Annotation of parser3/src/targets/cgi/parser3.C, revision 1.181
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)
1.27 paf 6:
1.181 ! paf 7: $Id: parser3.C,v 1.180 2002/06/11 12:20:42 paf Exp $
1.1 paf 8: */
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>
1.151 paf 15: #else
16: # include "pa_config_paths.h"
1.3 paf 17: #endif
1.27 paf 18:
1.37 paf 19: #include "pa_sapi.h"
1.76 paf 20: #include "classes.h"
1.24 paf 21: #include "pa_common.h"
1.2 paf 22: #include "pa_request.h"
1.57 paf 23: #include "pa_socks.h"
1.68 paf 24: #include "pa_version.h"
1.125 parser 25: #include "pool_storage.h"
1.69 paf 26:
1.149 paf 27: #ifdef WIN32
28: # include <windows.h>
1.120 parser 29: #endif
30:
1.158 paf 31: //#define DEBUG_POOL_MALLOC
1.162 paf 32: //#define DEBUG_STRING_APPENDS_VS_EXPANDS
1.160 paf 33:
34: #ifdef DEBUG_STRING_APPENDS_VS_EXPANDS
35: extern ulong
36: string_piece_appends,
37: wcontext_result_size,
38: total_alloc_size,
39: string_string_shortcut_economy;
40: #endif
1.84 parser 41:
1.109 parser 42: // consts
1.113 parser 43:
1.174 paf 44: #ifndef _PROFILE
1.113 parser 45: extern const char *main_RCSIds[];
1.116 parser 46: #ifdef USE_SMTP
1.113 parser 47: extern const char *smtp_RCSIds[];
1.114 parser 48: #endif
1.113 parser 49: extern const char *gd_RCSIds[];
50: extern const char *classes_RCSIds[];
51: extern const char *types_RCSIds[];
1.115 parser 52: extern const char *parser3_RCSIds[];
1.113 parser 53: const char **RCSIds[]={
54: main_RCSIds,
1.116 parser 55: #ifdef USE_SMTP
1.113 parser 56: smtp_RCSIds,
1.114 parser 57: #endif
1.113 parser 58: gd_RCSIds,
59: classes_RCSIds,
60: types_RCSIds,
1.115 parser 61: parser3_RCSIds,
1.113 parser 62: 0
63: };
1.174 paf 64: #endif
1.84 parser 65:
1.175 paf 66: #define REDIRECT_PREFIX "REDIRECT_"
1.181 ! paf 67: #define PARSER_CONFIG_ENV_NAME "CGI_PARSER_CONFIG"
1.159 paf 68:
1.42 paf 69: /// IIS refuses to read bigger chunks
70: const size_t READ_POST_CHUNK_SIZE=0x400*0x400; // 1M
71:
1.45 paf 72: const char *argv0;
1.178 paf 73: Pool *pool; // global pool [dont describe to doxygen: it confuses it with param names]
1.27 paf 74: bool cgi; ///< we were started as CGI?
1.5 paf 75:
1.46 paf 76: // SAPI
1.86 parser 77:
1.124 parser 78: static void log(const char *fmt, va_list args) {
1.61 paf 79: bool opened;
80: FILE *f=0;
81:
82: if(argv0) {
83: // beside by binary
84: char file_spec[MAX_STRING];
1.98 parser 85: strncpy(file_spec, argv0, MAX_STRING-1); file_spec[MAX_STRING-1]=0; // filespec of my binary
1.61 paf 86: rsplit(file_spec, '/'); rsplit(file_spec, '\\');// strip filename
87: strcat(file_spec, "/parser3.log");
88: f=fopen(file_spec, "at");
89: }
90: opened=f!=0;
91: if(!opened)
92: f=stderr;
93:
94: // prefix
95: time_t t=time(0);
1.171 paf 96: if(const char *stamp=ctime(&t)) { // never saw that
1.173 paf 97: if(size_t len=strlen(stamp)) // saw once stamp being =""
1.172 paf 98: fprintf(f, "[%.*s] ", len-1, stamp);
1.171 paf 99: }
1.61 paf 100: // message
1.117 parser 101:
102: char buf[MAX_STRING];
103: size_t size=vsnprintf(buf, MAX_STRING, fmt, args);
104: remove_crlf(buf, buf+size);
105:
106: fwrite(buf, size, 1, f);
1.61 paf 107: // newline
108: fprintf(f, "\n");
109:
110: if(opened)
111: fclose(f);
1.85 parser 112: else
113: fflush(f);
1.124 parser 114: }
115:
116: // appends to parser3.log located beside my binary if openable, to stderr otherwize
117: void SAPI::log(Pool& , const char *fmt, ...) {
118: va_list args;
119: va_start(args,fmt);
120: ::log(fmt, args);
