routes

routes.go

a simple http routing API for the Go programming language

go get github.com/drone/routes

for more information see: http://gopkgdoc.appspot.com/pkg/github.com/drone/routes

Getting Started

package main

import (
    "fmt"
    "github.com/drone/routes"
    "net/http"
)

func foobar (w http.ResponseWriter, r *http.Request) {
	c := routes.NewContext(r)
	foo := c.Params.Get(":foo")
	bar := c.Params.Get(":bar")
	fmt.Fprintf(w, "%s %s", foo, bar)
}

func main() {
    r := routes.NewRouter()
    r.Get("/:bar/:foo", foobar)

    http.Handle("/", r)
    http.ListenAndServe(":8088", nil)
}

Route Examples

You can create routes for all http methods:

r.Get("/:param", handler)
r.Put("/:param", handler)
r.Post("/:param", handler)
r.Patch("/:param", handler)
r.Del("/:param", handler)

You can specify custom regular expressions for routes:

r.Get("/files/:param(.+)", handler)

You can also create routes for static files:

pwd, _ := os.Getwd()
r.Static("/static", pwd)

this will serve any files in /static, including files in subdirectories. For example /static/logo.gif or /static/style/main.css.

Filters / Middleware

You can implement route filters to do things like enforce security, set session variables, etc

You can, for example, filter all request to enforce some type of security:

r.Filter(func(rw http.ResponseWriter, r *http.Request) {
	if r.URL.User != "admin" {
		http.Error(w, "", http.StatusForbidden)
	}
})

You can also apply filters only when certain REST URL Parameters exist:

r.Get("/:id", handler)
r.Filter("id", func(rw http.ResponseWriter, r *http.Request) {
	c := routes.NewContext(r)
	id := c.Params.Get("id")

	// verify the user has access to the specified resource id
	user := r.URL.User.Username()
    if HasAccess(user, id) == false {
		http.Error(w, "", http.StatusForbidden)
	}
})

Helper Functions

You can use helper functions for serializing to Json and Xml. I found myself constantly writing code to serialize, set content type, content length, etc. Feel free to use these functions to eliminate redundant code in your app.

Helper function for serving Json, sets content type to application/json:

func handler(w http.ResponseWriter, r *http.Request) {
	mystruct := { ... }
    routes.ServeJson(w, &mystruct)
}

Helper function for serving Xml, sets content type to application/xml:

func handler(w http.ResponseWriter, r *http.Request) {
	mystruct := { ... }
    routes.ServeXml(w, &mystruct)
}

Helper function to serve Xml OR Json, depending on the value of the Accept header:

func handler(w http.ResponseWriter, r *http.Request) {
	mystruct := { ... }
    routes.ServeFormatted(w, r, &mystruct)
}