server_fcgi.c revision 1.44
1/* $OpenBSD: server_fcgi.c,v 1.44 2015/01/04 22:23:58 chrisz 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 *stripped, *p, *alias, *errstr = NULL; 105 char *str, *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 alias = desc->http_path_alias != NULL 194 ? desc->http_path_alias 195 : desc->http_path; 196 197 stripped = server_root_strip(alias, srv_conf->strip); 198 if ((pathlen = asprintf(&script, "%s%s", srv_conf->root, stripped)) 199 == -1) { 200 errstr = "failed to get script name"; 201 goto fail; 202 } 203 204 scriptlen = path_info(script); 205 /* 206 * no part of root should show up in PATH_INFO. 207 * therefore scriptlen should be >= strlen(root) 208 */ 209 if (scriptlen < strlen(srv_conf->root)) 210 scriptlen = strlen(srv_conf->root); 211 if ((int)scriptlen < pathlen) { 212 if (fcgi_add_param(¶m, "PATH_INFO", 213 script + scriptlen, clt) == -1) { 214 errstr = "failed to encode param"; 215 goto fail; 216 } 217 script[scriptlen] = '\0'; 218 } 219 220 /* 221 * calculate length of http SCRIPT_NAME: 222 * add length of stripped prefix, 223 * subtract length of prepended local root 224 */ 225 scriptlen += (stripped - alias) - strlen(srv_conf->root); 226 if ((str = strndup(alias, scriptlen)) == NULL) 227 goto fail; 228 ret = fcgi_add_param(¶m, "SCRIPT_NAME", str, clt); 229 free(str); 230 if (ret == -1) { 231 errstr = "failed to encode param"; 232 goto fail; 233 } 234 if (fcgi_add_param(¶m, "SCRIPT_FILENAME", script, clt) == -1) { 235 errstr = "failed to encode param"; 236 goto fail; 237 } 238 239 if (desc->http_query) 240 if (fcgi_add_param(¶m, "QUERY_STRING", desc->http_query, 241 clt) == -1) { 242 errstr = "failed to encode param"; 243 goto fail; 244 } 245 246 if (fcgi_add_param(¶m, "DOCUMENT_ROOT", srv_conf->root, 247 clt) == -1) { 248 errstr = "failed to encode param"; 249 goto fail; 250 } 251 if (fcgi_add_param(¶m, "DOCUMENT_URI", desc->http_path, 252 clt) == -1) { 253 errstr = "failed to encode param"; 254 goto fail; 255 } 256 if (fcgi_add_param(¶m, "GATEWAY_INTERFACE", "CGI/1.1", 257 clt) == -1) { 258 errstr = "failed to encode param"; 259 goto fail; 260 } 261 262 /* Add HTTP_* headers */ 263 if (server_headers(clt, desc, server_fcgi_writeheader, ¶m) == -1) { 264 errstr = "failed to encode param"; 265 goto fail; 266 } 267 268 if (srv_conf->flags & SRVFLAG_TLS) 269 if (fcgi_add_param(¶m, "HTTPS", "on", clt) == -1) { 270 errstr = "failed to encode param"; 271 goto fail; 272 } 273 274 (void)print_host(&clt->clt_ss, hbuf, sizeof(hbuf)); 275 if (fcgi_add_param(¶m, "REMOTE_ADDR", hbuf, clt) == -1) { 276 errstr = "failed to encode param"; 277 goto fail; 278 } 279 280 (void)snprintf(hbuf, sizeof(hbuf), "%d", ntohs(clt->clt_port)); 281 if (fcgi_add_param(¶m, "REMOTE_PORT", hbuf, clt) == -1) { 282 errstr = "failed to encode param"; 283 goto fail; 284 } 285 286 if (fcgi_add_param(¶m, "REQUEST_METHOD", 287 server_httpmethod_byid(desc->http_method), clt) == -1) { 288 errstr = "failed to encode param"; 289 goto fail; 290 } 291 292 if (!desc->http_query) { 293 if (fcgi_add_param(¶m, "REQUEST_URI", desc->http_path, 294 clt) == -1) { 295 errstr = "failed to encode param"; 296 goto fail; 297 } 298 } else if (asprintf(&str, "%s?