File: parser3.C

package info (click to toggle)
parser 3.4.5-4
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 7,552 kB
  • sloc: cpp: 32,375; sh: 11,487; ansic: 10,849; yacc: 1,361; makefile: 248; awk: 5
file content (729 lines) | stat: -rw-r--r-- 20,480 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
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
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
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
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
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
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
/** @file
	Parser: scripting and CGI main.

	Copyright (c) 2001-2017 Art. Lebedev Studio (http://www.artlebedev.com)
	Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
*/

volatile const char * IDENT_PARSER3_C="$Id: parser3.C,v 1.278 2017/02/08 13:05:46 moko Exp $";

#include "pa_config_includes.h"

#include "pa_sapi.h"
#include "classes.h"
#include "pa_common.h"
#include "pa_request.h"
#include "pa_socks.h"
#include "pa_version.h"
#include "pa_vconsole.h"

#ifdef _MSC_VER
#include <crtdbg.h>
#include <windows.h>
#include <direct.h>
#endif

// defines

// comment remove me after debugging
//#define PA_DEBUG_CGI_ENTRY_EXIT	"c:\\parser\\debug-parser3.log"

#if defined(_MSC_VER) && !defined(_DEBUG)
#	define PA_SUPPRESS_SYSTEM_EXCEPTION
#endif

// consts

#define REDIRECT_PREFIX "REDIRECT_"
#define PARSER_CONFIG_ENV_NAME "CGI_PARSER_CONFIG"
#define PARSER_LOG_ENV_NAME "CGI_PARSER_LOG"
#define PARSER_CONFIG_DIR "/etc/parser3"

/// IIS refuses to read bigger chunks
const size_t READ_POST_CHUNK_SIZE=0x400*0x400; // 1M

static const char* argv0;
static const char* config_filespec_cstr=0;
static bool fail_on_config_read_problem=true;

static int args_skip=1;
static char** argv_all = NULL;

static bool cgi; ///< we were started as CGI?
static bool mail_received=false; ///< we were started with -m option? [asked to parse incoming message to $mail:received]

// for signal handlers
Request *request=0;
Request_info *request_info=0;
bool execution_canceled=false;

// SAPI

class SAPI_Info {
public:
	int http_response_code;
} SAPI_info = { 0 };

static void log(const char* fmt, va_list args) {
	bool opened=false;
	FILE *f=0;

	const char* log_by_env=getenv(PARSER_LOG_ENV_NAME);
	if(!log_by_env)
		log_by_env=getenv(REDIRECT_PREFIX PARSER_LOG_ENV_NAME);
	if(log_by_env) {
		f=fopen(log_by_env, "at");
		opened=f!=0;
	}
#ifdef PA_DEBUG_CGI_ENTRY_EXIT
	f=fopen(PA_DEBUG_CGI_ENTRY_EXIT, "at");
	opened=f!=0;
#endif

	if(!opened && config_filespec_cstr) {
		char beside_config_path[MAX_STRING];
		strncpy(beside_config_path, config_filespec_cstr, MAX_STRING-1);  beside_config_path[MAX_STRING-1]=0;
		if(!(rsplit(beside_config_path, '/') || rsplit(beside_config_path, '\\'))) { // strip filename
			// no path, just filename
			beside_config_path[0]='.'; beside_config_path[1]=0;
		}

		char file_spec[MAX_STRING];
		snprintf(file_spec, MAX_STRING, "%s/parser3.log", beside_config_path);
		f=fopen(file_spec, "at");
		opened=f!=0;
	}
	// fallback to stderr
	if(!opened)
		f=stderr;

	// use no memory [so that we could log out-of-memory error]
	setbuf(f, 0); // stderr stream is unbuffered by default, but still...

