Annotation of parser3/src/targets/cgi/parser3.C, revision 1.201
1.27 paf 1: /** @file
2: Parser: scripting and CGI main.
3:
1.155 paf 4: Copyright(c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com)
1.154 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.189 paf 6: */
1.27 paf 7:
1.201 ! paf 8: static const char* IDENT_PARSER3_C="$Date: 2002/11/20 09:44:44 $";
1.1 paf 9:
1.40 paf 10: #include "pa_config_includes.h"
1.3 paf 11:
1.139 paf 12: #if _MSC_VER
1.131 paf 13: # include <new.h>
1.148 paf 14: # include <crtdbg.h>
1.3 paf 15: #endif
1.27 paf 16:
1.37 paf 17: #include "pa_sapi.h"
1.76 paf 18: #include "classes.h"
1.24 paf 19: #include "pa_common.h"
1.2 paf 20: #include "pa_request.h"
1.57 paf 21: #include "pa_socks.h"
1.68 paf 22: #include "pa_version.h"
1.125 parser 23: #include "pool_storage.h"
1.69 paf 24:
1.149 paf 25: #ifdef WIN32
26: # include <windows.h>
1.184 paf 27: # include "getopt.h"
28: #else
29: # include <getopt.h>
1.120 parser 30: #endif
31:
1.158 paf 32: //#define DEBUG_POOL_MALLOC
1.162 paf 33: //#define DEBUG_STRING_APPENDS_VS_EXPANDS
1.196 paf 34: //#define DEBUG_MAILRECEIVE "mailreceive.eml"
1.160 paf 35:
36: #ifdef DEBUG_STRING_APPENDS_VS_EXPANDS
37: extern ulong
38: string_piece_appends,
39: wcontext_result_size,
40: total_alloc_size,
41: string_string_shortcut_economy;
42: #endif
1.84 parser 43:
1.109 parser 44: // consts
1.84 parser 45:
1.175 paf 46: #define REDIRECT_PREFIX "REDIRECT_"
1.181 paf 47: #define PARSER_CONFIG_ENV_NAME "CGI_PARSER_CONFIG"
1.159 paf 48:
1.42 paf 49: /// IIS refuses to read bigger chunks
50: const size_t READ_POST_CHUNK_SIZE=0x400*0x400; // 1M
51:
1.184 paf 52: static const char *argv0;
1.193 paf 53: static const char *config_filespec_cstr=0;
54: static bool fail_on_config_read_problem=true;
1.192 paf 55:
1.198 paf 56: static Pool_storage global_pool_storage; ///< global pool storage
57: static Pool global_pool(&global_pool_storage); ///< global pool
1.184 paf 58: static bool cgi; ///< we were started as CGI?
59: static bool mail_received=false; ///< we were started with -m option? [asked to parse incoming message to $mail:received]
1.5 paf 60:
1.201 ! paf 61: // for signal handlers
! 62: Request *request=0;
! 63:
1.46 paf 64: // SAPI
1.86 parser 65:
1.124 parser 66: static void log(const char *fmt, va_list args) {
1.193 paf 67: bool opened=false;
1.61 paf 68: FILE *f=0;
69:
1.193 paf 70: if(config_filespec_cstr) {
71: char beside_config_path[MAX_STRING];
72: strncpy(beside_config_path, config_filespec_cstr, MAX_STRING-1); beside_config_path[MAX_STRING-1]=0;
73: if(!(
74: rsplit(beside_config_path, '/') ||
75: rsplit(beside_config_path, '\\'))) { // strip filename
76: // no path, just filename
77: beside_config_path[0]='.'; beside_config_path[1]=0;
78: }
79:
80: char file_spec[MAX_STRING];
81: snprintf(file_spec, MAX_STRING,
82: "%s/parser3.log", beside_config_path);
83: f=fopen(file_spec, "at");
84: opened=f!=0;
85: }
1.192 paf 86: // fallback to stderr
1.61 paf 87: if(!opened)
88: f=stderr;
89:
90: // prefix
91: time_t t=time(0);
1.171 paf 92: if(const char *stamp=ctime(&t)) { // never saw that
1.173 paf 93: if(size_t len=strlen(stamp)) // saw once stamp being =""
1.172 paf 94: fprintf(f, "[%.*s] ", len-1, stamp);
1.171 paf 95: }
1.61 paf 96: // message
1.117 parser 97:
98: char buf[MAX_STRING];
99: size_t size=vsnprintf(buf, MAX_STRING, fmt, args);
100: remove_crlf(buf, buf+size);
101:
102: fwrite(buf, size, 1, f);
1.61 paf 103: // newline
104: fprintf(f, "\n");
105:
106: if(opened)
107: fclose(f);
1.85 parser 108: else
109: fflush(f);
