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 * @file http_protocol.h
19 * @brief HTTP protocol handling
21 * @defgroup APACHE_CORE_PROTO HTTP Protocol Handling
22 * @ingroup APACHE_CORE
26 #ifndef APACHE_HTTP_PROTOCOL_H
27 #define APACHE_HTTP_PROTOCOL_H
30 #include "apr_portable.h"
32 #include "apr_buckets.h"
33 #include "util_filter.h"
40 * This hook allows modules to insert filters for the current error response
41 * @param r the current request
44 AP_DECLARE_HOOK(void,insert_error_filter,(request_rec *r))
46 /** This is an optimization. We keep a record of the filter_rec that
47 * stores the old_write filter, so that we can avoid strcmp's later.
49 AP_DECLARE_DATA extern ap_filter_rec_t *ap_old_write_func;
52 * Prototypes for routines which either talk directly back to the user,
53 * or control the ones that eventually do.
57 * Read a request and fill in the fields.
58 * @param c The current connection
59 * @return The new request_rec
61 request_rec *ap_read_request(conn_rec *c);
64 * Read the mime-encoded headers.
65 * @param r The current request
67 AP_DECLARE(void) ap_get_mime_headers(request_rec *r);
70 * Optimized version of ap_get_mime_headers() that requires a
71 * temporary brigade to work with
72 * @param r The current request
73 * @param bb temp brigade
75 AP_DECLARE(void) ap_get_mime_headers_core(request_rec *r,
76 apr_bucket_brigade *bb);
78 /* Finish up stuff after a request */
81 * Called at completion of sending the response. It sends the terminating
82 * protocol information.
83 * @param r The current request
85 AP_DECLARE(void) ap_finalize_request_protocol(request_rec *r);
88 * Send error back to client.
89 * @param r The current request
90 * @param recursive_error last arg indicates error status in case we get
91 * an error in the process of trying to deal with an ErrorDocument
92 * to handle some other error. In that case, we print the default
93 * report for the first thing that went wrong, and more briefly report
94 * on the problem with the ErrorDocument.
96 AP_DECLARE(void) ap_send_error_response(request_rec *r, int recursive_error);
98 /* Set last modified header line from the lastmod date of the associated file.
99 * Also, set content length.
101 * May return an error status, typically HTTP_NOT_MODIFIED (that when the
102 * permit_cache argument is set to one).
106 * Set the content length for this request
107 * @param r The current request
108 * @param length The new content length
110 AP_DECLARE(void) ap_set_content_length(request_rec *r, apr_off_t length);
113 * Set the keepalive status for this request
114 * @param r The current request
115 * @return 1 if keepalive can be set, 0 otherwise
117 AP_DECLARE(int) ap_set_keepalive(request_rec *r);
120 * Return the latest rational time from a request/mtime pair. Mtime is
121 * returned unless it's in the future, in which case we return the current time.
122 * @param r The current request
123 * @param mtime The last modified time
124 * @return the latest rational time.
126 AP_DECLARE(apr_time_t) ap_rationalize_mtime(request_rec *r, apr_time_t mtime);
129 * Build the content-type that should be sent to the client from the
130 * content-type specified. The following rules are followed:
131 * - if type is NULL or "", return NULL (do not set content-type).
132 * - if charset adding is disabled, stop processing and return type.
133 * - then, if there are no parameters on type, add the default charset
135 * @param r The current request
136 * @param type The content type
137 * @return The content-type
139 AP_DECLARE(const char *) ap_make_content_type(request_rec *r,
143 * Precompile metadata structures used by ap_make_content_type()
144 * @param pool The pool to use for allocations
146 AP_DECLARE(void) ap_setup_make_content_type(apr_pool_t *pool);
149 * Construct an entity tag from the resource information. If it's a real
150 * file, build in some of the file characteristics.
151 * @param r The current request
152 * @param force_weak Force the entity tag to be weak - it could be modified
153 * again in as short an interval.
154 * @return The entity tag
156 AP_DECLARE(char *) ap_make_etag(request_rec *r, int force_weak);
159 * Set the E-tag outgoing header
160 * @param r The current request
162 AP_DECLARE(void) ap_set_etag(request_rec *r);
165 * Set the last modified time for the file being sent
166 * @param r The current request
168 AP_DECLARE(void) ap_set_last_modified(request_rec *r);
172 AP_CONDITION_NOMATCH,
178 * Tests conditional request rules for the If-Match header.
