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nginx/src/http/ngx_http_variables.c
Piotr Sikora b5fd7d5041 PCRE: retain input pattern for all regular expressions. 
Previously, input pattern was kept only for regular expressions
with named captures, which resulted in error log entries without
input pattern for PCRE errors that occured while processing
regular expressions without them.

Signed-off-by: Piotr Sikora <piotr@cloudflare.com>
2013-05-02 03:26:36 -07:00

2543 lines
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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_int_t ngx_http_variable_request(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static void ngx_http_variable_request_set(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
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_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_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 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_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("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_request_set,
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("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("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_null_string, NULL, NULL, 0, 0, 0 }
};
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");
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;
}
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;
}
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;
}
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: %d", index);
return NULL;
}
if (r->variables[index].not_found || r->variables[index].valid) {
return &r->variables[index];
}
v = cmcf->variables.elts;
if (v[index].get_handler(r, &r->variables[index], v[index].data)
== NGX_OK)
{
if (v[index].flags & NGX_HTTP_VAR_NOCACHEABLE) {
r->variables[index].no_cacheable = 1;
}
return &r->variables[index];
}
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)
{
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);
} else {
vv = ngx_palloc(r->pool, sizeof(ngx_http_variable_value_t));
if (vv && v->get_handler(r, vv, v->data) == NGX_OK) {
return vv;
}
return NULL;
}
}
vv = ngx_palloc(r->pool, sizeof(ngx_http_variable_value_t));
if (vv == NULL) {
return NULL;
}
if (ngx_strncmp(name->data, "http_", 5) == 0) {
if (ngx_http_variable_unknown_header_in(r, vv, (uintptr_t) name)
== NGX_OK)
{
return vv;
}
return NULL;
}
if (ngx_strncmp(name->data, "sent_http_", 10) == 0) {
if (ngx_http_variable_unknown_header_out(r, vv, (uintptr_t) name)
== NGX_OK)
{
return vv;
}
return NULL;
}
if (ngx_strncmp(name->data, "upstream_http_", 14) == 0) {
if (ngx_http_upstream_header_variable(r, vv, (uintptr_t) name)
== NGX_OK)
{
return vv;
}
return NULL;
}
if (ngx_strncmp(name->data, "cookie_", 7) == 0) {
if (ngx_http_variable_cookie(r, vv, (uintptr_t) name) == NGX_OK) {
return vv;
}
return NULL;
}
if (ngx_strncmp(name->data, "arg_", 4) == 0) {
if (ngx_http_variable_argument(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;
}
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;
}
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);
}
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->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
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;
struct sockaddr_in *sin;
#if (NGX_HAVE_INET6)
struct sockaddr_in6 *sin6;
#endif
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;
}
switch (r->connection->sockaddr->sa_family) {
#if (NGX_HAVE_INET6)
case AF_INET6:
sin6 = (struct sockaddr_in6 *) r->connection->sockaddr;
port = ntohs(sin6->sin6_port);
break;
#endif
default: /* AF_INET */
sin = (struct sockaddr_in *) r->connection->sockaddr;
port = ntohs(sin->sin_port);
break;
}
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;
struct sockaddr_in *sin;
#if (NGX_HAVE_INET6)
struct sockaddr_in6 *sin6;
#endif
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;
}
switch (r->connection->local_sockaddr->sa_family) {
#if (NGX_HAVE_INET6)
case AF_INET6:
sin6 = (struct sockaddr_in6 *) r->connection->local_sockaddr;
port = ntohs(sin6->sin6_port);
break;
#endif
default: /* AF_INET */
sin = (struct sockaddr_in *) r->connection->local_sockaddr;
port = ntohs(sin->sin_port);
break;
}
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 ngx_int_t
ngx_http_variable_is_args(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
if (r->args.len == 0) {
v->len = 0;
v->data = NULL;
return NGX_OK;
}
v->len = 1;
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_conf_full_name((ngx_cycle_t *) ngx_cycle, &path, 0) != 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_conf_full_name((ngx_cycle_t *) ngx_cycle, &path, 0) != 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("Last-Modified: 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->len = 0;
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_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", 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_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->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_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http regex set $%V to \"%*s\"",
&v[index].name, vv->len, vv->data);
}
#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_int_t rc;
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;
}
for (cv = ngx_http_core_variables; cv->name.len; cv++) {
v = ngx_palloc(cf->pool, sizeof(ngx_http_variable_t));
if (v == NULL) {
return NGX_ERROR;
}
*v = *cv;
rc = ngx_hash_add_key(cmcf->variables_keys, &v->name, v,
NGX_HASH_READONLY_KEY);
if (rc == NGX_OK) {
continue;
}
if (rc == NGX_BUSY) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"conflicting variable name \"%V\"", &v->name);
}
return NGX_ERROR;
}
return NGX_OK;
}
ngx_int_t
ngx_http_variables_init_vars(ngx_conf_t *cf)
{
ngx_uint_t i, n;
ngx_hash_key_t *key;
ngx_hash_init_t hash;
ngx_http_variable_t *v, *av;
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;
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 (av->get_handler
&& 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;
goto next;
}
}
if (ngx_strncmp(v[i].name.data, "http_", 5) == 0) {
v[i].get_handler = ngx_http_variable_unknown_header_in;
v[i].data = (uintptr_t) &v[i].name;
continue;
}
if (ngx_strncmp(v[i].name.data, "sent_http_", 10) == 0) {
v[i].get_handler = ngx_http_variable_unknown_header_out;
v[i].data = (uintptr_t) &v[i].name;
continue;
}
if (ngx_strncmp(v[i].name.data, "upstream_http_", 14) == 0) {
v[i].get_handler = ngx_http_upstream_header_variable;
v[i].data = (uintptr_t) &v[i].name;
v[i].flags = NGX_HTTP_VAR_NOCACHEABLE;
continue;
}
if (ngx_strncmp(v[i].name.data, "cookie_", 7) == 0) {
v[i].get_handler = ngx_http_variable_cookie;
v[i].data = (uintptr_t) &v[i].name;
continue;
}
if (ngx_strncmp(v[i].name.data, "arg_", 4) == 0) {
v[i].get_handler = ngx_http_variable_argument;
v[i].data = (uintptr_t) &v[i].name;
v[i].flags = NGX_HTTP_VAR_NOCACHEABLE;
continue;
}
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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