#include "apr.h"
#include "apr_strings.h"
#include "apr_buckets.h"
#include "apr_lib.h"
#include "apr_signal.h"
#define APR_WANT_STDIO
#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"
#include "apr_date.h"
#include "util_charset.h"
#include "util_ebcdic.h"
#include "util_time.h"
#include "ap_mpm.h"
#include "mod_core.h"
#if APR_HAVE_STDARG_H
#include <stdarg.h>
#endif
#if APR_HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef UTS21
static const char * status_lines[RESPONSE_CODES] =
#else
static const char * const status_lines[RESPONSE_CODES] =
#endif
{
"100 Continue",
"101 Switching Protocols",
"102 Processing",
#define LEVEL_200 3
"200 OK",
"201 Created",
"202 Accepted",
"203 Non-Authoritative Information",
"204 No Content",
"205 Reset Content",
"206 Partial Content",
"207 Multi-Status",
#define LEVEL_300 11
"300 Multiple Choices",
"301 Moved Permanently",
"302 Found",
"303 See Other",
"304 Not Modified",
"305 Use Proxy",
"306 unused",
"307 Temporary Redirect",
#define LEVEL_400 19
"400 Bad Request",
"401 Authorization Required",
"402 Payment Required",
"403 Forbidden",
"404 Not Found",
"405 Method Not Allowed",
"406 Not Acceptable",
"407 Proxy Authentication Required",
"408 Request Time-out",
"409 Conflict",
"410 Gone",
"411 Length Required",
"412 Precondition Failed",
"413 Request Entity Too Large",
"414 Request-URI Too Large",
"415 Unsupported Media Type",
"416 Requested Range Not Satisfiable",
"417 Expectation Failed",
"418 unused",
"419 unused",
"420 unused",
"421 unused",
"422 Unprocessable Entity",
"423 Locked",
"424 Failed Dependency",
"425 No code",
"426 Upgrade Required",
#define LEVEL_500 46
"500 Internal Server Error",
"501 Method Not Implemented",
"502 Bad Gateway",
"503 Service Temporarily Unavailable",
"504 Gateway Time-out",
"505 HTTP Version Not Supported",
"506 Variant Also Negotiates",
"507 Insufficient Storage",
"508 unused",
"509 unused",
"510 Not Extended"
};
APR_HOOK_STRUCT(
APR_HOOK_LINK(insert_error_filter)
)
AP_IMPLEMENT_HOOK_VOID(insert_error_filter, (request_rec *r), (r))
#define METHOD_NUMBER_FIRST (M_INVALID + 1)
#define METHOD_NUMBER_LAST 62
AP_DECLARE(int) ap_set_keepalive(request_rec *r)
{
int ka_sent = 0;
int left = r->server->keep_alive_max - r->connection->keepalives;
int wimpy = ap_find_token(r->pool,
apr_table_get(r->headers_out, "Connection"),
"close");
const char *conn = apr_table_get(r->headers_in, "Connection");
if ((r->connection->keepalive != AP_CONN_CLOSE)
&& !r->expecting_100
&& ((r->status == HTTP_NOT_MODIFIED)
|| (r->status == HTTP_NO_CONTENT)
|| r->header_only
|| apr_table_get(r->headers_out, "Content-Length")
|| ap_find_last_token(r->pool,
apr_table_get(r->headers_out,
"Transfer-Encoding"),
"chunked")
|| ((r->proto_num >= HTTP_VERSION(1,1))
&& (r->chunked = 1)))
&& r->server->keep_alive
&& (r->server->keep_alive_timeout > 0)
&& ((r->server->keep_alive_max == 0)
|| (left > 0))
&& !ap_status_drops_connection(r->status)
&& !wimpy
&& !ap_find_token(r->pool, conn, "close")
&& (!apr_table_get(r->subprocess_env, "nokeepalive")
|| apr_table_get(r->headers_in, "Via"))
&& ((ka_sent = ap_find_token(r->pool, conn, "keep-alive"))
|| (r->proto_num >= HTTP_VERSION(1,1)))
&& !ap_graceful_stop_signalled()) {
r->connection->keepalive = AP_CONN_KEEPALIVE;
r->connection->keepalives++;
if (ka_sent) {
if (r->server->keep_alive_max) {
