bear: embeddable application router

bear.Mux is an HTTP multiplexer. It uses a tree structure for fast routing, supports dynamic parameters, middleware, and accepts both native http.HandlerFunc or bear.HandlerFunc, which accepts an extra *Context argument that allows storing state (using the Get() and Set() methods) and calling the Next() middleware.

Install

go get -u github.com/ursiform/bear

Quick start

Create main.go in a new folder

package main

import (
    "fmt"
    "github.com/ursiform/bear"
    "log"
    "net/http"
)

func logRequest(res http.ResponseWriter, req *http.Request, ctx *bear.Context) {
    log.Printf("%s %s\n", req.Method, req.URL.Path)
    ctx.Next()
}
func notFound(res http.ResponseWriter, req *http.Request, ctx *bear.Context) {
    res.Header().Set("Content-Type", "text/plain")
    res.WriteHeader(http.StatusNotFound)
    res.Write([]byte("Sorry, not found!\n"))
}
func one(res http.ResponseWriter, req *http.Request, ctx *bear.Context) {
    ctx.Set("one", "set in func one").Next() // Set() allows chaining
}
func two(res http.ResponseWriter, req *http.Request, ctx *bear.Context) {
    ctx.Set("two", "set in func two").Next()
}
func three(res http.ResponseWriter, req *http.Request, ctx *bear.Context) {
    greet := fmt.Sprintf("Hello, %s!\n", ctx.Params["user"])
    first := ctx.Get("one").(string)  // assert type: interface{} as string
    second := ctx.Get("two").(string) // assert type: interface{} as string
    state := fmt.Sprintf("state one: %s\nstate two: %s\n", first, second)
    res.Header().Set("Content-Type", "text/plain")
    res.Write([]byte(greet + state))
}
func main() {
    mux := bear.New()
    mux.Always(logRequest)                          // log each incoming request
    mux.On("GET", "/hello/{user}", one, two, three) // dynamic URL param {user}
    mux.On("*", "/*", notFound)                     // wildcard method + path
    http.ListenAndServe(":1337", mux)
}

###Build and start a server

$ go build -o ./server && ./server

###Test using curl

$ curl http://localhost:1337/hello/world
Hello, world!
state one: set in func one
state two: set in func two
$ curl http://localhost:1337/hello/world/foo
Sorry, not found!

###Check server log output

2016/02/06 15:19:50 GET /hello/world
2016/02/06 15:20:00 GET /hello/world/foo

Test

go test -cover github.com/ursiform/bear

API

License

MIT License