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apache/server/protocol.c
Roy T. Fielding de659cbed0 update license header text 
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@420983 13f79535-47bb-0310-9956-ffa450edef68
2006-07-11 20:33:53 +00:00

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/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* http_protocol.c --- routines which directly communicate with the client.
*
* Code originally by Rob McCool; much redone by Robert S. Thau
* and the Apache Software Foundation.
*/
#include "apr.h"
#include "apr_strings.h"
#include "apr_buckets.h"
#include "apr_lib.h"
#include "apr_signal.h"
#include "apr_strmatch.h"
#define APR_WANT_STDIO /* for sscanf */
#define APR_WANT_STRFUNC
#define APR_WANT_MEMFUNC
#include "apr_want.h"
#define CORE_PRIVATE
#include "util_filter.h"
#include "ap_config.h"
#include "httpd.h"
#include "http_config.h"
#include "http_core.h"
#include "http_protocol.h"
#include "http_main.h"
#include "http_request.h"
#include "http_vhost.h"
#include "http_log.h" /* For errors detected in basic auth common
* support code... */
#include "mod_core.h"
#include "util_charset.h"
#include "util_ebcdic.h"
#include "scoreboard.h"
#if APR_HAVE_STDARG_H
#include <stdarg.h>
#endif
#if APR_HAVE_UNISTD_H
#include <unistd.h>
#endif
APR_HOOK_STRUCT(
APR_HOOK_LINK(post_read_request)
APR_HOOK_LINK(log_transaction)
APR_HOOK_LINK(http_scheme)
APR_HOOK_LINK(default_port)
)
AP_DECLARE_DATA ap_filter_rec_t *ap_old_write_func = NULL;
/* Patterns to match in ap_make_content_type() */
static const char *needcset[] = {
"text/plain",
"text/html",
NULL
};
static const apr_strmatch_pattern **needcset_patterns;
static const apr_strmatch_pattern *charset_pattern;
AP_DECLARE(void) ap_setup_make_content_type(apr_pool_t *pool)
{
int i;
for (i = 0; needcset[i]; i++) {
continue;
}
needcset_patterns = (const apr_strmatch_pattern **)
apr_palloc(pool, (i + 1) * sizeof(apr_strmatch_pattern *));
for (i = 0; needcset[i]; i++) {
needcset_patterns[i] = apr_strmatch_precompile(pool, needcset[i], 0);
}
needcset_patterns[i] = NULL;
charset_pattern = apr_strmatch_precompile(pool, "charset=", 0);
}
/*
* Builds the content-type that should be sent to the client from the
* content-type specified. The following rules are followed:
* - if type is NULL, type is set to ap_default_type(r)
* - if charset adding is disabled, stop processing and return type.
* - then, if there are no parameters on type, add the default charset
* - return type
*/
AP_DECLARE(const char *)ap_make_content_type(request_rec *r, const char *type)
{
const apr_strmatch_pattern **pcset;
core_dir_config *conf =
(core_dir_config *)ap_get_module_config(r->per_dir_config,
&core_module);
core_request_config *request_conf;
apr_size_t type_len;
if (!type) {
type = ap_default_type(r);
}
if (conf->add_default_charset != ADD_DEFAULT_CHARSET_ON) {
return type;
}
request_conf =
ap_get_module_config(r->request_config, &core_module);
if (request_conf->suppress_charset) {
return type;
}
type_len = strlen(type);
if (apr_strmatch(charset_pattern, type, type_len) != NULL) {
/* already has parameter, do nothing */
/* XXX we don't check the validity */
;
}
else {
/* see if it makes sense to add the charset. At present,
* we only add it if the Content-type is one of needcset[]
*/
for (pcset = needcset_patterns; *pcset ; pcset++) {
if (apr_strmatch(*pcset, type, type_len) != NULL) {
struct iovec concat[3];
concat[0].iov_base = (void *)type;
concat[0].iov_len = type_len;
concat[1].iov_base = (void *)"; charset=";
concat[1].iov_len = sizeof("; charset=") - 1;
concat[2].iov_base = (void *)(conf->add_default_charset_name);
concat[2].iov_len = strlen(conf->add_default_charset_name);
type = apr_pstrcatv(r->pool, concat, 3, NULL);
break;
}
}
}
return type;
}
AP_DECLARE(void) ap_set_content_length(request_rec *r, apr_off_t clength)
{
r->clength = clength;
apr_table_setn(r->headers_out, "Content-Length",
apr_off_t_toa(r->pool, clength));
}
/*
* Return the latest rational time from a request/mtime (modification time)
* pair. We return the mtime unless it's in the future, in which case we
* return the current time. We use the request time as a reference in order
* to limit the number of calls to time(). We don't check for futurosity
* unless the mtime is at least as new as the reference.
*/
AP_DECLARE(apr_time_t) ap_rationalize_mtime(request_rec *r, apr_time_t mtime)
{
apr_time_t now;
/* For all static responses, it's almost certain that the file was
* last modified before the beginning of the request. So there's
* no reason to call time(NULL) again. But if the response has been
* created on demand, then it might be newer than the time the request
* started. In this event we really have to call time(NULL) again
* so that we can give the clients the most accurate Last-Modified. If we
* were given a time in the future, we return the current time - the
* Last-Modified can't be in the future.
*/
now = (mtime < r->request_time) ? r->request_time : apr_time_now();
return (mtime > now) ? now : mtime;
}
/* Min # of bytes to allocate when reading a request line */
#define MIN_LINE_ALLOC 80
/* Get a line of protocol input, including any continuation lines
* caused by MIME folding (or broken clients) if fold != 0, and place it
* in the buffer s, of size n bytes, without the ending newline.
*
* If s is NULL, ap_rgetline_core will allocate necessary memory from r->pool.
*
* Returns APR_SUCCESS if there are no problems and sets *read to be
* the full length of s.
*
* APR_ENOSPC is returned if there is not enough buffer space.
* Other errors may be returned on other errors.
*
* The LF is *not* returned in the buffer. Therefore, a *read of 0
* indicates that an empty line was read.
*
* Notes: Because the buffer uses 1 char for NUL, the most we can return is
* (n - 1) actual characters.
*
* If no LF is detected on the last line due to a dropped connection
* or a full buffer, that's considered an error.
