URL shortening service (#104)

* URL shortening service

* Url shortener -> url

* Readme edit

go.mod

@@ -18,6 +18,7 @@ require (
 	github.com/pquerna/otp v1.3.0
 	github.com/stoewer/go-strcase v1.2.0
 	github.com/stretchr/testify v1.7.0
+	github.com/teris-io/shortid v0.0.0-20171029131806-771a37caa5cf
 	github.com/ulikunitz/xz v0.5.8 // indirect
 	golang.org/x/crypto v0.0.0-20210220033148-5ea612d1eb83
 	golang.org/x/net v0.0.0-20201021035429-f5854403a974

url/.gitignore

@@ -0,0 +1,2 @@
+
+url-shortener

url/Dockerfile

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

url/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/url.proto
+	
+.PHONY: build
+build:
+	go build -o url *.go
+
+.PHONY: test
+test:
+	go test -v ./... -cover
+
+.PHONY: docker
+docker:
+	docker build . -t url:latest

url/README.md

@@ -0,0 +1 @@
+URL shortening, sharing and analytics

url/generate.go

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

url/handler/url.go

@@ -0,0 +1,93 @@
+package handler
+
+import (
+	"context"
+	"errors"
+	"strings"
+
+	"github.com/micro/micro/v3/service/config"
+	"github.com/micro/micro/v3/service/model"
+	"github.com/teris-io/shortid"
+
+	"github.com/micro/services/pkg/tenant"
+	url "github.com/micro/services/url/proto"
+)
+
+const hostPrefix = "https://m3o.one/u"
+
+type Url struct {
+	pairs      model.Model
+	ownerIndex model.Index
+	hostPrefix string
+}
+
+func NewUrl() *Url {
+	var hp string
+	cfg, err := config.Get("micro.url_shortener.host_prefix")
+	if err != nil {
+		hp = cfg.String(hostPrefix)
+	}
+	if len(strings.TrimSpace(hp)) == 0 {
+		hp = hostPrefix
+	}
+
+	ownerIndex := model.ByEquality("Owner")
+	ownerIndex.Order.Type = model.OrderTypeUnordered
+
+	return &Url{
+		pairs: model.NewModel(
+			model.WithKey("ShortURL"),
+			model.WithIndexes(ownerIndex),
+		),
+		ownerIndex: ownerIndex,
+	}
+}
+
+func (e *Url) Shorten(ctx context.Context, req *url.ShortenRequest, rsp *url.ShortenResponse) error {
+	tenantID, ok := tenant.FromContext(ctx)
+	if !ok {
+		return errors.New("Not authorized")
+	}
+	sid, err := shortid.New(1, shortid.DefaultABC, 2342)
+	if err != nil {
+		return err
+	}
+
+	id, err := sid.Generate()
+	if err != nil {
+		return err
+	}
+	return e.pairs.Create(&url.URLPair{
+		DestinationURL: req.DestinationURL,
+		ShortURL:       id,
+		Owner:          tenantID,
+	})
+}
+
+func (e *Url) List(ctx context.Context, req *url.ListRequest, rsp *url.ListResponse) error {
+	tenantID, ok := tenant.FromContext(ctx)
+	if !ok {
+		return errors.New("Not authorized")
+	}
+
+	rsp.UrlPairs = []*url.URLPair{}
+	err := e.pairs.Read(e.ownerIndex.ToQuery(e.ownerIndex.ToQuery(tenantID)), &rsp.UrlPairs)
+	if err != nil {
+		return err
+	}
+	for _, v := range rsp.UrlPairs {
+		v.ShortURL = e.hostPrefix + "/" + v.ShortURL
+	}
+	return nil
+}
+
+func (e *Url) Proxy(ctx context.Context, req *url.ProxyRequest, rsp *url.ProxyResponse) error {
+	var pair url.URLPair
+	err := e.pairs.Read(e.ownerIndex.ToQuery(model.QueryEquals("ShortURL", e.hostPrefix+"/"+req.ShortURL)), pair)
+	if err != nil {
+		return err
+	}
+
+	rsp.DestinationURL = pair.DestinationURL
+	return nil
+}

url/main.go

@@ -0,0 +1,25 @@
+package main
+
+import (
+	"github.com/micro/services/url/handler"
+	pb "github.com/micro/services/url/proto"
+
+	"github.com/micro/micro/v3/service"
+	"github.com/micro/micro/v3/service/logger"
+)
+
+func main() {
+	// Create service
+	srv := service.New(
+		service.Name("url-shortener"),
+		service.Version("latest"),
+	)
+
+	// Register handler
+	pb.RegisterUrlShortenerHandler(srv.Server(), handler.NewUrl())
+
+	// Run service
+	if err := srv.Run(); err != nil {
+		logger.Fatal(err)
+	}
+}

