Я пытаюсь создать модуль nginx на этапе доступа для чтения http-запросов, которые сопоставлены с данным блоком местоположения, и выгрузки информации URI запроса на локальный порт UDP.
#include <ngx_core.h>
#include <ngx_http.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#define PORT 8888
#define LOCALHOST "127.0.0.1"
/* Location Configuration */
typedef struct {
ngx_str_t name;
} ngx_dash_access_loc_conf_t;
/* core functionalities */
static ngx_int_t ngx_dash_access_handler(ngx_http_request_t *r);
static void *ngx_dash_access_create_loc_conf(ngx_conf_t *cf);
static char *ngx_dash_access_merge_loc_conf(ngx_conf_t *cf, void *parent,
void *child);
static ngx_int_t ngx_dash_access_init(ngx_conf_t *cf);
/* static file descriptor for udp socket*/
static struct sockaddr_in c_addr;
static ngx_int_t dash_req_fd;
/* commands */
static ngx_command_t ngx_dash_access_commands[] = {
{ ngx_string("dash_access"),
NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_dash_access_loc_conf_t, name),
NULL },
ngx_null_command
};
/* module context */
static ngx_http_module_t ngx_dash_access_module_ctx = {
NULL, /* preconfiguration */
ngx_dash_access_init, /* postconfiguration */
NULL, /* create main configuration */
NULL, /* init main configuration */
NULL, /* create server configuration */
NULL, /* merge server configuration */
ngx_dash_access_create_loc_conf,/* create location configuration */
ngx_dash_access_merge_loc_conf /* merge location configuration */
};
/* module definition */
ngx_module_t ngx_dash_access_module = {
NGX_MODULE_V1,
&ngx_dash_access_module_ctx,
ngx_dash_access_commands,
NGX_HTTP_MODULE,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NGX_MODULE_V1_PADDING
};
/* create loc config */
static void*
ngx_dash_access_create_loc_conf(ngx_conf_t *cf)
{
ngx_dash_access_loc_conf_t *conf;
conf = ngx_palloc(cf->pool,
sizeof(ngx_dash_access_loc_conf_t));
if (conf == NULL) {
return NULL;
}
return conf;
}
/* merge the location config */
static char*
ngx_dash_access_merge_loc_conf(ngx_conf_t *cf, void *parent,
void *child)
{
ngx_dash_access_loc_conf_t *prev = parent;
ngx_dash_access_loc_conf_t *conf = child;
ngx_conf_merge_str_value(conf->name, prev->name, "");
return NGX_CONF_OK;
}
/* initial config, add the handler to the access phase queue*/
static ngx_int_t
ngx_dash_access_init(ngx_conf_t *cf)
{
ngx_http_handler_pt *h;
ngx_http_core_main_conf_t *cmcf;
cmcf = ngx_http_conf_get_module_main_conf(cf,
ngx_http_core_module);
h = ngx_array_push(&cmcf->phases[NGX_HTTP_ACCESS_PHASE].handlers);
if (h == NULL) {
return NGX_ERROR;
}
*h = ngx_dash_access_handler;
/* create socket file descriptor */
if ((dash_req_fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
return NGX_ERROR;
}
memset(&c_addr, 0, sizeof(c_addr));
c_addr.sin_family = AF_INET;
c_addr.sin_port = htons(PORT);
if(inet_aton(LOCALHOST, &c_addr.sin_addr) == 0){
return NGX_ERROR;
}
return NGX_OK;
}
/* Here is the actual module definition */
static ngx_int_t
ngx_dash_access_handler(ngx_http_request_t *r)
{
char content_buf[200];
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"dash_access_handler");
/* log the request uri, the byte range request */
/* to be used in accordance with vod requests only */
if (r->uri.len != 0) {
sendto(dash_req_fd, r->uri.data, r->uri.len, 0, (struct sockaddr *)&c_addr, sizeof(struct sockaddr_in));
}
if (r->headers_in.range != NULL){
sprintf(content_buf, "key:%s val:%s", r->headers_in.range->key.data,
r->headers_in.range->value.data);
sendto(dash_req_fd, content_buf, strlen(content_buf),
0, (struct sockaddr *)&c_addr,
sizeof(struct sockaddr_in));
}
else {
sprintf(content_buf, "%s", "Content-Range unavailable");
sendto(dash_req_fd, content_buf, strlen(content_buf), 0,
(struct sockaddr *)&c_addr,
sizeof(struct sockaddr_in));
}
return NGX_DECLINED;
}
КонфигурацияЯ использую:
#user nobody;
worker_processes 1;
error_log logs/error.log;
error_log logs/error.log debug;
error_log logs/error.log error;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
#access_log logs/access.log main;
sendfile on;
keepalive_timeout 65;
server {
listen 80;
server_name localhost;
root /etc/nginx/html/dash/;
gzip on;
gzip_types application/vnd.apple.mpegurl application/dash+xml mpd;
#vod settings
vod_mode local;
vod_last_modified 'Sun, 15 Sep 2019 12:00:00 GMT';
vod_last_modified_types *;
vod_align_segments_to_key_frames on;
vod_manifest_duration_policy min;
#file handle caching / aio
open_file_cache max=1000 inactive=5m;
open_file_cache_valid 2m;
open_file_cache_min_uses 1;
open_file_cache_errors on;
aio on;
location /content/$ {
root /etc/nginx/html/dash/;
dash_access foo;
vod dash;
add_header Access-Control-Allow-Headers '*';
add_header Access-Control-Expose-Headers 'Server,range,Content-Length,Content-Range';
add_header Access-Control-Allow-Methods 'GET, HEAD, OPTIONS';
add_header Access-Control-Allow-Origin '*';
expires 100d;
}
location /dist/ {
root /etc/nginx/html/dash/shaka-player/;
}
location /javascript/ {
root /etc/nginx/html/dash/;
}
location / {
root /etc/nginx/html/dash/;
index pages/main.html;
}
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root html;
}
}
}
Я хочу, чтобы мой модуль выполнялся только для запросов http в блоке местоположения, в котором он определен, в моем случае в блоке location /content/$
. Но я обнаружил, что информация, сбрасываемая на порт UDP, также содержит Uris, которые обычно соответствуют другим блокам местоположения. Что я делаю неправильно? Извините за мои ограниченные знания с nginx, потому что я все еще новичок в этом.