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https://github.com/orange-cloudfoundry/gobis
Gobis is an API Gateway written in go which can be used programmatically or as a standalone server.
https://github.com/orange-cloudfoundry/gobis
api-gateway go golang middleware
Last synced: about 1 month ago
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Gobis is an API Gateway written in go which can be used programmatically or as a standalone server.
- Host: GitHub
- URL: https://github.com/orange-cloudfoundry/gobis
- Owner: orange-cloudfoundry
- License: apache-2.0
- Created: 2017-07-16T19:57:36.000Z (about 7 years ago)
- Default Branch: master
- Last Pushed: 2024-07-29T03:40:46.000Z (about 2 months ago)
- Last Synced: 2024-07-29T04:51:42.374Z (about 2 months ago)
- Topics: api-gateway, go, golang, middleware
- Language: Go
- Homepage:
- Size: 1.29 MB
- Stars: 51
- Watchers: 12
- Forks: 5
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
- starred-awesome - gobis - Gobis is a lightweight API Gateway written in go which can be used programmatically or as a standalone server. (Go)
README
# Gobis [](https://travis-ci.org/orange-cloudfoundry/gobis) [](https://godoc.org/github.com/orange-cloudfoundry/gobis)
Gobis is a lightweight API Gateway written in go which can be used programmatically or as a standalone server.
It's largely inspired by [Netflix/zuul](https://github.com/Netflix/zuul).
## Summary
* [Gobis  ](#gobis--)
* [Summary](#summary)
* [Installation](#installation)
* [Usage](#usage)
* [Headers sent by gobis to reversed app](#headers-sent-by-gobis-to-reversed-app)
* [Example using gobis as a middleware](#example-using-gobis-as-a-middleware)
* [Middlewares](#middlewares)
* [Create your middleware](#create-your-middleware)
* [Available middlewares](#available-middlewares)
* [Running a standalone server](#running-a-standalone-server)
* [Pro tips](#pro-tips)
* [FAQ](#faq)
* [Why this name ?](#why-this-name-)
## Installation
```shell
go get github/orange-cloudfoundry/gobis
```
## Usage
Gobis provide an handler to make it useable on your server.
You can found found `gobis.ProxyRoute` options in the godoc: https://godoc.org/github.com/orange-cloudfoundry/gobis#ProxyRoute
**Example**:
```go
package main
import (
"github.com/orange-cloudfoundry/gobis"
"github.com/orange-cloudfoundry/gobis-middlewares/cors"
log "github.com/sirupsen/logrus"
"net/http"
)
func main(){
builder := gobis.Builder()
routes := builder.AddRoute("/app/**", "http://www.mocky.io/v2/595625d22900008702cd71e8").
WithName("myapi").
WithMiddlewareParams(cors.CorsConfig{
Cors: &cors.CorsOptions{
AllowedOrigins: []string{"http://localhost"},
},
}).
Build()
log.SetLevel(log.DebugLevel) // set verbosity to debug for logs
gobisHandler, err := gobis.NewHandler(routes, cors.NewCors()) // we add cors middleware
if err != nil {
panic(err)
}
err = http.ListenAndServe(":8080", gobisHandler)
if err != nil {
panic(err)
}
}
```
The builder is a more convenient way to build complex and multiple route programmatically see doc [Builder](https://godoc.org/github.com/orange-cloudfoundry/gobis#Builder).
You can see doc [DefaultHandlerConfig](https://godoc.org/github.com/orange-cloudfoundry/gobis#DefaultHandlerConfig) to know more about possible parameters.
You can also see doc [ProxyRoute](https://godoc.org/github.com/orange-cloudfoundry/gobis#ProxyRoute) to see available options for routes.
### Headers sent by gobis to reversed app
Gobis will send some headers to the app when the request is forwarded:
- **X-Gobis-Forward**: This is a dummy header to say to the app that the requested was forwarded by gobis.
- **X-Gobis-Username**: User name of a logged user set by a middleware.
- **X-Gobis-Groups**: User's groups of a logged user set by a middleware.
### Example using gobis as a middleware
```go
package main
import (
"github.com/gorilla/mux"
"github.com/orange-cloudfoundry/gobis"
"github.com/orange-cloudfoundry/gobis-middlewares/cors"
"net/http"
)
func main() {
rtr := mux.NewRouter()
rtr.HandleFunc("/hello", http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
w.Write([]byte("hello world"))
}))
builder := gobis.Builder()
routes := builder.AddRoute("/app/**", "http://www.mocky.io/v2/595625d22900008702cd71e8").
WithName("myapi").
