Simplify web router code (#541)

cmd/server/main.go

@@ -35,10 +35,9 @@ func main() {
 	app.Usage = "woodpecker server"
 	app.Action = run
 	app.Flags = flags
-	app.Before = before
 
 	if err := app.Run(os.Args); err != nil {
-		fmt.Fprintln(os.Stderr, err)
+		_, _ = fmt.Fprintln(os.Stderr, err)
 		os.Exit(1)
 	}
 }

cmd/server/server.go

@@ -45,8 +45,8 @@ import (
 	"github.com/woodpecker-ci/woodpecker/server/remote"
 	"github.com/woodpecker-ci/woodpecker/server/router"
 	"github.com/woodpecker-ci/woodpecker/server/router/middleware"
-	"github.com/woodpecker-ci/woodpecker/server/router/middleware/logger"
 	"github.com/woodpecker-ci/woodpecker/server/store"
+	"github.com/woodpecker-ci/woodpecker/server/web"
 )
 
 func run(c *cli.Context) error {
@@ -120,7 +120,7 @@ func run(c *cli.Context) error {
 	var webUIServe func(w http.ResponseWriter, r *http.Request)
 
 	if proxyWebUI == "" {
-		webUIServe = setupTree(c).ServeHTTP
+		webUIServe = web.New().ServeHTTP
 	} else {
 		origin, _ := url.Parse(proxyWebUI)
 
@@ -138,7 +138,7 @@ func run(c *cli.Context) error {
 	// setup the server and start the listener
 	handler := router.Load(
 		webUIServe,
-		logger.Logger(time.RFC3339, true),
+		middleware.Logger(time.RFC3339, true),
 		middleware.Version,
 		middleware.Config(c),
 		middleware.Store(c, store_),

cmd/server/setup.go

@@ -20,7 +20,6 @@ import (
 	"os"
 	"time"
 
-	"github.com/gin-gonic/gin"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promauto"
 	"github.com/rs/zerolog/log"
@@ -43,7 +42,6 @@ import (
 	"github.com/woodpecker-ci/woodpecker/server/remote/gogs"
 	"github.com/woodpecker-ci/woodpecker/server/store"
 	"github.com/woodpecker-ci/woodpecker/server/store/datastore"
-	"github.com/woodpecker-ci/woodpecker/server/web"
 )
 
 func setupStore(c *cli.Context) (store.Store, error) {
@@ -303,18 +301,6 @@ func setupCoding(c *cli.Context) (remote.Remote, error) {
 	return coding.New(opts)
 }
 
-func setupTree(c *cli.Context) *gin.Engine {
-	tree := gin.New()
-	tree.UseRawPath = true
-	web.New(
-		web.WithSync(time.Hour*72),
-		web.WithDocs(c.String("docs")),
-	).Register(tree)
-	return tree
-}
-
-func before(c *cli.Context) error { return nil }
-
 func setupMetrics(g *errgroup.Group, store_ store.Store) {
 	pendingJobs := promauto.NewGauge(prometheus.GaugeOpts{
 		Namespace: "woodpecker",

server/router/middleware/logger.go

@@ -1,4 +1,4 @@
-package logger
+package middleware
 
 import (
 	"time"

server/router/router.go

@@ -29,7 +29,7 @@ import (
 )
 
 // Load loads the router
-func Load(serveHTTP func(w http.ResponseWriter, r *http.Request), middleware ...gin.HandlerFunc) http.Handler {
+func Load(noRouteHandler http.HandlerFunc, middleware ...gin.HandlerFunc) http.Handler {
 	e := gin.New()
 	e.UseRawPath = true
 	e.Use(gin.Recovery())
@@ -46,17 +46,9 @@ func Load(serveHTTP func(w http.ResponseWriter, r *http.Request), middleware ...
 	e.Use(session.SetUser())
 	e.Use(token.Refresh)
 
-	e.NoRoute(func(c *gin.Context) {
-		req := c.Request.WithContext(
-			web.WithUser(
-				c.Request.Context(),
-				session.User(c),
-			),
-		)
-		serveHTTP(c.Writer, req)
-	})
+	e.NoRoute(gin.WrapF(noRouteHandler))
 
-	e.GET("/web-config.js", web.WebConfig)
+	e.GET("/web-config.js", web.Config)
 
 	e.GET("/logout", api.GetLogout)
 	e.GET("/login", api.HandleLogin)

server/web/config.go

@@ -29,7 +29,7 @@ import (
 	"github.com/woodpecker-ci/woodpecker/version"
 )
 
