websrvr.c 106 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
/* websrvr.c */

/* Synchronet Web Server */

/* $Id$ */

/****************************************************************************
 * @format.tab-size 4		(Plain Text/Source Code File Header)			*
 * @format.use-tabs true	(see http://www.synchro.net/ptsc_hdr.html)		*
 *																			*
11
 * Copyright 2005 Rob Swindell - http://www.synchro.net/copyright.html		*
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
 *																			*
 * This program is free software; you can redistribute it and/or			*
 * modify it under the terms of the GNU General Public License				*
 * as published by the Free Software Foundation; either version 2			*
 * of the License, or (at your option) any later version.					*
 * See the GNU General Public License for more details: gpl.txt or			*
 * http://www.fsf.org/copyleft/gpl.html										*
 *																			*
 * Anonymous FTP access to the most recent released source is available at	*
 * ftp://vert.synchro.net, ftp://cvs.synchro.net and ftp://ftp.synchro.net	*
 *																			*
 * Anonymous CVS access to the development source and modification history	*
 * is available at cvs.synchro.net:/cvsroot/sbbs, example:					*
 * cvs -d :pserver:anonymous@cvs.synchro.net:/cvsroot/sbbs login			*
 *     (just hit return, no password is necessary)							*
 * cvs -d :pserver:anonymous@cvs.synchro.net:/cvsroot/sbbs checkout src		*
 *																			*
 * For Synchronet coding style and modification guidelines, see				*
 * http://www.synchro.net/source.html										*
 *																			*
 * You are encouraged to submit any modifications (preferably in Unix diff	*
 * format) via e-mail to mods@synchro.net									*
 *																			*
 * Note: If this box doesn't appear square, then you need to fix your tabs.	*
 ****************************************************************************/

38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
/*
 * General notes: (ToDo stuff)
 * strtok() is used a LOT in here... notice that there is a strtok_r() for reentrant...
 * this may imply that strtok() is NOT thread-safe... if in fact it isn't this HAS
 * to be fixed before any real production-level quality is achieved with this web server
 * however, strtok_r() may not be a standard function.
 *
 * RE: not sending the headers if an nph scrpit is detected.  (The headers buffer could
 * just be free()ed and NULLed)
 *
 * Currently, all SSJS requests for a session are ran in the same context without clearing the context in
 * any way.  This behaviour should not be relied on as it may disappear in the future... this will require
 * some thought as it COULD be handy in some circumstances and COULD cause weird bugs in others.
 *
 * Dynamic content is always resent on an If-Modified-Since request... this may not be optimal behaviour
 * for GET requests...
 *
 * Should support RFC2617 Digest auth.
 *
 * Fix up all the logging stuff.
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
 *
 * SSJS stuff could work using three different methods:
 * 1) Temporary file as happens currently
 *		Advantages:
 *			Allows to keep current connection (keep-alive works)
 *			write() doesn't need to be "special"
 *		Disadvantages:
 *			Depends on the temp dir being writable and capable of holding
 *				the full reply
 *			Everything goes throug the disk, so probobly some performance
 *				penalty is involved
 *			No way of sending directly to the remote system
 * 2) nph- style
 *		Advantages:
 *			No file I/O involved
 *			Can do magic tricks (ala my perl web wrapper)
 *		Disadvantages:
 *			Pretty much everything needs to be handled by the script.
 * 3) Return body in http_reply object
 *		All the advantages of 1)
 *		Could use a special write() to make everything just great.
 *		Still doesn't allow page to be sent until fully composed (ie: long
 *			delays)
 * 4) Type three with a callback that sends the header and current body, then
 *		converts write() to send directly to remote.
deuce's avatar
deuce committed
83
84
85
86
 *
 * Add in support to pass connections through to a different webserver...
 *      probobly in access.ars... with like a simplified mod_rewrite.
 *      This would allow people to run apache and Synchronet as the same site.
87
88
 */

deuce's avatar
deuce committed
89
/* Headers for CGI stuff */
90
91
#if defined(__unix__)
	#include <sys/wait.h>		/* waitpid() */
rswindell's avatar
rswindell committed
92
93
	#include <sys/types.h>
	#include <signal.h>			/* kill() */
94
95
#endif

96
#ifndef JAVASCRIPT
97
#define JAVASCRIPT
98
99
#endif

100
#undef SBBS	/* this shouldn't be defined unless building sbbs.dll/libsbbs.so */
101
102
#include "sbbs.h"
#include "sockwrap.h"		/* sendfilesocket() */
103
#include "threadwrap.h"
104
#include "semwrap.h"
105
#include "websrvr.h"
deuce's avatar
deuce committed
106
#include "base64.h"
107

108
109
static const char*	server_name="Synchronet Web Server";
static const char*	newline="\r\n";
110
111
static const char*	http_scheme="http://";
static const size_t	http_scheme_len=7;
112
113
static const char*	error_301="301 Moved Permanently";
static const char*	error_302="302 Moved Temporarily";
114
115
static const char*	error_404="404 Not Found";
static const char*	error_500="500 Internal Server Error";
116
static const char*	unknown="<unknown>";
117

118
/* Is this not in a header somewhere? */
119
extern const uchar* nular;
rswindell's avatar
rswindell committed
120
121

