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nginx/src/http/ngx_http_log_module.c
Igor Sysoev 899b44eab2 nginx-0.1.29-RELEASE import 
*) Feature: the ngx_http_ssi_module supports "include virtual" command.

    *) Feature: the ngx_http_ssi_module supports the condition command like
       'if expr="$NAME"' and "else" and "endif" commands. Only one nested
       level is supported.

    *) Feature: the ngx_http_ssi_module supports the DATE_LOCAL and
       DATE_GMT variables and "config timefmt" command.

    *) Feature: the "ssi_ignore_recycled_buffers" directive.

    *) Bugfix: the "echo" command did not show the default value for the
       empty QUERY_STRING variable.

    *) Change: the ngx_http_proxy_module was rewritten.

    *) Feature: the "proxy_redirect", "proxy_pass_request_headers",
       "proxy_pass_request_body", and "proxy_method" directives.

    *) Feature: the "proxy_set_header" directive. The "proxy_x_var" was
       canceled and must be replaced with the proxy_set_header directive.

    *) Change: the "proxy_preserve_host" is canceled and must be replaced
       with the "proxy_set_header Host $host" and the "proxy_redirect off"
       directives, the "proxy_set_header Host $host:$proxy_port" directive
       and the appropriate proxy_redirect directives.

    *) Change: the "proxy_set_x_real_ip" is canceled and must be replaced
       with the "proxy_set_header X-Real-IP $remote_addr" directive.

    *) Change: the "proxy_add_x_forwarded_for" is canceled and must be
       replaced with
       the "proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for"
       directive.

    *) Change: the "proxy_set_x_url" is canceled and must be replaced with
       the "proxy_set_header X-URL http://$host:$server_port$request_uri"
       directive.

    *) Feature: the "fastcgi_param" directive.

    *) Change: the "fastcgi_root", "fastcgi_set_var" and "fastcgi_params"
       directive are canceled and must be replaced with the fastcgi_param
       directives.

    *) Feature: the "index" directive can use the variables.

    *) Feature: the "index" directive can be used at http and server levels.

    *) Change: the last index only in the "index" directive can be absolute.

    *) Feature: the "rewrite" directive can use the variables.

    *) Feature: the "internal" directive.

    *) Feature: the CONTENT_LENGTH, CONTENT_TYPE, REMOTE_PORT, SERVER_ADDR,
       SERVER_PORT, SERVER_PROTOCOL, DOCUMENT_ROOT, SERVER_NAME,
       REQUEST_METHOD, REQUEST_URI, and REMOTE_USER variables.

    *) Change: nginx now passes the invalid lines in a client request
       headers or a backend response header.

    *) Bugfix: if the backend did not transfer response for a long time and
       the "send_timeout" was less than "proxy_read_timeout", then nginx
       returned the 408 response.

    *) Bugfix: the segmentation fault was occurred if the backend sent an
       invalid line in response header; the bug had appeared in 0.1.26.

    *) Bugfix: the segmentation fault may occurred in FastCGI fault
       tolerance configuration.

    *) Bugfix: the "expires" directive did not remove the previous
       "Expires" and "Cache-Control" headers.

    *) Bugfix: nginx did not take into account trailing dot in "Host"
       header line.

    *) Bugfix: the ngx_http_auth_module did not work under Linux.

    *) Bugfix: the rewrite directive worked incorrectly, if the arguments
       were in a request.

