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package main
// Taken from https://github.com/goods/httpbuf
import (
"bytes"
"net/http"
"sync"
)
//Buffer is a type that implements http.ResponseWriter but buffers all the data
//and headers.
type Buffer struct {
bytes.Buffer
Status int
headers http.Header
once sync.Once
}
//Header implements the header method of http.ResponseWriter
func (b *Buffer) Header() http.Header {
b.once.Do(func() {
b.headers = make(http.Header)
})
return b.headers
}
//WriteHeader implements the WriteHeader method of http.ResponseWriter
func (b *Buffer) WriteHeader(resp int) {
b.Status = resp
}
//Apply takes an http.ResponseWriter and calls the required methods on it to
//output the buffered headers, response code, and data. It returns the number
//of bytes written and any errors flushing.
func (b *Buffer) Apply(w http.ResponseWriter) (n int, err error) {
if len(b.headers) > 0 {
h := w.Header()
for key, val := range b.headers {
h[key] = val
}
}
if b.Status > 0 {
w.WriteHeader(b.Status)
}
n, err = w.Write(b.Bytes())
return
}
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