go-micro/examples/api

API

This repo contains examples for using the micro api.

Overview

The micro api is an API gateway which serves HTTP and routes dynamically based on service discovery.

The micro api by default serves the namespace go.micro.api. Our service names include this plus a unique name e.g go.micro.api.example. You can change the namespace via the flag --namespace=.

The micro api has a number of different handlers which lets you define what kind of API services you want. See examples below. The handler can be set via the flag --handler=. The default handler is "rpc".

Contents

• api - an rpc handler that provides the entire http headers and request
• proxy - use the api as a http reverse proxy
• rpc - make an rpc request to a go-micro app
• meta - specify which handler to use via configuration in code

Request Mapping

API/RPC

Micro maps http paths to rpc services. The mapping table can be seen below.

The default namespace for the api is go.micro.api but you can set your own namespace via --namespace.

URLs are mapped as follows:

Path	Service	Method
/foo/bar	go.micro.api.foo	Foo.Bar
/foo/bar/baz	go.micro.api.foo	Bar.Baz
/foo/bar/baz/cat	go.micro.api.foo.bar	Baz.Cat

Versioned API URLs can easily be mapped to service names:

Path	Service	Method
/foo/bar	go.micro.api.foo	Foo.Bar
/v1/foo/bar	go.micro.api.v1.foo	Foo.Bar
/v1/foo/bar/baz	go.micro.api.v1.foo	Bar.Baz
/v2/foo/bar	go.micro.api.v2.foo	Foo.Bar
/v2/foo/bar/baz	go.micro.api.v2.foo	Bar.Baz

Proxy Mapping

Starting the API with --handler=http will reverse proxy requests to backend services within the served API namespace (default: go.micro.api).

Example

Path	Service	Service Path
/greeter	go.micro.api.greeter	/greeter
/greeter/:name	go.micro.api.greeter	/greeter/:name