Feeds service (#24)

blog/feeds/.gitignore

@@ -0,0 +1,2 @@
+
+feeds

blog/feeds/Dockerfile

@@ -0,0 +1,3 @@
+FROM alpine
+ADD feeds /feeds
+ENTRYPOINT [ "/feeds" ]

blog/feeds/Makefile

@@ -0,0 +1,22 @@
+
+GOPATH:=$(shell go env GOPATH)
+.PHONY: init
+init:
+	go get -u github.com/golang/protobuf/proto
+	go get -u github.com/golang/protobuf/protoc-gen-go
+	go get github.com/micro/micro/v3/cmd/protoc-gen-micro
+.PHONY: proto
+proto:
+	protoc --proto_path=. --micro_out=. --go_out=:. proto/feeds.proto
+	
+.PHONY: build
+build:
+	go build -o feeds *.go
+
+.PHONY: test
+test:
+	go test -v ./... -cover
+
+.PHONY: docker
+docker:
+	docker build . -t feeds:latest

blog/feeds/README.md

@@ -0,0 +1,56 @@
+# Feeds Service
+
+This is the Feeds service
+
+Generated with
+
+```
+micro new feeds
+```
+
+## Usage
+
+
+```
+micro feeds new --name="az" --address=http://a16z.com/feed/
+```
+
+```
+$ micro posts query
+{
+	"posts": [
+		{
+			"id": "39cdfbd6e7534bcd868be9eebbf43f8f",
+			"title": "Anthony Albanese: From the NYSE to Crypto",
+			"slug": "anthony-albanese-from-the-nyse-to-crypto",
+			"created": "1605104742",
+			"updated": "1605105364",
+			"metadata": {
+				"domain": "a16z.com",
+				"link": "https://a16z.com/2020/10/28/anthony-albanese-from-the-nyse-to-crypto/"
+			}
+		},
+		{
+			"id": "5e9285c01311704e204322ba564cd99e",
+			"title": "Journal Club: From Insect Eyes to Nanomaterials",
+			"slug": "journal-club-from-insect-eyes-to-nanomaterials",
+			"created": "1605104741",
+			"updated": "1605105363",
+			"metadata": {
+				"domain": "a16z.com",
+				"link": "https://a16z.com/2020/10/29/journal-club-insect-eyes-nanomaterials/"
+			}
+		},
+	]
+}
+```
+
+```
+make proto
+```
+
+Run the service
+
+```
+micro run .
+```

blog/feeds/generate.go

@@ -0,0 +1,2 @@
+package main
+//go:generate make proto

blog/feeds/handler/crawl.go

@@ -0,0 +1,70 @@
+package handler
+
+import (
+	"context"
+	"crypto/md5"
+	"fmt"
+
+	"net/url"
+
+	"github.com/SlyMarbo/rss"
+	log "github.com/micro/micro/v3/service/logger"
+	feeds "github.com/micro/services/blog/feeds/proto"
+	posts "github.com/micro/services/blog/posts/proto"
+)
+
+func (e *Feeds) fetchAll() {
+	fs := []*feeds.Feed{}
+	err := e.feeds.List(e.feedsNameIndex.ToQuery(nil), &fs)
+	if err != nil {
+		log.Errorf("Error listing feeds: %v", err)
+		return
+	}
+	if len(fs) == 0 {
+		log.Infof("No feeds to fetch")
+		return
+	}
+	for _, feed := range fs {
+		log.Infof("Fetching address %v", feed.Address)
+		fd, err := rss.Fetch(feed.Address)
+		if err != nil {
+			log.Errorf("Error fetching address %v: %v", feed.Address, err)
+			continue
+		}
+		domain := getDomain(feed.Address)
+
+		for _, item := range fd.Items {
+			id := fmt.Sprintf("%x", md5.Sum([]byte(item.ID)))
+			err = e.entries.Save(feeds.Entry{
+				Id:      id,
+				Url:     item.Link,
+				Title:   item.Title,
+				Domain:  domain,
+				Content: item.Summary,
+				Date:    item.Date.Unix(),
+			})
+			if err != nil {
+				log.Errorf("Error saving item: %v", err)
+			}
+			// @todo make this optional
+			_, err := e.postsService.Save(context.TODO(), &posts.SaveRequest{
+				Id:        id,
+				Title:     item.Title,
+				Content:   item.Content,
+				Timestamp: item.Date.Unix(),
+				Metadata: map[string]string{
+					"domain": domain,
+					"link":   item.Link,
+				},
+			})
+			if err != nil {
+				log.Errorf("Error saving post: %v", err)
+			}
+		}
+	}
+}
+
+func getDomain(address string) string {
+	uri, _ := url.Parse(address)
+	return uri.Host
+}