    *) Bugfix: nginx could not be built on MacOS X.
2005-05-12 14:58:06 +00:00

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/*
* Copyright (C) Igor Sysoev
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
#include <nginx.h>
static u_char *ngx_http_log_addr(ngx_http_request_t *r, u_char *buf,
ngx_http_log_op_t *op);
static u_char *ngx_http_log_connection(ngx_http_request_t *r, u_char *buf,
ngx_http_log_op_t *op);
static u_char *ngx_http_log_pipe(ngx_http_request_t *r, u_char *buf,
ngx_http_log_op_t *op);
static u_char *ngx_http_log_time(ngx_http_request_t *r, u_char *buf,
ngx_http_log_op_t *op);
static u_char *ngx_http_log_msec(ngx_http_request_t *r, u_char *buf,
ngx_http_log_op_t *op);
static u_char *ngx_http_log_request_time(ngx_http_request_t *r, u_char *buf,
ngx_http_log_op_t *op);
static u_char *ngx_http_log_status(ngx_http_request_t *r, u_char *buf,
ngx_http_log_op_t *op);
static u_char *ngx_http_log_length(ngx_http_request_t *r, u_char *buf,
ngx_http_log_op_t *op);
static u_char *ngx_http_log_apache_length(ngx_http_request_t *r, u_char *buf,
ngx_http_log_op_t *op);
static u_char *ngx_http_log_request_length(ngx_http_request_t *r, u_char *buf,
ngx_http_log_op_t *op);
static size_t ngx_http_log_request_getlen(ngx_http_request_t *r,
uintptr_t data);
static u_char *ngx_http_log_request(ngx_http_request_t *r, u_char *buf,
ngx_http_log_op_t *op);
static ngx_int_t ngx_http_log_header_in_compile(ngx_conf_t *cf,
ngx_http_log_op_t *op, ngx_str_t *value);
static size_t ngx_http_log_header_in_getlen(ngx_http_request_t *r,
uintptr_t data);
static u_char *ngx_http_log_header_in(ngx_http_request_t *r, u_char *buf,
ngx_http_log_op_t *op);
static size_t ngx_http_log_unknown_header_in_getlen(ngx_http_request_t *r,
uintptr_t data);
static u_char *ngx_http_log_unknown_header_in(ngx_http_request_t *r,
u_char *buf, ngx_http_log_op_t *op);
static ngx_int_t ngx_http_log_header_out_compile(ngx_conf_t *cf,
ngx_http_log_op_t *op, ngx_str_t *value);
static size_t ngx_http_log_header_out_getlen(ngx_http_request_t *r,
uintptr_t data);
static u_char *ngx_http_log_header_out(ngx_http_request_t *r, u_char *buf,
ngx_http_log_op_t *op);
static size_t ngx_http_log_unknown_header_out_getlen(ngx_http_request_t *r,
uintptr_t data);
static u_char *ngx_http_log_unknown_header_out(ngx_http_request_t *r,
u_char *buf, ngx_http_log_op_t *op);
static u_char *ngx_http_log_connection_header_out(ngx_http_request_t *r,
u_char *buf, ngx_http_log_op_t *op);
static u_char *ngx_http_log_transfer_encoding_header_out(ngx_http_request_t *r,
u_char *buf, ngx_http_log_op_t *op);
static ngx_table_elt_t *ngx_http_log_unknown_header(ngx_list_t *headers,
ngx_str_t *value);
static ngx_int_t ngx_http_log_variable_compile(ngx_conf_t *cf,
ngx_http_log_op_t *op, ngx_str_t *value);
static size_t ngx_http_log_variable_getlen(ngx_http_request_t *r,
uintptr_t data);
static u_char *ngx_http_log_variable(ngx_http_request_t *r, u_char *buf,
ngx_http_log_op_t *op);
static ngx_int_t ngx_http_log_set_formats(ngx_conf_t *cf);
static void *ngx_http_log_create_main_conf(ngx_conf_t *cf);
static void *ngx_http_log_create_loc_conf(ngx_conf_t *cf);
static char *ngx_http_log_merge_loc_conf(ngx_conf_t *cf, void *parent,
void *child);
static char *ngx_http_log_set_log(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static char *ngx_http_log_set_format(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static ngx_command_t ngx_http_log_commands[] = {
