cmd/searchix-web/generate-error-page.go (view raw)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 | package main
import (
"io"
"os"
"strings"
"github.com/Southclaws/fault"
"github.com/Southclaws/fault/fmsg"
"alin.ovh/searchix/frontend"
"alin.ovh/searchix/internal/components"
"alin.ovh/searchix/internal/config"
"alin.ovh/searchix/internal/file"
)
const perm = 0o644
type GenerateErrorPageOptions struct {
Outdir string `long:"outdir" description:"output directory"`
}
func (opts *GenerateErrorPageOptions) Execute(_ []string) error {
assets, err := frontend.New()
if err != nil {
return fault.Wrap(err, fmsg.With("could not create frontend"))
}
root, err := file.CreateAndOpenRoot(opts.Outdir)
if err != nil {
return fault.Wrap(err, fmsg.With("could not open root directory"))
}
defer root.Close()
err = writeErrorPageTemplate(root, assets)
if err != nil {
return err
}
err = root.Mkdir("assets", 0o755)
if err != nil {
return fault.Wrap(err, fmsg.With("could not create assets directory"))
}
for _, asset := range assets.ByPath {
if err := writeFile(root, asset); err != nil {
return err
}
}
return nil
}
func writeErrorPageTemplate(root *file.Root, assets *frontend.AssetCollection) error {
out, err := root.OpenFile("error.html", os.O_CREATE|os.O_WRONLY, perm)
if err != nil {
return fault.Wrap(err, fmsg.With("could not open error.html"))
}
defer out.Close()
err = components.ErrorTemplate(components.TemplateData{
Source: config.Source{
Importer: config.All,
},
Sources: []config.Source{},
Query: "",
ExtraHeadHTML: "",
Code: 0,
Message: `{{placeholder "http.error.status_code"}} {{placeholder "http.error.status_text"}}`,
Assets: assets,
}).Render(out)
if err != nil {
return fault.Wrap(err, fmsg.With("could not render error template"))
}
err = out.Sync()
if err != nil {
return fault.Wrap(err, fmsg.With("could not sync error.html"))
}
return nil
}
func writeFile(root *file.Root, asset *frontend.Asset) error {
outname := strings.TrimPrefix(asset.ImmutablePath, "/")
in, err := frontend.Files.Open(asset.Filename)
if err != nil {
return fault.Wrap(err, fmsg.With("could not open asset file"))
}
defer in.Close()
out, err := root.OpenFile(outname, os.O_CREATE|os.O_WRONLY, perm)
if err != nil {
return fault.Wrap(err, fmsg.With("could not open output file"))
}
defer out.Close()
_, err = io.Copy(out, in)
if err != nil {
return fault.Wrap(err, fmsg.With("could not write asset file"))
}
err = out.Sync()
if err != nil {
return fault.Wrap(err, fmsg.With("could not sync asset file"))
}
return nil
}
func init() {
var opts GenerateErrorPageOptions
_, err := parser.AddCommand(
"generate-error-page",
"generate error page template",
"generate error page template for use with a reverse proxy",
&opts,
)
if err != nil {
panic(err)
}
}
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