server_fcgi.c revision 1.56
1/* $OpenBSD: server_fcgi.c,v 1.56 2015/07/18 16:42:39 blambert 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/time.h> 21#include <sys/socket.h> 22#include <sys/un.h> 23 24#include <netinet/in.h> 25#include <arpa/inet.h> 26 27#include <limits.h> 28#include <errno.h> 29#include <stdlib.h> 30#include <string.h> 31#include <stdio.h> 32#include <time.h> 33#include <ctype.h> 34#include <event.h> 35#include <unistd.h> 36 37#include "httpd.h" 38#include "http.h" 39 40#define FCGI_PADDING_SIZE 255 41#define FCGI_RECORD_SIZE \ 42 (sizeof(struct fcgi_record_header) + FCGI_CONTENT_SIZE + FCGI_PADDING_SIZE) 43 44#define FCGI_BEGIN_REQUEST 1 45#define FCGI_ABORT_REQUEST 2 46#define FCGI_END_REQUEST 3 47#define FCGI_PARAMS 4 48#define FCGI_STDIN 5 49#define FCGI_STDOUT 6 50#define FCGI_STDERR 7 51#define FCGI_DATA 8 52#define FCGI_GET_VALUES 9 53#define FCGI_GET_VALUES_RESULT 10 54#define FCGI_UNKNOWN_TYPE 11 55#define FCGI_MAXTYPE (FCGI_UNKNOWN_TYPE) 56 57#define FCGI_RESPONDER 1 58 59struct fcgi_record_header { 60 uint8_t version; 61 uint8_t type; 62 uint16_t id; 63 uint16_t content_len; 64 uint8_t padding_len; 65 uint8_t reserved; 66} __packed; 67 68struct fcgi_begin_request_body { 69 uint16_t role; 70 uint8_t flags; 71 uint8_t reserved[5]; 72} __packed; 73 74struct server_fcgi_param { 75 int total_len; 76 uint8_t buf[FCGI_RECORD_SIZE]; 77}; 78 79int server_fcgi_header(struct client *, u_int); 80void server_fcgi_read(struct bufferevent *, void *); 81int server_fcgi_writeheader(struct client *, struct kv *, void *); 82int server_fcgi_writechunk(struct client *); 83int server_fcgi_getheaders(struct client *); 84int fcgi_add_param(struct server_fcgi_param *, const char *, const char *, 85 struct client *); 86 87int 88server_fcgi(struct httpd *env, struct client *clt) 89{ 90 struct server_fcgi_param param; 91 struct server_config *srv_conf = clt->clt_srv_conf; 92 struct http_descriptor *desc = clt->clt_descreq; 93 struct fcgi_record_header *h; 94 struct fcgi_begin_request_body *begin; 95 char hbuf[HOST_NAME_MAX+1]; 96 size_t scriptlen; 97 int pathlen; 98 int fd = -1, ret; 99 const char *stripped, *p, *alias, *errstr = NULL; 100 char *str, *script = NULL; 101 102 if (srv_conf->socket[0] == ':') { 103 struct sockaddr_storage ss; 104 in_port_t port; 105 106 p = srv_conf->socket + 1; 107 108 port = strtonum(p, 0, 0xffff, &errstr); 109 if (errstr != NULL) { 110 log_warn("%s: strtonum %s, %s", __func__, p, errstr); 111 goto fail; 112 } 113 memset(&ss, 0, sizeof(ss)); 114 ss.ss_family = AF_INET; 115 ((struct sockaddr_in *) 116 &ss)->sin_addr.s_addr = htonl(INADDR_LOOPBACK); 117 port = htons(port); 118 119 if ((fd = server_socket_connect(&ss, port, srv_conf)) == -1) 120 goto fail; 121 } else { 122 struct sockaddr_un sun; 123 size_t len; 124 125 if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) 126 goto fail; 127 128 