1 /* Licensed to the Apache Software Foundation (ASF) under one or more
2 * contributor license agreements. See the NOTICE file distributed with
3 * this work for additional information regarding copyright ownership.
4 * The ASF licenses this file to You under the Apache License, Version 2.0
5 * (the "License"); you may not use this file except in compliance with
6 * the License. You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
18 * protocol.c --- routines which directly communicate with the client.
20 * Code originally by Rob McCool; much redone by Robert S. Thau
21 * and the Apache Software Foundation.
25 #include "apr_strings.h"
26 #include "apr_buckets.h"
28 #include "apr_signal.h"
29 #include "apr_strmatch.h"
31 #define APR_WANT_STDIO /* for sscanf */
32 #define APR_WANT_STRFUNC
33 #define APR_WANT_MEMFUNC
36 #include "util_filter.h"
37 #include "ap_config.h"
39 #include "http_config.h"
40 #include "http_core.h"
41 #include "http_protocol.h"
42 #include "http_main.h"
43 #include "http_request.h"
44 #include "http_vhost.h"
45 #include "http_log.h" /* For errors detected in basic auth common
48 #include "util_charset.h"
49 #include "util_ebcdic.h"
50 #include "scoreboard.h"
59 /* we know core's module_index is 0 */
60 #undef APLOG_MODULE_INDEX
61 #define APLOG_MODULE_INDEX AP_CORE_MODULE_INDEX
64 APR_HOOK_LINK(pre_read_request)
65 APR_HOOK_LINK(post_read_request)
66 APR_HOOK_LINK(log_transaction)
67 APR_HOOK_LINK(http_scheme)
68 APR_HOOK_LINK(default_port)
69 APR_HOOK_LINK(note_auth_failure)
72 AP_DECLARE_DATA ap_filter_rec_t *ap_old_write_func = NULL;
75 /* Patterns to match in ap_make_content_type() */
76 static const char *needcset[] = {
81 static const apr_strmatch_pattern **needcset_patterns;
82 static const apr_strmatch_pattern *charset_pattern;
84 AP_DECLARE(void) ap_setup_make_content_type(apr_pool_t *pool)
87 for (i = 0; needcset[i]; i++) {
90 needcset_patterns = (const apr_strmatch_pattern **)
91 apr_palloc(pool, (i + 1) * sizeof(apr_strmatch_pattern *));
92 for (i = 0; needcset[i]; i++) {
93 needcset_patterns[i] = apr_strmatch_precompile(pool, needcset[i], 0);
95 needcset_patterns[i] = NULL;
96 charset_pattern = apr_strmatch_precompile(pool, "charset=", 0);
100 * Builds the content-type that should be sent to the client from the
101 * content-type specified. The following rules are followed:
102 * - if type is NULL or "", return NULL (do not set content-type).
103 * - if charset adding is disabled, stop processing and return type.
104 * - then, if there are no parameters on type, add the default charset
107 AP_DECLARE(const char *)ap_make_content_type(request_rec *r, const char *type)
109 const apr_strmatch_pattern **pcset;
110 core_dir_config *conf =
111 (core_dir_config *)ap_get_core_module_config(r->per_dir_config);
112 core_request_config *request_conf;
115 if (!type || *type == '\0') {
119 if (conf->add_default_charset != ADD_DEFAULT_CHARSET_ON) {
123 request_conf = ap_get_core_module_config(r->request_config);
124 if (request_conf->suppress_charset) {
128 type_len = strlen(type);
130 if (apr_strmatch(charset_pattern, type, type_len) != NULL) {
131 /* already has parameter, do nothing */
132 /* XXX we don't check the validity */
136 /* see if it makes sense to add the charset. At present,
137 * we only add it if the Content-type is one of needcset[]
139 for (pcset = needcset_patterns; *pcset ; pcset++) {
140 if (apr_strmatch(*pcset, type, type_len) != NULL) {
141 struct iovec concat[3];
142 concat[0].iov_base = (void *)type;
143 concat[0].iov_len = type_len;
144 concat[1].iov_base = (void *)"; charset=";
145 concat[1].iov_len = sizeof("; charset=") - 1;
146 concat[2].iov_base = (void *)(conf->add_default_charset_name);
147 concat[2].iov_len = strlen(conf->add_default_charset_name);
148 type = apr_pstrcatv(r->pool, concat, 3, NULL);
157 AP_DECLARE(void) ap_set_content_length(request_rec *r, apr_off_t clength)
159 r->clength = clength;
160 apr_table_setn(r->headers_out, "Content-Length",
161 apr_off_t_toa(r->pool, clength));
165 * Return the latest rational time from a request/mtime (modification time)
166 * pair. We return the mtime unless it's in the future, in which case we
167 * return the current time. We use the request time as a reference in order
168 * to limit the number of calls to time(). We don't check for futurosity
169 * unless the mtime is at least as new as the reference.
171 AP_DECLARE(apr_time_t) ap_rationalize_mtime(request_rec *r, apr_time_t mtime)
175 /* For all static responses, it's almost certain that the file was
176 * last modified before the beginning of the request. So there's
177 * no reason to call time(NULL) again. But if the response has been
178 * created on demand, then it might be newer than the time the request
179 * started. In this event we really have to call time(NULL) again
180 * so that we can give the clients the most accurate Last-Modified. If we
181 * were given a time in the future, we return the current time - the
182 * Last-Modified can't be in the future.
184 now = (mtime < r->request_time) ? r->request_time : apr_time_now();
185 return (mtime > now) ? now : mtime;
188 /* Min # of bytes to allocate when reading a request line */
189 #define MIN_LINE_ALLOC 80
191 /* Get a line of protocol input, including any continuation lines
192 * caused by MIME folding (or broken clients) if fold != 0, and place it
193 * in the buffer s, of size n bytes, without the ending newline.
195 * If s is NULL, ap_rgetline_core will allocate necessary memory from r->pool.
197 * Returns APR_SUCCESS if there are no problems and sets *read to be
198 * the full length of s.
200 * APR_ENOSPC is returned if there is not enough buffer space.
201 * Other errors may be returned on other errors.
203 * The LF is *not* returned in the buffer. Therefore, a *read of 0
204 * indicates that an empty line was read.
206 * Notes: Because the buffer uses 1 char for NUL, the most we can return is
207 * (n - 1) actual characters.
209 * If no LF is detected on the last line due to a dropped connection
210 * or a full buffer, that's considered an error.
212 AP_DECLARE(apr_status_t) ap_rgetline_core(char **s, apr_size_t n,
213 apr_size_t *read, request_rec *r,
214 int fold, apr_bucket_brigade *bb)
218 apr_size_t bytes_handled = 0, current_alloc = 0;
219 char *pos, *last_char = *s;
220 int do_alloc = (*s == NULL), saw_eos = 0;
223 * Initialize last_char as otherwise a random value will be compared
224 * against APR_ASCII_LF at the end of the loop if bb only contains
225 * zero-length buckets.
