server_fcgi.c revision 1.54
1/* $OpenBSD: server_fcgi.c,v 1.54 2015/06/09 08:50:52 jung 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 } 216 217 /* 218 * calculate length of http SCRIPT_NAME: 219 * add length of stripped prefix, 220 * subtract length of prepended local root 221 */ 222 scriptlen += (stripped - alias) - strlen(srv_conf->root); 223 if ((str = strndup(alias, scriptlen)) == NULL) 224 goto fail; 225 ret = fcgi_add_param(¶m, "SCRIPT_NAME", str, clt); 226 free(str); 227 if (ret == -1) { 228 errstr = "failed to encode param"; 229 goto fail; 230 } 231 if (fcgi_add_param(¶m, "SCRIPT_FILENAME", script, clt) == -1) { 232 errstr = "failed to encode param"; 233 goto fail; 234 } 235 236 if (desc->http_query) 237 if (fcgi_add_param(¶m, "QUERY_STRING", desc->http_query, 238 clt) == -1) { 239 errstr = "failed to encode param"; 240 goto fail; 241 } 242 243 if (fcgi_add_param(¶m, "DOCUMENT_ROOT", srv_conf->root, 244 clt) == -1) { 245 errstr = "failed to encode param"; 246 goto fail; 247 } 248 if (fcgi_add_param(¶m, "DOCUMENT_URI", alias, 249 clt) == -1) { 250 errstr = "failed to encode param"; 251 goto fail; 252 } 253 if (fcgi_add_param(¶m, "GATEWAY_INTERFACE", "CGI/1.1", 254 clt) == -1) { 255 errstr = "failed to encode param"; 256 goto fail; 257 } 258 259 if (srv_conf->flags & SRVFLAG_AUTH) { 260 if (fcgi_add_param(¶m, "REMOTE_USER", 261 clt->clt_remote_user, clt) == -1) { 262 errstr = "failed to encode param"; 263 goto fail; 264 } 265 } 266 267 /* Add HTTP_* headers */ 268 if (server_headers(clt, desc, server_fcgi_writeheader, ¶m) == -1) { 269 errstr = "failed to encode param"; 270 goto fail; 271 } 272 273 if (srv_conf->flags & SRVFLAG_TLS) 274 if (fcgi_add_param(¶m, "HTTPS", "on", clt) == -1) { 275 errstr = "failed to encode param"; 276 goto fail; 277 } 278 279 (void)print_host(&clt->clt_ss, hbuf, sizeof(hbuf)); 280 if (fcgi_add_param(¶m, "REMOTE_ADDR", hbuf, clt) == -1) { 281 errstr = "failed to encode param"; 282 goto fail; 283 } 284 285 (void)snprintf(hbuf, sizeof(hbuf), "%d", ntohs(clt->clt_port)); 286 if (fcgi_add_param(¶m, "REMOTE_PORT", hbuf, clt) == -1) { 287 errstr = "failed to encode param"; 288 goto fail; 289 } 290 291 if (fcgi_add_param(¶m, "REQUEST_METHOD", 292 server_httpmethod_byid(desc->http_method), clt) == -1) { 293 errstr = "failed to encode param"; 294 goto fail; 295 } 296 297 if (!desc->http_query) { 298 if (fcgi_add_param(¶m, "REQUEST_URI", desc->http_path, 299 clt) == -1) { 300 errstr = "failed to encode param"; 301 goto fail; 302 } 303 } else if (asprintf(&str, "%s?