#define TIMEOUT_THREAD_WAIT		60		/* Seconds */
deuce's avatar
deuce committed
122
123
124
#define MAX_REQUEST_LINE		1024	/* NOT including terminator */
#define MAX_HEADERS_SIZE		16384	/* Maximum total size of all headers 
										   (Including terminator )*/
125
#define MAX_REDIR_LOOPS			20		/* Max. times to follow internal redirects for a single request */
126
#define MAX_POST_LEN			1048576	/* Max size of body for POSTS */
127

128
129
130
enum {
	 CLEANUP_SSJS_TMP_FILE
	,CLEANUP_POST_DATA
131
	,MAX_CLEANUPS
132
};
133

134
135
static scfg_t	scfg;
static BOOL		scfg_reloaded=TRUE;
136
static BOOL		http_logging_thread_running=FALSE;
137
138
static ulong	active_clients=0;
static ulong	sockets=0;
139
static BOOL		terminate_server=FALSE;
140
static BOOL		terminate_http_logging_thread=FALSE;
141
142
143
static uint		thread_count=0;
static SOCKET	server_socket=INVALID_SOCKET;
static char		revision[16];
144
145
static char		root_dir[MAX_PATH+1];
static char		error_dir[MAX_PATH+1];
146
static char		temp_dir[MAX_PATH+1];
147
static char		cgi_dir[MAX_PATH+1];
148
static time_t	uptime=0;
149
static DWORD	served=0;
150
static web_startup_t* startup=NULL;
151
static js_server_props_t js_server_props;
152
153
static str_list_t recycle_semfiles;
static str_list_t shutdown_semfiles;
154

155
156
static named_string_t** mime_types;

157
158
/* Logging stuff */
sem_t	log_sem;
159
link_list_t	log_list;
160
161
162
163
164
165
166
struct log_data {
	char	*hostname;
	char	*ident;
	char	*user;
	char	*request;
	char	*referrer;
	char	*agent;
167
	char	*vhost;
168
169
170
171
172
	int		status;
	unsigned int	size;
	struct tm completed;
};

173
typedef struct  {
174
	int			method;
175
176
177
178
179
180
181
182
	char		virtual_path[MAX_PATH+1];
	char		physical_path[MAX_PATH+1];
	BOOL		parsed_headers;
	BOOL    	expect_go_ahead;
	time_t		if_modified_since;
	BOOL		keep_alive;
	char		ars[256];
	char    	auth[128];				/* UserID:Password */
183
184
	char		host[128];				/* The requested host. (as used for self-referencing URLs) */
	char		vhost[128];				/* The requested host. (virtual host) */
185
	int			send_location;
186
	const char*	mime_type;
187
	str_list_t	headers;
188
	char		status[MAX_REQUEST_LINE+1];
189
190
	char *		post_data;
	size_t		post_len;
191
	int			dynamic;
192
	struct log_data	*ld;
193
	char		request_line[MAX_REQUEST_LINE+1];
194
	BOOL		finished;				/* Done processing request. */
195

196
197
198
	/* CGI parameters */
	char		query_str[MAX_REQUEST_LINE+1];
	char		extra_path_info[MAX_REQUEST_LINE+1];
199
200
	str_list_t	cgi_env;
	str_list_t	dynamic_heads;
201

202
203
	/* Dynamically (sever-side JS) generated HTML parameters */
	FILE*	fp;
204
	char		*cleanup_file[MAX_CLEANUPS];
205
206
	BOOL	sent_headers;
	BOOL	prev_write;
207
208
209
} http_request_t;

typedef struct  {
210
211
	SOCKET			socket;
	SOCKADDR_IN		addr;
212
	http_request_t	req;
213
214
	char			host_ip[64];
	char			host_name[128];	/* Resolved remote host */
215
216
	int				http_ver;       /* HTTP version.  0 = HTTP/0.9, 1=HTTP/1.0, 2=HTTP/1.1 */
	BOOL			finished;		/* Do not accept any more imput from client */
217
218
219
	user_t			user;
	int				last_user_num;
	time_t			logon_time;
220
	char			username[LEN_NAME+1];
221
	int				last_js_user_num;
222
223
224
225
226

	/* JavaScript parameters */
	JSRuntime*		js_runtime;
	JSContext*		js_cx;
	JSObject*		js_glob;
227
228
229
	JSObject*		js_query;
	JSObject*		js_header;
	JSObject*		js_request;
230
	js_branch_t		js_branch;
deuce's avatar
deuce committed
231
	subscan_t		*subscan;
232
233
234

	/* Client info */
	client_t		client;
235
236
237
238
239
} http_session_t;

enum { 
	 HTTP_0_9
	,HTTP_1_0
240
	,HTTP_1_1
241
242
243
244
};
static char* http_vers[] = {
	 ""
	,"HTTP/1.0"
245
	,"HTTP/1.1"
rswindell's avatar
rswindell committed
246
	,NULL	/* terminator */
247
248
249
250
251
252
};

enum { 
	 HTTP_HEAD
	,HTTP_GET
};
253

rswindell's avatar
rswindell committed
254
255
256
static char* methods[] = {
	 "HEAD"
	,"GET"
257
	,"POST"
rswindell's avatar
rswindell committed
258
259
	,NULL	/* terminator */
};
260

261
enum {
262
263
264
265
266
267
	 IS_STATIC
	,IS_CGI
	,IS_JS
	,IS_SSJS
};

