26ee4cb6c8
Each request processed in a separate goroutine. In case of OOSM state, during response write, request goroutine blocks on channel which waits event from main thread about SHM_ACK message from router.
120 lines
2.0 KiB
Go
120 lines
2.0 KiB
Go
/*
|
|
* 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)
|
|
}
|