1 #include "first.h" 2 3 #include <string.h> 4 #include <stdlib.h> 5 6 #include "gw_backend.h" 7 #include "base.h" 8 #include "array.h" 9 #include "buffer.h" 10 #include "fdevent.h" 11 #include "http_kv.h" 12 #include "http_header.h" 13 #include "log.h" 14 #include "sock_addr.h" 15 #include "status_counter.h" 16 17 /** 18 * 19 * HTTP reverse proxy 20 * 21 * TODO: - HTTP/1.1 22 * - HTTP/1.1 persistent connection with upstream servers 23 */ 24 25 /* (future: might split struct and move part to http-header-glue.c) */ 26 typedef struct http_header_remap_opts { 27 const array *urlpaths; 28 const array *hosts_request; 29 const array *hosts_response; 30 int force_http10; 31 int https_remap; 32 int upgrade; 33 int connect_method; 34 /*(not used in plugin_config, but used in handler_ctx)*/ 35 const buffer *http_host; 36 const buffer *forwarded_host; 37 const data_string *forwarded_urlpath; 38 } http_header_remap_opts; 39 40 typedef enum { 41 PROXY_FORWARDED_NONE = 0x00, 42 PROXY_FORWARDED_FOR = 0x01, 43 PROXY_FORWARDED_PROTO = 0x02, 44 PROXY_FORWARDED_HOST = 0x04, 45 PROXY_FORWARDED_BY = 0x08, 46 PROXY_FORWARDED_REMOTE_USER = 0x10 47 } proxy_forwarded_t; 48 49 typedef struct { 50 gw_plugin_config gw; /* start must match layout of gw_plugin_config */ 51 unsigned int replace_http_host; 52 unsigned int forwarded; 53 http_header_remap_opts header; 54 } plugin_config; 55 56 typedef struct { 57 PLUGIN_DATA; 58 pid_t srv_pid; /* must match layout of gw_plugin_data through conf member */ 59 plugin_config conf; 60 plugin_config defaults; 61 } plugin_data; 62 63 static int proxy_check_extforward; 64 65 typedef struct { 66 gw_handler_ctx gw; 67 http_response_opts opts; 68 plugin_config conf; 69 } handler_ctx; 70 71 72 INIT_FUNC(mod_proxy_init) { 73 return calloc(1, sizeof(plugin_data)); 74 } 75 76 77 static void mod_proxy_free_config(plugin_data * const p) 78 { 79 if (NULL == p->cvlist) return; 80 /* (init i to 0 if global context; to 1 to skip empty global context) */ 81 for (int i = !p->cvlist[0].v.u2[1], used = p->nconfig; i < used; ++i) { 82 config_plugin_value_t *cpv = p->cvlist + p->cvlist[i].v.u2[0]; 83 for (; -1 != cpv->k_id; ++cpv) { 84 switch (cpv->k_id) { 85 case 5: /* proxy.header */ 86 if (cpv->vtype == T_CONFIG_LOCAL) free(cpv->v.v); 87 break; 88 default: 89 break; 90 } 91 } 92 } 93 } 94 95 96 FREE_FUNC(mod_proxy_free) { 97 plugin_data * const p = p_d; 98 mod_proxy_free_config(p); 99 gw_free(p); 100 } 101 102 static void mod_proxy_merge_config_cpv(plugin_config * const pconf, const config_plugin_value_t * const cpv) 103 { 104 switch (cpv->k_id) { /* index into static config_plugin_keys_t cpk[] */ 105 case 0: /* proxy.server */ 106 if (cpv->vtype == T_CONFIG_LOCAL) { 107 gw_plugin_config * const gw = cpv->v.v; 108 pconf->gw.exts = gw->exts; 109 pconf->gw.exts_auth = gw->exts_auth; 110 pconf->gw.exts_resp = gw->exts_resp; 111 } 112 break; 113 case 1: /* proxy.balance */ 114 /*if (cpv->vtype == T_CONFIG_LOCAL)*//*always true here for this param*/ 115 pconf->gw.balance = (int)cpv->v.u; 116 break; 117 case 2: /* proxy.debug */ 118 pconf->gw.debug = (int)cpv->v.u; 119 break; 120 case 3: /* proxy.map-extensions */ 121 pconf->gw.ext_mapping = cpv->v.a; 122 break; 123 case 4: /* proxy.forwarded */ 124 /*if (cpv->vtype == T_CONFIG_LOCAL)*//*always true here for this param*/ 125 pconf->forwarded = cpv->v.u; 126 break; 127 case 5: /* proxy.header */ 128 /*if (cpv->vtype == T_CONFIG_LOCAL)*//*always true here for this param*/ 129 pconf->header = *(http_header_remap_opts *)cpv->v.v; /*(copies struct)*/ 130 break; 131 case 6: /* proxy.replace-http-host */ 132 pconf->replace_http_host = cpv->v.u; 133 break; 134 default:/* should not happen */ 135 return; 136 } 137 } 138 139 140 static void mod_proxy_merge_config(plugin_config * const pconf, const config_plugin_value_t *cpv) 141 { 142 do { 143 mod_proxy_merge_config_cpv(pconf, cpv); 144 } while ((++cpv)->k_id != -1); 145 } 146 147 148 static void mod_proxy_patch_config(request_st * const r, plugin_data * const p) 149 { 150 memcpy(&p->conf, &p->defaults, sizeof(plugin_config)); 151 for (int i = 1, used = p->nconfig; i < used; ++i) { 152 if (config_check_cond(r, (uint32_t)p->cvlist[i].k_id)) 153 mod_proxy_merge_config(&p->conf, p->cvlist+p->cvlist[i].v.u2[0]); 154 } 155 } 156 157 158 static unsigned int mod_proxy_parse_forwarded(server *srv, const array *a) 159 { 160 unsigned int forwarded = 0; 161 for (uint32_t j = 0, used = a->used; j < used; ++j) { 162 proxy_forwarded_t param; 163 data_unset *du = a->data[j]; 164 if (buffer_eq_slen(&du->key, CONST_STR_LEN("by"))) 165 param = PROXY_FORWARDED_BY; 166 else if (buffer_eq_slen(&du->key, CONST_STR_LEN("for"))) 167 param = PROXY_FORWARDED_FOR; 168 else if (buffer_eq_slen(&du->key, CONST_STR_LEN("host"))) 169 param = PROXY_FORWARDED_HOST; 170 else if (buffer_eq_slen(&du->key, CONST_STR_LEN("proto"))) 171 param = PROXY_FORWARDED_PROTO; 172 else if (buffer_eq_slen(&du->key, CONST_STR_LEN("remote_user"))) 173 param = PROXY_FORWARDED_REMOTE_USER; 174 else { 175 log_error(srv->errh, __FILE__, __LINE__, 176 "proxy.forwarded keys must be one of: " 177 "by, for, host, proto, remote_user, but not: %s", du->key.ptr); 178 return UINT_MAX; 179 } 180 int val = config_plugin_value_tobool(du, 2); 181 if (2 == val) { 182 log_error(srv->errh, __FILE__, __LINE__, 183 "proxy.forwarded values must be one of: " 184 "0, 1, enable, disable; error for key: %s", du->key.ptr); 185 return UINT_MAX; 186 } 187 if (val) 188 forwarded |= param; 189 } 190 return forwarded; 191 } 192 193 194 static http_header_remap_opts * mod_proxy_parse_header_opts(server *srv, const array *a) 195 { 196 http_header_remap_opts header; 197 memset(&header, 0, sizeof(header)); 198 for (uint32_t j = 0, used = a->used; j < used; ++j) { 199 data_array *da = (data_array *)a->data[j]; 200 if (buffer_eq_slen(&da->key, CONST_STR_LEN("https-remap"))) { 201 int val = config_plugin_value_tobool((data_unset *)da, 2); 202 if (2 == val) { 203 log_error(srv->errh, __FILE__, __LINE__, 204 "unexpected value for proxy.header; " 205 "expected \"https-remap\" => \"enable\" or \"disable\""); 206 return NULL; 207 } 208 header.https_remap = val; 209 continue; 210 } 211 else if (buffer_eq_slen(&da->key, CONST_STR_LEN("force-http10"))) { 212 int val = config_plugin_value_tobool((data_unset *)da, 2); 213 if (2 == val) { 214 log_error(srv->errh, __FILE__, __LINE__, 215 "unexpected value for proxy.header; " 216 "expected \"force-http10\" => \"enable\" or \"disable\""); 217 return NULL; 218 } 219 header.force_http10 = val; 220 continue; 221 } 222 else if (buffer_eq_slen(&da->key, CONST_STR_LEN("upgrade"))) { 223 int val = config_plugin_value_tobool((data_unset *)da, 2); 224 if (2 == val) { 225 log_error(srv->errh, __FILE__, __LINE__, 226 "unexpected value for proxy.header; " 227 "expected \"upgrade\" => \"enable\" or \"disable\""); 228 return NULL; 229 } 230 header.upgrade = val; 231 continue; 232 } 233 else if (buffer_eq_slen(&da->key, CONST_STR_LEN("connect"))) { 234 int val = config_plugin_value_tobool((data_unset *)da, 2); 235 if (2 == val) { 236 log_error(srv->errh, __FILE__, __LINE__, 237 "unexpected value for proxy.header; " 238 "expected \"connect\" => \"enable\" or \"disable\""); 239 return NULL; 240 } 241 header.connect_method = val; 242 continue; 243 } 244 if (da->type != TYPE_ARRAY || !array_is_kvstring(&da->value)) { 245 log_error(srv->errh, __FILE__, __LINE__, 246 "unexpected value for proxy.header; " 247 "expected ( \"param\" => ( \"key\" => \"value\" ) ) near key %s", 248 da->key.ptr); 249 return NULL; 250 } 251 if (buffer_eq_slen(&da->key, CONST_STR_LEN("map-urlpath"))) { 252 header.urlpaths = &da->value; 253 } 254 else if (buffer_eq_slen(&da->key, CONST_STR_LEN("map-host-request"))) { 255 header.hosts_request = &da->value; 256 } 257 else if (buffer_eq_slen(&da->key, CONST_STR_LEN("map-host-response"))) { 258 header.hosts_response = &da->value; 259 } 260 else { 261 log_error(srv->errh, __FILE__, __LINE__, 262 "unexpected key for proxy.header; " 263 "expected ( \"param\" => ( \"key\" => \"value\" ) ) near key %s", 264 da->key.ptr); 265 return NULL; 266 } 267 } 268 269 http_header_remap_opts *opts = malloc(sizeof(header)); 270 force_assert(opts); 271 memcpy(opts, &header, sizeof(header)); 272 return opts; 273 } 274 275 276 SETDEFAULTS_FUNC(mod_proxy_set_defaults) 277 { 278 static const config_plugin_keys_t cpk[] = { 279 { CONST_STR_LEN("proxy.server"), 280 T_CONFIG_ARRAY_KVARRAY, 281 T_CONFIG_SCOPE_CONNECTION } 282 ,{ CONST_STR_LEN("proxy.balance"), 283 T_CONFIG_STRING, 284 T_CONFIG_SCOPE_CONNECTION } 285 ,{ CONST_STR_LEN("proxy.debug"), 286 T_CONFIG_INT, 287 T_CONFIG_SCOPE_CONNECTION } 288 ,{ CONST_STR_LEN("proxy.map-extensions"), 289 T_CONFIG_ARRAY_KVSTRING, 290 T_CONFIG_SCOPE_CONNECTION } 291 ,{ CONST_STR_LEN("proxy.forwarded"), 292 T_CONFIG_ARRAY_KVANY, 293 T_CONFIG_SCOPE_CONNECTION } 294 ,{ CONST_STR_LEN("proxy.header"), 295 T_CONFIG_ARRAY_KVANY, 296 T_CONFIG_SCOPE_CONNECTION } 297 ,{ CONST_STR_LEN("proxy.replace-http-host"), 298 T_CONFIG_BOOL, 299 T_CONFIG_SCOPE_CONNECTION } 300 ,{ NULL, 0, 301 T_CONFIG_UNSET, 302 T_CONFIG_SCOPE_UNSET } 303 }; 304 305 plugin_data * const p = p_d; 306 if (!config_plugin_values_init(srv, p, cpk, "mod_proxy")) 307 return HANDLER_ERROR; 308 309 /* process and validate config directives 310 * (init i to 0 if global context; to 1 to skip empty global context) */ 311 for (int i = !p->cvlist[0].v.u2[1]; i < p->nconfig; ++i) { 312 config_plugin_value_t *cpv = p->cvlist + p->cvlist[i].v.u2[0]; 313 gw_plugin_config *gw = NULL; 314 for (; -1 != cpv->k_id; ++cpv) { 315 switch (cpv->k_id) { 316 case 0: /* proxy.server */ 317 gw = calloc(1, sizeof(gw_plugin_config)); 318 force_assert(gw); 319 if (!gw_set_defaults_backend(srv, (gw_plugin_data *)p, cpv->v.a, 320 gw, 0, cpk[cpv->k_id].k)) { 321 gw_plugin_config_free(gw); 322 return HANDLER_ERROR; 323 } 324 /* error if "mode" = "authorizer"; 325 * proxy can not act as authorizer */ 326 /*(check