Mailing List Archive

Saw this on USENET; note that the fellow has a lot of interesting
plans. Perhaps we should invite him in?

rst

From: borud@itea.unit.no (Bjxrn Borud)
Newsgroups: no.www,comp.infosystems.www.providers,comp.infosystems.www
Subject: NCSA compliant cgi env. patch (Re: NCSA httpd 1.3 referer hack)
Message-ID: <BORUD.95Mar28124836@istind.itea.unit.no>

[Carlos A. Pero]
|
|NCSA httpd 1.4 will be released in the next couple of weeks. It is
|currently under beta-testing. It has provisions for HTTP_REFERER
|(referring document) and HTTP_USER_AGENT (which browser), and allows
|logging to a separate file so as not to break the COMMON log file
|format.


Okay, I changed my patch a bit:

o Changed REFERER to HTTP_REFERER for cgi environment.
o Added HTTP_USER_AGENT for cgi environment.

Now you'll be able to do scripts that are compatible with 1.4 before
1.4 hits the sites. Whee. Thought about adding logging to a separate
file so I can log user-agent too, but I don't have the time to do that
properly; se below...
Oh BTW. This patch still logs the "Referer:" field to the access_log.


Stuff I'm CONSIDERING to do:

o source file selection based on user-agent type, host
address etc. (So people who have HTML 3.0 compliant clients
get HTML 3.0 docs if available etc).

o config file so users can assign mime types to speciffic files
regardless of suffix. (yes, it'll be ugly and slow, but I would
like to have the option to do so)

o integration of the imagemap program into httpd.

o Custom logging where you define the path of the logfile
and what fields go where in the config files.

...and a few other things that didn't pop to mind as I wrote this.


This patch replaces the previous patch. Compile the server with
-DBORUD_HACKS. Feel free to mail me if you actually use the patch...

WARNING: this patch might break something so you add it at your
own risk.

------------------8<---------------------------------------------

*** 1.1 1995/03/27 11:01:32
--- http_mime.c 1995/03/28 10:18:49
***************
*** 28,33 ****
--- 28,37 ----
int content_length;
char content_type[MAX_STRING_LEN];
char content_encoding[MAX_STRING_LEN];
+ #ifdef BORUD_HACKS
+ char the_referer[MAX_STRING_LEN];
+ char the_user_agent[MAX_STRING_LEN];
+ #endif

char location[MAX_STRING_LEN];
static char last_modified[MAX_STRING_LEN];
***************
*** 332,337 ****
--- 336,345 ----
status_line = NULL;
out_headers = NULL;
in_headers_env = NULL;
+ #ifdef BORUD_HACKS
+ the_referer[0] = '\0';
+ the_user_agent[0] = '\0';
+ #endif
}

int merge_header(char *h, char *v, FILE *out) {
***************
*** 376,381 ****
--- 384,403 ----
*t++ = '\0';
while(isspace(*t)) ++t;
strcpy(l,t);
+
+ #ifdef BORUD_HACKS
+
+ if(!strcasecmp(w,"Referer")) {
+ strcpy(the_referer,l);
+ continue;
+ }
+
+ if(!strcasecmp(w,"User-Agent")) {
+ strcpy(the_user_agent,l);
+ continue;
+ }
+
+ #endif

if(!strcasecmp(w,"Content-type")) {
strcpy(content_type,l);
*** 1.1 1995/03/27 11:00:45
--- http_log.c 1995/03/28 10:07:45
***************
*** 89,94 ****
--- 89,102 ----
sprintf(str,"%s%d",str,bytes_sent);
else
strcat(str,"- ");
+
+ #ifdef BORUD_HACKS
+
+ /* Let's break dumb log-analyzers, huh? */
+
+ sprintf(str,"%s [%s]",str,(the_referer[0] ? the_referer : "none"));
+ #endif
+
fprintf(xfer_log,"%s\n",str);
fclose(xfer_log);
}
*** 1.1 1995/03/27 12:00:24
--- http_script.c 1995/03/28 10:26:47
***************
*** 5,10 ****
--- 5,14 ----
*
* Rob McCool
*
+ * (Additional hacks by B. Borud)
+ *
+ * $Id: http_script.c,v 1.2 1995/03/27 13:32:53 borud Exp borud $
+ *
*/

#include "httpd.h"
***************
*** 109,114 ****
--- 113,128 ----
env[x++] = make_env_str("PATH_TRANSLATED",t2,out);
}
env[x++] = make_env_str("QUERY_STRING",args,out);
+
+ #ifdef BORUD_HACKS
+
+ /* NCSA are adding these in the next version..*/
+ /* ..which is due Real Soon Now */
+
+ env[x++] = make_env_str("HTTP_REFERER",the_referer,out);
+ env[x++] = make_env_str("HTTP_USER_AGENT",the_user_agent,out);
+
+ #endif

if(content) {
*content=0;
*** 1.1 1995/03/27 13:04:52
--- httpd.h 1995/03/28 10:06:06
***************
*** 458,463 ****
--- 458,467 ----
extern char content_type[MAX_STRING_LEN];
extern char content_encoding[MAX_STRING_LEN];
extern char location[MAX_STRING_LEN];
+ #ifdef BORUD_HACKS
+ extern char the_referer[MAX_STRING_LEN];
+ extern char the_user_agent[MAX_STRING_LEN];
+ #endif
extern char **in_headers_env;

/* http_log */

------------------8<---------------------------------------------

-Bjorn

--
__________________________________________________________
## Bjorn Borud ## mail: Bjorn.Borud@alkymi.unit.no ##
## PVV/NVG/ITEA ## WWW : http://www.pvv.unit.no/~borud/ ##
## Ozelot@IRC ## PGP : finger ozelot@irc.nvg.unit.no ##