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126
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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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36
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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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126
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14
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36
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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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126
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25 };
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36
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26
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27
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126
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28
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216
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29 static ngx_http_module_t ngx_http_stub_status_module_ctx = {
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58
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30 NULL, /* preconfiguration */
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31 NULL, /* postconfiguration */
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36
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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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126
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35
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36
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36 NULL, /* create server configuration */
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37 NULL, /* merge server configuration */
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126
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38
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36
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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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58
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45 NGX_MODULE_V1,
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36
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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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90
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49 NULL, /* init master */
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36
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50 NULL, /* init module */
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90
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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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36
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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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44
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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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126
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67
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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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326
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72 rc = ngx_http_discard_request_body(r);
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36
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73
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326
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74 if (rc != NGX_OK) {
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36
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75 return rc;
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76 }
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77
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570
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78 ngx_str_set(&r->headers_out.content_type, "text/plain");
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36
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79
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80 if (r->method == NGX_HTTP_HEAD) {
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81 r->headers_out.status = NGX_HTTP_OK;
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82
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83 rc = ngx_http_send_header(r);
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84
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85 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
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86 return rc;
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87 }
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88 }
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89
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44
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90 size = sizeof("Active connections: \n") + NGX_ATOMIC_T_LEN
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91 + sizeof("server accepts handled requests\n") - 1
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44
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92 + 6 + 3 * NGX_ATOMIC_T_LEN
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93 + sizeof("Reading: Writing: Waiting: \n") + 3 * NGX_ATOMIC_T_LEN;
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36
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94
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50
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95 b = ngx_create_temp_buf(r->pool, size);
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96 if (b == NULL) {
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36
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97 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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98 }
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99
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100 out.buf = b;
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101 out.next = NULL;
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102
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103 ap = *ngx_stat_accepted;
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44
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104 hn = *ngx_stat_handled;
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105 ac = *ngx_stat_active;
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106 rq = *ngx_stat_requests;
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107 rd = *ngx_stat_reading;
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108 wr = *ngx_stat_writing;
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109
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110 b->last = ngx_sprintf(b->last, "Active connections: %uA \n", ac);
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36
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111
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112 b->last = ngx_cpymem(b->last, "server accepts handled requests\n",
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113 sizeof("server accepts handled requests\n") - 1);
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114
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115 b->last = ngx_sprintf(b->last, " %uA %uA %uA \n", ap, hn, rq);
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36
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116
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58
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117 b->last = ngx_sprintf(b->last, "Reading: %uA Writing: %uA Waiting: %uA \n",
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42
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118 rd, wr, ac - (rd + wr));
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36
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119
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120 r->headers_out.status = NGX_HTTP_OK;
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121 r->headers_out.content_length_n = b->last - b->pos;
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122
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123 b->last_buf = 1;
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124
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125 rc = ngx_http_send_header(r);
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126
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127 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
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128 return rc;
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129 }
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130
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340
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131 return ngx_http_output_filter(r, &out);
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36
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132 }
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133
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134
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135 static char *ngx_http_set_status(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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136 {
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137 ngx_http_core_loc_conf_t *clcf;
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138
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139 clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
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140 clcf->handler = ngx_http_status_handler;
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141
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142 return NGX_CONF_OK;
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143 }
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