Annotation of parser3/src/targets/cgi/parser3.C, revision 1.182
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:
1.182 ! paf 7: $Id: parser3.C,v 1.181 2002/06/12 14:09:50 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>
1.3 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>
1.120 parser 27: #endif
28:
1.158 paf 29: //#define DEBUG_POOL_MALLOC
1.162 paf 30: //#define DEBUG_STRING_APPENDS_VS_EXPANDS
1.160 paf 31:
32: #ifdef DEBUG_STRING_APPENDS_VS_EXPANDS
33: extern ulong
34: string_piece_appends,
35: wcontext_result_size,
36: total_alloc_size,
37: string_string_shortcut_economy;
38: #endif
1.84 parser 39:
1.109 parser 40: // consts
1.113 parser 41:
1.174 paf 42: #ifndef _PROFILE
1.113 parser 43: extern const char *main_RCSIds[];
1.116 parser 44: #ifdef USE_SMTP
1.113 parser 45: extern const char *smtp_RCSIds[];
1.114 parser 46: #endif
1.113 parser 47: extern const char *gd_RCSIds[];
48: extern const char *classes_RCSIds[];
49: extern const char *types_RCSIds[];
1.115 parser 50: extern const char *parser3_RCSIds[];
1.113 parser 51: const char **RCSIds[]={
52: main_RCSIds,
1.116 parser 53: #ifdef USE_SMTP
1.113 parser 54: smtp_RCSIds,
1.114 parser 55: #endif
1.113 parser 56: gd_RCSIds,
57: classes_RCSIds,
58: types_RCSIds,
1.115 parser 59: parser3_RCSIds,
1.113 parser 60: 0
61: };
1.174 paf 62: #endif
1.84 parser 63:
1.175 paf 64: #define REDIRECT_PREFIX "REDIRECT_"
1.181 paf 65: #define PARSER_CONFIG_ENV_NAME "CGI_PARSER_CONFIG"
1.159 paf 66:
1.42 paf 67: /// IIS refuses to read bigger chunks
68: const size_t READ_POST_CHUNK_SIZE=0x400*0x400; // 1M
69:
1.45 paf 70: const char *argv0;
1.178 paf 71: Pool *pool; // global pool [dont describe to doxygen: it confuses it with param names]
1.27 paf 72: bool cgi; ///< we were started as CGI?
1.5 paf 73:
1.46 paf 74: // SAPI
1.86 parser 75:
1.124 parser 76: static void log(const char *fmt, va_list args) {
1.61 paf 77: bool opened;
78: FILE *f=0;
79:
80: if(argv0) {
81: // beside by binary
82: char file_spec[MAX_STRING];
1.98 parser 83: strncpy(file_spec, argv0, MAX_STRING-1); file_spec[MAX_STRING-1]=0; // filespec of my binary
1.61 paf 84: rsplit(file_spec, '/'); rsplit(file_spec, '\\');// strip filename
85: strcat(file_spec, "/parser3.log");
86: f=fopen(file_spec, "at");
87: }
88: opened=f!=0;
89: if(!opened)
90: f=stderr;
91:
92: // prefix
93: time_t t=time(0);
1.171 paf 94: if(const char *stamp=ctime(&t)) { // never saw that
1.173 paf 95: if(size_t len=strlen(stamp)) // saw once stamp being =""
1.172 paf 96: fprintf(f, "[%.*s] ", len-1, stamp);
1.171 paf 97: }
1.61 paf 98: // message
1.117 parser 99:
100: char buf[MAX_STRING];
101: size_t size=vsnprintf(buf, MAX_STRING, fmt, args);
102: remove_crlf(buf, buf+size);
103:
104: fwrite(buf, size, 1, f);
1.61 paf 105: // newline
106: fprintf(f, "\n");
107:
108: if(opened)
109: fclose(f);
1.85 parser 110: else
111: fflush(f);
1.124 parser 112: }
113:
114: // appends to parser3.log located beside my binary if openable, to stderr otherwize
115: void SAPI::log(Pool& , const char *fmt, ...) {
116: va_list args;
117: va_start(args,fmt);
118: ::log(fmt, args);
119: va_end(args);
120: }
121:
122: void SAPI::die(const char *fmt, ...) {
1.137 paf 123: #ifdef DEBUG_POOL_MALLOC
124: extern void log_pool_stats(Pool& pool);
1.178 paf 125: log_pool_stats(*pool);
