Annotation of parser3/src/classes/op.C, revision 1.197
1.1 paf 1: /** @file
1.9 paf 2: Parser: parser @b operators.
1.1 paf 3:
1.184 misha 4: Copyright (c) 2001-2009 ArtLebedev Group (http://www.artlebedev.com)
1.71 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.98 paf 6: */
1.1 paf 7:
1.197 ! misha 8: static const char * const IDENT_OP_C="$Date: 2009-07-29 05:01:33 $";
1.1 paf 9:
1.13 paf 10: #include "classes.h"
1.129 paf 11: #include "pa_vmethod_frame.h"
12:
1.1 paf 13: #include "pa_common.h"
1.134 paf 14: #include "pa_os.h"
1.1 paf 15: #include "pa_request.h"
16: #include "pa_vint.h"
17: #include "pa_sql_connection.h"
1.79 paf 18: #include "pa_vdate.h"
1.105 paf 19: #include "pa_vmethod_frame.h"
1.129 paf 20: #include "pa_vclass.h"
1.144 paf 21: #include "pa_charset.h"
1.1 paf 22:
1.18 parser 23: // limits
24:
1.162 paf 25: #define MAX_LOOPS 20000
1.18 parser 26:
1.10 paf 27: // defines
28:
1.82 paf 29: #define CASE_DEFAULT_VALUE "DEFAULT"
1.146 paf 30: #define PROCESS_MAIN_OPTION_NAME "main"
31: #define PROCESS_FILE_OPTION_NAME "file"
32: #define PROCESS_LINENO_OPTION_NAME "lineno"
1.11 paf 33:
1.10 paf 34: // class
35:
1.113 paf 36: class VClassMAIN: public VClass {
1.10 paf 37: public:
1.129 paf 38: VClassMAIN();
1.10 paf 39: };
40:
1.129 paf 41: // defines for statics
42:
43: #define SWITCH_DATA_NAME "SWITCH-DATA"
44: #define CACHE_DATA_NAME "CACHE-DATA"
1.164 paf 45:
1.129 paf 46: #define EXCEPTION_VAR_NAME "exception"
47:
48: // statics
49:
50: //^switch ^case
51: static const String switch_data_name(SWITCH_DATA_NAME);
52: //^cache
53: static const String cache_data_name(CACHE_DATA_NAME);
54:
55: static const String exception_var_name(EXCEPTION_VAR_NAME);
56:
1.164 paf 57:
1.136 paf 58: // local defines
59:
60: #define CACHE_EXCEPTION_HANDLED_CACHE_NAME "cache"
61:
1.129 paf 62: // helpers
63:
1.187 misha 64: class Untaint_lang_name2enum: public HashString<String::Language> {
1.129 paf 65: public:
66: Untaint_lang_name2enum() {
67: #define ULN(name, LANG) \
1.130 paf 68: put(String::Body(name), (value_type)(String::L_##LANG));
1.129 paf 69: ULN("as-is", AS_IS);
70: ULN("optimized-as-is", AS_IS|String::L_OPTIMIZE_BIT);
71: ULN("file-spec", FILE_SPEC);
72: ULN("http-header", HTTP_HEADER);
73: ULN("mail-header", MAIL_HEADER);
74: ULN("uri", URI);
75: ULN("sql", SQL);
76: ULN("js", JS);
77: ULN("xml", XML);
78: ULN("optimized-xml", XML|String::L_OPTIMIZE_BIT);
79: ULN("html", HTML);
80: ULN("optimized-html", HTML|String::L_OPTIMIZE_BIT);
1.159 paf 81: ULN("regex", REGEX);
1.193 misha 82: ULN("parser-code", PARSER_CODE);
1.129 paf 83: #undef ULN
84: }
85: } untaint_lang_name2enum;
86:
1.10 paf 87: // methods
88:
1.129 paf 89: static void _if(Request& r, MethodParams& params) {
1.156 paf 90: bool condition=params.as_bool(0, "condition must be expression", r);
1.6 paf 91: if(condition)
1.185 misha 92: r.process_write(*params.get(1));
1.129 paf 93: else if(params.count()>2)
1.185 misha 94: r.process_write(*params.get(2));
1.1 paf 95: }
96:
1.175 misha 97: static String::Language get_untaint_lang(MethodParams& params, int index){
98: const String& lang_name=params.as_string(index, "lang must be string");
99: String::Language lang=untaint_lang_name2enum.get(lang_name);
100: if(!lang)
1.183 misha 101: throw Exception(PARSER_RUNTIME,
1.175 misha 102: &lang_name,
103: "invalid taint language");
104: return lang;
105: }
106:
1.129 paf 107: static void _untaint(Request& r, MethodParams& params) {
