97 lines
2.1 KiB
Go
97 lines
2.1 KiB
Go
// Copyright 2021 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package context
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import (
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"net/http"
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)
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// ResponseWriter represents a response writer for HTTP
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type ResponseWriter interface {
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http.ResponseWriter
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Flush()
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Status() int
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Before(func(ResponseWriter))
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Size() int
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}
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var _ ResponseWriter = &Response{}
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// Response represents a response
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type Response struct {
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http.ResponseWriter
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written int
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status int
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befores []func(ResponseWriter)
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beforeExecuted bool
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}
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// Size return written size
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func (r *Response) Size() int {
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return r.written
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}
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// Write writes bytes to HTTP endpoint
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func (r *Response) Write(bs []byte) (int, error) {
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if !r.beforeExecuted {
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for _, before := range r.befores {
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before(r)
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}
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r.beforeExecuted = true
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}
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size, err := r.ResponseWriter.Write(bs)
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r.written += size
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if err != nil {
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return size, err
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}
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if r.status == 0 {
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r.status = http.StatusOK
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}
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return size, nil
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}
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// WriteHeader write status code
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func (r *Response) WriteHeader(statusCode int) {
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if !r.beforeExecuted {
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for _, before := range r.befores {
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before(r)
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}
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r.beforeExecuted = true
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}
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if r.status == 0 {
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r.status = statusCode
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r.ResponseWriter.WriteHeader(statusCode)
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}
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}
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// Flush flush cached data
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func (r *Response) Flush() {
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if f, ok := r.ResponseWriter.(http.Flusher); ok {
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f.Flush()
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}
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}
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// Status returned status code written
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func (r *Response) Status() int {
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return r.status
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}
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// Before allows for a function to be called before the ResponseWriter has been written to. This is
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// useful for setting headers or any other operations that must happen before a response has been written.
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func (r *Response) Before(f func(ResponseWriter)) {
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r.befores = append(r.befores, f)
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}
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// NewResponse creates a response
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func NewResponse(resp http.ResponseWriter) *Response {
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if v, ok := resp.(*Response); ok {
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return v
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}
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return &Response{
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ResponseWriter: resp,
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status: 0,
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befores: make([]func(ResponseWriter), 0),
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}
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}
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