mirror of
https://github.com/caddyserver/caddy.git
synced 2024-11-29 20:24:11 +08:00
cdf7cf5c3f
* WIP * HTTP2/Push for golang 1.8 * Push plugin completed for review * Correct build tag * Move push plugin position * Add build tags to tests * Gofmt that code * Add header/method validations * Load push plugin * Fixes for wrapping writers * Push after delivering file * Fixes, review changes * Remove build tags, support new syntax * Fix spelling * gofmt -s -w . * Gogland time * Add interface guards * gofmt * After review fixes
114 lines
3.5 KiB
Go
114 lines
3.5 KiB
Go
package httpserver
|
|
|
|
import (
|
|
"bufio"
|
|
"errors"
|
|
"net"
|
|
"net/http"
|
|
"time"
|
|
)
|
|
|
|
// ResponseRecorder is a type of http.ResponseWriter that captures
|
|
// the status code written to it and also the size of the body
|
|
// written in the response. A status code does not have
|
|
// to be written, however, in which case 200 must be assumed.
|
|
// It is best to have the constructor initialize this type
|
|
// with that default status code.
|
|
//
|
|
// Setting the Replacer field allows middlewares to type-assert
|
|
// the http.ResponseWriter to ResponseRecorder and set their own
|
|
// placeholder values for logging utilities to use.
|
|
//
|
|
// Beware when accessing the Replacer value; it may be nil!
|
|
type ResponseRecorder struct {
|
|
http.ResponseWriter
|
|
Replacer Replacer
|
|
status int
|
|
size int
|
|
start time.Time
|
|
}
|
|
|
|
// NewResponseRecorder makes and returns a new responseRecorder,
|
|
// which captures the HTTP Status code from the ResponseWriter
|
|
// and also the length of the response body written through it.
|
|
// Because a status is not set unless WriteHeader is called
|
|
// explicitly, this constructor initializes with a status code
|
|
// of 200 to cover the default case.
|
|
func NewResponseRecorder(w http.ResponseWriter) *ResponseRecorder {
|
|
return &ResponseRecorder{
|
|
ResponseWriter: w,
|
|
status: http.StatusOK,
|
|
start: time.Now(),
|
|
}
|
|
}
|
|
|
|
// WriteHeader records the status code and calls the
|
|
// underlying ResponseWriter's WriteHeader method.
|
|
func (r *ResponseRecorder) WriteHeader(status int) {
|
|
r.status = status
|
|
r.ResponseWriter.WriteHeader(status)
|
|
}
|
|
|
|
// Write is a wrapper that records the size of the body
|
|
// that gets written.
|
|
func (r *ResponseRecorder) Write(buf []byte) (int, error) {
|
|
n, err := r.ResponseWriter.Write(buf)
|
|
if err == nil {
|
|
r.size += n
|
|
}
|
|
return n, err
|
|
}
|
|
|
|
// Size is a Getter to size property
|
|
func (r *ResponseRecorder) Size() int {
|
|
return r.size
|
|
}
|
|
|
|
// Status is a Getter to status property
|
|
func (r *ResponseRecorder) Status() int {
|
|
return r.status
|
|
}
|
|
|
|
// Hijack implements http.Hijacker. It simply wraps the underlying
|
|
// ResponseWriter's Hijack method if there is one, or returns an error.
|
|
func (r *ResponseRecorder) Hijack() (net.Conn, *bufio.ReadWriter, error) {
|
|
if hj, ok := r.ResponseWriter.(http.Hijacker); ok {
|
|
return hj.Hijack()
|
|
}
|
|
return nil, nil, NonHijackerError{Underlying: r.ResponseWriter}
|
|
}
|
|
|
|
// Flush implements http.Flusher. It simply wraps the underlying
|
|
// ResponseWriter's Flush method if there is one, or does nothing.
|
|
func (r *ResponseRecorder) Flush() {
|
|
if f, ok := r.ResponseWriter.(http.Flusher); ok {
|
|
f.Flush()
|
|
} else {
|
|
panic(NonFlusherError{Underlying: r.ResponseWriter}) // should be recovered at the beginning of middleware stack
|
|
}
|
|
}
|
|
|
|
// CloseNotify implements http.CloseNotifier.
|
|
// It just inherits the underlying ResponseWriter's CloseNotify method.
|
|
func (r *ResponseRecorder) CloseNotify() <-chan bool {
|
|
if cn, ok := r.ResponseWriter.(http.CloseNotifier); ok {
|
|
return cn.CloseNotify()
|
|
}
|
|
panic(NonCloseNotifierError{Underlying: r.ResponseWriter})
|
|
}
|
|
|
|
// Push resource to client
|
|
func (r *ResponseRecorder) Push(target string, opts *http.PushOptions) error {
|
|
if pusher, hasPusher := r.ResponseWriter.(http.Pusher); hasPusher {
|
|
return pusher.Push(target, opts)
|
|
}
|
|
|
|
return errors.New("push is unavailable (probably chained http.ResponseWriter does not implement http.Pusher)")
|
|
}
|
|
|
|
// Interface guards
|
|
var _ http.Pusher = (*ResponseRecorder)(nil)
|
|
var _ http.Flusher = (*ResponseRecorder)(nil)
|
|
var _ http.CloseNotifier = (*ResponseRecorder)(nil)
|
|
var _ http.Hijacker = (*ResponseRecorder)(nil)
|