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"
60 APLOG_USE_MODULE(core);
63 APR_HOOK_LINK(pre_read_request)
64 APR_HOOK_LINK(post_read_request)
65 APR_HOOK_LINK(log_transaction)
66 APR_HOOK_LINK(http_scheme)
67 APR_HOOK_LINK(default_port)
68 APR_HOOK_LINK(note_auth_failure)
71 AP_DECLARE_DATA ap_filter_rec_t *ap_old_write_func = NULL;
74 /* Patterns to match in ap_make_content_type() */
75 static const char *needcset[] = {
80 static const apr_strmatch_pattern **needcset_patterns;
81 static const apr_strmatch_pattern *charset_pattern;
83 AP_DECLARE(void) ap_setup_make_content_type(apr_pool_t *pool)
86 for (i = 0; needcset[i]; i++) {
89 needcset_patterns = (const apr_strmatch_pattern **)
90 apr_palloc(pool, (i + 1) * sizeof(apr_strmatch_pattern *));
91 for (i = 0; needcset[i]; i++) {
92 needcset_patterns[i] = apr_strmatch_precompile(pool, needcset[i], 0);
94 needcset_patterns[i] = NULL;
95 charset_pattern = apr_strmatch_precompile(pool, "charset=", 0);
99 * Builds the content-type that should be sent to the client from the
100 * content-type specified. The following rules are followed:
101 * - if type is NULL or "", return NULL (do not set content-type).
102 * - if charset adding is disabled, stop processing and return type.
103 * - then, if there are no parameters on type, add the default charset
106 AP_DECLARE(const char *)ap_make_content_type(request_rec *r, const char *type)
108 const apr_strmatch_pattern **pcset;
109 core_dir_config *conf =
110 (core_dir_config *)ap_get_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) {
124 ap_get_module_config(r->request_config, &core_module);
125 if (request_conf->suppress_charset) {
129 type_len = strlen(type);
131 if (apr_strmatch(charset_pattern, type, type_len) != NULL) {
132 /* already has parameter, do nothing */
133 /* XXX we don't check the validity */
137 /* see if it makes sense to add the charset. At present,
138 * we only add it if the Content-type is one of needcset[]
140 for (pcset = needcset_patterns; *pcset ; pcset++) {
141 if (apr_strmatch(*pcset, type, type_len) != NULL) {
142 struct iovec concat[3];
143 concat[0].iov_base = (void *)type;
144 concat[0].iov_len = type_len;
145 concat[1].iov_base = (void *)"; charset=";
146 concat[1].iov_len = sizeof("; charset=") - 1;
147 concat[2].iov_base = (void *)(conf->add_default_charset_name);
148 concat[2].iov_len = strlen(conf->add_default_charset_name);
149 type = apr_pstrcatv(r->pool, concat, 3, NULL);
158 AP_DECLARE(void) ap_set_content_length(request_rec *r, apr_off_t clength)
160 r->clength = clength;
161 apr_table_setn(r->headers_out, "Content-Length",
162 apr_off_t_toa(r->pool, clength));
166 * Return the latest rational time from a request/mtime (modification time)
167 * pair. We return the mtime unless it's in the future, in which case we
168 * return the current time. We use the request time as a reference in order
169 * to limit the number of calls to time(). We don't check for futurosity
170 * unless the mtime is at least as new as the reference.
172 AP_DECLARE(apr_time_t) ap_rationalize_mtime(request_rec *r, apr_time_t mtime)
176 /* For all static responses, it's almost certain that the file was
177 * last modified before the beginning of the request. So there's
178 * no reason to call time(NULL) again. But if the response has been
179 * created on demand, then it might be newer than the time the request
180 * started. In this event we really have to call time(NULL) again
181 * so that we can give the clients the most accurate Last-Modified. If we
182 * were given a time in the future, we return the current time - the
183 * Last-Modified can't be in the future.
185 now = (mtime < r->request_time) ? r->request_time : apr_time_now();
186 return (mtime > now) ? now : mtime;
189 /* Min # of bytes to allocate when reading a request line */
190 #define MIN_LINE_ALLOC 80
192 /* Get a line of protocol input, including any continuation lines
193 * caused by MIME folding (or broken clients) if fold != 0, and place it
194 * in the buffer s, of size n bytes, without the ending newline.
196 * If s is NULL, ap_rgetline_core will allocate necessary memory from r->pool.
198 * Returns APR_SUCCESS if there are no problems and sets *read to be
199 * the full length of s.
201 * APR_ENOSPC is returned if there is not enough buffer space.
202 * Other errors may be returned on other errors.
204 * The LF is *not* returned in the buffer. Therefore, a *read of 0
205 * indicates that an empty line was read.
207 * Notes: Because the buffer uses 1 char for NUL, the most we can return is
208 * (n - 1) actual characters.
210 * If no LF is detected on the last line due to a dropped connection
211 * or a full buffer, that's considered an error.
213 AP_DECLARE(apr_status_t) ap_rgetline_core(char **s, apr_size_t n,
214 apr_size_t *read, request_rec *r,
215 int fold, apr_bucket_brigade *bb)
219 apr_size_t bytes_handled = 0, current_alloc = 0;
220 char *pos, *last_char = *s;
221 int do_alloc = (*s == NULL), saw_eos = 0;
224 * Initialize last_char as otherwise a random value will be compared
225 * against APR_ASCII_LF at the end of the loop if bb only contains
226 * zero-length buckets.
