mirror of
https://github.com/woodpecker-ci/woodpecker.git
synced 2024-11-14 14:01:26 +00:00
109 lines
2.8 KiB
Go
109 lines
2.8 KiB
Go
// Copyright 2018 Drone.IO Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain 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,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package web
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import (
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"crypto/md5"
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"fmt"
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"net/http"
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"net/url"
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"regexp"
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"strings"
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"time"
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"github.com/gin-gonic/gin"
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"github.com/rs/zerolog/log"
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"github.com/woodpecker-ci/woodpecker/server"
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"github.com/woodpecker-ci/woodpecker/web"
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)
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// etag is an identifier for a resource version
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// it lets caches determine if resource is still the same and not send it again
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var (
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etag = fmt.Sprintf("%x", md5.Sum([]byte(time.Now().String())))
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indexHTML []byte
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)
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type prefixFS struct {
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fs http.FileSystem
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prefix string
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}
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func (f *prefixFS) Open(name string) (http.File, error) {
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return f.fs.Open(strings.TrimPrefix(name, f.prefix))
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}
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// New returns a gin engine to serve the web frontend.
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func New() (*gin.Engine, error) {
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e := gin.New()
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indexHTML = parseIndex()
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e.Use(setupCache)
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rootURL, _ := url.Parse(server.Config.Server.RootURL)
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rootPath := rootURL.Path
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httpFS, err := web.HTTPFS()
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if err != nil {
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return nil, err
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}
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h := http.FileServer(&prefixFS{httpFS, rootPath})
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e.GET(rootPath+"/favicon.svg", redirect(server.Config.Server.RootURL+"/favicons/favicon-light-default.svg", http.StatusPermanentRedirect))
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e.GET(rootPath+"/favicons/*filepath", gin.WrapH(h))
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e.GET(rootPath+"/assets/*filepath", gin.WrapH(h))
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e.NoRoute(handleIndex)
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return e, nil
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}
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// redirect return gin helper to redirect a request
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func redirect(location string, status ...int) func(ctx *gin.Context) {
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return func(ctx *gin.Context) {
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code := http.StatusFound
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if len(status) == 1 {
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code = status[0]
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}
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http.Redirect(ctx.Writer, ctx.Request, location, code)
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}
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}
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func handleIndex(c *gin.Context) {
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rw := c.Writer
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rw.Header().Set("Content-Type", "text/html; charset=UTF-8")
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rw.WriteHeader(http.StatusOK)
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if _, err := rw.Write(indexHTML); err != nil {
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log.Error().Err(err).Msg("can not write index.html")
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}
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}
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func parseIndex() []byte {
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data, err := web.Lookup("index.html")
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if err != nil {
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log.Fatal().Err(err).Msg("can not find index.html")
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}
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if server.Config.Server.RootURL == "" {
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return data
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}
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return regexp.MustCompile(`/\S+\.(js|css|png|svg)`).ReplaceAll(data, []byte(server.Config.Server.RootURL+"$0"))
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}
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func setupCache(c *gin.Context) {
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c.Writer.Header().Set("Cache-Control", "public, max-age=31536000")
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c.Writer.Header().Del("Expires")
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c.Writer.Header().Set("ETag", etag)
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}
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