apr_table_setn(r->headers_out, "Keep-Alive",
apr_psprintf(r->pool, "timeout=%d, max=%d",
(int)apr_time_sec(r->server->keep_alive_timeout),
left));
}
else {
apr_table_setn(r->headers_out, "Keep-Alive",
apr_psprintf(r->pool, "timeout=%d",
(int)apr_time_sec(r->server->keep_alive_timeout)));
}
apr_table_mergen(r->headers_out, "Connection", "Keep-Alive");
}
return 1;
}
if (!wimpy) {
apr_table_mergen(r->headers_out, "Connection", "close");
}
if ((r->connection->keepalive != AP_CONN_CLOSE)
&& r->server->keep_alive_max
&& !left) {
r->connection->keepalives++;
}
r->connection->keepalive = AP_CONN_CLOSE;
return 0;
}
AP_DECLARE(int) ap_meets_conditions(request_rec *r)
{
const char *etag;
const char *if_match, *if_modified_since, *if_unmodified, *if_nonematch;
apr_time_t tmp_time;
apr_int64_t mtime;
int not_modified = 0;
if (!ap_is_HTTP_SUCCESS(r->status) || r->no_local_copy) {
return OK;
}
etag = apr_table_get(r->headers_out, "ETag");
tmp_time = ((r->mtime != 0) ? r->mtime : apr_time_now());
mtime = apr_time_sec(tmp_time);
if ((if_match = apr_table_get(r->headers_in, "If-Match")) != NULL) {
if (if_match[0] != '*'
&& (etag == NULL || etag[0] == 'W'
|| !ap_find_list_item(r->pool, if_match, etag))) {
return HTTP_PRECONDITION_FAILED;
}
}
else {
if_unmodified = apr_table_get(r->headers_in, "If-Unmodified-Since");
if (if_unmodified != NULL) {
apr_time_t ius = apr_date_parse_http(if_unmodified);
if ((ius != APR_DATE_BAD) && (mtime > apr_time_sec(ius))) {
return HTTP_PRECONDITION_FAILED;
}
}
}
if_nonematch = apr_table_get(r->headers_in, "If-None-Match");
if (if_nonematch != NULL) {
if (r->method_number == M_GET) {
if (if_nonematch[0] == '*') {
not_modified = 1;
}
else if (etag != NULL) {
if (apr_table_get(r->headers_in, "Range")) {
not_modified = etag[0] != 'W'
&& ap_find_list_item(r->pool,
if_nonematch, etag);
}
else {
not_modified = ap_find_list_item(r->pool,
if_nonematch, etag);
}
}
}
else if (if_nonematch[0] == '*'
|| (etag != NULL
&& ap_find_list_item(r->pool, if_nonematch, etag))) {
return HTTP_PRECONDITION_FAILED;
}
}
if (r->method_number == M_GET
&& (not_modified || !if_nonematch)
&& (if_modified_since =
apr_table_get(r->headers_in,
"If-Modified-Since")) != NULL) {
apr_time_t ims_time;
apr_int64_t ims, reqtime;
ims_time = apr_date_parse_http(if_modified_since);
ims = apr_time_sec(ims_time);
reqtime = apr_time_sec(r->request_time);
not_modified = ims >= mtime && ims <= reqtime;
}
if (not_modified) {
return HTTP_NOT_MODIFIED;
}
return OK;
}
static apr_hash_t *methods_registry = NULL;
static int cur_method_number = METHOD_NUMBER_FIRST;
static void register_one_method(apr_pool_t *p, const char *methname,
int methnum)
{
int *pnum = apr_palloc(p, sizeof(*pnum));
*pnum = methnum;
apr_hash_set(methods_registry, methname, APR_HASH_KEY_STRING, pnum);
}
static apr_status_t ap_method_registry_destroy(void *notused)
{
methods_registry = NULL;
cur_method_number = METHOD_NUMBER_FIRST;
return APR_SUCCESS;
}
AP_DECLARE(void) ap_method_registry_init(apr_pool_t *p)
{
methods_registry = apr_hash_make(p);
apr_pool_cleanup_register(p, NULL,
ap_method_registry_destroy,
apr_pool_cleanup_null);
register_one_method(p, "GET", M_GET);
register_one_method(p, "PUT", M_PUT);
register_one_method(p, "POST", M_POST);
register_one_method(p, "DELETE", M_DELETE);
register_one_method(p, "CONNECT", M_CONNECT);
