Fast and flexible HTTP router for Go

BunRouter is brought to you by ⭐ uptrace/uptrace. Uptrace is an open-source APM tool that supports distributed tracing, metrics, and logs. You can use it to monitor applications and set up automatic alerts to receive notifications via email, Slack, Telegram, and others. Star it as well!

TLDR BunRouter is as fast as httprouter, but supports middlewares, routing rules priority, and error handling.

BunRouter is an extremely fast HTTP router for Go with unique combination of features:

• Middlewares allow to extract common operations from HTTP handlers into reusable functions.
• Error handling allows to further reduce the size of HTTP handlers by handling errors in middlewares.
• Routes priority enables meaningful matching priority for routing rules: first static nodes, then named nodes, lastly wildcard nodes.
• net/http compatible API which means using minimal API without constructing huge wrappers that try to do everything: from serving static files to XML generation (for example, gin.Context or echo.Context).

Router	Middlewares	Error handling	Routes priority	net/http API
BunRouter	✔️	✔️	✔️	✔️
httprouter	❌	❌	❌	✔️
Chi	✔️	❌	✔️	✔️
Echo	✔️	✔️	❌	❌
Gin	✔️	✔️	❌	❌

Learn:

• Documentation
• Reference

Examples:

• Basic example
• http.HandlerFunc example
• httprouter.Handle example
• CORS example
• Basic auth example

Projects using BunRouter:

• Distributed tracing tool
• input-output-hk/cicero
• RealWorld example application

Benchmarks:

• web-frameworks-benchmark
• go-http-routing-benchmark

Benchmark results

BenchmarkGin_Param               	16019718	        74.16 ns/op	       0 B/op	       0 allocs/op
BenchmarkHttpRouter_Param        	12560001	        95.04 ns/op	      32 B/op	       1 allocs/op
BenchmarkBunrouter_Param         	50015306	        23.81 ns/op	       0 B/op	       0 allocs/op
BenchmarkGin_Param5              	 8997234	       131.5 ns/op	       0 B/op	       0 allocs/op
BenchmarkHttpRouter_Param5       	 4809441	       261.3 ns/op	     160 B/op	       1 allocs/op
BenchmarkBunrouter_Param5        	10789635	       114.0 ns/op	       0 B/op	       0 allocs/op
BenchmarkGin_Param20             	 3953041	       302.4 ns/op	       0 B/op	       0 allocs/op
BenchmarkHttpRouter_Param20      	 1661373	       743.3 ns/op	     640 B/op	       1 allocs/op
BenchmarkBunrouter_Param20       	 2462354	       482.8 ns/op	       0 B/op	       0 allocs/op
BenchmarkGin_ParamWrite          	 9258986	       128.0 ns/op	       0 B/op	       0 allocs/op
BenchmarkHttpRouter_ParamWrite   	 9908178	       123.0 ns/op	      32 B/op	       1 allocs/op
BenchmarkBunrouter_ParamWrite    	15511226	        70.62 ns/op	       0 B/op	       0 allocs/op
BenchmarkGin_GithubStatic        	12781513	        94.17 ns/op	       0 B/op	       0 allocs/op
BenchmarkHttpRouter_GithubStatic 	30077443	        37.36 ns/op	       0 B/op	       0 allocs/op
BenchmarkBunrouter_GithubStatic  	37160334	        32.41 ns/op	       0 B/op	       0 allocs/op
BenchmarkGin_GithubParam         	 6971791	       169.2 ns/op	       0 B/op	       0 allocs/op
BenchmarkHttpRouter_GithubParam  	 5464755	       217.4 ns/op	      96 B/op	       1 allocs/op
BenchmarkBunrouter_GithubParam   	12047902	       101.2 ns/op	       0 B/op	       0 allocs/op
BenchmarkGin_GithubAll           	   32758	     37382 ns/op	       0 B/op	       0 allocs/op
BenchmarkHttpRouter_GithubAll    	   27324	     43932 ns/op	   13792 B/op	     167 allocs/op
BenchmarkBunrouter_GithubAll     	   57910	     20914 ns/op	       0 B/op	       0 allocs/op
BenchmarkGin_GPlusStatic         	17788194	        69.13 ns/op	       0 B/op	       0 allocs/op
BenchmarkHttpRouter_GPlusStatic  	60191341	        19.84 ns/op	       0 B/op	       0 allocs/op
BenchmarkBunrouter_GPlusStatic   	87114368	        14.06 ns/op	       0 B/op	       0 allocs/op
BenchmarkGin_GPlusParam          	10075399	       119.5 ns/op	       0 B/op	       0 allocs/op
BenchmarkHttpRouter_GPlusParam   	 8272046	       149.2 ns/op	      64 B/op	       1 allocs/op
BenchmarkBunrouter_GPlusParam    	37359979	        32.43 ns/op	       0 B/op	       0 allocs/op
BenchmarkGin_GPlus2Params        	 7375279	       162.9 ns/op	       0 B/op	       0 allocs/op
BenchmarkHttpRouter_GPlus2Params 	 6538942	       186.7 ns/op	      64 B/op	       1 allocs/op
BenchmarkBunrouter_GPlus2Params  	19681939	        61.51 ns/op	       0 B/op	       0 allocs/op
BenchmarkGin_GPlusAll            	  647716	      1752 ns/op	       0 B/op	       0 allocs/op
BenchmarkHttpRouter_GPlusAll     	  590356	      2085 ns/op	     640 B/op	      11 allocs/op
BenchmarkBunrouter_GPlusAll      	 1685287	       712.8 ns/op	       0 B/op	       0 allocs/op
BenchmarkGin_ParseStatic         	14566458	        76.58 ns/op	       0 B/op	       0 allocs/op
BenchmarkHttpRouter_ParseStatic  	52994076	        21.02 ns/op	       0 B/op	       0 allocs/op
BenchmarkBunrouter_ParseStatic   	50583933	        23.83 ns/op	       0 B/op	       0 allocs/op
BenchmarkGin_ParseParam          	13443874	        90.66 ns/op	       0 B/op	       0 allocs/op
BenchmarkHttpRouter_ParseParam   	 8825664	       135.6 ns/op	      64 B/op	       1 allocs/op
BenchmarkBunrouter_ParseParam    	38058278	        31.33 ns/op	       0 B/op	       0 allocs/op
BenchmarkGin_Parse2Params        	10179813	       118.1 ns/op	       0 B/op	       0 allocs/op
BenchmarkHttpRouter_Parse2Params 	 7801735	       152.9 ns/op	      64 B/op	       1 allocs/op
BenchmarkBunrouter_Parse2Params  	23704574	        50.78 ns/op	       0 B/op	       0 allocs/op
BenchmarkGin_ParseAll            	  394884	      3073 ns/op	       0 B/op	       0 allocs/op
BenchmarkHttpRouter_ParseAll     	  410238	      3011 ns/op	     640 B/op	      16 allocs/op
BenchmarkBunrouter_ParseAll      	  810908	      1487 ns/op	       0 B/op	       0 allocs/op
BenchmarkGin_StaticAll           	   50658	     23699 ns/op	       0 B/op	       0 allocs/op
BenchmarkHttpRouter_StaticAll    	  105313	     11518 ns/op	       0 B/op	       0 allocs/op
BenchmarkBunrouter_StaticAll     	   99674	     12188 ns/op	       0 B/op	       0 allocs/op

