Method CELLibrary

modules/caddyhttp/fileserver/matcher.go:174–223

CELLibrary produces options that expose this matcher for use in CEL expression matchers. Example: expression file() expression file({http.request.uri.path}, '/index.php') expression file({'root': '/srv', 'try_files': [{http.request.uri.path}, '/index.php'], 'try_policy': 'first_exist', 'split_p

(ctx caddy.Context)

//	expression file({http.request.uri.path}, '/index.php')
//	expression file({'root': '/srv', 'try_files': [{http.request.uri.path}, '/index.php'], 'try_policy': 'first_exist', 'split_path': ['.php']})
func (MatchFile) CELLibrary(ctx caddy.Context) (cel.Library, error) {
	requestType := cel.ObjectType("http.Request")

	matcherFactory := func(data ref.Val) (caddyhttp.RequestMatcherWithError, error) {
		values, err := caddyhttp.CELValueToMapStrList(data)
		if err != nil {
			return nil, err
		}

		var root string
		if len(values["root"]) > 0 {
			root = values["root"][0]
		}

		var fsName string
		if len(values["fs"]) > 0 {
			fsName = values["fs"][0]
		}

		var try_policy string
		if len(values["try_policy"]) > 0 {
			try_policy = values["try_policy"][0]
		}

		m := MatchFile{
			Root:       root,
			TryFiles:   values["try_files"],
			TryPolicy:  try_policy,
			SplitPath:  values["split_path"],
			FileSystem: fsName,
		}

		err = m.Provision(ctx)
		return m, err
	}

	envOptions := []cel.EnvOption{
		cel.Macros(parser.NewGlobalVarArgMacro("file", celFileMatcherMacroExpander())),
		cel.Function("file", cel.Overload("file_request_map", []*cel.Type{requestType, caddyhttp.CELTypeJSON}, cel.BoolType)),
		cel.Function("file_request_map",
			cel.Overload("file_request_map", []*cel.Type{requestType, caddyhttp.CELTypeJSON}, cel.BoolType),
			cel.SingletonBinaryBinding(caddyhttp.CELMatcherRuntimeFunction("file_request_map", matcherFactory))),
	}

	programOptions := []cel.ProgramOption{
		cel.CustomDecorator(caddyhttp.CELMatcherDecorator("file_request_map", matcherFactory)),
	}

	return caddyhttp.NewMatcherCELLibrary(envOptions, programOptions), nil
}

func celFileMatcherMacroExpander() parser.MacroExpander {
	return func(eh parser.ExprHelper, target ast.Expr, args []ast.Expr) (ast.Expr, *common.Error) {