register_one_method(p, "OPTIONS", M_OPTIONS);
register_one_method(p, "TRACE", M_TRACE);
register_one_method(p, "PATCH", M_PATCH);
register_one_method(p, "PROPFIND", M_PROPFIND);
register_one_method(p, "PROPPATCH", M_PROPPATCH);
register_one_method(p, "MKCOL", M_MKCOL);
register_one_method(p, "COPY", M_COPY);
register_one_method(p, "MOVE", M_MOVE);
register_one_method(p, "LOCK", M_LOCK);
register_one_method(p, "UNLOCK", M_UNLOCK);
register_one_method(p, "VERSION-CONTROL", M_VERSION_CONTROL);
register_one_method(p, "CHECKOUT", M_CHECKOUT);
register_one_method(p, "UNCHECKOUT", M_UNCHECKOUT);
register_one_method(p, "CHECKIN", M_CHECKIN);
register_one_method(p, "UPDATE", M_UPDATE);
register_one_method(p, "LABEL", M_LABEL);
register_one_method(p, "REPORT", M_REPORT);
register_one_method(p, "MKWORKSPACE", M_MKWORKSPACE);
register_one_method(p, "MKACTIVITY", M_MKACTIVITY);
register_one_method(p, "BASELINE-CONTROL", M_BASELINE_CONTROL);
register_one_method(p, "MERGE", M_MERGE);
}
AP_DECLARE(int) ap_method_register(apr_pool_t *p, const char *methname)
{
int *methnum;
if (methods_registry == NULL) {
ap_method_registry_init(p);
}
if (methname == NULL) {
return M_INVALID;
}
methnum = (int *)apr_hash_get(methods_registry, methname,
APR_HASH_KEY_STRING);
if (methnum != NULL)
return *methnum;
if (cur_method_number > METHOD_NUMBER_LAST) {
ap_log_perror(APLOG_MARK, APLOG_ERR, 0, p,
"Maximum new request methods %d reached while "
"registering method %s.",
METHOD_NUMBER_LAST, methname);
return M_INVALID;
}
register_one_method(p, methname, cur_method_number);
return cur_method_number++;
}
#define UNKNOWN_METHOD (-1)
static int lookup_builtin_method(const char *method, apr_size_t len)
{
switch (len)
{
case 3:
switch (method[0])
{
case 'P':
return (method[1] == 'U'
&& method[2] == 'T'
? M_PUT : UNKNOWN_METHOD);
case 'G':
return (method[1] == 'E'
&& method[2] == 'T'
? M_GET : UNKNOWN_METHOD);
default:
return UNKNOWN_METHOD;
}
case 4:
switch (method[0])
{
case 'H':
return (method[1] == 'E'
&& method[2] == 'A'
&& method[3] == 'D'
? M_GET : UNKNOWN_METHOD);
case 'P':
return (method[1] == 'O'
&& method[2] == 'S'
&& method[3] == 'T'
? M_POST : UNKNOWN_METHOD);
case 'M':
return (method[1] == 'O'
&& method[2] == 'V'
&& method[3] == 'E'
? M_MOVE : UNKNOWN_METHOD);
case 'L':
return (method[1] == 'O'
&& method[2] == 'C'
&& method[3] == 'K'
? M_LOCK : UNKNOWN_METHOD);
case 'C':
return (method[1] == 'O'
&& method[2] == 'P'
&& method[3] == 'Y'
? M_COPY : UNKNOWN_METHOD);
default:
return UNKNOWN_METHOD;
}
case 5:
switch (method[2])
{
case 'T':
return (memcmp(method, "PATCH", 5) == 0
? M_PATCH : UNKNOWN_METHOD);
case 'R':
return (memcmp(method, "MERGE", 5) == 0
? M_MERGE : UNKNOWN_METHOD);
case 'C':
return (memcmp(method, "MKCOL", 5) == 0
? M_MKCOL : UNKNOWN_METHOD);
case 'B':
return (memcmp(method, "LABEL", 5) == 0
? M_LABEL : UNKNOWN_METHOD);
case 'A':
return (memcmp(method, "TRACE", 5) == 0
? M_TRACE : UNKNOWN_METHOD);
default:
return UNKNOWN_METHOD;
}
case 6:
switch (method[0])
{
case 'U':
switch (method[5])
{
case 'K':
return (memcmp(method, "UNLOCK", 6) == 0
? M_UNLOCK : UNKNOWN_METHOD);
case 'E':
return (memcmp(method, "UPDATE", 6) == 0
? M_UPDATE : UNKNOWN_METHOD);
default:
return UNKNOWN_METHOD;
}
case 'R':
return (memcmp(method, "REPORT", 6) == 0
? M_REPORT : UNKNOWN_METHOD);
