mirror of
https://github.com/caddyserver/caddy.git
synced 2025-10-31 10:37:24 -04:00
70 lines
2.0 KiB
Go
70 lines
2.0 KiB
Go
// Copyright 2015 Matthew Holt and The Caddy Authors
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package requestbody
|
|
|
|
import (
|
|
"io"
|
|
"net/http"
|
|
|
|
"github.com/caddyserver/caddy/v2"
|
|
"github.com/caddyserver/caddy/v2/modules/caddyhttp"
|
|
)
|
|
|
|
func init() {
|
|
caddy.RegisterModule(RequestBody{})
|
|
}
|
|
|
|
// RequestBody is a middleware for manipulating the request body.
|
|
type RequestBody struct {
|
|
// The maximum number of bytes to allow reading from the body by a later handler.
|
|
// If more bytes are read, an error with HTTP status 413 is returned.
|
|
MaxSize int64 `json:"max_size,omitempty"`
|
|
}
|
|
|
|
// CaddyModule returns the Caddy module information.
|
|
func (RequestBody) CaddyModule() caddy.ModuleInfo {
|
|
return caddy.ModuleInfo{
|
|
ID: "http.handlers.request_body",
|
|
New: func() caddy.Module { return new(RequestBody) },
|
|
}
|
|
}
|
|
|
|
func (rb RequestBody) ServeHTTP(w http.ResponseWriter, r *http.Request, next caddyhttp.Handler) error {
|
|
if r.Body == nil {
|
|
return next.ServeHTTP(w, r)
|
|
}
|
|
if rb.MaxSize > 0 {
|
|
r.Body = errorWrapper{http.MaxBytesReader(w, r.Body, rb.MaxSize)}
|
|
}
|
|
return next.ServeHTTP(w, r)
|
|
}
|
|
|
|
// errorWrapper wraps errors that are returned from Read()
|
|
// so that they can be associated with a proper status code.
|
|
type errorWrapper struct {
|
|
io.ReadCloser
|
|
}
|
|
|
|
func (ew errorWrapper) Read(p []byte) (n int, err error) {
|
|
n, err = ew.ReadCloser.Read(p)
|
|
if err != nil && err.Error() == "http: request body too large" {
|
|
err = caddyhttp.Error(http.StatusRequestEntityTooLarge, err)
|
|
}
|
|
return
|
|
}
|
|
|
|
// Interface guard
|
|
var _ caddyhttp.MiddlewareHandler = (*RequestBody)(nil)
|