{ ngx_string("log_format"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_2MORE,
ngx_http_log_set_format,
NGX_HTTP_MAIN_CONF_OFFSET,
0,
NULL },
{ ngx_string("access_log"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE12,
ngx_http_log_set_log,
NGX_HTTP_LOC_CONF_OFFSET,
0,
NULL },
ngx_null_command
};
ngx_http_module_t ngx_http_log_module_ctx = {
ngx_http_log_set_formats, /* preconfiguration */
NULL, /* postconfiguration */
ngx_http_log_create_main_conf, /* create main configuration */
NULL, /* init main configuration */
NULL, /* create server configuration */
NULL, /* merge server configuration */
ngx_http_log_create_loc_conf, /* create location configration */
ngx_http_log_merge_loc_conf /* merge location configration */
};
ngx_module_t ngx_http_log_module = {
NGX_MODULE_V1,
&ngx_http_log_module_ctx, /* module context */
ngx_http_log_commands, /* module directives */
NGX_HTTP_MODULE, /* module type */
NULL, /* init module */
NULL /* init process */
};
static ngx_str_t http_access_log = ngx_string(NGX_HTTP_LOG_PATH);
static ngx_str_t ngx_http_combined_fmt =
ngx_string("%addr - - [%time] \"%request\" %status %apache_length "
"\"%{Referer}i\" \"%{User-Agent}i\"");
ngx_http_log_op_name_t ngx_http_log_fmt_ops[] = {
{ ngx_string("addr"), INET_ADDRSTRLEN - 1, NULL, NULL, ngx_http_log_addr },
{ ngx_string("conn"), NGX_ATOMIC_T_LEN, NULL, NULL,
ngx_http_log_connection },
{ ngx_string("pipe"), 1, NULL, NULL, ngx_http_log_pipe },
{ ngx_string("time"), sizeof("28/Sep/1970:12:00:00 +0600") - 1,
NULL, NULL, ngx_http_log_time },
{ ngx_string("msec"), NGX_TIME_T_LEN + 4, NULL, NULL, ngx_http_log_msec },
{ ngx_string("request_time"), NGX_TIME_T_LEN, NULL, NULL,
ngx_http_log_request_time },
{ ngx_string("status"), 3, NULL, NULL, ngx_http_log_status },
{ ngx_string("length"), NGX_OFF_T_LEN, NULL, NULL, ngx_http_log_length },
{ ngx_string("apache_length"), NGX_OFF_T_LEN,
NULL, NULL, ngx_http_log_apache_length },
{ ngx_string("request_length"), NGX_SIZE_T_LEN,
NULL, NULL, ngx_http_log_request_length },
{ ngx_string("request"), 0, NULL,
ngx_http_log_request_getlen,
ngx_http_log_request },
{ ngx_string("i"), 0, ngx_http_log_header_in_compile, NULL,
ngx_http_log_header_in },
{ ngx_string("o"), 0, ngx_http_log_header_out_compile, NULL,
ngx_http_log_header_out },
{ ngx_string("v"), 0, ngx_http_log_variable_compile, NULL,
ngx_http_log_variable },
{ ngx_null_string, 0, NULL, NULL, NULL }
};
ngx_int_t
ngx_http_log_handler(ngx_http_request_t *r)
{
ngx_uint_t i, l;
u_char *line, *p;
size_t len;
ngx_http_log_t *log;
ngx_http_log_op_t *op;
ngx_http_log_loc_conf_t *lcf;
#if (NGX_WIN32)
u_long written;
#endif
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
"http log handler");
lcf = ngx_http_get_module_loc_conf(r, ngx_http_log_module);
if (lcf->off) {
return NGX_OK;
}
log = lcf->logs->elts;
for (l = 0; l < lcf->logs->nelts; l++) {
len = 0;
op = log[l].ops->elts;
for (i = 0; i < log[l].ops->nelts; i++) {
if (op[i].len == 0) {
len += op[i].getlen(r, op[i].data);
} else {
len += op[i].len;
}
}
#if (NGX_WIN32)
len += 2;
#else
len++;
#endif
line = ngx_palloc(r->pool, len);
if (line == NULL) {
return NGX_ERROR;
}
p = line;
for (i = 0; i < log[l].ops->nelts; i++) {
p = op[i].run(r, p, &op[i]);
}