268
enum { 
269
270
271
	 HEAD_DATE
	,HEAD_HOST
	,HEAD_IFMODIFIED
272
273
	,HEAD_LENGTH
	,HEAD_TYPE
274
275
276
277
278
	,HEAD_AUTH
	,HEAD_CONNECTION
	,HEAD_WWWAUTH
	,HEAD_STATUS
	,HEAD_ALLOW
279
280
281
282
283
	,HEAD_EXPIRES
	,HEAD_LASTMODIFIED
	,HEAD_LOCATION
	,HEAD_PRAGMA
	,HEAD_SERVER
284
285
	,HEAD_REFERER
	,HEAD_AGENT
286
287
288
289
290
291
};

static struct {
	int		id;
	char*	text;
} headers[] = {
292
293
294
	{ HEAD_DATE,			"Date"					},
	{ HEAD_HOST,			"Host"					},
	{ HEAD_IFMODIFIED,		"If-Modified-Since"		},
295
296
	{ HEAD_LENGTH,			"Content-Length"		},
	{ HEAD_TYPE,			"Content-Type"			},
297
298
299
300
301
	{ HEAD_AUTH,			"Authorization"			},
	{ HEAD_CONNECTION,		"Connection"			},
	{ HEAD_WWWAUTH,			"WWW-Authenticate"		},
	{ HEAD_STATUS,			"Status"				},
	{ HEAD_ALLOW,			"Allow"					},
302
303
304
305
306
	{ HEAD_EXPIRES,			"Expires"				},
	{ HEAD_LASTMODIFIED,	"Last-Modified"			},
	{ HEAD_LOCATION,		"Location"				},
	{ HEAD_PRAGMA,			"Pragma"				},
	{ HEAD_SERVER,			"Server"				},
307
308
	{ HEAD_REFERER,			"Referer"				},
	{ HEAD_AGENT,			"User-Agent"			},
309
	{ -1,					NULL /* terminator */	},
310
311
};

312
/* Everything MOVED_TEMP and everything after is a magical internal redirect */
313
enum  {
314
	 NO_LOCATION
315
	,MOVED_PERM
316
	,MOVED_TEMP
317
	,MOVED_STAT
318
319
};

320
321
322
static char	*days[]={"Sun","Mon","Tue","Wed","Thu","Fri","Sat"};
static char	*months[]={"Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"};

323
static void respond(http_session_t * session);
324
static BOOL js_setup(http_session_t* session);
325
static char *find_last_slash(char *str);
326
static BOOL check_extra_path(http_session_t * session);
327
static BOOL exec_ssjs(http_session_t* session, char *script);
328
static BOOL ssjs_send_headers(http_session_t* session);
329

330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
static time_t
sub_mkgmt(struct tm *tm)
{
        int y, nleapdays;
        time_t t;
        /* days before the month */
        static const unsigned short moff[12] = {
                0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
        };

        /*
         * XXX: This code assumes the given time to be normalized.
         * Normalizing here is impossible in case the given time is a leap
         * second but the local time library is ignorant of leap seconds.
         */

        /* minimal sanity checking not to access outside of the array */
        if ((unsigned) tm->tm_mon >= 12)
                return (time_t) -1;
        if (tm->tm_year < 1970 - 1900)
                return (time_t) -1;

        y = tm->tm_year + 1900 - (tm->tm_mon < 2);
        nleapdays = y / 4 - y / 100 + y / 400 -
            ((1970-1) / 4 - (1970-1) / 100 + (1970-1) / 400);
        t = ((((time_t) (tm->tm_year - (1970 - 1900)) * 365 +
                        moff[tm->tm_mon] + tm->tm_mday - 1 + nleapdays) * 24 +
                tm->tm_hour) * 60 + tm->tm_min) * 60 + tm->tm_sec;

        return (t < 0 ? (time_t) -1 : t);
}

time_t
time_gm(struct tm *tm)
{
        time_t t, t2;
        struct tm *tm2;
        int sec;

        /* Do the first guess. */
        if ((t = sub_mkgmt(tm)) == (time_t) -1)
                return (time_t) -1;

        /* save value in case *tm is overwritten by gmtime() */
        sec = tm->tm_sec;

        tm2 = gmtime(&t);
        if ((t2 = sub_mkgmt(tm2)) == (time_t) -1)
                return (time_t) -1;

        if (t2 < t || tm2->tm_sec != sec) {
                /*
                 * Adjust for leap seconds.
                 *
                 *     real time_t time
                 *           |
                 *          tm
                 *         /        ... (a) first sub_mkgmt() conversion
                 *       t
                 *       |
                 *      tm2
                 *     /        ... (b) second sub_mkgmt() conversion
                 *   t2
                 *                        --->time
                 */
                /*
                 * Do the second guess, assuming (a) and (b) are almost equal.
                 */
                t += t - t2;
                tm2 = gmtime(&t);