231 apr_brigade_cleanup(bb);
232 rv = ap_get_brigade(r->input_filters, bb, AP_MODE_GETLINE,
234 if (rv != APR_SUCCESS) {
238 /* Something horribly wrong happened. Someone didn't block! */
239 if (APR_BRIGADE_EMPTY(bb)) {
243 for (e = APR_BRIGADE_FIRST(bb);
244 e != APR_BRIGADE_SENTINEL(bb);
245 e = APR_BUCKET_NEXT(e))
250 /* If we see an EOS, don't bother doing anything more. */
251 if (APR_BUCKET_IS_EOS(e)) {
256 rv = apr_bucket_read(e, &str, &len, APR_BLOCK_READ);
257 if (rv != APR_SUCCESS) {
262 /* no use attempting a zero-byte alloc (hurts when
263 * using --with-efence --enable-pool-debug) or
264 * doing any of the other logic either
269 /* Would this overrun our buffer? If so, we'll die. */
270 if (n < bytes_handled + len) {
271 *read = bytes_handled;
273 /* ensure this string is NUL terminated */
274 if (bytes_handled > 0) {
275 (*s)[bytes_handled-1] = '\0';
284 /* Do we have to handle the allocation ourselves? */
286 /* We'll assume the common case where one bucket is enough. */
289 if (current_alloc < MIN_LINE_ALLOC) {
290 current_alloc = MIN_LINE_ALLOC;
292 *s = apr_palloc(r->pool, current_alloc);
294 else if (bytes_handled + len > current_alloc) {
295 /* Increase the buffer size */
296 apr_size_t new_size = current_alloc * 2;
299 if (bytes_handled + len > new_size) {
300 new_size = (bytes_handled + len) * 2;
303 new_buffer = apr_palloc(r->pool, new_size);
305 /* Copy what we already had. */
306 memcpy(new_buffer, *s, bytes_handled);
307 current_alloc = new_size;
312 /* Just copy the rest of the data to the end of the old buffer. */
313 pos = *s + bytes_handled;
314 memcpy(pos, str, len);
315 last_char = pos + len - 1;
317 /* We've now processed that new data - update accordingly. */
318 bytes_handled += len;
321 /* If we got a full line of input, stop reading */
322 if (last_char && (*last_char == APR_ASCII_LF)) {
327 /* Now NUL-terminate the string at the end of the line;
328 * if the last-but-one character is a CR, terminate there */
329 if (last_char > *s && last_char[-1] == APR_ASCII_CR) {
333 bytes_handled = last_char - *s;
335 /* If we're folding, we have more work to do.
337 * Note that if an EOS was seen, we know we can't have another line.
339 if (fold && bytes_handled && !saw_eos) {
345 /* Clear the temp brigade for this filter read. */
346 apr_brigade_cleanup(bb);
348 /* We only care about the first byte. */
349 rv = ap_get_brigade(r->input_filters, bb, AP_MODE_SPECULATIVE,
351 if (rv != APR_SUCCESS) {
355 if (APR_BRIGADE_EMPTY(bb)) {
359 e = APR_BRIGADE_FIRST(bb);
361 /* If we see an EOS, don't bother doing anything more. */
362 if (APR_BUCKET_IS_EOS(e)) {
366 rv = apr_bucket_read(e, &str, &len, APR_BLOCK_READ);
367 if (rv != APR_SUCCESS) {
368 apr_brigade_cleanup(bb);
372 /* Found one, so call ourselves again to get the next line.
374 * FIXME: If the folding line is completely blank, should we
375 * stop folding? Does that require also looking at the next
378 /* When we call destroy, the buckets are deleted, so save that
379 * one character we need. This simplifies our execution paths
380 * at the cost of one character read.
383 if (c == APR_ASCII_BLANK || c == APR_ASCII_TAB) {
384 /* Do we have enough space? We may be full now. */
385 if (bytes_handled >= n) {
387 /* ensure this string is terminated */
392 apr_size_t next_size, next_len;
395 /* If we're doing the allocations for them, we have to
396 * give ourselves a NULL and copy it on return.
401 /* We're null terminated. */
405 next_size = n - bytes_handled;
407 rv = ap_rgetline_core(&tmp, next_size,
408 &next_len, r, 0, bb);
409 if (rv != APR_SUCCESS) {
413 if (do_alloc && next_len > 0) {
415 apr_size_t new_size = bytes_handled + next_len + 1;
417 /* we need to alloc an extra byte for a null */
418 new_buffer = apr_palloc(r->pool, new_size);
420 /* Copy what we already had. */
421 memcpy(new_buffer, *s, bytes_handled);
423 /* copy the new line, including the trailing null */
424 memcpy(new_buffer + bytes_handled, tmp, next_len + 1);
428 last_char += next_len;
429 bytes_handled += next_len;
432 else { /* next character is not tab or space */
437 *read = bytes_handled;
439 /* PR#43039: We shouldn't accept NULL bytes within the line */
440 if (strlen(*s) < bytes_handled) {
447 #if APR_CHARSET_EBCDIC
448 AP_DECLARE(apr_status_t) ap_rgetline(char **s, apr_size_t n,
449 apr_size_t *read, request_rec *r,
450 int fold, apr_bucket_brigade *bb)
452 /* on ASCII boxes, ap_rgetline is a macro which simply invokes
453 * ap_rgetline_core with the same parms
455 * on EBCDIC boxes, each complete http protocol input line needs to be
456 * translated into the code page used by the compiler. Since
457 * ap_rgetline_core uses recursion, we do the translation in a wrapper
458 * function to ensure that each input character gets translated only once.
462 rv = ap_rgetline_core(s, n, read, r, fold, bb);
463 if (rv == APR_SUCCESS) {
464 ap_xlate_proto_from_ascii(*s, *read);
470 AP_DECLARE(int) ap_getline(char *s, int n, request_rec *r, int fold)
475 apr_bucket_brigade *tmp_bb;
477 tmp_bb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
478 rv = ap_rgetline(&tmp_s, n, &len, r, fold, tmp_bb);
479 apr_brigade_destroy(tmp_bb);
481 /* Map the out-of-space condition to the old API. */
482 if (rv == APR_ENOSPC) {
486 /* Anything else is just bad. */
487 if (rv != APR_SUCCESS) {
494 /* parse_uri: break apart the uri
496 * - sets r->args to rest after '?' (or NULL if no '?')
497 * - sets r->uri to request uri (without r->args part)
498 * - sets r->hostname (if not set already) from request (scheme://host:port)
500 AP_CORE_DECLARE(void) ap_parse_uri(request_rec *r, const char *uri)
502 int status = HTTP_OK;
504 r->unparsed_uri = apr_pstrdup(r->pool, uri);
506 /* http://issues.apache.org/bugzilla/show_bug.cgi?id=31875
507 * http://issues.apache.org/bugzilla/show_bug.cgi?id=28450
509 * This is not in fact a URI, it's a path. That matters in the
510 * case of a leading double-slash. We need to resolve the issue
511 * by normalising that out before treating it as a URI.