*/
AP_DECLARE(apr_status_t) ap_rgetline_core(char **s, apr_size_t n,
apr_size_t *read, request_rec *r,
int fold, apr_bucket_brigade *bb)
{
apr_status_t rv;
apr_bucket *e;
apr_size_t bytes_handled = 0, current_alloc = 0;
char *pos, *last_char = *s;
int do_alloc = (*s == NULL), saw_eos = 0;
/*
* Initialize last_char as otherwise a random value will be compared
* against APR_ASCII_LF at the end of the loop if bb only contains
* zero-length buckets.
*/
if (last_char)
*last_char = '\0';
for (;;) {
apr_brigade_cleanup(bb);
rv = ap_get_brigade(r->input_filters, bb, AP_MODE_GETLINE,
APR_BLOCK_READ, 0);
if (rv != APR_SUCCESS) {
return rv;
}
/* Something horribly wrong happened. Someone didn't block! */
if (APR_BRIGADE_EMPTY(bb)) {
return APR_EGENERAL;
}
for (e = APR_BRIGADE_FIRST(bb);
e != APR_BRIGADE_SENTINEL(bb);
e = APR_BUCKET_NEXT(e))
{
const char *str;
apr_size_t len;
/* If we see an EOS, don't bother doing anything more. */
if (APR_BUCKET_IS_EOS(e)) {
saw_eos = 1;
break;
}
rv = apr_bucket_read(e, &str, &len, APR_BLOCK_READ);
if (rv != APR_SUCCESS) {
return rv;
}
if (len == 0) {
/* no use attempting a zero-byte alloc (hurts when
* using --with-efence --enable-pool-debug) or
* doing any of the other logic either
*/
continue;
}
/* Would this overrun our buffer? If so, we'll die. */
if (n < bytes_handled + len) {
*read = bytes_handled;
if (*s) {
/* ensure this string is NUL terminated */
if (bytes_handled > 0) {
(*s)[bytes_handled-1] = '\0';
}
else {
(*s)[0] = '\0';
}
}
return APR_ENOSPC;
}
/* Do we have to handle the allocation ourselves? */
if (do_alloc) {
/* We'll assume the common case where one bucket is enough. */
if (!*s) {
current_alloc = len;
if (current_alloc < MIN_LINE_ALLOC) {
current_alloc = MIN_LINE_ALLOC;
}
*s = apr_palloc(r->pool, current_alloc);
}
else if (bytes_handled + len > current_alloc) {
/* Increase the buffer size */
apr_size_t new_size = current_alloc * 2;
char *new_buffer;
if (bytes_handled + len > new_size) {
new_size = (bytes_handled + len) * 2;
}
new_buffer = apr_palloc(r->pool, new_size);
/* Copy what we already had. */
memcpy(new_buffer, *s, bytes_handled);
current_alloc = new_size;
*s = new_buffer;
}
}
/* Just copy the rest of the data to the end of the old buffer. */
pos = *s + bytes_handled;
memcpy(pos, str, len);
last_char = pos + len - 1;
/* We've now processed that new data - update accordingly. */
bytes_handled += len;
}
/* If we got a full line of input, stop reading */
if (last_char && (*last_char == APR_ASCII_LF)) {
break;
}
}
/* Now NUL-terminate the string at the end of the line;
* if the last-but-one character is a CR, terminate there */
if (last_char > *s && last_char[-1] == APR_ASCII_CR) {
last_char--;
}
*last_char = '\0';
bytes_handled = last_char - *s;
/* If we're folding, we have more work to do.
*
* Note that if an EOS was seen, we know we can't have another line.
*/
if (fold && bytes_handled && !saw_eos) {
for (;;) {
const char *str;
apr_size_t len;
char c;
/* Clear the temp brigade for this filter read. */
apr_brigade_cleanup(bb);
/* We only care about the first byte. */
rv = ap_get_brigade(r->input_filters, bb, AP_MODE_SPECULATIVE,
APR_BLOCK_READ, 1);
if (rv != APR_SUCCESS) {
return rv;
}
if (APR_BRIGADE_EMPTY(bb)) {
break;
}
e = APR_BRIGADE_FIRST(bb);
/* If we see an EOS, don't bother doing anything more. */
if (APR_BUCKET_IS_EOS(e)) {
break;
}
rv = apr_bucket_read(e, &str, &len, APR_BLOCK_READ);
if (rv != APR_SUCCESS) {
apr_brigade_cleanup(bb);
return rv;
}
/* Found one, so call ourselves again to get the next line.
*
* FIXME: If the folding line is completely blank, should we
* stop folding? Does that require also looking at the next
* char?
*/
/* When we call destroy, the buckets are deleted, so save that
* one character we need. This simplifies our execution paths
* at the cost of one character read.
*/
c = *str;
if (c == APR_ASCII_BLANK || c == APR_ASCII_TAB) {
/* Do we have enough space? We may be full now. */
if (bytes_handled >= n) {
*read = n;
/* ensure this string is terminated */
(*s)[n-1] = '\0';
return APR_ENOSPC;
}
else {
apr_size_t next_size, next_len;
char *tmp;
/* If we're doing the allocations for them, we have to
* give ourselves a NULL and copy it on return.
*/
if (do_alloc) {
tmp = NULL;
} else {
/* We're null terminated. */
tmp = last_char;
}
next_size = n - bytes_handled;
rv = ap_rgetline_core(&tmp, next_size,
&next_len, r, 0, bb);
if (rv != APR_SUCCESS) {
return rv;
}
if (do_alloc && next_len > 0) {
char *new_buffer;
apr_size_t new_size = bytes_handled + next_len + 1;
/* we need to alloc an extra byte for a null */
new_buffer = apr_palloc(r->pool, new_size);
/* Copy what we already had. */
memcpy(new_buffer, *s, bytes_handled);
/* copy the new line, including the trailing null */
memcpy(new_buffer + bytes_handled, tmp, next_len + 1);
*s = new_buffer;
}
last_char += next_len;
bytes_handled += next_len;
}
}
else { /* next character is not tab or space */
break;
}
}
}
*read = bytes_handled;
return APR_SUCCESS;
}
#if APR_CHARSET_EBCDIC
AP_DECLARE(apr_status_t) ap_rgetline(char **s, apr_size_t n,
apr_size_t *read, request_rec *r,
int fold, apr_bucket_brigade *bb)
{
/* on ASCII boxes, ap_rgetline is a macro which simply invokes
* ap_rgetline_core with the same parms
*
* on EBCDIC boxes, each complete http protocol input line needs to be
* translated into the code page used by the compiler. Since
* ap_rgetline_core uses recursion, we do the translation in a wrapper
* function to insure that each input character gets translated only once.
