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nginx/src/http/ngx_http_variables.c
Roman Arutyunyan 746fba0d79 Copy regex unnamed captures to cloned subrequests. 
Previously, unnamed regex captures matched in the parent request, were not
available in a cloned subrequest.  Now 3 fields related to unnamed captures
are copied to a cloned subrequest: r->ncaptures, r->captures and
r->captures_data.  Since r->captures cannot be changed by either request after
creating a clone, a new flag r->realloc_captures is introduced to force
reallocation of r->captures.

The issue was reported as a proxy_cache_background_update misbehavior in
http://mailman.nginx.org/pipermail/nginx/2018-December/057251.html.
2018-12-11 13:09:00 +03:00

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/*
* Copyright (C) Igor Sysoev
* Copyright (C) Nginx, Inc.
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
#include <nginx.h>
static ngx_http_variable_t *ngx_http_add_prefix_variable(ngx_conf_t *cf,
ngx_str_t *name, ngx_uint_t flags);
static ngx_int_t ngx_http_variable_request(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
#if 0
static void ngx_http_variable_request_set(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
#endif
static ngx_int_t ngx_http_variable_request_get_size(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static void ngx_http_variable_request_set_size(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_header(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_cookies(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_headers(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_headers_internal(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data, u_char sep);
static ngx_int_t ngx_http_variable_unknown_header_in(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_unknown_header_out(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_unknown_trailer_out(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_request_line(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_cookie(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_argument(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
#if (NGX_HAVE_TCP_INFO)
static ngx_int_t ngx_http_variable_tcpinfo(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
#endif
static ngx_int_t ngx_http_variable_content_length(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_host(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_binary_remote_addr(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_remote_addr(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_remote_port(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_proxy_protocol_addr(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_proxy_protocol_port(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_server_addr(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_server_port(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_scheme(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_https(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static void ngx_http_variable_set_args(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_is_args(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_document_root(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_realpath_root(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_request_filename(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_server_name(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_request_method(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_remote_user(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_bytes_sent(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_body_bytes_sent(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_pipe(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_request_completion(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_request_body(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_request_body_file(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_request_length(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_request_time(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_request_id(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_status(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_sent_content_type(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_sent_content_length(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_sent_location(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_sent_last_modified(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_sent_connection(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_sent_keep_alive(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_sent_transfer_encoding(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_connection(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_connection_requests(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_nginx_version(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_hostname(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_pid(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_msec(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_time_iso8601(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_variable_time_local(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
/*
* TODO:
* Apache CGI: AUTH_TYPE, PATH_INFO (null), PATH_TRANSLATED
* REMOTE_HOST (null), REMOTE_IDENT (null),
* SERVER_SOFTWARE
*
* Apache SSI: DOCUMENT_NAME, LAST_MODIFIED, USER_NAME (file owner)
*/
/*
* the $http_host, $http_user_agent, $http_referer, and $http_via
* variables may be handled by generic
* ngx_http_variable_unknown_header_in(), but for performance reasons
* they are handled using dedicated entries
*/
static ngx_http_variable_t ngx_http_core_variables[] = {
{ ngx_string("http_host"), NULL, ngx_http_variable_header,
offsetof(ngx_http_request_t, headers_in.host), 0, 0 },
{ ngx_string("http_user_agent"), NULL, ngx_http_variable_header,
offsetof(ngx_http_request_t, headers_in.user_agent), 0, 0 },
{ ngx_string("http_referer"), NULL, ngx_http_variable_header,
offsetof(ngx_http_request_t, headers_in.referer), 0, 0 },
#if (NGX_HTTP_GZIP)
{ ngx_string("http_via"), NULL, ngx_http_variable_header,
offsetof(ngx_http_request_t, headers_in.via), 0, 0 },
#endif
#if (NGX_HTTP_X_FORWARDED_FOR)
{ ngx_string("http_x_forwarded_for"), NULL, ngx_http_variable_headers,