case 'D':
return (memcmp(method, "DELETE", 6) == 0
? M_DELETE : UNKNOWN_METHOD);
default:
return UNKNOWN_METHOD;
}
case 7:
switch (method[1])
{
case 'P':
return (memcmp(method, "OPTIONS", 7) == 0
? M_OPTIONS : UNKNOWN_METHOD);
case 'O':
return (memcmp(method, "CONNECT", 7) == 0
? M_CONNECT : UNKNOWN_METHOD);
case 'H':
return (memcmp(method, "CHECKIN", 7) == 0
? M_CHECKIN : UNKNOWN_METHOD);
default:
return UNKNOWN_METHOD;
}
case 8:
switch (method[0])
{
case 'P':
return (memcmp(method, "PROPFIND", 8) == 0
? M_PROPFIND : UNKNOWN_METHOD);
case 'C':
return (memcmp(method, "CHECKOUT", 8) == 0
? M_CHECKOUT : UNKNOWN_METHOD);
default:
return UNKNOWN_METHOD;
}
case 9:
return (memcmp(method, "PROPPATCH", 9) == 0
? M_PROPPATCH : UNKNOWN_METHOD);
case 10:
switch (method[0])
{
case 'U':
return (memcmp(method, "UNCHECKOUT", 10) == 0
? M_UNCHECKOUT : UNKNOWN_METHOD);
case 'M':
return (memcmp(method, "MKACTIVITY", 10) == 0
? M_MKACTIVITY : UNKNOWN_METHOD);
default:
return UNKNOWN_METHOD;
}
case 11:
return (memcmp(method, "MKWORKSPACE", 11) == 0
? M_MKWORKSPACE : UNKNOWN_METHOD);
case 15:
return (memcmp(method, "VERSION-CONTROL", 15) == 0
? M_VERSION_CONTROL : UNKNOWN_METHOD);
case 16:
return (memcmp(method, "BASELINE-CONTROL", 16) == 0
? M_BASELINE_CONTROL : UNKNOWN_METHOD);
default:
return UNKNOWN_METHOD;
}
}
AP_DECLARE(int) ap_method_number_of(const char *method)
{
int len = strlen(method);
int which = lookup_builtin_method(method, len);
if (which != UNKNOWN_METHOD)
return which;
if (methods_registry != NULL) {
int *methnum = apr_hash_get(methods_registry, method, len);
if (methnum != NULL) {
return *methnum;
}
}
return M_INVALID;
}
AP_DECLARE(const char *) ap_method_name_of(apr_pool_t *p, int methnum)
{
apr_hash_index_t *hi = apr_hash_first(p, methods_registry);
for (; hi; hi = apr_hash_next(hi)) {
const void *key;
void *val;
apr_hash_this(hi, &key, NULL, &val);
if (*(int *)val == methnum)
return key;
}
return NULL;
}
AP_DECLARE(int) ap_index_of_response(int status)
{
static int shortcut[6] = {0, LEVEL_200, LEVEL_300, LEVEL_400,
LEVEL_500, RESPONSE_CODES};
int i, pos;
if (status < 100) {
return LEVEL_500;
}
for (i = 0; i < 5; i++) {
status -= 100;
if (status < 100) {
pos = (status + shortcut[i]);
if (pos < shortcut[i + 1]) {
return pos;
}
else {
return LEVEL_500;
}
}
}
return LEVEL_500;
}
AP_DECLARE(const char *) ap_get_status_line(int status)
{
return status_lines[ap_index_of_response(status)];
}
static char *make_allow(request_rec *r)
{
char *list;
apr_int64_t mask;
apr_array_header_t *allow = apr_array_make(r->pool, 10, sizeof(char *));
apr_hash_index_t *hi = apr_hash_first(r->pool, methods_registry);
core_server_config *conf =
ap_get_module_config(r->server->module_config, &core_module);
mask = r->allowed_methods->method_mask;
for (; hi; hi = apr_hash_next(hi)) {
const void *key;
void *val;
apr_hash_this(hi, &key, NULL, &val);
if ((mask & (AP_METHOD_BIT << *(int *)val)) != 0) {
*(const char **)apr_array_push(allow) = key;
if (*(int *)val == M_GET)
*(const char **)apr_array_push(allow) = "HEAD";
}
}
if (conf->trace_enable != AP_TRACE_DISABLE)
*(const char **)apr_array_push(allow) = "TRACE";
list = apr_array_pstrcat(r->pool, allow, ',');
if ((mask & (AP_METHOD_BIT << M_INVALID))
&& (r->allowed_methods->method_list != NULL)
&& (r->allowed_methods->method_list->nelts != 0)) {