121: va_end(args);
122: }
123:
124: void SAPI::die(const char *fmt, ...) {
1.137 paf 125: #ifdef DEBUG_POOL_MALLOC
126: extern void log_pool_stats(Pool& pool);
1.178 paf 127: log_pool_stats(*pool);
1.137 paf 128: #endif
129:
1.144 paf 130: va_list args;
131: va_start(args,fmt);
1.138 paf 132: // log
133:
134: // logging is more important than user
135: // she can cancel download, we'd get SIG_PIPE,
136: // nothing would be logged then
1.124 parser 137: ::log(fmt, args);
138:
1.138 paf 139: // inform user
140:
1.134 paf 141: char body[MAX_STRING];
1.138 paf 142: int content_length=vsnprintf(body, MAX_STRING, fmt, args);
1.134 paf 143:
1.144 paf 144: va_end(args);
145:
1.134 paf 146: // prepare header
147: // let's be honest, that's bad we couldn't produce valid output
1.178 paf 148: SAPI::add_header_attribute(*pool, "status", "500");
149: SAPI::add_header_attribute(*pool, "content-type", "text/plain");
1.134 paf 150: char content_length_cstr[MAX_NUMBER];
1.168 paf 151: snprintf(content_length_cstr, sizeof(content_length_cstr), "%u", content_length);
1.178 paf 152: SAPI::add_header_attribute(*pool, "content-length", content_length_cstr);
1.134 paf 153:
154: // send header
1.178 paf 155: SAPI::send_header(*pool);
1.134 paf 156:
157: // body
1.178 paf 158: SAPI::send_body(*pool, body, content_length);
1.134 paf 159:
1.124 parser 160: exit(1);
1.61 paf 161: }
162:
1.122 parser 163: const char *SAPI::get_env(Pool& , const char *name) {
1.109 parser 164: return getenv(name);
1.28 paf 165: }
166:
1.180 paf 167: const char *const *SAPI::environment(Pool&) {
168: #ifdef _MSC_VER
169: extern char **_environ;
170: return _environ;
171: #else
172: extern char **environ;
173: return environ;
174: #endif
175: }
176:
1.122 parser 177: size_t SAPI::read_post(Pool& , char *buf, size_t max_bytes) {
1.59 paf 178: size_t read_size=0;
1.12 paf 179: do {
1.36 paf 180: int chunk_size=read(fileno(stdin),
1.42 paf 181: buf+read_size, min(READ_POST_CHUNK_SIZE, max_bytes-read_size));
1.129 paf 182: if(chunk_size<=0)
1.12 paf 183: break;
184: read_size+=chunk_size;
185: } while(read_size<max_bytes);
186:
187: return read_size;
1.10 paf 188: }
189:
1.122 parser 190: void SAPI::add_header_attribute(Pool& , const char *key, const char *value) {
1.68 paf 191: if(cgi)
1.20 paf 192: printf("%s: %s\n", key, value);
1.19 paf 193: }
194:
1.56 paf 195: /// @todo intelligent cache-control
1.122 parser 196: void SAPI::send_header(Pool& ) {
1.33 paf 197: if(cgi) {
1.147 paf 198: // puts("expires: Fri, 23 Mar 2001 09:32:23 GMT");
1.33 paf 199:
200: // header | body delimiter
1.20 paf 201: puts("");
1.33 paf 202: }
1.30 paf 203: }
1.20 paf 204:
1.122 parser 205: void SAPI::send_body(Pool& , const void *buf, size_t size) {
1.19 paf 206: stdout_write(buf, size);
1.58 paf 207: }
208:
1.97 parser 209: //
210:
1.166 paf 211: void full_file_spec(const char *file_name, char *buf, size_t buf_size) {
1.167 paf 212: if(file_name)
213: if(file_name[0]=='/'
214: #ifdef WIN32
215: || (file_name[0] && file_name[1]==':')
216: #endif
217: )
218: strncpy(buf, file_name, buf_size);
219: else {
220: char cwd[MAX_STRING]; getcwd(cwd, MAX_STRING);
221: snprintf(buf, buf_size, "%s/%s", cwd, file_name);
222: }
223: else
224: buf[0]=0;
1.166 paf 225: #ifdef WIN32
226: back_slashes_to_slashes(buf);
227: #endif
1.97 parser 228: }
229:
1.40 paf 230: /**
1.122 parser 231: main workhorse
1.19 paf 232:
1.122 parser 233: @todo
1.40 paf 234: IIS: remove trailing default-document[index.html] from $request.uri.
