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-
- /* ====================================================================
- * Copyright (c) 1995, 1996 The Apache Group. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the Apache Group
- * for use in the Apache HTTP server project (http://www.apache.org/)."
- *
- * 4. The names "Apache Server" and "Apache Group" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission.
- *
- * 5. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the Apache Group
- * for use in the Apache HTTP server project (http://www.apache.org/)."
- *
- * THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Group and was originally based
- * on public domain software written at the National Center for
- * Supercomputing Applications, University of Illinois, Urbana-Champaign.
- * For more information on the Apache Group and the Apache HTTP server
- * project, please see <http://www.apache.org/>.
- *
- */
-
-
- /* User Tracking Module
- *
- * This Apache module is designed to track users paths through a site.
- * It uses the client-side state ("Cookie") protocol developed by Netscape.
- * It is known to work on Netscape browsers, Microsoft Internet
- * Explorer and others currently being developed.
- *
- * Each time a page is requested we look to see if the browser is sending
- * us a Cookie: header that we previously generated.
- *
- * If we don't find one then the user hasn't been to this site since
- * starting their browser or their browser doesn't support cookies. So
- * we generate a unique Cookie for the transaction and send it back to
- * the browser (via a "Set-Cookie" header)
- * Future requests from the same browser should keep the same Cookie line.
- *
- * The cookie and request are logged to a file. Use the directive
- * "CookieLog somefilename" in one of the config files to enable the Cookie
- * module. By matching up all the requests with the same cookie you can
- * work out exactly what path a user took through your site.
- *
- * Notes:
- * 1. This code doesn't log the initial transaction (the one that created
- * the cookie to start with). If it did then the cookie log file would
- * be bigger than a normal access log.
- * 2. This module has been designed to not interfere with other Cookies
- * your site may be using; just avoid sending out cookies with
- * the name "Apache=" or things will get confused.
- * 3. If you want you can modify the Set-Cookie line so that the Cookie
- * never expires. You would then get the same Cookie each time the
- * user revisits your site.
- *
- * Mark Cox, mark@ukweb.com, http://www.ukweb.com/~mark/, 6 July 95
- *
- * 6.12.95 MJC Now be more friendly. Allow our cookies to overlap with
- * others the site may be using. Use a more descriptive
- * cookie name.
- * 18.3.96 MJC Generate cookies for EVERY request no matter what the
- * browser. We never know when a new browser writer will
- * add cookie support.
- * 31.3.95 JimC Allow the log to be sent to a pipe. Copies the relevant
- * code from mod_log_agent.c.
- * 24.5.96 MJC Improved documentation after receiving comments from users
- * 4.7.96 MJC Bug, "else" missing since February caused logging twice
- */
-
- #include "httpd.h"
- #include "http_config.h"
- #include "http_core.h"
- #include <sys/time.h>
-
- module cookies_module;
-
- typedef struct {
- char *fname;
- int log_fd;
- int always;
- } cookie_log_state;
-
- /* Make Cookie: Now we have to generate something that is going to be
- * pretty unique. We can base it on the pid, time, hostip */
-
- #define COOKIE_NAME "Apache="
-
- void make_cookie(request_rec *r)
- {
- struct timeval tv;
- char new_cookie[100]; /* blurgh */
- char *dot;
- const char *rname = pstrdup(r->pool,
- get_remote_host(r->connection, r->per_dir_config,
- REMOTE_NAME));
-
- struct timezone tz = { 0 , 0 };
-
- if ((dot = strchr(rname,'.'))) *dot='\0'; /* First bit of hostname */
- gettimeofday(&tv, &tz);
- sprintf(new_cookie,"%s%s%d%ld%d; path=/",
- COOKIE_NAME, rname,
- (int)getpid(),
- (long)tv.tv_sec, (int)tv.tv_usec/1000 );
-
- table_set(r->headers_out,"Set-Cookie",new_cookie);
- return;
- }
-
- int spot_cookie(request_rec *r)
- {
- char *cookie;
-
- if ((cookie = table_get (r->headers_in, "Cookie")))
- if (strstr(cookie,COOKIE_NAME))
- return DECLINED; /* Theres already a cookie, no new one */
- make_cookie(r);
- return OK; /* We set our cookie */
- }
-
- static int cookie_flags = ( O_WRONLY | O_APPEND | O_CREAT );
-
- #ifdef __EMX__
- /* OS/2 lacks support for users and groups */
- static mode_t cookie_mode = ( S_IREAD | S_IWRITE );
- #else
- static mode_t cookie_mode = ( S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH );
- #endif
-
- void *make_cookie_log_state (pool *p, server_rec *s)
- {
- cookie_log_state *cls =
- (cookie_log_state *)palloc (p, sizeof (cookie_log_state));
-
- cls->fname = "";
- cls->log_fd = -1;
-
- return (void *)cls;
- }
-
- char *set_cookie_log (cmd_parms *parms, void *dummy, char *arg)
- {
- cookie_log_state *cls = get_module_config (parms->server->module_config,
- &cookies_module);
- cls->fname = arg;
- return NULL;
- }
-
- command_rec cookie_log_cmds[] = {
- { "CookieLog", set_cookie_log, NULL, RSRC_CONF, TAKE1,
- "the filename of the cookie log" },
- { NULL }
- };
-
- void cookie_log_child (void *cmd)
- {
- /* Child process code for 'CookieLog "|..."';
- * may want a common framework for this, since I expect it will
- * be common for other foo-loggers to want this sort of thing...
