server_fcgi.c revision 1.43
1/* $OpenBSD: server_fcgi.c,v 1.43 2014/12/21 00:54:49 guenther Exp $ */ 2 3/* 4 * Copyright (c) 2014 Florian Obser <florian@openbsd.org> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19#include <sys/types.h> 20#include <sys/queue.h> 21#include <sys/time.h> 22#include <sys/stat.h> 23#include <sys/socket.h> 24#include <sys/un.h> 25#include <sys/tree.h> 26 27#include <net/if.h> 28#include <netinet/in.h> 29#include <netinet/ip.h> 30#include <netinet/tcp.h> 31 32#include <errno.h> 33#include <fcntl.h> 34#include <stdlib.h> 35#include <string.h> 36#include <unistd.h> 37#include <stdio.h> 38#include <ctype.h> 39#include <err.h> 40#include <event.h> 41 42#include "httpd.h" 43#include "http.h" 44 45#define FCGI_PADDING_SIZE 255 46#define FCGI_RECORD_SIZE \ 47 (sizeof(struct fcgi_record_header) + FCGI_CONTENT_SIZE + FCGI_PADDING_SIZE) 48 49#define FCGI_BEGIN_REQUEST 1 50#define FCGI_ABORT_REQUEST 2 51#define FCGI_END_REQUEST 3 52#define FCGI_PARAMS 4 53#define FCGI_STDIN 5 54#define FCGI_STDOUT 6 55#define FCGI_STDERR 7 56#define FCGI_DATA 8 57#define FCGI_GET_VALUES 9 58#define FCGI_GET_VALUES_RESULT 10 59#define FCGI_UNKNOWN_TYPE 11 60#define FCGI_MAXTYPE (FCGI_UNKNOWN_TYPE) 61 62#define FCGI_RESPONDER 1 63 64struct fcgi_record_header { 65 uint8_t version; 66 uint8_t type; 67 uint16_t id; 68 uint16_t content_len; 69 uint8_t padding_len; 70 uint8_t reserved; 71} __packed; 72 73struct fcgi_begin_request_body { 74 uint16_t role; 75 uint8_t flags; 76 uint8_t reserved[5]; 77} __packed; 78 79struct server_fcgi_param { 80 int total_len; 81 uint8_t buf[FCGI_RECORD_SIZE]; 82}; 83 84int server_fcgi_header(struct client *, u_int); 85void server_fcgi_read(struct bufferevent *, void *); 86int server_fcgi_writeheader(struct client *, struct kv *, void *); 87int server_fcgi_writechunk(struct client *); 88int server_fcgi_getheaders(struct client *); 89int fcgi_add_param(struct server_fcgi_param *, const char *, const char *, 90 struct client *); 91 92int 93server_fcgi(struct httpd *env, struct client *clt) 94{ 95 struct server_fcgi_param param; 96 struct server_config *srv_conf = clt->clt_srv_conf; 97 struct http_descriptor *desc = clt->clt_descreq; 98 struct fcgi_record_header *h; 99 struct fcgi_begin_request_body *begin; 100 char hbuf[MAXHOSTNAMELEN]; 101 size_t scriptlen; 102 int pathlen; 103 int fd = -1, ret; 104 const char *errstr = NULL; 105 char *str, *p, *script = NULL; 106 107 if (srv_conf->socket[0] == ':') { 108 struct sockaddr_storage ss; 109 in_port_t port; 110 111 p = srv_conf->socket + 1; 112 113 port = strtonum(p, 0, 0xffff, &errstr); 114 if (errstr != NULL) { 115 log_warn("%s: strtonum %s, %s", __func__, p, errstr); 116 goto fail; 117 } 118 memset(&ss, 0, sizeof(ss)); 119 ss.ss_family = AF_INET; 120 ((struct sockaddr_in *) 121 &ss)->sin_addr.s_addr = htonl(INADDR_LOOPBACK); 122 port = htons(port); 123 124 if ((fd = server_socket_connect(&ss, port, srv_conf)) == -1) 125 goto fail; 126 } else { 127 struct sockaddr_un sun; 128 size_t len; 129 130 if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) 131 goto fail; 132 133 memset(&sun, 0, sizeof(sun)); 134 sun.sun_family = AF_UNIX; 135 len = strlcpy(sun.sun_path, 136 srv_conf->socket, sizeof(sun.sun_path)); 137 if (len >= sizeof(sun.sun_path)) { 138 errstr = "socket path to long"; 139 goto fail; 140 } 141 sun.sun_len = len; 142 143 if (connect(fd, (struct sockaddr *)&sun, sizeof(sun)) == -1) 144 goto fail; 145 } 146 147 socket_set_blockmode(fd, BM_NONBLOCK); 148 149 memset(hbuf, 0, sizeof(hbuf)); 150 clt->clt_fcgi_state = FCGI_READ_HEADER; 151 clt->clt_fcgi_toread = sizeof(struct fcgi_record_header); 152 153 if (clt->clt_srvevb != NULL) 154 evbuffer_free(clt->clt_srvevb); 155 156 clt->clt_srvevb = evbuffer_new(); 157 if (clt->clt_srvevb == NULL) { 158 errstr = "failed to allocate evbuffer"; 159 goto fail; 160 } 161 162 clt->clt_fd = fd; 163 if (clt->clt_srvbev != NULL) 164 bufferevent_free(clt->clt_srvbev); 165 166 clt->clt_srvbev = bufferevent_new(fd, server_fcgi_read, 167 NULL, server_file_error, clt); 168 if (clt->clt_srvbev == NULL) { 169 errstr = "failed to allocate fcgi buffer event"; 170 goto fail; 171 } 172 173 memset(¶m, 0, sizeof(param)); 174 175 h = (struct fcgi_record_header *)¶m.buf; 176 h->version = 1; 177 h->type = FCGI_BEGIN_REQUEST; 178 h->id = htons(1); 179 h->content_len = htons(sizeof(struct fcgi_begin_request_body)); 180 h->padding_len = 0; 181 182 begin = (struct fcgi_begin_request_body *)¶m.buf[sizeof(struct 183 fcgi_record_header)]; 184 begin->role = htons(FCGI_RESPONDER); 185 186 bufferevent_write(clt->clt_srvbev, ¶m.buf, 187 sizeof(struct fcgi_record_header) + 188 sizeof(struct fcgi_begin_request_body)); 189 190 h->type = FCGI_PARAMS; 191 h->content_len = param.total_len = 0; 192 193 if ((pathlen = asprintf(&script, "%s%s", srv_conf->root, 194 desc->http_path_alias != NULL ? 195 desc->http_path_alias : desc->http_path)) == -1) { 196 errstr = "failed to get script name"; 197 goto fail; 198 } 199 200 scriptlen = path_info(script); 201 /* 202 * no part of root should show up in PATH_INFO. 203 * therefore scriptlen should be >= strlen(root) 204 */ 205 if (scriptlen < strlen(srv_conf->root)) 206 scriptlen = strlen(srv_conf->root); 207 if ((int)scriptlen < pathlen) { 208 if (fcgi_add_param(¶m, "PATH_INFO", 209 script + scriptlen, clt) == -1) { 210 errstr = "failed to encode param"; 211 goto fail; 212 } 213 script[scriptlen] = '\0'; 214 } 215 216 if (fcgi_add_param(¶m, "SCRIPT_NAME", 217 script + strlen(srv_conf->root), clt) == -1) { 218 errstr = "failed to encode param"; 219 goto fail; 220 } 221 if (fcgi_add_param(¶m, "SCRIPT_FILENAME", script, clt) == -1) { 222 errstr = "failed to encode param"; 223 goto fail; 224 } 225 226 if (desc->http_query) 227 if (fcgi_add_param(¶m, "QUERY_STRING", desc->http_query, 228 clt) == -1) { 229 errstr = "failed to encode param"; 230 goto fail; 231 } 232 233 if (fcgi_add_param(¶m, "DOCUMENT_ROOT", srv_conf->root, 234 clt) == -1) { 235 errstr = "failed to encode param"; 236 goto fail; 237 } 238 if (fcgi_add_param(¶m, "DOCUMENT_URI", desc->http_path, 239 clt) == -1) { 240 errstr = "failed to encode param"; 241 goto fail; 242 } 243 if (fcgi_add_param(¶m, "GATEWAY_INTERFACE", "CGI/1.1", 244 clt) == -1) { 245 errstr = "failed to encode param"; 246 goto fail; 247 } 248 249 /* Add HTTP_* headers */ 250 if (server_headers(clt, desc, server_fcgi_writeheader, ¶m) == -1) { 251 errstr = "failed to encode param"; 252 goto fail; 253 } 254 255 if (srv_conf->flags & SRVFLAG_TLS) 256 if (fcgi_add_param(¶m, "HTTPS", "on", clt) == -1) { 257 errstr = "failed to encode param"; 258 goto fail; 259 } 260 261 (void)print_host(&clt->clt_ss, hbuf, sizeof(hbuf)); 262 if (fcgi_add_param(¶m, "REMOTE_ADDR", hbuf, clt) == -1) { 263 errstr = "failed to encode param"; 264 goto fail; 265 } 266 267 (void)snprintf(hbuf, sizeof(hbuf), "%d", ntohs(clt->clt_port)); 268 if (fcgi_add_param(¶m, "REMOTE_PORT", hbuf, clt) == -1) { 269 errstr = "failed to encode param"; 270 goto fail; 271 } 272 273 if (fcgi_add_param(¶m, "REQUEST_METHOD", 274 server_httpmethod_byid(desc->http_method), clt) == -1) { 275 errstr = "failed to encode param"; 276 goto fail; 277 } 278 279 if (!desc->http_query) { 280 if (fcgi_add_param(¶m, "REQUEST_URI", desc->http_path, 281 clt) == -1) { 282 errstr = "failed to encode param"; 283 goto fail; 284 } 285 } else if (asprintf(&str, "%s?%s", desc->http_path, 286 desc->http_query) != -1) { 287 ret = fcgi_add_param(¶m, "REQUEST_URI", str, clt); 288 free(str); 289 if (ret == -1) { 290 errstr = "failed to encode param"; 291 goto fail; 292 } 293 } 294 295 (void)print_host(&clt->clt_srv_ss, hbuf, sizeof(hbuf)); 296 if (fcgi_add_param(¶m, "SERVER_ADDR", hbuf, clt) == -1) { 297 errstr = "failed to encode param"; 298 goto fail; 299 } 300 301 (void)snprintf(hbuf, sizeof(hbuf), "%d", 302 ntohs(server_socket_getport(&clt->clt_srv_ss))); 303 if (fcgi_add_param(¶m, "SERVER_PORT", hbuf, clt) == -1) { 304 errstr = "failed to encode param"; 305 goto fail; 306 } 307 308 if (fcgi_add_param(¶m, "SERVER_NAME", srv_conf->name, 309 clt) == -1) { 310 errstr = "failed to encode param"; 311 goto fail; 312 } 313 314 if (fcgi_add_param(¶m, "SERVER_PROTOCOL", desc->http_version, 315 clt) == -1) { 316 errstr = "failed to encode param"; 317 goto fail; 318 } 319 320 if (fcgi_add_param(¶m, "SERVER_SOFTWARE", HTTPD_SERVERNAME, 321 clt) == -1) { 322 errstr = "failed to encode param"; 323 goto fail; 324 } 325 326 if (param.total_len != 0) { /* send last params record */ 327 bufferevent_write(clt->clt_srvbev, ¶m.buf, 328 sizeof(struct fcgi_record_header) + 329 ntohs(h->content_len)); 330 } 331 332 /* send "no more params" message */ 333 h->content_len = 0; 334 bufferevent_write(clt->clt_srvbev, ¶m.buf, 335 sizeof(struct fcgi_record_header)); 336 337 bufferevent_settimeout(clt->clt_srvbev, 338 srv_conf->timeout.tv_sec, srv_conf->timeout.tv_sec); 339 bufferevent_enable(clt->clt_srvbev, EV_READ|EV_WRITE); 340 if (clt->clt_toread != 0) { 341 server_read_httpcontent(clt->clt_bev, clt); 342 bufferevent_enable(clt->clt_bev, EV_READ); 343 } else { 344 bufferevent_disable(clt->clt_bev, EV_READ); 345 fcgi_add_stdin(clt, NULL); 346 } 347 348 if (strcmp(desc->http_version, "HTTP/1.1") == 0) { 349 clt->clt_fcgi_chunked = 1; 350 } else { 351 /* HTTP/1.0 does not support chunked encoding */ 352 clt->clt_fcgi_chunked = 0; 353 clt->clt_persist = 0; 354 } 355 clt->clt_fcgi_end = 0; 356 clt->clt_done = 0; 357 358 free(script); 359 return (0); 360 fail: 361 free(script); 362 if (errstr == NULL) 363 errstr = strerror(errno); 364 server_abort_http(clt, 500, errstr); 365 return (-1); 366} 367 368int 369fcgi_add_stdin(struct client *clt, struct evbuffer *evbuf) 370{ 371 struct fcgi_record_header h; 372 373 memset(&h, 0, sizeof(h)); 374 h.version = 1; 375 h.type = FCGI_STDIN; 376 h.id = htons(1); 377 h.padding_len = 0; 378 379 if (evbuf == NULL) { 380 h.content_len = 0; 381 return bufferevent_write(clt->clt_srvbev, &h, 382 sizeof(struct fcgi_record_header)); 383 } else { 384 h.content_len = htons(EVBUFFER_LENGTH(evbuf)); 385 if (bufferevent_write(clt->clt_srvbev, &h, 386 sizeof(struct fcgi_record_header)) == -1) 387 return -1; 388 return bufferevent_write_buffer(clt->clt_srvbev, evbuf); 389 } 390 return (0); 391} 392 393int 394fcgi_add_param(struct server_fcgi_param *p, const char *key, 395 const char *val, struct client *clt) 396{ 397 struct fcgi_record_header *h; 398 int len = 0; 399 int key_len = strlen(key); 400 int val_len = strlen(val); 401 uint8_t *param; 402 403 len += key_len + val_len; 404 len += key_len > 127 ? 4 : 1; 405 len += val_len > 127 ? 4 : 1; 406 407 DPRINTF("%s: %s[%d] => %s[%d], total_len: %d", __func__, key, key_len, 408 val, val_len, p->total_len); 409 410 if (len > FCGI_CONTENT_SIZE) 411 return (-1); 412 413 if (p->total_len + len > FCGI_CONTENT_SIZE) { 414 bufferevent_write(clt->clt_srvbev, p->buf, 415 sizeof(struct fcgi_record_header) + p->total_len); 416 p->total_len = 0; 417 } 418 419 h = (struct fcgi_record_header *)p->buf; 420 param = p->buf + sizeof(*h) + p->total_len; 421 422 if (key_len > 127) { 423 *param++ = ((key_len >> 24) & 0xff) | 0x80; 424 *param++ = ((key_len >> 16) & 0xff); 425 *param++ = ((key_len >> 8) & 0xff); 426 *param++ = (key_len & 0xff); 427 } else 428 *param++ = key_len; 429 430 if (val_len > 127) { 431 *param++ = ((val_len >> 24) & 0xff) | 0x80; 432 *param++ = ((val_len >> 16) & 0xff); 433 *param++ = ((val_len >> 8) & 0xff); 434 *param++ = (val_len & 0xff); 435 } else 436 *param++ = val_len; 437 438 memcpy(param, key, key_len); 439 param += key_len; 440 memcpy(param, val, val_len); 441 442 p->total_len += len; 443 444 h->content_len = htons(p->total_len); 445 return (0); 446} 447 448void 449server_fcgi_read(struct bufferevent *bev, void *arg) 450{ 451 uint8_t buf[FCGI_RECORD_SIZE]; 452 struct client *clt = (struct client *) arg; 453 struct fcgi_record_header *h; 454 size_t len; 455 char *ptr; 456 457 do { 458 len = bufferevent_read(bev, buf, clt->clt_fcgi_toread); 459 /* XXX error handling */ 460 evbuffer_add(clt->clt_srvevb, buf, len); 461 clt->clt_fcgi_toread -= len; 462 DPRINTF("%s: len: %lu toread: %d state: %d type: %d", 463 __func__, len, clt->clt_fcgi_toread, 464 clt->clt_fcgi_state, clt->clt_fcgi_type); 465 466 if (clt->clt_fcgi_toread != 0) 467 return; 468 469 switch (clt->clt_fcgi_state) { 470 case FCGI_READ_HEADER: 471 clt->clt_fcgi_state = FCGI_READ_CONTENT; 472 h = (struct fcgi_record_header *) 473 EVBUFFER_DATA(clt->clt_srvevb); 474 DPRINTF("%s: record header: version %d type %d id %d " 475 "content len %d padding %d", __func__, 476 h->version, h->type, ntohs(h->id), 477 ntohs(h->content_len), h->padding_len); 478 clt->clt_fcgi_type = h->type; 479 clt->clt_fcgi_toread = ntohs(h->content_len); 480 clt->clt_fcgi_padding_len = h->padding_len; 481 evbuffer_drain(clt->clt_srvevb, 482 EVBUFFER_LENGTH(clt->clt_srvevb)); 483 if (clt->clt_fcgi_toread != 0) 484 break; 485 else if (clt->clt_fcgi_type == FCGI_STDOUT && 486 !clt->clt_chunk) { 487 server_abort_http(clt, 500, "empty stdout"); 488 return; 489 } 490 491 /* fallthrough if content_len == 0 */ 492 case FCGI_READ_CONTENT: 493 switch (clt->clt_fcgi_type) { 494 case FCGI_STDERR: 495 if (EVBUFFER_LENGTH(clt->clt_srvevb) > 0 && 496 (ptr = get_string( 497 EVBUFFER_DATA(clt->clt_srvevb), 498 EVBUFFER_LENGTH(clt->clt_srvevb))) 499 != NULL) { 500 server_sendlog(clt->clt_srv_conf, 501 IMSG_LOG_ERROR, "%s", ptr); 502 free(ptr); 503 } 504 break; 505 case FCGI_STDOUT: 506 if (++clt->clt_chunk == 1) { 507 if (server_fcgi_header(clt, 508 server_fcgi_getheaders(clt)) 509 == -1) { 510 server_abort_http(clt, 500, 511 "malformed fcgi headers"); 512 return; 513 } 514 if (!EVBUFFER_LENGTH(clt->clt_srvevb)) 515 break; 516 } 517 /* FALLTHROUGH */ 518 case FCGI_END_REQUEST: 519 if (server_fcgi_writechunk(clt) == -1) { 520 server_abort_http(clt, 500, 521 "encoding error"); 522 return; 523 } 524 break; 525 } 526 evbuffer_drain(clt->clt_srvevb, 527 EVBUFFER_LENGTH(clt->clt_srvevb)); 528 if (!clt->clt_fcgi_padding_len) { 529 clt->clt_fcgi_state = FCGI_READ_HEADER; 530 clt->clt_fcgi_toread = 531 sizeof(struct fcgi_record_header); 532 } else { 533 clt->clt_fcgi_state = FCGI_READ_PADDING; 534 clt->clt_fcgi_toread = 535 clt->clt_fcgi_padding_len; 536 } 537 break; 538 case FCGI_READ_PADDING: 539 evbuffer_drain(clt->clt_srvevb, 540 EVBUFFER_LENGTH(clt->clt_srvevb)); 541 clt->clt_fcgi_state = FCGI_READ_HEADER; 542 clt->clt_fcgi_toread = 543 sizeof(struct fcgi_record_header); 544 break; 545 } 546 } while (len > 0); 547} 548 549int 550server_fcgi_header(struct client *clt, u_int code) 551{ 552 struct http_descriptor *desc = clt->clt_descreq; 553 struct http_descriptor *resp = clt->clt_descresp; 554 const char *error; 555 char tmbuf[32]; 556 struct kv *kv, key; 557 558 if (desc == NULL || (error = server_httperror_byid(code)) == NULL) 559 return (-1); 560 561 if (server_log_http(clt, code, 0) == -1) 562 return (-1); 563 564 /* Add error codes */ 565 if (kv_setkey(&resp->http_pathquery, "%lu", code) == -1 || 566 kv_set(&resp->http_pathquery, "%s", error) == -1) 567 return (-1); 568 569 /* Add headers */ 570 if (kv_add(&resp->http_headers, "Server", HTTPD_SERVERNAME) == NULL) 571 return (-1); 572 573 /* Set chunked encoding */ 574 if (clt->clt_fcgi_chunked) { 575 /* XXX Should we keep and handle Content-Length instead? */ 576 key.kv_key = "Content-Length"; 577 if ((kv = kv_find(&resp->http_headers, &key)) != NULL) 578 kv_delete(&resp->http_headers, kv); 579 580 /* 581 * XXX What if the FastCGI added some kind of Transfer-Encoding? 582 * XXX like gzip, deflate or even "chunked"? 