1.124 parser 110: }
111:
112: // appends to parser3.log located beside my binary if openable, to stderr otherwize
113: void SAPI::log(Pool& , const char *fmt, ...) {
114: va_list args;
115: va_start(args,fmt);
116: ::log(fmt, args);
117: va_end(args);
118: }
119:
120: void SAPI::die(const char *fmt, ...) {
1.137 paf 121: #ifdef DEBUG_POOL_MALLOC
122: extern void log_pool_stats(Pool& pool);
1.198 paf 123: log_pool_stats(global_pool);
1.137 paf 124: #endif
125:
1.144 paf 126: va_list args;
127: va_start(args,fmt);
1.138 paf 128: // log
129:
130: // logging is more important than user
131: // she can cancel download, we'd get SIG_PIPE,
132: // nothing would be logged then
1.124 parser 133: ::log(fmt, args);
134:
1.138 paf 135: // inform user
136:
1.134 paf 137: char body[MAX_STRING];
1.138 paf 138: int content_length=vsnprintf(body, MAX_STRING, fmt, args);
1.134 paf 139:
1.144 paf 140: va_end(args);
141:
1.134 paf 142: // prepare header
143: // let's be honest, that's bad we couldn't produce valid output
1.198 paf 144: SAPI::add_header_attribute(global_pool, "status", "500");
145: SAPI::add_header_attribute(global_pool, "content-type", "text/plain");
1.134 paf 146: char content_length_cstr[MAX_NUMBER];
1.168 paf 147: snprintf(content_length_cstr, sizeof(content_length_cstr), "%u", content_length);
1.198 paf 148: SAPI::add_header_attribute(global_pool, "content-length", content_length_cstr);
1.134 paf 149:
150: // send header
1.198 paf 151: SAPI::send_header(global_pool);
1.134 paf 152:
153: // body
1.198 paf 154: SAPI::send_body(global_pool, body, content_length);
1.134 paf 155:
1.124 parser 156: exit(1);
1.61 paf 157: }
158:
1.122 parser 159: const char *SAPI::get_env(Pool& , const char *name) {
1.109 parser 160: return getenv(name);
1.28 paf 161: }
162:
1.180 paf 163: const char *const *SAPI::environment(Pool&) {
164: #ifdef _MSC_VER
165: extern char **_environ;
166: return _environ;
167: #else
168: extern char **environ;
169: return environ;
170: #endif
171: }
172:
1.122 parser 173: size_t SAPI::read_post(Pool& , char *buf, size_t max_bytes) {
1.59 paf 174: size_t read_size=0;
1.12 paf 175: do {
1.200 paf 176: ssize_t chunk_size=read(fileno(stdin),
1.42 paf 177: buf+read_size, min(READ_POST_CHUNK_SIZE, max_bytes-read_size));
1.129 paf 178: if(chunk_size<=0)
1.12 paf 179: break;
180: read_size+=chunk_size;
181: } while(read_size<max_bytes);
182:
183: return read_size;
1.10 paf 184: }
185:
1.122 parser 186: void SAPI::add_header_attribute(Pool& , const char *key, const char *value) {
1.68 paf 187: if(cgi)
1.20 paf 188: printf("%s: %s\n", key, value);
1.19 paf 189: }
190:
1.56 paf 191: /// @todo intelligent cache-control
1.122 parser 192: void SAPI::send_header(Pool& ) {
1.33 paf 193: if(cgi) {
1.147 paf 194: // puts("expires: Fri, 23 Mar 2001 09:32:23 GMT");
1.33 paf 195:
196: // header | body delimiter
1.20 paf 197: puts("");
1.33 paf 198: }
1.30 paf 199: }
1.20 paf 200:
1.122 parser 201: void SAPI::send_body(Pool& , const void *buf, size_t size) {
1.19 paf 202: stdout_write(buf, size);
1.58 paf 203: }
204:
1.97 parser 205: //
206:
1.184 paf 207: static void full_file_spec(const char *file_name, char *buf, size_t buf_size) {
1.167 paf 208: if(file_name)
209: if(file_name[0]=='/'
210: #ifdef WIN32
211: || (file_name[0] && file_name[1]==':')
212: #endif
213: )
214: strncpy(buf, file_name, buf_size);
215: else {
216: char cwd[MAX_STRING]; getcwd(cwd, MAX_STRING);
217: snprintf(buf, buf_size, "%s/%s", cwd, file_name);
218: }
219: else
220: buf[0]=0;
1.166 paf 221: #ifdef WIN32
222: back_slashes_to_slashes(buf);
223: #endif
