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fix(server): env vars to change html title and favicon (#390)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,150 @@ | ||
| package app | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "context" | ||
| "fmt" | ||
| "io" | ||
| "net/http" | ||
| "os" | ||
| "path" | ||
| "regexp" | ||
| "time" | ||
|
|
||
| "github.com/spf13/afero" | ||
| ) | ||
|
|
||
| var reTitle = regexp.MustCompile("<title>(.+?)</title>") | ||
| var reFavicon = regexp.MustCompile("<link rel=\"icon\" href=\"(.+?)\"") | ||
|
|
||
| func rewriteHTML(html, title, favicon string) string { | ||
| if title != "" { | ||
| html = reTitle.ReplaceAllString(html, fmt.Sprintf("<title>%s</title>", title)) | ||
| } | ||
| if favicon != "" { | ||
| html = reFavicon.ReplaceAllString(html, fmt.Sprintf("<link rel=\"icon\" href=\"%s\"", favicon)) | ||
| } | ||
| return html | ||
| } | ||
|
|
||
| type AdapterFS struct { | ||
| FSU afero.Fs | ||
| FS afero.Fs | ||
| } | ||
|
|
||
| var _ afero.Fs = (*AdapterFS)(nil) | ||
|
|
||
| func (fs *AdapterFS) Create(name string) (afero.File, error) { | ||
| return fs.FS.Create(name) | ||
| } | ||
|
|
||
| func (fs *AdapterFS) Mkdir(name string, perm os.FileMode) error { | ||
| return fs.FS.Mkdir(name, perm) | ||
| } | ||
|
|
||
| func (fs *AdapterFS) MkdirAll(path string, perm os.FileMode) error { | ||
| return fs.FS.MkdirAll(path, perm) | ||
| } | ||
|
|
||
| func (fs *AdapterFS) Open(name string) (afero.File, error) { | ||
| if f, err := fs.FSU.Open(name); err == nil { | ||
| return f, nil | ||
| } else if !os.IsNotExist(err) { | ||
| return nil, err | ||
| } | ||
| return fs.FS.Open(name) | ||
| } | ||
|
|
||
| func (fs *AdapterFS) OpenFile(name string, flag int, perm os.FileMode) (afero.File, error) { | ||
| if f, err := fs.FSU.OpenFile(name, flag, perm); err == nil { | ||
| return f, nil | ||
| } else if !os.IsNotExist(err) { | ||
| return nil, err | ||
| } | ||
| return fs.FS.OpenFile(name, flag, perm) | ||
| } | ||
|
|
||
| func (fs *AdapterFS) Remove(name string) error { | ||
| return fs.FS.Remove(name) | ||
| } | ||
|
|
||
| func (fs *AdapterFS) RemoveAll(path string) error { | ||
| return fs.FS.RemoveAll(path) | ||
| } | ||
|
|
||
| func (fs *AdapterFS) Rename(oldname, newname string) error { | ||
| return fs.FS.Rename(oldname, newname) | ||
| } | ||
|
|
||
| func (fs *AdapterFS) Stat(name string) (os.FileInfo, error) { | ||
| if f, err := fs.FSU.Stat(name); err == nil { | ||
| return f, nil | ||
| } else if !os.IsNotExist(err) { | ||
| return nil, err | ||
| } | ||
| return fs.FS.Stat(name) | ||
| } | ||
|
|
||
| func (fs *AdapterFS) Name() string { | ||
| return "adapter" | ||
| } | ||
|
|
||
| func (fs *AdapterFS) Chmod(name string, mode os.FileMode) error { | ||
| return fs.FS.Chmod(name, mode) | ||
| } | ||
|
|
||
| func (fs *AdapterFS) Chown(name string, uid, gid int) error { | ||
| return fs.FS.Chown(name, uid, gid) | ||
| } | ||
|
|
||
| func (fs *AdapterFS) Chtimes(name string, atime time.Time, mtime time.Time) error { | ||
| return fs.FS.Chtimes(name, atime, mtime) | ||
| } | ||
|
|
||
| func NewRewriteHTMLFS(f afero.Fs, base, title, favicon string) (http.FileSystem, error) { | ||
| index, err := afero.ReadFile(f, path.Join(base, "index.html")) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| indexs := rewriteHTML(string(index), title, favicon) | ||
| mfs := afero.NewMemMapFs() | ||
| if err := afero.WriteFile(mfs, path.Join(base, "index.html"), []byte(indexs), 0666); err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| published, err := afero.ReadFile(f, path.Join(base, "published.html")) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| indexps := rewriteHTML(string(published), title, favicon) | ||
| if err := afero.WriteFile(mfs, path.Join(base, "published.html"), []byte(indexps), 0666); err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| afs := &AdapterFS{FSU: mfs, FS: f} | ||
| return afero.NewHttpFs(afs), nil | ||
| } | ||
|
|
||
| func fetchFavicon(url string) ([]byte, error) { | ||
| ctx, cancel := context.WithTimeout(context.Background(), time.Second*10) | ||
| defer cancel() | ||
| req, err := http.NewRequestWithContext(ctx, "GET", url, nil) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| res, err := http.DefaultClient.Do(req) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| if res.StatusCode != http.StatusOK { | ||
| return nil, fmt.Errorf("status code is %d", res.StatusCode) | ||
| } | ||
| defer func() { | ||
| _ = res.Body.Close() | ||
| }() | ||
| b := &bytes.Buffer{} | ||
| _, _ = io.Copy(b, res.Body) | ||
| return b.Bytes(), nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,38 @@ | ||
| package app | ||
|
|
||
| import ( | ||
| "testing" | ||
|
|
||
| "github.com/spf13/afero" | ||
| "github.com/stretchr/testify/assert" | ||
| ) | ||
|
|
||
| func TestRewriteHTML(t *testing.T) { | ||
| html := `<head><title>XXX</title><meta charset="utf8" /><link rel="icon" href="aaa" /></head>` | ||
| assert.Equal(t, `<head><title>hoge</title><meta charset="utf8" /><link rel="icon" href="favicon" /></head>`, rewriteHTML(html, "hoge", "favicon")) | ||
| } | ||
|
|
||
| func TestAdapterFS(t *testing.T) { | ||
| fs1 := afero.NewMemMapFs() | ||
| _ = afero.WriteFile(fs1, "aaaa", []byte("aaa"), 0666) | ||
| fs2 := afero.NewMemMapFs() | ||
| _ = afero.WriteFile(fs2, "aaaa", []byte("xxx"), 0666) | ||
| _ = afero.WriteFile(fs2, "bbbb", []byte("bbb"), 0666) | ||
|
|
||
| a := &AdapterFS{ | ||
| FSU: fs1, | ||
| FS: fs2, | ||
| } | ||
|
|
||
| d, err := afero.ReadFile(a, "aaaa") | ||
| assert.NoError(t, err) | ||
| assert.Equal(t, "aaa", string(d)) | ||
|
|
||
| d, err = afero.ReadFile(a, "bbbb") | ||
| assert.NoError(t, err) | ||
| assert.Equal(t, "bbb", string(d)) | ||
|
|
||
| d, err = afero.ReadFile(a, "ccc") | ||
| assert.ErrorContains(t, err, "file does not exist") | ||
| assert.Nil(t, d) | ||
| } |
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