Commit 42ac8c18 authored by Ryan Bloom's avatar Ryan Bloom
Browse files

Move the keepalives field out of the conn_rec and into an HTTP specific 

connection record.  This also moves some HTTP specific back out of the
core and into the HTTP module.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@88881 13f79535-47bb-0310-9956-ffa450edef68
parent 3e16e0dc

include/httpd.h

+0 −4
Original line number Diff line number Diff line
@@ -860,14 +860,10 @@ struct conn_rec { 
    unsigned aborted:1;

    /** Are we using HTTP Keep-Alive?  -1 fatal error, 0 undecided, 1 yes */

    signed int keepalive:2;

    /** Did we use HTTP Keep-Alive? */

    unsigned keptalive:1;

    /** have we done double-reverse DNS? -1 yes/failure, 0 not yet, 

     *  1 yes/success */

    signed int double_reverse:2;



    /** How many times have we used it? */

    int keepalives;

    /** server IP address */

    char *local_ip;

    /** used for ap_get_server_name when UseCanonicalName is set to DNS

modules/http/config.m4

+3 −0
Original line number Diff line number Diff line
@@ -7,5 +7,8 @@ http_objects="http_core.lo http_protocol.lo http_request.lo" 
APACHE_MODULE(http, HTTP protocol handling, $http_objects, , yes)

APACHE_MODULE(mime, mapping of file-extension to MIME, , , yes)



if test "$enable_http" = "yes"; then

  AC_DEFINE(AP_HTTP_ENABLED, 1, [HTTP is enabled on this server])

fi



APACHE_MODPATH_FINISH

modules/http/http_core.c

+148 −0
Original line number Diff line number Diff line
@@ -58,6 +58,7 @@ 


#include "apr_strings.h"

#include "apr_thread_proc.h"    /* for RLIMIT stuff */

#include "apr_lib.h"



#define APR_WANT_STRFUNC

#include "apr_want.h"
@@ -65,6 +66,7 @@ 
#define CORE_PRIVATE

#include "httpd.h"

#include "http_config.h"

#include "http_log.h"

#include "http_connection.h"

#include "http_protocol.h"	/* For index_of_response().  Grump. */

#include "http_request.h"
@@ -295,6 +297,151 @@ static int ap_process_http_connection(conn_rec *c) 
    return OK;

}



static int read_request_line(request_rec *r)

{

    char l[DEFAULT_LIMIT_REQUEST_LINE + 2]; /* getline's two extra for \n\0 */

    const char *ll = l;

    const char *uri;

    const char *pro;

 

    int major = 1, minor = 0;   /* Assume HTTP/1.0 if non-"HTTP" protocol */

    int len;

 

    /* 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.

     */

 

    while ((len = ap_getline(l, sizeof(l), r, 0)) <= 0) {

        if (len < 0) {             /* includes EOF */

            /* this is a hack to make sure that request time is set,

             * it's not perfect, but it's better than nothing

             */

            r->request_time = apr_time_now();

            return 0;

        }

    }

    /* we've probably got something to do, ignore graceful restart requests */

 

    /* XXX - sigwait doesn't work if the signal has been SIG_IGNed (under

     * linux 2.0 w/ glibc 2.0, anyway), and this step isn't necessary when

     * we're running a sigwait thread anyway. If/when unthreaded mode is

     * put back in, we should make sure to ignore this signal iff a sigwait

     * thread isn't used. - mvsk

 

#ifdef SIGWINCH

    apr_signal(SIGWINCH, SIG_IGN);

#endif

    */

 

    r->request_time = apr_time_now();

    r->the_request = apr_pstrdup(r->pool, l);

    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);

 

    /* ap_getline returns (size of max buffer - 1) 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 (len > r->server->limit_req_line) {

        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;

    }

 

    if (ll[0]) {

        r->assbackwards = 0;

        pro = ll;

        len = strlen(ll);

    } else {

        r->assbackwards = 1;

        pro = "HTTP/0.9";

        len = 8;

    }

    r->protocol = apr_pstrndup(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 (2 == sscanf(r->protocol, "HTTP/%u.%u", &major, &minor)

               && 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;

}



static int http_create_request(request_rec *r)

{

    ap_http_conn_rec *hconn = ap_get_module_config(r->connection->conn_config, &http_module);

    int keptalive;



    hconn = apr_pcalloc(r->pool, sizeof(*hconn));

    ap_set_module_config(r->connection->conn_config, &http_module, hconn);



    if (!r->main && !r->prev && !r->next) {

        keptalive = r->connection->keepalive == 1;

        r->connection->keepalive    = 0;