memset(&sun, 0, sizeof(sun)); 129 sun.sun_family = AF_UNIX; 130 len = strlcpy(sun.sun_path, 131 srv_conf->socket, sizeof(sun.sun_path)); 132 if (len >= sizeof(sun.sun_path)) { 133 errstr = "socket path to long"; 134 goto fail; 135 } 136 sun.sun_len = len; 137 138 if (connect(fd, (struct sockaddr *)&sun, sizeof(sun)) == -1) 139 goto fail; 140 } 141 142 socket_set_blockmode(fd, BM_NONBLOCK); 143 144 memset(hbuf, 0, sizeof(hbuf)); 145 clt->clt_fcgi_state = FCGI_READ_HEADER; 146 clt->clt_fcgi_toread = sizeof(struct fcgi_record_header); 147 148 if (clt->clt_srvevb != NULL) 149 evbuffer_free(clt->clt_srvevb); 150 151 clt->clt_srvevb = evbuffer_new(); 152 if (clt->clt_srvevb == NULL) { 153 errstr = "failed to allocate evbuffer"; 154 goto fail; 155 } 156 157 close(clt->clt_fd); 158 clt->clt_fd = fd; 159 160 if (clt->clt_srvbev != NULL) 161 bufferevent_free(clt->clt_srvbev); 162 163 clt->clt_srvbev = bufferevent_new(fd, server_fcgi_read, 164 NULL, server_file_error, clt); 165 if (clt->clt_srvbev == NULL) { 166 errstr = "failed to allocate fcgi buffer event"; 167 goto fail; 168 } 169 170 memset(¶m, 0, sizeof(param)); 171 172 h = (struct fcgi_record_header *)¶m.buf; 173 h->version = 1; 174 h->type = FCGI_BEGIN_REQUEST; 175 h->id = htons(1); 176 h->content_len = htons(sizeof(struct fcgi_begin_request_body)); 177 h->padding_len = 0; 178 179 begin = (struct fcgi_begin_request_body *)¶m.buf[sizeof(struct 180 fcgi_record_header)]; 181 begin->role = htons(FCGI_RESPONDER); 182 183 bufferevent_write(clt->clt_srvbev, ¶m.buf, 184 sizeof(struct fcgi_record_header) + 185 sizeof(struct fcgi_begin_request_body)); 186 187 h->type = FCGI_PARAMS; 188 h->content_len = param.total_len = 0; 189 190 alias = desc->http_path_alias != NULL 191 ? desc->http_path_alias 192 : desc->http_path; 193 194 stripped = server_root_strip(alias, srv_conf->strip); 195 if ((pathlen = asprintf(&script, "%s%s", srv_conf->root, stripped)) 196 == -1) { 197 errstr = "failed to get script name"; 198 goto fail; 199 } 200 201 scriptlen = path_info(script); 202 /* 203 * no part of root should show up in PATH_INFO. 204 * therefore scriptlen should be >= strlen(root) 205 */ 206 if (scriptlen < strlen(srv_conf->root)) 207 scriptlen = strlen(srv_conf->root); 208 if ((int)scriptlen < pathlen) { 209 if (fcgi_add_param(¶m, "PATH_INFO", 210 script + scriptlen, clt) == -1) { 211 errstr = "failed to encode param"; 212 goto fail; 213 } 214 script[scriptlen] = '\0'; 215 } else { 216 /* RFC 3875 mandates that PATH_INFO is empty if not set */ 217 if (fcgi_add_param(¶m, "PATH_INFO", "", clt) == -1) { 218 errstr = "failed to encode param"; 219 goto fail; 220 } 221 } 222 223 /* 224 * calculate length of http SCRIPT_NAME: 225 * add length of stripped prefix, 226 * subtract length of prepended local root 227 */ 228 scriptlen += (stripped - alias) - strlen(srv_conf->root); 229 if ((str = strndup(alias, scriptlen)) == NULL) 