#if (NGX_WIN32)
*p++ = CR; *p++ = LF;
WriteFile(log[l].file->fd, line, p - line, &written, NULL);
#else
*p++ = LF;
write(log[l].file->fd, line, p - line);
#endif
}
return NGX_OK;
}
static u_char *
ngx_http_log_copy_short(ngx_http_request_t *r, u_char *buf,
ngx_http_log_op_t *op)
{
size_t len;
uintptr_t data;
len = op->len;
data = op->data;
while (len--) {
*buf++ = (u_char) (data & 0xff);
data >>= 8;
}
return buf;
}
static u_char *
ngx_http_log_copy_long(ngx_http_request_t *r, u_char *buf,
ngx_http_log_op_t *op)
{
return ngx_cpymem(buf, (u_char *) op->data, op->len);
}
static u_char *
ngx_http_log_addr(ngx_http_request_t *r, u_char *buf, ngx_http_log_op_t *op)
{
return ngx_cpymem(buf, r->connection->addr_text.data,
r->connection->addr_text.len);
}
static u_char *
ngx_http_log_connection(ngx_http_request_t *r, u_char *buf,
ngx_http_log_op_t *op)
{
return ngx_sprintf(buf, "%ui", r->connection->number);
}
static u_char *
ngx_http_log_pipe(ngx_http_request_t *r, u_char *buf, ngx_http_log_op_t *op)
{
if (r->pipeline) {
*buf = 'p';
} else {
*buf = '.';
}
return buf + 1;
}
static u_char *
ngx_http_log_time(ngx_http_request_t *r, u_char *buf, ngx_http_log_op_t *op)
{
return ngx_cpymem(buf, ngx_cached_http_log_time.data,
ngx_cached_http_log_time.len);
}
static u_char *
ngx_http_log_msec(ngx_http_request_t *r, u_char *buf, ngx_http_log_op_t *op)
{
struct timeval tv;
ngx_gettimeofday(&tv);
return ngx_sprintf(buf, "%l.%03l", tv.tv_sec, tv.tv_usec / 1000);
}
static u_char *
ngx_http_log_request_time(ngx_http_request_t *r, u_char *buf,
ngx_http_log_op_t *op)
{
time_t elapsed;
elapsed = ngx_time() - r->start_time;
return ngx_sprintf(buf, "%T", elapsed);
}
static size_t
ngx_http_log_request_getlen(ngx_http_request_t *r, uintptr_t data)
{
return r->request_line.len;
}
static u_char *
ngx_http_log_request(ngx_http_request_t *r, u_char *buf, ngx_http_log_op_t *op)
{
return ngx_cpymem(buf, r->request_line.data, r->request_line.len);
}
static u_char *
ngx_http_log_status(ngx_http_request_t *r, u_char *buf, ngx_http_log_op_t *op)
{
return ngx_sprintf(buf, "%ui",
r->err_status ? r->err_status : r->headers_out.status);
}
static u_char *
ngx_http_log_length(ngx_http_request_t *r, u_char *buf, ngx_http_log_op_t *op)
{
return ngx_sprintf(buf, "%O", r->connection->sent);
}
static u_char *
ngx_http_log_apache_length(ngx_http_request_t *r, u_char *buf,
ngx_http_log_op_t *op)
{
off_t length;
length = r->connection->sent - r->header_size;
if (length > 0) {
return ngx_sprintf(buf, "%O", length);
}
*buf = '0';
return buf + 1;
}
static u_char *
ngx_http_log_request_length(ngx_http_request_t *r, u_char *buf,
ngx_http_log_op_t *op)
{
return ngx_sprintf(buf, "%z", r->request_length);
}
static ngx_int_t
ngx_http_log_header_in_compile(ngx_conf_t *cf, ngx_http_log_op_t *op,
ngx_str_t *value)
{
ngx_uint_t i;
op->len = 0;
for (i = 0; ngx_http_headers_in[i].name.len != 0; i++) {
if (ngx_http_headers_in[i].name.len != value->len) {
continue;
}
/* STUB: "Cookie" speacial handling */
if (ngx_http_headers_in[i].offset == 0) {
continue;
}
if (ngx_strncasecmp(ngx_http_headers_in[i].name.data, value->data,
value->len) == 0)
{
op->getlen = ngx_http_log_header_in_getlen;
op->run = ngx_http_log_header_in;
op->data = ngx_http_headers_in[i].offset;
return NGX_OK;
}
}
op->getlen = ngx_http_log_unknown_header_in_getlen;