232 apr_brigade_cleanup(bb);
233 rv = ap_get_brigade(r->input_filters, bb, AP_MODE_GETLINE,
235 if (rv != APR_SUCCESS) {
239 /* Something horribly wrong happened. Someone didn't block! */
240 if (APR_BRIGADE_EMPTY(bb)) {
244 for (e = APR_BRIGADE_FIRST(bb);
245 e != APR_BRIGADE_SENTINEL(bb);
246 e = APR_BUCKET_NEXT(e))
251 /* If we see an EOS, don't bother doing anything more. */
252 if (APR_BUCKET_IS_EOS(e)) {
257 rv = apr_bucket_read(e, &str, &len, APR_BLOCK_READ);
258 if (rv != APR_SUCCESS) {
263 /* no use attempting a zero-byte alloc (hurts when
264 * using --with-efence --enable-pool-debug) or
265 * doing any of the other logic either
270 /* Would this overrun our buffer? If so, we'll die. */
271 if (n < bytes_handled + len) {
272 *read = bytes_handled;
274 /* ensure this string is NUL terminated */
275 if (bytes_handled > 0) {
276 (*s)[bytes_handled-1] = '\0';
285 /* Do we have to handle the allocation ourselves? */
287 /* We'll assume the common case where one bucket is enough. */
290 if (current_alloc < MIN_LINE_ALLOC) {
291 current_alloc = MIN_LINE_ALLOC;
293 *s = apr_palloc(r->pool, current_alloc);
295 else if (bytes_handled + len > current_alloc) {
296 /* Increase the buffer size */
297 apr_size_t new_size = current_alloc * 2;
300 if (bytes_handled + len > new_size) {
301 new_size = (bytes_handled + len) * 2;
304 new_buffer = apr_palloc(r->pool, new_size);
306 /* Copy what we already had. */
307 memcpy(new_buffer, *s, bytes_handled);
308 current_alloc = new_size;
313 /* Just copy the rest of the data to the end of the old buffer. */
314 pos = *s + bytes_handled;
315 memcpy(pos, str, len);
316 last_char = pos + len - 1;
318 /* We've now processed that new data - update accordingly. */
319 bytes_handled += len;
322 /* If we got a full line of input, stop reading */
323 if (last_char && (*last_char == APR_ASCII_LF)) {
328 /* Now NUL-terminate the string at the end of the line;
329 * if the last-but-one character is a CR, terminate there */
330 if (last_char > *s && last_char[-1] == APR_ASCII_CR) {
334 bytes_handled = last_char - *s;
336 /* If we're folding, we have more work to do.
338 * Note that if an EOS was seen, we know we can't have another line.
340 if (fold && bytes_handled && !saw_eos) {
346 /* Clear the temp brigade for this filter read. */
347 apr_brigade_cleanup(bb);
349 /* We only care about the first byte. */
350 rv = ap_get_brigade(r->input_filters, bb, AP_MODE_SPECULATIVE,
352 if (rv != APR_SUCCESS) {
356 if (APR_BRIGADE_EMPTY(bb)) {
360 e = APR_BRIGADE_FIRST(bb);
362 /* If we see an EOS, don't bother doing anything more. */
363 if (APR_BUCKET_IS_EOS(e)) {
367 rv = apr_bucket_read(e, &str, &len, APR_BLOCK_READ);
368 if (rv != APR_SUCCESS) {
369 apr_brigade_cleanup(bb);
373 /* Found one, so call ourselves again to get the next line.
375 * FIXME: If the folding line is completely blank, should we
376 * stop folding? Does that require also looking at the next
379 /* When we call destroy, the buckets are deleted, so save that
380 * one character we need. This simplifies our execution paths
381 * at the cost of one character read.
384 if (c == APR_ASCII_BLANK || c == APR_ASCII_TAB) {
385 /* Do we have enough space? We may be full now. */
386 if (bytes_handled >= n) {
388 /* ensure this string is terminated */
393 apr_size_t next_size, next_len;
396 /* If we're doing the allocations for them, we have to
397 * give ourselves a NULL and copy it on return.
402 /* We're null terminated. */
406 next_size = n - bytes_handled;
408 rv = ap_rgetline_core(&tmp, next_size,
409 &next_len, r, 0, bb);
410 if (rv != APR_SUCCESS) {
414 if (do_alloc && next_len > 0) {
416 apr_size_t new_size = bytes_handled + next_len + 1;
418 /* we need to alloc an extra byte for a null */
419 new_buffer = apr_palloc(r->pool, new_size);
421 /* Copy what we already had. */
422 memcpy(new_buffer, *s, bytes_handled);
424 /* copy the new line, including the trailing null */
425 memcpy(new_buffer + bytes_handled, tmp, next_len + 1);
429 last_char += next_len;
430 bytes_handled += next_len;
433 else { /* next character is not tab or space */
438 *read = bytes_handled;
440 /* PR#43039: We shouldn't accept NULL bytes within the line */
441 if (strlen(*s) < bytes_handled) {
448 #if APR_CHARSET_EBCDIC
449 AP_DECLARE(apr_status_t) ap_rgetline(char **s, apr_size_t n,
450 apr_size_t *read, request_rec *r,
451 int fold, apr_bucket_brigade *bb)
453 /* on ASCII boxes, ap_rgetline is a macro which simply invokes
454 * ap_rgetline_core with the same parms
456 * on EBCDIC boxes, each complete http protocol input line needs to be
457 * translated into the code page used by the compiler. Since
458 * ap_rgetline_core uses recursion, we do the translation in a wrapper
459 * function to insure that each input character gets translated only once.
463 rv = ap_rgetline_core(s, n, read, r, fold, bb);
464 if (rv == APR_SUCCESS) {
465 ap_xlate_proto_from_ascii(*s, *read);
471 AP_DECLARE(int) ap_getline(char *s, int n, request_rec *r, int fold)
476 apr_bucket_brigade *tmp_bb;
478 tmp_bb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
479 rv = ap_rgetline(&tmp_s, n, &len, r, fold, tmp_bb);
480 apr_brigade_destroy(tmp_bb);
482 /* Map the out-of-space condition to the old API. */
483 if (rv == APR_ENOSPC) {
487 /* Anything else is just bad. */
488 if (rv != APR_SUCCESS) {
495 /* parse_uri: break apart the uri
497 * - sets r->args to rest after '?' (or NULL if no '?')
498 * - sets r->uri to request uri (without r->args part)
499 * - sets r->hostname (if not set already) from request (scheme://host:port)
501 AP_CORE_DECLARE(void) ap_parse_uri(request_rec *r, const char *uri)
503 int status = HTTP_OK;
505 r->unparsed_uri = apr_pstrdup(r->pool, uri);
507 /* http://issues.apache.org/bugzilla/show_bug.cgi?id=31875
508 * http://issues.apache.org/bugzilla/show_bug.cgi?id=28450
510 * This is not in fact a URI, it's a path. That matters in the
511 * case of a leading double-slash. We need to resolve the issue
512 * by normalising that out before treating it as a URI.