230 goto fail; 231 ret = fcgi_add_param(¶m, "SCRIPT_NAME", str, clt); 232 free(str); 233 if (ret == -1) { 234 errstr = "failed to encode param"; 235 goto fail; 236 } 237 if (fcgi_add_param(¶m, "SCRIPT_FILENAME", script, clt) == -1) { 238 errstr = "failed to encode param"; 239 goto fail; 240 } 241 242 if (desc->http_query) 243 if (fcgi_add_param(¶m, "QUERY_STRING", desc->http_query, 244 clt) == -1) { 245 errstr = "failed to encode param"; 246 goto fail; 247 } 248 249 if (fcgi_add_param(¶m, "DOCUMENT_ROOT", srv_conf->root, 250 clt) == -1) { 251 errstr = "failed to encode param"; 252 goto fail; 253 } 254 if (fcgi_add_param(¶m, "DOCUMENT_URI", alias, 255 clt) == -1) { 256 errstr = "failed to encode param"; 257 goto fail; 258 } 259 if (fcgi_add_param(¶m, "GATEWAY_INTERFACE", "CGI/1.1", 260 clt) == -1) { 261 errstr = "failed to encode param"; 262 goto fail; 263 } 264 265 if (srv_conf->flags & SRVFLAG_AUTH) { 266 if (fcgi_add_param(¶m, "REMOTE_USER", 267 clt->clt_remote_user, clt) == -1) { 268 errstr = "failed to encode param"; 269 goto fail; 270 } 271 } 272 273 /* Add HTTP_* headers */ 274 if (server_headers(clt, desc, server_fcgi_writeheader, ¶m) == -1) { 275 errstr = "failed to encode param"; 276 goto fail; 277 } 278 279 if (srv_conf->flags & SRVFLAG_TLS) 280 if (fcgi_add_param(¶m, "HTTPS", "on", clt) == -1) { 281 errstr = "failed to encode param"; 282 goto fail; 283 } 284 285 (void)print_host(&clt->clt_ss, hbuf, sizeof(hbuf)); 286 if (fcgi_add_param(¶m, "REMOTE_ADDR", hbuf, clt) == -1) { 287 errstr = "failed to encode param"; 288 goto fail; 289 } 290 291 (void)snprintf(hbuf, sizeof(hbuf), "%d", ntohs(clt->clt_port)); 292 if (fcgi_add_param(¶m, "REMOTE_PORT", hbuf, clt) == -1) { 293 errstr = "failed to encode param"; 294 goto fail; 295 } 296 297 if (fcgi_add_param(¶m, "REQUEST_METHOD", 298 server_httpmethod_byid(desc->http_method), clt) == -1) { 299 errstr = "failed to encode param"; 300 goto fail; 301 } 302 303 if (!desc->http_query) { 304 if (fcgi_add_param(¶m, "REQUEST_URI", desc->http_path, 305 clt) == -1) { 306 errstr = "failed to encode param"; 307 goto fail; 308 } 309 } else { 310 if (asprintf(&str, "%s?%s", desc->http_path, 311 desc->http_query) == -1) { 312 errstr = "failed to encode param"; 313 goto fail; 314 } 315 ret = fcgi_add_param(¶m, "REQUEST_URI", str, clt); 316 free(str); 317 if (ret == -1) { 318 errstr = "failed to encode param"; 319 goto fail; 320 } 321 } 322 323 (void)print_host(&clt->clt_srv_ss, hbuf, sizeof(hbuf)); 324 if (fcgi_add_param(¶m, "SERVER_ADDR", hbuf, clt) == -1) { 325 errstr = "failed to encode param"; 326 goto fail; 327 } 328 329 (void)snprintf(hbuf, sizeof(hbuf), "%d", 330 ntohs(server_socket_getport(&clt->clt_srv_ss))); 331 if (fcgi_add_param(¶m, "SERVER_PORT", hbuf, clt) == -1) { 332 errstr = "failed to encode param"; 333 goto fail; 334 } 335 336 if (fcgi_add_param(¶m, "SERVER_NAME", srv_conf->name, 