108: String::Language lang;
109: if(params.count()==1)
1.175 misha 110: lang=String::L_AS_IS; // mark as simply 'as-is'. useful in html from sql
111: else
112: lang=get_untaint_lang(params, 0);
1.1 paf 113:
114: {
1.129 paf 115: Value& vbody=params.as_junction(params.count()-1, "body must be code");
1.1 paf 116:
1.191 misha 117: Temp_lang temp_lang(r, lang); // set temporarily specified ^untaint[language;
118: StringOrValue result=r.process(vbody); // process marking tainted with that lang
1.188 misha 119: r.write_assign_lang(result);
1.1 paf 120: }
121: }
122:
1.129 paf 123: static void _taint(Request& r, MethodParams& params) {
124: String::Language lang;
125: if(params.count()==1)
1.175 misha 126: lang=String::L_TAINTED; // mark as simply 'tainted'. useful in table:create
127: else
128: lang=get_untaint_lang(params, 0);
1.1 paf 129:
130: {
1.129 paf 131: Value& vbody=params.as_no_junction(params.count()-1, "body must not be code");
1.1 paf 132:
1.191 misha 133: String result(vbody.as_string(), lang); // force result language to specified
1.188 misha 134: r.write_assign_lang(result);
1.1 paf 135: }
136: }
137:
1.129 paf 138: static void _process(Request& r, MethodParams& params) {
139: Method* main_method;
140:
141: size_t index=0;
142: Value* target_self;
143: Value& maybe_target_self=params[index];
144: if(maybe_target_self.get_string() || maybe_target_self.get_junction())
145: target_self=&r.get_method_frame()->caller()->self();
146: else {
147: target_self=&maybe_target_self; index++;
148: }
149:
1.1 paf 150: {
1.197 ! misha 151: VStateless_class *target_class=target_self->get_class();
1.116 paf 152: if(!target_class)
1.166 misha 153: throw Exception(PARSER_RUNTIME,
1.129 paf 154: 0,
1.116 paf 155: "no target class");
1.114 paf 156:
1.73 paf 157: // temporary remove language change
1.192 misha 158: Temp_lang temp_lang(r, String::L_PARSER_CODE);
1.1 paf 159: // temporary zero @main so to maybe-replace it in processed code
1.129 paf 160: Temp_method temp_method_main(*target_class, main_method_name, 0);
1.1 paf 161: // temporary zero @auto so it wouldn't be auto-called in Request::use_buf
1.129 paf 162: Temp_method temp_method_auto(*target_class, auto_method_name, 0);
163:
1.146 paf 164: size_t options_index=index+1;
165: HashStringValue* options=0;
166: if(options_index<params.count()) {
1.195 misha 167: Value& voptions=params.as_no_junction(options_index, OPTIONS_MUST_NOT_BE_CODE);
1.146 paf 168: options=voptions.get_hash();
169: if(!options)
1.166 misha 170: throw Exception(PARSER_RUNTIME,
1.146 paf 171: 0,
172: "options must be hash");
173: }
174:
1.129 paf 175: const String* main_alias=0;
1.146 paf 176: const String* file_alias=0;
177: int line_no_alias_offset=0;
178: if(options) {
179: int valid_options=0;
180: if(Value* vmain_alias=options->get(PROCESS_MAIN_OPTION_NAME)) {
181: valid_options++;
182: main_alias=&vmain_alias->as_string();
183: }
184: if(Value* vfile_alias=options->get(PROCESS_FILE_OPTION_NAME)) {
185: valid_options++;
186: file_alias=&vfile_alias->as_string();
187: }
188: if(Value* vline_no_alias_offset=options->get(PROCESS_LINENO_OPTION_NAME)) {
189: valid_options++;
190: line_no_alias_offset=vline_no_alias_offset->as_int();
191: }
192:
193: if(valid_options!=options->count())
1.166 misha 194: throw Exception(PARSER_RUNTIME,
1.146 paf 195: 0,
196: "called with invalid option");
197: }
1.129 paf 198:
1.146 paf 199: uint processe_file_no=file_alias?