after gw_set_defaults_backend())*/ 327 if (gw->exts_auth && gw->exts_auth->used) { 328 log_error(srv->errh, __FILE__, __LINE__, 329 "%s must not define any hosts with " 330 "attribute \"mode\" = \"authorizer\"", cpk[cpv->k_id].k); 331 gw_plugin_config_free(gw); 332 return HANDLER_ERROR; 333 } 334 cpv->v.v = gw; 335 cpv->vtype = T_CONFIG_LOCAL; 336 break; 337 case 1: /* proxy.balance */ 338 cpv->v.u = (unsigned int)gw_get_defaults_balance(srv, cpv->v.b); 339 break; 340 case 2: /* proxy.debug */ 341 case 3: /* proxy.map-extensions */ 342 break; 343 case 4: /* proxy.forwarded */ 344 cpv->v.u = mod_proxy_parse_forwarded(srv, cpv->v.a); 345 if (UINT_MAX == cpv->v.u) return HANDLER_ERROR; 346 cpv->vtype = T_CONFIG_LOCAL; 347 break; 348 case 5: /* proxy.header */ 349 cpv->v.v = mod_proxy_parse_header_opts(srv, cpv->v.a); 350 if (NULL == cpv->v.v) return HANDLER_ERROR; 351 cpv->vtype = T_CONFIG_LOCAL; 352 break; 353 case 6: /* proxy.replace-http-host */ 354 break; 355 default:/* should not happen */ 356 break; 357 } 358 } 359 360 /* disable check-local for all exts (default enabled) */ 361 if (gw && gw->exts) { /*(check after gw_set_defaults_backend())*/ 362 gw_exts_clear_check_local(gw->exts); 363 } 364 } 365 366 /* default is 0 */ 367 /*p->defaults.balance = (unsigned int)gw_get_defaults_balance(srv, NULL);*/ 368 369 p->defaults.header.force_http10 = 370 srv->srvconf.feature_flags 371 && config_plugin_value_tobool( 372 array_get_element_klen(srv->srvconf.feature_flags, 373 CONST_STR_LEN("proxy.force-http10")), 0); 374 375 /* initialize p->defaults from global config context */ 376 if (p->nconfig > 0 && p->cvlist->v.u2[1]) { 377 const config_plugin_value_t *cpv = p->cvlist + p->cvlist->v.u2[0]; 378 if (-1 != cpv->k_id) 379 mod_proxy_merge_config(&p->defaults, cpv); 380 } 381 382 /* special-case behavior if mod_extforward is loaded */ 383 for (uint32_t i = 0; i < srv->srvconf.modules->used; ++i) { 384 buffer *m = &((data_string *)srv->srvconf.modules->data[i])->value; 385 if (buffer_eq_slen(m, CONST_STR_LEN("mod_extforward"))) { 386 proxy_check_extforward = 1; 387 break; 388 } 389 } 390 391 return HANDLER_GO_ON; 392 } 393 394 395 /* (future: might move to http-header-glue.c) */ 396 static const buffer * http_header_remap_host_match (buffer *b, size_t off, http_header_remap_opts *remap_hdrs, int is_req, size_t alen) 397 { 398 const array *hosts = is_req 399 ? remap_hdrs->hosts_request 400 : remap_hdrs->hosts_response; 401 if (hosts) { 402 const char * const s = b->ptr+off; 403 for (size_t i = 0, used = hosts->used; i < used; ++i) { 404 const data_string * const ds = (data_string *)hosts->data[i]; 405 const buffer *k = &ds->key; 406 size_t mlen = buffer_clen(k); 407 if (1 == mlen && k->ptr[0] == '-') { 408 /* match with authority provided in Host (if is_req) 409 * (If no Host in client request, then matching against empty 410 * string will probably not match, and no remap will be 411 * performed) */ 412 k = is_req 413 ? remap_hdrs->http_host 414 : remap_hdrs->forwarded_host; 415 if (NULL == k) continue; 416 mlen = buffer_clen(k); 417 } 418 if (buffer_eq_icase_ss(s, alen, k->ptr, mlen)) { 419 if (buffer_is_equal_string(&ds->value, CONST_STR_LEN("-"))) { 420 return remap_hdrs->http_host; 421 } 422 else if (!buffer_is_blank(&ds->value)) { 423 /*(save first matched request host for response match)*/ 424 if (is_req && NULL == remap_hdrs->forwarded_host) 425 remap_hdrs->forwarded_host = &ds->value; 426 return &ds->value; 427 } /*(else leave authority as-is and stop matching)*/ 428 break; 429 } 430 } 431 } 432 return NULL; 433 } 434 435 436 /* (future: might move to http-header-glue.c) */ 437 static size_t http_header_remap_host (buffer *b, size_t off, http_header_remap_opts *remap_hdrs, int is_req, size_t alen) 438 { 439 const buffer * const m = 440 http_header_remap_host_match(b, off, remap_hdrs, is_req, alen); 441 if (NULL == m) return alen; /*(no match; return original authority length)*/ 442 443 buffer_substr_replace(b, off, alen, m); 444 return buffer_clen(m); /*(length of replacement authority)*/ 445 } 446 447 448 /* (future: might move to http-header-glue.c) */ 449 static size_t http_header_remap_urlpath (buffer *b, size_t off, http_header_remap_opts *remap_hdrs, int is_req) 450 { 451 const array *urlpaths = remap_hdrs->urlpaths; 452 if (urlpaths) { 453 const char * const s = b->ptr+off; 454 const size_t plen = buffer_clen(b) - off; /*(urlpath len)*/ 455 if (is_req) { /* request */ 456 for (size_t i = 0, used = urlpaths->used; i < used; ++i) { 457 const data_string * const ds = (data_string *)urlpaths->data[i]; 458 const size_t mlen = buffer_clen(&ds->key); 459 if (mlen <= plen && 0 == memcmp(s, ds->key.ptr, mlen)) { 460 if (NULL == remap_hdrs->forwarded_urlpath) 461 remap_hdrs->forwarded_urlpath = ds; 462 buffer_substr_replace(b, off, mlen, &ds->value); 463 return buffer_clen(&ds->value);/*(replacement len)*/ 464 } 465 } 466 } 467 else { /* response; perform reverse map */ 468 if (NULL != remap_hdrs->forwarded_urlpath) { 469 const data_string * const ds = remap_hdrs->forwarded_urlpath; 470 const size_t mlen = buffer_clen(&ds->value); 471 if (mlen <= plen && 0 == memcmp(s, ds->value.ptr, mlen)) { 472 buffer_substr_replace(b, off, mlen, &ds->key); 473 return buffer_clen(&ds->key); /*(replacement len)*/ 474 } 475 } 476 for (size_t i = 0, used = urlpaths->used; i < used; ++i) { 477 const data_string * const ds = (data_string *)urlpaths->data[i]; 478 const size_t mlen = buffer_clen(&ds->value); 479 if (mlen <= plen && 0 == memcmp(s, ds->value.ptr, mlen)) { 480 buffer_substr_replace(b, off, mlen, &ds->key); 481 return buffer_clen(&ds->key); /*(replacement len)*/ 482 } 483 } 484 } 485 } 486 return 0; 487 } 488 489 490 /* (future: might move to http-header-glue.c) */ 491 static void http_header_remap_uri (buffer *b, size_t off, http_header_remap_opts *remap_hdrs, int is_req) 492 { 493 /* find beginning of URL-path (might be preceded by scheme://authority 494 * (caller should make sure any leading whitespace is prior to offset) */ 495 if (b->ptr[off] != '/') { 496 char *s = b->ptr+off; 497 size_t alen; /*(authority len (host len))*/ 498 size_t slen; /*(scheme len)*/ 499 const buffer *m; 500 /* skip over scheme and authority of URI to find beginning of URL-path 501 * (value might conceivably be relative URL-path instead of URI) */ 502 if (NULL == (s = strchr(s, ':')) || s[1] != '/' || s[2] != '/') return; 503 slen = s - (b->ptr+off); 504 s += 3; 505 off = (size_t)(s - b->ptr); 506 if (NULL != (s = strchr(s, '/'))) { 507 alen = (size_t)(s - b->ptr) - off; 508 if (0 == alen) return; /*(empty authority, e.g. "http:///")*/ 509 } 510 else { 511 alen = buffer_clen(b) - off; 512 if (0 == alen) return; /*(empty authority, e.g. "http:///")*/ 513 buffer_append_string_len(b, CONST_STR_LEN("/")); 514 } 515 516 /* remap authority (if configured) and set offset to url-path */ 517 m = http_header_remap_host_match(b, off, remap_hdrs, is_req, alen); 518 if (NULL != m) { 519 if (remap_hdrs->https_remap 520 && (is_req ? 5==slen && 0==memcmp(b->ptr+off-slen-3,"https",5) 521 : 4==slen && 0==memcmp(b->ptr+off-slen-3,"http",4))){ 522 if (is_req) { 523 memcpy(b->ptr+off-slen-3+4,"://",3); /*("https"=>"http")*/ 524 --off; 525 ++alen; 526 } 527 else {/*(!is_req)*/ 528 memcpy(b->ptr+off-slen-3+4,"s://",4); /*("http" =>"https")*/ 529 ++off; 530 --alen; 531 } 532 } 533 buffer_substr_replace(b, off, alen, m); 534 alen = buffer_clen(m);/*(length of replacement authority)*/ 535 } 536 off += alen; 537 } 538 539 /* remap URLs (if configured) */ 540 http_header_remap_urlpath(b, off, remap_hdrs, is_req); 541 } 542 543 544 /* (future: might move to http-header-glue.c) */ 545 static void http_header_remap_setcookie (buffer *b, size_t off, http_header_remap_opts *remap_hdrs) 546 { 547 /* Given the special-case of Set-Cookie and the (too) loosely restricted 548 * characters allowed, for best results, the Set-Cookie value should be the 549 * entire string in b from offset to end of string. In response headers, 550 * lighttpd may concatenate multiple Set-Cookie headers into single entry 551 * in r->resp_headers, separated by "\r\nSet-Cookie: " */ 552 for (char *s = b->ptr+off, *e; *s; s = e) { 553 size_t len; 554 { 555 while (*s != ';' && *s != '\n' && *s != '\0') ++s; 556 if (*s == '\n') { 557 /*(include +1 for '\n', but leave ' ' for ++s below)*/ 558 s += sizeof("Set-Cookie:"); 559 } 560 if ('\0' == *s) return; 561 do { ++s; } while (*s == ' ' || *s == '\t'); 562 if ('\0' == *s) return; 563 e = s+1; 564 if ('=' == *s) continue; 565 /*(interested only in Domain and Path attributes)*/ 566 while (*e != '=' && *e != '\0') ++e; 567 if ('\0' == *e) return; 568 ++e; 569 switch ((int)(e - s - 1)) { 570 case 4: 571 if (buffer_eq_icase_ssn(s, "path", 4)) { 572 if (*e == '"') ++e; 573 if (*e != '/') continue; 574 off = (size_t)(e - b->ptr); 575 len = http_header_remap_urlpath(b, off, remap_hdrs, 0); 576 e = b->ptr+off+len; /*(b may have been reallocated)*/ 577 continue; 578 } 579 break; 580 case 6: 581 if (buffer_eq_icase_ssn(s, "domain", 6)) { 582 size_t alen = 0; 583 if (*e == '"') ++e; 584 if (*e == '.') ++e; 585 if (*e == ';') continue; 586 off = (size_t)(e - b->ptr); 587 for (char c; (c = e[alen]) != ';' && c != ' ' && c != '\t' 588 && c != '\r' && c != '\0'; ++alen); 589 len = http_header_remap_host(b, off, remap_hdrs, 0, alen); 590 e = b->ptr+off+len; /*(b may have been reallocated)*/ 591 continue; 592 } 593 break; 594 default: 595 break; 596 } 597 } 598 } 599 } 600 601 602 static void buffer_append_string_backslash_escaped(buffer *b, const char *s, size_t len) { 603 /* (future: might move to buffer.c) */ 604 size_t j = 0; 605 char * const p = buffer_string_prepare_append(b, len*2 + 4); 606 607 for (size_t i = 0; i < len; ++i) { 608 int c = s[i]; 609 if (c == '"' || c == '\\' || c == 0x7F || (c < 0x20 && c != '\t')) 610 p[j++] = '\\'; 611 p[j++] = c; 612 } 613 614 buffer_commit(b, j); 615 } 616 617 static void