op->run = ngx_http_log_unknown_header_in;
op->data = (uintptr_t) value;
return NGX_OK;
}
static size_t
ngx_http_log_header_in_getlen(ngx_http_request_t *r, uintptr_t data)
{
ngx_table_elt_t *h;
h = *(ngx_table_elt_t **) ((char *) &r->headers_in + data);
if (h) {
return h->value.len;
}
return 1;
}
static u_char *
ngx_http_log_header_in(ngx_http_request_t *r, u_char *buf,
ngx_http_log_op_t *op)
{
ngx_table_elt_t *h;
h = *(ngx_table_elt_t **) ((char *) &r->headers_in + op->data);
if (h) {
return ngx_cpymem(buf, h->value.data, h->value.len);
}
*buf = '-';
return buf + 1;
}
static size_t
ngx_http_log_unknown_header_in_getlen(ngx_http_request_t *r, uintptr_t data)
{
ngx_table_elt_t *h;
h = ngx_http_log_unknown_header(&r->headers_in.headers, (ngx_str_t *) data);
if (h) {
return h->value.len;
}
return 1;
}
static u_char *
ngx_http_log_unknown_header_in(ngx_http_request_t *r, u_char *buf,
ngx_http_log_op_t *op)
{
ngx_table_elt_t *h;
h = ngx_http_log_unknown_header(&r->headers_in.headers,
(ngx_str_t *) op->data);
if (h) {
return ngx_cpymem(buf, h->value.data, h->value.len);
}
*buf = '-';
return buf + 1;
}
static ngx_int_t
ngx_http_log_header_out_compile(ngx_conf_t *cf, ngx_http_log_op_t *op,
ngx_str_t *value)
{
ngx_uint_t i;
op->len = 0;
for (i = 0; ngx_http_headers_out[i].name.len != 0; i++) {
if (ngx_http_headers_out[i].name.len != value->len) {
continue;
}
if (ngx_strncasecmp(ngx_http_headers_out[i].name.data, value->data,
value->len) == 0)
{
op->getlen = ngx_http_log_header_out_getlen;
op->run = ngx_http_log_header_out;
op->data = ngx_http_headers_out[i].offset;
return NGX_OK;
}
}
if (value->len == sizeof("Connection") - 1
&& ngx_strncasecmp(value->data, "Connection", value->len) == 0)
{
op->len = sizeof("keep-alive") - 1;
op->getlen = NULL;
op->run = ngx_http_log_connection_header_out;
op->data = 0;
return NGX_OK;
}
if (value->len == sizeof("Transfer-Encoding") - 1
&& ngx_strncasecmp(value->data, "Transfer-Encoding", value->len) == 0)
{
op->len = sizeof("chunked") - 1;
op->getlen = NULL;
op->run = ngx_http_log_transfer_encoding_header_out;
op->data = 0;
return NGX_OK;
}
op->getlen = ngx_http_log_unknown_header_out_getlen;
op->run = ngx_http_log_unknown_header_out;
op->data = (uintptr_t) value;
return NGX_OK;
}
static size_t
ngx_http_log_header_out_getlen(ngx_http_request_t *r, uintptr_t data)
{
ngx_table_elt_t *h;
h = *(ngx_table_elt_t **) ((char *) &r->headers_out + data);
if (h) {
return h->value.len;
}
/*
* No header pointer was found.
* However, some headers: "Date", "Server", "Content-Length",
* and "Last-Modified" have a special handling in the header filter,
* but we do not set up their pointers in the filter,
* because they are too seldom needed to be logged.
*/
if (data == offsetof(ngx_http_headers_out_t, date)) {
return ngx_cached_http_time.len;
}
if (data == offsetof(ngx_http_headers_out_t, server)) {
return (sizeof(NGINX_VER) - 1);
}
if (data == offsetof(ngx_http_headers_out_t, content_length)) {
if (r->headers_out.content_length_n == -1) {
return 1;
}
return NGX_OFF_T_LEN;
}
if (data == offsetof(ngx_http_headers_out_t, last_modified)) {
if (r->headers_out.last_modified_time == -1) {
return 1;
}
return sizeof("Mon, 28 Sep 1970 06:00:00 GMT") - 1;
}
return 1;
}
static u_char *
ngx_http_log_header_out(ngx_http_request_t *r, u_char *buf,
ngx_http_log_op_t *op)
{
ngx_table_elt_t *h;