514 while ((uri[0] == '/') && (uri[1] == '/')) {
517 if (r->method_number == M_CONNECT) {
518 status = apr_uri_parse_hostinfo(r->pool, uri, &r->parsed_uri);
521 /* Simple syntax Errors in URLs are trapped by
522 * parse_uri_components().
524 status = apr_uri_parse(r->pool, uri, &r->parsed_uri);
527 if (status == APR_SUCCESS) {
528 /* if it has a scheme we may need to do absoluteURI vhost stuff */
529 if (r->parsed_uri.scheme
530 && !strcasecmp(r->parsed_uri.scheme, ap_http_scheme(r))) {
531 r->hostname = r->parsed_uri.hostname;
533 else if (r->method_number == M_CONNECT) {
534 r->hostname = r->parsed_uri.hostname;
537 r->args = r->parsed_uri.query;
538 r->uri = r->parsed_uri.path ? r->parsed_uri.path
539 : apr_pstrdup(r->pool, "/");
541 #if defined(OS2) || defined(WIN32)
542 /* Handle path translations for OS/2 and plug security hole.
543 * This will prevent "http://www.wherever.com/..\..\/" from
544 * returning a directory for the root drive.
549 for (x = r->uri; (x = strchr(x, '\\')) != NULL; )
552 #endif /* OS2 || WIN32 */
557 r->status = HTTP_BAD_REQUEST; /* set error status */
558 r->uri = apr_pstrdup(r->pool, uri);
562 static int read_request_line(request_rec *r, apr_bucket_brigade *bb)
569 conn_rec *conn = r->connection;
571 int major = 1, minor = 0; /* Assume HTTP/1.0 if non-"HTTP" protocol */
574 int num_blank_lines = 0;
575 int max_blank_lines = r->server->limit_req_fields;
577 if (max_blank_lines <= 0) {
578 max_blank_lines = DEFAULT_LIMIT_REQUEST_FIELDS;
581 /* Read past empty lines until we get a real request line,
582 * a read error, the connection closes (EOF), or we timeout.
584 * We skip empty lines because browsers have to tack a CRLF on to the end
585 * of POSTs to support old CERN webservers. But note that we may not
586 * have flushed any previous response completely to the client yet.
587 * We delay the flush as long as possible so that we can improve
588 * performance for clients that are pipelining requests. If a request
589 * is pipelined then we won't block during the (implicit) read() below.
590 * If the requests aren't pipelined, then the client is still waiting
591 * for the final buffer flush from us, and we will block in the implicit
592 * read(). B_SAFEREAD ensures that the BUFF layer flushes if it will
593 * have to block during a read.
599 /* insure ap_rgetline allocates memory each time thru the loop
600 * if there are empty lines
602 r->the_request = NULL;
603 rv = ap_rgetline(&(r->the_request), (apr_size_t)(r->server->limit_req_line + 2),
606 if (rv != APR_SUCCESS) {
607 r->request_time = apr_time_now();
609 /* ap_rgetline returns APR_ENOSPC if it fills up the
610 * buffer before finding the end-of-line. This is only going to
611 * happen if it exceeds the configured limit for a request-line.
613 if (APR_STATUS_IS_ENOSPC(rv)) {
614 r->status = HTTP_REQUEST_URI_TOO_LARGE;
615 r->proto_num = HTTP_VERSION(1,0);
616 r->protocol = apr_pstrdup(r->pool, "HTTP/1.0");
618 else if (APR_STATUS_IS_TIMEUP(rv)) {
619 r->status = HTTP_REQUEST_TIME_OUT;
621 else if (APR_STATUS_IS_EINVAL(rv)) {
622 r->status = HTTP_BAD_REQUEST;
626 } while ((len <= 0) && (++num_blank_lines < max_blank_lines));
628 if (APLOGrtrace5(r)) {
629 ap_log_rerror(APLOG_MARK, APLOG_TRACE5, 0, r,
630 "Request received from client: %s",
631 ap_escape_logitem(r->pool, r->the_request));
634 /* we've probably got something to do, ignore graceful restart requests */
636 r->request_time = apr_time_now();
638 r->method = ap_getword_white(r->pool, &ll);
641 /* XXX If we want to keep track of the Method, the protocol module should do
642 * it. That support isn't in the scoreboard yet. Hopefully next week
644 ap_update_connection_status(AP_CHILD_THREAD_FROM_ID(conn->id), "Method",
648 uri = ap_getword_white(r->pool, &ll);
650 /* Provide quick information about the request method as soon as known */
652 r->method_number = ap_method_number_of(r->method);
653 if (r->method_number == M_GET && r->method[0] == 'H') {
657 ap_parse_uri(r, uri);
668 r->protocol = apr_pstrmemdup(r->pool, pro, len);
670 /* XXX ap_update_connection_status(conn->id, "Protocol", r->protocol); */
672 /* Avoid sscanf in the common case */
674 && pro[0] == 'H' && pro[1] == 'T' && pro[2] == 'T' && pro[3] == 'P'
675 && pro[4] == '/' && apr_isdigit(pro[5]) && pro[6] == '.'
676 && apr_isdigit(pro[7])) {
677 r->proto_num = HTTP_VERSION(pro[5] - '0', pro[7] - '0');
679 else if (3 == sscanf(r->protocol, "%4s/%u.%u", http, &major, &minor)
680 && (strcasecmp("http", http) == 0)
681 && (minor < HTTP_VERSION(1, 0)) ) /* don't allow HTTP/0.1000 */
682 r->proto_num = HTTP_VERSION(major, minor);
684 r->proto_num = HTTP_VERSION(1, 0);
689 AP_DECLARE(void) ap_get_mime_headers_core(request_rec *r, apr_bucket_brigade *bb)
691 char *last_field = NULL;
692 apr_size_t last_len = 0;
693 apr_size_t alloc_len = 0;
701 * Read header lines until we get the empty separator line, a read error,
702 * the connection closes (EOF), reach the server limit, or we timeout.
709 rv = ap_rgetline(&field, r->server->limit_req_fieldsize + 2,
712 if (rv != APR_SUCCESS) {
713 if (APR_STATUS_IS_TIMEUP(rv)) {
714 r->status = HTTP_REQUEST_TIME_OUT;
717 r->status = HTTP_BAD_REQUEST;
720 /* ap_rgetline returns APR_ENOSPC if it fills up the buffer before
721 * finding the end-of-line. This is only going to happen if it
722 * exceeds the configured limit for a field size.