%s", desc->http_path, 304 desc->http_query) != -1) { 305 ret = fcgi_add_param(¶m, "REQUEST_URI", str, clt); 306 free(str); 307 if (ret == -1) { 308 errstr = "failed to encode param"; 309 goto fail; 310 } 311 } 312 313 (void)print_host(&clt->clt_srv_ss, hbuf, sizeof(hbuf)); 314 if (fcgi_add_param(¶m, "SERVER_ADDR", hbuf, clt) == -1) { 315 errstr = "failed to encode param"; 316 goto fail; 317 } 318 319 (void)snprintf(hbuf, sizeof(hbuf), "%d", 320 ntohs(server_socket_getport(&clt->clt_srv_ss))); 321 if (fcgi_add_param(¶m, "SERVER_PORT", hbuf, clt) == -1) { 322 errstr = "failed to encode param"; 323 goto fail; 324 } 325 326 if (fcgi_add_param(¶m, "SERVER_NAME", srv_conf->name, 327 clt) == -1) { 328 errstr = "failed to encode param"; 329 goto fail; 330 } 331 332 if (fcgi_add_param(¶m, "SERVER_PROTOCOL", desc->http_version, 333 clt) == -1) { 334 errstr = "failed to encode param"; 335 goto fail; 336 } 337 338 if (fcgi_add_param(¶m, "SERVER_SOFTWARE", HTTPD_SERVERNAME, 339 clt) == -1) { 340 errstr = "failed to encode param"; 341 goto fail; 342 } 343 344 if (param.total_len != 0) { /* send last params record */ 345 bufferevent_write(clt->clt_srvbev, ¶m.buf, 346 sizeof(struct fcgi_record_header) + 347 ntohs(h->content_len)); 348 } 349 350 /* send "no more params" message */ 351 h->content_len = 0; 352 bufferevent_write(clt->clt_srvbev, ¶m.buf, 353 sizeof(struct fcgi_record_header)); 354 355 bufferevent_settimeout(clt->clt_srvbev, 356 srv_conf->timeout.tv_sec, srv_conf->timeout.tv_sec); 357 bufferevent_enable(clt->clt_srvbev, EV_READ|EV_WRITE); 358 if (clt->clt_toread != 0) { 359 server_read_httpcontent(clt->clt_bev, clt); 360 bufferevent_enable(clt->clt_bev, EV_READ); 361 } else { 362 bufferevent_disable(clt->clt_bev, EV_READ); 363 fcgi_add_stdin(clt, NULL); 364 } 365 366 if (strcmp(desc->http_version, "HTTP/1.1") == 0) { 367 clt->clt_fcgi_chunked = 1; 368 } else { 369 /* HTTP/1.0 does not support chunked encoding */ 370 clt->clt_fcgi_chunked = 0; 371 clt->clt_persist = 0; 372 } 373 clt->clt_fcgi_end = 0; 374 clt->clt_done = 0; 375 376 free(script); 377 return (0); 378 fail: 379 free(script); 380 if (errstr == NULL) 381 errstr = strerror(errno); 382 server_abort_http(clt, 500, errstr); 383 return (-1); 384} 385 386int 387fcgi_add_stdin(struct client *clt, struct evbuffer *evbuf) 388{ 389 struct fcgi_record_header h; 390 391 memset(&h, 0, sizeof(h)); 392 h.version = 1; 393 h.type = FCGI_STDIN; 394 h.id = htons(1); 395 h.padding_len = 0; 396 397 if (evbuf == NULL) { 398 h.content_len = 0; 399 return bufferevent_write(clt->clt_srvbev, &h, 400 sizeof(struct fcgi_record_header)); 401 } else { 402 h.content_len = htons(EVBUFFER_LENGTH(evbuf)); 403 if (bufferevent_write(clt->clt_srvbev, &h, 404 sizeof(struct fcgi_record_header)) == -1) 405 return -1; 406 return bufferevent_write_buffer(clt->clt_srvbev, evbuf); 407 } 408 return (0); 409} 410 411int 412fcgi_add_param(struct server_fcgi_param *p, const char *key, 413 const char *val, struct client *clt) 414{ 415 struct fcgi_record_header *h; 416 int len = 0; 417 int key_len = strlen(key); 418 int val_len = strlen(val); 419 uint8_t *param; 420 421 len += key_len + val_len; 422 len += key_len > 127 ? 4 : 1; 423 len += val_len > 127 ? 