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/*
* Copyright (C) Igor Sysoev
* Copyright (C) Nginx, Inc.
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
static ngx_int_t ngx_http_stub_status_handler(ngx_http_request_t *r);
static ngx_int_t ngx_http_stub_status_variable(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data);
static ngx_int_t ngx_http_stub_status_add_variables(ngx_conf_t *cf);
static char *ngx_http_set_stub_status(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static ngx_command_t ngx_http_status_commands[] = {
{ ngx_string("stub_status"),
NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_NOARGS|NGX_CONF_TAKE1,
ngx_http_set_stub_status,
0,
0,
NULL },
ngx_null_command
};
static ngx_http_module_t ngx_http_stub_status_module_ctx = {
ngx_http_stub_status_add_variables, /* preconfiguration */
NULL, /* postconfiguration */
NULL, /* create main configuration */
NULL, /* init main configuration */
NULL, /* create server configuration */
NULL, /* merge server configuration */
NULL, /* create location configuration */
NULL /* merge location configuration */
};
ngx_module_t ngx_http_stub_status_module = {
NGX_MODULE_V1,
&ngx_http_stub_status_module_ctx, /* module context */
ngx_http_status_commands, /* module directives */
NGX_HTTP_MODULE, /* module type */
NULL, /* init master */
NULL, /* init module */
NULL, /* init process */
NULL, /* init thread */
NULL, /* exit thread */
NULL, /* exit process */
NULL, /* exit master */
NGX_MODULE_V1_PADDING
};
static ngx_http_variable_t ngx_http_stub_status_vars[] = {
{ ngx_string("connections_active"), NULL, ngx_http_stub_status_variable,
0, NGX_HTTP_VAR_NOCACHEABLE, 0 },
{ ngx_string("connections_reading"), NULL, ngx_http_stub_status_variable,
1, NGX_HTTP_VAR_NOCACHEABLE, 0 },
{ ngx_string("connections_writing"), NULL, ngx_http_stub_status_variable,
2, NGX_HTTP_VAR_NOCACHEABLE, 0 },
{ ngx_string("connections_waiting"), NULL, ngx_http_stub_status_variable,
3, NGX_HTTP_VAR_NOCACHEABLE, 0 },
{ ngx_null_string, NULL, NULL, 0, 0, 0 }
};
static ngx_int_t
ngx_http_stub_status_handler(ngx_http_request_t *r)
{
size_t size;
ngx_int_t rc;
ngx_buf_t *b;
ngx_chain_t out;
ngx_atomic_int_t ap, hn, ac, rq, rd, wr, wa;
if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD))) {
return NGX_HTTP_NOT_ALLOWED;
}
rc = ngx_http_discard_request_body(r);
if (rc != NGX_OK) {
return rc;
}
r->headers_out.content_type_len = sizeof("text/plain") - 1;
ngx_str_set(&r->headers_out.content_type, "text/plain");
r->headers_out.content_type_lowcase = NULL;
if (r->method == NGX_HTTP_HEAD) {
r->headers_out.status = NGX_HTTP_OK;
rc = ngx_http_send_header(r);
if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
return rc;
}
}
size = sizeof("Active connections: \n") + NGX_ATOMIC_T_LEN
+ sizeof("server accepts handled requests\n") - 1
+ 6 + 3 * NGX_ATOMIC_T_LEN
+ sizeof("Reading: Writing: Waiting: \n") + 3 * NGX_ATOMIC_T_LEN;
b = ngx_create_temp_buf(r->pool, size);
if (b == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
out.buf = b;
out.next = NULL;
ap = *ngx_stat_accepted;
hn = *ngx_stat_handled;
ac = *ngx_stat_active;
rq = *ngx_stat_requests;
rd = *ngx_stat_reading;
wr = *ngx_stat_writing;
wa = *ngx_stat_waiting;
b->last = ngx_sprintf(b->last, "Active connections: %uA \n", ac);
b->last = ngx_cpymem(b->last, "server accepts handled requests\n",
sizeof("server accepts handled requests\n") - 1);
b->last = ngx_sprintf(b->last, " %uA %uA %uA \n", ap, hn, rq);
b->last = ngx_sprintf(b->last, "Reading: %uA Writing: %uA Waiting: %uA \n",
rd, wr, wa);
r->headers_out.status = NGX_HTTP_OK;
r->headers_out.content_length_n = b->last - b->pos;
b->last_buf = (r == r->main) ? 1 : 0;
b->last_in_chain = 1;
rc = ngx_http_send_header(r);
if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
return rc;
}
return ngx_http_output_filter(r, &out);
}
static ngx_int_t
ngx_http_stub_status_variable(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
u_char *p;
ngx_atomic_int_t value;
p = ngx_pnalloc(r->pool, NGX_ATOMIC_T_LEN);
if (p == NULL) {
return NGX_ERROR;
}
switch (data) {
case 0:
value = *ngx_stat_active;
break;
case 1:
value = *ngx_stat_reading;
break;
case 2:
value = *ngx_stat_writing;
break;
case 3:
value = *ngx_stat_waiting;
break;
/* suppress warning */
default:
value = 0;
break;
}
v->len = ngx_sprintf(p, "%uA", value) - p;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = p;
return NGX_OK;
}
static ngx_int_t
ngx_http_stub_status_add_variables(ngx_conf_t *cf)
{
ngx_http_variable_t *var, *v;
for (v = ngx_http_stub_status_vars; v->name.len; v++) {
var = ngx_http_add_variable(cf, &v->name, v->flags);
if (var == NULL) {
return NGX_ERROR;
}
var->get_handler = v->get_handler;
var->data = v->data;
}
return NGX_OK;
}
static char *
ngx_http_set_stub_status(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_http_core_loc_conf_t *clcf;
clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
clcf->handler = ngx_http_stub_status_handler;
return NGX_CONF_OK;
}
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