- */
-
- cleanup_for_exec();
- signal (SIGHUP, SIG_IGN);
- execl (SHELL_PATH, SHELL_PATH, "-c", (char *)cmd, NULL);
- exit (1);
- }
-
- void open_cookie_log (server_rec *s, pool *p)
- {
- cookie_log_state *cls = get_module_config (s->module_config,
- &cookies_module);
- char *fname = server_root_relative (p, cls->fname);
-
- if (cls->log_fd > 0) return;
-
- if (*cls->fname == '|') {
- FILE *dummy;
-
- spawn_child(p, cookie_log_child, (void *)(cls->fname+1),
- kill_after_timeout, &dummy, NULL);
-
- if (dummy == NULL) {
- fprintf (stderr, "Couldn't fork child for CookieLog process\n");
- exit (1);
- }
-
- cls->log_fd = fileno (dummy);
- }
- else if(*cls->fname != '\0') {
- if((cls->log_fd = popenf(p, fname, cookie_flags, cookie_mode)) < 0) {
- fprintf(stderr, "httpd: could not open cookie log file %s.\n", fname);
- perror("open");
- exit(1);
- }
- }
- }
-
- void init_cookie_log (server_rec *s, pool *p)
- {
- for (; s; s = s->next) open_cookie_log (s, p);
- }
-
- int cookie_log_transaction(request_rec *orig)
- {
- cookie_log_state *cls = get_module_config (orig->server->module_config,
- &cookies_module);
- char *str;
- long timz;
- struct tm *t;
- char tstr[MAX_STRING_LEN],sign;
- request_rec *r;
- char *cookie,*cookiebuf,*cookieend;
- char *value;
-
- for (r = orig; r->next; r = r->next)
- continue;
- if (*cls->fname == '\0') /* Don't log cookies */
- return DECLINED;
-
- if (!(cookie = table_get (r->headers_in, "Cookie")))
- return DECLINED; /* Theres no cookie, don't bother logging */
- value=strstr(cookie,COOKIE_NAME);
- if (!value) /* Only log cookies we generated! */
- return DECLINED;
- value+=strlen(COOKIE_NAME);
- cookiebuf=pstrdup( r->pool, value );
- cookieend=strchr(cookiebuf,';');
- if (cookieend) *cookieend='\0'; /* Ignore anything after a ; */
-
- t = get_gmtoff(&timz);
- sign = (timz < 0 ? '-' : '+');
- if(timz < 0)
- timz = -timz;
-
- strftime(tstr,MAX_STRING_LEN,"\" [%d/%b/%Y:%H:%M:%S ",t);
- if (r->status != -1)
- sprintf(&tstr[strlen(tstr)], "%c%02ld%02ld] %d\n", sign, timz/3600,
- timz%3600, r->status);
- else
- sprintf(&tstr[strlen(tstr)], "%c%02ld%02ld] -\n", sign, timz/3600,
- timz%3600);
-
- str = pstrcat(orig->pool, cookiebuf, " \"", orig->the_request, tstr, NULL);
-
- write(cls->log_fd, str, strlen(str));
-
- return OK;
- }
-
-
- module cookies_module = {
- STANDARD_MODULE_STUFF,
- init_cookie_log, /* initializer */
- NULL, /* dir config creater */
- NULL, /* dir merger --- default is to override */
- make_cookie_log_state, /* server config */
- NULL, /* merge server configs */
- cookie_log_cmds, /* command table */
- NULL, /* handlers */
- NULL, /* filename translation */
- NULL, /* check_user_id */
- NULL, /* check auth */
- NULL, /* check access */
- NULL, /* type_checker */
- spot_cookie, /* fixups */
- cookie_log_transaction, /* logger */
- };
-