                /*
                 * Either (a) or (b), may include one or two extra
                 * leap seconds.  Try t, t + 2, t - 2, t + 1, and t - 1.
                 */
                if (tm2->tm_sec == sec
                    || (t += 2, tm2 = gmtime(&t), tm2->tm_sec == sec)
                    || (t -= 4, tm2 = gmtime(&t), tm2->tm_sec == sec)
                    || (t += 3, tm2 = gmtime(&t), tm2->tm_sec == sec)
                    || (t -= 2, tm2 = gmtime(&t), tm2->tm_sec == sec))
                        ;        /* found */
                else {
                        /*
                         * Not found.
                         */
                        if (sec >= 60)
                                /*
                                 * The given time is a leap second
                                 * (sec 60 or 61), but the time library
                                 * is ignorant of the leap second.
                                 */
                                ;        /* treat sec 60 as 59,
                                           sec 61 as 0 of the next minute */
                        else
                                /* The given time may not be normalized. */
                                t++;        /* restore t */
                }
        }

        return (t < 0 ? (time_t) -1 : t);
}
431

432
static int lprintf(int level, char *fmt, ...)
433
434
435
436
437
438
439
440
441
442
443
{
	va_list argptr;
	char sbuf[1024];

    if(startup==NULL || startup->lputs==NULL)
        return(0);

	va_start(argptr,fmt);
    vsnprintf(sbuf,sizeof(sbuf),fmt,argptr);
	sbuf[sizeof(sbuf)-1]=0;
    va_end(argptr);
444
    return(startup->lputs(startup->cbdata,level,sbuf));
445
446
447
448
449
}

#ifdef _WINSOCKAPI_

static WSADATA WSAData;
450
#define SOCKLIB_DESC WSAData.szDescription
451
452
453
454
455
456
457
static BOOL WSAInitialized=FALSE;

static BOOL winsock_startup(void)
{
	int		status;             /* Status Code */

    if((status = WSAStartup(MAKEWORD(1,1), &WSAData))==0) {
458
		lprintf(LOG_INFO,"%s %s",WSAData.szDescription, WSAData.szSystemStatus);
459
460
461
462
		WSAInitialized=TRUE;
		return (TRUE);
	}

463
    lprintf(LOG_ERR,"!WinSock startup ERROR %d", status);
464
465
466
467
468
469
	return (FALSE);
}

#else /* No WINSOCK */

#define winsock_startup()	(TRUE)
470
#define SOCKLIB_DESC NULL
471
472
473
474
475
476

#endif

static void status(char* str)
{
	if(startup!=NULL && startup->status!=NULL)
477
	    startup->status(startup->cbdata,str);
478
479
480
481
482
}

static void update_clients(void)
{
	if(startup!=NULL && startup->clients!=NULL)
483
		startup->clients(startup->cbdata,active_clients);
484
485
486
487
488
}

static void client_on(SOCKET sock, client_t* client, BOOL update)
{
	if(startup!=NULL && startup->client_on!=NULL)
489
		startup->client_on(startup->cbdata,TRUE,sock,client,update);
490
491
492
493
494
}

static void client_off(SOCKET sock)
{
	if(startup!=NULL && startup->client_on!=NULL)
495
		startup->client_on(startup->cbdata,FALSE,sock,NULL,FALSE);
496
497
498
499
500
501
}

static void thread_up(BOOL setuid)
{
	thread_count++;
	if(startup!=NULL && startup->thread_up!=NULL)
502
		startup->thread_up(startup->cbdata,TRUE, setuid);
503
504
505
506
507
508
509
}

static void thread_down(void)
{
	if(thread_count>0)
		thread_count--;
	if(startup!=NULL && startup->thread_up!=NULL)
510
		startup->thread_up(startup->cbdata,FALSE, FALSE);
511
512
}

deuce's avatar
deuce committed
513
514
515
/*********************************************************************/
/* Adds an environment variable to the sessions  cgi_env linked list */
/*********************************************************************/
516
static void add_env(http_session_t *session, const char *name,const char *value)  {
517
	char	newname[129];
518
	char	*p;
519

520
	if(name==NULL || value==NULL)  {
521
		lprintf(LOG_WARNING,"%04d Attempt to set NULL env variable", session->socket);
522
523
524
525
526
527
528
529
530
		return;
	}
	SAFECOPY(newname,name);

	for(p=newname;*p;p++)  {
		*p=toupper(*p);
		if(*p=='-')
			*p='_';
	}
531
532
533
534
535
536
	p=(char *)malloc(strlen(name)+strlen(value)+2);
	if(p==NULL) {
		lprintf(LOG_WARNING,"%04d Cannot allocate memory for string", session->socket);
		return;
	}
	sprintf(p,"%s=%s",newname,value);
537
	strListPush(&session->req.cgi_env,p);
538
	free(p);
539
540
}

deuce's avatar
deuce committed
541
542
543
/***************************************/
/* Initializes default CGI envirnoment */
/***************************************/
544
545
546
547
548
549
550
static void init_enviro(http_session_t *session)  {
	char	str[128];

	add_env(session,"SERVER_SOFTWARE",VERSION_NOTICE);
	sprintf(str,"%d",startup->port);
	add_env(session,"SERVER_PORT",str);
	add_env(session,"GATEWAY_INTERFACE","CGI/1.1");
551
	if(!strcmp(session->host_name,session->host_ip))
552
553
554
555
		add_env(session,"REMOTE_HOST",session->host_name);
	add_env(session,"REMOTE_ADDR",session->host_ip);
}