513 while ((uri[0] == '/') && (uri[1] == '/')) {
516 if (r->method_number == M_CONNECT) {
517 status = apr_uri_parse_hostinfo(r->pool, uri, &r->parsed_uri);
520 status = apr_uri_parse(r->pool, uri, &r->parsed_uri);
523 if (status == APR_SUCCESS) {
524 /* if it has a scheme we may need to do absoluteURI vhost stuff */
525 if (r->parsed_uri.scheme
526 && !strcasecmp(r->parsed_uri.scheme, ap_http_scheme(r))) {
527 r->hostname = r->parsed_uri.hostname;
529 else if (r->method_number == M_CONNECT) {
530 r->hostname = r->parsed_uri.hostname;
533 r->args = r->parsed_uri.query;
534 r->uri = r->parsed_uri.path ? r->parsed_uri.path
535 : apr_pstrdup(r->pool, "/");
537 #if defined(OS2) || defined(WIN32)
538 /* Handle path translations for OS/2 and plug security hole.
539 * This will prevent "http://www.wherever.com/..\..\/" from
540 * returning a directory for the root drive.
545 for (x = r->uri; (x = strchr(x, '\\')) != NULL; )
548 #endif /* OS2 || WIN32 */
553 r->status = HTTP_BAD_REQUEST; /* set error status */
554 r->uri = apr_pstrdup(r->pool, uri);
558 static int read_request_line(request_rec *r, apr_bucket_brigade *bb)
564 int major = 1, minor = 0; /* Assume HTTP/1.0 if non-"HTTP" protocol */
567 int num_blank_lines = 0;
568 int max_blank_lines = r->server->limit_req_fields;
569 core_server_config *conf = ap_get_core_module_config(r->server->module_config);
570 int strict = conf->http_conformance & AP_HTTP_CONFORMANCE_STRICT;
571 int enforce_strict = !(conf->http_conformance & AP_HTTP_CONFORMANCE_LOGONLY);
573 if (max_blank_lines <= 0) {
574 max_blank_lines = DEFAULT_LIMIT_REQUEST_FIELDS;
577 /* Read past empty lines until we get a real request line,
578 * a read error, the connection closes (EOF), or we timeout.
580 * We skip empty lines because browsers have to tack a CRLF on to the end
581 * of POSTs to support old CERN webservers. But note that we may not
582 * have flushed any previous response completely to the client yet.
583 * We delay the flush as long as possible so that we can improve
584 * performance for clients that are pipelining requests. If a request
585 * is pipelined then we won't block during the (implicit) read() below.
586 * If the requests aren't pipelined, then the client is still waiting
587 * for the final buffer flush from us, and we will block in the implicit
588 * read(). B_SAFEREAD ensures that the BUFF layer flushes if it will
589 * have to block during a read.
595 /* ensure ap_rgetline allocates memory each time thru the loop
596 * if there are empty lines
598 r->the_request = NULL;
599 rv = ap_rgetline(&(r->the_request), (apr_size_t)(r->server->limit_req_line + 2),
602 if (rv != APR_SUCCESS) {
603 r->request_time = apr_time_now();
605 /* ap_rgetline returns APR_ENOSPC if it fills up the
606 * buffer before finding the end-of-line. This is only going to
607 * happen if it exceeds the configured limit for a request-line.
609 if (APR_STATUS_IS_ENOSPC(rv)) {
610 r->status = HTTP_REQUEST_URI_TOO_LARGE;
611 r->proto_num = HTTP_VERSION(1,0);
612 r->protocol = apr_pstrdup(r->pool, "HTTP/1.0");
614 else if (APR_STATUS_IS_TIMEUP(rv)) {
615 r->status = HTTP_REQUEST_TIME_OUT;
617 else if (APR_STATUS_IS_EINVAL(rv)) {
618 r->status = HTTP_BAD_REQUEST;
622 } while ((len <= 0) && (++num_blank_lines < max_blank_lines));
624 if (APLOGrtrace5(r)) {
625 ap_log_rerror(APLOG_MARK, APLOG_TRACE5, 0, r,
626 "Request received from client: %s",
627 ap_escape_logitem(r->pool, r->the_request));
630 r->request_time = apr_time_now();
632 r->method = ap_getword_white(r->pool, &ll);
634 uri = ap_getword_white(r->pool, &ll);
636 /* Provide quick information about the request method as soon as known */
638 r->method_number = ap_method_number_of(r->method);
639 if (r->method_number == M_GET && r->method[0] == 'H') {
643 ap_parse_uri(r, uri);
653 if (conf->http09_enable == AP_HTTP09_DISABLE) {
654 r->status = HTTP_VERSION_NOT_SUPPORTED;
655 r->protocol = apr_pstrmemdup(r->pool, pro, len);
656 /* If we deny 0.9, send error message with 1.x */
658 r->proto_num = HTTP_VERSION(0, 9);
659 r->connection->keepalive = AP_CONN_CLOSE;
660 ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02401)
661 "HTTP/0.9 denied by server configuration");
665 r->protocol = apr_pstrmemdup(r->pool, pro, len);
667 /* Avoid sscanf in the common case */
669 && pro[0] == 'H' && pro[1] == 'T' && pro[2] == 'T' && pro[3] == 'P'
670 && pro[4] == '/' && apr_isdigit(pro[5]) && pro[6] == '.'
671 && apr_isdigit(pro[7])) {
672 r->proto_num = HTTP_VERSION(pro[5] - '0', pro[7] - '0');
676 ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02418)
677 "Invalid protocol '%s'", r->protocol);
678 if (enforce_strict) {
679 r->status = HTTP_BAD_REQUEST;
683 if (3 == sscanf(r->protocol, "%4s/%u.%u", http, &major, &minor)
684 && (strcasecmp("http", http) == 0)
685 && (minor < HTTP_VERSION(1, 0)) ) { /* don't allow HTTP/0.1000 */
686 r->proto_num = HTTP_VERSION(major, minor);
689 r->proto_num = HTTP_VERSION(1, 0);
695 if (ap_has_cntrl(r->the_request)) {
696 ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02420)
697 "Request line must not contain control characters");
698 err = HTTP_BAD_REQUEST;
700 if (r->parsed_uri.fragment) {
701 /* RFC3986 3.5: no fragment */
702 ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02421)
703 "URI must not contain a fragment");
704 err = HTTP_BAD_REQUEST;
706 else if (r->parsed_uri.user || r->parsed_uri.password) {
707 ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02422)
708 "URI must not contain a username/password");
709 err = HTTP_BAD_REQUEST;
711 else if (r->method_number == M_INVALID) {
712 ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02423)
713 "Invalid HTTP method string: %s", r->method);
714 err = HTTP_NOT_IMPLEMENTED;
716 else if (r->assbackwards == 0 && r->proto_num < HTTP_VERSION(1, 0)) {
717 ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02424)
718 "HTTP/0.x does not take a protocol");
719 err = HTTP_BAD_REQUEST;
722 if (err && enforce_strict) {
731 static int table_do_fn_check_lengths(void *r_, const char *key,
735 if (value == NULL || r->server->limit_req_fieldsize >= strlen(value) )
738 r->status = HTTP_BAD_REQUEST;
739 apr_table_setn(r->notes, "error-notes",
740 apr_pstrcat(r->pool, "Size of a request header field "
741 "after merging exceeds server limit.<br />"
743 ap_escape_html(r->pool, key),
745 ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(00560) "Request header "
746 "exceeds LimitRequestFieldSize after merging: %s", key);
750 /* get the length of the field name for logging, but no more than 80 bytes */
751 #define LOG_NAME_MAX_LEN 80
752 static int field_name_len(const char *field)
754 const char *end = ap_strchr_c(field, ':');
755 if (end == NULL || end - field > LOG_NAME_MAX_LEN)
756 return LOG_NAME_MAX_LEN;
760 AP_DECLARE(void) ap_get_mime_headers_core(request_rec *r, apr_bucket_brigade *bb)
762 char *last_field = NULL;
763 apr_size_t last_len = 0;
764 apr_size_t alloc_len = 0;
770 core_server_config *conf = ap_get_core_module_config(r->server->module_config);
773 * Read header lines until we get the empty separator line, a read error,
774 * the connection closes (EOF), reach the server limit, or we timeout.