337 clt) == -1) { 338 errstr = "failed to encode param"; 339 goto fail; 340 } 341 342 if (fcgi_add_param(¶m, "SERVER_PROTOCOL", desc->http_version, 343 clt) == -1) { 344 errstr = "failed to encode param"; 345 goto fail; 346 } 347 348 if (fcgi_add_param(¶m, "SERVER_SOFTWARE", HTTPD_SERVERNAME, 349 clt) == -1) { 350 errstr = "failed to encode param"; 351 goto fail; 352 } 353 354 if (param.total_len != 0) { /* send last params record */ 355 bufferevent_write(clt->clt_srvbev, ¶m.buf, 356 sizeof(struct fcgi_record_header) + 357 ntohs(h->content_len)); 358 } 359 360 /* send "no more params" message */ 361 h->content_len = 0; 362 bufferevent_write(clt->clt_srvbev, ¶m.buf, 363 sizeof(struct fcgi_record_header)); 364 365 bufferevent_settimeout(clt->clt_srvbev, 366 srv_conf->timeout.tv_sec, srv_conf->timeout.tv_sec); 367 bufferevent_enable(clt->clt_srvbev, EV_READ|EV_WRITE); 368 if (clt->clt_toread != 0) { 369 server_read_httpcontent(clt->clt_bev, clt); 370 bufferevent_enable(clt->clt_bev, EV_READ); 371 } else { 372 bufferevent_disable(clt->clt_bev, EV_READ); 373 fcgi_add_stdin(clt, NULL); 374 } 375 376 if (strcmp(desc->http_version, "HTTP/1.1") == 0) { 377 clt->clt_fcgi_chunked = 1; 378 } else { 379 /* HTTP/1.0 does not support chunked encoding */ 380 clt->clt_fcgi_chunked = 0; 381 clt->clt_persist = 0; 382 } 383 clt->clt_fcgi_end = 0; 384 clt->clt_done = 0; 385 386 free(script); 387 return (0); 388 fail: 389 free(script); 390 if (errstr == NULL) 391 errstr = strerror(errno); 392 server_abort_http(clt, 500, errstr); 393 return (-1); 394} 395 396int 397fcgi_add_stdin(struct client *clt, struct evbuffer *evbuf) 398{ 399 struct fcgi_record_header h; 400 401 memset(&h, 0, sizeof(h)); 402 h.version = 1; 403 h.type = FCGI_STDIN; 404 h.id = htons(1); 405 h.padding_len = 0; 406 407 if (evbuf == NULL) { 408 h.content_len = 0; 409 return bufferevent_write(clt->clt_srvbev, &h, 410 sizeof(struct fcgi_record_header)); 411 } else { 412 h.content_len = htons(EVBUFFER_LENGTH(evbuf)); 413 if (bufferevent_write(clt->clt_srvbev, &h, 414 sizeof(struct fcgi_record_header)) == -1) 415 return -1; 416 return bufferevent_write_buffer(clt->clt_srvbev, evbuf); 417 } 418 return (0); 419} 420 421int 422fcgi_add_param(struct server_fcgi_param *p, const char *key, 423 const char *val, struct client *clt) 424{ 425 struct fcgi_record_header *h; 426 int len = 0; 427 int key_len = strlen(key); 428 int val_len = strlen(val); 429 uint8_t *param; 430 431 len += key_len + val_len; 432 len += key_len > 127 ? 4 : 1; 433 len += val_len > 127 ? 