556
/*
deuce's avatar
deuce committed
557
 * Sends string str to socket sock... returns number of bytes written, or 0 on an error
558
559
560
561
 * (Should it be -1 on an error?)
 * Can not close the socket since it can not set it to INVALID_SOCKET
 * ToDo - Decide error behaviour, should a SOCKET * be passed around rather than a socket?
 */
562
563
static int sockprint(SOCKET sock, const char *str)
{
564
565
566
	int len;
	int	result;
	int written=0;
567
	BOOL	wr;
568
569
570

	if(sock==INVALID_SOCKET)
		return(0);
571
	if(startup->options&WEB_OPT_DEBUG_TX)
572
		lprintf(LOG_DEBUG,"%04d TX: %s", sock, str);
573
	len=strlen(str);
574

575
	while(socket_check(sock,NULL,&wr,startup->max_inactivity*1000) && wr && written<len)  {
576
		result=sendsocket(sock,str+written,len-written);
577
578
		if(result==SOCKET_ERROR) {
			if(ERROR_VALUE==ECONNRESET) 
579
				lprintf(LOG_NOTICE,"%04d Connection reset by peer on send",sock);
580
			else if(ERROR_VALUE==ECONNABORTED) 
581
				lprintf(LOG_NOTICE,"%04d Connection aborted by peer on send",sock);
582
			else
583
				lprintf(LOG_WARNING,"%04d !ERROR %d sending on socket",sock,ERROR_VALUE);
584
585
			return(0);
		}
586
587
588
		written+=result;
	}
	if(written != len) {
589
		lprintf(LOG_WARNING,"%04d !ERROR %d sending on socket",sock,ERROR_VALUE);
590
591
592
593
594
		return(0);
	}
	return(len);
}

deuce's avatar
deuce committed
595
596
597
598
/**********************************************************/
/* Converts a month name/abbr to the 0-based month number */
/* ToDo: This probobly exists somewhere else already	  */
/**********************************************************/
599
600
601
602
603
604
605
606
607
608
static int getmonth(char *mon)
{
	int	i;
	for(i=0;i<12;i++)
		if(!stricmp(mon,months[i]))
			return(i);

	return 0;
}

deuce's avatar
deuce committed
609
610
611
/*******************************************************************/
/* Converts a date string in any of the common formats to a time_t */
/*******************************************************************/
612
613
614
static time_t decode_date(char *date)
{
	struct	tm	ti;
615
616
	char	*token;
	time_t	t;
617
618
619
620
621
622
623
624
625

	ti.tm_sec=0;		/* seconds (0 - 60) */
	ti.tm_min=0;		/* minutes (0 - 59) */
	ti.tm_hour=0;		/* hours (0 - 23) */
	ti.tm_mday=1;		/* day of month (1 - 31) */
	ti.tm_mon=0;		/* month of year (0 - 11) */
	ti.tm_year=0;		/* year - 1900 */
	ti.tm_isdst=0;		/* is summer time in effect? */

626
	token=strtok(date,",");
627
628
	if(token==NULL)
		return(0);
629
630
	/* This probobly only needs to be 9, but the extra one is for luck. */
	if(strlen(date)>15) {
631
		/* asctime() */
632
633
		/* Toss away week day */
		token=strtok(date," ");
634
635
		if(token==NULL)
			return(0);
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
		token=strtok(NULL," ");
		if(token==NULL)
			return(0);
		ti.tm_mon=getmonth(token);
		token=strtok(NULL," ");
		if(token==NULL)
			return(0);
		ti.tm_mday=atoi(token);
		token=strtok(NULL,":");
		if(token==NULL)
			return(0);
		ti.tm_hour=atoi(token);
		token=strtok(NULL,":");
		if(token==NULL)
			return(0);
		ti.tm_min=atoi(token);
		token=strtok(NULL," ");
		if(token==NULL)
			return(0);
		ti.tm_sec=atoi(token);
		token=strtok(NULL,"");
		if(token==NULL)
			return(0);
		ti.tm_year=atoi(token)-1900;
660
661
662
	}
	else  {
		/* RFC 1123 or RFC 850 */
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
		token=strtok(NULL," -");
		if(token==NULL)
			return(0);
		ti.tm_mday=atoi(token);
		token=strtok(NULL," -");
		if(token==NULL)
			return(0);
		ti.tm_mon=getmonth(token);
		token=strtok(NULL," ");
		if(token==NULL)
			return(0);
		ti.tm_year=atoi(token);
		token=strtok(NULL,":");
		if(token==NULL)
			return(0);
		ti.tm_hour=atoi(token);
		token=strtok(NULL,":");
		if(token==NULL)
			return(0);
		ti.tm_min=atoi(token);
		token=strtok(NULL," ");
		if(token==NULL)
			return(0);
		ti.tm_sec=atoi(token);
687
688
689
		if(ti.tm_year>1900)
			ti.tm_year -= 1900;
	}
690