1.137 paf 126: #endif
127:
1.144 paf 128: va_list args;
129: va_start(args,fmt);
1.138 paf 130: // log
131:
132: // logging is more important than user
133: // she can cancel download, we'd get SIG_PIPE,
134: // nothing would be logged then
1.124 parser 135: ::log(fmt, args);
136:
1.138 paf 137: // inform user
138:
1.134 paf 139: char body[MAX_STRING];
1.138 paf 140: int content_length=vsnprintf(body, MAX_STRING, fmt, args);
1.134 paf 141:
1.144 paf 142: va_end(args);
143:
1.134 paf 144: // prepare header
145: // let's be honest, that's bad we couldn't produce valid output
1.178 paf 146: SAPI::add_header_attribute(*pool, "status", "500");
147: SAPI::add_header_attribute(*pool, "content-type", "text/plain");
1.134 paf 148: char content_length_cstr[MAX_NUMBER];
1.168 paf 149: snprintf(content_length_cstr, sizeof(content_length_cstr), "%u", content_length);
1.178 paf 150: SAPI::add_header_attribute(*pool, "content-length", content_length_cstr);
1.134 paf 151:
152: // send header
1.178 paf 153: SAPI::send_header(*pool);
1.134 paf 154:
155: // body
1.178 paf 156: SAPI::send_body(*pool, body, content_length);
1.134 paf 157:
1.124 parser 158: exit(1);
1.61 paf 159: }
160:
1.122 parser 161: const char *SAPI::get_env(Pool& , const char *name) {
1.109 parser 162: return getenv(name);
1.28 paf 163: }
164:
1.180 paf 165: const char *const *SAPI::environment(Pool&) {
166: #ifdef _MSC_VER
167: extern char **_environ;
168: return _environ;
169: #else
170: extern char **environ;
171: return environ;
172: #endif
173: }
174:
1.122 parser 175: size_t SAPI::read_post(Pool& , char *buf, size_t max_bytes) {
1.59 paf 176: size_t read_size=0;
1.12 paf 177: do {
1.36 paf 178: int chunk_size=read(fileno(stdin),
1.42 paf 179: buf+read_size, min(READ_POST_CHUNK_SIZE, max_bytes-read_size));
1.129 paf 180: if(chunk_size<=0)
1.12 paf 181: break;
182: read_size+=chunk_size;
183: } while(read_size<max_bytes);
184:
185: return read_size;
1.10 paf 186: }
187:
1.122 parser 188: void SAPI::add_header_attribute(Pool& , const char *key, const char *value) {
1.68 paf 189: if(cgi)
1.20 paf 190: printf("%s: %s\n", key, value);
1.19 paf 191: }
192:
1.56 paf 193: /// @todo intelligent cache-control
1.122 parser 194: void SAPI::send_header(Pool& ) {
1.33 paf 195: if(cgi) {
1.147 paf 196: // puts("expires: Fri, 23 Mar 2001 09:32:23 GMT");
1.33 paf 197:
198: // header | body delimiter
1.20 paf 199: puts("");
1.33 paf 200: }
1.30 paf 201: }
1.20 paf 202:
1.122 parser 203: void SAPI::send_body(Pool& , const void *buf, size_t size) {
1.19 paf 204: stdout_write(buf, size);
1.58 paf 205: }
206:
1.97 parser 207: //
208:
1.166 paf 209: void full_file_spec(const char *file_name, char *buf, size_t buf_size) {
1.167 paf 210: if(file_name)
211: if(file_name[0]=='/'
212: #ifdef WIN32
213: || (file_name[0] && file_name[1]==':')
214: #endif
215: )
216: strncpy(buf, file_name, buf_size);
217: else {
218: char cwd[MAX_STRING]; getcwd(cwd, MAX_STRING);
219: snprintf(buf, buf_size, "%s/%s", cwd, file_name);
220: }
221: else
222: buf[0]=0;
1.166 paf 223: #ifdef WIN32
224: back_slashes_to_slashes(buf);
225: #endif
1.97 parser 226: }
227:
1.40 paf 228: /**
1.122 parser 229: main workhorse
1.19 paf 230:
1.122 parser 231: @todo
1.40 paf 232: IIS: remove trailing default-document[index.html] from $request.uri.
