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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
header_sent bool
c_req *C.nxt_unit_request_info_t
ch chan int
}
func (r *response) Header() http.Header {
return r.header
}
func (r *response) Write(p []byte) (n int, err error) {
if !r.header_sent {
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.header_sent {
nxt_go_warn("multiple response.WriteHeader calls")
return
}
r.header_sent = 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_unit_response_init(r.c_req, C.uint16_t(code), C.uint32_t(fields),
C.uint32_t(fields_size))
for k, vv := range r.header {
for _, v := range vv {
C.nxt_unit_response_add_field(r.c_req, str_ref(k), C.uint8_t(len(k)),
str_ref(v), C.uint32_t(len(v)))
}
}
C.nxt_unit_response_send(r.c_req)
}
func (r *response) Flush() {
if !r.header_sent {
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(ctx *C.nxt_unit_ctx_t) {
observer_registry_.notify(1)
}
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