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Change conn_rec->keepalive to an enumerated value of

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AP_CONN_UNKNOWN
AP_CONN_CLOSE
AP_CONN_KEEPALIVE

This also fixes a problem where ap_discard_request_body would not discard
the body when keepalive was 0.  This actually meant the keepalive status
was unknown *not* closed, but no one ever remembered that.

This problem was seen with mod_dav sending error responses (as reported by
Karl Fogel).

Suggested by:	Greg "this isn't the '80s" Stein
Reviewed by:	Greg Ames


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@95891 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Justin Erenkrantz
2002-06-26 19:45:07 +00:00
parent b76b71d612
commit 001b387bcd
11 changed files with 35 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
CHANGES
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@@ -1,5 +1,8 @@
Changes with Apache 2.0.40
*) Switch conn_rec->keepalive to an enumeration rather than a bitfield.
[Justin Erenkrantz]
*) Fix mod_ext_filter to look in the main server for filter definitions
when running in a vhost if the filter definition is not found in
the vhost. PR 10147 [Jeff Trawick]

5
include/ap_mmn.h
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@@ -108,14 +108,15 @@
* 20020529 (2.0.37-dev) Standardized the names of some apr_pool_*_set funcs
* 20020602 (2.0.37-dev) Bucket API change (metadata buckets)
* 20020612 (2.0.38-dev) Changed server_rec->[keep_alive_]timeout to apr time
* 20020625 (2.0.40-dev) Changed conn_rec->keepalive to an enumeration
*/
#define MODULE_MAGIC_COOKIE 0x41503230UL /* "AP20" */
#ifndef MODULE_MAGIC_NUMBER_MAJOR
#define MODULE_MAGIC_NUMBER_MAJOR 20020612
#define MODULE_MAGIC_NUMBER_MAJOR 20020625
#endif
#define MODULE_MAGIC_NUMBER_MINOR 1 /* 0...n */
#define MODULE_MAGIC_NUMBER_MINOR 0 /* 0...n */
/**
* Determine if the server's current MODULE_MAGIC_NUMBER is at least a

9
include/httpd.h
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@@ -951,6 +951,11 @@ struct request_rec {
/* @} */
typedef enum {
AP_CONN_UNKNOWN,
AP_CONN_CLOSE,
AP_CONN_KEEPALIVE
} ap_conn_keepalive_e;
/** Structure to store things which are per connection */
struct conn_rec {
@@ -981,8 +986,8 @@ struct conn_rec {
unsigned aborted:1;
/** Are we going to keep the connection alive for another request?
* -1 fatal error, 0 undecided, 1 yes */
signed int keepalive:2;
* @see ap_conn_keepalive_e */
ap_conn_keepalive_e keepalive;
/** have we done double-reverse DNS? -1 yes/failure, 0 not yet,
* 1 yes/success */

2
modules/arch/win32/mod_isapi.c
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@@ -1093,7 +1093,7 @@ int APR_THREAD_FUNC ServerSupportFunction(isapi_cid *cid,
return 0;
case HSE_REQ_IS_KEEP_CONN:
*((int *)buf_data) = (r->connection->keepalive == 1);
*((int *)buf_data) = (r->connection->keepalive == AP_CONN_KEEPALIVE);
return 1;
case HSE_REQ_ASYNC_READ_CLIENT:

4
modules/http/http_core.c
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@@ -283,7 +283,7 @@ static int ap_process_http_connection(conn_rec *c)
ap_update_child_status(c->sbh, SERVER_BUSY_READ, NULL);
while ((r = ap_read_request(c)) != NULL) {
c->keepalive = 0;
c->keepalive = AP_CONN_UNKNOWN;
/* process the request if it was read without error */
ap_update_child_status(c->sbh, SERVER_BUSY_WRITE, r);
@@ -293,7 +293,7 @@ static int ap_process_http_connection(conn_rec *c)
if (ap_extended_status)
ap_increment_counts(c->sbh, r);
if (!c->keepalive || c->aborted)
if (c->keepalive != AP_CONN_KEEPALIVE || c->aborted)
break;
ap_update_child_status(c->sbh, SERVER_BUSY_KEEPALIVE, r);

14
modules/http/http_protocol.c
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@@ -223,7 +223,7 @@ AP_DECLARE(int) ap_set_keepalive(request_rec *r)
*
* Note that the condition evaluation order is extremely important.
*/
if ((r->connection->keepalive != -1)
if ((r->connection->keepalive != AP_CONN_CLOSE)
&& ((r->status == HTTP_NOT_MODIFIED)
|| (r->status == HTTP_NO_CONTENT)
|| r->header_only
@@ -247,7 +247,7 @@ AP_DECLARE(int) ap_set_keepalive(request_rec *r)
|| (r->proto_num >= HTTP_VERSION(1,1)))) {
int left = r->server->keep_alive_max - r->connection->keepalives;
r->connection->keepalive = 1;
r->connection->keepalive = AP_CONN_KEEPALIVE;
r->connection->keepalives++;
/* If they sent a Keep-Alive token, send one back */
@@ -281,7 +281,7 @@ AP_DECLARE(int) ap_set_keepalive(request_rec *r)
apr_table_mergen(r->headers_out, "Connection", "close");
}
r->connection->keepalive = 0;
r->connection->keepalive = AP_CONN_CLOSE;
return 0;
}
@@ -1162,7 +1162,7 @@ static void basic_http_header_check(request_rec *r,
if (r->proto_num == HTTP_VERSION(1,0)
&& apr_table_get(r->subprocess_env, "force-response-1.0")) {
*protocol = "HTTP/1.0";
r->connection->keepalive = -1;
r->connection->keepalive = AP_CONN_CLOSE;
}
else {
*protocol = AP_SERVER_PROTOCOL;
@@ -1835,7 +1835,7 @@ AP_DECLARE(long) ap_get_client_block(request_rec *r, char *buffer,
/* if we actually fail here, we want to just return and
* stop trying to read data from the client.
*/
r->connection->keepalive = -1;
r->connection->keepalive = AP_CONN_CLOSE;
return -1;
}
@@ -1882,8 +1882,8 @@ AP_DECLARE(int) ap_discard_request_body(request_rec *r)
*
* This function is also a no-op on a subrequest.
*/
if (r->main || !r->connection->keepalive
|| ap_status_drops_connection(r->status)) {
if (r->main || r->connection->keepalive == AP_CONN_CLOSE ||
ap_status_drops_connection(r->status)) {
return OK;
}