4 : 1; 434 435 DPRINTF("%s: %s[%d] => %s[%d], total_len: %d", __func__, key, key_len, 436 val, val_len, p->total_len); 437 438 if (len > FCGI_CONTENT_SIZE) 439 return (-1); 440 441 if (p->total_len + len > FCGI_CONTENT_SIZE) { 442 bufferevent_write(clt->clt_srvbev, p->buf, 443 sizeof(struct fcgi_record_header) + p->total_len); 444 p->total_len = 0; 445 } 446 447 h = (struct fcgi_record_header *)p->buf; 448 param = p->buf + sizeof(*h) + p->total_len; 449 450 if (key_len > 127) { 451 *param++ = ((key_len >> 24) & 0xff) | 0x80; 452 *param++ = ((key_len >> 16) & 0xff); 453 *param++ = ((key_len >> 8) & 0xff); 454 *param++ = (key_len & 0xff); 455 } else 456 *param++ = key_len; 457 458 if (val_len > 127) { 459 *param++ = ((val_len >> 24) & 0xff) | 0x80; 460 *param++ = ((val_len >> 16) & 0xff); 461 *param++ = ((val_len >> 8) & 0xff); 462 *param++ = (val_len & 0xff); 463 } else 464 *param++ = val_len; 465 466 memcpy(param, key, key_len); 467 param += key_len; 468 memcpy(param, val, val_len); 469 470 p->total_len += len; 471 472 h->content_len = htons(p->total_len); 473 return (0); 474} 475 476void 477server_fcgi_read(struct bufferevent *bev, void *arg) 478{ 479 uint8_t buf[FCGI_RECORD_SIZE]; 480 struct client *clt = (struct client *) arg; 481 struct fcgi_record_header *h; 482 size_t len; 483 char *ptr; 484 485 do { 486 len = bufferevent_read(bev, buf, clt->clt_fcgi_toread); 487 /* XXX error handling */ 488 evbuffer_add(clt->clt_srvevb, buf, len); 489 clt->clt_fcgi_toread -= len; 490 DPRINTF("%s: len: %lu toread: %d state: %d type: %d", 491 __func__, len, clt->clt_fcgi_toread, 492 clt->clt_fcgi_state, clt->clt_fcgi_type); 493 494 if (clt->clt_fcgi_toread != 0) 495 return; 496 497 switch (clt->clt_fcgi_state) { 498 case FCGI_READ_HEADER: 499 clt->clt_fcgi_state = FCGI_READ_CONTENT; 500 h = (struct fcgi_record_header *) 501 EVBUFFER_DATA(clt->clt_srvevb); 502 DPRINTF("%s: record header: version %d type %d id %d " 503 "content len %d padding %d", __func__, 504 h->version, h->type, ntohs(h->id), 505 ntohs(h->content_len), h->padding_len); 506 clt->clt_fcgi_type = h->type; 507 clt->clt_fcgi_toread = ntohs(h->content_len); 508 clt->clt_fcgi_padding_len = h->padding_len; 509 evbuffer_drain(clt->clt_srvevb, 510 EVBUFFER_LENGTH(clt->clt_srvevb)); 511 if (clt->clt_fcgi_toread != 0) 512 break; 513 else if (clt->clt_fcgi_type == FCGI_STDOUT && 514 !clt->clt_chunk) { 515 server_abort_http(clt, 500, "empty stdout"); 516 return; 517 } 518 519 /* fallthrough if content_len == 0 */ 520 case FCGI_READ_CONTENT: 521 switch (clt->clt_fcgi_type) { 522 case FCGI_STDERR: 523 if (EVBUFFER_LENGTH(clt->clt_srvevb) > 0 && 524 (ptr = get_string( 525 EVBUFFER_DATA(clt->clt_srvevb), 526 EVBUFFER_LENGTH(clt->clt_srvevb))) 527 != NULL) { 528 server_sendlog(clt->clt_srv_conf, 529 IMSG_LOG_ERROR, "%s", ptr); 530 free(ptr); 531 } 532 break; 533 case FCGI_STDOUT: 534 if (++clt->clt_chunk == 1) { 535 if (server_fcgi_header(clt, 536 server_fcgi_getheaders(clt)) 537 == -1) { 538 server_abort_http(clt, 500, 539 "malformed fcgi headers"); 540 return; 541 } 542 if (!EVBUFFER_LENGTH(clt->clt_srvevb)) 543 break; 544 } 545 /* FALLTHROUGH */ 546 case FCGI_END_REQUEST: 547 if (server_fcgi_writechunk(clt) == -1) { 548 server_abort_http(clt, 