mirror/nginx
1
0
Fork 0
mirror of https://github.com/nginx/nginx.git synced 2024-12-15 13:28:59 +08:00
Code Issues Actions Packages Projects Releases Wiki Activity
c55a104fcb
nginx/src/http/ngx_http_variables.c
Igor Sysoev c55a104fcb nginx-0.3.57-RELEASE import 
*) Feature: the $ssl_client_serial variable.

    *) Bugfix: in the "!-e" operator of the "if" directive.
       Thanks to Andrian Budanstov.

    *) Bugfix: while a client certificate verification nginx did not send
       to a client the required certificates information.

    *) Bugfix: the $document_root variable did not support the variables in
       the "root" directive.
2006-08-09 19:59:45 +00:00

1239 lines
30 KiB
C
Raw Blame History

/*
* Copyright (C) Igor Sysoev
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_event.h>
#include <ngx_http.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_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_headers(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
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_header(ngx_http_variable_value_t *v,
ngx_str_t *var, ngx_list_part_t *part, size_t prefix);
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_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_document_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_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_body_bytes_sent(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_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_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);
/*
* 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, $http_via,
* and $http_x_forwarded_for variables may be handled by generic
* ngx_http_variable_unknown_header_in(), but for perfomance 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_PROXY)
{ ngx_string("http_x_forwarded_for"), NULL, ngx_http_variable_header,
offsetof(ngx_http_request_t, headers_in.x_forwarded_for), 0, 0 },
#endif
{ ngx_string("http_cookie"), NULL, ngx_http_variable_headers,
offsetof(ngx_http_request_t, headers_in.cookies), 0, 0 },
{ ngx_string("content_length"), NULL, ngx_http_variable_header,
offsetof(ngx_http_request_t, headers_in.content_length), 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("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("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_NOCACHABLE, 0 },
{ ngx_string("document_uri"), NULL, ngx_http_variable_request,
offsetof(ngx_http_request_t, uri),
NGX_HTTP_VAR_NOCACHABLE, 0 },
{ ngx_string("request"), NULL, ngx_http_variable_request,
offsetof(ngx_http_request_t, request_line), 0, 0 },
{ ngx_string("document_root"), NULL,
ngx_http_variable_document_root, 0, NGX_HTTP_VAR_NOCACHABLE, 0 },
{ ngx_string("query_string"), NULL, ngx_http_variable_request,
offsetof(ngx_http_request_t, args),
NGX_HTTP_VAR_NOCACHABLE, 0 },
{ ngx_string("args"), NULL, ngx_http_variable_request,
offsetof(ngx_http_request_t, args),
NGX_HTTP_VAR_NOCACHABLE, 0 },
{ ngx_string("request_filename"), NULL,
ngx_http_variable_request_filename, 0,
NGX_HTTP_VAR_NOCACHABLE, 0 },
{ ngx_string("server_name"), NULL, ngx_http_variable_request,
offsetof(ngx_http_request_t, server_name), 0, 0 },
{ ngx_string("request_method"), NULL,
ngx_http_variable_request_method, 0, 0, 0 },
{ ngx_string("remote_user"), NULL, ngx_http_variable_remote_user, 0, 0, 0 },
{ ngx_string("body_bytes_sent"), NULL, ngx_http_variable_body_bytes_sent,
0, 0, 0 },
{ ngx_string("request_completion"), NULL,
ngx_http_variable_request_completion,
0, 0, 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_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,
offsetof(ngx_http_request_t, limit_rate),
NGX_HTTP_VAR_CHANGABLE|NGX_HTTP_VAR_NOCACHABLE, 0 },
{ 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;
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_CHANGABLE)) {
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_palloc(cf->pool, name->len);
if (v->name.data == NULL) {
return NULL;
}
for (i = 0; i < name->len; i++) {
v->name.data[i] = ngx_tolower(name->data[i]);
}
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;
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_ERROR)
{
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_palloc(cf->pool, name->len);
if (v->name.data == NULL) {
return NGX_ERROR;
}
for (i = 0; i < name->len; i++) {
v->name.data[i] = ngx_tolower(name->data[i]);
}
v->set_handler = NULL;
v->get_handler = NULL;
v->data = 0;
v->flags = 0;
v->index = cmcf->variables.nelts - 1;
return cmcf->variables.nelts - 1;
}
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_NOCACHABLE) {
r->variables[index].no_cachable = 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) {
if (!v->no_cachable) {
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_uint_t nowarn)
{
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_indexed_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;
}
vv->not_found = 1;
if (nowarn == 0) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"unknown \"%V\" variable", name);
}
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_cachable = 0;
v->not_found = 0;
v->data = s->data;
} else {
v->not_found = 1;
}
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 & 0xffff;