offsetof(ngx_http_request_t, headers_in.x_forwarded_for), 0, 0 },
#endif
{ ngx_string("http_cookie"), NULL, ngx_http_variable_cookies,
offsetof(ngx_http_request_t, headers_in.cookies), 0, 0 },
{ ngx_string("content_length"), NULL, ngx_http_variable_content_length,
0, 0, 0 },
{ ngx_string("content_type"), NULL, ngx_http_variable_header,
offsetof(ngx_http_request_t, headers_in.content_type), 0, 0 },
{ ngx_string("host"), NULL, ngx_http_variable_host, 0, 0, 0 },
{ ngx_string("binary_remote_addr"), NULL,
ngx_http_variable_binary_remote_addr, 0, 0, 0 },
{ ngx_string("remote_addr"), NULL, ngx_http_variable_remote_addr, 0, 0, 0 },
{ ngx_string("remote_port"), NULL, ngx_http_variable_remote_port, 0, 0, 0 },
{ ngx_string("proxy_protocol_addr"), NULL,
ngx_http_variable_proxy_protocol_addr, 0, 0, 0 },
{ ngx_string("proxy_protocol_port"), NULL,
ngx_http_variable_proxy_protocol_port, 0, 0, 0 },
{ ngx_string("server_addr"), NULL, ngx_http_variable_server_addr, 0, 0, 0 },
{ ngx_string("server_port"), NULL, ngx_http_variable_server_port, 0, 0, 0 },
{ ngx_string("server_protocol"), NULL, ngx_http_variable_request,
offsetof(ngx_http_request_t, http_protocol), 0, 0 },
{ ngx_string("scheme"), NULL, ngx_http_variable_scheme, 0, 0, 0 },
{ ngx_string("https"), NULL, ngx_http_variable_https, 0, 0, 0 },
{ ngx_string("request_uri"), NULL, ngx_http_variable_request,
offsetof(ngx_http_request_t, unparsed_uri), 0, 0 },
{ ngx_string("uri"), NULL, ngx_http_variable_request,
offsetof(ngx_http_request_t, uri),
NGX_HTTP_VAR_NOCACHEABLE, 0 },
{ ngx_string("document_uri"), NULL, ngx_http_variable_request,
offsetof(ngx_http_request_t, uri),
NGX_HTTP_VAR_NOCACHEABLE, 0 },
{ ngx_string("request"), NULL, ngx_http_variable_request_line, 0, 0, 0 },
{ ngx_string("document_root"), NULL,
ngx_http_variable_document_root, 0, NGX_HTTP_VAR_NOCACHEABLE, 0 },
{ ngx_string("realpath_root"), NULL,
ngx_http_variable_realpath_root, 0, NGX_HTTP_VAR_NOCACHEABLE, 0 },
{ ngx_string("query_string"), NULL, ngx_http_variable_request,
offsetof(ngx_http_request_t, args),
NGX_HTTP_VAR_NOCACHEABLE, 0 },
{ ngx_string("args"),
ngx_http_variable_set_args,
ngx_http_variable_request,
offsetof(ngx_http_request_t, args),
NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE, 0 },
{ ngx_string("is_args"), NULL, ngx_http_variable_is_args,
0, NGX_HTTP_VAR_NOCACHEABLE, 0 },
{ ngx_string("request_filename"), NULL,
ngx_http_variable_request_filename, 0,
NGX_HTTP_VAR_NOCACHEABLE, 0 },
{ ngx_string("server_name"), NULL, ngx_http_variable_server_name, 0, 0, 0 },
{ ngx_string("request_method"), NULL,
ngx_http_variable_request_method, 0,
NGX_HTTP_VAR_NOCACHEABLE, 0 },
{ ngx_string("remote_user"), NULL, ngx_http_variable_remote_user, 0, 0, 0 },
{ ngx_string("bytes_sent"), NULL, ngx_http_variable_bytes_sent,
0, 0, 0 },
{ ngx_string("body_bytes_sent"), NULL, ngx_http_variable_body_bytes_sent,
0, 0, 0 },
{ ngx_string("pipe"), NULL, ngx_http_variable_pipe,
0, 0, 0 },
{ ngx_string("request_completion"), NULL,
ngx_http_variable_request_completion,
0, 0, 0 },
{ ngx_string("request_body"), NULL,
ngx_http_variable_request_body,
0, 0, 0 },
{ ngx_string("request_body_file"), NULL,
ngx_http_variable_request_body_file,
0, 0, 0 },
{ ngx_string("request_length"), NULL, ngx_http_variable_request_length,
0, NGX_HTTP_VAR_NOCACHEABLE, 0 },
{ ngx_string("request_time"), NULL, ngx_http_variable_request_time,
0, NGX_HTTP_VAR_NOCACHEABLE, 0 },
{ ngx_string("request_id"), NULL,
ngx_http_variable_request_id,
0, 0, 0 },
{ ngx_string("status"), NULL,
ngx_http_variable_status, 0,
NGX_HTTP_VAR_NOCACHEABLE, 0 },
{ ngx_string("sent_http_content_type"), NULL,
ngx_http_variable_sent_content_type, 0, 0, 0 },
{ ngx_string("sent_http_content_length"), NULL,
ngx_http_variable_sent_content_length, 0, 0, 0 },
{ ngx_string("sent_http_location"), NULL,
ngx_http_variable_sent_location, 0, 0, 0 },
{ ngx_string("sent_http_last_modified"), NULL,
ngx_http_variable_sent_last_modified, 0, 0, 0 },
{ ngx_string("sent_http_connection"), NULL,
ngx_http_variable_sent_connection, 0, 0, 0 },
{ ngx_string("sent_http_keep_alive"), NULL,
ngx_http_variable_sent_keep_alive, 0, 0, 0 },
{ ngx_string("sent_http_transfer_encoding"), NULL,
ngx_http_variable_sent_transfer_encoding, 0, 0, 0 },
{ ngx_string("sent_http_cache_control"), NULL, ngx_http_variable_headers,
offsetof(ngx_http_request_t, headers_out.cache_control), 0, 0 },
{ ngx_string("sent_http_link"), NULL, ngx_http_variable_headers,
offsetof(ngx_http_request_t, headers_out.link), 0, 0 },
{ ngx_string("limit_rate"), ngx_http_variable_request_set_size,
ngx_http_variable_request_get_size,
offsetof(ngx_http_request_t, limit_rate),
NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE, 0 },
{ ngx_string("connection"), NULL,
ngx_http_variable_connection, 0, 0, 0 },
{ ngx_string("connection_requests"), NULL,
ngx_http_variable_connection_requests, 0, 0, 0 },
{ ngx_string("nginx_version"), NULL, ngx_http_variable_nginx_version,
0, 0, 0 },
{ ngx_string("hostname"), NULL, ngx_http_variable_hostname,
0, 0, 0 },
{ ngx_string("pid"), NULL, ngx_http_variable_pid,
0, 0, 0 },
{ ngx_string("msec"), NULL, ngx_http_variable_msec,
0, NGX_HTTP_VAR_NOCACHEABLE, 0 },
{ ngx_string("time_iso8601"), NULL, ngx_http_variable_time_iso8601,
0, NGX_HTTP_VAR_NOCACHEABLE, 0 },
{ ngx_string("time_local"), NULL, ngx_http_variable_time_local,
0, NGX_HTTP_VAR_NOCACHEABLE, 0 },
#if (NGX_HAVE_TCP_INFO)
{ ngx_string("tcpinfo_rtt"), NULL, ngx_http_variable_tcpinfo,
0, NGX_HTTP_VAR_NOCACHEABLE, 0 },
{ ngx_string("tcpinfo_rttvar"), NULL, ngx_http_variable_tcpinfo,
1, NGX_HTTP_VAR_NOCACHEABLE, 0 },
{ ngx_string("tcpinfo_snd_cwnd"), NULL, ngx_http_variable_tcpinfo,
2, NGX_HTTP_VAR_NOCACHEABLE, 0 },
{ ngx_string("tcpinfo_rcv_space"), NULL, ngx_http_variable_tcpinfo,
3, NGX_HTTP_VAR_NOCACHEABLE, 0 },
#endif
{ ngx_string("http_"), NULL, ngx_http_variable_unknown_header_in,
0, NGX_HTTP_VAR_PREFIX, 0 },
{ ngx_string("sent_http_"), NULL, ngx_http_variable_unknown_header_out,
0, NGX_HTTP_VAR_PREFIX, 0 },
{ ngx_string("sent_trailer_"), NULL, ngx_http_variable_unknown_trailer_out,
0, NGX_HTTP_VAR_PREFIX, 0 },
{ ngx_string("cookie_"), NULL, ngx_http_variable_cookie,
0, NGX_HTTP_VAR_PREFIX, 0 },
{ ngx_string("arg_"), NULL, ngx_http_variable_argument,
0, NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_PREFIX, 0 },
ngx_http_null_variable
};