200: r.register_file(r.absolute(*file_alias))
201: : pseudo_file_no__process;
202: // process...{string}
203: Value& vjunction=params.as_junction(index, "body must be code");
204: // evaluate source to process
205: const String& source=r.process_to_string(vjunction);
206: r.use_buf(*target_class,
1.190 misha 207: source.untaint_cstr(String::L_AS_IS, r.connection(false)),
1.146 paf 208: main_alias,
209: processe_file_no,
210: line_no_alias_offset);
1.1 paf 211:
1.73 paf 212: // main_method
1.129 paf 213: main_method=target_class->get_method(main_method_name);
1.73 paf 214: }
215: // after restoring current-request-lang
216: // maybe-execute @main[]
217: if(main_method) {
1.119 paf 218: // temporarily set method_frame's self to target_self
1.129 paf 219: Temp_method_frame_self tmfs(*r.get_method_frame(), *target_self);
1.73 paf 220: // execute!
221: r.execute(*main_method->parser_code);
1.1 paf 222: }
223: }
224:
1.138 paf 225: static void _rem(Request&, MethodParams& params) {
1.129 paf 226: params.as_junction(0, "body must be code");
1.1 paf 227: }
228:
1.129 paf 229: static void _while(Request& r, MethodParams& params) {
1.196 misha 230: InCycle temp(r);
1.164 paf 231:
1.170 misha 232: Value& vcondition=params.as_expression(0, "condition must be number, bool or expression");
233:
1.162 paf 234: Value& body_code=params.as_junction(1, "body must be code");
235: Value* delim_maybe_code=params.count()>2?¶ms[2]:0;
1.1 paf 236:
237: // while...
238: int endless_loop_count=0;
1.186 misha 239: if(delim_maybe_code){ // delimiter set
1.185 misha 240: bool need_delim=false;
241: while(true) {
242: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
243: throw Exception(PARSER_RUNTIME,
244: 0,
245: "endless loop detected");
246:
247: if(!r.process_to_value(vcondition, false/*don't intercept string*/).as_bool())
248: break;
1.1 paf 249:
1.185 misha 250: StringOrValue sv_processed=r.process(body_code);
251: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 misha 252:
1.185 misha 253: const String* s_processed=sv_processed.get_string();
1.186 misha 254: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 255: if(need_delim) // need delim & iteration produced string?
256: r.write_pass_lang(r.process(*delim_maybe_code));
257: else
258: need_delim=true;
259: }
260: r.write_pass_lang(sv_processed);
1.1 paf 261:
1.185 misha 262: if(lskip==Request::SKIP_BREAK)
263: break;
1.162 paf 264: }
1.185 misha 265: } else {
266: while(true) {
267: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
268: throw Exception(PARSER_RUNTIME,
269: 0,
270: "endless loop detected");
271:
272: if(!r.process_to_value(vcondition, false/*don't intercept string*/).as_bool())
273: break;
1.164 paf 274:
1.185 misha 275: r.process_write(body_code);
276: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
277:
278: if(lskip==Request::SKIP_BREAK)
279: break;
280: }
1.1 paf 281: }
282: }
283:
1.129 paf 284: static void _use(Request& r, MethodParams& params) {
1.171 misha 285: Value& vfile=params.as_no_junction(0, FILE_NAME_MUST_NOT_BE_CODE);
1.113 paf 286: r.use_file(r.main_class, vfile.as_string());
1.1 paf 287: }
288:
1.164 paf 289: static void set_skip(Request& r, Request::Skip askip) {
1.196 misha 290: if(!r.get_in_cycle())
1.166 misha 291: throw Exception(PARSER_RUNTIME,
1.164 paf 292: 0,
293: "without cycle");
294:
295: r.set_skip(askip);
296: }
297:
298: static void _break(Request& r, MethodParams&) {
299: set_skip(r, Request::SKIP_BREAK);
300: }
301:
302: static void _continue(Request& r, MethodParams&) {
303: set_skip(r, Request::SKIP_CONTINUE);
304: }
305:
1.129 paf 306: static void _for(Request& r, MethodParams& params) {
1.196 misha 307: InCycle temp(r);
1.164 paf 308:
1.129 paf 309: const String& var_name=params.as_string(0, "var name must be string");
310: int from=params.as_int(1, "from must be int", r);
311: int to=params.as_int(2, "to must be int", r);
1.186 misha 312: Value& body_code=params.as_junction(3, "body must be code");
1.129 paf 313: Value* delim_maybe_code=params.count()>4?¶ms[4]:0;
1.1 paf 314:
1.57 paf 315: if(to-from>=MAX_LOOPS) // too long loop?