proxy_set_Forwarded(connection * const con, request_st * const r, const unsigned int flags) { 618 buffer *b = NULL, *efor = NULL, *eproto = NULL, *ehost = NULL; 619 int semicolon = 0; 620 621 if (proxy_check_extforward) { 622 efor = 623 http_header_env_get(r, CONST_STR_LEN("_L_EXTFORWARD_ACTUAL_FOR")); 624 eproto = 625 http_header_env_get(r, CONST_STR_LEN("_L_EXTFORWARD_ACTUAL_PROTO")); 626 ehost = 627 http_header_env_get(r, CONST_STR_LEN("_L_EXTFORWARD_ACTUAL_HOST")); 628 } 629 630 /* note: set "Forwarded" prior to updating X-Forwarded-For (below) */ 631 632 if (flags) 633 b = http_header_request_get(r, HTTP_HEADER_FORWARDED, CONST_STR_LEN("Forwarded")); 634 635 if (flags && NULL == b) { 636 const buffer *xff = 637 http_header_request_get(r, HTTP_HEADER_X_FORWARDED_FOR, CONST_STR_LEN("X-Forwarded-For")); 638 b = http_header_request_set_ptr(r, HTTP_HEADER_FORWARDED, 639 CONST_STR_LEN("Forwarded")); 640 if (NULL != xff) { 641 /* use X-Forwarded-For contents to seed Forwarded */ 642 char *s = xff->ptr; 643 size_t used = buffer_clen(xff); 644 for (size_t i=0, j, ipv6; i < used; ++i) { 645 while (s[i] == ' ' || s[i] == '\t' || s[i] == ',') ++i; 646 if (s[i] == '\0') break; 647 j = i; 648 do { 649 ++i; 650 } while (s[i]!=' ' && s[i]!='\t' && s[i]!=',' && s[i]!='\0'); 651 /* over-simplified test expecting only IPv4 or IPv6 addresses, 652 * (not expecting :port, so treat existence of colon as IPv6, 653 * and not expecting unix paths, especially not containing ':') 654 * quote all strings, backslash-escape since IPs not validated*/ 655 ipv6 = (NULL != memchr(s+j, ':', i-j)); /*(over-simplified) */ 656 ipv6 657 ? buffer_append_string_len(b, CONST_STR_LEN("for=\"[")) 658 : buffer_append_string_len(b, CONST_STR_LEN("for=\"")); 659 buffer_append_string_backslash_escaped(b, s+j, i-j); 660 ipv6 661 ? buffer_append_string_len(b, CONST_STR_LEN("]\", ")) 662 : buffer_append_string_len(b, CONST_STR_LEN("\", ")); 663 } 664 } 665 } else if (flags) { /*(NULL != b)*/ 666 buffer_append_string_len(b, CONST_STR_LEN(", ")); 667 } 668 669 if (flags & PROXY_FORWARDED_FOR) { 670 int family = sock_addr_get_family(&con->dst_addr); 671 buffer_append_string_len(b, CONST_STR_LEN("for=")); 672 if (NULL != efor) { 673 /* over-simplified test expecting only IPv4 or IPv6 addresses, 674 * (not expecting :port, so treat existence of colon as IPv6, 675 * and not expecting unix paths, especially not containing ':') 676 * quote all strings and backslash-escape since IPs not validated 677 * (should be IP from original con->dst_addr_buf, 678 * so trustable and without :port) */ 679 int ipv6 = (NULL != strchr(efor->ptr, ':')); 680 ipv6 681 ? buffer_append_string_len(b, CONST_STR_LEN("\"[")) 682 : buffer_append_string_len(b, CONST_STR_LEN("\"")); 683 buffer_append_string_backslash_escaped(b, BUF_PTR_LEN(efor)); 684 ipv6 685 ? buffer_append_string_len(b, CONST_STR_LEN("]\"")) 686 : buffer_append_string_len(b, CONST_STR_LEN("\"")); 687 } else if (family == AF_INET) { 688 /*(Note: if :port is added, then must be quoted-string: 689 * e.g. for="...:port")*/ 690 buffer_append_string_buffer(b, &con->dst_addr_buf); 691 } else if (family == AF_INET6) { 692 buffer_append_str3(b, CONST_STR_LEN("\"["), 693 BUF_PTR_LEN(&con->dst_addr_buf), 694 CONST_STR_LEN("]\"")); 695 } else { 696 buffer_append_string_len(b, CONST_STR_LEN("\"")); 697 buffer_append_string_backslash_escaped( 698 b, BUF_PTR_LEN(&con->dst_addr_buf)); 699 buffer_append_string_len(b, CONST_STR_LEN("\"")); 700 } 701 semicolon = 1; 702 } 703 704 if (flags & PROXY_FORWARDED_BY) { 705 int family = sock_addr_get_family(&con->srv_socket->addr); 706 /* Note: getsockname() and inet_ntop() are expensive operations. 707 * (recommendation: do not to enable by=... unless required) 708 * future: might use con->srv_socket->srv_token if addr is not 709 * INADDR_ANY or in6addr_any, but must omit optional :port 710 * from con->srv_socket->srv_token for consistency */ 711 712 if (semicolon) buffer_append_string_len(b, CONST_STR_LEN(";")); 713 buffer_append_string_len(b, CONST_STR_LEN("by=\"")); 714 #ifdef HAVE_SYS_UN_H 715 /* special-case: might need to encode unix domain socket path */ 716 if (family == AF_UNIX) { 717 buffer_append_string_backslash_escaped( 718 b, BUF_PTR_LEN(con->srv_socket->srv_token)); 719 } 720 else 721 #endif 722 { 723 sock_addr addr; 724 socklen_t addrlen = sizeof(addr); 725 if (0 == getsockname(con->fd,(struct sockaddr *)&addr, &addrlen)) { 726 sock_addr_stringify_append_buffer(b, &addr); 727 } 728 } 729 buffer_append_string_len(b, CONST_STR_LEN("\"")); 730 semicolon = 1; 731 } 732 733 if (flags & PROXY_FORWARDED_PROTO) { 734 /* expecting "http" or "https" 735 * (not checking if quoted-string and encoding needed) */ 736 if (semicolon) buffer_append_string_len(b, CONST_STR_LEN(";")); 737 if (NULL != eproto) { 738 buffer_append_str2(b, CONST_STR_LEN("proto="), BUF_PTR_LEN(eproto)); 739 } else if (con->srv_socket->is_ssl) { 740 buffer_append_string_len(b, CONST_STR_LEN("proto=https")); 741 } else { 742 buffer_append_string_len(b, CONST_STR_LEN("proto=http")); 743 } 744 semicolon = 1; 745 } 746 747 if (flags & PROXY_FORWARDED_HOST) { 748 if (NULL != ehost) { 749 if (semicolon) 750 buffer_append_string_len(b, CONST_STR_LEN(";")); 751 buffer_append_string_len(b, CONST_STR_LEN("host=\"")); 752 buffer_append_string_backslash_escaped( 753 b, BUF_PTR_LEN(ehost)); 754 buffer_append_string_len(b, CONST_STR_LEN("\"")); 755 semicolon = 1; 756 } else if (r->http_host && !buffer_is_blank(r->http_host)) { 757 if (semicolon) 758 buffer_append_string_len(b, CONST_STR_LEN(";")); 759 buffer_append_string_len(b, CONST_STR_LEN("host=\"")); 760 buffer_append_string_backslash_escaped( 761 b, BUF_PTR_LEN(r->http_host)); 762 buffer_append_string_len(b, CONST_STR_LEN("\"")); 763 semicolon = 1; 764 } 765 } 766 767 if (flags & PROXY_FORWARDED_REMOTE_USER) { 768 const buffer *remote_user = 769 http_header_env_get(r, CONST_STR_LEN("REMOTE_USER")); 770 if (NULL != remote_user) { 771 if (semicolon) 772 buffer_append_string_len(b, CONST_STR_LEN(";")); 773 buffer_append_string_len(b, CONST_STR_LEN("remote_user=\"")); 774 buffer_append_string_backslash_escaped( 775 b, BUF_PTR_LEN(remote_user)); 776 buffer_append_string_len(b, CONST_STR_LEN("\"")); 777 /*semicolon = 1;*/ 778 } 779 } 780 781 /* legacy X-* headers, including X-Forwarded-For */ 782 783 b = (NULL != efor) ? efor : &con->dst_addr_buf; 784 http_header_request_set(r, HTTP_HEADER_X_FORWARDED_FOR, 785 CONST_STR_LEN("X-Forwarded-For"), 786 BUF_PTR_LEN(b)); 787 788 b = (NULL != ehost) ? ehost : r->http_host; 789 if (b && !buffer_is_blank(b)) { 790 http_header_request_set(r, HTTP_HEADER_OTHER, 791 CONST_STR_LEN("X-Host"), 792 BUF_PTR_LEN(b)); 793 http_header_request_set(r, HTTP_HEADER_OTHER, 794 CONST_STR_LEN("X-Forwarded-Host"), 795 BUF_PTR_LEN(b)); 796 } 797 798 b = (NULL != eproto) ? eproto : &r->uri.scheme; 799 http_header_request_set(r, HTTP_HEADER_X_FORWARDED_PROTO, 800 CONST_STR_LEN("X-Forwarded-Proto"), 801 BUF_PTR_LEN(b)); 802 } 803 804 805 static handler_t proxy_stdin_append(gw_handler_ctx *hctx) { 806 /*handler_ctx *hctx = (handler_ctx *)gwhctx;*/ 807 chunkqueue * const req_cq = &hctx->r->reqbody_queue; 808 const off_t req_cqlen = chunkqueue_length(req_cq); 809 if (req_cqlen) { 810 /* XXX: future: use http_chunk_len_append() */ 811 buffer * const tb = hctx->r->tmp_buf; 812 buffer_clear(tb); 813 buffer_append_uint_hex_lc(tb, (uintmax_t)req_cqlen); 814 buffer_append_string_len(tb, CONST_STR_LEN("\r\n")); 815 816 const off_t len = (off_t)buffer_clen(tb) 817 + 2 /*(+2 end chunk "\r\n")*/ 818 + req_cqlen; 819 if (-1 != hctx->wb_reqlen) 820 hctx->wb_reqlen += (hctx->wb_reqlen >= 0) ? len : -len; 821 822 (chunkqueue_is_empty(&hctx->wb) || hctx->wb.first->type == MEM_CHUNK) 823 /* else FILE_CHUNK for temp file */ 824 ? chunkqueue_append_mem(&hctx->wb, BUF_PTR_LEN(tb)) 825 : chunkqueue_append_mem_min(&hctx->wb, BUF_PTR_LEN(tb)); 826 chunkqueue_steal(&hctx->wb, req_cq, req_cqlen); 827 828 chunkqueue_append_mem_min(&hctx->wb, CONST_STR_LEN("\r\n")); 829 } 830 831 if (hctx->wb.bytes_in == hctx->wb_reqlen) {/*hctx->r->reqbody_length >= 0*/ 832 /* terminate STDIN */ 833 chunkqueue_append_mem(&hctx->wb, CONST_STR_LEN("0\r\n\r\n")); 834 hctx->wb_reqlen += (int)sizeof("0\r\n\r\n"); 835 } 836 837 return HANDLER_GO_ON; 838 } 839 840 841 static handler_t proxy_create_env(gw_handler_ctx *gwhctx) { 842 handler_ctx *hctx = (handler_ctx *)gwhctx; 843 request_st * const r = hctx->gw.r; 844 const int remap_headers = (NULL != hctx->conf.header.urlpaths 845 || NULL != hctx->conf.header.hosts_request); 846 size_t rsz = (size_t)(r->read_queue.bytes_out - hctx->gw.wb.bytes_in); 847 if (rsz >= 65536) rsz = r->rqst_header_len; 848 buffer * const b = chunkqueue_prepend_buffer_open_sz(&hctx->gw.wb, rsz); 849 850 /* build header */ 851 852 /* request line */ 853 http_method_append(b, r->http_method); 854 buffer_append_str2(b, CONST_STR_LEN(" "), BUF_PTR_LEN(&r->target)); 855 if (remap_headers) 856 http_header_remap_uri(b, buffer_clen(b) - buffer_clen(&r->target), 857 &hctx->conf.header, 1); 858 859 buffer_append_string_len(b, !hctx->conf.header.force_http10 860 ? " HTTP/1.1" : " HTTP/1.0", 861 sizeof(" HTTP/1.1")-1); 862 863 if (hctx->conf.replace_http_host && !buffer_is_blank(hctx->gw.host->id)) { 864 if (hctx->gw.conf.debug > 1) { 865 log_error(r->conf.errh, __FILE__, __LINE__, 866 "proxy - using \"%s\" as HTTP Host", hctx->gw.host->id->ptr); 867 } 868 buffer_append_str2(b, CONST_STR_LEN("\r\nHost: "), 869 BUF_PTR_LEN(hctx->gw.host->id)); 870 } else if (r->http_host && !buffer_is_unset(r->http_host)) { 871 buffer_append_str2(b, CONST_STR_LEN("\r\nHost: "), 872 BUF_PTR_LEN(r->http_host)); 873 if (remap_headers) { 874 size_t alen = buffer_clen(r->http_host); 875 http_header_remap_host(b, buffer_clen(b) - alen, &hctx->conf.header, 1, alen); 876 } 877 } else { 878 /* no Host header available; must send HTTP/1.0 request */ 879 b->ptr[b->used-2] = '0'; /*(overwrite end of request