ngx_http_variable_value_t ngx_http_variable_null_value =
ngx_http_variable("");
ngx_http_variable_value_t ngx_http_variable_true_value =
ngx_http_variable("1");
static ngx_uint_t ngx_http_variable_depth = 100;
ngx_http_variable_t *
ngx_http_add_variable(ngx_conf_t *cf, ngx_str_t *name, ngx_uint_t flags)
{
ngx_int_t rc;
ngx_uint_t i;
ngx_hash_key_t *key;
ngx_http_variable_t *v;
ngx_http_core_main_conf_t *cmcf;
if (name->len == 0) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"invalid variable name \"$\"");
return NULL;
}
if (flags & NGX_HTTP_VAR_PREFIX) {
return ngx_http_add_prefix_variable(cf, name, flags);
}
cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
key = cmcf->variables_keys->keys.elts;
for (i = 0; i < cmcf->variables_keys->keys.nelts; i++) {
if (name->len != key[i].key.len
|| ngx_strncasecmp(name->data, key[i].key.data, name->len) != 0)
{
continue;
}
v = key[i].value;
if (!(v->flags & NGX_HTTP_VAR_CHANGEABLE)) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"the duplicate \"%V\" variable", name);
return NULL;
}
if (!(flags & NGX_HTTP_VAR_WEAK)) {
v->flags &= ~NGX_HTTP_VAR_WEAK;
}
return v;
}
v = ngx_palloc(cf->pool, sizeof(ngx_http_variable_t));
if (v == NULL) {
return NULL;
}
v->name.len = name->len;
v->name.data = ngx_pnalloc(cf->pool, name->len);
if (v->name.data == NULL) {
return NULL;
}
ngx_strlow(v->name.data, name->data, name->len);
v->set_handler = NULL;
v->get_handler = NULL;
v->data = 0;
v->flags = flags;
v->index = 0;
rc = ngx_hash_add_key(cmcf->variables_keys, &v->name, v, 0);
if (rc == NGX_ERROR) {
return NULL;
}
if (rc == NGX_BUSY) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"conflicting variable name \"%V\"", name);
return NULL;
}
return v;
}
static ngx_http_variable_t *
ngx_http_add_prefix_variable(ngx_conf_t *cf, ngx_str_t *name, ngx_uint_t flags)
{
ngx_uint_t i;
ngx_http_variable_t *v;
ngx_http_core_main_conf_t *cmcf;
cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
v = cmcf->prefix_variables.elts;
for (i = 0; i < cmcf->prefix_variables.nelts; i++) {
if (name->len != v[i].name.len
|| ngx_strncasecmp(name->data, v[i].name.data, name->len) != 0)
{
continue;
}
v = &v[i];
if (!(v->flags & NGX_HTTP_VAR_CHANGEABLE)) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"the duplicate \"%V\" variable", name);
return NULL;
}
if (!(flags & NGX_HTTP_VAR_WEAK)) {
v->flags &= ~NGX_HTTP_VAR_WEAK;
}
return v;
}
v = ngx_array_push(&cmcf->prefix_variables);
if (v == NULL) {
return NULL;
}
v->name.len = name->len;
v->name.data = ngx_pnalloc(cf->pool, name->len);
if (v->name.data == NULL) {
return NULL;
}
ngx_strlow(v->name.data, name->data, name->len);
v->set_handler = NULL;
v->get_handler = NULL;
v->data = 0;
v->flags = flags;
v->index = 0;
return v;
}
ngx_int_t
ngx_http_get_variable_index(ngx_conf_t *cf, ngx_str_t *name)
{
ngx_uint_t i;
ngx_http_variable_t *v;
ngx_http_core_main_conf_t *cmcf;
if (name->len == 0) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"invalid variable name \"$\"");
return NGX_ERROR;
}
cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
v = cmcf->variables.elts;
if (v == NULL) {
if (ngx_array_init(&cmcf->variables, cf->pool, 4,
sizeof(ngx_http_variable_t))
!= NGX_OK)
{
return NGX_ERROR;
}
} else {
for (i = 0; i < cmcf->variables.nelts; i++) {
if (name->len != v[i].name.len
|| ngx_strncasecmp(name->data, v[i].name.data, name->len) != 0)
{
continue;
}
return i;
}
}
v = ngx_array_push(&cmcf->variables);
if (v == NULL) {
return NGX_ERROR;
}
v->name.len = name->len;
v->name.data = ngx_pnalloc(cf->pool, name->len);
if (v->name.data == NULL) {
return NGX_ERROR;
}
ngx_strlow(v->name.data, name->data, name->len);
v->set_handler = NULL;
v->get_handler = NULL;
v->data = 0;
v->flags = 0;
v->index = cmcf->variables.nelts - 1;
return v->index;
}
ngx_http_variable_value_t *
ngx_http_get_indexed_variable(ngx_http_request_t *r, ngx_uint_t index)
{
ngx_http_variable_t *v;
ngx_http_core_main_conf_t *cmcf;
cmcf = ngx_http_get_module_main_conf(r, ngx_http_core_module);
if (cmcf->variables.nelts <= index) {
ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
"unknown variable index: %ui", index);
return NULL;
}
if (r->variables[index].not_found || r->variables[index].valid) {
return &r->variables[index];
}
v = cmcf->variables.elts;
if (ngx_http_variable_depth == 0) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"cycle while evaluating variable \"%V\"",
&v[index].name);
return NULL;
}
ngx_http_variable_depth--;
if (v[index].get_handler(r, &r->variables[index], v[index].data)
== NGX_OK)
{
ngx_http_variable_depth++;
if (v[index].flags & NGX_HTTP_VAR_NOCACHEABLE) {
r->variables[index].no_cacheable = 1;
}
return &r->variables[index];
}
ngx_http_variable_depth++;
r->variables[index].valid = 0;
r->variables[index].not_found = 1;
return NULL;
}
ngx_http_variable_value_t *
ngx_http_get_flushed_variable(ngx_http_request_t *r, ngx_uint_t index)
{
ngx_http_variable_value_t *v;
v = &r->variables[index];
if (v->valid || v->not_found) {
if (!v->no_cacheable) {
return v;
}
v->valid = 0;
v->not_found = 0;
}
return ngx_http_get_indexed_variable(r, index);
}
ngx_http_variable_value_t *
ngx_http_get_variable(ngx_http_request_t *r, ngx_str_t *name, ngx_uint_t key)
{
size_t len;
ngx_uint_t i, n;
ngx_http_variable_t *v;
ngx_http_variable_value_t *vv;
ngx_http_core_main_conf_t *cmcf;
cmcf = ngx_http_get_module_main_conf(r, ngx_http_core_module);
v = ngx_hash_find(&cmcf->variables_hash, key, name->data, name->len);
if (v) {
if (v->flags & NGX_HTTP_VAR_INDEXED) {
return ngx_http_get_flushed_variable(r, v->index);
}
if (ngx_http_variable_depth == 0) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"cycle while evaluating variable \"%V\"", name);
return NULL;
}
ngx_http_variable_depth--;
vv = ngx_palloc(r->pool, sizeof(ngx_http_variable_value_t));
if (vv && v->get_handler(r, vv, v->data) == NGX_OK) {
ngx_http_variable_depth++;
return vv;
}
ngx_http_variable_depth++;
return NULL;
}
vv = ngx_palloc(r->pool, sizeof(ngx_http_variable_value_t));
if (vv == NULL) {
return NULL;
}
len = 0;
v = cmcf->prefix_variables.elts;
n = cmcf->prefix_variables.nelts;
for (i = 0; i < cmcf->prefix_variables.nelts; i++) {
if (name->len >= v[i].name.len && name->len > len
&& ngx_strncmp(name->data, v[i].name.data, v[i].name.len) == 0)
{
len = v[i].name.len;
n = i;
}
}
if (n != cmcf->prefix_variables.nelts) {
if (v[n].get_handler(r, vv, (uintptr_t) name) == NGX_OK) {
