web

Documentation

Overview

Package web provides web based micro services

Index

• Variables
• type Option
  • func Action(a func(*cli.Context)) Option
  • func Address(a string) Option
  • func Advertise(a string) Option
  • func AfterStart(fn func() error) Option
  • func AfterStop(fn func() error) Option
  • func BeforeStart(fn func() error) Option
  • func BeforeStop(fn func() error) Option
  • func Context(ctx context.Context) Option
  • func Flags(flags ...cli.Flag) Option
  • func HandleSignal(b bool) Option
  • func Handler(h http.Handler) Option
  • func Icon(ico string) Option
  • func Id(id string) Option
  • func Metadata(md map[string]string) Option
  • func MicroService(s micro.Service) Option
  • func Name(n string) Option
  • func RegisterCheck(fn func(context.Context) error) Option
  • func RegisterInterval(t time.Duration) Option
  • func RegisterTTL(t time.Duration) Option
  • func Registry(r registry.Registry) Option
  • func Secure(b bool) Option
  • func Server(srv *http.Server) Option
  • func StaticDir(d string) Option
  • func TLSConfig(t *tls.Config) Option
  • func Version(v string) Option
• type Options
• type Service
  • func NewService(opts ...Option) Service

Variables

var (
	// For serving
	DefaultName    = "go-web"
	DefaultVersion = "latest"
	DefaultId      = uuid.New().String()
	DefaultAddress = ":0"

	// for registration
	DefaultRegisterTTL      = time.Second * 90
	DefaultRegisterInterval = time.Second * 30

	// static directory
	DefaultStaticDir     = "html"
	DefaultRegisterCheck = func(context.Context) error { return nil }
)

Web basic Defaults

Types

type Option

type Option func(o *Options)

Option for web

func Action

func Action(a func(*cli.Context)) Option

Action sets the command action.

func Address

func Address(a string) Option

Address to bind to - host:port

func Advertise

func Advertise(a string) Option

Advertise The address to advertise for discovery - host:port

func AfterStart

func AfterStart(fn func() error) Option

AfterStart is executed after server start.

func AfterStop

func AfterStop(fn func() error) Option

AfterStop is executed after server stop.

func BeforeStart

func BeforeStart(fn func() error) Option

BeforeStart is executed before the server starts.

func BeforeStop

func BeforeStop(fn func() error) Option

BeforeStop is executed before the server stops.

func Context

func Context(ctx context.Context) Option

Context specifies a context for the service. Can be used to signal shutdown of the service. Can be used for extra option values.

func Flags

func Flags(flags ...cli.Flag) Option

Flags sets the command flags.

func HandleSignal

func HandleSignal(b bool) Option

HandleSignal toggles automatic installation of the signal handler that traps TERM, INT, and QUIT. Users of this feature to disable the signal handler, should control liveness of the service through the context.

func Handler

func Handler(h http.Handler) Option

Handler for custom handler

func Icon

func Icon(ico string) Option

Icon specifies an icon url to load in the UI

func Id

func Id(id string) Option

Id for Unique server id

func Metadata

func Metadata(md map[string]string) Option

Metadata associated with the service

func MicroService

func MicroService(s micro.Service) Option

MicroService sets the micro.Service used internally

func Name

func Name(n string) Option

Name of Web

func RegisterCheck

func RegisterCheck(fn func(context.Context) error) Option

RegisterCheck run func before registry service

func RegisterInterval

func RegisterInterval(t time.Duration) Option

RegisterInterval Register the service with at interval

func RegisterTTL

func RegisterTTL(t time.Duration) Option

RegisterTTL Register the service with a TTL

func Registry

func Registry(r registry.Registry) Option

Registry used for discovery

func Secure

func Secure(b bool) Option

Secure Use secure communication. If TLSConfig is not specified we use InsecureSkipVerify and generate a self signed cert

func Server

func Server(srv *http.Server) Option

Server for custom Server

func StaticDir

func StaticDir(d string) Option

StaticDir sets the static file directory. This defaults to ./html

func TLSConfig

func TLSConfig(t *tls.Config) Option

TLSConfig to be used for the transport.

func Version

func Version(v string) Option

Version of the service

type Options

type Options struct {
	Name      string
	Version   string
	Id        string
	Metadata  map[string]string
	Address   string
	Advertise string

	Action func(*cli.Context)
	Flags  []cli.Flag

	RegisterTTL      time.Duration
	RegisterInterval time.Duration

	// RegisterCheck runs a check function before registering the service
	RegisterCheck func(context.Context) error

	Server  *http.Server
	Handler http.Handler

	// Alternative Options
	Context context.Context

	Registry registry.Registry
	Service  micro.Service

	Secure      bool
	TLSConfig   *tls.Config
	BeforeStart []func() error
	BeforeStop  []func() error
	AfterStart  []func() error
	AfterStop   []func() error

	// Static directory
	StaticDir string

	Signal bool
}

Options for web

type Service

type Service interface {
	Client() *http.Client
	Init(opts ...Option) error
	Options() Options
	Handle(pattern string, handler http.Handler)
	HandleFunc(pattern string, handler func(http.ResponseWriter, *http.Request))
	Start() error
	Stop() error
	Run() error
}

Service is a web service with service discovery built in

func NewService

func NewService(opts ...Option) Service

NewService returns a new web.Service