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/*
* Copyright (C) Igor Sysoev
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
typedef struct {
ngx_http_request_t *request;
ngx_pool_t *pool;
ngx_chain_t *head;
ngx_buf_t *last;
size_t size;
} ngx_http_status_ctx_t;
static ngx_int_t ngx_http_status(ngx_http_status_ctx_t *ctx);
static char *ngx_http_set_status(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static ngx_command_t ngx_http_status_commands[] = {
{ ngx_string("status"),
NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
ngx_http_set_status,
0,
0,
NULL },
ngx_null_command
};
ngx_http_module_t ngx_http_status_module_ctx = {
NULL, /* pre conf */
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_status_module = {
NGX_MODULE,
&ngx_http_status_module_ctx, /* module context */
ngx_http_status_commands, /* module directives */
NGX_HTTP_MODULE, /* module type */
NULL, /* init module */
NULL /* init process */
};
static ngx_int_t ngx_http_status_handler(ngx_http_request_t *r)
{
ngx_int_t rc;
ngx_http_status_ctx_t ctx;
if (r->method != NGX_HTTP_GET && r->method != NGX_HTTP_HEAD) {
return NGX_HTTP_NOT_ALLOWED;
}
rc = ngx_http_discard_body(r);
if (rc != NGX_OK && rc != NGX_AGAIN) {
return rc;
}
r->headers_out.content_type = ngx_list_push(&r->headers_out.headers);
if (r->headers_out.content_type == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
r->headers_out.content_type->key.len = 0;
r->headers_out.content_type->key.data = NULL;
r->headers_out.content_type->value.len = sizeof("text/plain") - 1;
r->headers_out.content_type->value.data = (u_char *) "text/plain";
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;
}
}
ctx.request = r;
ctx.pool = r->pool;
ctx.head = NULL;
ctx.size = 0;
if (ngx_http_status(&ctx) != NGX_OK) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
r->headers_out.status = NGX_HTTP_OK;
r->headers_out.content_length_n = ctx.size;
rc = ngx_http_send_header(r);
if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
return rc;
}
if (!r->main) {
ctx.last->last_buf = 1;
}
return ngx_http_output_filter(r, ctx.head);
}
static ngx_int_t ngx_http_status(ngx_http_status_ctx_t *ctx)
{
u_char ch;
size_t len, n;
ngx_uint_t i, dash;
ngx_buf_t *b;
ngx_chain_t *cl, **ll;
ngx_connection_t *c;
ngx_http_request_t *r;
ngx_http_core_main_conf_t *cmcf;
cmcf = ngx_http_get_module_main_conf(ctx->request, ngx_http_core_module);
#if (NGX_SUPPRESS_WARN)
b = NULL;
ll = NULL;
#endif
dash = 0;
/* TODO: old connections */
c = ngx_cycle->connections;
for (i = 0; i < ngx_cycle->connection_n; i++) {
/* TODO: trylock connection mutex */
r = c[i].data;
if (r && r->signature == NGX_HTTP_MODULE) {
/* STUB: should be NGX_PID_T_LEN */
len = NGX_INT64_LEN /* pid */
+ 1 + NGX_INT32_LEN /* connection */
+ 1 + 1 /* state */
+ 1 + INET_ADDRSTRLEN
+ 1 + (r->server_name ? cmcf->max_server_name_len : 1)
+ 2; /* "\r\n" */
/* BUG: cmcf->max_server_name_len and "*.domain.tld" */
if (r->request_line.len) {
len += 1 + 1 + r->request_line.len + 1;
}
if (!(b = ngx_create_temp_buf(ctx->pool, len))) {
/* TODO: unlock mutex */
return NGX_ERROR;
}
b->last += ngx_snprintf((char *) b->last,
/* STUB: should be NGX_PID_T_LEN */
NGX_INT64_LEN + NGX_INT32_LEN,
PID_T_FMT " %4u", ngx_pid, i);
switch (r->http_state) {
case NGX_HTTP_INITING_REQUEST_STATE:
ch = 'I';
break;
case NGX_HTTP_READING_REQUEST_STATE:
ch = 'R';
break;
case NGX_HTTP_PROCESS_REQUEST_STATE:
ch = 'P';
break;
case NGX_HTTP_WRITING_REQUEST_STATE:
ch = 'W';
break;
case NGX_HTTP_KEEPALIVE_STATE:
ch = 'K';
break;
default:
ch = '?';
}
*(b->last++) = ' ';
*(b->last++) = ch;
*(b->last++) = ' ';
b->last = ngx_cpymem(b->last, c[i].addr_text.data,
c[i].addr_text.len);
for (n = c[i].addr_text.len; n < INET_ADDRSTRLEN; n++) {
*(b->last++) = ' ';
}
*(b->last++) = ' ';
if (r->server_name) {
b->last = ngx_cpymem(b->last, r->server_name->data,
r->server_name->len);
for (n = r->server_name->len;
n < cmcf->max_server_name_len;
n++)
{
*(b->last++) = ' ';
}
} else {
*(b->last++) = '?';
}
if (r->request_line.len) {
*(b->last++) = ' ';
*(b->last++) = '"';
b->last = ngx_cpymem(b->last, r->request_line.data,
r->request_line.len);
*(b->last++) = '"';
}
*(b->last++) = CR; *(b->last++) = LF;
dash = 0;
} else if (c[i].fd != -1) {
len = NGX_INT64_LEN /* pid */
+ 1 + NGX_INT32_LEN /* connection */
+ 1 + 1 /* state */
+ 2; /* "\r\n" */
if (!(b = ngx_create_temp_buf(ctx->pool, len))) {
/* TODO: unlock mutex */
return NGX_ERROR;
}
b->last += ngx_snprintf((char *) b->last,
/* STUB: should be NGX_PID_T_LEN */
NGX_INT64_LEN + NGX_INT32_LEN,
PID_T_FMT " %4u", ngx_pid, i);
*(b->last++) = ' ';
*(b->last++) = 's';
*(b->last++) = CR; *(b->last++) = LF;
dash = 0;
} else if (!dash) {
len = 3;
if (!(b = ngx_create_temp_buf(ctx->pool, len))) {
/* TODO: unlock mutex */
return NGX_ERROR;
}
*(b->last++) = '-'; *(b->last++) = CR; *(b->last++) = LF;
dash = 1;
} else {
continue;
}
/* TODO: unlock mutex */
if (!(cl = ngx_alloc_chain_link(ctx->pool))) {
return NGX_ERROR;
}
if (ctx->head) {
*ll = cl;
} else {
ctx->head = cl;
}
cl->buf = b;
cl->next = NULL;
ll = &cl->next;
ctx->size += b->last - b->pos;
}
ctx->last = b;
return NGX_OK;
}
static char *ngx_http_set_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_status_handler;
return NGX_CONF_OK;
}
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