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577
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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487
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_http.h>
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10
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11
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12 static char *ngx_http_set_status(ngx_conf_t *cf, ngx_command_t *cmd,
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13 void *conf);
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577
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14
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487
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15 static ngx_command_t ngx_http_status_commands[] = {
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16
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17 { ngx_string("stub_status"),
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18 NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
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19 ngx_http_set_status,
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20 0,
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21 0,
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22 NULL },
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23
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24 ngx_null_command
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577
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25 };
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487
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26
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27
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577
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28
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487
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29 ngx_http_module_t ngx_http_stub_status_module_ctx = {
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509
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30 NULL, /* preconfiguration */
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31 NULL, /* postconfiguration */
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487
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32
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33 NULL, /* create main configuration */
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34 NULL, /* init main configuration */
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577
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35
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487
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36 NULL, /* create server configuration */
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37 NULL, /* merge server configuration */
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577
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38
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487
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39 NULL, /* create location configuration */
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40 NULL /* merge location configuration */
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41 };
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42
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43
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44 ngx_module_t ngx_http_stub_status_module = {
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509
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45 NGX_MODULE_V1,
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487
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46 &ngx_http_stub_status_module_ctx, /* module context */
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47 ngx_http_status_commands, /* module directives */
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48 NGX_HTTP_MODULE, /* module type */
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541
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49 NULL, /* init master */
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487
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50 NULL, /* init module */
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541
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51 NULL, /* init process */
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52 NULL, /* init thread */
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53 NULL, /* exit thread */
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54 NULL, /* exit process */
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55 NULL, /* exit master */
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56 NGX_MODULE_V1_PADDING
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487
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57 };
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58
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59
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60 static ngx_int_t ngx_http_status_handler(ngx_http_request_t *r)
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61 {
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495
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62 size_t size;
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63 ngx_int_t rc;
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64 ngx_buf_t *b;
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65 ngx_chain_t out;
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66 ngx_atomic_int_t ap, hn, ac, rq, rd, wr;
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577
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67
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487
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68 if (r->method != NGX_HTTP_GET && r->method != NGX_HTTP_HEAD) {
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69 return NGX_HTTP_NOT_ALLOWED;
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70 }
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71
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72 rc = ngx_http_discard_body(r);
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73
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74 if (rc != NGX_OK && rc != NGX_AGAIN) {
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75 return rc;
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76 }
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77
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509
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78 r->headers_out.content_type.len = sizeof("text/plain") - 1;
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79 r->headers_out.content_type.data = (u_char *) "text/plain";
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487
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80
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81 if (r->method == NGX_HTTP_HEAD) {
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82 r->headers_out.status = NGX_HTTP_OK;
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83
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84 rc = ngx_http_send_header(r);
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85
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86 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
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87 return rc;
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88 }
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89 }
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90
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495
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91 size = sizeof("Active connections: \n") + NGX_ATOMIC_T_LEN
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487
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92 + sizeof("server accepts handled requests\n") - 1
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495
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93 + 6 + 3 * NGX_ATOMIC_T_LEN
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94 + sizeof("Reading: Writing: Waiting: \n") + 3 * NGX_ATOMIC_T_LEN;
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487
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95
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501
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96 b = ngx_create_temp_buf(r->pool, size);
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97 if (b == NULL) {
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487
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98 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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99 }
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100
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101 out.buf = b;
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102 out.next = NULL;
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103
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104 ap = *ngx_stat_accepted;
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495
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105 hn = *ngx_stat_handled;
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487
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106 ac = *ngx_stat_active;
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107 rq = *ngx_stat_requests;
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108 rd = *ngx_stat_reading;
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109 wr = *ngx_stat_writing;
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110
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111 b->last = ngx_sprintf(b->last, "Active connections: %uA \n", ac);
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487
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112
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113 b->last = ngx_cpymem(b->last, "server accepts handled requests\n",
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114 sizeof("server accepts handled requests\n") - 1);
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115
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116 b->last = ngx_sprintf(b->last, " %uA %uA %uA \n", ap, hn, rq);
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487
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117
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118 b->last = ngx_sprintf(b->last, "Reading: %uA Writing: %uA Waiting: %uA \n",
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493
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119 rd, wr, ac - (rd + wr));
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487
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120
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121 r->headers_out.status = NGX_HTTP_OK;
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122 r->headers_out.content_length_n = b->last - b->pos;
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123
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124 b->last_buf = 1;
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125
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126 rc = ngx_http_send_header(r);
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127
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128 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
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129 return rc;
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130 }
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131
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132 return ngx_http_output_filter(r, &out);;
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133 }
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134
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135
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136 static char *ngx_http_set_status(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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137 {
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138 ngx_http_core_loc_conf_t *clcf;
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139
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140 clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
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141 clcf->handler = ngx_http_status_handler;
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142
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143 return NGX_CONF_OK;
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144 }
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