h = *(ngx_table_elt_t **) ((char *) &r->headers_out + op->data);
if (h) {
return ngx_cpymem(buf, h->value.data, h->value.len);
}
/*
* No header pointer was found.
* However, some headers: "Date", "Server", "Content-Length",
* and "Last-Modified" have a special handling in the header filter,
* but we do not set up their pointers in the filter,
* because they are too seldom needed to be logged.
*/
if (op->data == offsetof(ngx_http_headers_out_t, date)) {
return ngx_cpymem(buf, ngx_cached_http_time.data,
ngx_cached_http_time.len);
}
if (op->data == offsetof(ngx_http_headers_out_t, server)) {
return ngx_cpymem(buf, NGINX_VER, sizeof(NGINX_VER) - 1);
}
if (op->data == offsetof(ngx_http_headers_out_t, content_length)) {
if (r->headers_out.content_length_n == -1) {
*buf = '-';
return buf + 1;
}
return ngx_sprintf(buf, "%O", r->headers_out.content_length_n);
}
if (op->data == offsetof(ngx_http_headers_out_t, last_modified)) {
if (r->headers_out.last_modified_time == -1) {
*buf = '-';
return buf + 1;
}
return ngx_http_time(buf, r->headers_out.last_modified_time);
}
*buf = '-';
return buf + 1;
}
static size_t
ngx_http_log_unknown_header_out_getlen(ngx_http_request_t *r, uintptr_t data)
{
ngx_table_elt_t *h;
h = ngx_http_log_unknown_header(&r->headers_out.headers,
(ngx_str_t *) data);
if (h) {
return h->value.len;
}
return 1;
}
static u_char *
ngx_http_log_unknown_header_out(ngx_http_request_t *r, u_char *buf,
ngx_http_log_op_t *op)
{
ngx_table_elt_t *h;
h = ngx_http_log_unknown_header(&r->headers_out.headers,
(ngx_str_t *) op->data);
if (h) {
return ngx_cpymem(buf, h->value.data, h->value.len);
}
*buf = '-';
return buf + 1;
}
static ngx_table_elt_t *
ngx_http_log_unknown_header(ngx_list_t *headers, ngx_str_t *value)
{
ngx_uint_t i;
ngx_list_part_t *part;
ngx_table_elt_t *h;
part = &headers->part;
h = part->elts;
for (i = 0; /* void */; i++) {
if (i >= part->nelts) {
if (part->next == NULL) {
break;
}
part = part->next;
h = part->elts;
i = 0;
}
if (h[i].key.len != value->len) {
continue;
}
if (ngx_strncasecmp(h[i].key.data, value->data, value->len) == 0) {
return &h[i];
}
}
return NULL;
}
static u_char *
ngx_http_log_connection_header_out(ngx_http_request_t *r, u_char *buf,
ngx_http_log_op_t *op)
{
if (r->keepalive) {
return ngx_cpymem(buf, "keep-alive", sizeof("keep-alive") - 1);
} else {
return ngx_cpymem(buf, "close", sizeof("close") - 1);
}
}
static u_char *
ngx_http_log_transfer_encoding_header_out(ngx_http_request_t *r, u_char *buf,
ngx_http_log_op_t *op)
{
if (r->chunked) {
return ngx_cpymem(buf, "chunked", sizeof("chunked") - 1);
}
*buf = '-';
return buf + 1;
}
static ngx_int_t
ngx_http_log_variable_compile(ngx_conf_t *cf, ngx_http_log_op_t *op,
ngx_str_t *value)
{
ngx_int_t index;
index = ngx_http_get_variable_index(cf, value);
if (index == NGX_ERROR) {
return NGX_ERROR;
}
op->len = 0;
op->getlen = ngx_http_log_variable_getlen;
op->run = ngx_http_log_variable;
op->data = index;
return NGX_OK;
}
static size_t
ngx_http_log_variable_getlen(ngx_http_request_t *r, uintptr_t data)
{
ngx_http_variable_value_t *value;
value = ngx_http_get_indexed_variable(r, data);
if (value == NULL
|| value == NGX_HTTP_VAR_NOT_FOUND
|| value->text.len == 0)
{
return 1;
}
return value->text.len;
}
static u_char *
ngx_http_log_variable(ngx_http_request_t *r, u_char *buf, ngx_http_log_op_t *op)
{
ngx_http_variable_value_t *value;
