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534ece064b
* pkg/web: closure-style middlewares Switches the middleware execution model from web.Handlers in a slice to web.Middleware. Middlewares are temporarily kept in a slice to preserve ordering, but prior to execution they are applied, forming a giant call-stack, giving granular control over the execution flow. * pkg/middleware: adapt to web.Middleware * pkg/middleware/recovery: use c.Req over req c.Req gets updated by future handlers, while req stays static. The current recovery implementation needs this newer information * pkg/web: correct middleware ordering * pkg/webtest: adapt middleware * pkg/web/hack: set w and r onto web.Context By adopting std middlewares, it may happen they invoke next(w,r) without putting their modified w,r into the web.Context, leading old-style handlers to operate on outdated fields. pkg/web now takes care of this * pkg/middleware: selectively use future context * pkg/web: accept closure-style on Use() * webtest: Middleware testing adds a utility function to web/webtest to obtain a http.ResponseWriter, http.Request and http.Handler the same as a middleware that runs would receive * *: cleanup * pkg/web: don't wrap Middleware from Router * pkg/web: require chain to write response * *: remove temp files * webtest: don't require chain write * *: cleanup
73 lines
2.2 KiB
Go
73 lines
2.2 KiB
Go
// Copyright 2013 Martini Authors
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// Copyright 2014 The Macaron Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License"): you may
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// not use this file except in compliance with the License. You may obtain
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// a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations
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// under the License.
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package web
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import (
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"html/template"
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"io/fs"
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"net/http"
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"os"
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"path/filepath"
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)
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// Renderer is a Middleware that injects a template renderer into the macaron context, enabling ctx.HTML calls in the handlers.
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// If MACARON_ENV is set to "development" then templates will be recompiled on every request. For more performance, set the
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// MACARON_ENV environment variable to "production".
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func Renderer(dir, leftDelim, rightDelim string) Middleware {
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fs := os.DirFS(dir)
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t, err := compileTemplates(fs, leftDelim, rightDelim)
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if err != nil {
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panic("Renderer: " + err.Error())
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}
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return func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
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ctx := FromContext(req.Context())
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if Env == DEV {
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if t, err = compileTemplates(fs, leftDelim, rightDelim); err != nil {
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panic("Context.HTML:" + err.Error())
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}
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}
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ctx.template = t
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next.ServeHTTP(rw, req)
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})
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}
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}
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func compileTemplates(filesystem fs.FS, leftDelim, rightDelim string) (*template.Template, error) {
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t := template.New("")
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t.Delims(leftDelim, rightDelim)
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err := fs.WalkDir(filesystem, ".", func(path string, d fs.DirEntry, e error) error {
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if e != nil {
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return nil // skip unreadable or erroneous filesystem items
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}
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if d.IsDir() {
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return nil
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}
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ext := filepath.Ext(path)
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if ext != ".html" && ext != ".tmpl" {
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return nil
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}
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data, err := fs.ReadFile(filesystem, path)
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if err != nil {
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return err
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}
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basename := path[:len(path)-len(ext)]
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_, err = t.New(basename).Parse(string(data))
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return err
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})
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return t, err
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}
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