mirror of
https://github.com/woodpecker-ci/woodpecker.git
synced 2024-12-05 08:06:30 +00:00
173 lines
5 KiB
Go
173 lines
5 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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"bytes"
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"errors"
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"fmt"
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"io"
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"io/fs"
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"net/http"
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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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"go.woodpecker-ci.org/woodpecker/v2/server"
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"go.woodpecker-ci.org/woodpecker/v2/web"
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)
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var indexHTML []byte
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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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var err error
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indexHTML, err = parseIndex()
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if err != nil {
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return nil, err
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}
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rootPath := server.Config.Server.RootPath
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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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f := &prefixFS{httpFS, rootPath}
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e.GET(rootPath+"/favicon.svg", redirect(server.Config.Server.RootPath+"/favicons/favicon-light-default.svg", http.StatusPermanentRedirect))
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e.GET(rootPath+"/favicons/*filepath", serveFile(f))
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e.GET(rootPath+"/assets/*filepath", handleCustomFilesAndAssets(f))
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e.NoRoute(handleIndex)
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return e, nil
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}
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func handleCustomFilesAndAssets(fs *prefixFS) func(ctx *gin.Context) {
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serveFileOrEmptyContent := func(w http.ResponseWriter, r *http.Request, localFileName, fileName string) {
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if len(localFileName) > 0 {
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http.ServeFile(w, r, localFileName)
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} else {
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// prefer zero content over sending a 404 Not Found
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http.ServeContent(w, r, fileName, time.Now(), bytes.NewReader([]byte{}))
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}
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}
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return func(ctx *gin.Context) {
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switch {
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case strings.HasSuffix(ctx.Request.RequestURI, "/assets/custom.js"):
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serveFileOrEmptyContent(ctx.Writer, ctx.Request, server.Config.Server.CustomJsFile, "file.js")
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case strings.HasSuffix(ctx.Request.RequestURI, "/assets/custom.css"):
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serveFileOrEmptyContent(ctx.Writer, ctx.Request, server.Config.Server.CustomCSSFile, "file.css")
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default:
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serveFile(fs)(ctx)
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}
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}
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}
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func serveFile(f *prefixFS) func(ctx *gin.Context) {
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return func(ctx *gin.Context) {
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file, err := f.Open(ctx.Request.URL.Path)
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if err != nil {
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code := http.StatusInternalServerError
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if errors.Is(err, fs.ErrNotExist) {
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code = http.StatusNotFound
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} else if errors.Is(err, fs.ErrPermission) {
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code = http.StatusForbidden
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}
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ctx.Status(code)
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return
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}
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data, err := io.ReadAll(file)
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if err != nil {
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ctx.Status(http.StatusInternalServerError)
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return
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}
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var mime string
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switch {
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case strings.HasSuffix(ctx.Request.URL.Path, ".js"):
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mime = "text/javascript"
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case strings.HasSuffix(ctx.Request.URL.Path, ".css"):
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mime = "text/css"
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case strings.HasSuffix(ctx.Request.URL.Path, ".png"):
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mime = "image/png"
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case strings.HasSuffix(ctx.Request.URL.Path, ".svg"):
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mime = "image/svg+xml"
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}
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ctx.Status(http.StatusOK)
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ctx.Writer.Header().Set("Cache-Control", "public, max-age=31536000")
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ctx.Writer.Header().Del("Expires")
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ctx.Writer.Header().Set("Content-Type", mime)
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if _, err := ctx.Writer.Write(replaceBytes(data)); err != nil {
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log.Error().Err(err).Msgf("cannot write %s", ctx.Request.URL.Path)
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}
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}
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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("Cache-Control", "no-cache")
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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("cannot write index.html")
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}
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}
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func loadFile(path string) ([]byte, error) {
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data, err := web.Lookup(path)
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if err != nil {
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return nil, err
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}
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return replaceBytes(data), nil
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}
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func replaceBytes(data []byte) []byte {
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return bytes.ReplaceAll(data, []byte("/BASE_PATH"), []byte(server.Config.Server.RootPath))
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}
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func parseIndex() ([]byte, error) {
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data, err := loadFile("index.html")
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if err != nil {
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return nil, fmt.Errorf("cannot find index.html: %w", err)
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}
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data = bytes.ReplaceAll(data, []byte("/web-config.js"), []byte(server.Config.Server.RootPath+"/web-config.js"))
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data = bytes.ReplaceAll(data, []byte("/assets/custom.css"), []byte(server.Config.Server.RootPath+"/assets/custom.css"))
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data = bytes.ReplaceAll(data, []byte("/assets/custom.js"), []byte(server.Config.Server.RootPath+"/assets/custom.js"))
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return data, nil
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}
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