return vv;
}
return NULL;
}
vv->not_found = 1;
return vv;
}
static ngx_int_t
ngx_http_variable_request(ngx_http_request_t *r, ngx_http_variable_value_t *v,
uintptr_t data)
{
ngx_str_t *s;
s = (ngx_str_t *) ((char *) r + data);
if (s->data) {
v->len = s->len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = s->data;
} else {
v->not_found = 1;
}
return NGX_OK;
}
#if 0
static void
ngx_http_variable_request_set(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
ngx_str_t *s;
s = (ngx_str_t *) ((char *) r + data);
s->len = v->len;
s->data = v->data;
}
#endif
static ngx_int_t
ngx_http_variable_request_get_size(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
size_t *sp;
sp = (size_t *) ((char *) r + data);
v->data = ngx_pnalloc(r->pool, NGX_SIZE_T_LEN);
if (v->data == NULL) {
return NGX_ERROR;
}
v->len = ngx_sprintf(v->data, "%uz", *sp) - v->data;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
return NGX_OK;
}
static void
ngx_http_variable_request_set_size(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
ssize_t s, *sp;
ngx_str_t val;
val.len = v->len;
val.data = v->data;
s = ngx_parse_size(&val);
if (s == NGX_ERROR) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"invalid size \"%V\"", &val);
return;
}
sp = (ssize_t *) ((char *) r + data);
*sp = s;
return;
}
static ngx_int_t
ngx_http_variable_header(ngx_http_request_t *r, ngx_http_variable_value_t *v,
uintptr_t data)
{
ngx_table_elt_t *h;
h = *(ngx_table_elt_t **) ((char *) r + data);
if (h) {
v->len = h->value.len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = h->value.data;
} else {
v->not_found = 1;
}
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_cookies(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
return ngx_http_variable_headers_internal(r, v, data, ';');
}
static ngx_int_t
ngx_http_variable_headers(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
return ngx_http_variable_headers_internal(r, v, data, ',');
}
static ngx_int_t
ngx_http_variable_headers_internal(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data, u_char sep)
{
size_t len;
u_char *p, *end;
ngx_uint_t i, n;
ngx_array_t *a;
ngx_table_elt_t **h;
a = (ngx_array_t *) ((char *) r + data);
n = a->nelts;
h = a->elts;
len = 0;
for (i = 0; i < n; i++) {
if (h[i]->hash == 0) {
continue;
}
len += h[i]->value.len + 2;
}
if (len == 0) {
v->not_found = 1;
return NGX_OK;
}
len -= 2;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
if (n == 1) {
v->len = (*h)->value.len;
v->data = (*h)->value.data;
return NGX_OK;
}
p = ngx_pnalloc(r->pool, len);
if (p == NULL) {
return NGX_ERROR;
}
v->len = len;
v->data = p;
end = p + len;
for (i = 0; /* void */ ; i++) {
if (h[i]->hash == 0) {
continue;
}
p = ngx_copy(p, h[i]->value.data, h[i]->value.len);
if (p == end) {
break;
}
*p++ = sep; *p++ = ' ';
}
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_unknown_header_in(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
return ngx_http_variable_unknown_header(v, (ngx_str_t *) data,
&r->headers_in.headers.part,
sizeof("http_") - 1);
}
static ngx_int_t
ngx_http_variable_unknown_header_out(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
return ngx_http_variable_unknown_header(v, (ngx_str_t *) data,
&r->headers_out.headers.part,
sizeof("sent_http_") - 1);
}
static ngx_int_t
ngx_http_variable_unknown_trailer_out(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
return ngx_http_variable_unknown_header(v, (ngx_str_t *) data,
&r->headers_out.trailers.part,
sizeof("sent_trailer_") - 1);
}
ngx_int_t
ngx_http_variable_unknown_header(ngx_http_variable_value_t *v, ngx_str_t *var,
ngx_list_part_t *part, size_t prefix)
{
u_char ch;
ngx_uint_t i, n;
ngx_table_elt_t *header;
header = part->elts;
for (i = 0; /* void */ ; i++) {
if (i >= part->nelts) {
if (part->next == NULL) {
break;
}
part = part->next;
header = part->elts;
i = 0;
}
if (header[i].hash == 0) {
continue;
}
for (n = 0; n + prefix < var->len && n < header[i].key.len; n++) {
ch = header[i].key.data[n];
if (ch >= 'A' && ch <= 'Z') {
ch |= 0x20;
} else if (ch == '-') {
ch = '_';
}
if (var->data[n + prefix] != ch) {
break;
}
}
if (n + prefix == var->len && n == header[i].key.len) {
v->len = header[i].value.len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = header[i].value.data;
return NGX_OK;
}
}
v->not_found = 1;
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_request_line(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
u_char *p, *s;
s = r->request_line.data;
if (s == NULL) {
s = r->request_start;
if (s == NULL) {
v->not_found = 1;
return NGX_OK;
}
for (p = s; p < r->header_in->last; p++) {
if (*p == CR || *p == LF) {
break;
}
}
r->request_line.len = p - s;
r->request_line.data = s;
}
v->len = r->request_line.len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = s;
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_cookie(ngx_http_request_t *r, ngx_http_variable_value_t *v,
uintptr_t data)
{
ngx_str_t *name = (ngx_str_t *) data;
ngx_str_t cookie, s;
s.len = name->len - (sizeof("cookie_") - 1);
s.data = name->data + sizeof("cookie_") - 1;
if (ngx_http_parse_multi_header_lines(&r->headers_in.cookies, &s, &cookie)
== NGX_DECLINED)
{
v->not_found = 1;
return NGX_OK;
}
v->len = cookie.len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = cookie.data;
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_argument(ngx_http_request_t *r, ngx_http_variable_value_t *v,
uintptr_t data)
{
ngx_str_t *name = (ngx_str_t *) data;
u_char *arg;
size_t len;
ngx_str_t value;
len = name->len - (sizeof("arg_") - 1);
arg = name->data + sizeof("arg_") - 1;
if (ngx_http_arg(r, arg, len, &value) != NGX_OK) {
v->not_found = 1;
return NGX_OK;
}
v->data = value.data;
v->len = value.len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
return NGX_OK;
}
#if (NGX_HAVE_TCP_INFO)
static ngx_int_t
ngx_http_variable_tcpinfo(ngx_http_request_t *r, ngx_http_variable_value_t *v,
uintptr_t data)
{
struct tcp_info ti;
socklen_t len;
uint32_t value;
len = sizeof(struct tcp_info);
if (getsockopt(r->connection->fd, IPPROTO_TCP, TCP_INFO, &ti, &len) == -1) {
v->not_found = 1;
return NGX_OK;
}
v->data = ngx_pnalloc(r->pool, NGX_INT32_LEN);
if (v->data == NULL) {
return NGX_ERROR;
}
switch (data) {
case 0:
value = ti.tcpi_rtt;
break;
case 1:
value = ti.tcpi_rttvar;
break;
case 2:
value = ti.tcpi_snd_cwnd;
break;
case 3:
value = ti.tcpi_rcv_space;