int i;
char **xmethod = (char **) r->allowed_methods->method_list->elts;
for (i = 0; i < r->allowed_methods->method_list->nelts; ++i) {
list = apr_pstrcat(r->pool, list, ",", xmethod[i], NULL);
}
}
return list;
}
AP_DECLARE(int) ap_send_http_options(request_rec *r)
{
if (r->assbackwards) {
return DECLINED;
}
apr_table_setn(r->headers_out, "Allow", make_allow(r));
return OK;
}
AP_DECLARE(void) ap_set_content_type(request_rec *r, const char *ct)
{
if (!ct) {
r->content_type = NULL;
}
else if (!r->content_type || strcmp(r->content_type, ct)) {
r->content_type = ct;
ap_add_output_filters_by_type(r);
}
}
AP_DECLARE(void) ap_set_accept_ranges(request_rec *r)
{
core_dir_config *d = ap_get_module_config(r->per_dir_config, &core_module);
apr_table_setn(r->headers_out, "Accept-Ranges",
(d->max_ranges == AP_MAXRANGES_NORANGES) ? "none"
: "bytes");
}
static const char *add_optional_notes(request_rec *r,
const char *prefix,
const char *key,
const char *suffix)
{
const char *notes, *result;
if ((notes = apr_table_get(r->notes, key)) == NULL) {
result = apr_pstrcat(r->pool, prefix, suffix, NULL);
}
else {
result = apr_pstrcat(r->pool, prefix, notes, suffix, NULL);
}
return result;
}
static const char *get_canned_error_string(int status,
request_rec *r,
const char *location)
{
apr_pool_t *p = r->pool;
const char *error_notes, *h1, *s1;
switch (status) {
case HTTP_MOVED_PERMANENTLY:
case HTTP_MOVED_TEMPORARILY:
case HTTP_TEMPORARY_REDIRECT:
return(apr_pstrcat(p,
"<p>The document has moved <a href=\"",
ap_escape_html(r->pool, location),
"\">here</a>.</p>\n",
NULL));
case HTTP_SEE_OTHER:
return(apr_pstrcat(p,
"<p>The answer to your request is located "
"<a href=\"",
ap_escape_html(r->pool, location),
"\">here</a>.</p>\n",
NULL));
case HTTP_USE_PROXY:
return(apr_pstrcat(p,
"<p>This resource is only accessible "
"through the proxy\n",
ap_escape_html(r->pool, location),
"<br />\nYou will need to configure "
"your client to use that proxy.</p>\n",
NULL));
case HTTP_PROXY_AUTHENTICATION_REQUIRED:
case HTTP_UNAUTHORIZED:
return("<p>This server could not verify that you\n"
"are authorized to access the document\n"
"requested. Either you supplied the wrong\n"
"credentials (e.g., bad password), or your\n"
"browser doesn't understand how to supply\n"
"the credentials required.</p>\n");
case HTTP_BAD_REQUEST:
return(add_optional_notes(r,
"<p>Your browser sent a request that "
"this server could not understand.<br />\n",
"error-notes",
"</p>\n"));
case HTTP_FORBIDDEN:
return(apr_pstrcat(p,
"<p>You don't have permission to access ",
ap_escape_html(r->pool, r->uri),
"\non this server.</p>\n",
NULL));
case HTTP_NOT_FOUND:
return(apr_pstrcat(p,
"<p>The requested URL ",
ap_escape_html(r->pool, r->uri),
" was not found on this server.</p>\n",
NULL));
case HTTP_METHOD_NOT_ALLOWED:
return(apr_pstrcat(p,
"<p>The requested method ",
ap_escape_html(r->pool, r->method),
" is not allowed for the URL ",
ap_escape_html(r->pool, r->uri),
".</p>\n",
NULL));
case HTTP_NOT_ACCEPTABLE:
s1 = apr_pstrcat(p,
"<p>An appropriate representation of the "
"requested resource ",
ap_escape_html(r->pool, r->uri),
" could not be found on this server.</p>\n",
NULL);
return(add_optional_notes(r, s1, "variant-list", ""));
case HTTP_MULTIPLE_CHOICES:
return(add_optional_notes(r, "", "variant-list", ""));