line)*/ 880 } 881 882 /* "Forwarded" and legacy X- headers */ 883 proxy_set_Forwarded(r->con, r, hctx->conf.forwarded); 884 885 if (r->reqbody_length > 0 886 || (0 == r->reqbody_length 887 && !http_method_get_or_head(r->http_method))) { 888 /* set Content-Length if client sent Transfer-Encoding: chunked 889 * and not streaming to backend (request body has been fully received) */ 890 const buffer *vb = http_header_request_get(r, HTTP_HEADER_CONTENT_LENGTH, CONST_STR_LEN("Content-Length")); 891 if (NULL == vb) { 892 buffer_append_int( 893 http_header_request_set_ptr(r, HTTP_HEADER_CONTENT_LENGTH, 894 CONST_STR_LEN("Content-Length")), 895 r->reqbody_length); 896 } 897 } 898 else if (!hctx->conf.header.force_http10 899 && -1 == r->reqbody_length 900 && (r->conf.stream_request_body 901 & (FDEVENT_STREAM_REQUEST | FDEVENT_STREAM_REQUEST_BUFMIN))) { 902 hctx->gw.stdin_append = proxy_stdin_append; /* stream chunked body */ 903 buffer_append_string_len(b, CONST_STR_LEN("\r\nTransfer-Encoding: chunked")); 904 } 905 906 /* request header */ 907 const buffer *connhdr = NULL; 908 const buffer *te = NULL; 909 const buffer *upgrade = NULL; 910 for (size_t i = 0, used = r->rqst_headers.used; i < used; ++i) { 911 const data_string * const ds = (data_string *)r->rqst_headers.data[i]; 912 switch (ds->ext) { 913 default: 914 break; 915 case HTTP_HEADER_TE: 916 if (hctx->conf.header.force_http10 || r->http_version == HTTP_VERSION_1_0) continue; 917 /* ignore if not exactly "trailers" */ 918 if (!buffer_eq_icase_slen(&ds->value, CONST_STR_LEN("trailers"))) continue; 919 /*if (!buffer_is_blank(&ds->value)) te = &ds->value;*/ 920 te = &ds->value; /*("trailers")*/ 921 break; 922 case HTTP_HEADER_HOST: 923 continue; /*(handled further above)*/ 924 case HTTP_HEADER_UPGRADE: 925 if (hctx->conf.header.force_http10 || r->http_version == HTTP_VERSION_1_0) continue; 926 if (!hctx->conf.header.upgrade) continue; 927 if (!buffer_is_blank(&ds->value)) upgrade = &ds->value; 928 break; 929 case HTTP_HEADER_CONNECTION: 930 connhdr = &ds->value; 931 continue; 932 case HTTP_HEADER_SET_COOKIE: 933 continue; /*(response header only; avoid accidental reflection)*/ 934 case HTTP_HEADER_OTHER: 935 if (buffer_eq_icase_slen(&ds->key, CONST_STR_LEN("Proxy-Connection"))) continue; 936 /* Do not emit HTTP_PROXY in environment. 937 * Some executables use HTTP_PROXY to configure 938 * outgoing proxy. See also https://httpoxy.org/ */ 939 if (buffer_eq_icase_slen(&ds->key, CONST_STR_LEN("Proxy"))) continue; 940 break; 941 case HTTP_HEADER_EXPECT: 942 /* Do not forward Expect: 100-continue 943 * since we do not handle "HTTP/1.1 100 Continue" response */ 944 continue; 945 } 946 947 const uint32_t klen = buffer_clen(&ds->key); 948 const uint32_t vlen = buffer_clen(&ds->value); 949 if (0 == klen || 0 == vlen) continue; 950 char * restrict s = buffer_extend(b, klen+vlen+4); 951 s[0] = '\r'; 952 s[1] = '\n'; 953 memcpy(s+2, ds->key.ptr, klen); 954 s += 2+klen; 955 s[0] = ':'; 956 s[1] = ' '; 957 memcpy(s+2, ds->value.ptr, vlen); 958 959 if (!remap_headers) continue; 960 961 /* check for hdrs for which to remap URIs in-place after append to b */ 962 963 switch (klen) { 964 default: 965 continue; 966 #if 0 /* "URI" is HTTP response header (non-standard; historical in Apache) */ 967 case 3: 968 if (ds->ext == HTTP_HEADER_OTHER && buffer_eq_icase_slen(&ds->key, CONST_STR_LEN("URI"))) break; 969 continue; 970 #endif 971 #if 0 /* "Location" is HTTP response header */ 972 case 8: 973 if (ds->ext == HTTP_HEADER_LOCATION) break; 974 continue; 975 #endif 976 case 11: /* "Destination" is WebDAV request header */ 977 if (ds->ext == HTTP_HEADER_OTHER && buffer_eq_icase_slen(&ds->key, CONST_STR_LEN("Destination"))) break; 978 continue; 979 case 16: /* "Content-Location" may be HTTP request or response header */ 980 if (ds->ext == HTTP_HEADER_CONTENT_LOCATION) break; 981 continue; 982 } 983 984 http_header_remap_uri(b, buffer_clen(b) - vlen, &hctx->conf.header, 1); 985 } 986 987 if (connhdr && !hctx->conf.header.force_http10 && r->http_version >= HTTP_VERSION_1_1 988 && !buffer_eq_icase_slen(connhdr, CONST_STR_LEN("close"))) { 989 /* mod_proxy always sends Connection: close to backend */ 990 buffer_append_string_len(b, CONST_STR_LEN("\r\nConnection: close")); 991 /* (future: might be pedantic and also check Connection header for each 992 * token using http_header_str_contains_token() */ 993 if (te) 994 buffer_append_string_len(b, CONST_STR_LEN(", te")); 995 if (upgrade) 996 buffer_append_string_len(b, CONST_STR_LEN(", upgrade")); 997 buffer_append_string_len(b, CONST_STR_LEN("\r\n\r\n")); 998 } 999 else /* mod_proxy always sends Connection: close to backend */ 1000 buffer_append_string_len(b, CONST_STR_LEN("\r\nConnection: close\r\n\r\n")); 1001 1002 hctx->gw.wb_reqlen = buffer_clen(b); 1003 chunkqueue_prepend_buffer_commit(&hctx->gw.wb); 1004 1005 if (r->reqbody_length) { 1006 if (r->reqbody_length > 0) 1007 hctx->gw.wb_reqlen += r->reqbody_length; /* total req