*/
apr_status_t rv;
rv = ap_rgetline_core(s, n, read, r, fold, bb);
if (rv == APR_SUCCESS) {
ap_xlate_proto_from_ascii(*s, *read);
}
return rv;
}
#endif
AP_DECLARE(int) ap_getline(char *s, int n, request_rec *r, int fold)
{
char *tmp_s = s;
apr_status_t rv;
apr_size_t len;
apr_bucket_brigade *tmp_bb;
tmp_bb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
rv = ap_rgetline(&tmp_s, n, &len, r, fold, tmp_bb);
apr_brigade_destroy(tmp_bb);
/* Map the out-of-space condition to the old API. */
if (rv == APR_ENOSPC) {
return n;
}
/* Anything else is just bad. */
if (rv != APR_SUCCESS) {
return -1;
}
return (int)len;
}
/* parse_uri: break apart the uri
* Side Effects:
* - sets r->args to rest after '?' (or NULL if no '?')
* - sets r->uri to request uri (without r->args part)
* - sets r->hostname (if not set already) from request (scheme://host:port)
*/
AP_CORE_DECLARE(void) ap_parse_uri(request_rec *r, const char *uri)
{
int status = HTTP_OK;
r->unparsed_uri = apr_pstrdup(r->pool, uri);
/* http://issues.apache.org/bugzilla/show_bug.cgi?id=31875
* http://issues.apache.org/bugzilla/show_bug.cgi?id=28450
*
* This is not in fact a URI, it's a path. That matters in the
* case of a leading double-slash. We need to resolve the issue
* by normalising that out before treating it as a URI.
*/
while ((uri[0] == '/') && (uri[1] == '/')) {
++uri ;
}
if (r->method_number == M_CONNECT) {
status = apr_uri_parse_hostinfo(r->pool, uri, &r->parsed_uri);
}
else {
/* Simple syntax Errors in URLs are trapped by
* parse_uri_components().
*/
status = apr_uri_parse(r->pool, uri, &r->parsed_uri);
}
if (status == APR_SUCCESS) {
/* if it has a scheme we may need to do absoluteURI vhost stuff */
if (r->parsed_uri.scheme
&& !strcasecmp(r->parsed_uri.scheme, ap_http_scheme(r))) {
r->hostname = r->parsed_uri.hostname;
}
else if (r->method_number == M_CONNECT) {
r->hostname = r->parsed_uri.hostname;
}
r->args = r->parsed_uri.query;
r->uri = r->parsed_uri.path ? r->parsed_uri.path
: apr_pstrdup(r->pool, "/");
#if defined(OS2) || defined(WIN32)
/* Handle path translations for OS/2 and plug security hole.
* This will prevent "http://www.wherever.com/..\..\/" from
* returning a directory for the root drive.
*/
{
char *x;
for (x = r->uri; (x = strchr(x, '\\')) != NULL; )
*x = '/';
}
#endif /* OS2 || WIN32 */
}
else {
r->args = NULL;
r->hostname = NULL;
r->status = HTTP_BAD_REQUEST; /* set error status */
r->uri = apr_pstrdup(r->pool, uri);
}
}
static int read_request_line(request_rec *r, apr_bucket_brigade *bb)
{
const char *ll;
const char *uri;
const char *pro;
#if 0
conn_rec *conn = r->connection;
#endif
int major = 1, minor = 0; /* Assume HTTP/1.0 if non-"HTTP" protocol */
char http[5];
apr_size_t len;
int num_blank_lines = 0;
int max_blank_lines = r->server->limit_req_fields;
if (max_blank_lines <= 0) {
max_blank_lines = DEFAULT_LIMIT_REQUEST_FIELDS;
}
/* Read past empty lines until we get a real request line,
* a read error, the connection closes (EOF), or we timeout.
*
* We skip empty lines because browsers have to tack a CRLF on to the end
* of POSTs to support old CERN webservers. But note that we may not
* have flushed any previous response completely to the client yet.
* We delay the flush as long as possible so that we can improve
* performance for clients that are pipelining requests. If a request
* is pipelined then we won't block during the (implicit) read() below.
* If the requests aren't pipelined, then the client is still waiting
* for the final buffer flush from us, and we will block in the implicit
* read(). B_SAFEREAD ensures that the BUFF layer flushes if it will
* have to block during a read.
*/
do {
apr_status_t rv;
/* insure ap_rgetline allocates memory each time thru the loop
* if there are empty lines
*/
r->the_request = NULL;
rv = ap_rgetline(&(r->the_request), (apr_size_t)(r->server->limit_req_line + 2),
&len, r, 0, bb);
if (rv != APR_SUCCESS) {
r->request_time = apr_time_now();
/* ap_rgetline returns APR_ENOSPC if it fills up the
* buffer before finding the end-of-line. This is only going to
* happen if it exceeds the configured limit for a request-line.
*/
if (rv == APR_ENOSPC) {
r->status = HTTP_REQUEST_URI_TOO_LARGE;
r->proto_num = HTTP_VERSION(1,0);
r->protocol = apr_pstrdup(r->pool, "HTTP/1.0");
}
return 0;
}
} while ((len <= 0) && (++num_blank_lines < max_blank_lines));
/* we've probably got something to do, ignore graceful restart requests */
r->request_time = apr_time_now();
ll = r->the_request;
r->method = ap_getword_white(r->pool, &ll);
#if 0
/* XXX If we want to keep track of the Method, the protocol module should do
* it. That support isn't in the scoreboard yet. Hopefully next week
* sometime. rbb */
ap_update_connection_status(AP_CHILD_THREAD_FROM_ID(conn->id), "Method",
r->method);
#endif
uri = ap_getword_white(r->pool, &ll);
/* Provide quick information about the request method as soon as known */
r->method_number = ap_method_number_of(r->method);
if (r->method_number == M_GET && r->method[0] == 'H') {
r->header_only = 1;
}
ap_parse_uri(r, uri);
if (ll[0]) {
r->assbackwards = 0;
pro = ll;
len = strlen(ll);
} else {
r->assbackwards = 1;
pro = "HTTP/0.9";
len = 8;
}
r->protocol = apr_pstrmemdup(r->pool, pro, len);
/* XXX ap_update_connection_status(conn->id, "Protocol", r->protocol); */
/* Avoid sscanf in the common case */
if (len == 8
&& pro[0] == 'H' && pro[1] == 'T' && pro[2] == 'T' && pro[3] == 'P'
&& pro[4] == '/' && apr_isdigit(pro[5]) && pro[6] == '.'
