woodpecker/server/web/web.go

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// Copyright 2018 Drone.IO Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
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package web
import (
"context"
"crypto/md5"
"fmt"
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"html/template"
"io/ioutil"
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"net/http"
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"path/filepath"
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"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.
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func New(opt ...Option) Endpoint {
opts := new(Options)
for _, f := range opt {
f(opts)
}
if opts.path != "" {
return fromPath(opts)
}
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return &website{
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fs: dist.New(),
opts: opts,
tmpl: mustCreateTemplate(
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string(dist.MustLookup("/index.html")),
),
}
}
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func fromPath(opts *Options) *website {
f := filepath.Join(opts.path, "index.html")
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b, err := ioutil.ReadFile(f)
if err != nil {
panic(err)
}
return &website{
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fs: http.Dir(opts.path),
tmpl: mustCreateTemplate(string(b)),
opts: opts,
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}
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}
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type website struct {
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opts *Options
fs http.FileSystem
tmpl *template.Template
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}
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func (w *website) Register(mux *httptreemux.ContextMux) {
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h := http.FileServer(w.fs)
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h = setupCache(h)
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mux.Handler("GET", "/favicon.png", h)
mux.Handler("GET", "/static/*filepath", h)
mux.NotFoundHandler = w.handleIndex
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}
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func (w *website) handleIndex(rw http.ResponseWriter, r *http.Request) {
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rw.WriteHeader(200)
var csrf string
var user, _ = ToUser(r.Context())
if user != nil {
csrf, _ = token.New(
token.CsrfToken,
user.Login,
).Sign(user.Hash)
}
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var syncing bool
if user != nil {
syncing = time.Unix(user.Synced, 0).Add(w.opts.sync).Before(time.Now())
}
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params := map[string]interface{}{
"user": user,
"csrf": csrf,
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"syncing": syncing,
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"version": version.Version.String(),
}
rw.Header().Set("Content-Type", "text/html; charset=UTF-8")
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w.tmpl.Execute(rw, params)
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}
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