value = ngx_http_get_indexed_variable(r, op->data);
if (value == NULL
|| value == NGX_HTTP_VAR_NOT_FOUND
|| value->text.len == 0)
{
*buf = '-';
return buf + 1;
}
return ngx_cpymem(buf, value->text.data, value->text.len);
}
static ngx_int_t
ngx_http_log_set_formats(ngx_conf_t *cf)
{
ngx_http_log_op_name_t *op;
for (op = ngx_http_log_fmt_ops; op->name.len; op++) { /* void */ }
op->run = NULL;
return NGX_OK;
}
static void *
ngx_http_log_create_main_conf(ngx_conf_t *cf)
{
ngx_http_log_main_conf_t *conf;
char *rc;
ngx_str_t *value;
conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_log_main_conf_t));
if (conf == NULL) {
return NGX_CONF_ERROR;
}
if (ngx_array_init(&conf->formats, cf->pool, 4, sizeof(ngx_http_log_fmt_t))
== NGX_ERROR)
{
return NGX_CONF_ERROR;
}
cf->args->nelts = 0;
value = ngx_array_push(cf->args);
if (value == NULL) {
return NGX_CONF_ERROR;
}
value = ngx_array_push(cf->args);
if (value == NULL) {
return NGX_CONF_ERROR;
}
value->len = sizeof("combined") - 1;
value->data = (u_char *) "combined";
value = ngx_array_push(cf->args);
if (value == NULL) {
return NGX_CONF_ERROR;
}
*value = ngx_http_combined_fmt;
rc = ngx_http_log_set_format(cf, NULL, conf);
if (rc != NGX_CONF_OK) {
return NULL;
}
return conf;
}
static void *
ngx_http_log_create_loc_conf(ngx_conf_t *cf)
{
ngx_http_log_loc_conf_t *conf;
conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_log_loc_conf_t));
if (conf == NULL) {
return NGX_CONF_ERROR;
}
return conf;
}
static char *
ngx_http_log_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
{
ngx_http_log_loc_conf_t *prev = parent;
ngx_http_log_loc_conf_t *conf = child;
ngx_http_log_t *log;
ngx_http_log_fmt_t *fmt;
ngx_http_log_main_conf_t *lmcf;
if (conf->logs == NULL) {
if (conf->off) {
return NGX_CONF_OK;
}
if (prev->logs) {
conf->logs = prev->logs;
} else {
if (prev->off) {
conf->off = prev->off;
return NGX_CONF_OK;
}
conf->logs = ngx_array_create(cf->pool, 2, sizeof(ngx_http_log_t));
if (conf->logs == NULL) {
return NGX_CONF_ERROR;
}
log = ngx_array_push(conf->logs);
if (log == NULL) {
return NGX_CONF_ERROR;
}
log->file = ngx_conf_open_file(cf->cycle, &http_access_log);
if (log->file == NULL) {
return NGX_CONF_ERROR;
}
lmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_log_module);
fmt = lmcf->formats.elts;
/* the default "combined" format */
log->ops = fmt[0].ops;
}
}
return NGX_CONF_OK;
}
static char *
ngx_http_log_set_log(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_http_log_loc_conf_t *llcf = conf;
ngx_uint_t i;
ngx_str_t *value, name;
ngx_http_log_t *log;
ngx_http_log_fmt_t *fmt;
ngx_http_log_main_conf_t *lmcf;
value = cf->args->elts;
if (ngx_strcmp(value[1].data, "off") == 0) {
llcf->off = 1;
return NGX_CONF_OK;
}
if (llcf->logs == NULL) {
llcf->logs = ngx_array_create(cf->pool, 2, sizeof(ngx_http_log_t));
if (llcf->logs == NULL) {
return NGX_CONF_ERROR;
}
}
lmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_log_module);
log = ngx_array_push(llcf->logs);
if (log == NULL) {
return NGX_CONF_ERROR;
}
log->file = ngx_conf_open_file(cf->cycle, &value[1]);
if (log->file == NULL) {
return NGX_CONF_ERROR;
}
if (cf->args->nelts == 3) {
name = value[2];
} else {
name.len = sizeof("combined") - 1;
name.data = (u_char *) "combined";
}
fmt = lmcf->formats.elts;
for (i = 0; i < lmcf->formats.nelts; i++) {
if (fmt[i].name.len == name.len