	// prefix
	time_t t=time(0);
	if(const char* stamp=ctime(&t)) { // never saw that
		if(size_t len=strlen(stamp)) // saw once stamp being =""
			fprintf(f, "[%.*s] [%u] ", (int)len-1, stamp, (unsigned int)getpid() );
	}
	// message

	char buf[MAX_LOG_STRING];
	size_t size=vsnprintf(buf, MAX_LOG_STRING, fmt, args);
	size=remove_crlf(buf, buf+size);
	fwrite(buf, size, 1, f);

	if(request_info)
		fprintf(f, " [uri=%s, method=%s, cl=%lu]",
			request_info->uri? request_info->uri: "<unknown>",
			request_info->method? request_info->method: "<unknown>",
			request_info->content_length);
	else
		fputs(" [no request info]", f);

	// newline
	fputs("\n", f);

	if(opened)
		fclose(f);
	else
		fflush(f);
}

#ifdef PA_DEBUG_CGI_ENTRY_EXIT
static void log(const char* fmt, ...) {
	va_list args;
	va_start(args,fmt);
	log(fmt, args);
	va_end(args);
}
#endif

// appends to parser3.log located beside my binary if openable, to stderr otherwize
void SAPI::log(SAPI_Info&, const char* fmt, ...) {
	va_list args;
	va_start(args,fmt);
	::log(fmt, args);
	va_end(args);
}

static void die_or_abort(const char* fmt, va_list args, bool write_core) {
	// inform user

	char body[MAX_STRING];
	int content_length=vsnprintf(body, MAX_STRING, fmt, args);

	// prepare header
	// let's be honest, that's bad we couldn't produce valid output
	// capitalized headers passed for preventing malloc during capitalization
	SAPI::add_header_attribute(SAPI_info, HTTP_STATUS_CAPITALIZED, "500");
	SAPI::add_header_attribute(SAPI_info, HTTP_CONTENT_TYPE_CAPITALIZED, "text/plain");
	// don't use 'format' function because it calls malloc
	char content_length_cstr[MAX_NUMBER];
	snprintf(content_length_cstr, sizeof(content_length_cstr), "%u", content_length);
	SAPI::add_header_attribute(SAPI_info, HTTP_CONTENT_LENGTH_CAPITALIZED, content_length_cstr);

	// send header
	SAPI::send_header(SAPI_info);

	// body
	SAPI::send_body(SAPI_info, body, content_length);

	// exit & try to produce core dump[unix] or invoke debugger[Win32 Debug version]
	if(write_core) {
#ifdef WIN32
		// IIS with abort failes to show STDOUT, it just barks "abnormal program termination"
		exit(1);
#else
		abort();
#endif
	} else
		exit(1);
}

void SAPI::die(const char* fmt, ...) {
	va_list args;

	// logging first, can't log inside die_or_abort due to vsnprintf (bug #106)
	va_start(args,fmt);
	::log(fmt, args);
	va_end(args);

	va_start(args, fmt);
	die_or_abort(fmt, args, false /*write core?*/);
//	va_end(args);
}

void SAPI::abort(const char* fmt, ...) {
	va_list args;

	// logging first, can't log inside die_or_abort due to vsnprintf (bug #106)
	va_start(args,fmt);
	::log(fmt, args);
	va_end(args);

	va_start(args, fmt);
	die_or_abort(fmt, args, true /*write core?*/);
//	va_end(args);
}

char* SAPI::Env::get(SAPI_Info& , const char* name) {
	if(char *local=getenv(name))
		return pa_strdup(local);
	else
		return 0;
}

const char* const *SAPI::Env::get(SAPI_Info&) {
#ifdef _MSC_VER
	extern char **_environ;
	return _environ;
#else
	extern char **environ;
	return environ;
#endif
}

size_t SAPI::read_post(SAPI_Info& , char *buf, size_t max_bytes) {
	size_t read_size=0;
	do {
		ssize_t chunk_size=read(fileno(stdin), buf+read_size, min(READ_POST_CHUNK_SIZE, max_bytes-read_size));
		if(chunk_size<=0)
			break;
		read_size+=chunk_size;
	} while(read_size<max_bytes);

	return read_size;
}

void SAPI::add_header_attribute(SAPI_Info& , const char* dont_store_key, const char* dont_store_value) {
	if(strcasecmp(dont_store_key, HTTP_STATUS)==0)
		SAPI_info.http_response_code=atoi(dont_store_value);
	if( cgi && (!request || !request->console.was_used()) )
		printf("%s: %s\n", capitalize(dont_store_key), dont_store_value);
}

void SAPI::send_header(SAPI_Info& ) {
	if(cgi) {
		puts("");
	}
}

size_t SAPI::send_body(SAPI_Info& , const void *buf, size_t size) {
	return stdout_write(buf, size);
}