blog/feeds/handler/feeds.go

@@ -0,0 +1,78 @@
+package handler
+
+import (
+	"context"
+	"time"
+
+	"github.com/micro/dev/model"
+	log "github.com/micro/micro/v3/service/logger"
+	"github.com/micro/micro/v3/service/store"
+
+	feeds "github.com/micro/services/blog/feeds/proto"
+	posts "github.com/micro/services/blog/posts/proto"
+)
+
+type Feeds struct {
+	feeds            model.Model
+	entries          model.Model
+	postsService     posts.PostsService
+	feedsIdIndex     model.Index
+	feedsNameIndex   model.Index
+	entriesDateIndex model.Index
+}
+
+func NewFeeds(postsService posts.PostsService) *Feeds {
+	idIndex := model.ByEquality("address")
+	idIndex.Order.Type = model.OrderTypeUnordered
+
+	nameIndex := model.ByEquality("name")
+	nameIndex.Unique = true
+	nameIndex.Order.Type = model.OrderTypeUnordered
+
+	dateIndex := model.ByEquality("date")
+	dateIndex.Order.Type = model.OrderTypeDesc
+
+	f := &Feeds{
+		feeds: model.New(
+			store.DefaultStore,
+			"feeds",
+			model.Indexes(nameIndex),
+			&model.ModelOptions{
+				Debug:   false,
+				IdIndex: idIndex,
+			},
+		),
+		entries: model.New(
+			store.DefaultStore,
+			"entries",
+			model.Indexes(dateIndex),
+			&model.ModelOptions{
+				Debug: false,
+			},
+		),
+		postsService:     postsService,
+		feedsIdIndex:     idIndex,
+		feedsNameIndex:   nameIndex,
+		entriesDateIndex: dateIndex,
+	}
+
+	go f.crawl()
+	return f
+}
+
+func (e *Feeds) crawl() {
+	e.fetchAll()
+	tick := time.NewTicker(1 * time.Hour)
+	for _ = range tick.C {
+		e.fetchAll()
+	}
+}
+
+func (e *Feeds) New(ctx context.Context, req *feeds.NewRequest, rsp *feeds.NewResponse) error {
+	log.Info("Received Feeds.New request")
+	e.feeds.Save(feeds.Feed{
+		Name:    req.Name,
+		Address: req.Address,
+	})
+	return nil
+}

blog/feeds/main.go

@@ -0,0 +1,27 @@
+package main
+
+import (
+	pb "github.com/micro/services/blog/feeds/proto"
+	posts "github.com/micro/services/blog/posts/proto"
+
+	"github.com/micro/services/blog/feeds/handler"
+
+	"github.com/micro/micro/v3/service"
+	"github.com/micro/micro/v3/service/logger"
+)
+
+func main() {
+	// Create service
+	srv := service.New(
+		service.Name("feeds"),
+		service.Version("latest"),
+	)
+
+	// Register handler
+	pb.RegisterFeedsHandler(srv.Server(), handler.NewFeeds(posts.NewPostsService("posts", srv.Client())))
+
+	// Run service
+	if err := srv.Run(); err != nil {
+		logger.Fatal(err)
+	}
+}