case HTTP_LENGTH_REQUIRED:
s1 = apr_pstrcat(p,
"<p>A request of the requested method ",
ap_escape_html(r->pool, r->method),
" requires a valid Content-length.<br />\n",
NULL);
return(add_optional_notes(r, s1, "error-notes", "</p>\n"));
case HTTP_PRECONDITION_FAILED:
return(apr_pstrcat(p,
"<p>The precondition on the request "
"for the URL ",
ap_escape_html(r->pool, r->uri),
" evaluated to false.</p>\n",
NULL));
case HTTP_NOT_IMPLEMENTED:
s1 = apr_pstrcat(p,
"<p>",
ap_escape_html(r->pool, r->method), " to ",
ap_escape_html(r->pool, r->uri),
" not supported.<br />\n",
NULL);
return(add_optional_notes(r, s1, "error-notes", "</p>\n"));
case HTTP_BAD_GATEWAY:
s1 = "<p>The proxy server received an invalid" CRLF
"response from an upstream server.<br />" CRLF;
return(add_optional_notes(r, s1, "error-notes", "</p>\n"));
case HTTP_VARIANT_ALSO_VARIES:
return(apr_pstrcat(p,
"<p>A variant for the requested "
"resource\n<pre>\n",
ap_escape_html(r->pool, r->uri),
"\n</pre>\nis itself a negotiable resource. "
"This indicates a configuration error.</p>\n",
NULL));
case HTTP_REQUEST_TIME_OUT:
return("<p>Server timeout waiting for the HTTP request from the client.</p>\n");
case HTTP_GONE:
return(apr_pstrcat(p,
"<p>The requested resource<br />",
ap_escape_html(r->pool, r->uri),
"<br />\nis no longer available on this server "
"and there is no forwarding address.\n"
"Please remove all references to this "
"resource.</p>\n",
NULL));
case HTTP_REQUEST_ENTITY_TOO_LARGE:
return(apr_pstrcat(p,
"The requested resource<br />",
ap_escape_html(r->pool, r->uri), "<br />\n",
"does not allow request data with ",
ap_escape_html(r->pool, r->method),
" requests, or the amount of data provided in\n"
"the request exceeds the capacity limit.\n",
NULL));
case HTTP_REQUEST_URI_TOO_LARGE:
s1 = "<p>The requested URL's length exceeds the capacity\n"
"limit for this server.<br />\n";
return(add_optional_notes(r, s1, "error-notes", "</p>\n"));
case HTTP_UNSUPPORTED_MEDIA_TYPE:
return("<p>The supplied request data is not in a format\n"
"acceptable for processing by this resource.</p>\n");
case HTTP_RANGE_NOT_SATISFIABLE:
return("<p>None of the range-specifier values in the Range\n"
"request-header field overlap the current extent\n"
"of the selected resource.</p>\n");
case HTTP_EXPECTATION_FAILED:
s1 = apr_table_get(r->headers_in, "Expect");
if (s1)
s1 = apr_pstrcat(p,
"<p>The expectation given in the Expect request-header\n"
"field could not be met by this server.\n"
"The client sent<pre>\n Expect: ",
ap_escape_html(r->pool, s1), "\n</pre>\n",
NULL);
else
s1 = "<p>No expectation was seen, the Expect request-header \n"
"field was not presented by the client.\n";
return add_optional_notes(r, s1, "error-notes", "</p>"
"<p>Only the 100-continue expectation is supported.</p>\n");
case HTTP_UNPROCESSABLE_ENTITY:
return("<p>The server understands the media type of the\n"
"request entity, but was unable to process the\n"
"contained instructions.</p>\n");
case HTTP_LOCKED:
return("<p>The requested resource is currently locked.\n"
"The lock must be released or proper identification\n"
"given before the method can be applied.</p>\n");
case HTTP_FAILED_DEPENDENCY:
return("<p>The method could not be performed on the resource\n"
"because the requested action depended on another\n"
"action and that other action failed.</p>\n");