691
	t=time_gm(&ti);
692
	return(t);
693
694
695
696
697
698
699
700
701
}

static SOCKET open_socket(int type)
{
	char	error[256];
	SOCKET	sock;

	sock=socket(AF_INET, type, IPPROTO_IP);
	if(sock!=INVALID_SOCKET && startup!=NULL && startup->socket_open!=NULL) 
702
		startup->socket_open(startup->cbdata,TRUE);
703
704
	if(sock!=INVALID_SOCKET) {
		if(set_socket_options(&scfg, sock,error))
705
			lprintf(LOG_ERR,"%04d !ERROR %s",sock,error);
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721

		sockets++;
	}
	return(sock);
}

static int close_socket(SOCKET sock)
{
	int		result;

	if(sock==INVALID_SOCKET)
		return(-1);

	shutdown(sock,SHUT_RDWR);	/* required on Unix */
	result=closesocket(sock);
	if(startup!=NULL && startup->socket_open!=NULL) {
722
		startup->socket_open(startup->cbdata,FALSE);
723
724
725
726
	}
	sockets--;
	if(result!=0) {
		if(ERROR_VALUE!=ENOTSOCK)
727
			lprintf(LOG_WARNING,"%04d !ERROR %d closing socket",sock, ERROR_VALUE);
728
729
730
731
732
	}

	return(result);
}

deuce's avatar
deuce committed
733
734
735
736
737
738
739
740
/**************************************************/
/* End of a single request...					  */
/* This is called at the end of EVERY request	  */
/*  Log the request       						  */
/*  Free request-specific data ie: dynamic stuff  */
/*  Close socket unless it's being kept alive     */
/*   If the socket is closed, the session is done */
/**************************************************/
741
742
static void close_request(http_session_t * session)
{
743
	time_t		now;
744
	int			i;
745

746
747
748
	if(session->req.ld!=NULL) {
		now=time(NULL);
		localtime_r(&now,&session->req.ld->completed);
749
		listPushNode(&log_list,session->req.ld);
750
751
752
		sem_post(&log_sem);
		session->req.ld=NULL;
	}
753

754
755
756
	strListFree(&session->req.headers);
	strListFree(&session->req.dynamic_heads);
	strListFree(&session->req.cgi_env);
757
	FREE_AND_NULL(session->req.post_data);
758
	if(!session->req.keep_alive) {
759
		close_socket(session->socket);
760
		session->socket=INVALID_SOCKET;
761
	}
762
763
764
	if(session->socket==INVALID_SOCKET)
		session->finished=TRUE;

deuce's avatar
deuce committed
765
766
767
	if(session->js_cx!=NULL && (session->req.dynamic==IS_SSJS || session->req.dynamic==IS_JS)) {
		JS_GC(session->js_cx);
	}
deuce's avatar
deuce committed
768
769
	if(session->subscan!=NULL)
		putmsgptrs(&scfg, session->user.number, session->subscan);
deuce's avatar
deuce committed
770

771
772
773
	if(session->req.fp!=NULL)
		fclose(session->req.fp);

774
775
776
777
778
779
	for(i=0;i<MAX_CLEANUPS;i++) {
		if(session->req.cleanup_file[i]!=NULL) {
			if(!(startup->options&WEB_OPT_DEBUG_SSJS))
				remove(session->req.cleanup_file[i]);
			free(session->req.cleanup_file[i]);
		}
780
781
	}

782
	memset(&session->req,0,sizeof(session->req));
783
784
785
786
}

static int get_header_type(char *header)
{
787
	int i;
788
789
790
791
792
793
794
795
	for(i=0; headers[i].text!=NULL; i++) {
		if(!stricmp(header,headers[i].text)) {
			return(headers[i].id);
		}
	}
	return(-1);
}

deuce's avatar
deuce committed
796
/* Opposite of get_header_type() */
797
798
static char *get_header(int id) 
{
799
	int i;
800
801
	if(headers[id].id==id)
		return(headers[id].text);
802
803
804
805
806
807
808
809
810

	for(i=0;headers[i].text!=NULL;i++) {
		if(headers[i].id==id) {
			return(headers[i].text);
		}
	}
	return(NULL);
}

811
812
static const char* unknown_mime_type="application/octet-stream";

813
static const char* get_mime_type(char *ext)
814
815
816
817
{
	uint i;

	if(ext==NULL)
818
819
		return(unknown_mime_type);

820
821
822
	for(i=0;mime_types[i]!=NULL;i++)
		if(!stricmp(ext+1,mime_types[i]->name))
			return(mime_types[i]->value);
823
824

	return(unknown_mime_type);
825
826
}

827
828
/* This function appends append plus a newline IF the final dst string would have a length less than maxlen */
static void safecat(char *dst, const char *append, size_t maxlen) {
829
	size_t dstlen,appendlen;
830
831
832
833
834
835
836
837
	dstlen=strlen(dst);
	appendlen=strlen(append);
	if(dstlen+appendlen+2 < maxlen) {
		strcat(dst,append);
		strcat(dst,newline);
	}
}

deuce's avatar
deuce committed
838
839
840
841
/*************************************************/
/* Sends headers for the reply.					 */
/* HTTP/0.9 doesn't use headers, so just returns */
/*************************************************/
842
static BOOL send_headers(http_session_t *session, const char *status)
843
{
844
	int		ret;
845
	BOOL	send_file=TRUE;
846
	time_t	ti;
847
	size_t	idx;
848
	const char	*status_line;
849
	struct stat	stats;
850
	struct tm	tm;
851
	char	*headers;
852
	char	header[MAX_REQUEST_LINE+1];
853