1.97 parser 224: }
225:
1.201 ! paf 226: #ifdef SIGUSR1
! 227: void SIGUSR1_Handler(int /*sig*/){
! 228: SAPI::log(global_pool, "SIGUSR1 received. url=", request?request->info.uri:"<no request>");
! 229: }
! 230: #endif
! 231:
! 232: #ifdef SIGPIPE
! 233: void SIGPIPE_Handler(int /*sig*/){
! 234: SAPI::log(global_pool, "SIGPIPE received. url=", request?request->info.uri:"<no request>");
! 235: if(request)
! 236: request->interrupt();
! 237: }
! 238: #endif
! 239:
1.40 paf 240: /**
1.122 parser 241: main workhorse
1.19 paf 242:
1.122 parser 243: @todo
1.40 paf 244: IIS: remove trailing default-document[index.html] from $request.uri.
245: to do that we need to consult metabase,
246: wich is tested but seems slow.
1.144 paf 247: IIS5 todo find out proper 'illegal call' check
1.40 paf 248: */
1.184 paf 249: static void real_parser_handler(
1.122 parser 250: const char *filespec_to_process,
251: const char *request_method, bool header_only) {
252: // init socks
1.198 paf 253: init_socks(global_pool);
1.122 parser 254:
255: // init global classes
1.198 paf 256: init_methoded_array(global_pool);
1.122 parser 257: // init global variables
1.198 paf 258: pa_globals_init(global_pool);
1.122 parser 259:
1.198 paf 260: // request pool, must be different ptr from global [used in VStateless_class.add_method]
261: Pool request_pool(&global_pool_storage);
262:
1.186 paf 263: if(!filespec_to_process || !*filespec_to_process)
1.144 paf 264: SAPI::die("Parser/%s", PARSER_VERSION);
1.122 parser 265:
266: // Request info
267: Request::Info request_info;
1.166 paf 268: char document_root_buf[MAX_STRING];
1.122 parser 269: if(cgi) {
1.198 paf 270: if(const char *env_document_root=SAPI::get_env(request_pool, "DOCUMENT_ROOT"))
1.122 parser 271: request_info.document_root=env_document_root;
1.198 paf 272: else if(const char *path_info=SAPI::get_env(request_pool, "PATH_INFO")) {
1.122 parser 273: // IIS
1.166 paf 274: size_t len=min(sizeof(document_root_buf)-1, strlen(filespec_to_process)-strlen(path_info));
275: memcpy(document_root_buf, filespec_to_process, len); document_root_buf[len]=0;
276: request_info.document_root=document_root_buf;
1.122 parser 277: } else
1.165 paf 278: throw Exception("parser.runtime",
279: 0,
280: "CGI: no PATH_INFO defined(in reinventing DOCUMENT_ROOT)");
1.122 parser 281: } else {
1.166 paf 282: full_file_spec("", document_root_buf, sizeof(document_root_buf));
283: request_info.document_root=document_root_buf;
1.122 parser 284: }
285: request_info.path_translated=filespec_to_process;
286: request_info.method=request_method ? request_method : "GET";
1.198 paf 287: const char *query_string=SAPI::get_env(request_pool, "QUERY_STRING");
1.122 parser 288: request_info.query_string=query_string;
289: if(cgi) {
1.198 paf 290: if(const char *env_request_uri=SAPI::get_env(request_pool, "REQUEST_URI"))
1.122 parser 291: request_info.uri=env_request_uri;
1.198 paf 292: else if(const char *path_info=SAPI::get_env(request_pool, "PATH_INFO"))
1.122 parser 293: if(query_string) {
1.198 paf 294: char *reconstructed_uri=(char *)request_pool.malloc(
1.122 parser 295: strlen(path_info)+1/*'?'*/+
296: strlen(query_string)+1/*0*/);
297: strcpy(reconstructed_uri, path_info);
298: strcat(reconstructed_uri, "?");
299: strcat(reconstructed_uri, query_string);
300: request_info.uri=reconstructed_uri;
301: } else
302: request_info.uri=path_info;
1.179 paf 303: else
304: throw Exception("parser.runtime",
305: 0,
306: "CGI: no PATH_INFO defined(in reinventing REQUEST_URI)");
1.145 paf 307:
308: // they've changed this under IIS5.