235: to do that we need to consult metabase,
236: wich is tested but seems slow.
1.144 paf 237: IIS5 todo find out proper 'illegal call' check
1.40 paf 238: */
1.122 parser 239: void real_parser_handler(
240: const char *filespec_to_process,
241: const char *request_method, bool header_only) {
242: // init socks
1.178 paf 243: init_socks(*pool);
1.122 parser 244:
245: // init global classes
1.178 paf 246: init_methoded_array(*pool);
1.122 parser 247: // init global variables
1.178 paf 248: pa_globals_init(*pool);
1.122 parser 249:
250: if(!filespec_to_process)
1.144 paf 251: SAPI::die("Parser/%s", PARSER_VERSION);
1.122 parser 252:
253: // Request info
254: Request::Info request_info;
1.166 paf 255: char document_root_buf[MAX_STRING];
1.122 parser 256: if(cgi) {
1.178 paf 257: if(const char *env_document_root=SAPI::get_env(*pool, "DOCUMENT_ROOT"))
1.122 parser 258: request_info.document_root=env_document_root;
1.178 paf 259: else if(const char *path_info=SAPI::get_env(*pool, "PATH_INFO")) {
1.122 parser 260: // IIS
1.166 paf 261: size_t len=min(sizeof(document_root_buf)-1, strlen(filespec_to_process)-strlen(path_info));
262: memcpy(document_root_buf, filespec_to_process, len); document_root_buf[len]=0;
263: request_info.document_root=document_root_buf;
1.122 parser 264: } else
1.165 paf 265: throw Exception("parser.runtime",
266: 0,
267: "CGI: no PATH_INFO defined(in reinventing DOCUMENT_ROOT)");
1.122 parser 268: } else {
1.166 paf 269: full_file_spec("", document_root_buf, sizeof(document_root_buf));
270: request_info.document_root=document_root_buf;
1.122 parser 271: }
272: request_info.path_translated=filespec_to_process;
273: request_info.method=request_method ? request_method : "GET";
1.178 paf 274: const char *query_string=SAPI::get_env(*pool, "QUERY_STRING");
1.122 parser 275: request_info.query_string=query_string;
276: if(cgi) {
1.178 paf 277: if(const char *env_request_uri=SAPI::get_env(*pool, "REQUEST_URI"))
1.122 parser 278: request_info.uri=env_request_uri;
1.178 paf 279: else if(const char *path_info=SAPI::get_env(*pool, "PATH_INFO"))
1.122 parser 280: if(query_string) {
1.178 paf 281: char *reconstructed_uri=(char *)pool->malloc(
1.122 parser 282: strlen(path_info)+1/*'?'*/+
283: strlen(query_string)+1/*0*/);
284: strcpy(reconstructed_uri, path_info);
285: strcat(reconstructed_uri, "?");
286: strcat(reconstructed_uri, query_string);
287: request_info.uri=reconstructed_uri;
288: } else
289: request_info.uri=path_info;
1.179 paf 290: else
291: throw Exception("parser.runtime",
292: 0,
293: "CGI: no PATH_INFO defined(in reinventing REQUEST_URI)");
1.145 paf 294:
295: #ifndef WIN32
296: // they've changed this under IIS5.
