Json格式的ngx_http_stub_status_module
原版的ngx_http_stub_status_module,查看到的状态信息是一个无格式文本,非常不好解析.
网上有另外一些实现,例如nginx-json-status-module,但实现得极其垃圾,竟然直接调用malloc. 另外为了庆贺一下Nginx 1.0.0版本的发布,我做了一些修改,使其以Json格式返回.
上代码:
/*
* Copyright (C) Igor Sysoev
* Modify by Wendal Chen
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
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("stub_status"),
NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
ngx_http_set_status,
0,
0,
NULL },
ngx_null_command
};
static ngx_http_module_t ngx_http_stub_status_module_ctx = {
NULL, /* 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_int_t ngx_http_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;
if (r->method != NGX_HTTP_GET && r->method != NGX_HTTP_HEAD) {
return NGX_HTTP_NOT_ALLOWED;
}
rc = ngx_http_discard_request_body(r);
if (rc != NGX_OK) {
return rc;
}
ngx_str_set(&r-;>headers_out.content_type, "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;
}
}
size = sizeof("{accepted:,handled:,active:,requests:,reading:,writing:}") + 7 * 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;
b->last = ngx_sprintf(b->last, "{accepted:%uA,handled:%uA,active:%uA,requests:%uA,reading:%uA,writing:%uA}",
ap, hn, ac, rq, rd, wr);
r->headers_out.status = NGX_HTTP_OK;
r->headers_out.content_length_n = b->last - b->pos;
b->last_buf = 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 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;
}
使用方法 1. 直接替换原本的文件 2. 修改一下ngx_string(“stub_status”)为ngx_string(“json_stub_status”),配合一下config文件一起作为额外模块进行编译:
ngx_addon_name=ngx_http_json_stub_status_module
HTTP_AUX_FILTER_MODULES="$HTTP_AUX_FILTER_MODULES ngx_http_json_stub_status_module"
NGX_ADDON_SRCS="$NGX_ADDON_SRCS $ngx_addon_dir/ngx_http_json_stub_status_module.c"
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