url/micro.mu

@@ -0,0 +1 @@
+service url-shortener

url/proto/url.pb.go

@@ -0,0 +1,555 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.26.0
+// 	protoc        v3.6.1
+// source: proto/url.proto
+
+package urlshortener
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	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 ShortenRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	DestinationURL string `protobuf:"bytes,1,opt,name=destinationURL,proto3" json:"destinationURL,omitempty"`
+}
+
+func (x *ShortenRequest) Reset() {
+	*x = ShortenRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_url_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ShortenRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ShortenRequest) ProtoMessage() {}
+
+func (x *ShortenRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_url_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 ShortenRequest.ProtoReflect.Descriptor instead.
+func (*ShortenRequest) Descriptor() ([]byte, []int) {
+	return file_proto_url_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *ShortenRequest) GetDestinationURL() string {
+	if x != nil {
+		return x.DestinationURL
+	}
+	return ""
+}
+
+type ShortenResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	ShortURL string `protobuf:"bytes,1,opt,name=shortURL,proto3" json:"shortURL,omitempty"`
+}
+
+func (x *ShortenResponse) Reset() {
+	*x = ShortenResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_url_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ShortenResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ShortenResponse) ProtoMessage() {}
+
+func (x *ShortenResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_url_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 ShortenResponse.ProtoReflect.Descriptor instead.
+func (*ShortenResponse) Descriptor() ([]byte, []int) {
+	return file_proto_url_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *ShortenResponse) GetShortURL() string {
+	if x != nil {
+		return x.ShortURL
+	}
+	return ""
+}
+
+type URLPair struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	DestinationURL string `protobuf:"bytes,1,opt,name=destinationURL,proto3" json:"destinationURL,omitempty"`
+	ShortURL       string `protobuf:"bytes,2,opt,name=shortURL,proto3" json:"shortURL,omitempty"`
+	Owner          string `protobuf:"bytes,3,opt,name=owner,proto3" json:"owner,omitempty"`
+}
+
+func (x *URLPair) Reset() {
+	*x = URLPair{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_url_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *URLPair) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*URLPair) ProtoMessage() {}
+
+func (x *URLPair) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_url_proto_msgTypes[2]
+	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 URLPair.ProtoReflect.Descriptor instead.
+func (*URLPair) Descriptor() ([]byte, []int) {
+	return file_proto_url_proto_rawDescGZIP(), []int{2}
+}
+
+func (x *URLPair) GetDestinationURL() string {
+	if x != nil {
+		return x.DestinationURL
+	}
+	return ""
+}
+
+func (x *URLPair) GetShortURL() string {
+	if x != nil {
+		return x.ShortURL
+	}
+	return ""
+}
+
+func (x *URLPair) GetOwner() string {
+	if x != nil {
+		return x.Owner
+	}
+	return ""
+}
+
+type ListRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+}
+
+func (x *ListRequest) Reset() {
+	*x = ListRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_url_proto_msgTypes[3]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ListRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ListRequest) ProtoMessage() {}
+
+func (x *ListRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_url_proto_msgTypes[3]
+	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 ListRequest.ProtoReflect.Descriptor instead.
+func (*ListRequest) Descriptor() ([]byte, []int) {
+	return file_proto_url_proto_rawDescGZIP(), []int{3}
+}
+
+type ListResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	UrlPairs []*URLPair `protobuf:"bytes,1,rep,name=urlPairs,proto3" json:"urlPairs,omitempty"`
+}
+
+func (x *ListResponse) Reset() {
+	*x = ListResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_url_proto_msgTypes[4]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ListResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ListResponse) ProtoMessage() {}
+
+func (x *ListResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_url_proto_msgTypes[4]
+	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 ListResponse.ProtoReflect.Descriptor instead.
+func (*ListResponse) Descriptor() ([]byte, []int) {
+	return file_proto_url_proto_rawDescGZIP(), []int{4}
+}
+
+func (x *ListResponse) GetUrlPairs() []*URLPair {
+	if x != nil {
+		return x.UrlPairs
+	}
+	return nil
+}
+
+type ProxyRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	ShortURL string `protobuf:"bytes,1,opt,name=shortURL,proto3" json:"shortURL,omitempty"`
+}
+
+func (x *ProxyRequest) Reset() {
+	*x = ProxyRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_url_proto_msgTypes[5]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ProxyRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ProxyRequest) ProtoMessage() {}
+
+func (x *ProxyRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_url_proto_msgTypes[5]