1.178 paf 297: if(const char *script_name=SAPI::get_env(*pool, "SCRIPT_NAME")) {
1.122 parser 298: size_t script_name_len=strlen(script_name);
299: size_t uri_len=strlen(request_info.uri);
300: if(strncmp(request_info.uri,script_name, script_name_len)==0 &&
301: script_name_len != uri_len) // under IIS they are the same
1.144 paf 302: SAPI::die("CGI: illegal call");
1.122 parser 303: }
1.145 paf 304: #endif
1.122 parser 305: } else
1.177 paf 306: request_info.uri="";
1.122 parser 307:
1.178 paf 308: request_info.content_type=SAPI::get_env(*pool, "CONTENT_TYPE");
309: const char *content_length=SAPI::get_env(*pool, "CONTENT_LENGTH");
1.122 parser 310: request_info.content_length=(content_length?atoi(content_length):0);
1.178 paf 311: request_info.cookie=SAPI::get_env(*pool, "HTTP_COOKIE");
1.122 parser 312:
313: // prepare to process request
1.178 paf 314: Request request(*pool,
1.122 parser 315: request_info,
1.143 paf 316: #ifdef _DEBUG
317: String::UL_HTML|String::UL_OPTIMIZE_BIT
318: #else
319: cgi ? String::UL_HTML|String::UL_OPTIMIZE_BIT : String::UL_AS_IS
320: #endif
321: ,
1.130 paf 322: true /* status_allowed */);
1.122 parser 323:
1.181 ! paf 324: const char *config_filespec_cstr;
! 325: char config_filespec_buf[MAX_STRING];
! 326: const char *config_by_env=getenv(PARSER_CONFIG_ENV_NAME);
! 327: if(!config_by_env)
! 328: config_by_env=getenv(REDIRECT_PREFIX PARSER_CONFIG_ENV_NAME);
! 329: if(config_by_env)
! 330: config_filespec_cstr=config_by_env;
1.164 paf 331: else {
1.122 parser 332: // beside by binary
333: // @todo full path, not ./!
1.164 paf 334: char beside_binary_path[MAX_STRING];
335: strncpy(beside_binary_path, argv0, MAX_STRING-1); beside_binary_path[MAX_STRING-1]=0; // filespec of my binary
336: if(!(
337: rsplit(beside_binary_path, '/') ||
338: rsplit(beside_binary_path, '\\'))) { // strip filename
339: // no path, just filename
340: beside_binary_path[0]='.'; beside_binary_path[1]=0;
341: }
1.181 ! paf 342: snprintf(config_filespec_buf, MAX_STRING,
1.164 paf 343: "%s/%s",
344: beside_binary_path, CONFIG_FILE_NAME);
1.181 ! paf 345: config_filespec_cstr=config_filespec_buf;
1.122 parser 346: }
347:
348: // process the request
349: request.core(
1.181 ! paf 350: config_filespec_cstr, false /*fail_on_read_problem*/,
1.122 parser 351: header_only);
352:
353: //
354: done_socks();
355:
356: #ifdef DEBUG_POOL_MALLOC
357: extern void log_pool_stats(Pool& pool);
1.178 paf 358: log_pool_stats(*pool);
1.122 parser 359: #endif
1.160 paf 360:
361: #ifdef DEBUG_STRING_APPENDS_VS_EXPANDS
1.178 paf 362: SAPI::log(*pool,
1.161 paf 363: "string piece appends=%lu, wcontext_result_size=%lu, string_string_shortcut_economy_closer=%lu, total_alloc_size=%lu",
1.160 paf 364: string_piece_appends,
365: wcontext_result_size,
366: string_string_shortcut_economy,
367: total_alloc_size);
368: #endif
369:
1.122 parser 370: }
371:
372: void call_real_parser_handler__do_SEH(
373: const char *filespec_to_process,
374: const char *request_method, bool header_only) {
1.133 paf 375: #if _MSC_VER && !defined(_DEBUG)
1.122 parser 376: LPEXCEPTION_POINTERS system_exception=0;
377: __try {
378: #endif
379: real_parser_handler(
380: filespec_to_process,
381: request_method, header_only);
382:
1.133 paf 383: #if _MSC_VER && !defined(_DEBUG)
1.122 parser 384: } __except (
385: (system_exception=GetExceptionInformation()),
386: EXCEPTION_EXECUTE_HANDLER) {
387:
388: if(system_exception)
389: if(_EXCEPTION_RECORD *er=system_exception->ExceptionRecord)
1.165 paf 390: throw Exception(0,
391: 0,
392: "Exception 0x%08X at 0x%08X", er->ExceptionCode, er->ExceptionAddress);
1.122 parser 393: else
1.165 paf 394: throw Exception(0, 0, "Exception <no exception record>");
1.122 parser 395: else
1.165 paf 396: throw Exception(0, 0, "Exception <no exception information>");
1.122 parser 397: }
398: #endif
399: }
400:
1.139 paf 401: #if _MSC_VER
1.135 paf 402: int failed_new(size_t size) {
403: SAPI::die("out of memory in 'new', failed to allocated %u bytes", size);
404: return 0; // not reached
1.131 paf 405: }
1.135 paf 406: #endif
1.131 paf 407:
1.135 paf 408: #ifdef HAVE_SET_NEW_HANDLER
1.134 paf 409: void failed_new() {
1.135 paf 410: SAPI::die("out of memory in 'new'");
1.131 paf 411: }
412: #endif
413:
1.5 paf 414: int main(int argc, char *argv[]) {
1.178 paf 415: Pool_storage global_pool_storage;
416: Pool global_pool(&global_pool_storage);
417: pool=&global_pool;
418:
419: #ifdef _DEBUG
420: // _crtBreakAlloc=33112;
421: #endif
1.144 paf 422: // _asm int 3;
1.45 paf 423: argv0=argv[0];
424:
1.32 paf 425: umask(2);
426:
1.3 paf 427: // were we started as CGI?