static void full_file_spec(const char* file_name, char *buf, size_t buf_size) {
	if(file_name)
		if(file_name[0]=='/' 
#ifdef WIN32
			|| file_name[0] && file_name[1]==':'
#endif
			)
				strncpy(buf, file_name, buf_size);
		else {
			char cwd[MAX_STRING];
			snprintf(buf, buf_size, "%s/%s", getcwd(cwd, MAX_STRING) ? cwd : "", file_name);
		}
	else
		buf[0]=0;
#ifdef WIN32
	back_slashes_to_slashes(buf);
#endif
}

static void log_signal(const char* signal_name) {
	if(request_info)
		SAPI::log(SAPI_info, "%s received while %s. uri=%s, method=%s, cl=%u",
			signal_name,
			request ? "executing code" : "reading data",
			request_info->uri,
			request_info->method,
			request_info->content_length);
	else
		SAPI::log(SAPI_info, "%s received before or after processing request",
			signal_name);
}

#ifdef SIGUSR1
static void SIGUSR1_handler(int /*sig*/){
	log_signal("SIGUSR1");
}
#endif

#ifdef SIGPIPE
#define SIGPIPE_NAME "SIGPIPE"
static const String sigpipe_name(SIGPIPE_NAME);
static void SIGPIPE_handler(int /*sig*/){
	Value* sigpipe=0;
	if(request)
		sigpipe=request->main_class.get_element(sigpipe_name);
	if(sigpipe && sigpipe->as_bool())
		log_signal(SIGPIPE_NAME);

	execution_canceled=true;
	if(request)
		request->set_skip(Request::SKIP_INTERRUPTED);
}
#endif

#ifdef WIN32
const char* maybe_reconstruct_IIS_status_in_qs(const char* original) 
{
	// 404;http://servername/page[?param=value...]
	// ';' should be urlencoded by HTTP standard, so we shouldn't get it from browser 
	// and can consider that as an indication that this is IIS way to report errors

	if(original && isdigit((unsigned char)original[0]) && isdigit((unsigned char)original[1]) && isdigit((unsigned char)original[2]) && original[3]==';'){
		size_t original_len=strlen(original);
		char* reconstructed=new(PointerFreeGC) char[original_len +12/*IIS-STATUS=&*/ +14/*IIS-DOCUMENT=&*/ +1];
		char* cur=reconstructed;
		memcpy(cur, "IIS-STATUS=", 11);	 cur+=11;
		memcpy(cur, original, 3); cur+=3;
		*cur++='&';

		const char* qmark_at=strchr(original, '?');
		memcpy(cur, "IIS-DOCUMENT=", 13);  cur+=13;
		{
			size_t value_len=(qmark_at ? qmark_at-original : original_len)-4;
			memcpy(cur, original+4, value_len);  cur+=value_len;
		}

		if(qmark_at) {
			*cur++='&';
			strcpy(cur, qmark_at+1/*skip ? itself*/);
		} else
			*cur=0;

		return reconstructed;
	}
	
	return original;
}
#endif


class RequestController {
public:
	RequestController(Request* r){
		::request=r;
	}
	~RequestController(){
		::request=0;
	}
};


/**
main workhorse

  @todo
	IIS: remove trailing default-document[index.html] from $request.uri.
	to do that we need to consult metabase,
	wich is tested but seems slow.
*/
static void real_parser_handler(const char* filespec_to_process, const char* request_method, bool header_only) {
	// init socks
	pa_socks_init();

	// init global variables
	pa_globals_init();
	
	if(!filespec_to_process || !*filespec_to_process)
		SAPI::die("Parser/%s"
#ifdef PA_DEBUG_CGI_ENTRY_EXIT
		" with entry/exit tracing"
#endif
		, PARSER_VERSION);
	