&& apr_isdigit(pro[7])) {
r->proto_num = HTTP_VERSION(pro[5] - '0', pro[7] - '0');
}
else if (3 == sscanf(r->protocol, "%4s/%u.%u", http, &major, &minor)
&& (strcasecmp("http", http) == 0)
&& (minor < HTTP_VERSION(1, 0)) ) /* don't allow HTTP/0.1000 */
r->proto_num = HTTP_VERSION(major, minor);
else
r->proto_num = HTTP_VERSION(1, 0);
return 1;
}
AP_DECLARE(void) ap_get_mime_headers_core(request_rec *r, apr_bucket_brigade *bb)
{
char *last_field = NULL;
apr_size_t last_len = 0;
apr_size_t alloc_len = 0;
char *field;
char *value;
apr_size_t len;
int fields_read = 0;
char *tmp_field;
/*
* Read header lines until we get the empty separator line, a read error,
* the connection closes (EOF), reach the server limit, or we timeout.
*/
while(1) {
apr_status_t rv;
int folded = 0;
field = NULL;
rv = ap_rgetline(&field, r->server->limit_req_fieldsize + 2,
&len, r, 0, bb);
if (rv != APR_SUCCESS) {
r->status = HTTP_BAD_REQUEST;
/* ap_rgetline returns APR_ENOSPC if it fills up the buffer before
* finding the end-of-line. This is only going to happen if it
* exceeds the configured limit for a field size.
*/
if (rv == APR_ENOSPC && field) {
/* insure ap_escape_html will terminate correctly */
field[len - 1] = '\0';
apr_table_setn(r->notes, "error-notes",
apr_pstrcat(r->pool,
"Size of a request header field "
"exceeds server limit.<br />\n"
"<pre>\n",
ap_escape_html(r->pool, field),
"</pre>\n", NULL));
}
return;
}
if (last_field != NULL) {
if ((len > 0) && ((*field == '\t') || *field == ' ')) {
/* This line is a continuation of the preceding line(s),
* so append it to the line that we've set aside.
* Note: this uses a power-of-two allocator to avoid
* doing O(n) allocs and using O(n^2) space for
* continuations that span many many lines.
*/
apr_size_t fold_len = last_len + len + 1; /* trailing null */
if (fold_len >= (apr_size_t)(r->server->limit_req_fieldsize)) {
r->status = HTTP_BAD_REQUEST;
/* report what we have accumulated so far before the
* overflow (last_field) as the field with the problem
*/
apr_table_setn(r->notes, "error-notes",
apr_pstrcat(r->pool,
"Size of a request header field "
"after folding "
"exceeds server limit.<br />\n"
"<pre>\n",
ap_escape_html(r->pool, last_field),
"</pre>\n", NULL));
return;
}
if (fold_len > alloc_len) {
char *fold_buf;
alloc_len += alloc_len;
if (fold_len > alloc_len) {
alloc_len = fold_len;
}
fold_buf = (char *)apr_palloc(r->pool, alloc_len);
memcpy(fold_buf, last_field, last_len);
last_field = fold_buf;
}
memcpy(last_field + last_len, field, len +1); /* +1 for nul */
last_len += len;
folded = 1;
}
else /* not a continuation line */ {
if (r->server->limit_req_fields
&& (++fields_read > r->server->limit_req_fields)) {
r->status = HTTP_BAD_REQUEST;
apr_table_setn(r->notes, "error-notes",
"The number of request header fields "
"exceeds this server's limit.");
return;
}
if (!(value = strchr(last_field, ':'))) { /* Find ':' or */
r->status = HTTP_BAD_REQUEST; /* abort bad request */
apr_table_setn(r->notes, "error-notes",
apr_pstrcat(r->pool,
"Request header field is "
"missing ':' separator.<br />\n"
"<pre>\n",
ap_escape_html(r->pool,
last_field),
"</pre>\n", NULL));
return;
}
tmp_field = value - 1; /* last character of field-name */
*value++ = '\0'; /* NUL-terminate at colon */
while (*value == ' ' || *value == '\t') {
++value; /* Skip to start of value */
}
/* Strip LWS after field-name: */
while (tmp_field > last_field
&& (*tmp_field == ' ' || *tmp_field == '\t')) {
*tmp_field-- = '\0';
}
/* Strip LWS after field-value: */
tmp_field = last_field + last_len - 1;
while (tmp_field > value
&& (*tmp_field == ' ' || *tmp_field == '\t')) {
*tmp_field-- = '\0';
}
apr_table_addn(r->headers_in, last_field, value);
/* reset the alloc_len so that we'll allocate a new
* buffer if we have to do any more folding: we can't
* use the previous buffer because its contents are
* now part of r->headers_in
*/
alloc_len = 0;
} /* end if current line is not a continuation starting with tab */
}
/* Found a blank line, stop. */
if (len == 0) {
break;
}
/* Keep track of this line so that we can parse it on
* the next loop iteration. (In the folded case, last_field
* has been updated already.)