233: to do that we need to consult metabase,
234: wich is tested but seems slow.
1.144 paf 235: IIS5 todo find out proper 'illegal call' check
1.40 paf 236: */
1.122 parser 237: void real_parser_handler(
238: const char *filespec_to_process,
239: const char *request_method, bool header_only) {
240: // init socks
1.178 paf 241: init_socks(*pool);
1.122 parser 242:
243: // init global classes
1.178 paf 244: init_methoded_array(*pool);
1.122 parser 245: // init global variables
1.178 paf 246: pa_globals_init(*pool);
1.122 parser 247:
248: if(!filespec_to_process)
1.144 paf 249: SAPI::die("Parser/%s", PARSER_VERSION);
1.122 parser 250:
251: // Request info
252: Request::Info request_info;
1.166 paf 253: char document_root_buf[MAX_STRING];
1.122 parser 254: if(cgi) {
1.178 paf 255: if(const char *env_document_root=SAPI::get_env(*pool, "DOCUMENT_ROOT"))
1.122 parser 256: request_info.document_root=env_document_root;
1.178 paf 257: else if(const char *path_info=SAPI::get_env(*pool, "PATH_INFO")) {
1.122 parser 258: // IIS
1.166 paf 259: size_t len=min(sizeof(document_root_buf)-1, strlen(filespec_to_process)-strlen(path_info));
260: memcpy(document_root_buf, filespec_to_process, len); document_root_buf[len]=0;
261: request_info.document_root=document_root_buf;
1.122 parser 262: } else
1.165 paf 263: throw Exception("parser.runtime",
264: 0,
265: "CGI: no PATH_INFO defined(in reinventing DOCUMENT_ROOT)");
1.122 parser 266: } else {
1.166 paf 267: full_file_spec("", document_root_buf, sizeof(document_root_buf));
268: request_info.document_root=document_root_buf;
1.122 parser 269: }
270: request_info.path_translated=filespec_to_process;
271: request_info.method=request_method ? request_method : "GET";
1.178 paf 272: const char *query_string=SAPI::get_env(*pool, "QUERY_STRING");
1.122 parser 273: request_info.query_string=query_string;
274: if(cgi) {
1.178 paf 275: if(const char *env_request_uri=SAPI::get_env(*pool, "REQUEST_URI"))
1.122 parser 276: request_info.uri=env_request_uri;
1.178 paf 277: else if(const char *path_info=SAPI::get_env(*pool, "PATH_INFO"))
1.122 parser 278: if(query_string) {
1.178 paf 279: char *reconstructed_uri=(char *)pool->malloc(
1.122 parser 280: strlen(path_info)+1/*'?'*/+
281: strlen(query_string)+1/*0*/);
282: strcpy(reconstructed_uri, path_info);
283: strcat(reconstructed_uri, "?");
284: strcat(reconstructed_uri, query_string);
285: request_info.uri=reconstructed_uri;
286: } else
287: request_info.uri=path_info;
1.179 paf 288: else
289: throw Exception("parser.runtime",
290: 0,
291: "CGI: no PATH_INFO defined(in reinventing REQUEST_URI)");
1.145 paf 292:
293: #ifndef WIN32
294: // they've changed this under IIS5.