size */ 1008 else /* as-yet-unknown total request size (Transfer-Encoding: chunked)*/ 1009 hctx->gw.wb_reqlen = -hctx->gw.wb_reqlen; 1010 if (hctx->gw.stdin_append == proxy_stdin_append) 1011 proxy_stdin_append(&hctx->gw); 1012 else 1013 chunkqueue_append_chunkqueue(&hctx->gw.wb, &r->reqbody_queue); 1014 } 1015 1016 status_counter_inc(CONST_STR_LEN("proxy.requests")); 1017 return HANDLER_GO_ON; 1018 } 1019 1020 1021 static handler_t proxy_create_env_connect(gw_handler_ctx *gwhctx) { 1022 handler_ctx *hctx = (handler_ctx *)gwhctx; 1023 request_st * const r = hctx->gw.r; 1024 r->http_status = 200; /* OK */ 1025 r->resp_body_started = 1; 1026 gw_set_transparent(&hctx->gw); 1027 http_response_upgrade_read_body_unknown(r); 1028 1029 status_counter_inc(CONST_STR_LEN("proxy.requests")); 1030 return HANDLER_GO_ON; 1031 } 1032 1033 1034 static handler_t proxy_response_headers(request_st * const r, struct http_response_opts_t *opts) { 1035 /* response headers just completed */ 1036 handler_ctx *hctx = (handler_ctx *)opts->pdata; 1037 1038 if (light_btst(r->resp_htags, HTTP_HEADER_UPGRADE)) { 1039 if (hctx->conf.header.upgrade && r->http_status == 101) { 1040 /* 101 Switching Protocols; transition to transparent proxy */ 1041 gw_set_transparent(&hctx->gw); 1042 http_response_upgrade_read_body_unknown(r); 1043 } 1044 else { 1045 light_bclr(r->resp_htags, HTTP_HEADER_UPGRADE); 1046 #if 0 1047 /* preserve prior questionable behavior; likely broken behavior 1048 * anyway if backend thinks connection is being upgraded but client 1049 * does not receive Connection: upgrade */ 1050 http_header_response_unset(r, HTTP_HEADER_UPGRADE, 1051 CONST_STR_LEN("Upgrade")) 1052 #endif 1053 } 1054 } 1055 1056 /* rewrite paths, if needed */ 1057 1058 if (NULL == hctx->conf.header.urlpaths 1059 && NULL == hctx->conf.header.hosts_response) 1060 return HANDLER_GO_ON; 1061 1062 if (light_btst(r->resp_htags, HTTP_HEADER_LOCATION)) { 1063 buffer *vb = http_header_response_get(r, HTTP_HEADER_LOCATION, CONST_STR_LEN("Location")); 1064 if (vb) http_header_remap_uri(vb, 0, &hctx->conf.header, 0); 1065 } 1066 if (light_btst(r->resp_htags, HTTP_HEADER_CONTENT_LOCATION)) { 1067 buffer *vb = http_header_response_get(r, HTTP_HEADER_CONTENT_LOCATION, CONST_STR_LEN("Content-Location")); 1068 if (vb) http_header_remap_uri(vb, 0, &hctx->conf.header, 0); 1069 } 1070 if (light_btst(r->resp_htags, HTTP_HEADER_SET_COOKIE)) { 1071 buffer *vb = http_header_response_get(r, HTTP_HEADER_SET_COOKIE, CONST_STR_LEN("Set-Cookie")); 1072 if (vb) http_header_remap_setcookie(vb, 0, &hctx->conf.header); 1073 } 1074 1075 return HANDLER_GO_ON; 1076 } 1077 1078 static handler_t mod_proxy_check_extension(request_st * const r, void *p_d) { 1079 plugin_data *p = p_d; 1080 handler_t rc; 1081 1082 if (NULL != r->handler_module) return HANDLER_GO_ON; 1083 1084 mod_proxy_patch_config(r, p); 1085 if (NULL == p->conf.gw.exts) return HANDLER_GO_ON; 1086 1087 rc = gw_check_extension(r, (gw_plugin_data *)p, 1, sizeof(handler_ctx)); 1088 if (HANDLER_GO_ON != rc) return rc; 1089 1090 if (r->handler_module == p->self) { 1091 handler_ctx *hctx = r->plugin_ctx[p->id]; 1092 hctx->gw.create_env = proxy_create_env; 1093 hctx->gw.response = chunk_buffer_acquire(); 1094 hctx->gw.opts.backend = BACKEND_PROXY; 1095 hctx->gw.opts.pdata = hctx; 1096 hctx->gw.opts.headers = proxy_response_headers; 1097 1098 hctx->conf = p->conf; /*(copies struct)*/ 1099 hctx->conf.header.http_host = r->http_host; 1100 hctx->conf.header.upgrade &= (r->http_version == HTTP_VERSION_1_1); 1101 /* mod_proxy currently sends all backend requests as http. 1102 * https-remap is a flag since it might not be needed if backend 1103 * honors Forwarded or X-Forwarded-Proto headers, e.g. by using 1104 * lighttpd mod_extforward or similar functionality in backend*/ 1105 if (hctx->conf.header.https_remap) { 1106 hctx->conf.header.https_remap = 1107 buffer_is_equal_string(&r->uri.scheme, CONST_STR_LEN("https")); 1108 } 1109 1110 if (r->http_method == HTTP_METHOD_CONNECT) { 1111 /*(note: not requiring HTTP/1.1 due to too many non-compliant 1112 * clients such as 'openssl s_client')*/ 1113 if (hctx->conf.header.connect_method) { 1114 hctx->gw.create_env = proxy_create_env_connect; 1115 } 1116 else { 1117 r->http_status = 405; /* Method Not Allowed */ 1118 r->handler_module = NULL; 1119 return HANDLER_FINISHED; 1120 } 1121 } 1122 } 1123 1124 return HANDLER_GO_ON; 1125 } 1126 1127 1128 int mod_proxy_plugin_init(plugin *p); 1129 int mod_proxy_plugin_init(plugin *p) { 1130 p->version = LIGHTTPD_VERSION_ID; 1131 p->name = "proxy"; 1132 1133 p->init = mod_proxy_init; 1134 p->cleanup = mod_proxy_free; 1135 p->set_defaults = mod_proxy_set_defaults; 1136 p->handle_request_reset = gw_handle_request_reset; 1137 p->handle_uri_clean = mod_proxy_check_extension; 1138 p->handle_subrequest = gw_handle_subrequest; 1139 p->handle_trigger = gw_handle_trigger; 1140 p->handle_waitpid = gw_handle_waitpid_cb; 1141 1142 return 0; 1143 } 1144