179 * @param r The current request
180 * @param headers The response headers to check against
181 * @return AP_CONDITION_NONE if the header is missing, AP_CONDITION_NOMATCH
182 * if the header does not match, AP_CONDITION_STRONG for a strong
183 * match. Weak matches are not permitted for the If-Match header.
185 AP_DECLARE(ap_condition_e) ap_condition_if_match(request_rec *r,
186 apr_table_t *headers);
189 * Tests conditional request rules for the If-Unmodified-Since header.
190 * @param r The current request
191 * @param headers The response headers to check against
192 * @return AP_CONDITION_NONE if the header is missing, AP_CONDITION_NOMATCH
193 * if the header does not match, AP_CONDITION_WEAK if a weak match
194 * was present and allowed by RFC2616, AP_CONDITION_STRONG for a
197 AP_DECLARE(ap_condition_e) ap_condition_if_unmodified_since(request_rec *r,
198 apr_table_t *headers);
201 * Tests conditional request rules for the If-None-Match header.
202 * @param r The current request
203 * @param headers The response headers to check against
204 * @return AP_CONDITION_NONE if the header is missing, AP_CONDITION_NOMATCH
205 * if the header does not match, AP_CONDITION_WEAK if a weak match
206 * was present and allowed by RFC2616, AP_CONDITION_STRONG for a
209 AP_DECLARE(ap_condition_e) ap_condition_if_none_match(request_rec *r,
210 apr_table_t *headers);
213 * Tests conditional request rules for the If-Modified-Since header.
214 * @param r The current request
215 * @param headers The response headers to check against
216 * @return AP_CONDITION_NONE if the header is missing, AP_CONDITION_NOMATCH
217 * if the header does not match, AP_CONDITION_WEAK if a weak match
218 * was present and allowed by RFC2616, AP_CONDITION_STRONG for a
221 AP_DECLARE(ap_condition_e) ap_condition_if_modified_since(request_rec *r,
222 apr_table_t *headers);
225 * Tests conditional request rules for the If-Range header.
226 * @param r The current request
227 * @param headers The response headers to check against
228 * @return AP_CONDITION_NONE if either the If-Range or Range header is
229 * missing, AP_CONDITION_NOMATCH if the header does not match,
230 * AP_CONDITION_STRONG for a strong match. Weak matches are not
231 * permitted for the If-Range header.
233 AP_DECLARE(ap_condition_e) ap_condition_if_range(request_rec *r,
234 apr_table_t *headers);
237 * Implements condition GET rules for HTTP/1.1 specification. This function
238 * inspects the client headers and determines if the response fulfills
239 * the requirements specified.
240 * @param r The current request
241 * @return OK if the response fulfills the condition GET rules, some
242 * other status code otherwise
244 AP_DECLARE(int) ap_meets_conditions(request_rec *r);
246 /* Other ways to send stuff at the client. All of these keep track
247 * of bytes_sent automatically. This indirection is intended to make
248 * it a little more painless to slide things like HTTP-NG packetization
249 * underneath the main body of the code later. In the meantime, it lets
250 * us centralize a bit of accounting (bytes_sent).
252 * These also return the number of bytes written by the call.
253 * They should only be called with a timeout registered, for obvious reaasons.
254 * (Ditto the send_header stuff).
258 * Send an entire file to the client, using sendfile if supported by the
260 * @param fd The file to send.
261 * @param r The current request
262 * @param offset Offset into the file to start sending.
263 * @param length Amount of data to send
264 * @param nbytes Amount of data actually sent
266 AP_DECLARE(apr_status_t) ap_send_fd(apr_file_t *fd, request_rec *r, apr_off_t offset,
267 apr_size_t length, apr_size_t *nbytes);
271 * Send an MMAP'ed file to the client
272 * @param mm The MMAP'ed file to send
273 * @param r The current request
274 * @param offset The offset into the MMAP to start sending
275 * @param length The amount of data to send
276 * @return The number of bytes sent
278 AP_DECLARE(apr_size_t) ap_send_mmap(apr_mmap_t *mm,
286 * Register a new request method, and return the offset that will be
287 * associated with that method.