781 rv = ap_rgetline(&field, r->server->limit_req_fieldsize + 2,
784 if (rv != APR_SUCCESS) {
785 if (APR_STATUS_IS_TIMEUP(rv)) {
786 r->status = HTTP_REQUEST_TIME_OUT;
789 r->status = HTTP_BAD_REQUEST;
792 /* ap_rgetline returns APR_ENOSPC if it fills up the buffer before
793 * finding the end-of-line. This is only going to happen if it
794 * exceeds the configured limit for a field size.
796 if (rv == APR_ENOSPC) {
797 const char *field_escaped;
799 /* ensure ap_escape_html will terminate correctly */
800 field[len - 1] = '\0';
801 field_escaped = ap_escape_html(r->pool, field);
804 field_escaped = field = "";
807 apr_table_setn(r->notes, "error-notes",
808 apr_psprintf(r->pool,
809 "Size of a request header field "
810 "exceeds server limit.<br />\n"
811 "<pre>\n%.*s\n</pre>\n",
812 field_name_len(field_escaped),
814 ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(00561)
815 "Request header exceeds LimitRequestFieldSize%s"
818 field_name_len(field), field);
823 if (last_field != NULL) {
824 if ((len > 0) && ((*field == '\t') || *field == ' ')) {
825 /* This line is a continuation of the preceding line(s),
826 * so append it to the line that we've set aside.
827 * Note: this uses a power-of-two allocator to avoid
828 * doing O(n) allocs and using O(n^2) space for
829 * continuations that span many many lines.
831 apr_size_t fold_len = last_len + len + 1; /* trailing null */
833 if (fold_len >= (apr_size_t)(r->server->limit_req_fieldsize)) {
834 r->status = HTTP_BAD_REQUEST;
835 /* report what we have accumulated so far before the
836 * overflow (last_field) as the field with the problem
838 apr_table_setn(r->notes, "error-notes",
839 apr_psprintf(r->pool,
840 "Size of a request header field "
842 "exceeds server limit.<br />\n"
843 "<pre>\n%.*s\n</pre>\n",
844 field_name_len(last_field),
845 ap_escape_html(r->pool, last_field)));
846 ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(00562)
847 "Request header exceeds LimitRequestFieldSize "
848 "after folding: %.*s",
849 field_name_len(last_field), last_field);
853 if (fold_len > alloc_len) {
855 alloc_len += alloc_len;
856 if (fold_len > alloc_len) {
857 alloc_len = fold_len;
859 fold_buf = (char *)apr_palloc(r->pool, alloc_len);
860 memcpy(fold_buf, last_field, last_len);
861 last_field = fold_buf;
863 memcpy(last_field + last_len, field, len +1); /* +1 for nul */
867 else /* not a continuation line */ {
869 if (r->server->limit_req_fields
870 && (++fields_read > r->server->limit_req_fields)) {
871 r->status = HTTP_BAD_REQUEST;
872 apr_table_setn(r->notes, "error-notes",
873 "The number of request header fields "
874 "exceeds this server's limit.");
875 ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(00563)
876 "Number of request headers exceeds "
877 "LimitRequestFields");
881 if (!(value = strchr(last_field, ':'))) { /* Find ':' or */
882 r->status = HTTP_BAD_REQUEST; /* abort bad request */
883 apr_table_setn(r->notes, "error-notes",
884 apr_psprintf(r->pool,
885 "Request header field is "
886 "missing ':' separator.<br />\n"
887 "<pre>\n%.*s</pre>\n",
888 (int)LOG_NAME_MAX_LEN,
889 ap_escape_html(r->pool,
891 ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(00564)
892 "Request header field is missing ':' "
893 "separator: %.*s", (int)LOG_NAME_MAX_LEN,
898 tmp_field = value - 1; /* last character of field-name */
900 *value++ = '\0'; /* NUL-terminate at colon */
902 while (*value == ' ' || *value == '\t') {
903 ++value; /* Skip to start of value */
906 /* Strip LWS after field-name: */
907 while (tmp_field > last_field
908 && (*tmp_field == ' ' || *tmp_field == '\t')) {
912 /* Strip LWS after field-value: */
913 tmp_field = last_field + last_len - 1;
914 while (tmp_field > value
915 && (*tmp_field == ' ' || *tmp_field == '\t')) {
919 if (conf->http_conformance & AP_HTTP_CONFORMANCE_STRICT) {
922 if (*last_field == '\0') {
923 err = HTTP_BAD_REQUEST;
924 ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(02425)
925 "Empty request header field name not allowed");
927 else if (ap_has_cntrl(last_field)) {
928 err = HTTP_BAD_REQUEST;
929 ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(02426)
930 "[HTTP strict] Request header field name contains "
931 "control character: %.*s",
932 (int)LOG_NAME_MAX_LEN, last_field);
934 else if (ap_has_cntrl(value)) {
935 err = HTTP_BAD_REQUEST;
936 ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(02427)
937 "Request header field '%.*s' contains"
938 "control character", (int)LOG_NAME_MAX_LEN,
941 if (err && !(conf->http_conformance & AP_HTTP_CONFORMANCE_LOGONLY)) {
946 apr_table_addn(r->headers_in, last_field, value);
948 /* reset the alloc_len so that we'll allocate a new
949 * buffer if we have to do any more folding: we can't
950 * use the previous buffer because its contents are
951 * now part of r->headers_in
955 } /* end if current line is not a continuation starting with tab */
958 /* Found a blank line, stop. */
963 /* Keep track of this line so that we can parse it on
964 * the next loop iteration. (In the folded case, last_field
965 * has been updated already.)
973 /* Combine multiple message-header fields with the same
974 * field-name, following RFC 2616, 4.2.