724 if (rv == APR_ENOSPC && field) {
725 /* insure ap_escape_html will terminate correctly */
726 field[len - 1] = '\0';
727 apr_table_setn(r->notes, "error-notes",
729 "Size of a request header field "
730 "exceeds server limit.<br />\n"
732 ap_escape_html(r->pool, field),
738 if (last_field != NULL) {
739 if ((len > 0) && ((*field == '\t') || *field == ' ')) {
740 /* This line is a continuation of the preceding line(s),
741 * so append it to the line that we've set aside.
742 * Note: this uses a power-of-two allocator to avoid
743 * doing O(n) allocs and using O(n^2) space for
744 * continuations that span many many lines.
746 apr_size_t fold_len = last_len + len + 1; /* trailing null */
748 if (fold_len >= (apr_size_t)(r->server->limit_req_fieldsize)) {
749 r->status = HTTP_BAD_REQUEST;
750 /* report what we have accumulated so far before the
751 * overflow (last_field) as the field with the problem
753 apr_table_setn(r->notes, "error-notes",
755 "Size of a request header field "
757 "exceeds server limit.<br />\n"
759 ap_escape_html(r->pool, last_field),
764 if (fold_len > alloc_len) {
766 alloc_len += alloc_len;
767 if (fold_len > alloc_len) {
768 alloc_len = fold_len;
770 fold_buf = (char *)apr_palloc(r->pool, alloc_len);
771 memcpy(fold_buf, last_field, last_len);
772 last_field = fold_buf;
774 memcpy(last_field + last_len, field, len +1); /* +1 for nul */
778 else /* not a continuation line */ {
780 if (r->server->limit_req_fields
781 && (++fields_read > r->server->limit_req_fields)) {
782 r->status = HTTP_BAD_REQUEST;
783 apr_table_setn(r->notes, "error-notes",
784 "The number of request header fields "
785 "exceeds this server's limit.");
789 if (!(value = strchr(last_field, ':'))) { /* Find ':' or */
790 r->status = HTTP_BAD_REQUEST; /* abort bad request */
791 apr_table_setn(r->notes, "error-notes",
793 "Request header field is "
794 "missing ':' separator.<br />\n"
796 ap_escape_html(r->pool,
802 tmp_field = value - 1; /* last character of field-name */
804 *value++ = '\0'; /* NUL-terminate at colon */
806 while (*value == ' ' || *value == '\t') {
807 ++value; /* Skip to start of value */
810 /* Strip LWS after field-name: */
811 while (tmp_field > last_field
812 && (*tmp_field == ' ' || *tmp_field == '\t')) {
816 /* Strip LWS after field-value: */
817 tmp_field = last_field + last_len - 1;
818 while (tmp_field > value
819 && (*tmp_field == ' ' || *tmp_field == '\t')) {
823 apr_table_addn(r->headers_in, last_field, value);
825 /* reset the alloc_len so that we'll allocate a new
826 * buffer if we have to do any more folding: we can't
827 * use the previous buffer because its contents are
828 * now part of r->headers_in
832 } /* end if current line is not a continuation starting with tab */
835 /* Found a blank line, stop. */
840 /* Keep track of this line so that we can parse it on
841 * the next loop iteration. (In the folded case, last_field
842 * has been updated already.)
850 /* Combine multiple message-header fields with the same
851 * field-name, following RFC 2616, 4.2.
853 apr_table_compress(r->headers_in, APR_OVERLAP_TABLES_MERGE);
856 AP_DECLARE(void) ap_get_mime_headers(request_rec *r)
858 apr_bucket_brigade *tmp_bb;
859 tmp_bb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
860 ap_get_mime_headers_core(r, tmp_bb);
861 apr_brigade_destroy(tmp_bb);
864 request_rec *ap_read_request(conn_rec *conn)
870 apr_bucket_brigade *tmp_bb;
872 apr_interval_time_t cur_timeout;
875 apr_pool_create(&p, conn->pool);
876 apr_pool_tag(p, "request");
877 r = apr_pcalloc(p, sizeof(request_rec));
878 AP_READ_REQUEST_ENTRY((intptr_t)r, (uintptr_t)conn);
880 r->connection = conn;
881 r->server = conn->base_server;
884 r->ap_auth_type = NULL;
886 r->allowed_methods = ap_make_method_list(p, 2);
888 r->headers_in = apr_table_make(r->pool, 25);
889 r->subprocess_env = apr_table_make(r->pool, 25);
890 r->headers_out = apr_table_make(r->pool, 12);
891 r->err_headers_out = apr_table_make(r->pool, 5);
892 r->notes = apr_table_make(r->pool, 5);
894 r->request_config = ap_create_request_config(r->pool);
895 /* Must be set before we run create request hook */
897 r->proto_output_filters = conn->output_filters;
898 r->output_filters = r->proto_output_filters;
899 r->proto_input_filters = conn->input_filters;
900 r->input_filters = r->proto_input_filters;
901 ap_run_create_request(r);
902 r->per_dir_config = r->server->lookup_defaults;
904 r->sent_bodyct = 0; /* bytect isn't for body */
907 r->read_body = REQUEST_NO_BODY;
909 r->status = HTTP_OK; /* Until further notice */
910 r->the_request = NULL;
912 /* Begin by presuming any module can make its own path_info assumptions,
913 * until some module interjects and changes the value.