1.166 misha 316: throw Exception(PARSER_RUNTIME,
1.129 paf 317: 0,
1.57 paf 318: "endless loop detected");
319:
1.129 paf 320: VInt* vint=new VInt(0);
1.154 paf 321:
322: VMethodFrame& caller=*r.get_method_frame()->caller();
1.197 ! misha 323: caller.put_element(var_name, vint, false);
1.186 misha 324: if(delim_maybe_code){ // delimiter set
1.185 misha 325: bool need_delim=false;
326:
327: for(int i=from; i<=to; i++) {
328: vint->set_int(i);
329:
330: StringOrValue sv_processed=r.process(body_code);
331: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 misha 332:
1.185 misha 333: const String* s_processed=sv_processed.get_string();
1.186 misha 334: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 335: if(need_delim) // need delim & iteration produced string?
336: r.write_pass_lang(r.process(*delim_maybe_code));
337: else
338: need_delim=true;
339: }
340: r.write_pass_lang(sv_processed);
1.1 paf 341:
1.185 misha 342: if(lskip==Request::SKIP_BREAK)
343: break;
1.1 paf 344: }
1.185 misha 345: } else {
346: for(int i=from; i<=to; i++) {
347: vint->set_int(i);
348:
349: r.process_write(body_code);
350: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.164 paf 351:
1.185 misha 352: if(lskip==Request::SKIP_BREAK)
353: break;
354: }
1.1 paf 355: }
356: }
357:
1.129 paf 358: static void _eval(Request& r, MethodParams& params) {
359: Value& expr=params.as_junction(0, "need expression");
1.1 paf 360: // evaluate expresion
1.129 paf 361: Value& value_result=r.process_to_value(expr,
1.165 misha 362: false/*don't intercept string*/).as_expr_result();
1.129 paf 363: if(params.count()>1) {
1.177 misha 364: const String& fmt=params.as_string(1, "fmt must be string").trim();
365: if(fmt.is_empty()){
366: r.write_no_lang(value_result);
367: } else {
368: r.write_no_lang(String(format(value_result.as_double(), fmt.cstrm())));
369: }
1.91 paf 370: } else
1.129 paf 371: r.write_no_lang(value_result);
1.1 paf 372: }
373:
1.129 paf 374: static void _connect(Request& r, MethodParams& params) {
1.63 paf 375: #ifdef RESOURCES_DEBUG
376: struct timeval mt[2];
377: #endif
1.129 paf 378: Value& url=params.as_no_junction(0, "url must not be code");
379: Value& body_code=params.as_junction(1, "body must be code");
1.1 paf 380:
1.129 paf 381: Table* protocol2driver_and_client=0;
1.197 ! misha 382: if(Value* sql=r.main_class.get_element(String(MAIN_SQL_NAME))) {
! 383: if(Value* element=sql->get_element(String(MAIN_SQL_DRIVERS_NAME))) {
1.113 paf 384: protocol2driver_and_client=element->get_table();
385: }
386: }
1.11 paf 387:
1.63 paf 388: #ifdef RESOURCES_DEBUG
389: //measure:before
390: gettimeofday(&mt[0],NULL);
391: #endif
1.1 paf 392: // connect
1.142 paf 393: SQL_Connection* connection=SQL_driver_manager->get_connection(url.as_string(),
1.144 paf 394: protocol2driver_and_client,
1.180 misha 395: r.charsets.source().NAME().cstr(),
396: r.request_info.document_root);
1.1 paf 397:
1.63 paf 398: #ifdef RESOURCES_DEBUG
399: //measure:after connect
400: gettimeofday(&mt[1],NULL);
401:
402: double t[2];
403: for(int i=0;i<2;i++)
404: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
405:
406: r.sql_connect_time+=t[1]-t[0];
407: #endif
1.129 paf 408: Temp_connection temp_connection(r, connection);
1.1 paf 409: // execute body
1.53 parser 410: try {
1.189 misha 411: r.process_write(body_code);
1.129 paf 412: connection->commit();
413: connection->close();
1.75 paf 414: } catch(...) { // process problem
1.129 paf 415: connection->rollback();
416: connection->close();
417: rethrow;
1.1 paf 418: }
419: }
420:
1.41 parser 421: #ifndef DOXYGEN
1.129 paf 422: class Switch_data: public PA_Object {
423: public:
424: Request& r;
1.181 misha 425: const String* searching_string;
426: double searching_double;
1.129 paf 427: Value* found;
428: Value* _default;
429: public:
430: Switch_data(Request& ar, Value& asearching):
1.181 misha 431: r(ar)
432: {
433: if(asearching.is_string() || asearching.is_void()){
434: searching_string=&asearching.as_string();
435: searching_double=0;
436: } else {
437: searching_string=0;
438: searching_double=asearching.as_double();
439: }