976 apr_table_compress(r->headers_in, APR_OVERLAP_TABLES_MERGE);
978 /* enforce LimitRequestFieldSize for merged headers */
979 apr_table_do(table_do_fn_check_lengths, r, r->headers_in, NULL);
982 AP_DECLARE(void) ap_get_mime_headers(request_rec *r)
984 apr_bucket_brigade *tmp_bb;
985 tmp_bb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
986 ap_get_mime_headers_core(r, tmp_bb);
987 apr_brigade_destroy(tmp_bb);
990 request_rec *ap_read_request(conn_rec *conn)
996 apr_bucket_brigade *tmp_bb;
998 apr_interval_time_t cur_timeout;
1001 apr_pool_create(&p, conn->pool);
1002 apr_pool_tag(p, "request");
1003 r = apr_pcalloc(p, sizeof(request_rec));
1004 AP_READ_REQUEST_ENTRY((intptr_t)r, (uintptr_t)conn);
1006 r->connection = conn;
1007 r->server = conn->base_server;
1010 r->ap_auth_type = NULL;
1012 r->allowed_methods = ap_make_method_list(p, 2);
1014 r->headers_in = apr_table_make(r->pool, 25);
1015 r->subprocess_env = apr_table_make(r->pool, 25);
1016 r->headers_out = apr_table_make(r->pool, 12);
1017 r->err_headers_out = apr_table_make(r->pool, 5);
1018 r->notes = apr_table_make(r->pool, 5);
1020 r->request_config = ap_create_request_config(r->pool);
1021 /* Must be set before we run create request hook */
1023 r->proto_output_filters = conn->output_filters;
1024 r->output_filters = r->proto_output_filters;
1025 r->proto_input_filters = conn->input_filters;
1026 r->input_filters = r->proto_input_filters;
1027 ap_run_create_request(r);
1028 r->per_dir_config = r->server->lookup_defaults;
1030 r->sent_bodyct = 0; /* bytect isn't for body */
1033 r->read_body = REQUEST_NO_BODY;
1035 r->status = HTTP_OK; /* Until further notice */
1036 r->the_request = NULL;
1038 /* Begin by presuming any module can make its own path_info assumptions,
1039 * until some module interjects and changes the value.
1041 r->used_path_info = AP_REQ_DEFAULT_PATH_INFO;
1043 r->useragent_addr = conn->client_addr;
1044 r->useragent_ip = conn->client_ip;
1046 tmp_bb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
1048 ap_run_pre_read_request(r, conn);
1050 /* Get the request... */
1051 if (!read_request_line(r, tmp_bb)) {
1052 switch (r->status) {
1053 case HTTP_REQUEST_URI_TOO_LARGE:
1054 case HTTP_BAD_REQUEST:
1055 case HTTP_VERSION_NOT_SUPPORTED:
1056 case HTTP_NOT_IMPLEMENTED:
1057 if (r->status == HTTP_REQUEST_URI_TOO_LARGE) {
1058 ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(00565)
1059 "request failed: URI too long (longer than %d)",
1060 r->server->limit_req_line);
1062 else if (r->method == NULL) {
1063 ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(00566)
1064 "request failed: invalid characters in URI");
1066 ap_send_error_response(r, 0);
1067 ap_update_child_status(conn->sbh, SERVER_BUSY_LOG, r);
1068 ap_run_log_transaction(r);
1069 apr_brigade_destroy(tmp_bb);
1071 case HTTP_REQUEST_TIME_OUT:
1072 ap_update_child_status(conn->sbh, SERVER_BUSY_LOG, r);
1073 if (!r->connection->keepalives)
1074 ap_run_log_transaction(r);
1075 apr_brigade_destroy(tmp_bb);
1078 apr_brigade_destroy(tmp_bb);
1084 /* We may have been in keep_alive_timeout mode, so toggle back
1085 * to the normal timeout mode as we fetch the header lines,
1088 csd = ap_get_conn_socket(conn);
1089 apr_socket_timeout_get(csd, &cur_timeout);
1090 if (cur_timeout != conn->base_server->timeout) {
1091 apr_socket_timeout_set(csd, conn->base_server->timeout);
1092 cur_timeout = conn->base_server->timeout;
1095 if (!r->assbackwards) {
1096 ap_get_mime_headers_core(r, tmp_bb);
1097 if (r->status != HTTP_OK) {
1098 ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(00567)
1099 "request failed: error reading the headers");
1100 ap_send_error_response(r, 0);
1101 ap_update_child_status(conn->sbh, SERVER_BUSY_LOG, r);
1102 ap_run_log_transaction(r);
1103 apr_brigade_destroy(tmp_bb);
1107 if (apr_table_get(r->headers_in, "Transfer-Encoding")
1108 && apr_table_get(r->headers_in, "Content-Length")) {
1109 /* 2616 section 4.4, point 3: "if both Transfer-Encoding
1110 * and Content-Length are received, the latter MUST be
1111 * ignored"; so unset it here to prevent any confusion
1113 apr_table_unset(r->headers_in, "Content-Length");
1117 if (r->header_only) {
1119 * Client asked for headers only with HTTP/0.9, which doesn't send
1120 * headers! Have to dink things just to make sure the error message
1123 ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(00568)
1124 "client sent invalid HTTP/0.9 request: HEAD %s",
1127 r->status = HTTP_BAD_REQUEST;
1128 ap_send_error_response(r, 0);
1129 ap_update_child_status(conn->sbh, SERVER_BUSY_LOG, r);
1130 ap_run_log_transaction(r);
1131 apr_brigade_destroy(tmp_bb);
1136 apr_brigade_destroy(tmp_bb);
1138 /* update what we think the virtual host is based on the headers we've
1139 * now read. may update status.
1141 ap_update_vhost_from_headers(r);
1142 access_status = r->status;
1144 /* Toggle to the Host:-based vhost's timeout mode to fetch the
1145 * request body and send the response body, if needed.
1147 if (cur_timeout != r->server->timeout) {
1148 apr_socket_timeout_set(csd, r->server->timeout);
1149 cur_timeout = r->server->timeout;
1152 /* we may have switched to another server */
1153 r->per_dir_config = r->server->lookup_defaults;
1155 if ((!r->hostname && (r->proto_num >= HTTP_VERSION(1, 1)))
1156 || ((r->proto_num == HTTP_VERSION(1, 1))
1157 && !apr_table_get(r->headers_in, "Host"))) {
1159 * Client sent us an HTTP/1.1 or later request without telling us the
1160 * hostname, either with a full URL or a Host: header. We therefore
1161 * need to (as per the 1.1 spec) send an error. As a special case,
1162 * HTTP/1.1 mentions twice (S9, S14.23) that a request MUST contain
1163 * a Host: header, and the server MUST respond with 400 if it doesn't.
1165 access_status = HTTP_BAD_REQUEST;
1166 ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(00569)
1167 "client sent HTTP/1.1 request without hostname "
1168 "(see RFC2616 section 14.23): %s", r->uri);
1172 * Add the HTTP_IN filter here to ensure that ap_discard_request_body
1173 * called by ap_die and by ap_send_error_response works correctly on
1174 * status codes that do not cause the connection to be dropped and
1175 * in situations where the connection should be kept alive.