4 : 1; 424 425 DPRINTF("%s: %s[%d] => %s[%d], total_len: %d", __func__, key, key_len, 426 val, val_len, p->total_len); 427 428 if (len > FCGI_CONTENT_SIZE) 429 return (-1); 430 431 if (p->total_len + len > FCGI_CONTENT_SIZE) { 432 bufferevent_write(clt->clt_srvbev, p->buf, 433 sizeof(struct fcgi_record_header) + p->total_len); 434 p->total_len = 0; 435 } 436 437 h = (struct fcgi_record_header *)p->buf; 438 param = p->buf + sizeof(*h) + p->total_len; 439 440 if (key_len > 127) { 441 *param++ = ((key_len >> 24) & 0xff) | 0x80; 442 *param++ = ((key_len >> 16) & 0xff); 443 *param++ = ((key_len >> 8) & 0xff); 444 *param++ = (key_len & 0xff); 445 } else 446 *param++ = key_len; 447 448 if (val_len > 127) { 449 *param++ = ((val_len >> 24) & 0xff) | 0x80; 450 *param++ = ((val_len >> 16) & 0xff); 451 *param++ = ((val_len >> 8) & 0xff); 452 *param++ = (val_len & 0xff); 453 } else 454 *param++ = val_len; 455 456 memcpy(param, key, key_len); 457 param += key_len; 458 memcpy(param, val, val_len); 459 460 p->total_len += len; 461 462 h->content_len = htons(p->total_len); 463 return (0); 464} 465 466void 467server_fcgi_read(struct bufferevent *bev, void *arg) 468{ 469 uint8_t buf[FCGI_RECORD_SIZE]; 470 struct client *clt = (struct client *) arg; 471 struct fcgi_record_header *h; 472 size_t len; 473 char *ptr; 474 475 do { 476 len = bufferevent_read(bev, buf, clt->clt_fcgi_toread); 477 /* XXX error handling */ 478 evbuffer_add(clt->clt_srvevb, buf, len); 479 clt->clt_fcgi_toread -= len; 480 DPRINTF("%s: len: %lu toread: %d state: %d type: %d", 481 __func__, len, clt->clt_fcgi_toread, 482 clt->clt_fcgi_state, clt->clt_fcgi_type); 483 484 if (clt->clt_fcgi_toread != 0) 485 return; 486 487 switch (clt->clt_fcgi_state) { 488 case FCGI_READ_HEADER: 489 clt->clt_fcgi_state = FCGI_READ_CONTENT; 490 h = (struct fcgi_record_header *) 491 EVBUFFER_DATA(clt->clt_srvevb); 492 DPRINTF("%s: record header: version %d type %d id %d " 493 "content len %d padding %d", __func__, 494 h->version, h->type, ntohs(h->id), 495 ntohs(h->content_len), h->padding_len); 496 clt->clt_fcgi_type = h->type; 497 clt->clt_fcgi_toread = ntohs(h->content_len); 498 clt->clt_fcgi_padding_len = h->padding_len; 499 evbuffer_drain(clt->clt_srvevb, 500 EVBUFFER_LENGTH(clt->clt_srvevb)); 501 if (clt->clt_fcgi_toread != 0) 502 break; 503 else if (clt->clt_fcgi_type == FCGI_STDOUT && 504 !clt->clt_chunk) { 505 server_abort_http(clt, 500, "empty stdout"); 506 return; 507 } 508 509 /* fallthrough if content_len == 0 */ 510 case FCGI_READ_CONTENT: 511 switch (clt->clt_fcgi_type) { 512 case FCGI_STDERR: 513 if (EVBUFFER_LENGTH(clt->clt_srvevb) > 0 && 514 (ptr = get_string( 515 EVBUFFER_DATA(clt->clt_srvevb), 516 EVBUFFER_LENGTH(clt->clt_srvevb))) 517 != NULL) { 518 server_sendlog(clt->clt_srv_conf, 519 IMSG_LOG_ERROR, "%s", ptr); 520 free(ptr); 521 } 522 break; 523 case FCGI_STDOUT: 524 if (++clt->clt_chunk == 1) { 525 if (server_fcgi_header(clt, 526 server_fcgi_getheaders(clt)) 527 == -1) { 528 server_abort_http(clt, 500, 529 "malformed fcgi headers"); 530 return; 531 } 532 if (!EVBUFFER_LENGTH(clt->clt_srvevb)) 533 