-func WebConfig(c *gin.Context) {
+func Config(c *gin.Context) {
 	user := session.User(c)
 
 	var csrf string

server/web/opts.go

@@ -1,42 +0,0 @@
-// 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.
-
-package web
-
-import "time"
-
-// Options defines website handler options.
-type Options struct {
-	sync time.Duration
-	docs string
-}
-
-// Option configures the website handler.
-type Option func(*Options)
-
-// WithSync configures the website handler with the duration value
-// used to determine if the user account requires synchronization.
-func WithSync(d time.Duration) Option {
-	return func(o *Options) {
-		o.sync = d
-	}
-}
-
-// WithDocs configures the website handler with the documentation
-// website address, which should be included in the user interface.
-func WithDocs(s string) Option {
-	return func(o *Options) {
-		o.docs = s
-	}
-}

server/web/opts_test.go

@@ -1,36 +0,0 @@
-// 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.
-
-package web
-
-import (
-	"testing"
-	"time"
-)
-
-func TestWithSync(t *testing.T) {
-	opts := new(Options)
-	WithSync(time.Minute)(opts)
-	if got, want := opts.sync, time.Minute; got != want {
-		t.Errorf("Want sync duration %v, got %v", want, got)
-	}
-}
-
-func TestWithDocs(t *testing.T) {
-	opts := new(Options)
-	WithDocs("http://docs.drone.io")(opts)
-	if got, want := opts.docs, "http://docs.drone.io"; got != want {
-		t.Errorf("Want documentation url %q, got %q", want, got)
-	}
-}

server/web/web.go

@@ -15,7 +15,6 @@
 package web
 
 import (
-	"context"
 	"crypto/md5"
 	"fmt"
 	"net/http"
@@ -24,71 +23,40 @@ import (
 	"github.com/gin-gonic/gin"
 	"github.com/rs/zerolog/log"
 
-	"github.com/woodpecker-ci/woodpecker/server/model"
 	"github.com/woodpecker-ci/woodpecker/web"
 )
 
-// Endpoint provides the website endpoints.
-type Endpoint interface {
-	// Register registers the provider endpoints.
-	Register(*gin.Engine)
+// etag is an identifier for a resource version
+// it lets caches determine if resource is still the same and not send it again
+var etag = fmt.Sprintf("%x", md5.Sum([]byte(time.Now().String())))
+
+// New returns a gin engine to serve the web frontend.
+func New() *gin.Engine {
+	e := gin.New()
+
+	e.Use(setupCache)
+
+	h := http.FileServer(web.HttpFS())
+	e.GET("/favicon.svg", gin.WrapH(h))
+	e.GET("/assets/*filepath", gin.WrapH(h))
+
+	e.NoRoute(handleIndex)
+
+	return e
 }
 
-// New returns the default website endpoint.
-func New(opt ...Option) Endpoint {
-	opts := new(Options)
-	for _, f := range opt {
-		f(opts)
-	}
-
-	return &website{
-		fs:   web.HttpFS(),
-		opts: opts,
-		data: web.MustLookup("index.html"),
-	}
-}
-
-type website struct {
-	opts *Options
-	fs   http.FileSystem
-	data []byte
-}
-
-func (w *website) Register(mux *gin.Engine) {
-	h := http.FileServer(w.fs)
-	h = setupCache(h)
-	mux.GET("/favicon.svg", gin.WrapH(h))
-	mux.GET("/assets/*filepath", gin.WrapH(h))
-	mux.NoRoute(gin.WrapF(w.handleIndex))
-}
-
-func (w *website) handleIndex(rw http.ResponseWriter, r *http.Request) {
+func handleIndex(c *gin.Context) {
+	rw := c.Writer
+	data := web.MustLookup("index.html")
 	rw.Header().Set("Content-Type", "text/html; charset=UTF-8")
 	rw.WriteHeader(200)
-	if _, err := rw.Write(w.data); err != nil {
+	if _, err := rw.Write(data); err != nil {
 		log.Error().Err(err).Msg("can not write index.html")
 	}
 }
 
-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)
-		},
-	)
+func setupCache(c *gin.Context) {
+	c.Writer.Header().Set("Cache-Control", "public, max-age=31536000")
+	c.Writer.Header().Del("Expires")
+	c.Writer.Header().Set("ETag", etag)
 }
-
-// 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)
-}
-
-type key int
-
-const userKey key = 0