+	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 ProxyRequest.ProtoReflect.Descriptor instead.
+func (*ProxyRequest) Descriptor() ([]byte, []int) {
+	return file_proto_url_proto_rawDescGZIP(), []int{5}
+}
+
+func (x *ProxyRequest) GetShortURL() string {
+	if x != nil {
+		return x.ShortURL
+	}
+	return ""
+}
+
+type ProxyResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	DestinationURL string `protobuf:"bytes,1,opt,name=destinationURL,proto3" json:"destinationURL,omitempty"`
+}
+
+func (x *ProxyResponse) Reset() {
+	*x = ProxyResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_url_proto_msgTypes[6]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ProxyResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ProxyResponse) ProtoMessage() {}
+
+func (x *ProxyResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_url_proto_msgTypes[6]
+	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 ProxyResponse.ProtoReflect.Descriptor instead.
+func (*ProxyResponse) Descriptor() ([]byte, []int) {
+	return file_proto_url_proto_rawDescGZIP(), []int{6}
+}
+
+func (x *ProxyResponse) GetDestinationURL() string {
+	if x != nil {
+		return x.DestinationURL
+	}
+	return ""
+}
+
+var File_proto_url_proto protoreflect.FileDescriptor
+
+var file_proto_url_proto_rawDesc = []byte{
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+	0x73, 0x65, 0x22, 0x00, 0x42, 0x3c, 0x5a, 0x3a, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63,
+	0x6f, 0x6d, 0x2f, 0x6d, 0x69, 0x63, 0x72, 0x6f, 0x2f, 0x73, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65,
+	0x73, 0x2f, 0x75, 0x72, 0x6c, 0x2d, 0x73, 0x68, 0x6f, 0x72, 0x74, 0x65, 0x6e, 0x65, 0x72, 0x2f,
+	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x3b, 0x75, 0x72, 0x6c, 0x73, 0x68, 0x6f, 0x72, 0x74, 0x65, 0x6e,
+	0x65, 0x72, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_proto_url_proto_rawDescOnce sync.Once
+	file_proto_url_proto_rawDescData = file_proto_url_proto_rawDesc
+)
+
+func file_proto_url_proto_rawDescGZIP() []byte {
+	file_proto_url_proto_rawDescOnce.Do(func() {
+		file_proto_url_proto_rawDescData = protoimpl.X.CompressGZIP(file_proto_url_proto_rawDescData)
+	})
+	return file_proto_url_proto_rawDescData
+}
+
+var file_proto_url_proto_msgTypes = make([]protoimpl.MessageInfo, 7)
+var file_proto_url_proto_goTypes = []interface{}{
+	(*ShortenRequest)(nil),  // 0: urlshortener.ShortenRequest
+	(*ShortenResponse)(nil), // 1: urlshortener.ShortenResponse
+	(*URLPair)(nil),         // 2: urlshortener.URLPair
+	(*ListRequest)(nil),     // 3: urlshortener.ListRequest
+	(*ListResponse)(nil),    // 4: urlshortener.ListResponse
+	(*ProxyRequest)(nil),    // 5: urlshortener.ProxyRequest
+	(*ProxyResponse)(nil),   // 6: urlshortener.ProxyResponse
+}
+var file_proto_url_proto_depIdxs = []int32{
+	2, // 0: urlshortener.ListResponse.urlPairs:type_name -> urlshortener.URLPair
+	0, // 1: urlshortener.UrlShortener.Shorten:input_type -> urlshortener.ShortenRequest
+	3, // 2: urlshortener.UrlShortener.List:input_type -> urlshortener.ListRequest
+	5, // 3: urlshortener.UrlShortener.Proxy:input_type -> urlshortener.ProxyRequest
+	1, // 4: urlshortener.UrlShortener.Shorten:output_type -> urlshortener.ShortenResponse
+	4, // 5: urlshortener.UrlShortener.List:output_type -> urlshortener.ListResponse
+	6, // 6: urlshortener.UrlShortener.Proxy:output_type -> urlshortener.ProxyResponse
+	4, // [4:7] is the sub-list for method output_type
+	1, // [1:4] is the sub-list for method input_type
+	1, // [1:1] is the sub-list for extension type_name
+	1, // [1:1] is the sub-list for extension extendee
+	0, // [0:1] is the sub-list for field type_name
+}
+
+func init() { file_proto_url_proto_init() }
+func file_proto_url_proto_init() {
+	if File_proto_url_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_proto_url_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ShortenRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proto_url_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ShortenResponse); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proto_url_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*URLPair); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proto_url_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ListRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proto_url_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ListResponse); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proto_url_proto_msgTypes[5].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ProxyRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proto_url_proto_msgTypes[6].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ProxyResponse); 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_proto_url_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   7,
+			NumExtensions: 0,
+			NumServices:   1,
+		},
+		GoTypes:           file_proto_url_proto_goTypes,
+		DependencyIndexes: file_proto_url_proto_depIdxs,
+		MessageInfos:      file_proto_url_proto_msgTypes,
+	}.Build()
+	File_proto_url_proto = out.File
+	file_proto_url_proto_rawDesc = nil
+	file_proto_url_proto_goTypes = nil
+	file_proto_url_proto_depIdxs = nil
+}