1.198 paf 309: if(const char *script_name=SAPI::get_env(request_pool, "SCRIPT_NAME")) {
1.122 parser 310: size_t script_name_len=strlen(script_name);
311: size_t uri_len=strlen(request_info.uri);
312: if(strncmp(request_info.uri,script_name, script_name_len)==0 &&
313: script_name_len != uri_len) // under IIS they are the same
1.144 paf 314: SAPI::die("CGI: illegal call");
1.122 parser 315: }
316: } else
1.177 paf 317: request_info.uri="";
1.122 parser 318:
1.198 paf 319: request_info.content_type=SAPI::get_env(request_pool, "CONTENT_TYPE");
320: const char *content_length=SAPI::get_env(request_pool, "CONTENT_LENGTH");
1.122 parser 321: request_info.content_length=(content_length?atoi(content_length):0);
1.198 paf 322: request_info.cookie=SAPI::get_env(request_pool, "HTTP_COOKIE");
1.184 paf 323: request_info.mail_received=mail_received;
324:
1.198 paf 325:
1.122 parser 326: // prepare to process request
1.198 paf 327: Request request(request_pool,
1.122 parser 328: request_info,
1.184 paf 329: /*#ifdef _DEBUG
1.143 paf 330: String::UL_HTML|String::UL_OPTIMIZE_BIT
1.184 paf 331: #else*/
1.143 paf 332: cgi ? String::UL_HTML|String::UL_OPTIMIZE_BIT : String::UL_AS_IS
1.184 paf 333: /*#endif*/
1.143 paf 334: ,
1.130 paf 335: true /* status_allowed */);
1.201 ! paf 336:
! 337: // get request ptr for signal handlers
! 338: ::request=&request;
! 339: #ifdef SIGUSR1
! 340: if(signal(SIGUSR1, SIGUSR1_Handler)==SIG_ERR)
! 341: SAPI::die("Can not set handler for SIGUSR1");
! 342: #endif
! 343: #ifdef SIGPIPE
! 344: if(signal(SIGPIPE, SIGPIPE_Handler)==SIG_ERR)
! 345: SAPI::die("Can not set handler for SIGPIPE");
! 346: #endif
! 347:
1.181 paf 348: char config_filespec_buf[MAX_STRING];
1.193 paf 349: if(!config_filespec_cstr) {
350: const char *config_by_env=getenv(PARSER_CONFIG_ENV_NAME);
351: if(!config_by_env)
352: config_by_env=getenv(REDIRECT_PREFIX PARSER_CONFIG_ENV_NAME);
353: if(config_by_env)
354: config_filespec_cstr=config_by_env;
355: else {
356: // beside by binary
357: char beside_binary_path[MAX_STRING];
358: strncpy(beside_binary_path, argv0, MAX_STRING-1); beside_binary_path[MAX_STRING-1]=0; // filespec of my binary
359: if(!(
360: rsplit(beside_binary_path, '/') ||
361: rsplit(beside_binary_path, '\\'))) { // strip filename
362: // no path, just filename
363: // @todo full path, not ./!