500, 549 "encoding error"); 550 return; 551 } 552 break; 553 } 554 evbuffer_drain(clt->clt_srvevb, 555 EVBUFFER_LENGTH(clt->clt_srvevb)); 556 if (!clt->clt_fcgi_padding_len) { 557 clt->clt_fcgi_state = FCGI_READ_HEADER; 558 clt->clt_fcgi_toread = 559 sizeof(struct fcgi_record_header); 560 } else { 561 clt->clt_fcgi_state = FCGI_READ_PADDING; 562 clt->clt_fcgi_toread = 563 clt->clt_fcgi_padding_len; 564 } 565 break; 566 case FCGI_READ_PADDING: 567 evbuffer_drain(clt->clt_srvevb, 568 EVBUFFER_LENGTH(clt->clt_srvevb)); 569 clt->clt_fcgi_state = FCGI_READ_HEADER; 570 clt->clt_fcgi_toread = 571 sizeof(struct fcgi_record_header); 572 break; 573 } 574 } while (len > 0); 575} 576 577int 578server_fcgi_header(struct client *clt, u_int code) 579{ 580 struct http_descriptor *desc = clt->clt_descreq; 581 struct http_descriptor *resp = clt->clt_descresp; 582 const char *error; 583 char tmbuf[32]; 584 struct kv *kv, key; 585 586 if (desc == NULL || (error = server_httperror_byid(code)) == NULL) 587 return (-1); 588 589 if (server_log_http(clt, code, 0) == -1) 590 return (-1); 591 592 /* Add error codes */ 593 if (kv_setkey(&resp->http_pathquery, "%lu", code) == -1 || 594 kv_set(&resp->http_pathquery, "%s", error) == -1) 595 return (-1); 596 597 /* Add headers */ 598 if (kv_add(&resp->http_headers, "Server", HTTPD_SERVERNAME) == NULL) 599 return (-1); 600 601 /* Set chunked encoding */ 602 if (clt->clt_fcgi_chunked) { 603 /* XXX Should we keep and handle Content-Length instead? */ 604 key.kv_key = "Content-Length"; 605 if ((kv = kv_find(&resp->http_headers, &key)) != NULL) 606 kv_delete(&resp->http_headers, kv); 607 608 /* 609 * XXX What if the FastCGI added some kind of Transfer-Encoding? 610 * XXX like gzip, deflate or even "chunked"? 611 */ 612 if (kv_add(&resp->http_headers, 613 "Transfer-Encoding", "chunked") == NULL) 614 return (-1); 615 } 616 617 /* Is it a persistent connection? */ 618 if (clt->clt_persist) { 619 if (kv_add(&resp->http_headers, 620 "Connection", "keep-alive") == NULL) 621 return (-1); 622 } else if (kv_add(&resp->http_headers, "Connection", "close") == NULL) 623 return (-1); 624 625 /* Date header is mandatory and should be added as late as possible */ 626 if (server_http_time(time(NULL), tmbuf, sizeof(tmbuf)) <= 0 || 627 kv_add(&resp->http_headers, "Date", tmbuf) == NULL) 628 return (-1); 629 630 /* Write initial header (fcgi might append more) */ 631 if (server_writeresponse_http(clt) == -1 || 632 server_bufferevent_print(clt, "\r\n") == -1 || 633 server_headers(clt, resp, server_writeheader_http, NULL) == -1 || 634 server_bufferevent_print(clt, "\r\n") == -1) 635 return (-1); 636 637 return (0); 638} 639 640int 641server_fcgi_writeheader(struct client *clt, struct kv *hdr, void *arg) 642{ 643 struct server_fcgi_param *param = arg; 644 char *val, *name, *p; 645 const char *key; 646 int ret; 647 648 if (hdr->kv_flags & KV_FLAG_INVALID) 