break;
/* suppress warning */
default:
value = 0;
break;
}
v->len = ngx_sprintf(v->data, "%uD", value) - v->data;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
return NGX_OK;
}
#endif
static ngx_int_t
ngx_http_variable_content_length(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
u_char *p;
if (r->headers_in.content_length) {
v->len = r->headers_in.content_length->value.len;
v->data = r->headers_in.content_length->value.data;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
} else if (r->reading_body) {
v->not_found = 1;
v->no_cacheable = 1;
} else if (r->headers_in.content_length_n >= 0) {
p = ngx_pnalloc(r->pool, NGX_OFF_T_LEN);
if (p == NULL) {
return NGX_ERROR;
}
v->len = ngx_sprintf(p, "%O", r->headers_in.content_length_n) - p;
v->data = p;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
} else {
v->not_found = 1;
}
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_host(ngx_http_request_t *r, ngx_http_variable_value_t *v,
uintptr_t data)
{
ngx_http_core_srv_conf_t *cscf;
if (r->headers_in.server.len) {
v->len = r->headers_in.server.len;
v->data = r->headers_in.server.data;
} else {
cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module);
v->len = cscf->server_name.len;
v->data = cscf->server_name.data;
}
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_binary_remote_addr(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
struct sockaddr_in *sin;
#if (NGX_HAVE_INET6)
struct sockaddr_in6 *sin6;
#endif
switch (r->connection->sockaddr->sa_family) {
#if (NGX_HAVE_INET6)
case AF_INET6:
sin6 = (struct sockaddr_in6 *) r->connection->sockaddr;
v->len = sizeof(struct in6_addr);
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = sin6->sin6_addr.s6_addr;
break;
#endif
#if (NGX_HAVE_UNIX_DOMAIN)
case AF_UNIX:
v->len = r->connection->addr_text.len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = r->connection->addr_text.data;
break;
#endif
default: /* AF_INET */
sin = (struct sockaddr_in *) r->connection->sockaddr;
v->len = sizeof(in_addr_t);
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = (u_char *) &sin->sin_addr;
break;
}
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_remote_addr(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
v->len = r->connection->addr_text.len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = r->connection->addr_text.data;
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_remote_port(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
ngx_uint_t port;
v->len = 0;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = ngx_pnalloc(r->pool, sizeof("65535") - 1);
if (v->data == NULL) {
return NGX_ERROR;
}
port = ngx_inet_get_port(r->connection->sockaddr);
if (port > 0 && port < 65536) {
v->len = ngx_sprintf(v->data, "%ui", port) - v->data;
}
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_proxy_protocol_addr(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
v->len = r->connection->proxy_protocol_addr.len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = r->connection->proxy_protocol_addr.data;
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_proxy_protocol_port(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
ngx_uint_t port;
v->len = 0;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = ngx_pnalloc(r->pool, sizeof("65535") - 1);
if (v->data == NULL) {
return NGX_ERROR;
}
port = r->connection->proxy_protocol_port;
if (port > 0 && port < 65536) {
v->len = ngx_sprintf(v->data, "%ui", port) - v->data;
}
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_server_addr(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
ngx_str_t s;
u_char addr[NGX_SOCKADDR_STRLEN];
s.len = NGX_SOCKADDR_STRLEN;
s.data = addr;
if (ngx_connection_local_sockaddr(r->connection, &s, 0) != NGX_OK) {
return NGX_ERROR;
}
s.data = ngx_pnalloc(r->pool, s.len);
if (s.data == NULL) {
return NGX_ERROR;
}
ngx_memcpy(s.data, addr, s.len);
v->len = s.len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = s.data;
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_server_port(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
ngx_uint_t port;
v->len = 0;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
if (ngx_connection_local_sockaddr(r->connection, NULL, 0) != NGX_OK) {
return NGX_ERROR;
}
v->data = ngx_pnalloc(r->pool, sizeof("65535") - 1);
if (v->data == NULL) {
return NGX_ERROR;
}
port = ngx_inet_get_port(r->connection->local_sockaddr);
if (port > 0 && port < 65536) {
v->len = ngx_sprintf(v->data, "%ui", port) - v->data;
}
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_scheme(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
#if (NGX_HTTP_SSL)
if (r->connection->ssl) {
v->len = sizeof("https") - 1;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = (u_char *) "https";
return NGX_OK;
}
#endif
v->len = sizeof("http") - 1;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = (u_char *) "http";
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_https(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
#if (NGX_HTTP_SSL)
if (r->connection->ssl) {
v->len = sizeof("on") - 1;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = (u_char *) "on";
return NGX_OK;
}
#endif
*v = ngx_http_variable_null_value;
return NGX_OK;
}
static void
ngx_http_variable_set_args(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
r->args.len = v->len;
r->args.data = v->data;
r->valid_unparsed_uri = 0;
}
static ngx_int_t
ngx_http_variable_is_args(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
if (r->args.len == 0) {
*v = ngx_http_variable_null_value;
return NGX_OK;
}
v->len = 1;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = (u_char *) "?";
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_document_root(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
ngx_str_t path;
ngx_http_core_loc_conf_t *clcf;
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
if (clcf->root_lengths == NULL) {
v->len = clcf->root.len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = clcf->root.data;
} else {
if (ngx_http_script_run(r, &path, clcf->root_lengths->elts, 0,
clcf->root_values->elts)
== NULL)
{
return NGX_ERROR;
}
if (ngx_get_full_name(r->pool, (ngx_str_t *) &ngx_cycle->prefix, &path)
!= NGX_OK)
{
return NGX_ERROR;
}
v->len = path.len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = path.data;
}
