| // Copyright 2013 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| //go:build go1.16 |
| // +build go1.16 |
| |
| package godoc |
| |
| import ( |
| "io/fs" |
| "net/http" |
| "text/template" |
| |
| "golang.org/x/website/internal/api" |
| "golang.org/x/website/internal/pkgdoc" |
| ) |
| |
| // Presentation generates output from a file system. |
| type Presentation struct { |
| fs fs.FS |
| api api.DB |
| |
| mux *http.ServeMux |
| fileServer http.Handler |
| |
| DirlistHTML, |
| ErrorHTML, |
| ExampleHTML, |
| GodocHTML, |
| PackageHTML, |
| PackageRootHTML *template.Template |
| |
| // GoogleCN reports whether this request should be marked GoogleCN. |
| // If the function is nil, no requests are marked GoogleCN. |
| GoogleCN func(*http.Request) bool |
| |
| // GoogleAnalytics optionally adds Google Analytics via the provided |
| // tracking ID to each page. |
| GoogleAnalytics string |
| |
| DocFuncs template.FuncMap |
| SiteFuncs template.FuncMap |
| } |
| |
| // NewPresentation returns a new Presentation from a file system. |
| func NewPresentation(fsys fs.FS) (*Presentation, error) { |
| apiDB, err := api.Load(fsys) |
| if err != nil { |
| return nil, err |
| } |
| p := &Presentation{ |
| fs: fsys, |
| api: apiDB, |
| mux: http.NewServeMux(), |
| fileServer: http.FileServer(http.FS(fsys)), |
| } |
| docs := &docServer{ |
| p: p, |
| d: pkgdoc.NewDocs(fsys), |
| } |
| p.mux.Handle("/cmd/", docs) |
| p.mux.Handle("/pkg/", docs) |
| p.mux.HandleFunc("/", p.ServeFile) |
| p.initFuncMap() |
| |
| if p.DirlistHTML, err = p.ReadTemplate("dirlist.html"); err != nil { |
| return nil, err |
| } |
| if p.ErrorHTML, err = p.ReadTemplate("error.html"); err != nil { |
| return nil, err |
| } |
| if p.ExampleHTML, err = p.ReadTemplate("example.html"); err != nil { |
| return nil, err |
| } |
| if p.GodocHTML, err = p.ReadTemplate("godoc.html"); err != nil { |
| return nil, err |
| } |
| if p.PackageHTML, err = p.ReadTemplate("package.html"); err != nil { |
| return nil, err |
| } |
| if p.PackageRootHTML, err = p.ReadTemplate("packageroot.html"); err != nil { |
| return nil, err |
| } |
| |
| return p, nil |
| } |
| |
| func (p *Presentation) ServeHTTP(w http.ResponseWriter, r *http.Request) { |
| p.mux.ServeHTTP(w, r) |
| } |
| |
| func (p *Presentation) googleCN(r *http.Request) bool { |
| return p.GoogleCN != nil && p.GoogleCN(r) |
| } |
| |
| func (p *Presentation) ReadTemplate(name string) (*template.Template, error) { |
| data, err := fs.ReadFile(p.fs, "lib/godoc/"+name) |
| if err != nil { |
| return nil, err |
| } |
| t, err := template.New(name).Funcs(p.SiteFuncs).Parse(string(data)) |
| if err != nil { |
| return nil, err |
| } |
| return t, nil |
| } |