649 return (0); 650 651 /* The key might have been updated in the parent */ 652 if (hdr->kv_parent != NULL && hdr->kv_parent->kv_key != NULL) 653 key = hdr->kv_parent->kv_key; 654 else 655 key = hdr->kv_key; 656 657 val = hdr->kv_value; 658 659 if (strcasecmp(key, "Content-Length") == 0 || 660 strcasecmp(key, "Content-Type") == 0) { 661 if ((name = strdup(key)) == NULL) 662 return (-1); 663 } else { 664 if (asprintf(&name, "HTTP_%s", key) == -1) 665 return (-1); 666 } 667 668 /* 669 * RFC 7230 defines a header field-name as a "token" and a "token" 670 * is defined as one or more characters for which isalpha or 671 * isdigit is true plus a list of additional characters. 672 * According to RFC 3875 a CGI environment variable is created 673 * by converting all letters to upper case and replacing '-' 674 * with '_'. 675 */ 676 for (p = name; *p != '\0'; p++) { 677 if (isalpha((unsigned char)*p)) 678 *p = toupper((unsigned char)*p); 679 else if (!(*p == '!' || *p == '#' || *p == '$' || *p == '%' || 680 *p == '&' || *p == '\'' || *p == '*' || *p == '+' || 681 *p == '.' || *p == '^' || *p == '_' || *p == '`' || 682 *p == '|' || *p == '~' || isdigit((unsigned char)*p))) 683 *p = '_'; 684 } 685 686 ret = fcgi_add_param(param, name, val, clt); 687 free(name); 688 689 return (ret); 690} 691 692int 693server_fcgi_writechunk(struct client *clt) 694{ 695 struct evbuffer *evb = clt->clt_srvevb; 696 size_t len; 697 698 if (clt->clt_fcgi_type == FCGI_END_REQUEST) { 699 len = 0; 700 } else 701 len = EVBUFFER_LENGTH(evb); 702 703 if (clt->clt_fcgi_chunked) { 704 /* If len is 0, make sure to write the end marker only once */ 705 if (len == 0 && clt->clt_fcgi_end++) 706 return (0); 707 if (server_bufferevent_printf(clt, "%zx\r\n", len) == -1 || 708 server_bufferevent_write_chunk(clt, evb, len) == -1 || 709 server_bufferevent_print(clt, "\r\n") == -1) 710 return (-1); 711 } else if (len) 712 return (server_bufferevent_write_buffer(clt, evb)); 713 714 return (0); 715} 716 717int 718server_fcgi_getheaders(struct client *clt) 719{ 720 struct http_descriptor *resp = clt->clt_descresp; 721 struct evbuffer *evb = clt->clt_srvevb; 722 int code = 200; 723 char *line, *key, *value; 724 const char *errstr; 725 726 while ((line = evbuffer_getline(evb)) != NULL && *line != '\0') { 727 key = line; 728 729 if ((value = strchr(key, ':')) == NULL) 730 break; 731 if (*value == ':') { 732 *value++ = '\0'; 733 value += strspn(value, " \t"); 734 } else { 735 *value++ = '\0'; 736 } 737 738 DPRINTF("%s: %s: %s", __func__, key, value); 739 740 if (strcasecmp("Status", key) == 0) { 741 value[strcspn(value, " \t")] = '\0'; 742 code = (int)strtonum(value, 100, 600, &errstr); 743 if (errstr != NULL || server_httperror_byid( 744 code) == NULL) 745 code = 200; 746 } else { 747 (void)kv_add(&resp->http_headers, key, value); 748 } 749 free(line); 750 } 751 752 return (code); 753} 754