583 */ 584 if (kv_add(&resp->http_headers, 585 "Transfer-Encoding", "chunked") == NULL) 586 return (-1); 587 } 588 589 /* Is it a persistent connection? */ 590 if (clt->clt_persist) { 591 if (kv_add(&resp->http_headers, 592 "Connection", "keep-alive") == NULL) 593 return (-1); 594 } else if (kv_add(&resp->http_headers, "Connection", "close") == NULL) 595 return (-1); 596 597 /* Date header is mandatory and should be added as late as possible */ 598 if (server_http_time(time(NULL), tmbuf, sizeof(tmbuf)) <= 0 || 599 kv_add(&resp->http_headers, "Date", tmbuf) == NULL) 600 return (-1); 601 602 /* Write initial header (fcgi might append more) */ 603 if (server_writeresponse_http(clt) == -1 || 604 server_bufferevent_print(clt, "\r\n") == -1 || 605 server_headers(clt, resp, server_writeheader_http, NULL) == -1 || 606 server_bufferevent_print(clt, "\r\n") == -1) 607 return (-1); 608 609 return (0); 610} 611 612int 613server_fcgi_writeheader(struct client *clt, struct kv *hdr, void *arg) 614{ 615 struct server_fcgi_param *param = arg; 616 char *val, *name, *p; 617 const char *key; 618 int ret; 619 620 if (hdr->kv_flags & KV_FLAG_INVALID) 621 return (0); 622 623 /* The key might have been updated in the parent */ 624 if (hdr->kv_parent != NULL && hdr->kv_parent->kv_key != NULL) 625 key = hdr->kv_parent->kv_key; 626 else 627 key = hdr->kv_key; 628 629 val = hdr->kv_value; 630 631 if (strcasecmp(key, "Content-Length") == 0 || 632 strcasecmp(key, "Content-Type") == 0) { 633 if ((name = strdup(key)) == NULL) 634 return (-1); 635 } else { 636 if (asprintf(&name, "HTTP_%s", key) == -1) 637 return (-1); 638 } 639 640 for (p = name; *p != '\0'; p++) { 641 if (isalpha((unsigned char)*p)) 642 *p = toupper((unsigned char)*p); 643 else 644 *p = '_'; 645 } 646 647 ret = fcgi_add_param(param, name, val, clt); 648 free(name); 649 650 return (ret); 651} 652 653int 654server_fcgi_writechunk(struct client *clt) 655{ 656 struct evbuffer *evb = clt->clt_srvevb; 657 size_t len; 658 659 if (clt->clt_fcgi_type == FCGI_END_REQUEST) { 660 len = 0; 661 } else 662 len = EVBUFFER_LENGTH(evb); 663 664 /* If len is 0, make sure to write the end marker only once */ 665 if (len == 0 && clt->clt_fcgi_end++) 666 return (0); 667 668 if (clt->clt_fcgi_chunked) { 669 if (server_bufferevent_printf(clt, "%zx\r\n", len) == -1 || 670 server_bufferevent_write_chunk(clt, evb, len) == -1 || 671 server_bufferevent_print(clt, "\r\n") == -1) 672 return (-1); 673 } else 674 return (server_bufferevent_write_buffer(clt, evb)); 675 676 return (0); 677} 678 679int 680server_fcgi_getheaders(struct client *clt) 681{ 682 struct http_descriptor *resp = clt->clt_descresp; 683 struct evbuffer *evb = clt->clt_srvevb; 684 int code = 200; 685 char *line, *key, *value; 686 const char *errstr; 687 688 while ((line = evbuffer_getline(evb)) != NULL && *line != '\0') { 689 key = line; 690 691 if ((value = strchr(key, ':')) == NULL) 692 break; 693 if (*value == ':') { 694 *value++ = '\0'; 695 value += strspn(value, " \t"); 696 } else { 697 *value++ = '\0'; 698 } 699 700 DPRINTF("%s: %s: %s", __func__, key, value); 701 702 if (strcasecmp("Status", key) == 0) { 703 value[strcspn(value, " \t")] = '\0'; 704 code = (int)strtonum(value, 100, 600, &errstr); 705 if (errstr != NULL || server_httperror_byid( 706 code) == NULL) 707 code = 200; 708 } else { 709 (void)kv_add(&resp->http_headers, key, value); 710 } 711 free(line); 712 } 713 714 return (code); 715} 716