364: beside_binary_path[0]='.'; beside_binary_path[1]=0;
365: }
366: snprintf(config_filespec_buf, MAX_STRING,
367: "%s/%s",
368: beside_binary_path, AUTO_FILE_NAME);
369: config_filespec_cstr=config_filespec_buf;
1.197 paf 370: fail_on_config_read_problem=entry_exists(config_filespec_cstr);
1.193 paf 371: }
1.122 parser 372: }
373:
374: // process the request
375: request.core(
1.193 paf 376: config_filespec_cstr, fail_on_config_read_problem,
1.122 parser 377: header_only);
1.201 ! paf 378:
! 379: // no request [prevent signal handlers from accessing invalid memory]
! 380: ::request=0;
1.122 parser 381:
382: //
383: done_socks();
384:
385: #ifdef DEBUG_POOL_MALLOC
386: extern void log_pool_stats(Pool& pool);
1.198 paf 387: log_pool_stats(request_pool);
1.122 parser 388: #endif
1.160 paf 389:
390: #ifdef DEBUG_STRING_APPENDS_VS_EXPANDS
1.198 paf 391: SAPI::log(global_pool,
1.161 paf 392: "string piece appends=%lu, wcontext_result_size=%lu, string_string_shortcut_economy_closer=%lu, total_alloc_size=%lu",
1.160 paf 393: string_piece_appends,
394: wcontext_result_size,
395: string_string_shortcut_economy,
396: total_alloc_size);
397: #endif
398:
1.122 parser 399: }
400:
1.184 paf 401: static void call_real_parser_handler__do_SEH(
1.122 parser 402: const char *filespec_to_process,
403: const char *request_method, bool header_only) {
1.133 paf 404: #if _MSC_VER && !defined(_DEBUG)
1.122 parser 405: LPEXCEPTION_POINTERS system_exception=0;
406: __try {
407: #endif
408: real_parser_handler(
409: filespec_to_process,
410: request_method, header_only);
411:
1.133 paf 412: #if _MSC_VER && !defined(_DEBUG)
1.122 parser 413: } __except (
414: (system_exception=GetExceptionInformation()),
415: EXCEPTION_EXECUTE_HANDLER) {
416:
417: if(system_exception)
418: if(_EXCEPTION_RECORD *er=system_exception->ExceptionRecord)
1.165 paf 419: throw Exception(0,
420: 0,
421: "Exception 0x%08X at 0x%08X", er->ExceptionCode, er->ExceptionAddress);
1.122 parser 422: else
1.165 paf 423: throw Exception(0, 0, "Exception <no exception record>");
1.122 parser 424: else
1.165 paf 425: throw Exception(0, 0, "Exception <no exception information>");
1.122 parser 426: }
427: #endif
428: }
429:
1.139 paf 430: #if _MSC_VER
1.135 paf 431: int failed_new(size_t size) {
432: SAPI::die("out of memory in 'new', failed to allocated %u bytes", size);
433: return 0; // not reached
1.131 paf 434: }
1.135 paf 435: #endif
1.131 paf 436:
1.135 paf 437: #ifdef HAVE_SET_NEW_HANDLER
1.184 paf 438: static void failed_new() {
1.135 paf 439: SAPI::die("out of memory in 'new'");
1.131 paf 440: }
441: #endif
442:
1.184 paf 443: static void usage(const char *program) {
1.188 paf 444: printf(
1.184 paf 445: "Parser/%s Copyright(c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com)\n"
446: "Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)\n"
447: "\n"
448: "Usage: %s [options] file\n"
449: "Options are:\n"
1.185 paf 450: #ifdef WITH_MAILRECEIVE
1.193 paf 451: " -m Parse mail, put received letter to $mail:received\n"
1.184 paf 452: #endif
1.193 paf 453: " -f config_file Use this config file (/path/to/auto.p)\n"
454: " -h Display usage information (this message)\n"
1.184 paf 455: , PARSER_VERSION,
456: program);
457: exit(EINVAL);
458: }
459:
1.195 paf 460: int main(int argc, char *argv[]) {
1.185 paf 461: #ifdef DEBUG_MAILRECEIVE
462: if(FILE *fake_in=fopen(DEBUG_MAILRECEIVE, "rt")) {
1.184 paf 463: dup2(fake_in->_file, 0/*STDIN_FILENO*/);
464: }
465: #endif
466:
1.178 paf 467: #ifdef _DEBUG
468: // _crtBreakAlloc=33112;
469: #endif
1.144 paf 470: // _asm int 3;
1.193 paf 471: argv0=argv[0];
1.45 paf 472:
1.32 paf 473: umask(2);
474:
1.3 paf 475: // were we started as CGI?
