From f87c2194c84526894d3d3d148b35842aeaeda6fa Mon Sep 17 00:00:00 2001 From: Hamcha Date: Tue, 16 Jul 2019 18:03:16 +0200 Subject: [PATCH] Check in --- README.md | 13 ++ cmd/bacheca-moa/main.go | 60 ++++++++++ cmd/bacheca-server/main.go | 46 ++++++++ cmd/bacheca-static/main.go | 46 ++++++++ endpoints.go | 17 +++ go.mod | 12 ++ go.sum | 180 ++++++++++++++++++++++++++++ proto/bacheca.pb.go | 235 +++++++++++++++++++++++++++++++++++++ proto/bacheca.proto | 18 +++ service.go | 24 ++++ transport.go | 79 +++++++++++++ 11 files changed, 730 insertions(+) create mode 100644 README.md create mode 100644 cmd/bacheca-moa/main.go create mode 100644 cmd/bacheca-server/main.go create mode 100644 cmd/bacheca-static/main.go create mode 100644 endpoints.go create mode 100644 go.mod create mode 100644 go.sum create mode 100644 proto/bacheca.pb.go create mode 100644 proto/bacheca.proto create mode 100644 service.go create mode 100644 transport.go diff --git a/README.md b/README.md new file mode 100644 index 0000000..5aaa929 --- /dev/null +++ b/README.md @@ -0,0 +1,13 @@ +# bacheca + +RSS/Atom feed generator with a simple REST API (and hopefully gRPC) + +Written using go-kit and Moa but should work fine alone, given you have a good enough reverse proxy setup. + +## Things to note + +### Regenerate protobuf file + +```sh +protoc --go_out=plugins=grpc:. bacheca.proto +``` diff --git a/cmd/bacheca-moa/main.go b/cmd/bacheca-moa/main.go new file mode 100644 index 0000000..10d3d87 --- /dev/null +++ b/cmd/bacheca-moa/main.go @@ -0,0 +1,60 @@ +package main + +import ( + "flag" + "fmt" + "net/http" + "os" + "os/signal" + "syscall" + + "git.fromouter.space/Artificiale/moa/sd" + + "github.com/go-kit/kit/log" + + svc "git.abbiamoundominio.org/hamcha/bacheca" +) + +func main() { + httpPort := flag.Int("http.port", 8080, "HTTP listen port") + consulAddr := flag.String("consul.addr", "consul:8500", "Consul address") + flag.Parse() + + var logger log.Logger + { + logger = log.NewLogfmtLogger(os.Stderr) + logger = log.With(logger, "ts", log.DefaultTimestampUTC) + logger = log.With(logger, "caller", log.DefaultCaller) + } + + s := svc.MakeService() + handler := svc.MakeHTTPHandler(s, logger) + + // Register with consul + registrar := sd.Register(*consulAddr, sd.Options{ + Name: "bacheca", + Advertise: fmt.Sprintf("bacheca:%d", *httpPort), + Tags: []string{ + "http", // Expose via HTTP + "match-path:events", // Publish at /events/* + "private", // All APIs are private.. + "public:/feed", // ..except /feed + }, + }, logger) + defer registrar.Deregister() + + errs := make(chan error) + go func() { + c := make(chan os.Signal) + signal.Notify(c, syscall.SIGINT, syscall.SIGTERM) + errs <- fmt.Errorf("%s", <-c) + }() + + go func() { + bind := fmt.Sprintf(":%d", *httpPort) + logger.Log("transport", "HTTP", "addr", bind) + errs <- http.ListenAndServe(bind, handler) + }() + + logger.Log("exit", <-errs) +} diff --git a/cmd/bacheca-server/main.go b/cmd/bacheca-server/main.go new file mode 100644 index 0000000..8cf34af --- /dev/null +++ b/cmd/bacheca-server/main.go @@ -0,0 +1,46 @@ +package main + +import ( + "flag" + "fmt" + "net/http" + "os" + "os/signal" + "syscall" + + "github.com/go-kit/kit/log" + + svc "git.abbiamoundominio.org/hamcha/bacheca" +) + +func main() { + httpPort := flag.Int("http.port", 8080, "HTTP listen port") + flag.Parse() + + var logger log.Logger + { + logger = log.NewLogfmtLogger(os.Stderr) + logger = log.With(logger, "ts", log.DefaultTimestampUTC) + logger = log.With(logger, "caller", log.DefaultCaller) + } + + s := svc.MakeService() + handler := svc.MakeHTTPHandler(s, logger) + + //TODO Add auth middleware + + errs := make(chan error) + go func() { + c := make(chan os.Signal) + signal.Notify(c, syscall.SIGINT, syscall.SIGTERM) + errs <- fmt.Errorf("%s", <-c) + }() + + go func() { + bind := fmt.Sprintf(":%d", *httpPort) + logger.Log("transport", "HTTP", "addr", bind) + errs <- http.ListenAndServe(bind, handler) + }() + + logger.Log("exit", <-errs) +} diff --git a/cmd/bacheca-static/main.go b/cmd/bacheca-static/main.go new file mode 100644 index 0000000..17e3ff3 --- /dev/null +++ b/cmd/bacheca-static/main.go @@ -0,0 +1,46 @@ +package main + +import ( + "context" + "flag" + "fmt" + "os" + "strings" + + proto "git.abbiamoundominio.org/hamcha/bacheca/proto" + + "github.com/go-kit/kit/log" + + svc "git.abbiamoundominio.org/hamcha/bacheca" +) + +func main() { + format := flag.String("fmt", "rss", "Feed format (rss, atom, json)") + flag.Parse() + + ftype := strings.ToUpper(*format) + fid, ok := proto.GetFeedRequest_FeedType_value[ftype] + if !ok { + panic("invalid format (-fmt), check help for supported formats") + } + + var logger log.Logger + { + logger = log.NewLogfmtLogger(os.Stderr) + logger = log.With(logger, "ts", log.DefaultTimestampUTC) + logger = log.With(logger, "caller", log.DefaultCaller) + } + + s := svc.MakeService() + + req := &proto.GetFeedRequest{ + FeedType: proto.GetFeedRequest_FeedType(fid), + } + rsp := &proto.GetFeedResponse{} + err := s.GetFeed(context.Background(), req, rsp) + if err != nil { + panic(err) + } + + fmt.Print(rsp.Data) +} diff --git a/endpoints.go b/endpoints.go new file mode 100644 index 0000000..07b9204 --- /dev/null +++ b/endpoints.go @@ -0,0 +1,17 @@ +package bacheca + +import ( + "context" + + proto "git.abbiamoundominio.org/hamcha/bacheca/proto" + "github.com/go-kit/kit/endpoint" +) + +func getFeedEndpoint(svc Service) endpoint.Endpoint { + return func(ctx context.Context, request interface{}) (interface{}, error) { + req := request.(proto.GetFeedRequest) + rsp := proto.GetFeedResponse{} + err := svc.GetFeed(ctx, &req, &rsp) + return rsp, err + } +} diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..fdc306b --- /dev/null +++ b/go.mod @@ -0,0 +1,12 @@ +module git.abbiamoundominio.org/hamcha/bacheca + +go 1.12 + +require ( + git.fromouter.space/Artificiale/moa v0.0.1 + git.fromouter.space/mcg/cardgage 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DO NOT EDIT. +// source: bacheca.proto + +package bacheca + +import ( + context "context" + fmt "fmt" + proto "github.com/golang/protobuf/proto" + grpc "google.golang.org/grpc" + codes "google.golang.org/grpc/codes" + status "google.golang.org/grpc/status" + math "math" +) + +// Reference imports to suppress errors if they are not otherwise used. +var _ = proto.Marshal +var _ = fmt.Errorf +var _ = math.Inf + +// This is a compile-time assertion to ensure that this generated file +// is compatible with the proto package it is being compiled against. +// A compilation error at this line likely means your copy of the +// proto package needs to be updated. +const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package + +type GetFeedRequest_FeedType int32 + +const ( + GetFeedRequest_RSS