	// Request info
	Request_info request_info;  memset(&request_info, 0, sizeof(request_info));
	char document_root_buf[MAX_STRING];
	if(cgi) {
		if(const char* env_document_root=getenv("DOCUMENT_ROOT"))
			request_info.document_root=env_document_root;
		else if(const char* path_info=getenv("PATH_INFO")) {
			// IIS
			size_t len=min(sizeof(document_root_buf)-1, strlen(filespec_to_process)-strlen(path_info));
			memcpy(document_root_buf, filespec_to_process, len); document_root_buf[len]=0;
			request_info.document_root=document_root_buf;
		} else
			throw Exception(PARSER_RUNTIME, 0, "CGI: no PATH_INFO defined(in reinventing DOCUMENT_ROOT)");
	} else {
		full_file_spec("", document_root_buf, sizeof(document_root_buf));
		request_info.document_root=document_root_buf;
	}
	request_info.path_translated=filespec_to_process;
	request_info.method=request_method ? request_method : "GET";
	const char* query_string=
#ifdef WIN32
		maybe_reconstruct_IIS_status_in_qs
#endif
		(getenv("QUERY_STRING"));
	request_info.query_string=query_string;
	if(cgi) {
		// few absolute obligatory
		const char* path_info=getenv("PATH_INFO");
		if(!path_info)
			SAPI::die("CGI: illegal call (missing PATH_INFO)");
		const char* script_name=getenv("SCRIPT_NAME");
		if(!script_name)
				SAPI::die("CGI: illegal call (missing SCRIPT_NAME)");

		const char* env_request_uri=request_info.strip_absolute_uri(getenv("REQUEST_URI"));
		if(env_request_uri)
			request_info.uri=env_request_uri;
		else 
			if(query_string) {
				char* reconstructed_uri=new(PointerFreeGC) char[strlen(path_info) + 1/*'?'*/+ strlen(query_string) + 1/*0*/];
				strcpy(reconstructed_uri, path_info);
				strcat(reconstructed_uri, "?");
				strcat(reconstructed_uri, query_string);
				request_info.uri=reconstructed_uri;
			} else
				request_info.uri=path_info;

		if(env_request_uri) { // apache & others stuck to standards
			/*
				http://parser3/env.html?123  =OK
				$request:uri=/env.html?123
				REQUEST_URI='/env.html?123'
				SCRIPT_NAME='/cgi-bin/parser3'
				PATH_INFO='/env.html'

				http://parser3/cgi-bin/parser3/env.html?123 =ERROR
				$request:uri=/cgi-bin/parser3/env.html?123
				REQUEST_URI='/cgi-bin/parser3/env.html?123'
				SCRIPT_NAME='/cgi-bin/parser3'
				PATH_INFO='/env.html'
			*/
			size_t script_name_len=strlen(script_name);
			size_t uri_len=strlen(env_request_uri);
			if(strncmp(env_request_uri, script_name, script_name_len)==0 && script_name_len != uri_len) // under IIS they are the same
				SAPI::die("CGI: illegal call (1)");
		} else { // seen on IIS5
			/*
				http://nestle/env.html?123 =OK
				$request:uri=/env.html?123
				REQUEST_URI=''
				SCRIPT_NAME='/env.html'
				PATH_INFO='/env.html'

				http://nestle/cgi-bin/parser3.exe/env.html =ERROR
				$request:uri=/env.html
				REQUEST_URI=''
				SCRIPT_NAME='/cgi-bin/parser3.exe'
				PATH_INFO='/env.html'
			*/
			if(strcmp(script_name, path_info)!=0)
				SAPI::die("CGI: illegal call (2)");
		}
	} else
		request_info.uri="";
	
	request_info.content_type=getenv("CONTENT_TYPE");
	const char* content_length=getenv("CONTENT_LENGTH");
	request_info.content_length=(content_length?atoi(content_length):0);
	request_info.cookie=getenv("HTTP_COOKIE");
	request_info.mail_received=mail_received;

	request_info.argv=argv_all;
	request_info.args_skip=args_skip;

	// get request_info ptr for signal handlers
	::request_info=&request_info;
	if(execution_canceled)
		SAPI::die("Execution canceled");

#ifdef PA_DEBUG_CGI_ENTRY_EXIT
	log("request_info: method=%s, uri=%s, q=%s, dr=%s, pt=%s, cookies=%s, cl=%u", 
		request_info.method,
		request_info.uri,
		request_info.query_string,
		request_info.document_root,
		request_info.path_translated,
		request_info.cookie,
		request_info.content_length);
#endif

	// prepare to process request
	Request request(SAPI_info, request_info, cgi ? String::Language(String::L_HTML|String::L_OPTIMIZE_BIT) : String::L_AS_IS);