WithMiddlewareParams(cors.CorsConfig{
Cors: &cors.CorsOptions{
AllowedOrigins: []string{"http://localhost"},
},
}).
Build()
mid, err := gobis.NewGobisMiddleware(routes)
if err != nil {
panic(err)
}
err = http.ListenAndServe(":8080", mid(rtr))
if err != nil {
panic(err)
}
// hitting /hello will show hello world
// hitting /app/something will forward against gobis
}
```
## Middlewares
Gobis permit to add middlewares on handler to be able to enhance your upstream url, for example:
- add basic auth security
- add monitoring
- add cors headers
- ...
### Create your middleware
You can see example from [cors middleware](https://github.com/orange-cloudfoundry/gobis-middlewares/blob/master/cors.go).
To use it simply add it to your `RouterFactory`.
Here an example
```go
package main
import (
"github.com/orange-cloudfoundry/gobis"
log "github.com/sirupsen/logrus"
"net/http"
)
type TraceConfig struct{
EnableTrace bool `mapstructure:"enable_trace" json:"enable_trace" yaml:"enable_trace"`
}
type traceMiddleware struct {}
func (traceMiddleware) Handler(proxyRoute gobis.ProxyRoute, params interface{}, next http.Handler) (http.Handler, error) {
// Params has been decode route middleware params, this decoded agains schema you gave in schema function
traceConfig := params.(TraceConfig)
if !traceConfig.EnableTrace {
return next, nil
}
return TraceHandler(next), nil
}
// Schema function is required in order to gobis to decode params from route and sent it back to handler function through `params`
// It use https://github.com/mitchellh/mapstructure when decode to inject in handler
func (traceMiddleware) Schema() interface{} {
return TraceConfig{}
}
func TraceHandler(h http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
groups := gobis.Groups(r) // retrieve current user groups set by other middlewares with gobis.AddGroups(r, "mygroup1", "mygroup2")
user := gobis.Username(r) // retrieve current user name set by other middlewares with gobis.SetUsername(r, "username")
path := gobis.Path(r) // retrieve the path which will be passed to upstream (wihtout trailling path name on your route)
routeName := gobis.RouteName(r) // retrieve the current route name which use this handler
log.Info("Url received: "+ r.URL.String())
h.ServeHTTP(w, r)
})
}
func main(){
configHandler := gobis.DefaultHandlerConfig{
StartPath: "/gobis",
Routes: []gobis.ProxyRoute{
{
Name: "myapi",
Path: "/app/**",
Url: "http://www.mocky.io/v2/595625d22900008702cd71e8",
},
},
}
log.SetLevel(log.DebugLevel) // set verbosity to debug for logs
gobisHandler, err := gobis.NewDefaultHandler(
configHandler,
&traceMiddleware{},
)
if err != nil {
panic(err)
}
err = http.ListenAndServe(":8080", gobisHandler)
if err != nil {
panic(err)
}
}
```
## Available middlewares
Middlewares are located on repo https://github.com/orange-cloudfoundry/gobis-middlewares
## Running a standalone server
You can run a prepared gobis server with all default middlewares in one command line, see repo https://github.com/orange-cloudfoundry/gobis-server .
This server can be ran on cloud like Kubernetes, Cloud Foundry or Heroku.
## Pro tips
You can set multiple middleware params programmatically by using a dummy structure containing each config you wanna set, example:
```go
package main
import (
"github.com/orange-cloudfoundry/gobis"
"github.com/orange-cloudfoundry/gobis-middlewares/cors"
"github.com/orange-cloudfoundry/gobis-middlewares/trace"
)
func main() {
configHandler := gobis.DefaultHandlerConfig{
Routes: []gobis.ProxyRoute{
{
Name: "myapi",
Path: "/app/**",
Url: "http://www.mocky.io/v2/595625d22900008702cd71e8",
MiddlewareParams: struct {
trace.TraceConfig
cors.CorsConfig
}{
TraceConfig: trace.TraceConfig{
Trace: &trace.TraceOptions{
Enabled: true,
},
},
CorsConfig: cors.CorsConfig{
Cors: &cors.CorsOptions{
Enabled: true,
},
},
},
},
},
}
gobisHandler, err := gobis.NewDefaultHandler(configHandler, trace.NewTrace(), cors.NewCors())
}
```
## FAQ
### Why this name ?
Gobis is inspired by [zuul](https://github.com/Netflix/zuul) which also a kind of [dinosaur](https://www.wikiwand.com/en/Zuul)
which come from the family of [Ankylosauridae](https://www.wikiwand.com/en/Ankylosauridae), the [gobis(aurus)](https://www.wikiwand.com/en/Gobisaurus) come also from this family.