1178 ap_add_input_filter_handle(ap_http_input_filter_handle,
1179 NULL, r, r->connection);
1181 if (access_status != HTTP_OK
1182 || (access_status = ap_run_post_read_request(r))) {
1183 ap_die(access_status, r);
1184 ap_update_child_status(conn->sbh, SERVER_BUSY_LOG, r);
1185 ap_run_log_transaction(r);
1190 if (((expect = apr_table_get(r->headers_in, "Expect")) != NULL)
1191 && (expect[0] != '\0')) {
1193 * The Expect header field was added to HTTP/1.1 after RFC 2068
1194 * as a means to signal when a 100 response is desired and,
1195 * unfortunately, to signal a poor man's mandatory extension that
1196 * the server must understand or return 417 Expectation Failed.
1198 if (strcasecmp(expect, "100-continue") == 0) {
1199 r->expecting_100 = 1;
1202 r->status = HTTP_EXPECTATION_FAILED;
1203 ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(00570)
1204 "client sent an unrecognized expectation value of "
1205 "Expect: %s", expect);
1206 ap_send_error_response(r, 0);
1207 ap_update_child_status(conn->sbh, SERVER_BUSY_LOG, r);
1208 ap_run_log_transaction(r);
1213 AP_READ_REQUEST_SUCCESS((uintptr_t)r, (char *)r->method, (char *)r->uri, (char *)r->server->defn_name, r->status);
1216 AP_READ_REQUEST_FAILURE((uintptr_t)r);
1220 /* if a request with a body creates a subrequest, remove original request's
1221 * input headers which pertain to the body which has already been read.
1222 * out-of-line helper function for ap_set_sub_req_protocol.
1225 static void strip_headers_request_body(request_rec *rnew)
1227 apr_table_unset(rnew->headers_in, "Content-Encoding");
1228 apr_table_unset(rnew->headers_in, "Content-Language");
1229 apr_table_unset(rnew->headers_in, "Content-Length");
1230 apr_table_unset(rnew->headers_in, "Content-Location");
1231 apr_table_unset(rnew->headers_in, "Content-MD5");
1232 apr_table_unset(rnew->headers_in, "Content-Range");
1233 apr_table_unset(rnew->headers_in, "Content-Type");
1234 apr_table_unset(rnew->headers_in, "Expires");
1235 apr_table_unset(rnew->headers_in, "Last-Modified");
1236 apr_table_unset(rnew->headers_in, "Transfer-Encoding");
1240 * A couple of other functions which initialize some of the fields of
1241 * a request structure, as appropriate for adjuncts of one kind or another
1242 * to a request in progress. Best here, rather than elsewhere, since
1243 * *someone* has to set the protocol-specific fields...
1246 AP_DECLARE(void) ap_set_sub_req_protocol(request_rec *rnew,
1247 const request_rec *r)
1249 rnew->the_request = r->the_request; /* Keep original request-line */
1251 rnew->assbackwards = 1; /* Don't send headers from this. */
1252 rnew->no_local_copy = 1; /* Don't try to send HTTP_NOT_MODIFIED for a
1254 rnew->method = "GET";
1255 rnew->method_number = M_GET;
1256 rnew->protocol = "INCLUDED";
1258 rnew->status = HTTP_OK;
1260 rnew->headers_in = apr_table_copy(rnew->pool, r->headers_in);
1262 /* did the original request have a body? (e.g. POST w/SSI tags)
1263 * if so, make sure the subrequest doesn't inherit body headers
1265 if (!r->kept_body && (apr_table_get(r->headers_in, "Content-Length")
1266 || apr_table_get(r->headers_in, "Transfer-Encoding"))) {
1267 strip_headers_request_body(rnew);
1269 rnew->subprocess_env = apr_table_copy(rnew->pool, r->subprocess_env);
1270 rnew->headers_out = apr_table_make(rnew->pool, 5);
1271 rnew->err_headers_out = apr_table_make(rnew->pool, 5);
1272 rnew->notes = apr_table_make(rnew->pool, 5);
1274 rnew->expecting_100 = r->expecting_100;
1275 rnew->read_length = r->read_length;
1276 rnew->read_body = REQUEST_NO_BODY;
1278 rnew->main = (request_rec *) r;
1281 static void end_output_stream(request_rec *r)
1283 conn_rec *c = r->connection;
1284 apr_bucket_brigade *bb;
1287 bb = apr_brigade_create(r->pool, c->bucket_alloc);
1288 b = apr_bucket_eos_create(c->bucket_alloc);
1289 APR_BRIGADE_INSERT_TAIL(bb, b);
1290 ap_pass_brigade(r->output_filters, bb);
1293 AP_DECLARE(void) ap_finalize_sub_req_protocol(request_rec *sub)
1295 /* tell the filter chain there is no more content coming */
1296 if (!sub->eos_sent) {
1297 end_output_stream(sub);
1301 /* finalize_request_protocol is called at completion of sending the
1302 * response. Its sole purpose is to send the terminating protocol
1303 * information for any wrappers around the response message body
1304 * (i.e., transfer encodings). It should have been named finalize_response.
1306 AP_DECLARE(void) ap_finalize_request_protocol(request_rec *r)
1308 (void) ap_discard_request_body(r);
1310 /* tell the filter chain there is no more content coming */
1312 end_output_stream(r);
1317 * Support for the Basic authentication protocol, and a bit for Digest.
1319 AP_DECLARE(void) ap_note_auth_failure(request_rec *r)
1321 const char *type = ap_auth_type(r);
1323 ap_run_note_auth_failure(r, type);
1326 ap_log_rerror(APLOG_MARK, APLOG_ERR,
1327 0, r, APLOGNO(00571) "need AuthType to note auth failure: %s", r->uri);
1331 AP_DECLARE(void) ap_note_basic_auth_failure(request_rec *r)
1333 ap_note_auth_failure(r);
1336 AP_DECLARE(void) ap_note_digest_auth_failure(request_rec *r)
1338 ap_note_auth_failure(r);
1341 AP_DECLARE(int) ap_get_basic_auth_pw(request_rec *r, const char **pw)
1343 const char *auth_line = apr_table_get(r->headers_in,
1344 (PROXYREQ_PROXY == r->proxyreq)
1345 ? "Proxy-Authorization"
1349 if (!(t = ap_auth_type(r)) || strcasecmp(t, "Basic"))
1352 if (!ap_auth_name(r)) {
1353 ap_log_rerror(APLOG_MARK, APLOG_ERR,
1354 0, r, APLOGNO(00572) "need AuthName: %s", r->uri);
1355 return HTTP_INTERNAL_SERVER_ERROR;
1359 ap_note_auth_failure(r);
1360 return HTTP_UNAUTHORIZED;
1363 if (strcasecmp(ap_getword(r->pool, &auth_line, ' '), "Basic")) {
1364 /* Client tried to authenticate using wrong auth scheme */
1365 ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(00573)
1366 "client used wrong authentication scheme: %s", r->uri);
1367 ap_note_auth_failure(r);
1368 return HTTP_UNAUTHORIZED;
1371 while (*auth_line == ' ' || *auth_line == '\t') {
1375 t = ap_pbase64decode(r->pool, auth_line);
1376 r->user = ap_getword_nulls (r->pool, &t, ':');
1377 r->ap_auth_type = "Basic";
1384 struct content_length_ctx {
1385 int data_sent; /* true if the C-L filter has already sent at
1386 * least one bucket on to the next output filter
1389 apr_bucket_brigade *tmpbb;
1392 /* This filter computes the content length, but it also computes the number
1393 * of bytes sent to the client. This means that this filter will always run
1394 * through all of the buckets in all brigades
1396 AP_CORE_DECLARE_NONSTD(apr_status_t) ap_content_length_filter(
1398 apr_bucket_brigade *b)
1400 request_rec *r = f->r;
1401 struct content_length_ctx *ctx;
1404 apr_read_type_e eblock = APR_NONBLOCK_READ;
1408 f->ctx = ctx = apr_palloc(r->pool, sizeof(*ctx));
1410 ctx->tmpbb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
1413 /* Loop through this set of buckets to compute their length
1415 e = APR_BRIGADE_FIRST(b);
1416 while (e != APR_BRIGADE_SENTINEL(b)) {
1417 if (APR_BUCKET_IS_EOS(e)) {
1421 if (e->length == (apr_size_t)-1) {
1423 const char *ignored;
1426 /* This is probably a pipe bucket. Send everything
1427 * prior to this, and then read the data for this bucket.