blog/feeds/micro.mu

@@ -0,0 +1 @@
+service feeds

blog/feeds/proto/feeds.pb.go

@@ -0,0 +1,257 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: proto/feeds.proto
+
+package feeds
+
+import (
+	fmt "fmt"
+	proto "github.com/golang/protobuf/proto"
+	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 Feed struct {
+	// rss feed name
+	Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
+	// rss feed address
+	Address              string   `protobuf:"bytes,2,opt,name=address,proto3" json:"address,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *Feed) Reset()         { *m = Feed{} }
+func (m *Feed) String() string { return proto.CompactTextString(m) }
+func (*Feed) ProtoMessage()    {}
+func (*Feed) Descriptor() ([]byte, []int) {
+	return fileDescriptor_dd517c38176c13bf, []int{0}
+}
+
+func (m *Feed) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Feed.Unmarshal(m, b)
+}
+func (m *Feed) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Feed.Marshal(b, m, deterministic)
+}
+func (m *Feed) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Feed.Merge(m, src)
+}
+func (m *Feed) XXX_Size() int {
+	return xxx_messageInfo_Feed.Size(m)
+}
+func (m *Feed) XXX_DiscardUnknown() {
+	xxx_messageInfo_Feed.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Feed proto.InternalMessageInfo
+
+func (m *Feed) GetName() string {
+	if m != nil {
+		return m.Name
+	}
+	return ""
+}
+
+func (m *Feed) GetAddress() string {
+	if m != nil {
+		return m.Address
+	}
+	return ""
+}
+
+type Entry struct {
+	Id                   string   `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
+	Domain               string   `protobuf:"bytes,2,opt,name=domain,proto3" json:"domain,omitempty"`
+	Url                  string   `protobuf:"bytes,3,opt,name=url,proto3" json:"url,omitempty"`
+	Title                string   `protobuf:"bytes,4,opt,name=title,proto3" json:"title,omitempty"`
+	Content              string   `protobuf:"bytes,5,opt,name=content,proto3" json:"content,omitempty"`
+	Date                 int64    `protobuf:"varint,6,opt,name=date,proto3" json:"date,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *Entry) Reset()         { *m = Entry{} }
+func (m *Entry) String() string { return proto.CompactTextString(m) }
+func (*Entry) ProtoMessage()    {}
+func (*Entry) Descriptor() ([]byte, []int) {
+	return fileDescriptor_dd517c38176c13bf, []int{1}
+}
+
+func (m *Entry) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Entry.Unmarshal(m, b)
+}
+func (m *Entry) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Entry.Marshal(b, m, deterministic)
+}
+func (m *Entry) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Entry.Merge(m, src)
+}
+func (m *Entry) XXX_Size() int {
+	return xxx_messageInfo_Entry.Size(m)
+}
+func (m *Entry) XXX_DiscardUnknown() {
+	xxx_messageInfo_Entry.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Entry proto.InternalMessageInfo
+
+func (m *Entry) GetId() string {
+	if m != nil {
+		return m.Id
+	}
+	return ""
+}
+
+func (m *Entry) GetDomain() string {
+	if m != nil {
+		return m.Domain
+	}
+	return ""
+}
+
+func (m *Entry) GetUrl() string {
+	if m != nil {
+		return m.Url
+	}
+	return ""
+}
+
+func (m *Entry) GetTitle() string {
+	if m != nil {
+		return m.Title
+	}
+	return ""
+}
+
+func (m *Entry) GetContent() string {
+	if m != nil {
+		return m.Content
+	}
+	return ""
+}
+
+func (m *Entry) GetDate() int64 {
+	if m != nil {
+		return m.Date
+	}
+	return 0
+}
+
+type NewRequest struct {
+	Name                 string   `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
+	Address              string   `protobuf:"bytes,2,opt,name=address,proto3" json:"address,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *NewRequest) Reset()         { *m = NewRequest{} }