4
modules/http/http_request.c
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@@ -143,7 +143,7 @@ AP_DECLARE(void) ap_die(int type, request_rec *r)
* connection, be sure that the request body (if any) has been read.
*/
if (ap_status_drops_connection(r->status)) {
r->connection->keepalive = 0;
r->connection->keepalive = AP_CONN_CLOSE;
}
/*
@@ -216,7 +216,7 @@ static void check_pipeline_flush(request_rec *r)
*/
/* ### shouldn't this read from the connection input filters? */
/* ### is zero correct? that means "read one line" */
if (!r->connection->keepalive ||
if (r->connection->keepalive == AP_CONN_CLOSE ||
ap_get_brigade(r->input_filters, bb, AP_MODE_EATCRLF,
APR_NONBLOCK_READ, 0) != APR_SUCCESS) {
apr_bucket *e = apr_bucket_flush_create(c->bucket_alloc);

2
modules/loggers/mod_log_config.c
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@@ -585,7 +585,7 @@ static const char *log_connection_status(request_rec *r, char *a)
if (r->connection->aborted)
return "X";
if (r->connection->keepalive &&
if (r->connection->keepalive == AP_CONN_KEEPALIVE &&
(!r->server->keep_alive_max ||
(r->server->keep_alive_max - r->connection->keepalives) > 0)) {
return "+";

6
modules/proxy/proxy_http.c
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@@ -446,7 +446,7 @@ apr_status_t ap_proxy_http_request(apr_pool_t *p, request_rec *r,
ap_proxy_clear_connection(p, r->headers_in);
if (p_conn->close) {
apr_table_setn(r->headers_in, "Connection", "close");
origin->keepalive = 0;
origin->keepalive = AP_CONN_CLOSE;
}
if ( apr_table_get(r->subprocess_env,"force-proxy-request-1.0")) {
@@ -456,7 +456,7 @@ apr_status_t ap_proxy_http_request(apr_pool_t *p, request_rec *r,
}
if ( apr_table_get(r->subprocess_env,"proxy-nokeepalive")) {
apr_table_unset(r->headers_in, "Connection");
origin->keepalive = 0;
origin->keepalive = AP_CONN_CLOSE;
}
ap_xlate_proto_to_ascii(buf, strlen(buf));
e = apr_bucket_pool_create(buf, strlen(buf), p, c->bucket_alloc);
@@ -798,7 +798,7 @@ apr_status_t ap_proxy_http_process_response(apr_pool_t * p, request_rec *r,
/* cancel keepalive if HTTP/1.0 or less */
if ((major < 1) || (minor < 1)) {
p_conn->close += 1;
origin->keepalive = 0;
origin->keepalive = AP_CONN_CLOSE;
}
} else {
/* an http/0.9 response */

7
server/core.c
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@@ -3293,7 +3293,7 @@ static int net_time_filter(ap_filter_t *f, apr_bucket_brigade *b,
ap_input_mode_t mode, apr_read_type_e block,
apr_off_t readbytes)
{
int keptalive = f->c->keepalive == 1;
int keptalive = f->c->keepalive == AP_CONN_KEEPALIVE;
apr_socket_t *csd = ap_get_module_config(f->c->conn_config, &core_module);
int *first_line = f->ctx;
@@ -3755,7 +3755,8 @@ static apr_status_t core_output_filter(ap_filter_t *f, apr_bucket_brigade *b)
&& (nbytes + flen < AP_MIN_BYTES_TO_WRITE)
&& !APR_BUCKET_IS_FLUSH(last_e))
|| (nbytes + flen < AP_MIN_BYTES_TO_WRITE
&& APR_BUCKET_IS_EOS(last_e) && c->keepalive)) {
&& APR_BUCKET_IS_EOS(last_e)
&& c->keepalive == AP_CONN_KEEPALIVE)) {
/* NEVER save an EOS in here. If we are saving a brigade with
* an EOS bucket, then we are doing keepalive connections, and
@@ -3824,7 +3825,7 @@ static apr_status_t core_output_filter(ap_filter_t *f, apr_bucket_brigade *b)
}
#if APR_HAS_SENDFILE
if (!c->keepalive && APR_BUCKET_IS_EOS(last_e)) {
if (c->keepalive == AP_CONN_CLOSE && APR_BUCKET_IS_EOS(last_e)) {
/* Prepare the socket to be reused */
flags |= APR_SENDFILE_DISCONNECT_SOCKET;
}

3
server/protocol.c
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@@ -1187,7 +1187,8 @@ AP_CORE_DECLARE_NONSTD(apr_status_t) ap_content_length_filter(ap_filter_t *f,
* We should be able to force connection close from this filter
* when we see we are buffering too much.
*/
if ((r->proto_num >= HTTP_VERSION(1, 1)) || (!r->connection->keepalive)) {
if ((r->proto_num >= HTTP_VERSION(1, 1)) ||
(r->connection->keepalive == AP_CONN_CLOSE)) {
partial_send_okay = 1;
}