case HTTP_UPGRADE_REQUIRED:
return("<p>The requested resource can only be retrieved\n"
"using SSL. The server is willing to upgrade the current\n"
"connection to SSL, but your client doesn't support it.\n"
"Either upgrade your client, or try requesting the page\n"
"using https://\n");
case HTTP_INSUFFICIENT_STORAGE:
return("<p>The method could not be performed on the resource\n"
"because the server is unable to store the\n"
"representation needed to successfully complete the\n"
"request. There is insufficient free space left in\n"
"your storage allocation.</p>\n");
case HTTP_SERVICE_UNAVAILABLE:
return("<p>The server is temporarily unable to service your\n"
"request due to maintenance downtime or capacity\n"
"problems. Please try again later.</p>\n");
case HTTP_GATEWAY_TIME_OUT:
return("<p>The gateway did not receive a timely response\n"
"from the upstream server or application.</p>\n");
case HTTP_NOT_EXTENDED:
return("<p>A mandatory extension policy in the request is not\n"
"accepted by the server for this resource.</p>\n");
default:
if (((error_notes = apr_table_get(r->notes,
"error-notes")) != NULL)
&& (h1 = apr_table_get(r->notes, "verbose-error-to")) != NULL
&& (strcmp(h1, "*") == 0)) {
return(apr_pstrcat(p, error_notes, "<p />\n", NULL));
}
else {
return(apr_pstrcat(p,
"<p>The server encountered an internal "
"error or\n"
"misconfiguration and was unable to complete\n"
"your request.</p>\n"
"<p>Please contact the server "
"administrator,\n ",
ap_escape_html(r->pool,
r->server->server_admin),
" and inform them of the time the "
"error occurred,\n"
"and anything you might have done that "
"may have\n"
"caused the error.</p>\n"
"<p>More information about this error "
"may be available\n"
"in the server error log.</p>\n",
NULL));
}
}
}
AP_DECLARE(void) ap_send_error_response(request_rec *r, int recursive_error)
{
int status = r->status;
int idx = ap_index_of_response(status);
char *custom_response;
const char *location = apr_table_get(r->headers_out, "Location");
r->eos_sent = 0;
r->output_filters = r->proto_output_filters;
ap_run_insert_error_filter(r);
if (location == NULL) {
location = apr_table_get(r->err_headers_out, "Location");
}
if (status == HTTP_NOT_MODIFIED) {
ap_finalize_request_protocol(r);
return;
}
if (status == HTTP_NO_CONTENT) {
ap_finalize_request_protocol(r);
return;
}
if (!r->assbackwards) {
apr_table_t *tmp = r->headers_out;
r->headers_out = r->err_headers_out;
r->err_headers_out = tmp;
apr_table_clear(r->err_headers_out);
if (ap_is_HTTP_REDIRECT(status) || (status == HTTP_CREATED)) {
if ((location != NULL) && *location) {
apr_table_setn(r->headers_out, "Location", location);
}
else {
location = "";
}
}
r->content_languages = NULL;
r->content_encoding = NULL;
r->clength = 0;
if (apr_table_get(r->subprocess_env,
"suppress-error-charset") != NULL) {
core_request_config *request_conf =
ap_get_module_config(r->request_config, &core_module);
request_conf->suppress_charset = 1;
ap_set_content_type(r, "text/html");
}
else {
ap_set_content_type(r, "text/html; charset=iso-8859-1");
}
if ((status == HTTP_METHOD_NOT_ALLOWED)
|| (status == HTTP_NOT_IMPLEMENTED)) {
apr_table_setn(r->headers_out, "Allow", make_allow(r));
}
if (r->header_only) {
ap_finalize_request_protocol(r);
return;
}
}
if ((custom_response = ap_response_code_string(r, idx))) {
