Golang GoPath.HasErr方法代碼示例

func createBasicAuth(realmName string, htpasswdFile gopath.GoPath) *auth.BasicAuth {
	var secretProvider = noSecrets
	if !htpasswdFile.HasErr() && !htpasswdFile.IsEmpty() {
		secretProvider = auth.HtpasswdFileProvider(htpasswdFile.Path())
	}
	return auth.NewBasicAuthenticator(realmName, secretProvider)
}

// assertPathValidForAnyAccess sets the error flag when the path may not be
// accessed through this application in general.
// User-specific access permissions are NOT regarded here.
func (i *pathIO) assertPathValidForAnyAccess(p gopath.GoPath) {
	if p.HasErr() {
		i.syncedErrs(p)
	} else {
		i.assertFileIsNotHidden(p)
		i.assertPathInsideContentRoot(p)
	}
}

// syncedErrs couples GoPath's error handling with errStore's error handling.
// When the GoPath contained an error, it will be stored in the errStore, so
// that all following ops become no-ops.
// When however the errStore contains an error, an errorneous GoPath will be
// returned.
func (s *errStore) syncedErrs(p gopath.GoPath) gopath.GoPath {
	if s.hasErr() {
		return gopath.FromErr(s.err)
	}
	if p.HasErr() {
		s.setErr(p.Err())
	}
	return p
}

// getRelevantFileModeForPath returns the FileMode for the given file or, when
// the file does not exist, its containing directory.
func (a *accessControl) relevantFileModeForPath(p gopath.GoPath) os.FileMode {
	if a.hasErr() || p.HasErr() {
		return 0
	}
	var pStat = p.Stat()
	if !pStat.IsExists() {
		// HINT: Inspect permissions of containing directory
		pStat = p.Dir().Stat()
	}
	a.setErr(pStat.Err())
	return pStat.FileMode()
}

func (m *mimeDetector) first512BytesForPath(p gopath.GoPath) []byte {
	if p.HasErr() {
		return nil
	}

	var readCloser = m.openReaderAtPath(p)
	if m.hasErr() {
		return nil
	}
	var buf = make([]byte, 512)
	var n int
	n, m.err = readCloser.Read(buf)
	readCloser.Close()

	return buf[:n]
}

func (m *mimeDetector) mimeTypeForPath(p gopath.GoPath) string {
	p = p.EvalSymlinks()
	if p.IsDirectory() || p.HasErr() {
		return store.FallbackMimeType
	}

	var ext = p.Ext()
	if mimeType := mime.TypeByExtension(ext); mimeType != "" {
		return mimeType
	}

	var first512Bytes = m.first512BytesForPath(p)
	m.errAndClear() // clear error flag, as DetectContentType always returns something

	return http.DetectContentType(first512Bytes)
}

func (i *pathIO) assertFileIsNotHidden(p gopath.GoPath) {
	if i.hasErr() {
		return
	}
	if p.HasErr() {
		i.syncedErrs(p)
		return
	}

	if strings.HasPrefix(p.Base(), ".") {
		i.setErr(store.NewPathNotFoundError(fmt.Sprintf("%s is a hidden file and may not be displayed", p)))
	}

	// HINT: recursive call, ending at content root
	if i.isPathInsideContentRoot(p) {
		i.assertFileIsNotHidden(p.ToSlash().Dir())
	}
}

// NewFilesystemLoader creates a new instance with templates located in the
// given root path.
func NewFilesystemLoader(root gopath.GoPath) *FilesystemLoader {
	if root.HasErr() {
		panic(fmt.Sprintf("NewFilesystemLoader: root has error: %s", root.Err()))
	}
	if !root.IsExists() {
		panic(fmt.Sprintf("NewFilesystemLoader: root %s does not exist", root.Path()))
	}

	watcher, err := fsnotify.NewWatcher()
	if err != nil {
		panic(fmt.Sprintf("NewFilesystemLoader: can't open watcher: %s", err))
	}

	var loader = &FilesystemLoader{
		root,
		watcher,
		make(map[string]chan *template.Template),
		make(map[string]string)}
	go loader.processEvents()
	return loader
}

// assertPathValidForWriteAccess sets the error flag when the path may not be
// opened for writing by this process.
func (i *pathIO) assertPathValidForWriteAccess(p gopath.GoPath) {
	if i.hasErr() {
		return
	}
	if p.HasErr() {
		i.setErr(p.Err())
		return
	}

	if p.IsExists() {
		if !p.IsRegular() || !isPathWriteable(p) {
			i.setErr(store.NewAccessDeniedError(fmt.Sprintf(
				"path '%s' with mode %s denotes no regular file or no writeable directory",
				p.Path(), p.FileMode())))
		}
	} else {
		var d = p.Dir()
		if !isPathWriteable(d) {
			i.setErr(store.NewAccessDeniedError(
				"parent directory of '" + p.Path() + "' is not writeable"))
		}
	}
}

func (a *accessControl) canWriteFile(p gopath.GoPath) bool {
	if p.HasErr() || !p.IsRegular() {
		return false
	}
	return a.hasWorldWritePermission(p.FileMode())
}

func (a *accessControl) canEnterDirectory(p gopath.GoPath) bool {
	if p.HasErr() || !p.IsDirectory() {
		return false
	}
	return a.hasWorldExecutePermission(p.FileMode())
}