440: }
1.28 parser 441: };
1.41 parser 442: #endif
1.129 paf 443: static void _switch(Request& r, MethodParams& params) {
444: Switch_data* data=new Switch_data(r, r.process_to_value(params[0]));
1.135 paf 445: Temp_hash_value<const String::Body, void*>
1.129 paf 446: switch_data_setter(r.classes_conf, switch_data_name, data);
1.28 parser 447:
1.129 paf 448: Value& cases_code=params.as_junction(1, "switch cases must be code");
1.82 paf 449: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
450: // because of stacked WWrapper used there as wcontext
1.84 paf 451: r.process(cases_code, true/*intercept_string*/);
1.147 paf 452: if(Value* selected_code=data->found? data->found: data->_default)
1.107 paf 453: r.write_pass_lang(r.process(*selected_code));
1.28 parser 454: }
455:
1.129 paf 456: static void _case(Request& r, MethodParams& params) {
457: Switch_data* data=static_cast<Switch_data*>(r.classes_conf.get(switch_data_name));
1.38 parser 458: if(!data)
1.166 misha 459: throw Exception(PARSER_RUNTIME,
1.129 paf 460: 0,
1.38 parser 461: "without switch");
1.28 parser 462:
1.181 misha 463: if(data->found) // matches already was found
464: return;
465:
1.129 paf 466: int count=params.count();
1.184 misha 467: Value* code=¶ms.as_expression(--count, "case result must be code");
468:
469: #ifdef USE_DESTRUCTORS
470: Junction *j=code->get_junction();
471: if (j){
472: code=new VJunction(j->self,j->method,j->method_frame,j->rcontext,j->wcontext,j->code);
473: if (j->wcontext) j->wcontext->attach_junction((VJunction *)code);
474: }
475: #endif
1.83 paf 476:
1.181 misha 477: for(int i=0; i<count; i++){
1.129 paf 478: Value& value=r.process_to_value(params[i]);
1.28 parser 479:
1.181 misha 480: if(value.is_string() && value.as_string() == CASE_DEFAULT_VALUE){
1.184 misha 481: data->_default=code;
1.181 misha 482: continue;
1.28 parser 483: }
484:
485: bool matches;
1.181 misha 486: if(data->searching_string)
487: matches=(*data->searching_string) == value.as_string();
1.28 parser 488: else
1.181 misha 489: matches=data->searching_double == value.as_double();
1.82 paf 490:
1.181 misha 491: if(matches){
1.184 misha 492: data->found=code;
1.28 parser 493: break;
494: }
495: }
496: }
1.136 paf 497: #ifndef DOXYGEN
498: struct Try_catch_result {
499: StringOrValue processed_code;
500: const String* exception_should_be_handled;
501:
502: Try_catch_result(): exception_should_be_handled(0) {}
503: };
504: #endif
505:
506: /// used by ^try and ^cache, @returns $exception.handled[string] if any
507: template<class I>
508: static Try_catch_result try_catch(Request& r,
509: StringOrValue body_code(Request&, I), I info,
1.179 misha 510: Value* catch_code,
511: bool could_be_handled_by_caller=false)
1.136 paf 512: {
513: Try_catch_result result;
1.179 misha 514:
1.136 paf 515: if(!catch_code) {
516: result.processed_code=body_code(r, info);
517: return result;
518: }
519:
520: // taking snapshot of try-context
521: Request_context_saver try_context(r);
522: try {
523: result.processed_code=body_code(r, info);
524: } catch(const Exception& e) {
525: Request_context_saver throw_context(r); // taking snapshot of throw-context [stack trace contains error]
526: Request::Exception_details details=r.get_details(e);
527: try_context.restore(); // restoring try-context to perform catch-code
528:
529: Junction* junction=catch_code->get_junction();
530: Value* method_frame=junction->method_frame;
1.197 ! misha 531: Value* saved_exception_var_value=method_frame->get_element(exception_var_name);
1.154 paf 532: VMethodFrame& frame=*junction->method_frame;
1.197 ! misha 533: frame.put_element(exception_var_name, &details.vhash, false);
1.179 misha 534:
1.136 paf 535: result.processed_code=r.process(*catch_code);
536:
537: // retriving $exception.handled, restoring $exception var
538: Value* vhandled=details.vhash.hash().get(exception_handled_part_name);
1.197 ! misha 539: frame.put_element(exception_var_name, saved_exception_var_value, false);
1.136 paf 540:
541: bool bhandled=false;
542: if(vhandled) {
543: if(vhandled->is_string()) { // not simple $exception.handled(1/0)?