289 * @param p The pool to create registered method numbers from.
290 * @param methname The name of the new method to register.
291 * @return An int value representing an offset into a bitmask.
293 AP_DECLARE(int) ap_method_register(apr_pool_t *p, const char *methname);
296 * Initialize the method_registry and allocate memory for it.
298 * @param p Pool to allocate memory for the registry from.
300 AP_DECLARE(void) ap_method_registry_init(apr_pool_t *p);
303 * This is a convenience macro to ease with checking a mask
304 * against a method name.
306 #define AP_METHOD_CHECK_ALLOWED(mask, methname) \
307 ((mask) & (AP_METHOD_BIT << ap_method_number_of((methname))))
310 * Create a new method list with the specified number of preallocated
311 * slots for extension methods.
313 * @param p Pointer to a pool in which the structure should be
315 * @param nelts Number of preallocated extension slots
316 * @return Pointer to the newly created structure.
318 AP_DECLARE(ap_method_list_t *) ap_make_method_list(apr_pool_t *p, int nelts);
324 * @param dest List to copy to
325 * @param src List to copy from
327 AP_DECLARE(void) ap_copy_method_list(ap_method_list_t *dest,
328 ap_method_list_t *src);
331 * Search for an HTTP method name in an ap_method_list_t structure, and
332 * return true if found.
334 * @param method String containing the name of the method to check.
335 * @param l Pointer to a method list, such as r->allowed_methods.
336 * @return 1 if method is in the list, otherwise 0
338 AP_DECLARE(int) ap_method_in_list(ap_method_list_t *l, const char *method);
341 * Add an HTTP method name to an ap_method_list_t structure if it isn't
344 * @param method String containing the name of the method to check.
345 * @param l Pointer to a method list, such as r->allowed_methods.
348 AP_DECLARE(void) ap_method_list_add(ap_method_list_t *l, const char *method);
351 * Remove an HTTP method name from an ap_method_list_t structure.
353 * @param l Pointer to a method list, such as r->allowed_methods.
354 * @param method String containing the name of the method to remove.
357 AP_DECLARE(void) ap_method_list_remove(ap_method_list_t *l,
361 * Reset a method list to be completely empty.
363 * @param l Pointer to a method list, such as r->allowed_methods.
366 AP_DECLARE(void) ap_clear_method_list(ap_method_list_t *l);
369 * Set the content type for this request (r->content_type).
370 * @param r The current request
371 * @param ct The new content type
372 * @warning This function must be called to set r->content_type in order
373 * for the AddOutputFilterByType directive to work correctly.
375 AP_DECLARE(void) ap_set_content_type(request_rec *r, const char *ct);
378 * Set the Accept-Ranges header for this response
379 * @param r The current request
381 AP_DECLARE(void) ap_set_accept_ranges(request_rec *r);
384 /* Hmmm... could macrofy these for now, and maybe forever, though the
385 * definitions of the macros would get a whole lot hairier.
389 * Output one character for this request
390 * @param c the character to output
391 * @param r the current request
392 * @return The number of bytes sent
394 AP_DECLARE(int) ap_rputc(int c, request_rec *r);
397 * Write a buffer for the current request
398 * @param buf The buffer to write
399 * @param nbyte The number of bytes to send from the buffer
400 * @param r The current request
401 * @return The number of bytes sent
403 AP_DECLARE(int) ap_rwrite(const void *buf, int nbyte, request_rec *r);
406 * Output a string for the current request
407 * @param str The string to output
408 * @param r The current request
409 * @return The number of bytes sent
410 * @note ap_rputs may be implemented as macro or inline function
412 static APR_INLINE int ap_rputs(const char *str, request_rec *r)
414 return ap_rwrite(str, (int)strlen(str), r);
