1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
static char *ngx_http_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_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)
{
u_char ch;
size_t len;
ngx_int_t rc;
ngx_uint_t i, dash;
ngx_buf_t *b;
ngx_chain_t out;
ngx_connection_t *c;
ngx_http_request_t *rq;
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;
}
if (!(r->headers_out.content_type =
ngx_http_add_header(&r->headers_out, ngx_http_headers_out)))
{
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;
}
}
len = 0;
dash = 0;
c = ngx_cycle->connections;
for (i = 0; i < ngx_cycle->connection_n; i++) {
rq = c[i].data;
if (rq && rq->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 + c[i].addr_text.len
+ 1 + rq->server_name->len
+ 2; /* "\r\n" */
if (rq->request_line.len) {
len += 1 + rq->request_line.len + 2;
}
dash = 0;
continue;
}
if (!dash) {
len += 3;
dash = 1;
}
}
if (!(b = ngx_create_temp_buf(r->pool, len))) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
dash = 0;
for (i = 0; i < ngx_cycle->connection_n; i++) {
rq = c[i].data;
if (rq && rq->signature == NGX_HTTP_MODULE) {
b->last += ngx_snprintf((char *) b->last,
/* STUB: should be NGX_PID_T_LEN */
NGX_INT64_LEN + NGX_INT32_LEN,
PID_T_FMT " %u", ngx_pid, i);
switch (rq->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);
*(b->last++) = ' ';
b->last = ngx_cpymem(b->last, rq->server_name->data,
rq->server_name->len);
if (rq->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;
continue;
}
if (!dash) {
*(b->last++) = '-'; *(b->last++) = CR; *(b->last++) = LF;
dash = 1;
}
}
r->headers_out.status = NGX_HTTP_OK;
r->headers_out.content_length_n = b->last - b->pos;
rc = ngx_http_send_header(r);
if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
return rc;
}
if (!r->main) {
b->last_buf = 1;
}
out.buf = b;
out.next = NULL;
return ngx_http_output_filter(r, &out);
}
static char *ngx_http_status(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_http_conf_ctx_t *ctx;
ngx_http_core_loc_conf_t *clcf;
ctx = cf->ctx;
clcf = ctx->loc_conf[ngx_http_core_module.ctx_index];
clcf->handler = ngx_http_status_handler;
return NGX_CONF_OK;
}
|