	{
		// get ::request ptr for signal handlers
		RequestController rc(&request);

		char config_filespec_buf[MAX_STRING];
		if(!config_filespec_cstr) {
			const char* config_by_env=getenv(PARSER_CONFIG_ENV_NAME);
			if(!config_by_env)
				config_by_env=getenv(REDIRECT_PREFIX PARSER_CONFIG_ENV_NAME);
			if(config_by_env)
				config_filespec_cstr=config_by_env;
			else {
				// beside by binary
				char beside_binary_path[MAX_STRING];
				strncpy(beside_binary_path, argv0, MAX_STRING-1);  beside_binary_path[MAX_STRING-1]=0; // filespec of my binary
				if(!(rsplit(beside_binary_path, '/') || rsplit(beside_binary_path, '\\'))) { // strip filename
					// no path, just filename
					// @todo full path, not ./!
					beside_binary_path[0]='.'; beside_binary_path[1]=0;
				}
				snprintf(config_filespec_buf, MAX_STRING, "%s/%s", beside_binary_path, AUTO_FILE_NAME);
				config_filespec_cstr=config_filespec_buf;
                if (!entry_exists(config_filespec_cstr)) // default system-wide...
                    config_filespec_cstr=PARSER_CONFIG_DIR "/" AUTO_FILE_NAME;
				fail_on_config_read_problem=entry_exists(config_filespec_cstr);
			}
		}
		
		// process the request
		request.core(config_filespec_cstr, fail_on_config_read_problem, header_only);

		// ::request cleared in RequestController desctructor to prevent signal handlers from accessing invalid memory
	}

	// finalize global variables
	pa_globals_done();

	//
	pa_socks_done();
}

#ifdef PA_SUPPRESS_SYSTEM_EXCEPTION
static const Exception call_real_parser_handler__do_PEH_return_it(const char* filespec_to_process, const char* request_method, bool header_only){
	try {
		real_parser_handler(filespec_to_process, request_method, header_only);
	} catch(const Exception& e) {
		return e;
	}

	return Exception();
}

static void call_real_parser_handler__supress_system_exception(const char* filespec_to_process, const char* request_method, bool header_only){
	Exception parser_exception;
	LPEXCEPTION_POINTERS system_exception=0;

	__try {
		parser_exception=call_real_parser_handler__do_PEH_return_it(filespec_to_process, request_method, header_only);
	} __except (
		(system_exception=GetExceptionInformation()), 
		EXCEPTION_EXECUTE_HANDLER) 
	{

		if(system_exception)
			if(_EXCEPTION_RECORD *er=system_exception->ExceptionRecord)
				throw Exception("system", 0, "0x%08X at 0x%08X", er->ExceptionCode,  er->ExceptionAddress);
			else
				throw Exception("system", 0, "<no exception record>");
		else
			throw Exception("system", 0, "<no exception information>");
	}

	if(parser_exception)
		throw Exception(parser_exception);
}

#define REAL_PARSER_HANDLER call_real_parser_handler__supress_system_exception
#else
#define REAL_PARSER_HANDLER real_parser_handler
#endif

static void usage(const char* program) {
	printf(
		"Parser/%s\n"
		"Copyright (c) 2001-2017 Art. Lebedev Studio (http://www.artlebedev.com)\n"
		"Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)\n"
		"\n"
		"Usage: %s [options] file\n"
		"Options are:\n"
#ifdef WITH_MAILRECEIVE
		"    -m              Parse mail, put received letter to $mail:received\n"
#endif
		"    -f config_file  Use this config file (/path/to/auto.p)\n"
		"    -h              Display usage information (this message)\n",
		PARSER_VERSION,
		program);
	exit(EINVAL);
}

int main(int argc, char *argv[]) {
#ifdef PA_DEBUG_CGI_ENTRY_EXIT
	log("main: entry");
#endif

#ifndef PA_DEBUG_DISABLE_GC
	GC_java_finalization=0;
	// Dont collect unless explicitly requested 
	// this is quicker (~30% ), but less memory-efficient(~8%)
	// so deciding for speed
	GC_dont_gc=1; 
#endif