break; 534 } 535 /* FALLTHROUGH */ 536 case FCGI_END_REQUEST: 537 if (server_fcgi_writechunk(clt) == -1) { 538 server_abort_http(clt, 500, 539 "encoding error"); 540 return; 541 } 542 break; 543 } 544 evbuffer_drain(clt->clt_srvevb, 545 EVBUFFER_LENGTH(clt->clt_srvevb)); 546 if (!clt->clt_fcgi_padding_len) { 547 clt->clt_fcgi_state = FCGI_READ_HEADER; 548 clt->clt_fcgi_toread = 549 sizeof(struct fcgi_record_header); 550 } else { 551 clt->clt_fcgi_state = FCGI_READ_PADDING; 552 clt->clt_fcgi_toread = 553 clt->clt_fcgi_padding_len; 554 } 555 break; 556 case FCGI_READ_PADDING: 557 evbuffer_drain(clt->clt_srvevb, 558 EVBUFFER_LENGTH(clt->clt_srvevb)); 559 clt->clt_fcgi_state = FCGI_READ_HEADER; 560 clt->clt_fcgi_toread = 561 sizeof(struct fcgi_record_header); 562 break; 563 } 564 } while (len > 0); 565} 566 567int 568server_fcgi_header(struct client *clt, u_int code) 569{ 570 struct http_descriptor *desc = clt->clt_descreq; 571 struct http_descriptor *resp = clt->clt_descresp; 572 const char *error; 573 char tmbuf[32]; 574 struct kv *kv, key; 575 576 if (desc == NULL || (error = server_httperror_byid(code)) == NULL) 577 return (-1); 578 579 if (server_log_http(clt, code, 0) == -1) 580 return (-1); 581 582 /* Add error codes */ 583 if (kv_setkey(&resp->http_pathquery, "%lu", code) == -1 || 584 kv_set(&resp->http_pathquery, "%s", error) == -1) 585 return (-1); 586 587 /* Add headers */ 588 if (kv_add(&resp->http_headers, "Server", HTTPD_SERVERNAME) == NULL) 589 return (-1); 590 591 /* Set chunked encoding */ 592 if (clt->clt_fcgi_chunked) { 593 /* XXX Should we keep and handle Content-Length instead? */ 594 key.kv_key = "Content-Length"; 595 if ((kv = kv_find(&resp->http_headers, &key)) != NULL) 596 kv_delete(&resp->http_headers, kv); 597 598 /* 599 * XXX What if the FastCGI added some kind of Transfer-Encoding? 600 * XXX like gzip, deflate or even "chunked"? 601 */ 602 if (kv_add(&resp->http_headers, 603 "Transfer-Encoding", "chunked") == NULL) 604 return (-1); 605 } 606 607 /* Is it a persistent connection? */ 608 if (clt->clt_persist) { 609 if (kv_add(&resp->http_headers, 610 "Connection", "keep-alive") == NULL) 611 return (-1); 612 } else if (kv_add(&resp->http_headers, "Connection", "close") == NULL) 613 return (-1); 614 615 /* Date header is mandatory and should be added as late as possible */ 616 if (server_http_time(time(NULL), tmbuf, sizeof(tmbuf)) <= 0 || 617 kv_add(&resp->http_headers, "Date", tmbuf) == NULL) 618 return (-1); 619 620 /* Write initial header (fcgi might append more) */ 621 if (server_writeresponse_http(clt) == -1 || 622 server_bufferevent_print(clt, "\r\n") == -1 || 623 server_headers(clt, resp, server_writeheader_http, NULL) == -1 || 624 server_bufferevent_print(clt, "\r\n") == -1) 625 return (-1); 626 627 return (0); 628} 629 630int 631server_fcgi_writeheader(struct client *clt, struct kv *hdr, void *arg) 632{ 633 struct server_fcgi_param *param = arg; 634 char *val, *name, *p; 635 