854
855
	if(session->socket==INVALID_SOCKET)
		return(FALSE);
856
857
858
	lprintf(LOG_DEBUG,"%04d Request resolved to: %s"
		,session->socket,session->req.physical_path);
	if(session->http_ver <= HTTP_0_9) {
deuce's avatar
deuce committed
859
860
		if(session->req.ld != NULL)
			session->req.ld->status=atoi(status);
deuce's avatar
deuce committed
861
		return(TRUE);
862
	}
deuce's avatar
deuce committed
863

864
	status_line=status;
865
	ret=stat(session->req.physical_path,&stats);
866
	if(!ret && session->req.if_modified_since && (stats.st_mtime <= session->req.if_modified_since) && !session->req.dynamic) {
867
		status_line="304 Not Modified";
868
		ret=-1;
869
		send_file=FALSE;
870
	}
871
	if(session->req.send_location==MOVED_PERM)  {
872
		status_line=error_301;
873
874
875
		ret=-1;
		send_file=FALSE;
	}
876
	if(session->req.send_location==MOVED_TEMP)  {
877
		status_line=error_302;
878
879
880
		ret=-1;
		send_file=FALSE;
	}
881

882
883
884
	if(session->req.ld!=NULL)
		session->req.ld->status=atoi(status_line);

885
886
	headers=malloc(MAX_HEADERS_SIZE);
	if(headers==NULL)  {
887
		lprintf(LOG_CRIT,"Could not allocate memory for response headers.");
888
889
890
		return(FALSE);
	}
	*headers=0;
891
	/* Status-Line */
892
	safe_snprintf(header,sizeof(header),"%s %s",http_vers[session->http_ver],status_line);
893
894
895

	lprintf(LOG_DEBUG,"%04d Result: %s",session->socket,header);

896
	safecat(headers,header,MAX_HEADERS_SIZE);
897
898
899

	/* General Headers */
	ti=time(NULL);
900
901
	if(gmtime_r(&ti,&tm)==NULL)
		memset(&tm,0,sizeof(tm));
902
	safe_snprintf(header,sizeof(header),"%s: %s, %02d %s %04d %02d:%02d:%02d GMT"
903
904
905
		,get_header(HEAD_DATE)
		,days[tm.tm_wday],tm.tm_mday,months[tm.tm_mon]
		,tm.tm_year+1900,tm.tm_hour,tm.tm_min,tm.tm_sec);
906
907
	safecat(headers,header,MAX_HEADERS_SIZE);
	if(session->req.keep_alive) {
908
		safe_snprintf(header,sizeof(header),"%s: %s",get_header(HEAD_CONNECTION),"Keep-Alive");
909
910
911
		safecat(headers,header,MAX_HEADERS_SIZE);
	}
	else {
912
		safe_snprintf(header,sizeof(header),"%s: %s",get_header(HEAD_CONNECTION),"Close");
913
914
		safecat(headers,header,MAX_HEADERS_SIZE);
	}
915
916

	/* Response Headers */
917
	safe_snprintf(header,sizeof(header),"%s: %s",get_header(HEAD_SERVER),VERSION_NOTICE);
918
	safecat(headers,header,MAX_HEADERS_SIZE);
919
920
	
	/* Entity Headers */
921
	if(session->req.dynamic) {
922
		safe_snprintf(header,sizeof(header),"%s: %s",get_header(HEAD_ALLOW),"GET, HEAD, POST");
923
924
925
		safecat(headers,header,MAX_HEADERS_SIZE);
	}
	else {
926
		safe_snprintf(header,sizeof(header),"%s: %s",get_header(HEAD_ALLOW),"GET, HEAD");
927
928
		safecat(headers,header,MAX_HEADERS_SIZE);
	}
929

930
	if(session->req.send_location) {
931
		safe_snprintf(header,sizeof(header),"%s: %s",get_header(HEAD_LOCATION),(session->req.virtual_path));
932
		safecat(headers,header,MAX_HEADERS_SIZE);
933
	}
934
	if(session->req.keep_alive) {
deuce's avatar
deuce committed
935
		if(ret)  {
936
			safe_snprintf(header,sizeof(header),"%s: %s",get_header(HEAD_LENGTH),"0");
937
			safecat(headers,header,MAX_HEADERS_SIZE);
deuce's avatar
deuce committed
938
		}
939
		else  {
940
			safe_snprintf(header,sizeof(header),"%s: %d",get_header(HEAD_LENGTH),(int)stats.st_size);
941
			safecat(headers,header,MAX_HEADERS_SIZE);
942
		}
943
	}
944

945
	if(!ret && !session->req.dynamic)  {
946
		safe_snprintf(header,sizeof(header),"%s: %s",get_header(HEAD_TYPE),session->req.mime_type);
947
		safecat(headers,header,MAX_HEADERS_SIZE);
948
		gmtime_r(&stats.st_mtime,&tm);
949
		safe_snprintf(header,sizeof(header),"%s: %s, %02d %s %04d %02d:%02d:%02d GMT"
950
			,get_header(HEAD_LASTMODIFIED)
951
952
			,days[tm.tm_wday],tm.tm_mday,months[tm.tm_mon]
			,tm.tm_year+1900,tm.tm_hour,tm.tm_min,tm.tm_sec);
953
		safecat(headers,header,MAX_HEADERS_SIZE);
954
	} 
rswindell's avatar
rswindell committed
955

956
957
	if(session->req.dynamic)  {
		/* Dynamic headers */
958
		/* Set up environment */
959
960
		for(idx=0;session->req.dynamic_heads[idx]!=NULL;idx++)
			safecat(headers,session->req.dynamic_heads[idx],MAX_HEADERS_SIZE);
961
	}
962