*/
if (!folded) {
last_field = field;
last_len = len;
}
}
apr_table_compress(r->headers_in, APR_OVERLAP_TABLES_MERGE);
}
AP_DECLARE(void) ap_get_mime_headers(request_rec *r)
{
apr_bucket_brigade *tmp_bb;
tmp_bb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
ap_get_mime_headers_core(r, tmp_bb);
apr_brigade_destroy(tmp_bb);
}
request_rec *ap_read_request(conn_rec *conn)
{
request_rec *r;
apr_pool_t *p;
const char *expect;
int access_status;
apr_bucket_brigade *tmp_bb;
apr_socket_t *csd;
apr_interval_time_t cur_timeout;
apr_pool_create(&p, conn->pool);
apr_pool_tag(p, "request");
r = apr_pcalloc(p, sizeof(request_rec));
r->pool = p;
r->connection = conn;
r->server = conn->base_server;
r->user = NULL;
r->ap_auth_type = NULL;
r->allowed_methods = ap_make_method_list(p, 2);
r->headers_in = apr_table_make(r->pool, 25);
r->subprocess_env = apr_table_make(r->pool, 25);
r->headers_out = apr_table_make(r->pool, 12);
r->err_headers_out = apr_table_make(r->pool, 5);
r->notes = apr_table_make(r->pool, 5);
r->request_config = ap_create_request_config(r->pool);
/* Must be set before we run create request hook */
r->proto_output_filters = conn->output_filters;
r->output_filters = r->proto_output_filters;
r->proto_input_filters = conn->input_filters;
r->input_filters = r->proto_input_filters;
ap_run_create_request(r);
r->per_dir_config = r->server->lookup_defaults;
r->sent_bodyct = 0; /* bytect isn't for body */
r->read_length = 0;
r->read_body = REQUEST_NO_BODY;
r->status = HTTP_REQUEST_TIME_OUT; /* Until we get a request */
r->the_request = NULL;
/* Begin by presuming any module can make its own path_info assumptions,
* until some module interjects and changes the value.
*/
r->used_path_info = AP_REQ_DEFAULT_PATH_INFO;
tmp_bb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
/* Get the request... */
if (!read_request_line(r, tmp_bb)) {
if (r->status == HTTP_REQUEST_URI_TOO_LARGE) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"request failed: URI too long (longer than %d)", r->server->limit_req_line);
ap_send_error_response(r, 0);
ap_update_child_status(conn->sbh, SERVER_BUSY_LOG, r);
ap_run_log_transaction(r);
apr_brigade_destroy(tmp_bb);
return r;
}
apr_brigade_destroy(tmp_bb);
return NULL;
}
/* We may have been in keep_alive_timeout mode, so toggle back
* to the normal timeout mode as we fetch the header lines,
* as necessary.
*/
csd = ap_get_module_config(conn->conn_config, &core_module);
apr_socket_timeout_get(csd, &cur_timeout);
if (cur_timeout != conn->base_server->timeout) {
apr_socket_timeout_set(csd, conn->base_server->timeout);
cur_timeout = conn->base_server->timeout;
}
if (!r->assbackwards) {
ap_get_mime_headers_core(r, tmp_bb);
if (r->status != HTTP_REQUEST_TIME_OUT) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"request failed: error reading the headers");
ap_send_error_response(r, 0);
ap_update_child_status(conn->sbh, SERVER_BUSY_LOG, r);
ap_run_log_transaction(r);
apr_brigade_destroy(tmp_bb);
return r;
}
if (apr_table_get(r->headers_in, "Transfer-Encoding")
&& apr_table_get(r->headers_in, "Content-Length")) {
/* 2616 section 4.4, point 3: "if both Transfer-Encoding
* and Content-Length are received, the latter MUST be
* ignored"; so unset it here to prevent any confusion
* later. */
apr_table_unset(r->headers_in, "Content-Length");
}
}
else {
if (r->header_only) {
/*
* Client asked for headers only with HTTP/0.9, which doesn't send
* headers! Have to dink things just to make sure the error message
* comes through...
*/
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"client sent invalid HTTP/0.9 request: HEAD %s",
r->uri);
r->header_only = 0;
r->status = HTTP_BAD_REQUEST;
ap_send_error_response(r, 0);
ap_update_child_status(conn->sbh, SERVER_BUSY_LOG, r);
ap_run_log_transaction(r);
apr_brigade_destroy(tmp_bb);
return r;
}
}
apr_brigade_destroy(tmp_bb);
r->status = HTTP_OK; /* Until further notice. */
/* update what we think the virtual host is based on the headers we've
* now read. may update status.
*/
ap_update_vhost_from_headers(r);
/* Toggle to the Host:-based vhost's timeout mode to fetch the
* request body and send the response body, if needed.
*/
if (cur_timeout != r->server->timeout) {
apr_socket_timeout_set(csd, r->server->timeout);
cur_timeout = r->server->timeout;
}
/* we may have switched to another server */
r->per_dir_config = r->server->lookup_defaults;
if ((!r->hostname && (r->proto_num >= HTTP_VERSION(1, 1)))
|| ((r->proto_num == HTTP_VERSION(1, 1))
&& !apr_table_get(r->headers_in, "Host"))) {
/*
* Client sent us an HTTP/1.1 or later request without telling us the
* hostname, either with a full URL or a Host: header. We therefore
* need to (as per the 1.1 spec) send an error. As a special case,
* HTTP/1.1 mentions twice (S9, S14.23) that a request MUST contain
* a Host: header, and the server MUST respond with 400 if it doesn't.
*/
r->status = HTTP_BAD_REQUEST;
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"client sent HTTP/1.1 request without hostname "
"(see RFC2616 section 14.23): %s", r->uri);
}
/*
* Add the HTTP_IN filter here to ensure that ap_discard_request_body
* called by ap_die and by ap_send_error_response works correctly on
* status codes that do not cause the connection to be dropped and
* in situations where the connection should be kept alive.
*/
ap_add_input_filter_handle(ap_http_input_filter_handle,
NULL, r, r->connection);
if (r->status != HTTP_OK) {
ap_send_error_response(r, 0);
ap_update_child_status(conn->sbh, SERVER_BUSY_LOG, r);
ap_run_log_transaction(r);
return r;
}
if ((access_status = ap_run_post_read_request(r))) {
ap_die(access_status, r);
ap_update_child_status(conn->sbh, SERVER_BUSY_LOG, r);
ap_run_log_transaction(r);
return NULL;
}
if (((expect = apr_table_get(r->headers_in, "Expect")) != NULL)
&& (expect[0] != '\0')) {
/*
* The Expect header field was added to HTTP/1.1 after RFC 2068
* as a means to signal when a 100 response is desired and,
* unfortunately, to signal a poor man's mandatory extension that
* the server must understand or return 417 Expectation Failed.