if (custom_response[0] == '\"') {
ap_rputs(custom_response + 1, r);
ap_finalize_request_protocol(r);
return;
}
}
{
const char *title = status_lines[idx];
const char *h1;
if (r->status_line != NULL
&& strlen(r->status_line) > 4
&& apr_isdigit(r->status_line[0])
&& apr_isdigit(r->status_line[1])
&& apr_isdigit(r->status_line[2])
&& apr_isspace(r->status_line[3])
&& apr_isalnum(r->status_line[4])) {
title = r->status_line;
}
h1 = &title[4];
ap_rvputs_proto_in_ascii(r,
DOCTYPE_HTML_2_0
"<html><head>\n<title>", title,
"</title>\n</head><body>\n<h1>", h1, "</h1>\n",
NULL);
ap_rvputs_proto_in_ascii(r,
get_canned_error_string(status, r, location),
NULL);
if (recursive_error) {
ap_rvputs_proto_in_ascii(r, "<p>Additionally, a ",
status_lines[ap_index_of_response(recursive_error)],
"\nerror was encountered while trying to use an "
"ErrorDocument to handle the request.</p>\n", NULL);
}
ap_rvputs_proto_in_ascii(r, ap_psignature("<hr>\n", r), NULL);
ap_rvputs_proto_in_ascii(r, "</body></html>\n", NULL);
}
ap_finalize_request_protocol(r);
}
AP_DECLARE(ap_method_list_t *) ap_make_method_list(apr_pool_t *p, int nelts)
{
ap_method_list_t *ml;
ml = (ap_method_list_t *) apr_palloc(p, sizeof(ap_method_list_t));
ml->method_mask = 0;
ml->method_list = apr_array_make(p, nelts, sizeof(char *));
return ml;
}
AP_DECLARE(void) ap_copy_method_list(ap_method_list_t *dest,
ap_method_list_t *src)
{
int i;
char **imethods;
char **omethods;
dest->method_mask = src->method_mask;
imethods = (char **) src->method_list->elts;
for (i = 0; i < src->method_list->nelts; ++i) {
omethods = (char **) apr_array_push(dest->method_list);
*omethods = apr_pstrdup(dest->method_list->pool, imethods[i]);
}
}
AP_DECLARE(int) ap_method_in_list(ap_method_list_t *l, const char *method)
{
int methnum;
int i;
char **methods;
methnum = ap_method_number_of(method);
if (methnum != M_INVALID) {
return !!(l->method_mask & (AP_METHOD_BIT << methnum));
}
if ((l->method_list == NULL) || (l->method_list->nelts == 0)) {
return 0;
}
methods = (char **)l->method_list->elts;
for (i = 0; i < l->method_list->nelts; ++i) {
if (strcmp(method, methods[i]) == 0) {
return 1;
}
}
return 0;
}
AP_DECLARE(void) ap_method_list_add(ap_method_list_t *l, const char *method)
{
int methnum;
int i;
const char **xmethod;
char **methods;
methnum = ap_method_number_of(method);
l->method_mask |= (AP_METHOD_BIT << methnum);
if (methnum != M_INVALID) {
return;
}
if (l->method_list->nelts != 0) {
methods = (char **)l->method_list->elts;
for (i = 0; i < l->method_list->nelts; ++i) {
if (strcmp(method, methods[i]) == 0) {
return;
}
}
}
xmethod = (const char **) apr_array_push(l->method_list);
*xmethod = method;
}
AP_DECLARE(void) ap_method_list_remove(ap_method_list_t *l,
const char *method)
{
int methnum;
char **methods;
methnum = ap_method_number_of(method);
l->method_mask |= ~(AP_METHOD_BIT << methnum);
if (methnum != M_INVALID) {
return;
}
if (l->method_list->nelts != 0) {
register int i, j, k;
methods = (char **)l->method_list->elts;
for (i = 0; i < l->method_list->nelts; ) {
if (strcmp(method, methods[i]) == 0) {
for (j = i, k = i + 1; k < l->method_list->nelts; ++j, ++k) {
methods[j] = methods[k];
}
--l->method_list->nelts;
}
else {
++i;
}
}
}
}
AP_DECLARE(void) ap_clear_method_list(ap_method_list_t *l)
{
l->method_mask = 0;
l->method_list->nelts = 0;
}