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|
package http
import (
"io"
"net/http"
"strings"
json "github.com/json-iterator/go"
"github.com/spiral/roadrunner"
)
// Response handles PSR7 response logic.
type Response struct {
// Status contains response status.
Status int `json:"status"`
// Header contains list of response headers.
Headers map[string][]string `json:"headers"`
// associated body payload.
body interface{}
}
// NewResponse creates new response based on given rr payload.
func NewResponse(p *roadrunner.Payload) (*Response, error) {
r := &Response{body: p.Body}
j := json.ConfigCompatibleWithStandardLibrary
if err := j.Unmarshal(p.Context, r); err != nil {
return nil, err
}
return r, nil
}
// Write writes response headers, status and body into ResponseWriter.
func (r *Response) Write(w http.ResponseWriter) error {
// INFO map is the reference type in golang
p := handlePushHeaders(r.Headers)
if pusher, ok := w.(http.Pusher); ok {
for _, v := range p {
err := pusher.Push(v, nil)
if err != nil {
return err
}
}
}
handleTrailers(r.Headers)
for n, h := range r.Headers {
for _, v := range h {
w.Header().Add(n, v)
}
}
w.WriteHeader(r.Status)
if data, ok := r.body.([]byte); ok {
_, err := w.Write(data)
if err != nil {
return handleWriteError(err)
}
}
if rc, ok := r.body.(io.Reader); ok {
if _, err := io.Copy(w, rc); err != nil {
return err
}
}
return nil
}
func handlePushHeaders(h map[string][]string) []string {
var p []string
pushHeader, ok := h[http2pushHeaderKey]
if !ok {
return p
}
p = append(p, pushHeader...)
delete(h, http2pushHeaderKey)
return p
}
func handleTrailers(h map[string][]string) {
trailers, ok := h[trailerHeaderKey]
if !ok {
return
}
for _, tr := range trailers {
for _, n := range strings.Split(tr, ",") {
n = strings.Trim(n, "\t ")
if v, ok := h[n]; ok {
h["Trailer:"+n] = v
delete(h, n)
}
}
}
delete(h, trailerHeaderKey)
}
|