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_realpath_root(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
u_char *real;
size_t len;
ngx_str_t path;
ngx_http_core_loc_conf_t *clcf;
#if (NGX_HAVE_MAX_PATH)
u_char buffer[NGX_MAX_PATH];
#endif
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
if (clcf->root_lengths == NULL) {
path = clcf->root;
} else {
if (ngx_http_script_run(r, &path, clcf->root_lengths->elts, 1,
clcf->root_values->elts)
== NULL)
{
return NGX_ERROR;
}
path.data[path.len - 1] = '\0';
if (ngx_get_full_name(r->pool, (ngx_str_t *) &ngx_cycle->prefix, &path)
!= NGX_OK)
{
return NGX_ERROR;
}
}
#if (NGX_HAVE_MAX_PATH)
real = buffer;
#else
real = NULL;
#endif
real = ngx_realpath(path.data, real);
if (real == NULL) {
ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno,
ngx_realpath_n " \"%s\" failed", path.data);
return NGX_ERROR;
}
len = ngx_strlen(real);
v->data = ngx_pnalloc(r->pool, len);
if (v->data == NULL) {
#if !(NGX_HAVE_MAX_PATH)
ngx_free(real);
#endif
return NGX_ERROR;
}
v->len = len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
ngx_memcpy(v->data, real, len);
#if !(NGX_HAVE_MAX_PATH)
ngx_free(real);
#endif
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_request_filename(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
size_t root;
ngx_str_t path;
if (ngx_http_map_uri_to_path(r, &path, &root, 0) == NULL) {
return NGX_ERROR;
}
/* ngx_http_map_uri_to_path() allocates memory for terminating '\0' */
v->len = path.len - 1;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = path.data;
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_server_name(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
ngx_http_core_srv_conf_t *cscf;
cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module);
v->len = cscf->server_name.len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = cscf->server_name.data;
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_request_method(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
if (r->main->method_name.data) {
v->len = r->main->method_name.len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = r->main->method_name.data;
} else {
v->not_found = 1;
}
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_remote_user(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
ngx_int_t rc;
rc = ngx_http_auth_basic_user(r);
if (rc == NGX_DECLINED) {
v->not_found = 1;
return NGX_OK;
}
if (rc == NGX_ERROR) {
return NGX_ERROR;
}
v->len = r->headers_in.user.len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = r->headers_in.user.data;
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_bytes_sent(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
u_char *p;
p = ngx_pnalloc(r->pool, NGX_OFF_T_LEN);
if (p == NULL) {
return NGX_ERROR;
}
v->len = ngx_sprintf(p, "%O", r->connection->sent) - p;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = p;
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_body_bytes_sent(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
off_t sent;
u_char *p;
sent = r->connection->sent - r->header_size;
if (sent < 0) {
sent = 0;
}
p = ngx_pnalloc(r->pool, NGX_OFF_T_LEN);
if (p == NULL) {
return NGX_ERROR;
}
v->len = ngx_sprintf(p, "%O", sent) - p;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = p;
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_pipe(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
v->data = (u_char *) (r->pipeline ? "p" : ".");
v->len = 1;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_status(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
ngx_uint_t status;
v->data = ngx_pnalloc(r->pool, NGX_INT_T_LEN);
if (v->data == NULL) {
return NGX_ERROR;
}
if (r->err_status) {
status = r->err_status;
} else if (r->headers_out.status) {
status = r->headers_out.status;
} else if (r->http_version == NGX_HTTP_VERSION_9) {
status = 9;
} else {
status = 0;
}
v->len = ngx_sprintf(v->data, "%03ui", status) - v->data;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_sent_content_type(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
if (r->headers_out.content_type.len) {
v->len = r->headers_out.content_type.len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = r->headers_out.content_type.data;
} else {
v->not_found = 1;
}
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_sent_content_length(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
u_char *p;
if (r->headers_out.content_length) {
v->len = r->headers_out.content_length->value.len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = r->headers_out.content_length->value.data;
return NGX_OK;
}
if (r->headers_out.content_length_n >= 0) {
p = ngx_pnalloc(r->pool, NGX_OFF_T_LEN);
if (p == NULL) {
return NGX_ERROR;
}
v->len = ngx_sprintf(p, "%O", r->headers_out.content_length_n) - p;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = p;
return NGX_OK;
}
v->not_found = 1;
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_sent_location(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
ngx_str_t name;
if (r->headers_out.location) {
v->len = r->headers_out.location->value.len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = r->headers_out.location->value.data;
return NGX_OK;
}
ngx_str_set(&name, "sent_http_location");
return ngx_http_variable_unknown_header(v, &name,
&r->headers_out.headers.part,
sizeof("sent_http_") - 1);
}
static ngx_int_t
ngx_http_variable_sent_last_modified(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
u_char *p;
if (r->headers_out.last_modified) {
v->len = r->headers_out.last_modified->value.len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = r->headers_out.last_modified->value.data;
return NGX_OK;
}
if (r->headers_out.last_modified_time >= 0) {
p = ngx_pnalloc(r->pool, sizeof("Mon, 28 Sep 1970 06:00:00 GMT") - 1);
if (p == NULL) {
return NGX_ERROR;
}
v->len = ngx_http_time(p, r->headers_out.last_modified_time) - p;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = p;
return NGX_OK;
}
v->not_found = 1;
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_sent_connection(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
size_t len;
char *p;
if (r->headers_out.status == NGX_HTTP_SWITCHING_PROTOCOLS) {
len = sizeof("upgrade") - 1;
p = "upgrade";
} else if (r->keepalive) {
len = sizeof("keep-alive") - 1;
p = "keep-alive";
} else {
len = sizeof("close") - 1;
p = "close";
}
v->len = len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = (u_char *) p;