1.146 paf 476: cgi=
1.109 parser 477: getenv("SERVER_SOFTWARE") ||
478: getenv("SERVER_NAME") ||
479: getenv("GATEWAY_INTERFACE") ||
480: getenv("REQUEST_METHOD");
1.5 paf 481:
1.184 paf 482: char *raw_filespec_to_process;
483: if(cgi)
484: raw_filespec_to_process=getenv("PATH_TRANSLATED");
485: else {
486: optind = 1;
487: opterr = 0;
488: int c;
1.193 paf 489: while((c = getopt(argc, argv, "hf:"
1.185 paf 490: #ifdef WITH_MAILRECEIVE
1.184 paf 491: "m"
492: #endif
493: )) > 0) {
494: switch (c) {
495: case 'h':
496: usage(argv[0]);
1.193 paf 497: break;
498: case 'f':
499: config_filespec_cstr=optarg;
1.184 paf 500: break;
1.185 paf 501: #ifdef WITH_MAILRECEIVE
1.184 paf 502: case 'm':
503: mail_received=true;
504: break;
505: #endif
506: default:
507: fprintf(stderr, "%s: invalid option '%c'\n", argv[0], optopt);
508: usage(argv[0]);
509: break;
510: }
511: }
512: if (optind != argc - 1) {
513: fprintf(stderr, "%s: file not specified\n", argv[0]);
514: usage(argv[0]);
1.10 paf 515: }
1.184 paf 516:
517: raw_filespec_to_process=argv[optind++];
1.10 paf 518: }
519:
1.100 parser 520: #ifdef WIN32
521: setmode(fileno(stdin), _O_BINARY);
522: setmode(fileno(stdout), _O_BINARY);
523: setmode(fileno(stderr), _O_BINARY);
524: #endif
525:
1.139 paf 526: #if _MSC_VER
1.138 paf 527: _set_new_handler(failed_new);
1.148 paf 528:
529: #ifdef _DEBUG
530: // Get current flag
531: int tmpFlag = _CrtSetDbgFlag( _CRTDBG_REPORT_FLAG );
532:
533: // Turn on leak-checking bit
534: tmpFlag |= _CRTDBG_LEAK_CHECK_DF;
535:
536: // Set flag to the new value
537: _CrtSetDbgFlag( tmpFlag );
538: // _CrtSetBreakAlloc(471);
539:
540: #endif
541:
1.138 paf 542: #endif
543:
544: #ifdef HAVE_SET_NEW_HANDLER
545: std::set_new_handler(failed_new);
546: #endif
547:
1.166 paf 548: char filespec_to_process[MAX_STRING];
549: full_file_spec(raw_filespec_to_process, filespec_to_process, sizeof(filespec_to_process));
1.10 paf 550:
1.109 parser 551: const char *request_method=getenv("REQUEST_METHOD");
1.35 paf 552: bool header_only=request_method && strcasecmp(request_method, "HEAD")==0;
1.131 paf 553:
1.122 parser 554: try { // global try
555: call_real_parser_handler__do_SEH(
556: filespec_to_process,
557: request_method, header_only);
558: } catch(const Exception& e) { // global problem
1.44 paf 559: // don't allocate anything on pool here:
560: // possible pool' exception not catch-ed now
561: // and there could be out-of-memory exception
1.43 paf 562:
1.144 paf 563: SAPI::die("exception in request exception handler: %s", e.comment());
1.134 paf 564: #ifndef _DEBUG
1.131 paf 565: } catch(...) {
1.134 paf 566: SAPI::die("<unknown exception>");
1.133 paf 567: #endif
1.16 paf 568: }
1.122 parser 569:
1.109 parser 570:
571: #ifndef WIN32
572: //
573: if(!cgi)
1.198 paf 574: SAPI::send_body(global_pool, "\n", 1);
1.109 parser 575: #endif
1.156 paf 576: //_asm int 3;
1.134 paf 577: return 0;
1.1 paf 578: }
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