+func (m *NewRequest) String() string { return proto.CompactTextString(m) }
+func (*NewRequest) ProtoMessage()    {}
+func (*NewRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_dd517c38176c13bf, []int{2}
+}
+
+func (m *NewRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_NewRequest.Unmarshal(m, b)
+}
+func (m *NewRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_NewRequest.Marshal(b, m, deterministic)
+}
+func (m *NewRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_NewRequest.Merge(m, src)
+}
+func (m *NewRequest) XXX_Size() int {
+	return xxx_messageInfo_NewRequest.Size(m)
+}
+func (m *NewRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_NewRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_NewRequest proto.InternalMessageInfo
+
+func (m *NewRequest) GetName() string {
+	if m != nil {
+		return m.Name
+	}
+	return ""
+}
+
+func (m *NewRequest) GetAddress() string {
+	if m != nil {
+		return m.Address
+	}
+	return ""
+}
+
+type NewResponse struct {
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *NewResponse) Reset()         { *m = NewResponse{} }
+func (m *NewResponse) String() string { return proto.CompactTextString(m) }
+func (*NewResponse) ProtoMessage()    {}
+func (*NewResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_dd517c38176c13bf, []int{3}
+}
+
+func (m *NewResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_NewResponse.Unmarshal(m, b)
+}
+func (m *NewResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_NewResponse.Marshal(b, m, deterministic)
+}
+func (m *NewResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_NewResponse.Merge(m, src)
+}
+func (m *NewResponse) XXX_Size() int {
+	return xxx_messageInfo_NewResponse.Size(m)
+}
+func (m *NewResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_NewResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_NewResponse proto.InternalMessageInfo
+
+func init() {
+	proto.RegisterType((*Feed)(nil), "feeds.Feed")
+	proto.RegisterType((*Entry)(nil), "feeds.Entry")
+	proto.RegisterType((*NewRequest)(nil), "feeds.NewRequest")
+	proto.RegisterType((*NewResponse)(nil), "feeds.NewResponse")
+}
+
+func init() {
+	proto.RegisterFile("proto/feeds.proto", fileDescriptor_dd517c38176c13bf)
+}
+
+var fileDescriptor_dd517c38176c13bf = []byte{
+	// 235 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0x94, 0x90, 0xb1, 0x4a, 0x04, 0x31,
+	0x10, 0x86, 0xdd, 0xdb, 0xcd, 0x8a, 0x73, 0x9c, 0x78, 0x83, 0x48, 0xb0, 0x92, 0xad, 0xac, 0x56,
+	0x50, 0x41, 0xd0, 0x4e, 0xd0, 0xd2, 0x62, 0x4b, 0xbb, 0xd5, 0x8c, 0xb0, 0x70, 0x97, 0x9c, 0xc9,
+	0x2c, 0xe2, 0x03, 0xf8, 0xde, 0x26, 0x93, 0x88, 0xb6, 0x76, 0xff, 0xf7, 0x85, 0x3f, 0x93, 0x0c,
+	0xac, 0x77, 0xde, 0xb1, 0xbb, 0x78, 0x23, 0x32, 0xa1, 0x97, 0x8c, 0x4a, 0xa0, 0xbb, 0x86, 0xe6,
+	0x31, 0x06, 0x44, 0x68, 0xec, 0xb8, 0x25, 0x5d, 0x9d, 0x55, 0xe7, 0x07, 0x83, 0x64, 0xd4, 0xb0,
+	0x3f, 0x1a, 0xe3, 0x29, 0x04, 0xbd, 0x10, 0xfd, 0x83, 0xdd, 0x57, 0x05, 0xea, 0xc1, 0xb2, 0xff,
+	0xc4, 0x43, 0x58, 0x4c, 0xa6, 0xb4, 0x62, 0xc2, 0x13, 0x68, 0x8d, 0xdb, 0x8e, 0x93, 0x2d, 0x95,
+	0x42, 0x78, 0x04, 0xf5, 0xec, 0x37, 0xba, 0x16, 0x99, 0x22, 0x1e, 0x83, 0xe2, 0x89, 0x37, 0xa4,
+	0x1b, 0x71, 0x19, 0xd2, 0xcc, 0x57, 0x67, 0x99, 0x2c, 0x6b, 0x95, 0x67, 0x16, 0x4c, 0x2f, 0x34,
+	0x23, 0x93, 0x6e, 0xa3, 0xae, 0x07, 0xc9, 0xdd, 0x2d, 0xc0, 0x13, 0x7d, 0x0c, 0xf4, 0x3e, 0x53,
+	0xe0, 0x7f, 0xfe, 0x61, 0x05, 0x4b, 0xe9, 0x86, 0x9d, 0xb3, 0x81, 0x2e, 0x6f, 0x40, 0xa5, 0x45,
+	0x04, 0xec, 0xa1, 0x8e, 0x1e, 0xd7, 0x7d, 0xde, 0xd6, 0xef, 0xfd, 0xa7, 0xf8, 0x57, 0xe5, 0x5a,
+	0xb7, 0x77, 0xbf, 0x7a, 0x5e, 0xca, 0x46, 0xef, 0xe4, 0xf0, 0xa5, 0x15, 0xb8, 0xfa, 0x0e, 0x00,
+	0x00, 0xff, 0xff, 0x04, 0x4b, 0x80, 0xda, 0x73, 0x01, 0x00, 0x00,
+}