 

        /* XXX can we optimize these timeouts at all? gstein */

        apr_setsocketopt(r->connection->client_socket, APR_SO_TIMEOUT,

                         (int)(keptalive

                         ? r->server->keep_alive_timeout * APR_USEC_PER_SEC

                         : r->server->timeout * APR_USEC_PER_SEC));

 

        /* Get the request... */

        if (!read_request_line(r)) {

            if (r->status == HTTP_REQUEST_URI_TOO_LARGE) {

                ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, 0, r,

                              "request failed: URI too long");

                ap_send_error_response(r, 0);

                ap_run_log_transaction(r);

                return OK;

            }

            return DONE;

        }

        if (keptalive) {

            apr_setsocketopt(r->connection->client_socket,

                             APR_SO_TIMEOUT,

                             (int)(r->server->timeout * APR_USEC_PER_SEC));

        }

    }

    return OK;

}



static void register_hooks(apr_pool_t *p)

{

    ap_hook_pre_connection(ap_pre_http_connection,NULL,NULL,
@@ -303,6 +450,7 @@ static void register_hooks(apr_pool_t *p) 
			       APR_HOOK_REALLY_LAST);

    ap_hook_http_method(http_method,NULL,NULL,APR_HOOK_REALLY_LAST);

    ap_hook_default_port(http_port,NULL,NULL,APR_HOOK_REALLY_LAST);

    ap_hook_create_request(http_create_request, NULL, NULL, APR_HOOK_MIDDLE);



    ap_register_input_filter("HTTP_IN", ap_http_filter, AP_FTYPE_CONNECTION);

    ap_register_input_filter("DECHUNK", ap_dechunk_filter, AP_FTYPE_TRANSCODE);

modules/http/http_protocol.c

+4 −3
Original line number Diff line number Diff line
@@ -105,6 +105,7 @@ AP_DECLARE(int) ap_set_keepalive(request_rec *r) 
    int ka_sent = 0;

    int wimpy = ap_find_token(r->pool,

                           apr_table_get(r->headers_out, "Connection"), "close");

    ap_http_conn_rec *hconn = ap_get_module_config(r->connection->conn_config, &http_module);

    const char *conn = apr_table_get(r->headers_in, "Connection");



    /* The following convoluted conditional determines whether or not
@@ -146,7 +147,7 @@ AP_DECLARE(int) ap_set_keepalive(request_rec *r) 
        && r->server->keep_alive

	&& (r->server->keep_alive_timeout > 0)

	&& ((r->server->keep_alive_max == 0)

	    || (r->server->keep_alive_max > r->connection->keepalives))

	    || (r->server->keep_alive_max > hconn->keepalives))

	&& !ap_status_drops_connection(r->status)

	&& !wimpy

	&& !ap_find_token(r->pool, conn, "close")
@@ -154,10 +155,10 @@ AP_DECLARE(int) ap_set_keepalive(request_rec *r) 
	    || apr_table_get(r->headers_in, "Via"))

	&& ((ka_sent = ap_find_token(r->pool, conn, "keep-alive"))

	    || (r->proto_num >= HTTP_VERSION(1,1)))) {

        int left = r->server->keep_alive_max - r->connection->keepalives;

        int left = r->server->keep_alive_max - hconn->keepalives;



        r->connection->keepalive = 1;

        r->connection->keepalives++;

        hconn->keepalives++;



        /* If they sent a Keep-Alive token, send one back */

        if (ka_sent) {

modules/http/mod_core.h

+9 −0
Original line number Diff line number Diff line
@@ -70,6 +70,13 @@ extern "C" { 
 * @package mod_core private header file

 */



typedef struct ap_http_conn_rec ap_http_conn_rec;



struct ap_http_conn_rec {

    /** How many times have we used it? */

    int keepalives;

};



/*

 * These (input) filters are internal to the mod_core operation.

 */
@@ -92,6 +99,8 @@ AP_DECLARE(void) ap_basic_http_header(request_rec *r, apr_bucket_brigade *bb); 
AP_DECLARE(int) ap_send_http_trace(request_rec *r);

int ap_send_http_options(request_rec *r);



AP_DECLARE_DATA module http_module;



#ifdef __cplusplus

}

#endif