1.160 paf 544: if(could_be_handled_by_caller) { // and we can possibly handle it
545: result.exception_should_be_handled=vhandled->get_string(); // considering 'recovered' and let the caller recover
546: return result;
547: }
548:
549: bhandled=false;
550: } else
1.179 misha 551: bhandled=vhandled->as_bool();
1.136 paf 552: }
553:
554: if(!bhandled) {
555: throw_context.restore(); // restoring throw-context [exception were not handled]
556: rethrow;
557: }
558: }
1.179 misha 559:
1.136 paf 560: return result;
561: }
1.28 parser 562:
1.63 paf 563: // cache--
564:
565: // consts
566:
1.152 paf 567: const int DATA_STRING_SERIALIZED_VERSION=0x0006;
1.63 paf 568:
569: // helper types
570:
571: #ifndef DOXYGEN
572: struct Data_string_serialized_prolog {
573: int version;
1.79 paf 574: time_t expires;
1.63 paf 575: };
576: #endif
577:
1.68 paf 578: void cache_delete(const String& file_spec) {
1.167 misha 579: file_delete(file_spec, false/*fail_on_problem*/);
1.63 paf 580: }
1.69 paf 581:
582: #ifndef DOXYGEN
1.135 paf 583: struct Cache_scope {
1.129 paf 584: public:
1.79 paf 585: time_t expires;
1.135 paf 586: const String* body_from_disk;
1.79 paf 587: };
1.69 paf 588: struct Locked_process_and_cache_put_action_info {
589: Request *r;
1.136 paf 590: Cache_scope *scope;
1.167 misha 591: Value* body_code;
592: Value* catch_code;
1.136 paf 593: const String* processed_code;
1.69 paf 594: };
595: #endif
1.136 paf 596:
597:
598:
599: static StringOrValue process_cache_body_code(Request& r, Value* body_code) {
1.153 paf 600: return StringOrValue(r.process_to_string(*body_code));
1.136 paf 601: }
602:
1.129 paf 603: /* @todo maybe network order worth spending some effort?
604: don't bothering myself with network byte order,
605: am not planning to be able to move resulting file across platforms
606: */
1.69 paf 607: static void locked_process_and_cache_put_action(int f, void *context) {
608: Locked_process_and_cache_put_action_info& info=
609: *static_cast<Locked_process_and_cache_put_action_info *>(context);
1.129 paf 610:
1.160 paf 611: const String* body_from_disk=info.scope->body_from_disk;
1.69 paf 612: // body->process
1.136 paf 613: Try_catch_result result=try_catch(*info.r,
614: process_cache_body_code, info.body_code,
1.160 paf 615: info.catch_code, body_from_disk!=0 /*we have something old=we can handle=recover later*/);
1.136 paf 616:
617: if(result.exception_should_be_handled) {
618: if(*result.exception_should_be_handled==CACHE_EXCEPTION_HANDLED_CACHE_NAME) {
1.160 paf 619: assert(body_from_disk);
620: info.processed_code=body_from_disk;
1.136 paf 621: } else
1.166 misha 622: throw Exception(PARSER_RUNTIME,
1.136 paf 623: result.exception_should_be_handled,
624: "$"EXCEPTION_VAR_NAME"."EXCEPTION_HANDLED_PART_NAME" value must be "
625: "either boolean or string '"CACHE_EXCEPTION_HANDLED_CACHE_NAME"'");
626: } else
627: info.processed_code=&result.processed_code.as_string();
1.69 paf 628:
1.79 paf 629: // expiration time not spoiled by ^cache(0) or something?
