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