.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.0.0-20201105173854-bc9fc8d8c4bc/godoc/page.go

   1 // Copyright 2009 The Go Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style
   3 // license that can be found in the LICENSE file.
   4
   5 package godoc
   6
   7 import (
   8         "net/http"
   9         "os"
  10         "path/filepath"
  11         "runtime"
  12         "strings"
  13
  14         "golang.org/x/tools/godoc/golangorgenv"
  15 )
  16
  17 // Page describes the contents of the top-level godoc webpage.
  18 type Page struct {
  19         Title    string
  20         Tabtitle string
  21         Subtitle string
  22         SrcPath  string
  23         Query    string
  24         Body     []byte
  25         GoogleCN bool // page is being served from golang.google.cn
  26         TreeView bool // page needs to contain treeview related js and css
  27
  28         // filled in by ServePage
  29         SearchBox       bool
  30         Playground      bool
  31         Version         string
  32         GoogleAnalytics string
  33 }
  34
  35 func (p *Presentation) ServePage(w http.ResponseWriter, page Page) {
  36         if page.Tabtitle == "" {
  37                 page.Tabtitle = page.Title
  38         }
  39         page.SearchBox = p.Corpus.IndexEnabled
  40         page.Playground = p.ShowPlayground
  41         page.Version = runtime.Version()
  42         page.GoogleAnalytics = p.GoogleAnalytics
  43         applyTemplateToResponseWriter(w, p.GodocHTML, page)
  44 }
  45
  46 func (p *Presentation) ServeError(w http.ResponseWriter, r *http.Request, relpath string, err error) {
  47         w.WriteHeader(http.StatusNotFound)
  48         if perr, ok := err.(*os.PathError); ok {
  49                 rel, err := filepath.Rel(runtime.GOROOT(), perr.Path)
  50                 if err != nil {
  51                         perr.Path = "REDACTED"
  52                 } else {
  53                         perr.Path = filepath.Join("$GOROOT", rel)
  54                 }
  55         }
  56         p.ServePage(w, Page{
  57                 Title:           "File " + relpath,
  58                 Subtitle:        relpath,
  59                 Body:            applyTemplate(p.ErrorHTML, "errorHTML", err),
  60                 GoogleCN:        googleCN(r),
  61                 GoogleAnalytics: p.GoogleAnalytics,
  62         })
  63 }
  64
  65 // googleCN reports whether request r is considered
  66 // to be served from golang.google.cn.
  67 func googleCN(r *http.Request) bool {
  68         if r.FormValue("googlecn") != "" {
  69                 return true
  70         }
  71         if strings.HasSuffix(r.Host, ".cn") {
  72                 return true
  73         }
  74         if !golangorgenv.CheckCountry() {
  75                 return false
  76         }
  77         switch r.Header.Get("X-Appengine-Country") {
  78         case "", "ZZ", "CN":
  79                 return true
  80         }
  81         return false
  82 }