1.136 paf 630: if(info.scope->expires > time(0)) {
1.79 paf 631: // string -serialize> buffer
1.136 paf 632: String::Cm serialized=info.processed_code->serialize(
1.129 paf 633: sizeof(Data_string_serialized_prolog));
1.79 paf 634: Data_string_serialized_prolog& prolog=
1.129 paf 635: *reinterpret_cast<Data_string_serialized_prolog *>(serialized.str);
1.79 paf 636: prolog.version=DATA_STRING_SERIALIZED_VERSION;
1.136 paf 637: prolog.expires=info.scope->expires;
1.79 paf 638:
639: // buffer -write> file
1.129 paf 640: write(f, serialized.str, serialized.length);
1.79 paf 641: } else // expired!
1.136 paf 642: info.scope->expires=0; // flag it so that could be easily checked by caller
1.69 paf 643: }
1.129 paf 644: const String* locked_process_and_cache_put(Request& r,
1.128 paf 645: Value& body_code,
1.136 paf 646: Value* catch_code,
647: Cache_scope& scope,
648: const String& file_spec)
649: {
1.140 paf 650: Locked_process_and_cache_put_action_info info={&r, &scope, &body_code, catch_code, 0};
1.69 paf 651:
1.129 paf 652: const String* result=file_write_action_under_lock(
1.69 paf 653: file_spec,
1.168 misha 654: "cache_put",
655: locked_process_and_cache_put_action,
656: &info,
1.69 paf 657: false/*as_text*/,
658: false/*do_append*/,
1.173 misha 659: false/*block == don't wait till other thread release lock*/,
660: false/*dun throw exception if lock failed*/) ? info.processed_code: 0;
1.168 misha 661:
1.100 paf 662: time_t now=time(0);
1.136 paf 663: if(scope.expires<=now)
1.79 paf 664: cache_delete(file_spec);
665: return result;
1.63 paf 666: }
1.137 paf 667: #ifndef DOXYGEN
1.135 paf 668: struct Cache_get_result {
669: const String* body;
670: bool expired;
1.137 paf 671: };
672: #endif
673: static Cache_get_result cache_get(Request_charsets& charsets, const String& file_spec, time_t now) {
1.140 paf 674: Cache_get_result result={0, false};
1.135 paf 675:
1.129 paf 676: File_read_result file=file_read(charsets, file_spec,
1.63 paf 677: false/*as_text*/,
1.129 paf 678: 0, //no params
679: false/*fail_on_read_problem*/);
680: if(file.success && file.length/* ignore reads which are empty due to
1.72 paf 681: non-unary open+lockEX conflict with lockSH */) {
1.129 paf 682:
1.72 paf 683: Data_string_serialized_prolog& prolog=
1.129 paf 684: *reinterpret_cast<Data_string_serialized_prolog *>(file.str);
1.63 paf 685:
1.135 paf 686: String* body=new String;
1.72 paf 687: if(
1.129 paf 688: file.length>=sizeof(Data_string_serialized_prolog)
1.135 paf 689: && prolog.version==DATA_STRING_SERIALIZED_VERSION) {
690: if(body->deserialize(sizeof(Data_string_serialized_prolog), file.str, file.length)) {
691: result.body=body;
692: result.expired=prolog.expires <= now;
693: }
694: }
1.72 paf 695: }
1.63 paf 696:
1.135 paf 697: return result;
1.63 paf 698: }
1.129 paf 699: static time_t as_expires(Request& r, MethodParams& params,
1.79 paf 700: int index, time_t now) {
701: time_t result;
1.197 ! misha 702: if(Value* vdate=params[index].as(VDATE_TYPE))
1.129 paf 703: result=static_cast<VDate*>(vdate)->get_time();
1.79 paf 704: else
1.129 paf 705: result=now+(time_t)params.as_double(index, "lifespan must be date or number", r);
1.79 paf 706:
707: return result;
708: }
1.129 paf 709: static const String& as_file_spec(Request& r, MethodParams& params, int index) {
710: return r.absolute(params.as_string(index, "filespec must be string"));
1.79 paf 711: }
1.129 paf 712: static void _cache(Request& r, MethodParams& params) {
1.173 misha 713: if(params.count()==0) {
714: // ^cache[] -- return current expiration time
1.158 paf 715: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
716: if(!scope)
1.166 misha 717: throw Exception(PARSER_RUNTIME,
1.158 paf 718: 0,
719: "expire-time get without cache");
720: r.write_no_lang(*new VDate(scope->expires));
721: return;
722: }
723:
1.79 paf 724: time_t now=time(0);
725:
1.129 paf 726: if(params.count()==1) {
1.173 misha 727: // ^cache[filename] ^cache(seconds) ^cache[expires date]
1.129 paf 728: if(params[0].is_string()) { // filename?
