/
helpers.go
74 lines (66 loc) · 1.53 KB
/
helpers.go
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// Copyright 2015 Diffeo, Inc.
// This software is released under an MIT/X11 open source license.
package restserver
// This file contains various HTTP-related helpers. I sort of suspect
// most of them belong in some sort of standard library I haven't
// immediately found.
import (
"fmt"
"github.com/diffeo/go-coordinate/restdata"
"github.com/gorilla/mux"
"net/url"
"strings"
)
type urlBuilder struct {
Router *mux.Router
Params []string
Error error
}
func buildURLs(router *mux.Router, params ...string) *urlBuilder {
// Encode all of the values in params
for i, value := range params {
if i%2 == 1 {
params[i] = restdata.MaybeEncodeName(value)
}
}
return &urlBuilder{Router: router, Params: params}
}
func (u *urlBuilder) Route(route string) *mux.Route {
if u.Error != nil {
return nil
}
r := u.Router.Get(route)
if r == nil {
u.Error = fmt.Errorf("No such route %q", route)
}
return r
}
func (u *urlBuilder) URL(out *string, route string) *urlBuilder {
var r *mux.Route
var url *url.URL
if u.Error == nil {
r = u.Route(route)
}
if u.Error == nil {
url, u.Error = r.URL(u.Params...)
}
if u.Error == nil {
*out = url.String()
}
return u
}
func (u *urlBuilder) Template(out *string, route, param string) *urlBuilder {
var r *mux.Route
var url *url.URL
if u.Error == nil {
r = u.Route(route)
}
if u.Error == nil {
params := append([]string{param, "---"}, u.Params...)
url, u.Error = r.URL(params...)
}
if u.Error == nil {
*out = strings.Replace(url.String(), "---", "{"+param+"}", 1)
}
return u
}