418 * Write an unspecified number of strings to the request
419 * @param r The current request
420 * @param ... The strings to write
421 * @return The number of bytes sent
423 AP_DECLARE_NONSTD(int) ap_rvputs(request_rec *r,...)
427 * Output data to the client in a printf format
428 * @param r The current request
429 * @param fmt The format string
430 * @param vlist The arguments to use to fill out the format string
431 * @return The number of bytes sent
433 AP_DECLARE(int) ap_vrprintf(request_rec *r, const char *fmt, va_list vlist);
436 * Output data to the client in a printf format
437 * @param r The current request
438 * @param fmt The format string
439 * @param ... The arguments to use to fill out the format string
440 * @return The number of bytes sent
442 AP_DECLARE_NONSTD(int) ap_rprintf(request_rec *r, const char *fmt,...)
443 __attribute__((format(printf,2,3)));
446 * Flush all of the data for the current request to the client
447 * @param r The current request
448 * @return 0 on success, -1 if an error occurred
450 AP_DECLARE(int) ap_rflush(request_rec *r);
453 * Index used in custom_responses array for a specific error code
454 * (only use outside protocol.c is in getting them configured).
455 * @param status HTTP status code
456 * @return The index of the response
458 AP_DECLARE(int) ap_index_of_response(int status);
461 * Return the Status-Line for a given status code (excluding the
462 * HTTP-Version field). If an invalid or unknown status code is
463 * passed, "500 Internal Server Error" will be returned.
464 * @param status The HTTP status code
465 * @return The Status-Line
467 AP_DECLARE(const char *) ap_get_status_line(int status);
469 /* Reading a block of data from the client connection (e.g., POST arg) */
472 * Setup the client to allow Apache to read the request body.
473 * @param r The current request
474 * @param read_policy How the server should interpret a chunked
475 * transfer-encoding. One of: <pre>
476 * REQUEST_NO_BODY Send 413 error if message has any body
477 * REQUEST_CHUNKED_ERROR Send 411 error if body without Content-Length
478 * REQUEST_CHUNKED_DECHUNK If chunked, remove the chunks for me.
480 * @return either OK or an error code
482 AP_DECLARE(int) ap_setup_client_block(request_rec *r, int read_policy);
485 * Determine if the client has sent any data. This also sends a
486 * 100 Continue response to HTTP/1.1 clients, so modules should not be called
487 * until the module is ready to read content.
488 * @warning Never call this function more than once.
489 * @param r The current request
490 * @return 0 if there is no message to read, 1 otherwise
492 AP_DECLARE(int) ap_should_client_block(request_rec *r);
495 * Call this in a loop. It will put data into a buffer and return the length
497 * @param r The current request
498 * @param buffer The buffer in which to store the data
499 * @param bufsiz The size of the buffer
500 * @return Number of bytes inserted into the buffer. When done reading, 0
501 * if EOF, or -1 if there was an error
503 AP_DECLARE(long) ap_get_client_block(request_rec *r, char *buffer, apr_size_t bufsiz);
506 * Map specific APR codes returned by the filter stack to HTTP error
507 * codes, or the default status code provided. Use it as follows:
509 * return ap_map_http_request_error(rv, HTTP_BAD_REQUEST);
511 * If the filter has already handled the error, AP_FILTER_ERROR will
512 * be returned, which is cleanly passed through.
514 * These mappings imply that the filter stack is reading from the
515 * downstream client, the proxy will map these codes differently.
516 * @param rv APR status code
517 * @param status Default HTTP code should the APR code not be recognised
518 * @return Mapped HTTP status code
520 AP_DECLARE(int) ap_map_http_request_error(apr_status_t rv, int status);
523 * In HTTP/1.1, any method can have a body. However, most GET handlers
524 * wouldn't know what to do with a request body if they received one.
525 * This helper routine tests for and reads any message body in the request,
526 * simply discarding whatever it receives. We need to do this because
527 * failing to read the request body would cause it to be interpreted
528 * as the next request on a persistent connection.
529 * @param r The current request
530 * @return error status if request is malformed, OK otherwise
532 AP_DECLARE(int) ap_discard_request_body(request_rec *r);
535 * Setup the output headers so that the client knows how to authenticate
536 * itself the next time, if an authentication request failed.