1429 rv = apr_bucket_read(e, &ignored, &len, eblock);
1430 if (rv == APR_SUCCESS) {
1431 /* Attempt a nonblocking read next time through */
1432 eblock = APR_NONBLOCK_READ;
1433 r->bytes_sent += len;
1435 else if (APR_STATUS_IS_EAGAIN(rv)) {
1436 /* Output everything prior to this bucket, and then
1437 * do a blocking read on the next batch.
1439 if (e != APR_BRIGADE_FIRST(b)) {
1441 apr_brigade_split_ex(b, e, ctx->tmpbb);
1442 flush = apr_bucket_flush_create(r->connection->bucket_alloc);
1444 APR_BRIGADE_INSERT_TAIL(b, flush);
1445 rv = ap_pass_brigade(f->next, b);
1446 if (rv != APR_SUCCESS || f->c->aborted) {
1449 apr_brigade_cleanup(b);
1450 APR_BRIGADE_CONCAT(b, ctx->tmpbb);
1451 e = APR_BRIGADE_FIRST(b);
1455 eblock = APR_BLOCK_READ;
1459 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(00574)
1460 "ap_content_length_filter: "
1461 "apr_bucket_read() failed");
1466 r->bytes_sent += e->length;
1468 e = APR_BUCKET_NEXT(e);
1471 /* If we've now seen the entire response and it's otherwise
1472 * okay to set the C-L in the response header, then do so now.
1474 * We can only set a C-L in the response header if we haven't already
1475 * sent any buckets on to the next output filter for this request.
1477 if (ctx->data_sent == 0 && eos &&
1478 /* don't whack the C-L if it has already been set for a HEAD
1479 * by something like proxy. the brigade only has an EOS bucket
1480 * in this case, making r->bytes_sent zero.
1482 * if r->bytes_sent > 0 we have a (temporary) body whose length may
1483 * have been changed by a filter. the C-L header might not have been
1484 * updated so we do it here. long term it would be cleaner to have
1485 * such filters update or remove the C-L header, and just use it
1488 !(r->header_only && r->bytes_sent == 0 &&
1489 apr_table_get(r->headers_out, "Content-Length"))) {
1490 ap_set_content_length(r, r->bytes_sent);
1494 return ap_pass_brigade(f->next, b);
1498 * Send the body of a response to the client.
1500 AP_DECLARE(apr_status_t) ap_send_fd(apr_file_t *fd, request_rec *r,
1501 apr_off_t offset, apr_size_t len,
1504 conn_rec *c = r->connection;
1505 apr_bucket_brigade *bb = NULL;
1508 bb = apr_brigade_create(r->pool, c->bucket_alloc);
1510 apr_brigade_insert_file(bb, fd, offset, len, r->pool);
1512 rv = ap_pass_brigade(r->output_filters, bb);
1513 if (rv != APR_SUCCESS) {
1514 *nbytes = 0; /* no way to tell how many were actually sent */
1524 /* send data from an in-memory buffer */
1525 AP_DECLARE(apr_size_t) ap_send_mmap(apr_mmap_t *mm,
1530 conn_rec *c = r->connection;
1531 apr_bucket_brigade *bb = NULL;
1534 bb = apr_brigade_create(r->pool, c->bucket_alloc);
1535 b = apr_bucket_mmap_create(mm, offset, length, c->bucket_alloc);
1536 APR_BRIGADE_INSERT_TAIL(bb, b);
1537 ap_pass_brigade(r->output_filters, bb);
1539 return mm->size; /* XXX - change API to report apr_status_t? */
1541 #endif /* APR_HAS_MMAP */
1544 apr_bucket_brigade *bb;
1545 apr_bucket_brigade *tmpbb;
1546 } old_write_filter_ctx;
1548 AP_CORE_DECLARE_NONSTD(apr_status_t) ap_old_write_filter(
1549 ap_filter_t *f, apr_bucket_brigade *bb)
1551 old_write_filter_ctx *ctx = f->ctx;
1553 AP_DEBUG_ASSERT(ctx);
1555 if (ctx->bb != NULL) {
1556 /* whatever is coming down the pipe (we don't care), we
1557 * can simply insert our buffered data at the front and
1558 * pass the whole bundle down the chain.
1560 APR_BRIGADE_PREPEND(bb, ctx->bb);
1563 return ap_pass_brigade(f->next, bb);
1566 static ap_filter_t *insert_old_write_filter(request_rec *r)
1569 old_write_filter_ctx *ctx;
1571 /* future optimization: record some flags in the request_rec to
1572 * say whether we've added our filter, and whether it is first.