url/proto/url.pb.micro.go

@@ -0,0 +1,127 @@
+// Code generated by protoc-gen-micro. DO NOT EDIT.
+// source: proto/url.proto
+
+package urlshortener
+
+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 UrlShortener service
+
+func NewUrlShortenerEndpoints() []*api.Endpoint {
+	return []*api.Endpoint{}
+}
+
+// Client API for UrlShortener service
+
+type UrlShortenerService interface {
+	Shorten(ctx context.Context, in *ShortenRequest, opts ...client.CallOption) (*ShortenResponse, error)
+	List(ctx context.Context, in *ListRequest, opts ...client.CallOption) (*ListResponse, error)
+	Proxy(ctx context.Context, in *ProxyRequest, opts ...client.CallOption) (*ProxyResponse, error)
+}
+
+type urlShortenerService struct {
+	c    client.Client
+	name string
+}
+
+func NewUrlShortenerService(name string, c client.Client) UrlShortenerService {
+	return &urlShortenerService{
+		c:    c,
+		name: name,
+	}
+}
+
+func (c *urlShortenerService) Shorten(ctx context.Context, in *ShortenRequest, opts ...client.CallOption) (*ShortenResponse, error) {
+	req := c.c.NewRequest(c.name, "UrlShortener.Shorten", in)
+	out := new(ShortenResponse)
+	err := c.c.Call(ctx, req, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *urlShortenerService) List(ctx context.Context, in *ListRequest, opts ...client.CallOption) (*ListResponse, error) {
+	req := c.c.NewRequest(c.name, "UrlShortener.List", in)
+	out := new(ListResponse)
+	err := c.c.Call(ctx, req, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *urlShortenerService) Proxy(ctx context.Context, in *ProxyRequest, opts ...client.CallOption) (*ProxyResponse, error) {
+	req := c.c.NewRequest(c.name, "UrlShortener.Proxy", in)
+	out := new(ProxyResponse)
+	err := c.c.Call(ctx, req, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// Server API for UrlShortener service
+
+type UrlShortenerHandler interface {
+	Shorten(context.Context, *ShortenRequest, *ShortenResponse) error
+	List(context.Context, *ListRequest, *ListResponse) error
+	Proxy(context.Context, *ProxyRequest, *ProxyResponse) error
+}
+
+func RegisterUrlShortenerHandler(s server.Server, hdlr UrlShortenerHandler, opts ...server.HandlerOption) error {
+	type urlShortener interface {
+		Shorten(ctx context.Context, in *ShortenRequest, out *ShortenResponse) error
+		List(ctx context.Context, in *ListRequest, out *ListResponse) error
+		Proxy(ctx context.Context, in *ProxyRequest, out *ProxyResponse) error
+	}
+	type UrlShortener struct {
+		urlShortener
+	}
+	h := &urlShortenerHandler{hdlr}
+	return s.Handle(s.NewHandler(&UrlShortener{h}, opts...))
+}
+
+type urlShortenerHandler struct {
+	UrlShortenerHandler
+}
+
+func (h *urlShortenerHandler) Shorten(ctx context.Context, in *ShortenRequest, out *ShortenResponse) error {
+	return h.UrlShortenerHandler.Shorten(ctx, in, out)
+}
+
+func (h *urlShortenerHandler) List(ctx context.Context, in *ListRequest, out *ListResponse) error {
+	return h.UrlShortenerHandler.List(ctx, in, out)
+}
+
+func (h *urlShortenerHandler) Proxy(ctx context.Context, in *ProxyRequest, out *ProxyResponse) error {
+	return h.UrlShortenerHandler.Proxy(ctx, in, out)
+}

url/proto/url.proto

@@ -0,0 +1,40 @@
+syntax = "proto3";
+
+package urlshortener;
+
+option go_package = "github.com/micro/services/url-shortener/proto;urlshortener";
+
+service UrlShortener {
+	rpc Shorten(ShortenRequest) returns (ShortenResponse) {}
+	rpc	List(ListRequest) returns (ListResponse) {}
+	rpc Proxy(ProxyRequest) returns (ProxyResponse) {}
+}
+
+message ShortenRequest {
+	string destinationURL = 1;
+}
+
+message ShortenResponse {
+	string shortURL = 1;
+}
+
+message URLPair {
+	string destinationURL = 1;
+	string shortURL = 2;
+	string owner = 3;
+}
+
+message ListRequest {
+}
+
+message ListResponse {
+	repeated URLPair urlPairs = 1;
+}
+
+message ProxyRequest {
+	string shortURL = 1;
+}
+
+message ProxyResponse {
+	string destinationURL = 1;
+}