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_cachable = 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_headers(ngx_http_request_t *r, ngx_http_variable_value_t *v,
uintptr_t data)
{
ssize_t len;
u_char *p;
ngx_uint_t i, n;
ngx_array_t *a;
ngx_table_elt_t **h;
a = (ngx_array_t *) ((char *) r + data);
n = a->nelts;
if (n == 0) {
v->not_found = 1;
return NGX_OK;
}
v->valid = 1;
v->no_cachable = 0;
v->not_found = 0;
h = a->elts;
if (n == 1) {
v->len = (*h)->value.len;
v->data = (*h)->value.data;
return NGX_OK;
}
len = - (ssize_t) (sizeof("; ") - 1);
for (i = 0; i < n; i++) {
len += h[i]->value.len + sizeof("; ") - 1;
}
p = ngx_palloc(r->pool, len);
if (p == NULL) {
return NGX_ERROR;
}
v->len = len;
v->data = p;
for (i = 0; /* void */ ; i++) {
p = ngx_copy(p, h[i]->value.data, h[i]->value.len);
if (i == n - 1) {
break;
}
*p++ = ';'; *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_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;
}
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) {
v->len = header[i].value.len;
v->valid = 1;
v->no_cachable = 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_host(ngx_http_request_t *r, ngx_http_variable_value_t *v,
uintptr_t data)
{
if (r->headers_in.host) {
v->len = r->headers_in.host_name_len;
v->data = r->headers_in.host->value.data;
} else {
v->len = r->server_name.len;
v->data = r->server_name.data;
}
v->valid = 1;
v->no_cachable = 0;
v->not_found = 0;
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_cachable = 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;
v->len = 0;
v->valid = 1;
v->no_cachable = 0;
v->not_found = 0;
v->data = ngx_palloc(r->pool, sizeof("65535") - 1);
if (v->data == NULL) {
return NGX_ERROR;
}
/* AF_INET only */
if (r->connection->sockaddr->sa_family == AF_INET) {
sin = (struct sockaddr_in *) r->connection->sockaddr;
port = ntohs(sin->sin_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)
{
socklen_t len;
ngx_connection_t *c;
struct sockaddr_in sin;
v->data = ngx_palloc(r->pool, INET_ADDRSTRLEN);
if (v->data == NULL) {
return NGX_ERROR;
}
c = r->connection;
if (r->in_addr == 0) {
len = sizeof(struct sockaddr_in);
if (getsockname(c->fd, (struct sockaddr *) &sin, &len) == -1) {
ngx_log_error(NGX_LOG_CRIT, c->log,
ngx_socket_errno, "getsockname() failed");
return NGX_ERROR;
}
r->in_addr = sin.sin_addr.s_addr;
}
v->len = ngx_inet_ntop(c->listening->family, &r->in_addr,
v->data, INET_ADDRSTRLEN);
v->valid = 1;
v->no_cachable = 0;
v->not_found = 0;
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)
{
v->len = r->port_text->len - 1;
v->valid = 1;
v->no_cachable = 0;
v->not_found = 0;
v->data = r->port_text->data + 1;
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_cachable = 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) == NGX_ERROR) {
return NGX_ERROR;
}
v->len = path.len;
v->valid = 1;
v->no_cachable = 0;
v->not_found = 0;
v->data = path.data;
}
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)
{
ngx_str_t path;
if (ngx_http_map_uri_to_path(r, &path, 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_cachable = 0;
v->not_found = 0;
v->data = path.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_cachable = 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_cachable = 0;
v->not_found = 0;
v->data = r->headers_in.user.data;
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_palloc(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_cachable = 0;
v->not_found = 0;
v->data = p;
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_cachable = 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_cachable = 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_palloc(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_cachable = 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_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_cachable = 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_palloc(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_cachable = 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->keepalive) {
len = sizeof("keep-alive") - 1;
p = "keep-alive";
} else {
len = sizeof("close") - 1;
p = "close";
}
v->len = len;
v->valid = 1;
v->no_cachable = 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_palloc(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_cachable = 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_cachable = 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_cachable = 0;
v->not_found = 0;
v->data = (u_char *) "OK";
return NGX_OK;
}
v->len = 0;
v->valid = 1;
v->no_cachable = 0;
v->not_found = 0;
v->data = (u_char *) "";
return NGX_OK;
}
ngx_int_t
ngx_http_variables_add_core_vars(ngx_conf_t *cf)
{
ngx_int_t rc;
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);
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 (v = ngx_http_core_variables; v->name.len; v++) {
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++) {
if (v[i].name.len == key[n].key.len
&& ngx_strncmp(v[i].name.data, key[n].key.data, v[i].name.len)
== 0)
{
av = key[n].value;
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;
}
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;
}
Reference in New Issue View Git Blame Copy Permalink