1575 /* this will typically exit on the first test */
1576 for (f = r->output_filters; f != NULL; f = f->next) {
1577 if (ap_old_write_func == f->frec)
1582 /* our filter hasn't been added yet */
1583 ctx = apr_pcalloc(r->pool, sizeof(*ctx));
1584 ctx->tmpbb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
1586 ap_add_output_filter("OLD_WRITE", ctx, r, r->connection);
1587 f = r->output_filters;
1593 static apr_status_t buffer_output(request_rec *r,
1594 const char *str, apr_size_t len)
1596 conn_rec *c = r->connection;
1598 old_write_filter_ctx *ctx;
1603 f = insert_old_write_filter(r);
1606 /* if the first filter is not our buffering filter, then we have to
1607 * deliver the content through the normal filter chain
1609 if (f != r->output_filters) {
1611 apr_bucket *b = apr_bucket_transient_create(str, len, c->bucket_alloc);
1612 APR_BRIGADE_INSERT_TAIL(ctx->tmpbb, b);
1614 rv = ap_pass_brigade(r->output_filters, ctx->tmpbb);
1615 apr_brigade_cleanup(ctx->tmpbb);
1619 if (ctx->bb == NULL) {
1620 ctx->bb = apr_brigade_create(r->pool, c->bucket_alloc);
1623 return ap_fwrite(f->next, ctx->bb, str, len);
1626 AP_DECLARE(int) ap_rputc(int c, request_rec *r)
1630 if (r->connection->aborted) {
1634 if (buffer_output(r, &c2, 1) != APR_SUCCESS)
1640 AP_DECLARE(int) ap_rwrite(const void *buf, int nbyte, request_rec *r)
1642 if (r->connection->aborted)
1645 if (buffer_output(r, buf, nbyte) != APR_SUCCESS)
1651 struct ap_vrprintf_data {
1652 apr_vformatter_buff_t vbuff;
1657 static apr_status_t r_flush(apr_vformatter_buff_t *buff)
1659 /* callback function passed to ap_vformatter to be called when
1660 * vformatter needs to write into buff and buff.curpos > buff.endpos */
1662 /* ap_vrprintf_data passed as a apr_vformatter_buff_t, which is then
1663 * "downcast" to an ap_vrprintf_data */
1664 struct ap_vrprintf_data *vd = (struct ap_vrprintf_data*)buff;
1666 if (vd->r->connection->aborted)
1669 /* r_flush is called when vbuff is completely full */
1670 if (buffer_output(vd->r, vd->buff, AP_IOBUFSIZE)) {
1674 /* reset the buffer position */
1675 vd->vbuff.curpos = vd->buff;
1676 vd->vbuff.endpos = vd->buff + AP_IOBUFSIZE;
1681 AP_DECLARE(int) ap_vrprintf(request_rec *r, const char *fmt, va_list va)
1684 struct ap_vrprintf_data vd;
1685 char vrprintf_buf[AP_IOBUFSIZE];
1687 vd.vbuff.curpos = vrprintf_buf;
1688 vd.vbuff.endpos = vrprintf_buf + AP_IOBUFSIZE;
1690 vd.buff = vrprintf_buf;
1692 if (r->connection->aborted)
1695 written = apr_vformatter(r_flush, &vd.vbuff, fmt, va);
1697 if (written != -1) {
1698 int n = vd.vbuff.curpos - vrprintf_buf;
1700 /* last call to buffer_output, to finish clearing the buffer */
1701 if (buffer_output(r, vrprintf_buf,n) != APR_SUCCESS)
1710 AP_DECLARE_NONSTD(int) ap_rprintf(request_rec *r, const char *fmt, ...)
1715 if (r->connection->aborted)
1719 n = ap_vrprintf(r, fmt, va);
1725 AP_DECLARE_NONSTD(int) ap_rvputs(request_rec *r, ...)
1730 apr_size_t written = 0;
1732 if (r->connection->aborted)
1735 /* ### TODO: if the total output is large, put all the strings
1736 * ### into a single brigade, rather than flushing each time we
1737 * ### fill the buffer
1741 s = va_arg(va, const char *);
1746 if (buffer_output(r, s, len) != APR_SUCCESS) {
1757 AP_DECLARE(int) ap_rflush(request_rec *r)
1759 conn_rec *c = r->connection;
1762 old_write_filter_ctx *ctx;
1765 f = insert_old_write_filter(r);
1768 b = apr_bucket_flush_create(c->bucket_alloc);
1769 APR_BRIGADE_INSERT_TAIL(ctx->tmpbb, b);
1771 rv = ap_pass_brigade(r->output_filters, ctx->tmpbb);
1772 apr_brigade_cleanup(ctx->tmpbb);
1773 if (rv != APR_SUCCESS)
1780 * This function sets the Last-Modified output header field to the value
1781 * of the mtime field in the request structure - rationalized to keep it from
1782 * being in the future.
1784 AP_DECLARE(void) ap_set_last_modified(request_rec *r)
1786 if (!r->assbackwards) {
1787 apr_time_t mod_time = ap_rationalize_mtime(r, r->mtime);
1788 char *datestr = apr_palloc(r->pool, APR_RFC822_DATE_LEN);
1790 apr_rfc822_date(datestr, mod_time);
1791 apr_table_setn(r->headers_out, "Last-Modified", datestr);
1795 typedef struct hdr_ptr {
1797 apr_bucket_brigade *bb;
1799 static int send_header(void *data, const char *key, const char *val)
1801 ap_fputstrs(((hdr_ptr*)data)->f, ((hdr_ptr*)data)->bb,
1802 key, ": ", val, CRLF, NULL);
1805 AP_DECLARE(void) ap_send_interim_response(request_rec *r, int send_headers)
1808 char *status_line = NULL;
1811 if (r->proto_num < 1001) {
1812 /* don't send interim response to HTTP/1.0 Client */
1815 if (!ap_is_HTTP_INFO(r->status)) {
1816 ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(00575)
1817 "Status is %d - not sending interim response", r->status);
1820 if ((r->status == HTTP_CONTINUE) && !r->expecting_100) {
1822 * Don't send 100-Continue when there was no Expect: 100-continue
1823 * in the request headers. For origin servers this is a SHOULD NOT
1824 * for proxies it is a MUST NOT according to RFC 2616 8.2.3
1829 /* if we send an interim response, we're no longer in a state of
1830 * expecting one. Also, this could feasibly be in a subrequest,
1831 * so we need to propagate the fact that we responded.
1833 for (rr = r; rr != NULL; rr = rr->main) {
1834 rr->expecting_100 = 0;
1837 status_line = apr_pstrcat(r->pool, AP_SERVER_PROTOCOL, " ", r->status_line, CRLF, NULL);
1838 ap_xlate_proto_to_ascii(status_line, strlen(status_line));
1840 x.f = r->connection->output_filters;
1841 x.bb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
1843 ap_fputs(x.f, x.bb, status_line);
1845 apr_table_do(send_header, &x, r->headers_out, NULL);
1846 apr_table_clear(r->headers_out);
1848 ap_fputs(x.f, x.bb, CRLF_ASCII);
1849 ap_fflush(x.f, x.bb);
1850 apr_brigade_destroy(x.bb);
1854 AP_IMPLEMENT_HOOK_VOID(pre_read_request,
1855 (request_rec *r, conn_rec *c),
1857 AP_IMPLEMENT_HOOK_RUN_ALL(int,post_read_request,
1858 (request_rec *r), (r), OK, DECLINED)
1859 AP_IMPLEMENT_HOOK_RUN_ALL(int,log_transaction,
1860 (request_rec *r), (r), OK, DECLINED)
1861 AP_IMPLEMENT_HOOK_RUN_FIRST(const char *,http_scheme,
1862 (const request_rec *r), (r), NULL)
1863 AP_IMPLEMENT_HOOK_RUN_FIRST(unsigned short,default_port,
1864 (const request_rec *r), (r), 0)
1865 AP_IMPLEMENT_HOOK_RUN_FIRST(int, note_auth_failure,
1866 (request_rec *r, const char *auth_type),
1867 (r, auth_type), DECLINED)