1.178 paf 295: if(const char *script_name=SAPI::get_env(*pool, "SCRIPT_NAME")) {
1.122 parser 296: size_t script_name_len=strlen(script_name);
297: size_t uri_len=strlen(request_info.uri);
298: if(strncmp(request_info.uri,script_name, script_name_len)==0 &&
299: script_name_len != uri_len) // under IIS they are the same
1.144 paf 300: SAPI::die("CGI: illegal call");
1.122 parser 301: }
1.145 paf 302: #endif
1.122 parser 303: } else
1.177 paf 304: request_info.uri="";
1.122 parser 305:
1.178 paf 306: request_info.content_type=SAPI::get_env(*pool, "CONTENT_TYPE");
307: const char *content_length=SAPI::get_env(*pool, "CONTENT_LENGTH");
1.122 parser 308: request_info.content_length=(content_length?atoi(content_length):0);
1.178 paf 309: request_info.cookie=SAPI::get_env(*pool, "HTTP_COOKIE");
1.122 parser 310:
311: // prepare to process request
1.178 paf 312: Request request(*pool,
1.122 parser 313: request_info,
1.143 paf 314: #ifdef _DEBUG
315: String::UL_HTML|String::UL_OPTIMIZE_BIT
316: #else
317: cgi ? String::UL_HTML|String::UL_OPTIMIZE_BIT : String::UL_AS_IS
318: #endif
319: ,
1.130 paf 320: true /* status_allowed */);
1.122 parser 321:
1.181 paf 322: const char *config_filespec_cstr;
323: char config_filespec_buf[MAX_STRING];
324: const char *config_by_env=getenv(PARSER_CONFIG_ENV_NAME);
325: if(!config_by_env)
326: config_by_env=getenv(REDIRECT_PREFIX PARSER_CONFIG_ENV_NAME);
327: if(config_by_env)
328: config_filespec_cstr=config_by_env;
1.164 paf 329: else {
1.122 parser 330: // beside by binary
331: // @todo full path, not ./!
1.164 paf 332: char beside_binary_path[MAX_STRING];
333: strncpy(beside_binary_path, argv0, MAX_STRING-1); beside_binary_path[MAX_STRING-1]=0; // filespec of my binary
334: if(!(
335: rsplit(beside_binary_path, '/') ||
336: rsplit(beside_binary_path, '\\'))) { // strip filename
337: // no path, just filename
338: beside_binary_path[0]='.'; beside_binary_path[1]=0;
339: }
1.181 paf 340: snprintf(config_filespec_buf, MAX_STRING,
1.164 paf 341: "%s/%s",
342: beside_binary_path, CONFIG_FILE_NAME);
1.181 paf 343: config_filespec_cstr=config_filespec_buf;
1.122 parser 344: }
345:
346: // process the request
347: request.core(
1.181 paf 348: config_filespec_cstr, false /*fail_on_read_problem*/,
1.122 parser 349: header_only);
350:
351: //
352: done_socks();
353:
354: #ifdef DEBUG_POOL_MALLOC
355: extern void log_pool_stats(Pool& pool);
1.178 paf 356: log_pool_stats(*pool);
1.122 parser 357: #endif
1.160 paf 358:
359: #ifdef DEBUG_STRING_APPENDS_VS_EXPANDS
1.178 paf 360: SAPI::log(*pool,
1.161 paf 361: "string piece appends=%lu, wcontext_result_size=%lu, string_string_shortcut_economy_closer=%lu, total_alloc_size=%lu",
1.160 paf 362: string_piece_appends,
363: wcontext_result_size,
364: string_string_shortcut_economy,
365: total_alloc_size);
366: #endif
367:
1.122 parser 368: }
369:
370: void call_real_parser_handler__do_SEH(
371: const char *filespec_to_process,
372: const char *request_method, bool header_only) {
1.133 paf 373: #if _MSC_VER && !defined(_DEBUG)
1.122 parser 374: LPEXCEPTION_POINTERS system_exception=0;
375: __try {
376: #endif
377: real_parser_handler(
378: filespec_to_process,
379: request_method, header_only);
380:
1.133 paf 381: #if _MSC_VER && !defined(_DEBUG)
1.122 parser 382: } __except (
383: (system_exception=GetExceptionInformation()),
384: EXCEPTION_EXECUTE_HANDLER) {
385:
386: if(system_exception)
387: if(_EXCEPTION_RECORD *er=system_exception->ExceptionRecord)
1.165 paf 388: throw Exception(0,
389: 0,
390: "Exception 0x%08X at 0x%08X", er->ExceptionCode, er->ExceptionAddress);
1.122 parser 391: else
1.165 paf 392: throw Exception(0, 0, "Exception <no exception record>");
1.122 parser 393: else
1.165 paf 394: throw Exception(0, 0, "Exception <no exception information>");
1.122 parser 395: }
396: #endif
397: }
398:
1.139 paf 399: #if _MSC_VER
1.135 paf 400: int failed_new(size_t size) {
401: SAPI::die("out of memory in 'new', failed to allocated %u bytes", size);
402: return 0; // not reached
1.131 paf 403: }
1.135 paf 404: #endif
1.131 paf 405:
1.135 paf 406: #ifdef HAVE_SET_NEW_HANDLER
1.134 paf 407: void failed_new() {
1.135 paf 408: SAPI::die("out of memory in 'new'");
1.131 paf 409: }
410: #endif
411:
1.5 paf 412: int main(int argc, char *argv[]) {
1.178 paf 413: Pool_storage global_pool_storage;
414: Pool global_pool(&global_pool_storage);
415: pool=&global_pool;
416:
417: #ifdef _DEBUG
418: // _crtBreakAlloc=33112;
419: #endif
1.144 paf 420: // _asm int 3;
1.45 paf 421: argv0=argv[0];
422:
1.32 paf 423: umask(2);
424:
1.3 paf 425: // were we started as CGI?
