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/*
* Copyright (C) NGINX, Inc.
*/
#include <nxt_main.h>
#include <nxt_router.h>
#include <nxt_http.h>
#include <nxt_router_request.h>
#include <nxt_port_memory_int.h>
#include <nxt_websocket.h>
#include <nxt_websocket_header.h>
static void nxt_http_websocket_client(nxt_task_t *task, void *obj, void *data);
static void nxt_http_websocket_error_handler(nxt_task_t *task, void *obj,
void *data);
const nxt_http_request_state_t nxt_http_websocket
nxt_aligned(64) =
{
.ready_handler = nxt_http_websocket_client,
.error_handler = nxt_http_websocket_error_handler,
};
static void
nxt_http_websocket_client(nxt_task_t *task, void *obj, void *data)
{
size_t frame_size, used_size, copy_size, buf_free_size;
size_t chunk_copy_size;
nxt_buf_t *out, *buf, **out_tail, *b, *next;
nxt_int_t res;
nxt_http_request_t *r;
nxt_request_rpc_data_t *req_rpc_data;
nxt_websocket_header_t *wsh;
r = obj;
req_rpc_data = r->req_rpc_data;
if (nxt_slow_path(req_rpc_data == NULL)) {
nxt_debug(task, "websocket client frame for destroyed request");
return;
}
nxt_debug(task, "http websocket client frame");
wsh = (nxt_websocket_header_t *) r->ws_frame->mem.pos;
frame_size = nxt_websocket_frame_header_size(wsh)
+ nxt_websocket_frame_payload_len(wsh);
buf = NULL;
buf_free_size = 0;
out = NULL;
out_tail = &out;
b = r->ws_frame;
while (b != NULL && frame_size > 0) {
used_size = nxt_buf_mem_used_size(&b->mem);
copy_size = nxt_min(used_size, frame_size);
while (copy_size > 0) {
if (buf == NULL || buf_free_size == 0) {
buf_free_size = nxt_min(frame_size, PORT_MMAP_DATA_SIZE);
buf = nxt_port_mmap_get_buf(task, &req_rpc_data->app->outgoing,
buf_free_size);
*out_tail = buf;
out_tail = &buf->next;
}
chunk_copy_size = nxt_min(buf_free_size, copy_size);
buf->mem.free = nxt_cpymem(buf->mem.free, b->mem.pos,
chunk_copy_size);
copy_size -= chunk_copy_size;
b->mem.pos += chunk_copy_size;
buf_free_size -= chunk_copy_size;
}
frame_size -= copy_size;
next = b->next;
b->next = NULL;
if (nxt_buf_mem_used_size(&b->mem) == 0) {
nxt_work_queue_add(&task->thread->engine->fast_work_queue,
b->completion_handler, task, b, b->parent);
r->ws_frame = next;
}
b = next;
}
res = nxt_port_socket_write(task, req_rpc_data->app_port,
NXT_PORT_MSG_WEBSOCKET, -1,
req_rpc_data->stream,
task->thread->engine->port->id, out);
if (nxt_slow_path(res != NXT_OK)) {
// TODO: handle
}
b = r->ws_frame;
if (b != NULL) {
used_size = nxt_buf_mem_used_size(&b->mem);
if (used_size > 0) {
nxt_memmove(b->mem.start, b->mem.pos, used_size);
b->mem.pos = b->mem.start;
b->mem.free = b->mem.start + used_size;
}
}
nxt_http_request_ws_frame_start(task, r, r->ws_frame);
}
static void
nxt_http_websocket_error_handler(nxt_task_t *task, void *obj, void *data)
{
nxt_http_request_t *r;
nxt_request_rpc_data_t *req_rpc_data;
nxt_debug(task, "http websocket error handler");
r = obj;
req_rpc_data = r->req_rpc_data;
if (req_rpc_data == NULL) {
nxt_debug(task, " req_rpc_data is NULL");
goto close_handler;
}
if (req_rpc_data->app_port == NULL) {
nxt_debug(task, " app_port is NULL");
goto close_handler;
}
(void) nxt_port_socket_write(task, req_rpc_data->app_port,
NXT_PORT_MSG_WEBSOCKET_LAST,
-1, req_rpc_data->stream,
task->thread->engine->port->id, NULL);
close_handler:
nxt_http_request_close_handler(task, obj, data);
}
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