GetFeedRequest_FeedType = 0 + GetFeedRequest_ATOM GetFeedRequest_FeedType = 1 + GetFeedRequest_JSON GetFeedRequest_FeedType = 2 +) + +var GetFeedRequest_FeedType_name = map[int32]string{ + 0: "RSS", + 1: "ATOM", + 2: "JSON", +} + +var GetFeedRequest_FeedType_value = map[string]int32{ + "RSS": 0, + "ATOM": 1, + "JSON": 2, +} + +func (x GetFeedRequest_FeedType) String() string { + return proto.EnumName(GetFeedRequest_FeedType_name, int32(x)) +} + +func (GetFeedRequest_FeedType) EnumDescriptor() ([]byte, []int) { + return fileDescriptor_fb1fda27af5c282e, []int{0, 0} +} + +type GetFeedRequest struct { + FeedType GetFeedRequest_FeedType `protobuf:"varint,1,opt,name=feedType,proto3,enum=GetFeedRequest_FeedType" json:"feedType,omitempty"` + XXX_NoUnkeyedLiteral struct{} `json:"-"` + XXX_unrecognized []byte `json:"-"` + XXX_sizecache int32 `json:"-"` +} + +func (m *GetFeedRequest) Reset() { *m = GetFeedRequest{} } +func (m *GetFeedRequest) String() string { return proto.CompactTextString(m) } +func (*GetFeedRequest) ProtoMessage() {} +func (*GetFeedRequest) Descriptor() ([]byte, []int) { + return fileDescriptor_fb1fda27af5c282e, []int{0} +} + +func (m *GetFeedRequest) XXX_Unmarshal(b []byte) error { + return xxx_messageInfo_GetFeedRequest.Unmarshal(m, b) +} +func (m *GetFeedRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) { + return xxx_messageInfo_GetFeedRequest.Marshal(b, m, deterministic) +} +func (m *GetFeedRequest) XXX_Merge(src proto.Message) { + xxx_messageInfo_GetFeedRequest.Merge(m, src) +} +func (m *GetFeedRequest) XXX_Size() int { + return xxx_messageInfo_GetFeedRequest.Size(m) +} +func (m *GetFeedRequest) XXX_DiscardUnknown() { + xxx_messageInfo_GetFeedRequest.DiscardUnknown(m) +} + +var xxx_messageInfo_GetFeedRequest proto.InternalMessageInfo + +func (m *GetFeedRequest) GetFeedType() GetFeedRequest_FeedType { + if m != nil { + return m.FeedType + } + return GetFeedRequest_RSS +} + +type GetFeedResponse struct { + Data string `protobuf:"bytes,1,opt,name=data,proto3" json:"data,omitempty"` + XXX_NoUnkeyedLiteral struct{} `json:"-"` + XXX_unrecognized []byte `json:"-"` + XXX_sizecache int32 `json:"-"` +} + +func (m *GetFeedResponse) Reset() { *m = GetFeedResponse{} } +func (m *GetFeedResponse) String() string { return proto.CompactTextString(m) } +func (*GetFeedResponse) ProtoMessage() {} +func (*GetFeedResponse) Descriptor() ([]byte, []int) { + return fileDescriptor_fb1fda27af5c282e, []int{1} +} + +func (m *GetFeedResponse) XXX_Unmarshal(b []byte) error { + return xxx_messageInfo_GetFeedResponse.Unmarshal(m, b) +} +func (m *GetFeedResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) { + return xxx_messageInfo_GetFeedResponse.Marshal(b, m, deterministic) +} +func (m *GetFeedResponse) XXX_Merge(src proto.Message) { + xxx_messageInfo_GetFeedResponse.Merge(m, src) +} +func (m *GetFeedResponse) XXX_Size() int { + return xxx_messageInfo_GetFeedResponse.Size(m) +} +func (m *GetFeedResponse) XXX_DiscardUnknown() { + xxx_messageInfo_GetFeedResponse.DiscardUnknown(m) +} + +var xxx_messageInfo_GetFeedResponse proto.InternalMessageInfo + +func (m *GetFeedResponse) GetData() string { + if m != nil { + return m.Data + } + return "" +} + +func init() { + proto.RegisterEnum("GetFeedRequest_FeedType", GetFeedRequest_FeedType_name, GetFeedRequest_FeedType_value) + proto.RegisterType((*GetFeedRequest)(nil), "GetFeedRequest") + proto.RegisterType((*GetFeedResponse)(nil), "GetFeedResponse") +} + +func