1.146 paf 426: cgi=
1.109 parser 427: getenv("SERVER_SOFTWARE") ||
428: getenv("SERVER_NAME") ||
429: getenv("GATEWAY_INTERFACE") ||
430: getenv("REQUEST_METHOD");
1.5 paf 431:
1.10 paf 432: if(!cgi) {
433: if(argc<2) {
1.69 paf 434: printf(
1.155 paf 435: "Parser/%s Copyright(c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com)\n"
1.154 paf 436: "Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)\n"
1.100 parser 437: "\n"
438: "Usage: %s <file>\n",
1.69 paf 439: PARSER_VERSION,
440: argv0?argv0:"parser3");
1.67 paf 441: return 1;
1.10 paf 442: }
443: }
444:
1.100 parser 445: #ifdef WIN32
446: setmode(fileno(stdin), _O_BINARY);
447: setmode(fileno(stdout), _O_BINARY);
448: setmode(fileno(stderr), _O_BINARY);
449: #endif
450:
1.139 paf 451: #if _MSC_VER
1.138 paf 452: _set_new_handler(failed_new);
1.148 paf 453:
454: #ifdef _DEBUG
455: // Get current flag
456: int tmpFlag = _CrtSetDbgFlag( _CRTDBG_REPORT_FLAG );
457:
458: // Turn on leak-checking bit
459: tmpFlag |= _CRTDBG_LEAK_CHECK_DF;
460:
461: // Set flag to the new value
462: _CrtSetDbgFlag( tmpFlag );
463: // _CrtSetBreakAlloc(471);
464:
465: #endif
466:
1.138 paf 467: #endif
468:
469: #ifdef HAVE_SET_NEW_HANDLER
470: std::set_new_handler(failed_new);
471: #endif
472:
1.166 paf 473: char *raw_filespec_to_process=cgi?getenv("PATH_TRANSLATED"):argv[1];
474: char filespec_to_process[MAX_STRING];
475: full_file_spec(raw_filespec_to_process, filespec_to_process, sizeof(filespec_to_process));
1.10 paf 476:
1.109 parser 477: const char *request_method=getenv("REQUEST_METHOD");
1.35 paf 478: bool header_only=request_method && strcasecmp(request_method, "HEAD")==0;
1.131 paf 479:
1.122 parser 480: try { // global try
481: call_real_parser_handler__do_SEH(
482: filespec_to_process,
483: request_method, header_only);
484: } catch(const Exception& e) { // global problem
1.44 paf 485: // don't allocate anything on pool here:
486: // possible pool' exception not catch-ed now
487: // and there could be out-of-memory exception
1.43 paf 488:
1.144 paf 489: SAPI::die("exception in request exception handler: %s", e.comment());
1.134 paf 490: #ifndef _DEBUG
1.131 paf 491: } catch(...) {
1.134 paf 492: SAPI::die("<unknown exception>");
1.133 paf 493: #endif
1.16 paf 494: }
1.122 parser 495:
1.109 parser 496:
497: #ifndef WIN32
498: //
499: if(!cgi)
1.178 paf 500: SAPI::send_body(*pool, "\n", 1);
1.109 parser 501: #endif
1.156 paf 502: //_asm int 3;
1.134 paf 503: return 0;
1.1 paf 504: }
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