537 * @param r The current request
539 AP_DECLARE(void) ap_note_auth_failure(request_rec *r);
542 * @deprecated @see ap_note_auth_failure
544 AP_DECLARE(void) ap_note_basic_auth_failure(request_rec *r);
547 * @deprecated @see ap_note_auth_failure
549 AP_DECLARE(void) ap_note_digest_auth_failure(request_rec *r);
552 * This hook allows modules to add support for a specific auth type to
553 * ap_note_auth_failure
554 * @param r the current request
555 * @param auth_type the configured auth_type
556 * @return OK, DECLINED
558 AP_DECLARE_HOOK(int, note_auth_failure, (request_rec *r, const char *auth_type))
561 * Get the password from the request headers
562 * @param r The current request
563 * @param pw The password as set in the headers
564 * @return 0 (OK) if it set the 'pw' argument (and assured
565 * a correct value in r->user); otherwise it returns
566 * an error code, either HTTP_INTERNAL_SERVER_ERROR if things are
567 * really confused, HTTP_UNAUTHORIZED if no authentication at all
568 * seemed to be in use, or DECLINED if there was authentication but
569 * it wasn't Basic (in which case, the caller should presumably
572 AP_DECLARE(int) ap_get_basic_auth_pw(request_rec *r, const char **pw);
575 * parse_uri: break apart the uri
576 * @warning Side Effects:
577 * @li sets r->args to rest after '?' (or NULL if no '?')
578 * @li sets r->uri to request uri (without r->args part)
579 * @li sets r->hostname (if not set already) from request (scheme://host:port)
580 * @param r The current request
581 * @param uri The uri to break apart
583 AP_CORE_DECLARE(void) ap_parse_uri(request_rec *r, const char *uri);
586 * Get the next line of input for the request
587 * @param s The buffer into which to read the line
588 * @param n The size of the buffer
589 * @param r The request
590 * @param fold Whether to merge continuation lines
591 * @return The length of the line, if successful
592 * n, if the line is too big to fit in the buffer
593 * -1 for miscellaneous errors
595 AP_DECLARE(int) ap_getline(char *s, int n, request_rec *r, int fold);
598 * Get the next line of input for the request
600 * Note: on ASCII boxes, ap_rgetline is a macro which simply calls
601 * ap_rgetline_core to get the line of input.
603 * on EBCDIC boxes, ap_rgetline is a wrapper function which
604 * translates ASCII protocol lines to the local EBCDIC code page
605 * after getting the line of input.
607 * @param s Pointer to the pointer to the buffer into which the line
608 * should be read; if *s==NULL, a buffer of the necessary size
609 * to hold the data will be allocated from the request pool
610 * @param n The size of the buffer
611 * @param read The length of the line.
612 * @param r The request
613 * @param fold Whether to merge continuation lines
614 * @param bb Working brigade to use when reading buckets
615 * @return APR_SUCCESS, if successful
616 * APR_ENOSPC, if the line is too big to fit in the buffer
617 * Other errors where appropriate
619 #if APR_CHARSET_EBCDIC
620 AP_DECLARE(apr_status_t) ap_rgetline(char **s, apr_size_t n,
622 request_rec *r, int fold,
623 apr_bucket_brigade *bb);
624 #else /* ASCII box */
625 #define ap_rgetline(s, n, read, r, fold, bb) \
626 ap_rgetline_core((s), (n), (read), (r), (fold), (bb))
629 /** @see ap_rgetline */
630 AP_DECLARE(apr_status_t) ap_rgetline_core(char **s, apr_size_t n,
632 request_rec *r, int fold,
633 apr_bucket_brigade *bb);
636 * Get the method number associated with the given string, assumed to
637 * contain an HTTP method. Returns M_INVALID if not recognized.
638 * @param method A string containing a valid HTTP method
639 * @return The method number
641 AP_DECLARE(int) ap_method_number_of(const char *method);
644 * Get the method name associated with the given internal method
645 * number. Returns NULL if not recognized.
646 * @param p A pool to use for temporary allocations.
647 * @param methnum An integer value corresponding to an internal method number
648 * @return The name corresponding to the method number
650 AP_DECLARE(const char *) ap_method_name_of(apr_pool_t *p, int methnum);
655 * pre_read_request --- run right before read_request_line(),
656 * and not run during any subrequests.
659 * This hook allows modules to affect the request or connection immediately before
660 * the request has been read, and before any other phases have been processes.
661 * @param r The current request of the soon-to-be-read request
662 * @param c The connection
665 AP_DECLARE_HOOK(void,pre_read_request,(request_rec *r, conn_rec *c))
668 * post_read_request --- run right after read_request or internal_redirect,
669 * and not run during any subrequests.