init() { proto.RegisterFile("bacheca.proto", fileDescriptor_fb1fda27af5c282e) } + +var fileDescriptor_fb1fda27af5c282e = []byte{ + // 178 bytes of a gzipped FileDescriptorProto + 0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0xe2, 0x4d, 0x4a, 0x4c, 0xce, + 0x48, 0x4d, 0x4e, 0xd4, 0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x57, 0xca, 0xe7, 0xe2, 0x73, 0x4f, 0x2d, + 0x71, 0x4b, 0x4d, 0x4d, 0x09, 0x4a, 0x2d, 0x2c, 0x4d, 0x2d, 0x2e, 0x11, 0x32, 0xe1, 0xe2, 0x48, + 0x4b, 0x4d, 0x4d, 0x09, 0xa9, 0x2c, 0x48, 0x95, 0x60, 0x54, 0x60, 0xd4, 0xe0, 0x33, 0x92, 0xd0, + 0x43, 0x55, 0xa2, 0xe7, 0x06, 0x95, 0x0f, 0x82, 0xab, 0x54, 0x52, 0xe7, 0xe2, 0x80, 0x89, 0x0a, + 0xb1, 0x73, 0x31, 0x07, 0x05, 0x07, 0x0b, 0x30, 0x08, 0x71, 0x70, 0xb1, 0x38, 0x86, 0xf8, 0xfb, + 0x0a, 0x30, 0x82, 0x58, 0x5e, 0xc1, 0xfe, 0x7e, 0x02, 0x4c, 0x4a, 0xaa, 0x5c, 0xfc, 0x70, 0xd3, + 0x8a, 0x0b, 0xf2, 0xf3, 0x8a, 0x53, 0x85, 0x84, 0xb8, 0x58, 0x52, 0x12, 0x4b, 0x12, 0xc1, 0xb6, + 0x71, 0x06, 0x81, 0xd9, 0x46, 0xe6, 0x5c, 0xac, 0x3e, 0xf9, 0x49, 0x49, 0x95, 0x42, 0x7a, 0x5c, + 0xec, 0x50, 0xf5, 0x42, 0xfc, 0x68, 0xee, 0x90, 0x12, 0xd0, 0x43, 0x33, 0x4a, 0x89, 0x21, 0x89, + 0x0d, 0xec, 0x2f, 0x63, 0x40, 0x00, 0x00, 0x00, 0xff, 0xff, 0xaf, 0x00, 0x13, 0xe2, 0xe8, 0x00, + 0x00, 0x00, +} + +// Reference imports to suppress errors if they are not otherwise used. +var _ context.Context +var _ grpc.ClientConn + +// 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.SupportPackageIsVersion4 + +// LobbyClient is the client API for Lobby service. +// +// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream. +type LobbyClient interface { + GetFeed(ctx context.Context, in *GetFeedRequest, opts ...grpc.CallOption) (*GetFeedResponse, error) +} + +type lobbyClient struct { + cc *grpc.ClientConn +} + +func NewLobbyClient(cc *grpc.ClientConn) LobbyClient { + return &lobbyClient{cc} +} + +func (c *lobbyClient) GetFeed(ctx context.Context, in *GetFeedRequest, opts ...grpc.CallOption) (*GetFeedResponse, error) { + out := new(GetFeedResponse) + err := c.cc.Invoke(ctx, "/Lobby/GetFeed", in, out, opts...) + if err != nil { + return nil, err + } + return out, nil +} + +// LobbyServer is the server API for Lobby service. +type LobbyServer interface { + GetFeed(context.Context, *GetFeedRequest) (*GetFeedResponse, error) +} + +// UnimplementedLobbyServer can be embedded to have forward compatible implementations. +type UnimplementedLobbyServer struct { +} + +func (*UnimplementedLobbyServer) GetFeed(ctx context.Context, req *GetFeedRequest) (*GetFeedResponse, error) { + return nil, status.Errorf(codes.Unimplemented, "method GetFeed not implemented") +} + +func RegisterLobbyServer(s *grpc.Server, srv LobbyServer) { + s.RegisterService(&_Lobby_serviceDesc, srv) +} + +func _Lobby_GetFeed_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) { + in := new(GetFeedRequest) + if err := dec(in); err != nil { + return nil, err + } + if interceptor == nil { + return srv.(LobbyServer).GetFeed(ctx, in) + } + info := &grpc.UnaryServerInfo{ + Server: srv, + FullMethod: "/Lobby/GetFeed", + } + handler := func(ctx context.Context, req interface{}) (interface{}, error) { + return srv.(LobbyServer).GetFeed(ctx, req.