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/*
* Copyright (C) Max Romanov
* Copyright (C) NGINX, Inc.
*/
package unit
/*
#include "nxt_cgo_lib.h"
*/
import "C"
import (
"net/http"
)
type response struct {
header http.Header
headerSent bool
req *http.Request
c_req C.uintptr_t
ch chan int
}
func new_response(c_req C.uintptr_t, req *http.Request) *response {
resp := &response{
header: http.Header{},
req: req,
c_req: c_req,
}
return resp
}
func (r *response) Header() http.Header {
return r.header
}
func (r *response) Write(p []byte) (n int, err error) {
if !r.headerSent {
r.WriteHeader(http.StatusOK)
}
l := len(p)
written := int(0)
br := buf_ref(p)
for written < l {
res := C.nxt_cgo_response_write(r.c_req, br, C.uint32_t(l - written))
written += int(res)
br += C.uintptr_t(res)
if (written < l) {
if r.ch == nil {
r.ch = make(chan int, 2)
}
wait_shm_ack(r.ch)
}
}
return written, nil
}
func (r *response) WriteHeader(code int) {
if r.headerSent {
// Note: explicitly using Stderr, as Stdout is our HTTP output.
nxt_go_warn("multiple response.WriteHeader calls")
return
}
r.headerSent = true
// Set a default Content-Type
if _, hasType := r.header["Content-Type"]; !hasType {
r.header.Add("Content-Type", "text/html; charset=utf-8")
}
fields := 0
fields_size := 0
for k, vv := range r.header {
for _, v := range vv {
fields++
fields_size += len(k) + len(v)
}
}
C.nxt_cgo_response_create(r.c_req, C.int(code), C.int(fields),
C.uint32_t(fields_size))
for k, vv := range r.header {
for _, v := range vv {
C.nxt_cgo_response_add_field(r.c_req, str_ref(k), C.uint8_t(len(k)),
str_ref(v), C.uint32_t(len(v)))
}
}
C.nxt_cgo_response_send(r.c_req)
}
func (r *response) Flush() {
if !r.headerSent {
r.WriteHeader(http.StatusOK)
}
}
var observer_registry_ observable
func wait_shm_ack(c chan int) {
observer_registry_.attach(c)
_ = <-c
}
//export nxt_go_shm_ack_handler
func nxt_go_shm_ack_handler() {
observer_registry_.notify(1)
}
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