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_sent_keep_alive(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
u_char *p;
ngx_http_core_loc_conf_t *clcf;
if (r->keepalive) {
clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
if (clcf->keepalive_header) {
p = ngx_pnalloc(r->pool, sizeof("timeout=") - 1 + NGX_TIME_T_LEN);
if (p == NULL) {
return NGX_ERROR;
}
v->len = ngx_sprintf(p, "timeout=%T", clcf->keepalive_header) - p;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = p;
return NGX_OK;
}
}
v->not_found = 1;
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_sent_transfer_encoding(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
if (r->chunked) {
v->len = sizeof("chunked") - 1;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = (u_char *) "chunked";
} else {
v->not_found = 1;
}
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_request_completion(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
if (r->request_complete) {
v->len = 2;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = (u_char *) "OK";
return NGX_OK;
}
*v = ngx_http_variable_null_value;
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_request_body(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
u_char *p;
size_t len;
ngx_buf_t *buf;
ngx_chain_t *cl;
if (r->request_body == NULL
|| r->request_body->bufs == NULL
|| r->request_body->temp_file)
{
v->not_found = 1;
return NGX_OK;
}
cl = r->request_body->bufs;
buf = cl->buf;
if (cl->next == NULL) {
v->len = buf->last - buf->pos;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = buf->pos;
return NGX_OK;
}
len = buf->last - buf->pos;
cl = cl->next;
for ( /* void */ ; cl; cl = cl->next) {
buf = cl->buf;
len += buf->last - buf->pos;
}
p = ngx_pnalloc(r->pool, len);
if (p == NULL) {
return NGX_ERROR;
}
v->data = p;
cl = r->request_body->bufs;
for ( /* void */ ; cl; cl = cl->next) {
buf = cl->buf;
p = ngx_cpymem(p, buf->pos, buf->last - buf->pos);
}
v->len = len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_request_body_file(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
if (r->request_body == NULL || r->request_body->temp_file == NULL) {
v->not_found = 1;
return NGX_OK;
}
v->len = r->request_body->temp_file->file.name.len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = r->request_body->temp_file->file.name.data;
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_request_length(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
u_char *p;
p = ngx_pnalloc(r->pool, NGX_OFF_T_LEN);
if (p == NULL) {
return NGX_ERROR;
}
v->len = ngx_sprintf(p, "%O", r->request_length) - p;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = p;
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_request_time(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
u_char *p;
ngx_time_t *tp;
ngx_msec_int_t ms;
p = ngx_pnalloc(r->pool, NGX_TIME_T_LEN + 4);
if (p == NULL) {
return NGX_ERROR;
}
tp = ngx_timeofday();
ms = (ngx_msec_int_t)
((tp->sec - r->start_sec) * 1000 + (tp->msec - r->start_msec));
ms = ngx_max(ms, 0);
v->len = ngx_sprintf(p, "%T.%03M", (time_t) ms / 1000, ms % 1000) - p;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = p;
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_request_id(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
u_char *id;
#if (NGX_OPENSSL)
u_char random_bytes[16];
#endif
id = ngx_pnalloc(r->pool, 32);
if (id == NULL) {
return NGX_ERROR;
}
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->len = 32;
v->data = id;
#if (NGX_OPENSSL)
if (RAND_bytes(random_bytes, 16) == 1) {
ngx_hex_dump(id, random_bytes, 16);
return NGX_OK;
}
ngx_ssl_error(NGX_LOG_ERR, r->connection->log, 0, "RAND_bytes() failed");
#endif
ngx_sprintf(id, "%08xD%08xD%08xD%08xD",
(uint32_t) ngx_random(), (uint32_t) ngx_random(),
(uint32_t) ngx_random(), (uint32_t) ngx_random());
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_connection(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
u_char *p;
p = ngx_pnalloc(r->pool, NGX_ATOMIC_T_LEN);
if (p == NULL) {
return NGX_ERROR;
}
v->len = ngx_sprintf(p, "%uA", r->connection->number) - p;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = p;
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_connection_requests(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
u_char *p;
p = ngx_pnalloc(r->pool, NGX_INT_T_LEN);
if (p == NULL) {
return NGX_ERROR;
}
v->len = ngx_sprintf(p, "%ui", r->connection->requests) - p;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = p;
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_nginx_version(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
v->len = sizeof(NGINX_VERSION) - 1;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = (u_char *) NGINX_VERSION;
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_hostname(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
v->len = ngx_cycle->hostname.len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = ngx_cycle->hostname.data;
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_pid(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
u_char *p;
p = ngx_pnalloc(r->pool, NGX_INT64_LEN);
if (p == NULL) {
return NGX_ERROR;
}
v->len = ngx_sprintf(p, "%P", ngx_pid) - p;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = p;
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_msec(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
u_char *p;
ngx_time_t *tp;
p = ngx_pnalloc(r->pool, NGX_TIME_T_LEN + 4);
if (p == NULL) {
return NGX_ERROR;
}
tp = ngx_timeofday();
v->len = ngx_sprintf(p, "%T.%03M", tp->sec, tp->msec) - p;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = p;
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_time_iso8601(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
u_char *p;
p = ngx_pnalloc(r->pool, ngx_cached_http_log_iso8601.len);
if (p == NULL) {
return NGX_ERROR;
}
ngx_memcpy(p, ngx_cached_http_log_iso8601.data,
ngx_cached_http_log_iso8601.len);
v->len = ngx_cached_http_log_iso8601.len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = p;
return NGX_OK;
}
static ngx_int_t
ngx_http_variable_time_local(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
u_char *p;
p = ngx_pnalloc(r->pool, ngx_cached_http_log_time.len);
if (p == NULL) {
return NGX_ERROR;
}
ngx_memcpy(p, ngx_cached_http_log_time.data, ngx_cached_http_log_time.len);