915 r->used_path_info = AP_REQ_DEFAULT_PATH_INFO;
917 tmp_bb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
919 ap_run_pre_read_request(r, conn);
921 /* Get the request... */
922 if (!read_request_line(r, tmp_bb)) {
923 if (r->status == HTTP_REQUEST_URI_TOO_LARGE
924 || r->status == HTTP_BAD_REQUEST) {
925 if (r->status == HTTP_BAD_REQUEST) {
926 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
927 "request failed: invalid characters in URI");
930 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
931 "request failed: URI too long (longer than %d)", r->server->limit_req_line);
933 ap_send_error_response(r, 0);
934 ap_update_child_status(conn->sbh, SERVER_BUSY_LOG, r);
935 ap_run_log_transaction(r);
936 apr_brigade_destroy(tmp_bb);
939 else if (r->status == HTTP_REQUEST_TIME_OUT) {
940 ap_update_child_status(conn->sbh, SERVER_BUSY_LOG, r);
941 if (!r->connection->keepalives) {
942 ap_run_log_transaction(r);
944 apr_brigade_destroy(tmp_bb);
948 apr_brigade_destroy(tmp_bb);
953 /* We may have been in keep_alive_timeout mode, so toggle back
954 * to the normal timeout mode as we fetch the header lines,
957 csd = ap_get_module_config(conn->conn_config, &core_module);
958 apr_socket_timeout_get(csd, &cur_timeout);
959 if (cur_timeout != conn->base_server->timeout) {
960 apr_socket_timeout_set(csd, conn->base_server->timeout);
961 cur_timeout = conn->base_server->timeout;
964 if (!r->assbackwards) {
965 ap_get_mime_headers_core(r, tmp_bb);
966 if (r->status != HTTP_OK) {
967 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
968 "request failed: error reading the headers");
969 ap_send_error_response(r, 0);
970 ap_update_child_status(conn->sbh, SERVER_BUSY_LOG, r);
971 ap_run_log_transaction(r);
972 apr_brigade_destroy(tmp_bb);
976 if (apr_table_get(r->headers_in, "Transfer-Encoding")
977 && apr_table_get(r->headers_in, "Content-Length")) {
978 /* 2616 section 4.4, point 3: "if both Transfer-Encoding
979 * and Content-Length are received, the latter MUST be
980 * ignored"; so unset it here to prevent any confusion
982 apr_table_unset(r->headers_in, "Content-Length");
986 if (r->header_only) {
988 * Client asked for headers only with HTTP/0.9, which doesn't send
989 * headers! Have to dink things just to make sure the error message
992 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
993 "client sent invalid HTTP/0.9 request: HEAD %s",
996 r->status = HTTP_BAD_REQUEST;
997 ap_send_error_response(r, 0);
998 ap_update_child_status(conn->sbh, SERVER_BUSY_LOG, r);
999 ap_run_log_transaction(r);
1000 apr_brigade_destroy(tmp_bb);
1005 apr_brigade_destroy(tmp_bb);
1007 /* update what we think the virtual host is based on the headers we've
1008 * now read. may update status.
1010 ap_update_vhost_from_headers(r);
1012 /* Toggle to the Host:-based vhost's timeout mode to fetch the
1013 * request body and send the response body, if needed.
1015 if (cur_timeout != r->server->timeout) {
1016 apr_socket_timeout_set(csd, r->server->timeout);
1017 cur_timeout = r->server->timeout;
1020 /* we may have switched to another server */
1021 r->per_dir_config = r->server->lookup_defaults;
1023 if ((!r->hostname && (r->proto_num >= HTTP_VERSION(1, 1)))
1024 || ((r->proto_num == HTTP_VERSION(1, 1))
1025 && !apr_table_get(r->headers_in, "Host"))) {
1027 * Client sent us an HTTP/1.1 or later request without telling us the
1028 * hostname, either with a full URL or a Host: header. We therefore
1029 * need to (as per the 1.1 spec) send an error. As a special case,
1030 * HTTP/1.1 mentions twice (S9, S14.23) that a request MUST contain
1031 * a Host: header, and the server MUST respond with 400 if it doesn't.
1033 r->status = HTTP_BAD_REQUEST;
1034 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
1035 "client sent HTTP/1.1 request without hostname "
1036 "(see RFC2616 section 14.23): %s", r->uri);
1040 * Add the HTTP_IN filter here to ensure that ap_discard_request_body
1041 * called by ap_die and by ap_send_error_response works correctly on
1042 * status codes that do not cause the connection to be dropped and
1043 * in situations where the connection should be kept alive.
1046 ap_add_input_filter_handle(ap_http_input_filter_handle,
1047 NULL, r, r->connection);
1049 if (r->status != HTTP_OK) {
1050 ap_send_error_response(r, 0);
1051 ap_update_child_status(conn->sbh, SERVER_BUSY_LOG, r);
1052 ap_run_log_transaction(r);
1056 if ((access_status = ap_run_post_read_request(r))) {
1057 ap_die(access_status, r);
1058 ap_update_child_status(conn->sbh, SERVER_BUSY_LOG, r);
1059 ap_run_log_transaction(r);
1064 if (((expect = apr_table_get(r->headers_in, "Expect")) != NULL)
1065 && (expect[0] != '\0')) {
1067 * The Expect header field was added to HTTP/1.1 after RFC 2068
1068 * as a means to signal when a 100 response is desired and,
1069 * unfortunately, to signal a poor man's mandatory extension that
1070 * the server must understand or return 417 Expectation Failed.
1072 if (strcasecmp(expect, "100-continue") == 0) {
1073 r->expecting_100 = 1;
1076 r->status = HTTP_EXPECTATION_FAILED;
1077 ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
1078 "client sent an unrecognized expectation value of "
1079 "Expect: %s", expect);
1080 ap_send_error_response(r, 0);
1081 ap_update_child_status(conn->sbh, SERVER_BUSY_LOG, r);
1082 ap_run_log_transaction(r);
1087 AP_READ_REQUEST_SUCCESS((uintptr_t)r, (char *)r->method, (char *)r->uri, (char *)r->server->defn_name, r->status);
1090 AP_READ_REQUEST_FAILURE((uintptr_t)r);
1094 /* if a request with a body creates a subrequest, remove original request's
1095 * input headers which pertain to the body which has already been read.
1096 * out-of-line helper function for ap_set_sub_req_protocol.
1099 static void strip_headers_request_body(request_rec *rnew)
1101 apr_table_unset(rnew->headers_in, "Content-Encoding");
1102 apr_table_unset(rnew->headers_in, "Content-Language");
1103 apr_table_unset(rnew->headers_in, "Content-Length");
1104 apr_table_unset(rnew->headers_in, "Content-Location");
1105 apr_table_unset(rnew->headers_in, "Content-MD5");
1106 apr_table_unset(rnew->headers_in, "Content-Range");
1107 apr_table_unset(rnew->headers_in, "Content-Type");
1108 apr_table_unset(rnew->headers_in, "Expires");
1109 apr_table_unset(rnew->headers_in, "Last-Modified");
1110 apr_table_unset(rnew->headers_in, "Transfer-Encoding");
1114 * A couple of other functions which initialize some of the fields of
1115 * a request structure, as appropriate for adjuncts of one kind or another
1116 * to a request in progress. Best here, rather than elsewhere, since
1117 * *someone* has to set the protocol-specific fields...
