[milo] Refactor all html knowledge out of backends.

milo/common/middleware.go

Index: milo/common/middleware.go
diff --git a/milo/common/middleware.go b/milo/common/middleware.go
deleted file mode 100644
index 9a80a43394e4afd7c3a064071a33b4e7649e7ffd..0000000000000000000000000000000000000000
--- a/milo/common/middleware.go
+++ /dev/null
@@ -1,113 +0,0 @@
-// Copyright 2015 The LUCI Authors.
-//
-// 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 common
-
-import (
-	"net/http"
-	"strings"
-
-	"golang.org/x/net/context"
-
-	"github.com/luci/gae/impl/cloud"
-	"github.com/luci/gae/service/info"
-	"github.com/luci/luci-go/appengine/gaeauth/server"
-	"github.com/luci/luci-go/appengine/gaemiddleware"
-	"github.com/luci/luci-go/common/clock"
-	"github.com/luci/luci-go/server/analytics"
-	"github.com/luci/luci-go/server/auth"
-	"github.com/luci/luci-go/server/auth/identity"
-	"github.com/luci/luci-go/server/router"
-	"github.com/luci/luci-go/server/templates"
-)
-
-var authconfig *auth.Config
-
-// GetTemplateBundles is used to render HTML templates. It provides base args
-// passed to all templates.  It takes a path to the template folder, relative
-// to the path of the binary during runtime.
-func GetTemplateBundle(templatePath string) *templates.Bundle {
-	return &templates.Bundle{
-		Loader:          templates.FileSystemLoader(templatePath),
-		DebugMode:       info.IsDevAppServer,
-		DefaultTemplate: "base",
-		DefaultArgs: func(c context.Context) (templates.Args, error) {
-			r := getRequest(c)
-			path := r.URL.Path
-			loginURL, err := auth.LoginURL(c, path)
-			if err != nil {
-				return nil, err
-			}
-			logoutURL, err := auth.LogoutURL(c, path)
-			if err != nil {
-				return nil, err
-			}
-			return templates.Args{
-				"AppVersion":  strings.Split(info.VersionID(c), ".")[0],
-				"IsAnonymous": auth.CurrentIdentity(c) == identity.AnonymousIdentity,
-				"User":        auth.CurrentUser(c),
-				"LoginURL":    loginURL,
-				"LogoutURL":   logoutURL,
-				"CurrentTime": clock.Now(c),
-				"Analytics":   analytics.Snippet(c),
-				"RequestID":   info.RequestID(c),
-				"Request":     r,
-			}, nil
-		},
-		FuncMap: funcMap,
-	}
-}
-
-// Base returns the basic LUCI appengine middlewares.
-func Base(templatePath string) router.MiddlewareChain {
-	return gaemiddleware.BaseProd().Extend(
-		auth.Authenticate(server.CookieAuth),
-		withRequestMiddleware,
-		templates.WithTemplates(GetTemplateBundle(templatePath)),
-	)
-}
-
-// FlexBase returns the basic middleware for use on appengine flex.  Flex does not
-// allow the use of appengine APIs.
-func FlexBase() router.MiddlewareChain {
-	// Installs the Info and Datastore services.
-	return router.NewMiddlewareChain(func(c *router.Context, next router.Handler) {
-		c.Context = cloud.UseFlex(c.Context)
-		next(c)
-	})
-}
-
-// The context key, so that we can embed the http.Request object into
-// the context.
-var requestKey = "http.request"
-
-// WithRequest returns a context with the http.Request object
-// in it.
-func WithRequest(c context.Context, r *http.Request) context.Context {
-	return context.WithValue(c, &requestKey, r)
-}
-
-// withRequestMiddleware is a middleware that installs a request into the context.
-// This is used for various things in the default template.
-func withRequestMiddleware(c *router.Context, next router.Handler) {
-	c.Context = WithRequest(c.Context, c.Request)
-	next(c)
-}
-
-func getRequest(c context.Context) *http.Request {
-	if req, ok := c.Value(&requestKey).(*http.Request); ok {
-		return req
-	}
-	panic("No http.request found in context")
-}