#ifdef SIGUSR1
    if(signal(SIGUSR1, SIGUSR1_handler)==SIG_ERR)
		SAPI::die("Can not set handler for SIGUSR1");
#endif
#ifdef SIGPIPE
    if(signal(SIGPIPE, SIGPIPE_handler)==SIG_ERR)
		SAPI::die("Can not set handler for SIGPIPE");
#endif

	argv_all=argv;
	argv0=argv[0];

	umask(2);

	// were we started as CGI?
	cgi=(getenv("SERVER_SOFTWARE") || getenv("SERVER_NAME") || getenv("GATEWAY_INTERFACE") || getenv("REQUEST_METHOD")) && !getenv("PARSER_VERSION");

	char *raw_filespec_to_process;
	if(cgi) {
		raw_filespec_to_process=getenv("PATH_TRANSLATED");
		if(raw_filespec_to_process && !*raw_filespec_to_process)
			raw_filespec_to_process=0;
	} else {
		int optind=1;
		while(optind < argc){
			char *carg = argv[optind];
			if(carg[0] != '-')
				break;

			for(size_t k = 1; k < strlen(carg); k++){
				char c = carg[k];
				switch (c) {
					case 'h':
						usage(argv[0]);
						break;
					case 'f':
						if(optind < argc - 1){
							optind++;
							config_filespec_cstr=argv[optind];
						}
						break;
#ifdef WITH_MAILRECEIVE
					case 'm':
						mail_received=true;
						break;
#endif
					default:
						fprintf(stderr, "%s: invalid option '%c'\n", argv[0], c);
						usage(argv[0]);
						break;
				}
			}
			optind++;
		}
		
		if (optind > argc - 1) {
			fprintf(stderr, "%s: file not specified\n", argv[0]);
			usage(argv[0]);
		}
		raw_filespec_to_process=argv[optind];
		args_skip=optind;
	}

#ifdef _MSC_VER
	setmode(fileno(stdin), _O_BINARY);
	setmode(fileno(stdout), _O_BINARY);
	setmode(fileno(stderr), _O_BINARY);
#endif

#if defined(_MSC_VER) && defined(_DEBUG)
	// Get current flag
	int tmpFlag = _CrtSetDbgFlag( _CRTDBG_REPORT_FLAG );

	// Turn on leak-checking bit
	tmpFlag |= _CRTDBG_LEAK_CHECK_DF;

	// Set flag to the new value
	_CrtSetDbgFlag( tmpFlag );

	_CrtSetReportMode( _CRT_WARN, _CRTDBG_MODE_FILE );
	_CrtSetReportFile( _CRT_WARN, _CRTDBG_FILE_STDERR );
#endif

	char filespec_to_process[MAX_STRING];
	full_file_spec(raw_filespec_to_process, filespec_to_process, sizeof(filespec_to_process));

	const char* request_method=getenv("REQUEST_METHOD");
	bool header_only=request_method && strcasecmp(request_method, "HEAD")==0;

	try { // global try
		REAL_PARSER_HANDLER(filespec_to_process, request_method, header_only);
	} catch(const Exception& e) { // global problem 
		// don't allocate anything on pool here:
		//   possible pool' exception not catch-ed now
		//   and there could be out-of-memory exception
		char buf[MAX_STRING];
		snprintf(buf, MAX_STRING, "Unhandled exception %s", e.comment());
		// log it
		SAPI::log(SAPI_info, "%s", buf);

		//
		int content_length=strlen(buf);

		// prepare header
		// capitalized headers are used for preventing malloc during capitalization
		SAPI::add_header_attribute(SAPI_info, HTTP_CONTENT_TYPE_CAPITALIZED, "text/plain");
		// don't use 'format' function because it calls malloc
		char content_length_cstr[MAX_NUMBER];
		snprintf(content_length_cstr, MAX_NUMBER, "%u", content_length);
		SAPI::add_header_attribute(SAPI_info, HTTP_CONTENT_LENGTH_CAPITALIZED, content_length_cstr);

		// send header
		SAPI::send_header(SAPI_info);

		// send body
		if(!header_only)
			SAPI::send_body(SAPI_info, buf, content_length);

		// unsuccessful finish
	}

#ifdef PA_DEBUG_CGI_ENTRY_EXIT
	log("main: successful return");
#endif
	return SAPI_info.http_response_code < 100 ? SAPI_info.http_response_code : 0;
}