&& ngx_strcasecmp(fmt[i].name.data, name.data) == 0)
{
log->ops = fmt[i].ops;
return NGX_CONF_OK;
}
}
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"unknown log format \"%V\"", &name);
return NGX_CONF_ERROR;
}
static char *
ngx_http_log_set_format(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_http_log_main_conf_t *lmcf = conf;
ngx_uint_t s, f, invalid;
u_char *data, *p, *fname;
size_t i, len, fname_len;
ngx_str_t *value, arg, *a;
ngx_http_log_op_t *op;
ngx_http_log_fmt_t *fmt;
ngx_http_log_op_name_t *name;
value = cf->args->elts;
fmt = lmcf->formats.elts;
for (f = 0; f < lmcf->formats.nelts; f++) {
if (fmt[f].name.len == value[1].len
&& ngx_strcmp(fmt->name.data, value[1].data) == 0)
{
return "duplicate \"log_format\" name";
}
}
fmt = ngx_array_push(&lmcf->formats);
if (fmt == NULL) {
return NGX_CONF_ERROR;
}
fmt->name = value[1];
fmt->ops = ngx_array_create(cf->pool, 20, sizeof(ngx_http_log_op_t));
if (fmt->ops == NULL) {
return NGX_CONF_ERROR;
}
invalid = 0;
data = NULL;
arg.data = NULL;
for (s = 2; s < cf->args->nelts && !invalid; s++) {
i = 0;
while (i < value[s].len) {
op = ngx_array_push(fmt->ops);
if (op == NULL) {
return NGX_CONF_ERROR;
}
data = &value[s].data[i];
if (value[s].data[i] == '%') {
i++;
if (i == value[s].len) {
invalid = 1;
break;
}
if (value[s].data[i] == '{') {
i++;
arg.data = &value[s].data[i];
while (i < value[s].len && value[s].data[i] != '}') {
i++;
}
arg.len = &value[s].data[i] - arg.data;
if (i == value[s].len || arg.len == 0) {
invalid = 1;
break;
}
i++;
} else {
arg.len = 0;
}
fname = &value[s].data[i];
while (i < value[s].len
&& ((value[s].data[i] >= 'a' && value[s].data[i] <= 'z')
|| value[s].data[i] == '_'))
{
i++;
}
fname_len = &value[s].data[i] - fname;
if (fname_len == 0) {
invalid = 1;
break;
}
for (name = ngx_http_log_fmt_ops; name->run; name++) {
if (name->name.len == 0) {
name = (ngx_http_log_op_name_t *) name->run;
}
if (name->name.len == fname_len
&& ngx_strncmp(name->name.data, fname, fname_len) == 0)
{
if (name->compile == NULL) {
if (arg.len) {
fname[fname_len] = '\0';
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"\"%s\" must not have argument",
data);
return NGX_CONF_ERROR;
}
op->len = name->len;
op->getlen = name->getlen;
op->run = name->run;
op->data = 0;
break;
}
if (arg.len == 0) {
fname[fname_len] = '\0';
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"\"%s\" requires argument",
data);
return NGX_CONF_ERROR;
}
a = ngx_palloc(cf->pool, sizeof(ngx_str_t));
if (a == NULL) {
return NGX_CONF_ERROR;
}
*a = arg;
if (name->compile(cf, op, a) == NGX_ERROR) {
return NGX_CONF_ERROR;
}
break;
}
}
if (name->name.len == 0) {
invalid = 1;
break;
}
} else {
i++;
while (i < value[s].len && value[s].data[i] != '%') {
i++;
}
len = &value[s].data[i] - data;
if (len) {
op->len = len;
op->getlen = NULL;
if (len <= sizeof(uintptr_t)) {
op->run = ngx_http_log_copy_short;
op->data = 0;
while (len--) {
op->data <<= 8;
op->data |= data[len];
}
} else {
op->run = ngx_http_log_copy_long;
p = ngx_palloc(cf->pool, len);
if (p == NULL) {
return NGX_CONF_ERROR;
}
ngx_memcpy(p, data, len);
op->data = (uintptr_t) p;
}
}
}
}
}
if (invalid) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
"invalid parameter \"%s\"", data);
return NGX_CONF_ERROR;
}
return NGX_CONF_OK;
}
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