route

A HTTP request router.

• Uses standard http.Handlers instead of a custom type.
• Parameters, both single path segment "named" parameters and greedy "catch-all" parameters.
• Allows overlapping route registrations, that is both /user/create and /user/:name may be registered.
• Corrects trailing slashes and redirects paths with superfluous elements (e.g. ../, /./ and //).
• A custom Not Found handler can be assigned.

parameters

A named parameter has the form :name where "name" is the key used to retrieve it from the map. Named parameters only match a single path segment:

Path: /blog/:category/:post

Requests:
 /blog/go/request-routers            match: category="go", post="request-routers"
 /blog/go/request-routers/           redirect to /blog/go/request-routers
 /blog/go/                           no match
 /blog/go/request-routers/comments   no match

A catch-all parameter has the form *name where "name" is the key used to retrieve it from the map. Catch-all parameters match everything including the preceeding "/", so must always be at the end of the pattern.

Path: /files/*filepath

Requests:
 /files/                             match: filepath=""
 /files/LICENSE                      match: filepath="LICENSE"
 /files/templates/article.html       match: filepath="templates/article.html"
 /files                              match: filepath=""

Parameters can be retrieved in handlers by calling route.Vars(*http.Request) map[string]string with the current request:

import (
  "fmt"
  "net/http"

  "hawx.me/code/route"
)

func greetingHandler(w http.ResponseWriter, r *http.Request)) {
  vars := route.Vars(r)
  fmt.Fprintf(w, "Hi %s", vars["name"])
}

func main() {
  route.HandleFunc("/greet/:name", greetingHandler)
  http.ListenAndServe(":8080", route.Default)
}