Mercurial > hg > nginx-quic
annotate src/http/modules/ngx_http_stub_status_module.c @ 5396:42f874c0b970
Mail: added session close on smtp_greeting_delay violation.
A server MUST send greeting before other replies, while before this
change in case of smtp_greeting_delay violation the 220 greeting was
sent after several 503 replies to commands received before greeting,
resulting in protocol synchronization loss. Moreover, further commands
were accepted after the greeting.
While closing a connection isn't strictly RFC compliant (RFC 5321
requires servers to wait for a QUIT before closing a connection), it's
probably good enough for practial uses.
| author | Maxim Dounin <mdounin@mdounin.ru> |
|---|---|
| date | Mon, 30 Sep 2013 22:09:50 +0400 |
| parents | ee739104d164 |
| children | 2cfc095a607a |
| rev | line source |
|---|---|
| 577 | 1 |
| 2 /* | |
| 3 * Copyright (C) Igor Sysoev | |
| 4412 | 4 * Copyright (C) Nginx, Inc. |
| 577 | 5 */ |
| 6 | |
| 487 | 7 |
| 8 #include <ngx_config.h> | |
| 9 #include <ngx_core.h> | |
| 10 #include <ngx_http.h> | |
| 11 | |
| 12 | |
|
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13 static ngx_int_t ngx_http_stub_status_variable(ngx_http_request_t *r, |
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14 ngx_http_variable_value_t *v, uintptr_t data); |
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15 static ngx_int_t ngx_http_stub_status_add_variables(ngx_conf_t *cf); |
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16 |
| 487 | 17 static char *ngx_http_set_status(ngx_conf_t *cf, ngx_command_t *cmd, |
| 18 void *conf); | |
| 577 | 19 |
| 487 | 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 | |
| 577 | 30 }; |
| 487 | 31 |
| 32 | |
| 577 | 33 |
| 667 | 34 static ngx_http_module_t ngx_http_stub_status_module_ctx = { |
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35 ngx_http_stub_status_add_variables, /* preconfiguration */ |
| 509 | 36 NULL, /* postconfiguration */ |
| 487 | 37 |
| 38 NULL, /* create main configuration */ | |
| 39 NULL, /* init main configuration */ | |
| 577 | 40 |
| 487 | 41 NULL, /* create server configuration */ |
| 42 NULL, /* merge server configuration */ | |
| 577 | 43 |
| 487 | 44 NULL, /* create location configuration */ |
| 45 NULL /* merge location configuration */ | |
| 46 }; | |
| 47 | |
| 48 | |
| 49 ngx_module_t ngx_http_stub_status_module = { | |
| 509 | 50 NGX_MODULE_V1, |
| 487 | 51 &ngx_http_stub_status_module_ctx, /* module context */ |
| 52 ngx_http_status_commands, /* module directives */ | |
| 53 NGX_HTTP_MODULE, /* module type */ | |
| 541 | 54 NULL, /* init master */ |
| 487 | 55 NULL, /* init module */ |
| 541 | 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 | |
| 487 | 62 }; |
| 63 | |
| 64 | |
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65 static ngx_http_variable_t ngx_http_stub_status_vars[] = { |
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66 |
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67 { ngx_string("connections_active"), NULL, ngx_http_stub_status_variable, |
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68 0, NGX_HTTP_VAR_NOCACHEABLE, 0 }, |
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69 |
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70 { ngx_string("connections_reading"), NULL, ngx_http_stub_status_variable, |
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71 1, NGX_HTTP_VAR_NOCACHEABLE, 0 }, |
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72 |
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73 { ngx_string("connections_writing"), NULL, ngx_http_stub_status_variable, |
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74 2, NGX_HTTP_VAR_NOCACHEABLE, 0 }, |
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75 |
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76 { ngx_string("connections_waiting"), NULL, ngx_http_stub_status_variable, |
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77 3, NGX_HTTP_VAR_NOCACHEABLE, 0 }, |
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78 |
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79 { ngx_null_string, NULL, NULL, 0, 0, 0 } |
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80 }; |
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81 |
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82 |
| 487 | 83 static ngx_int_t ngx_http_status_handler(ngx_http_request_t *r) |
| 84 { | |
| 495 | 85 size_t size; |
| 86 ngx_int_t rc; | |
| 87 ngx_buf_t *b; | |
| 88 ngx_chain_t out; | |
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89 ngx_atomic_int_t ap, hn, ac, rq, rd, wr, wa; |
| 577 | 90 |
| 487 | 91 if (r->method != NGX_HTTP_GET && r->method != NGX_HTTP_HEAD) { |
| 92 return NGX_HTTP_NOT_ALLOWED; | |
| 93 } | |
| 94 | |
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95 rc = ngx_http_discard_request_body(r); |
| 487 | 96 |
| 1374 | 97 if (rc != NGX_OK) { |
| 487 | 98 return rc; |
| 99 } | |
| 100 | |
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101 ngx_str_set(&r->headers_out.content_type, "text/plain"); |
| 487 | 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 | |
| 495 | 113 size = sizeof("Active connections: \n") + NGX_ATOMIC_T_LEN |
| 487 | 114 + sizeof("server accepts handled requests\n") - 1 |
| 495 | 115 + 6 + 3 * NGX_ATOMIC_T_LEN |
| 116 + sizeof("Reading: Writing: Waiting: \n") + 3 * NGX_ATOMIC_T_LEN; | |
| 487 | 117 |
| 501 | 118 b = ngx_create_temp_buf(r->pool, size); |
| 119 if (b == NULL) { | |
| 487 | 120 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
| 121 } | |
| 122 | |
| 123 out.buf = b; | |
| 124 out.next = NULL; | |
| 125 | |
| 126 ap = *ngx_stat_accepted; | |
| 495 | 127 hn = *ngx_stat_handled; |
| 487 | 128 ac = *ngx_stat_active; |
| 129 rq = *ngx_stat_requests; | |
| 130 rd = *ngx_stat_reading; | |
| 131 wr = *ngx_stat_writing; | |
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132 wa = *ngx_stat_waiting; |
| 487 | 133 |
| 509 | 134 b->last = ngx_sprintf(b->last, "Active connections: %uA \n", ac); |
| 487 | 135 |