963
	safecat(headers,"",MAX_HEADERS_SIZE);
964
	send_file = (sockprint(session->socket,headers) && send_file);
deuce's avatar
deuce committed
965
	FREE_AND_NULL(headers);
966
	return(send_file);
967
968
}

969
static int sock_sendfile(SOCKET socket,char *path)
970
971
{
	int		file;
972
	long	offset=0;
973
	int		ret=0;
974

975
	if(startup->options&WEB_OPT_DEBUG_TX)
976
		lprintf(LOG_DEBUG,"%04d Sending %s",socket,path);
977
	if((file=open(path,O_RDONLY|O_BINARY))==-1)
978
		lprintf(LOG_WARNING,"%04d !ERROR %d opening %s",socket,errno,path);
979
	else {
980
		if((ret=sendfilesocket(socket, file, &offset, 0)) < 0) {
981
			lprintf(LOG_DEBUG,"%04d !ERROR %d sending %s"
deuce's avatar
deuce committed
982
				, socket, errno, path);
983
984
			ret=0;
		}
985
986
		close(file);
	}
987
	return(ret);
988
989
}

deuce's avatar
deuce committed
990
991
992
993
/********************************************************/
/* Sends a specified error message, closes the request, */
/* and marks the session to be closed 					*/
/********************************************************/
994
static void send_error(http_session_t * session, const char* message)
995
996
{
	char	error_code[4];
997
	struct stat	sb;
998
	char	sbuf[1024];
999
	BOOL	sent_ssjs=FALSE;
1000

1001
1002
	if(session->socket==INVALID_SOCKET)
		return;
1003
	session->req.if_modified_since=0;
1004
	lprintf(LOG_INFO,"%04d !ERROR: %s",session->socket,message);
1005
	session->req.keep_alive=FALSE;
1006
	session->req.send_location=NO_LOCATION;
1007
	SAFECOPY(error_code,message);
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
	SAFECOPY(session->req.status,message);
	if(atoi(error_code)<500) {
		/*
		 * Attempt to run SSJS error pages
		 * If this fails, do the standard error page instead,
		 * ie: Don't "upgrade" to a 500 error
		 */

		sprintf(sbuf,"%s%s.ssjs",error_dir,error_code);
		if(!stat(sbuf,&sb)) {
			lprintf(LOG_INFO,"%04d Using SSJS error page",session->socket);
1019
			session->req.dynamic=IS_SSJS;
1020
1021
			if(js_setup(session)) {
				sent_ssjs=exec_ssjs(session,sbuf);
1022
				if(sent_ssjs) {
1023
1024
1025
1026
1027
1028
1029
1030
1031
					int	snt=0;

					lprintf(LOG_INFO,"%04d Sending generated error page",session->socket);
					snt=sock_sendfile(session->socket,session->req.physical_path);
					if(snt<0)
						snt=0;
					if(session->req.ld!=NULL)
						session->req.ld->size=snt;
				}
1032
1033
				else
					 session->req.dynamic=IS_STATIC;
1034
			}
1035
1036
			else
				session->req.dynamic=IS_STATIC;
1037
		}
1038
	}
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
	if(!sent_ssjs) {
		sprintf(session->req.physical_path,"%s%s.html",error_dir,error_code);
		session->req.mime_type=get_mime_type(strrchr(session->req.physical_path,'.'));
		send_headers(session,message);
		if(!stat(session->req.physical_path,&sb)) {
			int	snt=0;
			snt=sock_sendfile(session->socket,session->req.physical_path);
			if(snt<0)
				snt=0;
			if(session->req.ld!=NULL)
				session->req.ld->size=snt;
		}
		else {
			lprintf(LOG_NOTICE,"%04d Error message file %s doesn't exist"
				,session->socket,session->req.physical_path);
			safe_snprintf(sbuf,sizeof(sbuf)
				,"<HTML><HEAD><TITLE>%s Error</TITLE></HEAD>"
				"<BODY><H1>%s Error</H1><BR><H3>In addition, "
				"I can't seem to find the %s error file</H3><br>"
				"please notify <a href=\"mailto:sysop@%s\">"
				"%s</a></BODY></HTML>"
				,error_code,error_code,error_code,scfg.sys_inetaddr,scfg.sys_op);
			sockprint(session->socket,sbuf);
			if(session->req.ld!=NULL)
				session->req.ld->size=strlen(sbuf);
		}
1065
	}
1066
	session->req.finished=TRUE;
1067
1068
}

1069
1070
void http_logon(http_session_t * session, user_t *usr)
{
1071
1072
	char	str[128];

1073
1074
	if(usr==NULL)
		getuserdat(&scfg, &session->user);
1075
1076
	else
		session->user=*usr;
1077
1078
1079

	if(session->user.number==session->last_user_num)
		return;
1080

1081
	lprintf(LOG_DEBUG,"%04d HTTP Logon (user #%d)",session->socket,session->user.number);
1082

1083
1084
1085
	if(session->subscan!=NULL)
		getmsgptrs(&scfg,session->user.number,session->subscan);

deuce's avatar
deuce committed
1086
	session->logon_time=time(NULL);
1087
	if(session->user.number==0)