1120 AP_DECLARE(void) ap_set_sub_req_protocol(request_rec *rnew,
1121 const request_rec *r)
1123 rnew->the_request = r->the_request; /* Keep original request-line */
1125 rnew->assbackwards = 1; /* Don't send headers from this. */
1126 rnew->no_local_copy = 1; /* Don't try to send HTTP_NOT_MODIFIED for a
1128 rnew->method = "GET";
1129 rnew->method_number = M_GET;
1130 rnew->protocol = "INCLUDED";
1132 rnew->status = HTTP_OK;
1134 rnew->headers_in = apr_table_copy(rnew->pool, r->headers_in);
1136 /* did the original request have a body? (e.g. POST w/SSI tags)
1137 * if so, make sure the subrequest doesn't inherit body headers
1139 if (!r->kept_body && (apr_table_get(r->headers_in, "Content-Length")
1140 || apr_table_get(r->headers_in, "Transfer-Encoding"))) {
1141 strip_headers_request_body(rnew);
1143 rnew->subprocess_env = apr_table_copy(rnew->pool, r->subprocess_env);
1144 rnew->headers_out = apr_table_make(rnew->pool, 5);
1145 rnew->err_headers_out = apr_table_make(rnew->pool, 5);
1146 rnew->notes = apr_table_make(rnew->pool, 5);
1148 rnew->expecting_100 = r->expecting_100;
1149 rnew->read_length = r->read_length;
1150 rnew->read_body = REQUEST_NO_BODY;
1152 rnew->main = (request_rec *) r;
1155 static void end_output_stream(request_rec *r)
1157 conn_rec *c = r->connection;
1158 apr_bucket_brigade *bb;
1161 bb = apr_brigade_create(r->pool, c->bucket_alloc);
1162 b = apr_bucket_eos_create(c->bucket_alloc);
1163 APR_BRIGADE_INSERT_TAIL(bb, b);
1164 ap_pass_brigade(r->output_filters, bb);
1167 AP_DECLARE(void) ap_finalize_sub_req_protocol(request_rec *sub)
1169 /* tell the filter chain there is no more content coming */
1170 if (!sub->eos_sent) {
1171 end_output_stream(sub);
1175 /* finalize_request_protocol is called at completion of sending the
1176 * response. Its sole purpose is to send the terminating protocol
1177 * information for any wrappers around the response message body
1178 * (i.e., transfer encodings). It should have been named finalize_response.
1180 AP_DECLARE(void) ap_finalize_request_protocol(request_rec *r)
1182 (void) ap_discard_request_body(r);
1184 /* tell the filter chain there is no more content coming */
1186 end_output_stream(r);
1191 * Support for the Basic authentication protocol, and a bit for Digest.
1193 AP_DECLARE(void) ap_note_auth_failure(request_rec *r)
1195 const char *type = ap_auth_type(r);
1197 ap_run_note_auth_failure(r, type);
1200 ap_log_rerror(APLOG_MARK, APLOG_ERR,
1201 0, r, "need AuthType to note auth failure: %s", r->uri);
1205 AP_DECLARE(void) ap_note_basic_auth_failure(request_rec *r)
1207 ap_note_auth_failure(r);
1210 AP_DECLARE(void) ap_note_digest_auth_failure(request_rec *r)
1212 ap_note_auth_failure(r);
1215 AP_DECLARE(int) ap_get_basic_auth_pw(request_rec *r, const char **pw)
1217 const char *auth_line = apr_table_get(r->headers_in,
1218 (PROXYREQ_PROXY == r->proxyreq)
1219 ? "Proxy-Authorization"
1223 if (!(t = ap_auth_type(r)) || strcasecmp(t, "Basic"))
1226 if (!ap_auth_name(r)) {
1227 ap_log_rerror(APLOG_MARK, APLOG_ERR,
1228 0, r, "need AuthName: %s", r->uri);
1229 return HTTP_INTERNAL_SERVER_ERROR;
1233 ap_note_auth_failure(r);
1234 return HTTP_UNAUTHORIZED;
1237 if (strcasecmp(ap_getword(r->pool, &auth_line, ' '), "Basic")) {
1238 /* Client tried to authenticate using wrong auth scheme */
1239 ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
1240 "client used wrong authentication scheme: %s", r->uri);
1241 ap_note_auth_failure(r);
1242 return HTTP_UNAUTHORIZED;
1245 while (*auth_line == ' ' || *auth_line == '\t') {
1249 t = ap_pbase64decode(r->pool, auth_line);
1250 r->user = ap_getword_nulls (r->pool, &t, ':');
1251 r->ap_auth_type = "Basic";
1258 struct content_length_ctx {
1259 int data_sent; /* true if the C-L filter has already sent at
1260 * least one bucket on to the next output filter
1263 apr_bucket_brigade *tmpbb;
1266 /* This filter computes the content length, but it also computes the number
1267 * of bytes sent to the client. This means that this filter will always run
1268 * through all of the buckets in all brigades
1270 AP_CORE_DECLARE_NONSTD(apr_status_t) ap_content_length_filter(
1272 apr_bucket_brigade *b)
1274 request_rec *r = f->r;
1275 struct content_length_ctx *ctx;
1278 apr_read_type_e eblock = APR_NONBLOCK_READ;
1282 f->ctx = ctx = apr_palloc(r->pool, sizeof(*ctx));
1284 ctx->tmpbb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
1287 /* Loop through this set of buckets to compute their length
1289 e = APR_BRIGADE_FIRST(b);
1290 while (e != APR_BRIGADE_SENTINEL(b)) {
1291 if (APR_BUCKET_IS_EOS(e)) {
1295 if (e->length == (apr_size_t)-1) {
1297 const char *ignored;
1300 /* This is probably a pipe bucket. Send everything
1301 * prior to this, and then read the data for this bucket.
1303 rv = apr_bucket_read(e, &ignored, &len, eblock);
1304 if (rv == APR_SUCCESS) {
1305 /* Attempt a nonblocking read next time through */
1306 eblock = APR_NONBLOCK_READ;
1307 r->bytes_sent += len;
1309 else if (APR_STATUS_IS_EAGAIN(rv)) {
1310 /* Output everything prior to this bucket, and then
1311 * do a blocking read on the next batch.