v->len = ngx_cached_http_log_time.len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = p;
return NGX_OK;
}
void *
ngx_http_map_find(ngx_http_request_t *r, ngx_http_map_t *map, ngx_str_t *match)
{
void *value;
u_char *low;
size_t len;
ngx_uint_t key;
len = match->len;
if (len) {
low = ngx_pnalloc(r->pool, len);
if (low == NULL) {
return NULL;
}
} else {
low = NULL;
}
key = ngx_hash_strlow(low, match->data, len);
value = ngx_hash_find_combined(&map->hash, key, low, len);
if (value) {
return value;
}
#if (NGX_PCRE)
if (len && map->nregex) {
ngx_int_t n;
ngx_uint_t i;
ngx_http_map_regex_t *reg;
reg = map->regex;
for (i = 0; i < map->nregex; i++) {
n = ngx_http_regex_exec(r, reg[i].regex, match);
if (n == NGX_OK) {
return reg[i].value;
}
if (n == NGX_DECLINED) {
continue;
}
/* NGX_ERROR */
return NULL;
}
}
#endif
return NULL;
}
#if (NGX_PCRE)
static ngx_int_t
ngx_http_variable_not_found(ngx_http_request_t *r, ngx_http_variable_value_t *v,
uintptr_t data)
{
v->not_found = 1;
return NGX_OK;
}
ngx_http_regex_t *
ngx_http_regex_compile(ngx_conf_t *cf, ngx_regex_compile_t *rc)
{
u_char *p;
size_t size;
ngx_str_t name;
ngx_uint_t i, n;
ngx_http_variable_t *v;
ngx_http_regex_t *re;
ngx_http_regex_variable_t *rv;
ngx_http_core_main_conf_t *cmcf;
rc->pool = cf->pool;
if (ngx_regex_compile(rc) != NGX_OK) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "%V", &rc->err);
return NULL;
}
re = ngx_pcalloc(cf->pool, sizeof(ngx_http_regex_t));
if (re == NULL) {
return NULL;
}
re->regex = rc->regex;
re->ncaptures = rc->captures;
re->name = rc->pattern;
cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
cmcf->ncaptures = ngx_max(cmcf->ncaptures, re->ncaptures);
n = (ngx_uint_t) rc->named_captures;
if (n == 0) {
return re;
}
rv = ngx_palloc(rc->pool, n * sizeof(ngx_http_regex_variable_t));
if (rv == NULL) {
return NULL;
}
re->variables = rv;
re->nvariables = n;
size = rc->name_size;
p = rc->names;
for (i = 0; i < n; i++) {
rv[i].capture = 2 * ((p[0] << 8) + p[1]);
name.data = &p[2];
name.len = ngx_strlen(name.data);
v = ngx_http_add_variable(cf, &name, NGX_HTTP_VAR_CHANGEABLE);
if (v == NULL) {
return NULL;
}
rv[i].index = ngx_http_get_variable_index(cf, &name);
if (rv[i].index == NGX_ERROR) {
return NULL;
}
v->get_handler = ngx_http_variable_not_found;
p += size;
}
return re;
}
ngx_int_t
ngx_http_regex_exec(ngx_http_request_t *r, ngx_http_regex_t *re, ngx_str_t *s)
{
ngx_int_t rc, index;
ngx_uint_t i, n, len;
ngx_http_variable_value_t *vv;
ngx_http_core_main_conf_t *cmcf;
cmcf = ngx_http_get_module_main_conf(r, ngx_http_core_module);
if (re->ncaptures) {
len = cmcf->ncaptures;
if (r->captures == NULL || r->realloc_captures) {
r->realloc_captures = 0;
r->captures = ngx_palloc(r->pool, len * sizeof(int));
if (r->captures == NULL) {
return NGX_ERROR;
}
}
} else {
len = 0;
}
rc = ngx_regex_exec(re->regex, s, r->captures, len);
if (rc == NGX_REGEX_NO_MATCHED) {
return NGX_DECLINED;
}
if (rc < 0) {
ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
ngx_regex_exec_n " failed: %i on \"%V\" using \"%V\"",
rc, s, &re->name);
return NGX_ERROR;
}
for (i = 0; i < re->nvariables; i++) {
n = re->variables[i].capture;
index = re->variables[i].index;
vv = &r->variables[index];
vv->len = r->captures[n + 1] - r->captures[n];
vv->valid = 1;
vv->no_cacheable = 0;
vv->not_found = 0;
vv->data = &s->data[r->captures[n]];
#if (NGX_DEBUG)
{
ngx_http_variable_t *v;
v = cmcf->variables.elts;
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http regex set $%V to \"%v\"", &v[index].name, vv);
}
#endif
}
r->ncaptures = rc * 2;
r->captures_data = s->data;
return NGX_OK;
}
#endif
ngx_int_t
ngx_http_variables_add_core_vars(ngx_conf_t *cf)
{
ngx_http_variable_t *cv, *v;
ngx_http_core_main_conf_t *cmcf;
cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
cmcf->variables_keys = ngx_pcalloc(cf->temp_pool,
sizeof(ngx_hash_keys_arrays_t));
if (cmcf->variables_keys == NULL) {
return NGX_ERROR;
}
cmcf->variables_keys->pool = cf->pool;
cmcf->variables_keys->temp_pool = cf->pool;
if (ngx_hash_keys_array_init(cmcf->variables_keys, NGX_HASH_SMALL)
!= NGX_OK)
{
return NGX_ERROR;
}
if (ngx_array_init(&cmcf->prefix_variables, cf->pool, 8,
sizeof(ngx_http_variable_t))
!= NGX_OK)
{
return NGX_ERROR;
}
for (cv = ngx_http_core_variables; cv->name.len; cv++) {
v = ngx_http_add_variable(cf, &cv->name, cv->flags);
if (v == NULL) {
return NGX_ERROR;
}
*v = *cv;
}
return NGX_OK;
}
ngx_int_t
ngx_http_variables_init_vars(ngx_conf_t *cf)
{
size_t len;
ngx_uint_t i, n;
ngx_hash_key_t *key;
ngx_hash_init_t hash;
ngx_http_variable_t *v, *av, *pv;
ngx_http_core_main_conf_t *cmcf;
/* set the handlers for the indexed http variables */
cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
v = cmcf->variables.elts;
pv = cmcf->prefix_variables.elts;
key = cmcf->variables_keys->keys.elts;
for (i = 0; i < cmcf->variables.nelts; i++) {
for (n = 0; n < cmcf->variables_keys->keys.nelts; n++) {
av = key[n].value;
if (v[i].name.len == key[n].key.len
&& ngx_strncmp(v[i].name.data, key[n].key.data, v[i].name.len)
== 0)
{
v[i].get_handler = av->get_handler;
v[i].data = av->data;
av->flags |= NGX_HTTP_VAR_INDEXED;
v[i].flags = av->flags;
av->index = i;
if (av->get_handler == NULL
|| (av->flags & NGX_HTTP_VAR_WEAK))
{
break;
}
goto next;
}
}
len = 0;
av = NULL;
for (n = 0; n < cmcf->prefix_variables.nelts; n++) {
if (v[i].name.len >= pv[n].name.len && v[i].name.len > len
&& ngx_strncmp(v[i].name.data, pv[n].name.data, pv[n].name.len)
== 0)
{
av = &pv[n];
len = pv[n].name.len;
}
}
if (av) {
v[i].get_handler = av->get_handler;
v[i].data = (uintptr_t) &v[i].name;
v[i].flags = av->flags;
goto next;
}
if (v[i].get_handler == NULL) {
ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
"unknown \"%V\" variable", &v[i].name);
return NGX_ERROR;
}
next:
continue;
}
for (n = 0; n < cmcf->variables_keys->keys.nelts; n++) {
av = key[n].value;
if (av->flags & NGX_HTTP_VAR_NOHASH) {
key[n].key.data = NULL;
}
}
hash.hash = &cmcf->variables_hash;
hash.key = ngx_hash_key;
hash.max_size = cmcf->variables_hash_max_size;
hash.bucket_size = cmcf->variables_hash_bucket_size;
hash.name = "variables_hash";
hash.pool = cf->pool;
hash.temp_pool = NULL;
if (ngx_hash_init(&hash, cmcf->variables_keys->keys.elts,
cmcf->variables_keys->keys.nelts)
!= NGX_OK)
{
return NGX_ERROR;
}
cmcf->variables_keys = NULL;
return NGX_OK;
}
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