(*GetFeedRequest)) + } + return interceptor(ctx, in, info, handler) +} + +var _Lobby_serviceDesc = grpc.ServiceDesc{ + ServiceName: "Lobby", + HandlerType: (*LobbyServer)(nil), + Methods: []grpc.MethodDesc{ + { + MethodName: "GetFeed", + Handler: _Lobby_GetFeed_Handler, + }, + }, + Streams: []grpc.StreamDesc{}, + Metadata: "bacheca.proto", +} diff --git a/proto/bacheca.proto b/proto/bacheca.proto new file mode 100644 index 0000000..e900288 --- /dev/null +++ b/proto/bacheca.proto @@ -0,0 +1,18 @@ +syntax = "proto3"; + +service Lobby { + rpc GetFeed(GetFeedRequest) returns (GetFeedResponse) {} +} + +message GetFeedRequest { + enum FeedType { + RSS = 0; + ATOM = 1; + JSON = 2; + } + FeedType feedType = 1; +} + +message GetFeedResponse { + string data = 1; +} diff --git a/service.go b/service.go new file mode 100644 index 0000000..a3d407f --- /dev/null +++ b/service.go @@ -0,0 +1,24 @@ +package bacheca + +import ( + "context" + "errors" + + proto "git.abbiamoundominio.org/hamcha/bacheca/proto" +) + +// Service is the definition of the Bacheca service +type Service interface { + GetFeed(context.Context, *proto.GetFeedRequest, *proto.GetFeedResponse) error +} + +type bachecaService struct { +} + +func MakeService() Service { + return &bachecaService{} +} + +func (b *bachecaService) GetFeed(ctx context.Context, req *proto.GetFeedRequest, rsp *proto.GetFeedResponse) error { + return errors.New("not implemented") +} diff --git a/transport.go b/transport.go new file mode 100644 index 0000000..4368afd --- /dev/null +++ b/transport.go @@ -0,0 +1,79 @@ +package bacheca + +import ( + "context" + "errors" + "fmt" + "net/http" + "strings" + + proto "git.abbiamoundominio.org/hamcha/bacheca/proto" + "git.fromouter.space/Artificiale/moa/sd" + "github.com/go-kit/kit/log" + httptransport "github.com/go-kit/kit/transport/http" + "github.com/gorilla/mux" +) + +// Request errors +var ( + ErrInvalidFormat = errors.New("invalid format (use 'rss', 'atom', 'json')") +) + +// MakeHTTPHandler makes the service available via HTTP +func MakeHTTPHandler(svc Service, logger log.Logger) http.Handler { + r := mux.NewRouter() + options := []httptransport.ServerOption{ + httptransport.ServerErrorLogger(logger), + httptransport.ServerErrorEncoder(encodeError), + } + + r.Methods("GET").Path("/feed").Handler(httptransport.NewServer( + getFeedEndpoint(svc), + decodeFeedRequest, + encodeFeedResponse, + options..., + )) + + sd.RegisterHealthHandler(r) + + return r +} + +func decodeFeedRequest(_ context.Context, r *http.Request) (interface{}, error) { + url := r.URL.Query() + request := proto.GetFeedRequest{ + FeedType: proto.GetFeedRequest_RSS, + } + if typ := url.Get("type"); typ != "" { + ftype := strings.ToUpper(typ) + fid, ok := proto.GetFeedRequest_FeedType_value[ftype] + if !ok { + return nil, ErrInvalidFormat + } + request.FeedType = proto.GetFeedRequest_FeedType(fid) + } + return request, nil +} + +func encodeFeedResponse(_ context.Context, w http.ResponseWriter, response interface{}) error { + resp := response.(proto.GetFeedResponse) + _, err := fmt.Fprint(w, resp.Data) + return err +} + +func encodeError(_ context.Context, err error, w http.ResponseWriter) { + if err == nil { + panic("encodeError with nil error") + } + w.Header().Set("Content-Type", "application/json; charset=utf-8") + w.WriteHeader(codeFrom(err)) +} + +func codeFrom(err error) int { + switch err { + case ErrInvalidFormat: + return http.StatusBadRequest + default: + return http.StatusInternalServerError + } +}