1313 if (e != APR_BRIGADE_FIRST(b)) {
1315 apr_brigade_split_ex(b, e, ctx->tmpbb);
1316 flush = apr_bucket_flush_create(r->connection->bucket_alloc);
1318 APR_BRIGADE_INSERT_TAIL(b, flush);
1319 rv = ap_pass_brigade(f->next, b);
1320 if (rv != APR_SUCCESS || f->c->aborted) {
1323 apr_brigade_cleanup(b);
1324 APR_BRIGADE_CONCAT(b, ctx->tmpbb);
1325 e = APR_BRIGADE_FIRST(b);
1329 eblock = APR_BLOCK_READ;
1333 ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
1334 "ap_content_length_filter: "
1335 "apr_bucket_read() failed");
1340 r->bytes_sent += e->length;
1342 e = APR_BUCKET_NEXT(e);
1345 /* If we've now seen the entire response and it's otherwise
1346 * okay to set the C-L in the response header, then do so now.
1348 * We can only set a C-L in the response header if we haven't already
1349 * sent any buckets on to the next output filter for this request.
1351 if (ctx->data_sent == 0 && eos &&
1352 /* don't whack the C-L if it has already been set for a HEAD
1353 * by something like proxy. the brigade only has an EOS bucket
1354 * in this case, making r->bytes_sent zero.
1356 * if r->bytes_sent > 0 we have a (temporary) body whose length may
1357 * have been changed by a filter. the C-L header might not have been
1358 * updated so we do it here. long term it would be cleaner to have
1359 * such filters update or remove the C-L header, and just use it
1362 !(r->header_only && r->bytes_sent == 0 &&
1363 apr_table_get(r->headers_out, "Content-Length"))) {
1364 ap_set_content_length(r, r->bytes_sent);
1368 return ap_pass_brigade(f->next, b);
1372 * Send the body of a response to the client.
1374 AP_DECLARE(apr_status_t) ap_send_fd(apr_file_t *fd, request_rec *r,
1375 apr_off_t offset, apr_size_t len,
1378 conn_rec *c = r->connection;
1379 apr_bucket_brigade *bb = NULL;
1382 bb = apr_brigade_create(r->pool, c->bucket_alloc);
1384 apr_brigade_insert_file(bb, fd, 0, len, r->pool);
1386 rv = ap_pass_brigade(r->output_filters, bb);
1387 if (rv != APR_SUCCESS) {
1388 *nbytes = 0; /* no way to tell how many were actually sent */
1398 /* send data from an in-memory buffer */
1399 AP_DECLARE(size_t) ap_send_mmap(apr_mmap_t *mm, request_rec *r, size_t offset,
1402 conn_rec *c = r->connection;
1403 apr_bucket_brigade *bb = NULL;
1406 bb = apr_brigade_create(r->pool, c->bucket_alloc);
1407 b = apr_bucket_mmap_create(mm, offset, length, c->bucket_alloc);
1408 APR_BRIGADE_INSERT_TAIL(bb, b);
1409 ap_pass_brigade(r->output_filters, bb);
1411 return mm->size; /* XXX - change API to report apr_status_t? */
1413 #endif /* APR_HAS_MMAP */
1416 apr_bucket_brigade *bb;
1417 apr_bucket_brigade *tmpbb;
1418 } old_write_filter_ctx;
1420 AP_CORE_DECLARE_NONSTD(apr_status_t) ap_old_write_filter(
1421 ap_filter_t *f, apr_bucket_brigade *bb)
1423 old_write_filter_ctx *ctx = f->ctx;
1425 AP_DEBUG_ASSERT(ctx);
1427 if (ctx->bb != NULL) {
1428 /* whatever is coming down the pipe (we don't care), we
1429 * can simply insert our buffered data at the front and
1430 * pass the whole bundle down the chain.
1432 APR_BRIGADE_PREPEND(bb, ctx->bb);
1435 return ap_pass_brigade(f->next, bb);
1438 static ap_filter_t *insert_old_write_filter(request_rec *r)
1441 old_write_filter_ctx *ctx;
1443 /* future optimization: record some flags in the request_rec to
1444 * say whether we've added our filter, and whether it is first.
1447 /* this will typically exit on the first test */
1448 for (f = r->output_filters; f != NULL; f = f->next) {
1449 if (ap_old_write_func == f->frec)
1454 /* our filter hasn't been added yet */
1455 ctx = apr_pcalloc(r->pool, sizeof(*ctx));
1456 ctx->tmpbb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
1458 ap_add_output_filter("OLD_WRITE", ctx, r, r->connection);
1459 f = r->output_filters;
1465 static apr_status_t buffer_output(request_rec *r,
1466 const char *str, apr_size_t len)
1468 conn_rec *c = r->connection;
1470 old_write_filter_ctx *ctx;
1475 f = insert_old_write_filter(r);
1478 /* if the first filter is not our buffering filter, then we have to
1479 * deliver the content through the normal filter chain
1481 if (f != r->output_filters) {
1483 apr_bucket *b = apr_bucket_transient_create(str, len, c->bucket_alloc);
1484 APR_BRIGADE_INSERT_TAIL(ctx->tmpbb, b);
1486 rv = ap_pass_brigade(r->output_filters, ctx->tmpbb);
1487 apr_brigade_cleanup(ctx->tmpbb);
1491 if (ctx->bb == NULL) {
1492 ctx->bb = apr_brigade_create(r->pool, c->bucket_alloc);
1495 return ap_fwrite(f->next, ctx->bb, str, len);
1498 AP_DECLARE(int) ap_rputc(int c, request_rec *r)
1502 if (r->connection->aborted) {
1506 if (buffer_output(r, &c2, 1) != APR_SUCCESS)
1512 AP_DECLARE(int) ap_rputs(const char *str, request_rec *r)
1516 if (r->connection->aborted)
1519 if (buffer_output(r, str, len = strlen(str)) != APR_SUCCESS)
1525 AP_DECLARE(int) ap_rwrite(const void *buf, int nbyte, request_rec *r)
1527 if (r->connection->aborted)
1530 if (buffer_output(r, buf, nbyte) != APR_SUCCESS)
1536 struct ap_vrprintf_data {
1537 apr_vformatter_buff_t vbuff;
1542 static apr_status_t r_flush(apr_vformatter_buff_t *buff)
1544 /* callback function passed to ap_vformatter to be called when
1545 * vformatter needs to write into buff and buff.curpos > buff.endpos */
1547 /* ap_vrprintf_data passed as a apr_vformatter_buff_t, which is then
1548 * "downcast" to an ap_vrprintf_data */
1549 struct ap_vrprintf_data *vd = (struct ap_vrprintf_data*)buff;
1551 if (vd->r->connection->aborted)
1554 /* r_flush is called when vbuff is completely full */
1555 if (buffer_output(vd->r, vd->buff, AP_IOBUFSIZE)) {
1559 /* reset the buffer position */
1560 vd->vbuff.curpos = vd->buff;
1561 vd->vbuff.endpos = vd->buff + AP_IOBUFSIZE;
1566 AP_DECLARE(int) ap_vrprintf(request_rec *r, const char *fmt, va_list va)
1569 struct ap_vrprintf_data vd;
1570 char vrprintf_buf[AP_IOBUFSIZE];
1572 vd.vbuff.curpos = vrprintf_buf;
1573 vd.vbuff.endpos = vrprintf_buf + AP_IOBUFSIZE;
1575 vd.buff = vrprintf_buf;
1577 if (r->connection->aborted)
1580 written = apr_vformatter(r_flush, &vd.vbuff, fmt, va);
1582 if (written != -1) {
1583 int n = vd.vbuff.curpos - vrprintf_buf;
1585 /* last call to buffer_output, to finish clearing the buffer */
1586 if (buffer_output(r, vrprintf_buf,n) != APR_SUCCESS)