*/
if (strcasecmp(expect, "100-continue") == 0) {
r->expecting_100 = 1;
}
else {
r->status = HTTP_EXPECTATION_FAILED;
ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
"client sent an unrecognized expectation value of "
"Expect: %s", expect);
ap_send_error_response(r, 0);
ap_update_child_status(conn->sbh, SERVER_BUSY_LOG, r);
ap_run_log_transaction(r);
return r;
}
}
return r;
}
/* if a request with a body creates a subrequest, clone the original request's
* input headers minus any headers pertaining to the body which has already
* been read. out-of-line helper function for ap_set_sub_req_protocol.
*/
static void clone_headers_no_body(request_rec *rnew,
const request_rec *r)
{
rnew->headers_in = apr_table_copy(rnew->pool, r->headers_in);
apr_table_unset(rnew->headers_in, "Content-Encoding");
apr_table_unset(rnew->headers_in, "Content-Language");
apr_table_unset(rnew->headers_in, "Content-Length");
apr_table_unset(rnew->headers_in, "Content-Location");
apr_table_unset(rnew->headers_in, "Content-MD5");
apr_table_unset(rnew->headers_in, "Content-Range");
apr_table_unset(rnew->headers_in, "Content-Type");
apr_table_unset(rnew->headers_in, "Expires");
apr_table_unset(rnew->headers_in, "Last-Modified");
apr_table_unset(rnew->headers_in, "Transfer-Encoding");
}
/*
* A couple of other functions which initialize some of the fields of
* a request structure, as appropriate for adjuncts of one kind or another
* to a request in progress. Best here, rather than elsewhere, since
* *someone* has to set the protocol-specific fields...
*/
AP_DECLARE(void) ap_set_sub_req_protocol(request_rec *rnew,
const request_rec *r)
{
rnew->the_request = r->the_request; /* Keep original request-line */
rnew->assbackwards = 1; /* Don't send headers from this. */
rnew->no_local_copy = 1; /* Don't try to send HTTP_NOT_MODIFIED for a
* fragment. */
rnew->method = "GET";
rnew->method_number = M_GET;
rnew->protocol = "INCLUDED";
rnew->status = HTTP_OK;
/* did the original request have a body? (e.g. POST w/SSI tags)
* if so, make sure the subrequest doesn't inherit body headers
*/
if (apr_table_get(r->headers_in, "Content-Length")
|| apr_table_get(r->headers_in, "Transfer-Encoding")) {
clone_headers_no_body(rnew, r);
} else {
/* no body (common case). clone headers the cheap way */
rnew->headers_in = r->headers_in;
}
rnew->subprocess_env = apr_table_copy(rnew->pool, r->subprocess_env);
rnew->headers_out = apr_table_make(rnew->pool, 5);
rnew->err_headers_out = apr_table_make(rnew->pool, 5);
rnew->notes = apr_table_make(rnew->pool, 5);
rnew->expecting_100 = r->expecting_100;
rnew->read_length = r->read_length;
rnew->read_body = REQUEST_NO_BODY;
rnew->main = (request_rec *) r;
}
static void end_output_stream(request_rec *r)
{
conn_rec *c = r->connection;
apr_bucket_brigade *bb;
apr_bucket *b;
bb = apr_brigade_create(r->pool, c->bucket_alloc);
b = apr_bucket_eos_create(c->bucket_alloc);
APR_BRIGADE_INSERT_TAIL(bb, b);
ap_pass_brigade(r->output_filters, bb);
}
AP_DECLARE(void) ap_finalize_sub_req_protocol(request_rec *sub)
{
/* tell the filter chain there is no more content coming */
if (!sub->eos_sent) {
end_output_stream(sub);
}
}
/* finalize_request_protocol is called at completion of sending the
* response. Its sole purpose is to send the terminating protocol
* information for any wrappers around the response message body
* (i.e., transfer encodings). It should have been named finalize_response.
*/
AP_DECLARE(void) ap_finalize_request_protocol(request_rec *r)
{
(void) ap_discard_request_body(r);
/* tell the filter chain there is no more content coming */
if (!r->eos_sent) {
end_output_stream(r);
}
}
/*
* Support for the Basic authentication protocol, and a bit for Digest.
*/
AP_DECLARE(void) ap_note_auth_failure(request_rec *r)
{
const char *type = ap_auth_type(r);
if (type) {
if (!strcasecmp(type, "Basic"))
ap_note_basic_auth_failure(r);
else if (!strcasecmp(type, "Digest"))
ap_note_digest_auth_failure(r);
}
else {
ap_log_rerror(APLOG_MARK, APLOG_ERR,
0, r, "need AuthType to note auth failure: %s", r->uri);
}
}
AP_DECLARE(void) ap_note_basic_auth_failure(request_rec *r)
{
const char *type = ap_auth_type(r);
/* if there is no AuthType configure or it is something other than
* Basic, let ap_note_auth_failure() deal with it
*/
if (!type || strcasecmp(type, "Basic"))
ap_note_auth_failure(r);
else
apr_table_setn(r->err_headers_out,
(PROXYREQ_PROXY == r->proxyreq) ? "Proxy-Authenticate"
: "WWW-Authenticate",
apr_pstrcat(r->pool, "Basic realm=\"", ap_auth_name(r),
"\"", NULL));
}
AP_DECLARE(void) ap_note_digest_auth_failure(request_rec *r)
{
apr_table_setn(r->err_headers_out,
(PROXYREQ_PROXY == r->proxyreq) ? "Proxy-Authenticate"
: "WWW-Authenticate",
apr_psprintf(r->pool, "Digest realm=\"%s\", nonce=\""
"%" APR_UINT64_T_HEX_FMT "\"",
ap_auth_name(r), (apr_uint64_t)r->request_time));
}
AP_DECLARE(int) ap_get_basic_auth_pw(request_rec *r, const char **pw)
{
const char *auth_line = apr_table_get(r->headers_in,
(PROXYREQ_PROXY == r->proxyreq)
? "Proxy-Authorization"
: "Authorization");
const char *t;
if (!(t = ap_auth_type(r)) || strcasecmp(t, "Basic"))
return DECLINED;
if (!ap_auth_name(r)) {
ap_log_rerror(APLOG_MARK, APLOG_ERR,
0, r, "need AuthName: %s", r->uri);
return HTTP_INTERNAL_SERVER_ERROR;
}
if (!auth_line) {
ap_note_basic_auth_failure(r);
return HTTP_UNAUTHORIZED;
}
if (strcasecmp(ap_getword(r->pool, &auth_line, ' '), "Basic")) {
/* Client tried to authenticate using wrong auth scheme */
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"client used wrong authentication scheme: %s", r->uri);
ap_note_basic_auth_failure(r);
return HTTP_UNAUTHORIZED;
}
while (*auth_line == ' ' || *auth_line == '\t') {
auth_line++;
}
t = ap_pbase64decode(r->pool, auth_line);
r->user = ap_getword_nulls (r->pool, &t, ':');
r->ap_auth_type = "Basic";
*pw = t;
return OK;
}
struct content_length_ctx {
int data_sent; /* true if the C-L filter has already sent at
* least one bucket on to the next output filter
* for this request
*/
};
/* This filter computes the content length, but it also computes the number
* of bytes sent to the client. This means that this filter will always run
* through all of the buckets in all brigades
*/
AP_CORE_DECLARE_NONSTD(apr_status_t) ap_content_length_filter(
ap_filter_t *f,
apr_bucket_brigade *b)
{
request_rec *r = f->r;
struct content_length_ctx *ctx;
apr_bucket *e;
int eos = 0;
apr_read_type_e eblock = APR_NONBLOCK_READ;
ctx = f->ctx;
if (!ctx) {
f->ctx = ctx = apr_palloc(r->pool, sizeof(*ctx));
ctx->data_sent = 0;
}
/* Loop through this set of buckets to compute their length
*/
e = APR_BRIGADE_FIRST(b);
while (e != APR_BRIGADE_SENTINEL(b)) {
if (APR_BUCKET_IS_EOS(e)) {
eos = 1;
break;
}
if (e->length == (apr_size_t)-1) {
apr_size_t len;
const char *ignored;
apr_status_t rv;
/* This is probably a pipe bucket. Send everything
* prior to this, and then read the data for this bucket.
