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woodpecker/server/web/web.go
2017-09-12 09:03:32 -07:00

113 lines
2.4 KiB
Go

package web
import (
"context"
"crypto/md5"
"fmt"
"html/template"
"io/ioutil"
"net/http"
"path/filepath"
"time"
"github.com/drone/drone-ui/dist"
"github.com/drone/drone/model"
"github.com/drone/drone/shared/token"
"github.com/drone/drone/version"
"github.com/dimfeld/httptreemux"
)
// Endpoint provides the website endpoints.
type Endpoint interface {
// Register registers the provider endpoints.
Register(*httptreemux.ContextMux)
}
// New returns the default website endpoint.
func New() Endpoint {
return &website{
fs: dist.New(),
templ: mustCreateTemplate(
string(dist.MustLookup("/index.html")),
),
}
}
// FromPath returns the website endpoint that
// serves the webpage form disk at path p.
func FromPath(p string) Endpoint {
f := filepath.Join(p, "index.html")
b, err := ioutil.ReadFile(f)
if err != nil {
panic(err)
}
return &website{
fs: http.Dir(p),
templ: mustCreateTemplate(string(b)),
}
}
type website struct {
fs http.FileSystem
templ *template.Template
}
func (w *website) Register(mux *httptreemux.ContextMux) {
h := http.FileServer(w.fs)
h = setupCache(h)
mux.Handler("GET", "/favicon.png", h)
mux.Handler("GET", "/static/*filepath", h)
mux.NotFoundHandler = w.handleIndex
}
func (w *website) handleIndex(rw http.ResponseWriter, r *http.Request) {
rw.WriteHeader(200)
var csrf string
var user, _ = ToUser(r.Context())
if user != nil {
csrf, _ = token.New(
token.CsrfToken,
user.Login,
).Sign(user.Hash)
}
params := map[string]interface{}{
"user": user,
"csrf": csrf,
"version": version.Version.String(),
}
rw.Header().Set("Content-Type", "text/html; charset=UTF-8")
w.templ.Execute(rw, params)
}
func setupCache(h http.Handler) http.Handler {
data := []byte(time.Now().String())
etag := fmt.Sprintf("%x", md5.Sum(data))
return http.HandlerFunc(
func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Cache-Control", "public, max-age=31536000")
w.Header().Del("Expires")
w.Header().Set("ETag", etag)
h.ServeHTTP(w, r)
},
)
}
// WithUser returns a context with the current authenticated user.
func WithUser(c context.Context, user *model.User) context.Context {
return context.WithValue(c, userKey, user)
}
// ToUser returns a user from the context.
func ToUser(c context.Context) (*model.User, bool) {
user, ok := c.Value(userKey).(*model.User)
return user, ok
}
type key int
const userKey key = 0