const char *key; 636 int ret; 637 638 if (hdr->kv_flags & KV_FLAG_INVALID) 639 return (0); 640 641 /* The key might have been updated in the parent */ 642 if (hdr->kv_parent != NULL && hdr->kv_parent->kv_key != NULL) 643 key = hdr->kv_parent->kv_key; 644 else 645 key = hdr->kv_key; 646 647 val = hdr->kv_value; 648 649 if (strcasecmp(key, "Content-Length") == 0 || 650 strcasecmp(key, "Content-Type") == 0) { 651 if ((name = strdup(key)) == NULL) 652 return (-1); 653 } else { 654 if (asprintf(&name, "HTTP_%s", key) == -1) 655 return (-1); 656 } 657 658 /* 659 * RFC 7230 defines a header field-name as a "token" and a "token" 660 * is defined as one or more characters for which isalpha or 661 * isdigit is true plus a list of additional characters. 662 * According to RFC 3875 a CGI environment variable is created 663 * by converting all letters to upper case and replacing '-' 664 * with '_'. 665 */ 666 for (p = name; *p != '\0'; p++) { 667 if (isalpha((unsigned char)*p)) 668 *p = toupper((unsigned char)*p); 669 else if (!(*p == '!' || *p == '#' || *p == '$' || *p == '%' || 670 *p == '&' || *p == '\'' || *p == '*' || *p == '+' || 671 *p == '.' || *p == '^' || *p == '_' || *p == '`' || 672 *p == '|' || *p == '~' || isdigit((unsigned char)*p))) 673 *p = '_'; 674 } 675 676 ret = fcgi_add_param(param, name, val, clt); 677 free(name); 678 679 return (ret); 680} 681 682int 683server_fcgi_writechunk(struct client *clt) 684{ 685 struct evbuffer *evb = clt->clt_srvevb; 686 size_t len; 687 688 if (clt->clt_fcgi_type == FCGI_END_REQUEST) { 689 len = 0; 690 } else 691 len = EVBUFFER_LENGTH(evb); 692 693 if (clt->clt_fcgi_chunked) { 694 /* If len is 0, make sure to write the end marker only once */ 695 if (len == 0 && clt->clt_fcgi_end++) 696 return (0); 697 if (server_bufferevent_printf(clt, "%zx\r\n", len) == -1 || 698 server_bufferevent_write_chunk(clt, evb, len) == -1 || 699 server_bufferevent_print(clt, "\r\n") == -1) 700 return (-1); 701 } else if (len) 702 return (server_bufferevent_write_buffer(clt, evb)); 703 704 return (0); 705} 706 707int 708server_fcgi_getheaders(struct client *clt) 709{ 710 struct http_descriptor *resp = clt->clt_descresp; 711 struct evbuffer *evb = clt->clt_srvevb; 712 int code = 200; 713 char *line, *key, *value; 714 const char *errstr; 715 716 while ((line = evbuffer_getline(evb)) != NULL && *line != '\0') { 717 key = line; 718 719 if ((value = strchr(key, ':')) == NULL) 720 break; 721 if (*value == ':') { 722 *value++ = '\0'; 723 value += strspn(value, " \t"); 724 } else { 725 *value++ = '\0'; 726 } 727 728 DPRINTF("%s: %s: %s", __func__, key, value); 729 730 if (strcasecmp("Status", key) == 0) { 731 value[strcspn(value, " \t")] = '\0'; 732 code = (int)strtonum(value, 100, 600, &errstr); 733 if (errstr != NULL || server_httperror_byid( 734 code) == NULL) 735 code = 200; 736 } else { 737 (void)kv_add(&resp->http_headers, key, value); 738 } 739 free(line); 740 } 741 742 return (code); 743} 744