*/
rv = apr_bucket_read(e, &ignored, &len, eblock);
if (rv == APR_SUCCESS) {
/* Attempt a nonblocking read next time through */
eblock = APR_NONBLOCK_READ;
r->bytes_sent += len;
}
else if (APR_STATUS_IS_EAGAIN(rv)) {
/* Output everything prior to this bucket, and then
* do a blocking read on the next batch.
*/
if (e != APR_BRIGADE_FIRST(b)) {
apr_bucket_brigade *split = apr_brigade_split(b, e);
apr_bucket *flush = apr_bucket_flush_create(r->connection->bucket_alloc);
APR_BRIGADE_INSERT_TAIL(b, flush);
rv = ap_pass_brigade(f->next, b);
if (rv != APR_SUCCESS || f->c->aborted) {
apr_brigade_destroy(split);
return rv;
}
b = split;
e = APR_BRIGADE_FIRST(b);
ctx->data_sent = 1;
}
eblock = APR_BLOCK_READ;
continue;
}
else {
ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
"ap_content_length_filter: "
"apr_bucket_read() failed");
return rv;
}
}
else {
r->bytes_sent += e->length;
}
e = APR_BUCKET_NEXT(e);
}
/* If we've now seen the entire response and it's otherwise
* okay to set the C-L in the response header, then do so now.
*
* We can only set a C-L in the response header if we haven't already
* sent any buckets on to the next output filter for this request.
*/
if (ctx->data_sent == 0 && eos &&
/* don't whack the C-L if it has already been set for a HEAD
* by something like proxy. the brigade only has an EOS bucket
* in this case, making r->bytes_sent zero.
*
* if r->bytes_sent > 0 we have a (temporary) body whose length may
* have been changed by a filter. the C-L header might not have been
* updated so we do it here. long term it would be cleaner to have
* such filters update or remove the C-L header, and just use it
* if present.
*/
!(r->header_only && r->bytes_sent == 0 &&
apr_table_get(r->headers_out, "Content-Length"))) {
ap_set_content_length(r, r->bytes_sent);
}
ctx->data_sent = 1;
return ap_pass_brigade(f->next, b);
}
/*
* Send the body of a response to the client.
*/
AP_DECLARE(apr_status_t) ap_send_fd(apr_file_t *fd, request_rec *r,
apr_off_t offset, apr_size_t len,
apr_size_t *nbytes)
{
conn_rec *c = r->connection;
apr_bucket_brigade *bb = NULL;
apr_status_t rv;
bb = apr_brigade_create(r->pool, c->bucket_alloc);
apr_brigade_insert_file(bb, fd, 0, len, r->pool);
rv = ap_pass_brigade(r->output_filters, bb);
if (rv != APR_SUCCESS) {
*nbytes = 0; /* no way to tell how many were actually sent */
}
else {
*nbytes = len;
}
return rv;
}
#if APR_HAS_MMAP
/* send data from an in-memory buffer */
AP_DECLARE(size_t) ap_send_mmap(apr_mmap_t *mm, request_rec *r, size_t offset,
size_t length)
{
conn_rec *c = r->connection;
apr_bucket_brigade *bb = NULL;
apr_bucket *b;
bb = apr_brigade_create(r->pool, c->bucket_alloc);
b = apr_bucket_mmap_create(mm, offset, length, c->bucket_alloc);
APR_BRIGADE_INSERT_TAIL(bb, b);
ap_pass_brigade(r->output_filters, bb);
return mm->size; /* XXX - change API to report apr_status_t? */
}
#endif /* APR_HAS_MMAP */
typedef struct {
apr_bucket_brigade *bb;
} old_write_filter_ctx;
AP_CORE_DECLARE_NONSTD(apr_status_t) ap_old_write_filter(
ap_filter_t *f, apr_bucket_brigade *bb)
{
old_write_filter_ctx *ctx = f->ctx;
AP_DEBUG_ASSERT(ctx);
if (ctx->bb != NULL) {
/* whatever is coming down the pipe (we don't care), we
* can simply insert our buffered data at the front and
* pass the whole bundle down the chain.
*/
APR_BRIGADE_CONCAT(ctx->bb, bb);
bb = ctx->bb;
ctx->bb = NULL;
}
return ap_pass_brigade(f->next, bb);
}
static apr_status_t buffer_output(request_rec *r,
const char *str, apr_size_t len)
{
conn_rec *c = r->connection;
ap_filter_t *f;
old_write_filter_ctx *ctx;
if (len == 0)
return APR_SUCCESS;
/* future optimization: record some flags in the request_rec to
* say whether we've added our filter, and whether it is first.
