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1.1 misho 1:
2: /*
3: * Copyright (C) Igor Sysoev
4: * Copyright (C) Nginx, Inc.
5: */
6:
7:
8: #include <ngx_config.h>
9: #include <ngx_core.h>
10: #include <ngx_http.h>
11:
12:
13: static ngx_int_t ngx_http_stub_status_variable(ngx_http_request_t *r,
14: ngx_http_variable_value_t *v, uintptr_t data);
15: static ngx_int_t ngx_http_stub_status_add_variables(ngx_conf_t *cf);
16:
17: static char *ngx_http_set_status(ngx_conf_t *cf, ngx_command_t *cmd,
18: void *conf);
19:
20: static ngx_command_t ngx_http_status_commands[] = {
21:
22: { ngx_string("stub_status"),
23: NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
24: ngx_http_set_status,
25: 0,
26: 0,
27: NULL },
28:
29: ngx_null_command
30: };
31:
32:
33:
34: static ngx_http_module_t ngx_http_stub_status_module_ctx = {
35: ngx_http_stub_status_add_variables, /* preconfiguration */
36: NULL, /* postconfiguration */
37:
38: NULL, /* create main configuration */
39: NULL, /* init main configuration */
40:
41: NULL, /* create server configuration */
42: NULL, /* merge server configuration */
43:
44: NULL, /* create location configuration */
45: NULL /* merge location configuration */
46: };
47:
48:
49: ngx_module_t ngx_http_stub_status_module = {
50: NGX_MODULE_V1,
51: &ngx_http_stub_status_module_ctx, /* module context */
52: ngx_http_status_commands, /* module directives */
53: NGX_HTTP_MODULE, /* module type */
54: NULL, /* init master */
55: NULL, /* init module */
56: NULL, /* init process */
57: NULL, /* init thread */
58: NULL, /* exit thread */
59: NULL, /* exit process */
60: NULL, /* exit master */
61: NGX_MODULE_V1_PADDING
62: };
63:
64:
65: static ngx_http_variable_t ngx_http_stub_status_vars[] = {
66:
67: { ngx_string("connections_active"), NULL, ngx_http_stub_status_variable,
68: 0, NGX_HTTP_VAR_NOCACHEABLE, 0 },
69:
70: { ngx_string("connections_reading"), NULL, ngx_http_stub_status_variable,
71: 1, NGX_HTTP_VAR_NOCACHEABLE, 0 },
72:
73: { ngx_string("connections_writing"), NULL, ngx_http_stub_status_variable,
74: 2, NGX_HTTP_VAR_NOCACHEABLE, 0 },
75:
76: { ngx_string("connections_waiting"), NULL, ngx_http_stub_status_variable,
77: 3, NGX_HTTP_VAR_NOCACHEABLE, 0 },
78:
79: { ngx_null_string, NULL, NULL, 0, 0, 0 }
80: };
81:
82:
83: static ngx_int_t ngx_http_status_handler(ngx_http_request_t *r)
84: {
85: size_t size;
86: ngx_int_t rc;
87: ngx_buf_t *b;
88: ngx_chain_t out;
89: ngx_atomic_int_t ap, hn, ac, rq, rd, wr, wa;
90:
91: if (r->method != NGX_HTTP_GET && r->method != NGX_HTTP_HEAD) {
92: return NGX_HTTP_NOT_ALLOWED;
93: }
94:
95: rc = ngx_http_discard_request_body(r);
96:
97: if (rc != NGX_OK) {
98: return rc;
99: }
100:
101: ngx_str_set(&r->headers_out.content_type, "text/plain");
102:
103: if (r->method == NGX_HTTP_HEAD) {
104: r->headers_out.status = NGX_HTTP_OK;
105:
106: rc = ngx_http_send_header(r);
107:
108: if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
109: return rc;
110: }
111: }
112:
113: size = sizeof("Active connections: \n") + NGX_ATOMIC_T_LEN
114: + sizeof("server accepts handled requests\n") - 1
115: + 6 + 3 * NGX_ATOMIC_T_LEN
116: + sizeof("Reading: Writing: Waiting: \n") + 3 * NGX_ATOMIC_T_LEN;
117:
118: b = ngx_create_temp_buf(r->pool, size);
119: if (b == NULL) {
120: return NGX_HTTP_INTERNAL_SERVER_ERROR;
121: }
122:
123: out.buf = b;
124: out.next = NULL;
125:
126: ap = *ngx_stat_accepted;
127: hn = *ngx_stat_handled;
128: ac = *ngx_stat_active;
129: rq = *ngx_stat_requests;
130: rd = *ngx_stat_reading;
131: wr = *ngx_stat_writing;
132: wa = *ngx_stat_waiting;
133:
134: b->last = ngx_sprintf(b->last, "Active connections: %uA \n", ac);
135:
136: b->last = ngx_cpymem(b->last, "server accepts handled requests\n",
137: sizeof("server accepts handled requests\n") - 1);
138:
139: b->last = ngx_sprintf(b->last, " %uA %uA %uA \n", ap, hn, rq);
140:
141: b->last = ngx_sprintf(b->last, "Reading: %uA Writing: %uA Waiting: %uA \n",
142: rd, wr, wa);
143:
144: r->headers_out.status = NGX_HTTP_OK;
145: r->headers_out.content_length_n = b->last - b->pos;
146:
147: b->last_buf = (r == r->main) ? 1 : 0;
148:
149: rc = ngx_http_send_header(r);
150:
151: if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
152: return rc;
153: }
154:
155: return ngx_http_output_filter(r, &out);
156: }
157:
158:
159: static ngx_int_t
160: ngx_http_stub_status_variable(ngx_http_request_t *r,
161: ngx_http_variable_value_t *v, uintptr_t data)
162: {
163: u_char *p;
164: ngx_atomic_int_t value;
165:
166: p = ngx_pnalloc(r->pool, NGX_ATOMIC_T_LEN);
167: if (p == NULL) {
168: return NGX_ERROR;
169: }
170:
171: switch (data) {
172: case 0:
173: value = *ngx_stat_active;
174: break;
175:
176: case 1:
177: value = *ngx_stat_reading;
178: break;
179:
180: case 2:
181: value = *ngx_stat_writing;
182: break;
183:
184: case 3:
185: value = *ngx_stat_waiting;
186: break;
187:
188: /* suppress warning */
189: default:
190: value = 0;
191: break;
192: }
193:
194: v->len = ngx_sprintf(p, "%uA", value) - p;
195: v->valid = 1;
196: v->no_cacheable = 0;
197: v->not_found = 0;
198: v->data = p;
199:
200: return NGX_OK;
201: }
202:
203:
204: static ngx_int_t
205: ngx_http_stub_status_add_variables(ngx_conf_t *cf)
206: {
207: ngx_http_variable_t *var, *v;
208:
209: for (v = ngx_http_stub_status_vars; v->name.len; v++) {
210: var = ngx_http_add_variable(cf, &v->name, v->flags);
211: if (var == NULL) {
212: return NGX_ERROR;
213: }
214:
215: var->get_handler = v->get_handler;
216: var->data = v->data;
217: }
218:
219: return NGX_OK;
220: }
221:
222:
223: static char *ngx_http_set_status(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
224: {
225: ngx_http_core_loc_conf_t *clcf;
226:
227: clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
228: clcf->handler = ngx_http_status_handler;
229:
230: return NGX_CONF_OK;
231: }