caddy/modules/caddyhttp/reverseproxy/fastcgi/record.go

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// 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 fastcgi
import (
"encoding/binary"
"errors"
"io"
)
type record struct {
h header
lr io.LimitedReader
padding int64
}
func (rec *record) fill(r io.Reader) (err error) {
rec.lr.N = rec.padding
rec.lr.R = r
if _, err = io.Copy(io.Discard, rec); err != nil {
return
}
if err = binary.Read(r, binary.BigEndian, &rec.h); err != nil {
return
}
if rec.h.Version != 1 {
err = errors.New("fcgi: invalid header version")
return
}
if rec.h.Type == EndRequest {
err = io.EOF
return
}
rec.lr.N = int64(rec.h.ContentLength)
rec.padding = int64(rec.h.PaddingLength)
return
}
func (rec *record) Read(p []byte) (n int, err error) {
return rec.lr.Read(p)
}
func (rec *record) hasMore() bool {
return rec.lr.N > 0
}