mirror of
https://github.com/caddyserver/caddy.git
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70 lines
2.2 KiB
Go
70 lines
2.2 KiB
Go
// Copyright 2015 Matthew Holt and The Caddy Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package caddyhttp
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import (
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"fmt"
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"net/http"
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"strconv"
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"github.com/caddyserver/caddy/v2"
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)
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func init() {
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caddy.RegisterModule(StaticError{})
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}
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// StaticError implements a simple handler that returns an error.
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// This handler returns an error value, but does not write a response.
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// This is useful when you want the server to act as if an error
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// occurred; for example, to invoke your custom error handling logic.
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//
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// Since this handler does not write a response, the error information
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// is for use by the server to know how to handle the error.
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type StaticError struct {
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// The error message. Optional. Default is no error message.
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Error string `json:"error,omitempty"`
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// The recommended HTTP status code. Can be either an integer or a
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// string if placeholders are needed. Optional. Default is 500.
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StatusCode WeakString `json:"status_code,omitempty"`
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}
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// CaddyModule returns the Caddy module information.
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func (StaticError) CaddyModule() caddy.ModuleInfo {
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return caddy.ModuleInfo{
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ID: "http.handlers.error",
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New: func() caddy.Module { return new(StaticError) },
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}
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}
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func (e StaticError) ServeHTTP(w http.ResponseWriter, r *http.Request, _ Handler) error {
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repl := r.Context().Value(caddy.ReplacerCtxKey).(*caddy.Replacer)
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statusCode := http.StatusInternalServerError
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if codeStr := e.StatusCode.String(); codeStr != "" {
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intVal, err := strconv.Atoi(repl.ReplaceAll(codeStr, ""))
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if err != nil {
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return Error(http.StatusInternalServerError, err)
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}
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statusCode = intVal
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}
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return Error(statusCode, fmt.Errorf("%s", e.Error))
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}
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// Interface guard
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var _ MiddlewareHandler = (*StaticError)(nil)
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