*/
/* this will typically exit on the first test */
for (f = r->output_filters; f != NULL; f = f->next) {
if (ap_old_write_func == f->frec)
break;
}
if (f == NULL) {
/* our filter hasn't been added yet */
ctx = apr_pcalloc(r->pool, sizeof(*ctx));
ap_add_output_filter("OLD_WRITE", ctx, r, r->connection);
f = r->output_filters;
}
/* if the first filter is not our buffering filter, then we have to
* deliver the content through the normal filter chain
*/
if (f != r->output_filters) {
apr_bucket_brigade *bb = apr_brigade_create(r->pool, c->bucket_alloc);
apr_bucket *b = apr_bucket_transient_create(str, len, c->bucket_alloc);
APR_BRIGADE_INSERT_TAIL(bb, b);
return ap_pass_brigade(r->output_filters, bb);
}
/* grab the context from our filter */
ctx = r->output_filters->ctx;
if (ctx->bb == NULL) {
ctx->bb = apr_brigade_create(r->pool, c->bucket_alloc);
}
return ap_fwrite(f->next, ctx->bb, str, len);
}
AP_DECLARE(int) ap_rputc(int c, request_rec *r)
{
char c2 = (char)c;
if (r->connection->aborted) {
return -1;
}
if (buffer_output(r, &c2, 1) != APR_SUCCESS)
return -1;
return c;
}
AP_DECLARE(int) ap_rputs(const char *str, request_rec *r)
{
apr_size_t len;
if (r->connection->aborted)
return -1;
if (buffer_output(r, str, len = strlen(str)) != APR_SUCCESS)
return -1;
return len;
}
AP_DECLARE(int) ap_rwrite(const void *buf, int nbyte, request_rec *r)
{
if (r->connection->aborted)
return -1;
if (buffer_output(r, buf, nbyte) != APR_SUCCESS)
return -1;
return nbyte;
}
struct ap_vrprintf_data {
apr_vformatter_buff_t vbuff;
request_rec *r;
char *buff;
};
static apr_status_t r_flush(apr_vformatter_buff_t *buff)
{
/* callback function passed to ap_vformatter to be called when
* vformatter needs to write into buff and buff.curpos > buff.endpos */
/* ap_vrprintf_data passed as a apr_vformatter_buff_t, which is then
* "downcast" to an ap_vrprintf_data */
struct ap_vrprintf_data *vd = (struct ap_vrprintf_data*)buff;
if (vd->r->connection->aborted)
return -1;
/* r_flush is called when vbuff is completely full */
if (buffer_output(vd->r, vd->buff, AP_IOBUFSIZE)) {
return -1;
}
/* reset the buffer position */
vd->vbuff.curpos = vd->buff;
vd->vbuff.endpos = vd->buff + AP_IOBUFSIZE;
return APR_SUCCESS;
}
AP_DECLARE(int) ap_vrprintf(request_rec *r, const char *fmt, va_list va)
{
apr_size_t written;
struct ap_vrprintf_data vd;
char vrprintf_buf[AP_IOBUFSIZE];
vd.vbuff.curpos = vrprintf_buf;
vd.vbuff.endpos = vrprintf_buf + AP_IOBUFSIZE;
vd.r = r;
vd.buff = vrprintf_buf;
if (r->connection->aborted)
return -1;
written = apr_vformatter(r_flush, &vd.vbuff, fmt, va);
/* tack on null terminator on remaining string */
*(vd.vbuff.curpos) = '\0';
if (written != -1) {
int n = vd.vbuff.curpos - vrprintf_buf;
/* last call to buffer_output, to finish clearing the buffer */
if (buffer_output(r, vrprintf_buf,n) != APR_SUCCESS)
return -1;
written += n;
}
return written;
}
AP_DECLARE_NONSTD(int) ap_rprintf(request_rec *r, const char *fmt, ...)
{
va_list va;
int n;
if (r->connection->aborted)
return -1;
va_start(va, fmt);
n = ap_vrprintf(r, fmt, va);
va_end(va);
return n;
}
AP_DECLARE_NONSTD(int) ap_rvputs(request_rec *r, ...)
{
va_list va;
const char *s;
apr_size_t len;
apr_size_t written = 0;
if (r->connection->aborted)
return -1;
/* ### TODO: if the total output is large, put all the strings
* ### into a single brigade, rather than flushing each time we
* ### fill the buffer
*/
va_start(va, r);
while (1) {
s = va_arg(va, const char *);
if (s == NULL)
break;
len = strlen(s);
if (buffer_output(r, s, len) != APR_SUCCESS) {
return -1;
}
written += len;
}
va_end(va);
return written;
}
AP_DECLARE(int) ap_rflush(request_rec *r)
{
conn_rec *c = r->connection;
apr_bucket_brigade *bb;
apr_bucket *b;
bb = apr_brigade_create(r->pool, c->bucket_alloc);
b = apr_bucket_flush_create(c->bucket_alloc);
APR_BRIGADE_INSERT_TAIL(bb, b);
if (ap_pass_brigade(r->output_filters, bb) != APR_SUCCESS)
return -1;
return 0;
}
/*
* This function sets the Last-Modified output header field to the value
* of the mtime field in the request structure - rationalized to keep it from
* being in the future.
*/
AP_DECLARE(void) ap_set_last_modified(request_rec *r)
{
if (!r->assbackwards) {
apr_time_t mod_time = ap_rationalize_mtime(r, r->mtime);
char *datestr = apr_palloc(r->pool, APR_RFC822_DATE_LEN);
apr_rfc822_date(datestr, mod_time);
apr_table_setn(r->headers_out, "Last-Modified", datestr);
}
}
AP_IMPLEMENT_HOOK_RUN_ALL(int,post_read_request,
(request_rec *r), (r), OK, DECLINED)
AP_IMPLEMENT_HOOK_RUN_ALL(int,log_transaction,
(request_rec *r), (r), OK, DECLINED)
AP_IMPLEMENT_HOOK_RUN_FIRST(const char *,http_scheme,
(const request_rec *r), (r), NULL)
AP_IMPLEMENT_HOOK_RUN_FIRST(unsigned short,default_port,
(const request_rec *r), (r), 0)
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