1.146 paf 428: cgi=
1.109 parser 429: getenv("SERVER_SOFTWARE") ||
430: getenv("SERVER_NAME") ||
431: getenv("GATEWAY_INTERFACE") ||
432: getenv("REQUEST_METHOD");
1.5 paf 433:
1.10 paf 434: if(!cgi) {
435: if(argc<2) {
1.69 paf 436: printf(
1.155 paf 437: "Parser/%s Copyright(c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com)\n"
1.154 paf 438: "Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)\n"
1.100 parser 439: "\n"
440: "Usage: %s <file>\n",
1.69 paf 441: PARSER_VERSION,
442: argv0?argv0:"parser3");
1.67 paf 443: return 1;
1.10 paf 444: }
445: }
446:
1.100 parser 447: #ifdef WIN32
448: setmode(fileno(stdin), _O_BINARY);
449: setmode(fileno(stdout), _O_BINARY);
450: setmode(fileno(stderr), _O_BINARY);
451: #endif
452:
1.139 paf 453: #if _MSC_VER
1.138 paf 454: _set_new_handler(failed_new);
1.148 paf 455:
456: #ifdef _DEBUG
457: // Get current flag
458: int tmpFlag = _CrtSetDbgFlag( _CRTDBG_REPORT_FLAG );
459:
460: // Turn on leak-checking bit
461: tmpFlag |= _CRTDBG_LEAK_CHECK_DF;
462:
463: // Set flag to the new value
464: _CrtSetDbgFlag( tmpFlag );
465: // _CrtSetBreakAlloc(471);
466:
467: #endif
468:
1.138 paf 469: #endif
470:
471: #ifdef HAVE_SET_NEW_HANDLER
472: std::set_new_handler(failed_new);
473: #endif
474:
1.166 paf 475: char *raw_filespec_to_process=cgi?getenv("PATH_TRANSLATED"):argv[1];
476: char filespec_to_process[MAX_STRING];
477: full_file_spec(raw_filespec_to_process, filespec_to_process, sizeof(filespec_to_process));
1.10 paf 478:
1.109 parser 479: const char *request_method=getenv("REQUEST_METHOD");
1.35 paf 480: bool header_only=request_method && strcasecmp(request_method, "HEAD")==0;
1.131 paf 481:
1.122 parser 482: try { // global try
483: call_real_parser_handler__do_SEH(
484: filespec_to_process,
485: request_method, header_only);
486: } catch(const Exception& e) { // global problem
1.44 paf 487: // don't allocate anything on pool here:
488: // possible pool' exception not catch-ed now
489: // and there could be out-of-memory exception
1.43 paf 490:
1.144 paf 491: SAPI::die("exception in request exception handler: %s", e.comment());
1.134 paf 492: #ifndef _DEBUG
1.131 paf 493: } catch(...) {
1.134 paf 494: SAPI::die("<unknown exception>");
1.133 paf 495: #endif
1.16 paf 496: }
1.122 parser 497:
1.109 parser 498:
499: #ifndef WIN32
500: //
501: if(!cgi)
1.178 paf 502: SAPI::send_body(*pool, "\n", 1);
1.109 parser 503: #endif
1.156 paf 504: //_asm int 3;
1.134 paf 505: return 0;
1.1 paf 506: }
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