routes.go

a simple http routing API for the Go programming language

go get github.com/bradrydzewski/routes

this project combines the best of web.go and pat.go. It uses pat.go's named url parameters (ie :param) and web.go's regular expression groups for url matching and parameter extraction, which provides significant performance improvements.

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

Getting Started

package main

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

func Whoami(w http.ResponseWriter, r *http.Request) {
    params := r.URL.Query()
    lastName := params.Get(":last")
    firstName := params.Get(":first")
    fmt.Fprintf(w, "you are %s %s", firstName, lastName)
}

func main() {
    mux := routes.New()
    mux.Get("/:last/:first", Whoami)

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

Route Examples

You can create routes for all http methods:

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

You can specify custom regular expressions for routes:

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

You can also create routes for static files:

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

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

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)
}

Security

You can restrict access to routes by assigning an AuthHandler to a route.

Here is an example using a custom AuthHandler per route. Image we are doing some type of Basic authentication:

func authHandler(w http.ResponseWriter, r *http.Request) bool {
    user := r.URL.User.Username()
    password := r.URL.User.Password()
    if user != "xxx" && password != "xxx" {
        // if we wanted, we could do an http.Redirect here
	    return false
    }
    return true
}

mux.Get("/:param", handler).SecureFunc(authHandler)

If you plan to use the same AuthHandler to secure all of your routes, you may want to set the DefaultAuthHandler:

routes.DefaulAuthHandler = authHandler
mux.Get("/:param", handler).Secure()
mux.Get("/:param", handler).Secure()

OAuth2

In the above examples, we implemented our own custom AuthHandler. Check out the auth.go API which provides custom AuthHandlers for OAuth2 providers such as Google and Github.

Logging

Logging is enabled by default, but can be disabled:

mux.Logging = false

You can also specify your logger:

mux.Logger = log.New(os.Stdout, "", 0)