1595 AP_DECLARE_NONSTD(int) ap_rprintf(request_rec *r, const char *fmt, ...)
1600 if (r->connection->aborted)
1604 n = ap_vrprintf(r, fmt, va);
1610 AP_DECLARE_NONSTD(int) ap_rvputs(request_rec *r, ...)
1615 apr_size_t written = 0;
1617 if (r->connection->aborted)
1620 /* ### TODO: if the total output is large, put all the strings
1621 * ### into a single brigade, rather than flushing each time we
1622 * ### fill the buffer
1626 s = va_arg(va, const char *);
1631 if (buffer_output(r, s, len) != APR_SUCCESS) {
1642 AP_DECLARE(int) ap_rflush(request_rec *r)
1644 conn_rec *c = r->connection;
1647 old_write_filter_ctx *ctx;
1650 f = insert_old_write_filter(r);
1653 b = apr_bucket_flush_create(c->bucket_alloc);
1654 APR_BRIGADE_INSERT_TAIL(ctx->tmpbb, b);
1656 rv = ap_pass_brigade(r->output_filters, ctx->tmpbb);
1657 apr_brigade_cleanup(ctx->tmpbb);
1658 if (rv != APR_SUCCESS)
1665 * This function sets the Last-Modified output header field to the value
1666 * of the mtime field in the request structure - rationalized to keep it from
1667 * being in the future.
1669 AP_DECLARE(void) ap_set_last_modified(request_rec *r)
1671 if (!r->assbackwards) {
1672 apr_time_t mod_time = ap_rationalize_mtime(r, r->mtime);
1673 char *datestr = apr_palloc(r->pool, APR_RFC822_DATE_LEN);
1675 apr_rfc822_date(datestr, mod_time);
1676 apr_table_setn(r->headers_out, "Last-Modified", datestr);
1680 typedef struct hdr_ptr {
1682 apr_bucket_brigade *bb;
1684 static int send_header(void *data, const char *key, const char *val)
1686 ap_fputstrs(((hdr_ptr*)data)->f, ((hdr_ptr*)data)->bb,
1687 key, ": ", val, CRLF, NULL);
1690 AP_DECLARE(void) ap_send_interim_response(request_rec *r, int send_headers)
1693 char *status_line = NULL;
1696 if (r->proto_num < 1001) {
1697 /* don't send interim response to HTTP/1.0 Client */
1700 if (!ap_is_HTTP_INFO(r->status)) {
1701 ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
1702 "Status is %d - not sending interim response", r->status);
1705 if ((r->status == HTTP_CONTINUE) && !r->expecting_100) {
1707 * Don't send 100-Continue when there was no Expect: 100-continue
1708 * in the request headers. For origin servers this is a SHOULD NOT
1709 * for proxies it is a MUST NOT according to RFC 2616 8.2.3
1714 /* if we send an interim response, we're no longer in a state of
1715 * expecting one. Also, this could feasibly be in a subrequest,
1716 * so we need to propagate the fact that we responded.
1718 for (rr = r; rr != NULL; rr = rr->main) {
1719 rr->expecting_100 = 0;
1722 status_line = apr_pstrcat(r->pool, AP_SERVER_PROTOCOL, " ", r->status_line, CRLF, NULL);
1723 ap_xlate_proto_to_ascii(status_line, strlen(status_line));
1725 x.f = r->connection->output_filters;
1726 x.bb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
1728 ap_fputs(x.f, x.bb, status_line);
1730 apr_table_do(send_header, &x, r->headers_out, NULL);
1731 apr_table_clear(r->headers_out);
1733 ap_fputs(x.f, x.bb, CRLF_ASCII);
1734 ap_fflush(x.f, x.bb);
1735 apr_brigade_destroy(x.bb);
1739 AP_IMPLEMENT_HOOK_VOID(pre_read_request,
1740 (request_rec *r, conn_rec *c),
1742 AP_IMPLEMENT_HOOK_RUN_ALL(int,post_read_request,
1743 (request_rec *r), (r), OK, DECLINED)
1744 AP_IMPLEMENT_HOOK_RUN_ALL(int,log_transaction,
1745 (request_rec *r), (r), OK, DECLINED)
1746 AP_IMPLEMENT_HOOK_RUN_FIRST(const char *,http_scheme,
1747 (const request_rec *r), (r), NULL)
1748 AP_IMPLEMENT_HOOK_RUN_FIRST(unsigned short,default_port,
1749 (const request_rec *r), (r), 0)
1750 AP_IMPLEMENT_HOOK_RUN_FIRST(int, note_auth_failure,
1751 (request_rec *r, const char *auth_type),
1752 (r, auth_type), DECLINED)