},
{
MethodName: "SendUserEvent",
Handler: _Notifier_SendUserEvent_Handler,
},
},
Streams: []grpc.StreamDesc{},
Metadata: "notifier/proto/notifier.proto",
}

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@@ -0,0 +1,30 @@
syntax = "proto3";
package proto;
import "google/protobuf/timestamp.proto";
import "google/protobuf/empty.proto";
option go_package = "sdk/plugin/notifier/proto";
message FsEvent {
google.protobuf.Timestamp timestamp = 1;
string action = 2;
string username = 3;
string fs_path = 4;
string fs_target_path = 5;
string ssh_cmd = 6;
int64 file_size = 7;
string protocol = 8;
int32 status = 9;
}
message UserEvent {
google.protobuf.Timestamp timestamp = 1;
string action = 2;
bytes user = 3; // SFTPGo user json serialized
}
service Notifier {
rpc SendFsEvent(FsEvent) returns (google.protobuf.Empty);
rpc SendUserEvent(UserEvent) returns (google.protobuf.Empty);
}