%s", desc->http_path, 299 desc->http_query) != -1) { 300 ret = fcgi_add_param(¶m, "REQUEST_URI", str, clt); 301 free(str); 302 if (ret == -1) { 303 errstr = "failed to encode param"; 304 goto fail; 305 } 306 } 307 308 (void)print_host(&clt->clt_srv_ss, hbuf, sizeof(hbuf)); 309 if (fcgi_add_param(¶m, "SERVER_ADDR", hbuf, clt) == -1) { 310 errstr = "failed to encode param"; 311 goto fail; 312 } 313 314 (void)snprintf(hbuf, sizeof(hbuf), "%d", 315 ntohs(server_socket_getport(&clt->clt_srv_ss))); 316 if (fcgi_add_param(¶m, "SERVER_PORT", hbuf, clt) == -1) { 317 errstr = "failed to encode param"; 318 goto fail; 319 } 320 321 if (fcgi_add_param(¶m, "SERVER_NAME", srv_conf->name, 322 clt) == -1) { 323 errstr = "failed to encode param"; 324 goto fail; 325 } 326 327 if (fcgi_add_param(¶m, "SERVER_PROTOCOL", desc->http_version, 328 clt) == -1) { 329 errstr = "failed to encode param"; 330 goto fail; 331 } 332 333 if (fcgi_add_param(¶m, "SERVER_SOFTWARE", HTTPD_SERVERNAME, 334 clt) == -1) { 335 errstr = "failed to encode param"; 336 goto fail; 337 } 338 339 if (param.total_len != 0) { /* send last params record */ 340 bufferevent_write(clt->clt_srvbev, ¶m.buf, 341 sizeof(struct fcgi_record_header) + 342 ntohs(h->content_len)); 343 } 344 345 /* send "no more params" message */ 346 h->content_len = 0; 347 bufferevent_write(clt->clt_srvbev, ¶m.buf, 348 sizeof(struct fcgi_record_header)); 349 350 bufferevent_settimeout(clt->clt_srvbev, 351 srv_conf->timeout.tv_sec, srv_conf->timeout.tv_sec); 352 bufferevent_enable(clt->clt_srvbev, EV_READ|EV_WRITE); 353 if (clt->clt_toread != 0) { 354 server_read_httpcontent(clt->clt_bev, clt); 355 bufferevent_enable(clt->clt_bev, EV_READ); 356 } else { 357 bufferevent_disable(clt->clt_bev, EV_READ); 358 fcgi_add_stdin(clt, NULL); 359 } 360 361 if (strcmp(desc->http_version, "HTTP/1.1") == 0) { 362 clt->clt_fcgi_chunked = 1; 363 } else { 364 /* HTTP/1.0 does not support chunked encoding */ 365 clt->clt_fcgi_chunked = 0; 366 clt->clt_persist = 0; 367 } 368 clt->clt_fcgi_end = 0; 369 clt->clt_done = 0; 370 371 free(script); 372 return (0); 373 fail: 374 free(script); 375 if (errstr == NULL) 376 errstr = strerror(errno); 377 server_abort_http(clt, 500, errstr); 378 return (-1); 379} 380 381int 382fcgi_add_stdin(struct client *clt, struct evbuffer *evbuf) 383{ 384 struct fcgi_record_header h; 385 386 memset(&h, 0, sizeof(h)); 387 h.version = 1; 388 h.type = FCGI_STDIN; 389 h.id = htons(1); 390 h.padding_len = 0; 391 392 if (evbuf == NULL) { 393 h.content_len = 0; 394 return bufferevent_write(clt->clt_srvbev, &h, 395 sizeof(struct fcgi_record_header)); 396 } else { 397 h.content_len = htons(EVBUFFER_LENGTH(evbuf)); 398 if (bufferevent_write(clt->clt_srvbev, &h, 399 