| 136 b->last = ngx_cpymem(b->last, "server accepts handled requests\n", | |
| 137 sizeof("server accepts handled requests\n") - 1); | |
| 138 | |
| 509 | 139 b->last = ngx_sprintf(b->last, " %uA %uA %uA \n", ap, hn, rq); |
| 487 | 140 |
| 509 | 141 b->last = ngx_sprintf(b->last, "Reading: %uA Writing: %uA Waiting: %uA \n", |
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142 rd, wr, wa); |
| 487 | 143 |
| 144 r->headers_out.status = NGX_HTTP_OK; | |
| 145 r->headers_out.content_length_n = b->last - b->pos; | |
| 146 | |
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147 b->last_buf = (r == r->main) ? 1 : 0; |
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148 b->last_in_chain = 1; |
| 487 | 149 |
| 150 rc = ngx_http_send_header(r); | |
| 151 | |
| 152 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) { | |
| 153 return rc; | |
| 154 } | |
| 155 | |
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156 return ngx_http_output_filter(r, &out); |
| 487 | 157 } |
| 158 | |
| 159 | |
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160 static ngx_int_t |
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161 ngx_http_stub_status_variable(ngx_http_request_t *r, |
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162 ngx_http_variable_value_t *v, uintptr_t data) |
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163 { |
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164 u_char *p; |
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165 ngx_atomic_int_t value; |
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166 |
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167 p = ngx_pnalloc(r->pool, NGX_ATOMIC_T_LEN); |
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168 if (p == NULL) { |
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169 return NGX_ERROR; |
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170 } |
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171 |
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172 switch (data) { |
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173 case 0: |
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174 value = *ngx_stat_active; |
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175 break; |
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176 |
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177 case 1: |
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178 value = *ngx_stat_reading; |
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179 break; |
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180 |
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181 case 2: |
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182 value = *ngx_stat_writing; |
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183 break; |
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184 |
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185 case 3: |
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186 value = *ngx_stat_waiting; |
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187 break; |
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188 |
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189 /* suppress warning */ |
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190 default: |
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191 value = 0; |
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192 break; |
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193 } |
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194 |
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195 v->len = ngx_sprintf(p, "%uA", value) - p; |
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196 v->valid = 1; |
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197 v->no_cacheable = 0; |
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198 v->not_found = 0; |
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199 v->data = p; |
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200 |
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201 return NGX_OK; |
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202 } |
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203 |
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204 |
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205 static ngx_int_t |
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206 ngx_http_stub_status_add_variables(ngx_conf_t *cf) |
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207 { |
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208 ngx_http_variable_t *var, *v; |
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209 |
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210 for (v = ngx_http_stub_status_vars; v->name.len; v++) { |
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211 var = ngx_http_add_variable(cf, &v->name, v->flags); |
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212 if (var == NULL) { |
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213 return NGX_ERROR; |
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214 } |
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215 |
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216 var->get_handler = v->get_handler; |
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217 var->data = v->data; |
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218 } |
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219 |
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220 return NGX_OK; |
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221 } |
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222 |
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223 |
| 487 | 224 static char *ngx_http_set_status(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
| 225 { | |
| 226 ngx_http_core_loc_conf_t *clcf; | |
| 227 | |
| 228 clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module); | |
| 229 clcf->handler = ngx_http_status_handler; | |
| 230 | |
| 231 return NGX_CONF_OK; | |
| 232 } |