672 * This hook allows modules to affect the request immediately after the request
673 * has been read, and before any other phases have been processes. This allows
674 * modules to make decisions based upon the input header fields
675 * @param r The current request
676 * @return OK or DECLINED
678 AP_DECLARE_HOOK(int,post_read_request,(request_rec *r))
681 * This hook allows modules to perform any module-specific logging activities
682 * over and above the normal server things.
683 * @param r The current request
684 * @return OK, DECLINED, or HTTP_...
686 AP_DECLARE_HOOK(int,log_transaction,(request_rec *r))
689 * This hook allows modules to retrieve the http scheme for a request. This
690 * allows Apache modules to easily extend the schemes that Apache understands
691 * @param r The current request
692 * @return The http scheme from the request
694 AP_DECLARE_HOOK(const char *,http_scheme,(const request_rec *r))
697 * Return the default port from the current request
698 * @param r The current request
699 * @return The current port
701 AP_DECLARE_HOOK(apr_port_t,default_port,(const request_rec *r))
703 /** @see ap_bucket_type_error */
704 typedef struct ap_bucket_error ap_bucket_error;
707 * @struct ap_bucket_error
708 * @brief A bucket referring to an HTTP error
710 * This bucket can be passed down the filter stack to indicate that an
711 * HTTP error occurred while running a filter. In order for this bucket
712 * to be used successfully, it MUST be sent as the first bucket in the
713 * first brigade to be sent from a given filter.
715 struct ap_bucket_error {
716 /** Number of buckets using this memory */
717 apr_bucket_refcount refcount;
718 /** The error code */
720 /** The error string */
724 /** @see ap_bucket_type_error */
725 AP_DECLARE_DATA extern const apr_bucket_type_t ap_bucket_type_error;
728 * Determine if a bucket is an error bucket
729 * @param e The bucket to inspect
730 * @return true or false
732 #define AP_BUCKET_IS_ERROR(e) (e->type == &ap_bucket_type_error)
735 * Make the bucket passed in an error bucket
736 * @param b The bucket to make into an error bucket
737 * @param error The HTTP error code to put in the bucket.
738 * @param buf An optional error string to put in the bucket.
739 * @param p A pool to allocate out of.
740 * @return The new bucket, or NULL if allocation failed
742 AP_DECLARE(apr_bucket *) ap_bucket_error_make(apr_bucket *b, int error,
743 const char *buf, apr_pool_t *p);
746 * Create a bucket referring to an HTTP error.
747 * @param error The HTTP error code to put in the bucket.
748 * @param buf An optional error string to put in the bucket.
749 * @param p A pool to allocate the error string out of.
750 * @param list The bucket allocator from which to allocate the bucket
751 * @return The new bucket, or NULL if allocation failed
753 AP_DECLARE(apr_bucket *) ap_bucket_error_create(int error, const char *buf,
755 apr_bucket_alloc_t *list);
757 AP_DECLARE_NONSTD(apr_status_t) ap_byterange_filter(ap_filter_t *f, apr_bucket_brigade *b);
758 AP_DECLARE_NONSTD(apr_status_t) ap_http_header_filter(ap_filter_t *f, apr_bucket_brigade *b);
759 AP_DECLARE_NONSTD(apr_status_t) ap_content_length_filter(ap_filter_t *,
760 apr_bucket_brigade *);
761 AP_DECLARE_NONSTD(apr_status_t) ap_old_write_filter(ap_filter_t *f, apr_bucket_brigade *b);
764 * Sett up the protocol fields for subsidiary requests
765 * @param rnew New Sub Request
766 * @param r current request
768 AP_DECLARE(void) ap_set_sub_req_protocol(request_rec *rnew, const request_rec *r);
771 * A wrapup function to keep the internal accounting straight.
772 * Indicates that there is no more content coming.
773 * @param sub_r Subrequest that is now compete
775 AP_DECLARE(void) ap_finalize_sub_req_protocol(request_rec *sub_r);
778 * Send an interim (HTTP 1xx) response immediately.
779 * @param r The request
780 * @param send_headers Whether to send&clear headers in r->headers_out
782 AP_DECLARE(void) ap_send_interim_response(request_rec *r, int send_headers);
788 #endif /* !APACHE_HTTP_PROTOCOL_H */