sizeof(struct fcgi_record_header)) == -1) 400 return -1; 401 return bufferevent_write_buffer(clt->clt_srvbev, evbuf); 402 } 403 return (0); 404} 405 406int 407fcgi_add_param(struct server_fcgi_param *p, const char *key, 408 const char *val, struct client *clt) 409{ 410 struct fcgi_record_header *h; 411 int len = 0; 412 int key_len = strlen(key); 413 int val_len = strlen(val); 414 uint8_t *param; 415 416 len += key_len + val_len; 417 len += key_len > 127 ? 4 : 1; 418 len += val_len > 127 ? 4 : 1; 419 420 DPRINTF("%s: %s[%d] => %s[%d], total_len: %d", __func__, key, key_len, 421 val, val_len, p->total_len); 422 423 if (len > FCGI_CONTENT_SIZE) 424 return (-1); 425 426 if (p->total_len + len > FCGI_CONTENT_SIZE) { 427 bufferevent_write(clt->clt_srvbev, p->buf, 428 sizeof(struct fcgi_record_header) + p->total_len); 429 p->total_len = 0; 430 } 431 432 h = (struct fcgi_record_header *)p->buf; 433 param = p->buf + sizeof(*h) + p->total_len; 434 435 if (key_len > 127) { 436 *param++ = ((key_len >> 24) & 0xff) | 0x80; 437 *param++ = ((key_len >> 16) & 0xff); 438 *param++ = ((key_len >> 8) & 0xff); 439 *param++ = (key_len & 0xff); 440 } else 441 *param++ = key_len; 442 443 if (val_len > 127) { 444 *param++ = ((val_len >> 24) & 0xff) | 0x80; 445 *param++ = ((val_len >> 16) & 0xff); 446 *param++ = ((val_len >> 8) & 0xff); 447 *param++ = (val_len & 0xff); 448 } else 449 *param++ = val_len; 450 451 memcpy(param, key, key_len); 452 param += key_len; 453 memcpy(param, val, val_len); 454 455 p->total_len += len; 456 457 h->content_len = htons(p->total_len); 458 return (0); 459} 460 461void 462server_fcgi_read(struct bufferevent *bev, void *arg) 463{ 464 uint8_t buf[FCGI_RECORD_SIZE]; 465 struct client *clt = (struct client *) arg; 466 struct fcgi_record_header *h; 467 size_t len; 468 char *ptr; 469 470 do { 471 len = bufferevent_read(bev, buf, clt->clt_fcgi_toread); 472 /* XXX error handling */ 473 evbuffer_add(clt->clt_srvevb, buf, len); 474 clt->clt_fcgi_toread -= len; 475 DPRINTF("%s: len: %lu toread: %d state: %d type: %d", 476 __func__, len, clt->clt_fcgi_toread, 477 clt->clt_fcgi_state, clt->clt_fcgi_type); 478 479 if (clt->clt_fcgi_toread != 0) 480 return; 481 482 switch (clt->clt_fcgi_state) { 483 case FCGI_READ_HEADER: 484 clt->clt_fcgi_state = FCGI_READ_CONTENT; 485 h = (struct fcgi_record_header *) 486 EVBUFFER_DATA(clt->clt_srvevb); 487 DPRINTF("%s: record header: version %d type %d id %d " 488 "content len %d padding %d", __func__, 489 h->version, h->type, ntohs(h->id), 490 ntohs(h->content_len), h->padding_len); 491 clt->clt_fcgi_type = h->type; 492 clt->clt_fcgi_toread = ntohs(h->content_len); 493 clt->clt_fcgi_padding_len = h->padding_len; 494 evbuffer_drain(clt->clt_srvevb, 495 EVBUFFER_LENGTH(clt->clt_srvevb)); 496 if (clt->clt_fcgi_toread != 0) 497 break; 498 else if (clt->clt_fcgi_type == FCGI_STDOUT && 499 !clt->clt_chunk) { 500 server_abort_http(clt, 500, "empty stdout"); 501 return; 502 } 503 504 /* fallthrough if content_len == 0 */ 505 case FCGI_READ_CONTENT: 506 switch (clt->clt_fcgi_type) { 507 case FCGI_STDERR: 508 if (EVBUFFER_LENGTH(clt->clt_srvevb) > 0 && 509 (ptr = get_string( 510 EVBUFFER_DATA(clt->clt_srvevb), 511 EVBUFFER_LENGTH(clt->clt_srvevb))) 512 != NULL) { 513 server_sendlog(clt->clt_srv_conf, 514 IMSG_LOG_ERROR, "%s", ptr); 515 free(ptr); 516 } 517 break; 518 case FCGI_STDOUT: 519 if (++clt->clt_chunk == 1) { 520 if (server_fcgi_header(clt, 521 server_fcgi_getheaders(clt)) 522 == -1) { 523 server_abort_http(clt, 500, 524 "malformed fcgi headers"); 525 return; 526 } 527 if (!EVBUFFER_LENGTH(clt->clt_srvevb)) 528 break; 529 } 530 /* FALLTHROUGH */ 531 case FCGI_END_REQUEST: 532 if (server_fcgi_writechunk(clt) == -1) { 533 server_abort_http(clt, 500, 534 "encoding error"); 535 return; 536 } 537 break; 538 } 539 evbuffer_drain(clt->clt_srvevb, 540 EVBUFFER_LENGTH(clt->clt_srvevb)); 541 if (!clt->clt_fcgi_padding_len) { 542 clt->clt_fcgi_state = FCGI_READ_HEADER; 543 clt->clt_fcgi_toread = 544 sizeof(struct fcgi_record_header); 545 } else { 546 clt->clt_fcgi_state = FCGI_READ_PADDING; 547 clt->clt_fcgi_toread = 548 clt->clt_fcgi_padding_len; 549 } 550 break; 551 case FCGI_READ_PADDING: 552 evbuffer_drain(clt->clt_srvevb, 553 EVBUFFER_LENGTH(clt->clt_srvevb)); 554 clt->clt_fcgi_state = FCGI_READ_HEADER; 555 clt->clt_fcgi_toread = 556 sizeof(struct fcgi_record_header); 557 break; 558 } 559 } while (len > 0); 560} 561 562int 563server_fcgi_header(struct client *clt, u_int code) 564{ 565 struct http_descriptor *desc = clt->clt_descreq; 566 struct http_descriptor *resp = clt->clt_descresp; 567 const char *error; 568 char tmbuf[32]; 569 struct kv *kv, key; 570 571 if (desc == NULL || (error = server_httperror_byid(code)) == NULL) 572 return (-1); 573 574 if (server_log_http(clt, code, 0) == -1) 575 return (-1); 576 577 /* Add error codes */ 578 if (kv_setkey(&resp->http_pathquery, "%lu", code) == -1 || 579 kv_set(&resp->http_pathquery, "%s", error) == -1) 580 return (-1); 581 582 /* Add headers */ 583 if (kv_add(&resp->http_headers, "Server", HTTPD_SERVERNAME) == NULL) 584 return (-1); 585 586 /* Set chunked encoding */ 587 if (clt->clt_fcgi_chunked) { 588 /* XXX Should we keep and handle Content-Length instead? */ 589 key.kv_key = "Content-Length"; 590 if ((kv = kv_find(&resp->http_headers, &key)) != NULL) 591 kv_delete(&resp->http_headers, kv); 592 593 /* 594 * XXX What if the FastCGI added some kind of Transfer-Encoding? 595 * XXX like gzip, deflate or even "chunked"? 596 */ 597 if (kv_add(&resp->http_headers, 598 "Transfer-Encoding", "chunked") == NULL) 599 return (-1); 600 } 601 602 /* Is it a persistent connection? */ 603 if (clt->clt_persist) { 604 if (kv_add(&resp->http_headers, 605 "Connection", "keep-alive") == NULL) 606 return (-1); 607 } else if (kv_add(&resp->http_headers, "Connection", "close") == NULL) 608 return (-1); 609 610 /* Date header is mandatory and should be added as late as possible */ 611 if (server_http_time(time(NULL), tmbuf, sizeof(tmbuf)) <= 0 || 612 kv_add(&resp->http_headers, "Date", tmbuf) == NULL) 613 return (-1); 614 615 /* Write initial header (fcgi might append more) */ 616 if (server_writeresponse_http(clt) == -1 || 617 server_bufferevent_print(clt, "\r\n") == -1 || 618 server_headers(clt, resp, server_writeheader_http, NULL) == -1 || 619 server_bufferevent_print(clt, "\r\n") == -1) 620 return (-1); 621 622 return (0); 623} 624 625int 626server_fcgi_writeheader(struct client *clt, struct kv *hdr, void *arg) 627{ 628 struct server_fcgi_param *param = arg; 629 char *val, *name, *p; 630 const char *key; 631 int ret; 632 633 if (hdr->kv_flags & KV_FLAG_INVALID) 634 return (0); 635 636 /* The key might have been updated in the parent */ 637 if (hdr->kv_parent != NULL && hdr->kv_parent->kv_key != NULL) 638 key = hdr->kv_parent->kv_key; 639 else 640 key = hdr->kv_key; 641 642 val = hdr->kv_value; 643 644 if (strcasecmp(key, "Content-Length") == 0 || 645 strcasecmp(key, "Content-Type") == 0) { 646 if ((name = strdup(key)) == NULL) 647 return (-1); 648 } else { 649 if (asprintf(&name, "HTTP_%s", key) == -1) 650 return (-1); 651 } 652 653 for (p = name; *p != '\0'; p++) { 654 if (isalpha((unsigned char)*p)) 655 *p = toupper((unsigned char)*p); 656 else 657 *p = '_'; 658 } 659 660 ret = fcgi_add_param(param, name, val, clt); 661 free(name); 662 663 return (ret); 664} 665 666int 667server_fcgi_writechunk(struct client *clt) 668{ 669 struct evbuffer *evb = clt->clt_srvevb; 670 size_t len; 671 672 if (clt->clt_fcgi_type == FCGI_END_REQUEST) { 673 len = 0; 674 } else 675 len = EVBUFFER_LENGTH(evb); 676 677 /* If len is 0, make sure to write the end marker only once */ 678 if (len == 0 && clt->clt_fcgi_end++) 679 return (0); 680 681 if (clt->clt_fcgi_chunked) { 682 if (server_bufferevent_printf(clt, "%zx\r\n", len) == -1 || 683 server_bufferevent_write_chunk(clt, evb, len) == -1 || 684 server_bufferevent_print(clt, "\r\n") == -1) 685 return (-1); 686 } else 687 return (server_bufferevent_write_buffer(clt, evb)); 688 689 return (0); 690} 691 692int 693server_fcgi_getheaders(struct client *clt) 694{ 695 struct http_descriptor *resp = clt->clt_descresp; 696 struct evbuffer *evb = clt->clt_srvevb; 697 int code = 200; 698 char *line, *key, *value; 699 const char *errstr; 700 701 while ((line = evbuffer_getline(evb)) != NULL && *line != '\0') { 702 key = line; 703 704 if ((value = strchr(key, ':')) == NULL) 705 break; 706 if (*value == ':') { 707 *value++ = '\0'; 708 value += strspn(value, " \t"); 709 } else { 710 *value++ = '\0'; 711 } 712 713 DPRINTF("%s: %s: %s", __func__, key, value); 714 715 if (strcasecmp("Status", key) == 0) { 716 value[strcspn(value, " \t")] = '\0'; 717 code = (int)strtonum(value, 100, 600, &errstr); 718 if (errstr != NULL || server_httperror_byid( 719 code) == NULL) 720 code = 200; 721 } else { 722 (void)kv_add(&resp->http_headers, key, value); 723 } 724 free(line); 725 } 726 727 return (code); 728} 729