Quickstart

Install:

go get github.com/uptrace/bunrouter

Run the example:

package main

import (
	"html/template"
	"log"
	"net/http"

	"github.com/uptrace/bunrouter"
	"github.com/uptrace/bunrouter/extra/reqlog"
)

func main() {
	router := bunrouter.New(
		bunrouter.Use(reqlog.NewMiddleware()),
	)

	router.GET("/", indexHandler)

	router.WithGroup("/api", func(g *bunrouter.Group) {
		g.GET("/users/:id", debugHandler)
		g.GET("/users/current", debugHandler)
		g.GET("/users/*path", debugHandler)
	})

	log.Println("listening on http://localhost:9999")
	log.Println(http.ListenAndServe(":9999", router))
}

func indexHandler(w http.ResponseWriter, req bunrouter.Request) error {
	return indexTemplate().Execute(w, nil)
}

func debugHandler(w http.ResponseWriter, req bunrouter.Request) error {
	return bunrouter.JSON(w, bunrouter.H{
		"route":  req.Route(),
		"params": req.Params().Map(),
	})
}

var indexTmpl = `
<html>
  <h1>Welcome</h1>
  <ul>
    <li><a href="/api/users/123">/api/users/123</a></li>
    <li><a href="/api/users/current">/api/users/current</a></li>
    <li><a href="/api/users/foo/bar">/api/users/foo/bar</a></li>
  </ul>
</html>
`

func indexTemplate() *template.Template {
	return template.Must(template.New("index").Parse(indexTmpl))
}

See the Golang Router documentation for details.

See also

• Golang ORM
• Golang msgpack
• Golang message task queue
• Distributed tracing tools