blog/feeds/proto/feeds.pb.micro.go

@@ -0,0 +1,93 @@
+// Code generated by protoc-gen-micro. DO NOT EDIT.
+// source: proto/feeds.proto
+
+package feeds
+
+import (
+	fmt "fmt"
+	proto "github.com/golang/protobuf/proto"
+	math "math"
+)
+
+import (
+	context "context"
+	api "github.com/micro/micro/v3/service/api"
+	client "github.com/micro/micro/v3/service/client"
+	server "github.com/micro/micro/v3/service/server"
+)
+
+// 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
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ api.Endpoint
+var _ context.Context
+var _ client.Option
+var _ server.Option
+
+// Api Endpoints for Feeds service
+
+func NewFeedsEndpoints() []*api.Endpoint {
+	return []*api.Endpoint{}
+}
+
+// Client API for Feeds service
+
+type FeedsService interface {
+	New(ctx context.Context, in *NewRequest, opts ...client.CallOption) (*NewResponse, error)
+}
+
+type feedsService struct {
+	c    client.Client
+	name string
+}
+
+func NewFeedsService(name string, c client.Client) FeedsService {
+	return &feedsService{
+		c:    c,
+		name: name,
+	}
+}
+
+func (c *feedsService) New(ctx context.Context, in *NewRequest, opts ...client.CallOption) (*NewResponse, error) {
+	req := c.c.NewRequest(c.name, "Feeds.New", in)
+	out := new(NewResponse)
+	err := c.c.Call(ctx, req, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// Server API for Feeds service
+
+type FeedsHandler interface {
+	New(context.Context, *NewRequest, *NewResponse) error
+}
+
+func RegisterFeedsHandler(s server.Server, hdlr FeedsHandler, opts ...server.HandlerOption) error {
+	type feeds interface {
+		New(ctx context.Context, in *NewRequest, out *NewResponse) error
+	}
+	type Feeds struct {
+		feeds
+	}
+	h := &feedsHandler{hdlr}
+	return s.Handle(s.NewHandler(&Feeds{h}, opts...))
+}
+
+type feedsHandler struct {
+	FeedsHandler
+}
+
+func (h *feedsHandler) New(ctx context.Context, in *NewRequest, out *NewResponse) error {
+	return h.FeedsHandler.New(ctx, in, out)
+}

blog/feeds/proto/feeds.proto

@@ -0,0 +1,33 @@
+syntax = "proto3";
+
+package feeds;
+
+option go_package = "proto;feeds";
+
+service Feeds {
+	rpc New(NewRequest) returns (NewResponse) {}
+}
+
+message Feed {
+	// rss feed name
+	string name = 1;
+	// rss feed address
+	string address = 2;
+}
+
+message Entry {
+	string id = 1;
+	string domain = 2;
+	string url = 3;
+	string title = 4;
+	string content = 5;
+	int64 date = 6;
+}
+
+message NewRequest {
+	string name = 1;
+	string address = 2;
+}
+
+message NewResponse {
+}