1.79 paf 729: cache_delete(as_file_spec(r, params, 0));
730: return;
731: }
732:
733: // secods|expires date
1.135 paf 734: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
735: if(!scope)
1.166 misha 736: throw Exception(PARSER_RUNTIME,
1.129 paf 737: 0,
1.79 paf 738: "expire-time reducing instruction without cache");
739:
1.129 paf 740: time_t expires=as_expires(r, params, 0, now);
1.135 paf 741: if(expires < scope->expires)
742: scope->expires=expires;
1.79 paf 743:
744: return;
1.149 paf 745: } else if(params.count()<3)
1.166 misha 746: throw Exception(PARSER_RUNTIME,
1.149 paf 747: 0,
748: "invalid number of parameters");
1.63 paf 749:
750: // file_spec, expires, body code
1.172 misha 751: const String& file_spec=as_file_spec(r, params, 0);
1.65 paf 752:
1.141 paf 753: Cache_scope scope={as_expires(r, params, 1, now), 0};
1.135 paf 754:
755: Temp_hash_value<const String::Body, void*>
756: cache_scope_setter(r.classes_conf, cache_data_name, &scope);
1.136 paf 757: Value& body_code=params.as_junction(2, "body_code must be code");
758: Value* catch_code=0;
759: if(params.count()>3)
760: catch_code=¶ms.as_junction(3, "catch_code must be code");
1.63 paf 761:
1.168 misha 762: if(scope.expires>now) {
763: Cache_get_result cached=cache_get(r.charsets, file_spec, now);
1.69 paf 764:
1.168 misha 765: if(cached.body) { // have cached copy
1.174 misha 766: if(cached.expired) {
767: scope.body_from_disk=cached.body; // storing for user to retrive it with ^cache[]
768: } else {
769: // and it's not expired yet write it out
1.168 misha 770: r.write_assign_lang(*cached.body);
771: // happy with it
772: return;
773: }
774: }
775:
776: // no cached info or it's already expired
1.173 misha 777:
778: // trying to process it under lock and store result in file
1.174 misha 779: const String* processed_body=locked_process_and_cache_put(r, body_code, catch_code, scope, file_spec);
1.173 misha 780: if(processed_body){
1.174 misha 781: // write it out
782: r.write_assign_lang(*processed_body);
783: // happy with it
784: return;
1.173 misha 785: } else {
786: // we fail while get exclusive lock. nvm, we just execute body_code a bit later
1.174 misha 787: }
1.69 paf 788: } else {
1.79 paf 789: // instructed not to cache; forget cached copy
1.68 paf 790: cache_delete(file_spec);
1.69 paf 791: }
1.168 misha 792:
793: // process without cacheing
794: const String& processed_body=r.process_to_string(body_code);
795: // write it out
796: r.write_assign_lang(processed_body);
1.63 paf 797: }
798:
1.136 paf 799: static StringOrValue process_try_body_code(Request& r, Value* body_code) {
800: return r.process(*body_code);
801: }
1.129 paf 802: static void _try_operator(Request& r, MethodParams& params) {
803: Value& body_code=params.as_junction(0, "body_code must be code");
804: Value& catch_code=params.as_junction(1, "catch_code must be code");
1.179 misha 805: Value* finally_code=(params.count()==3) ? ¶ms.as_junction(2, "finally_code must be code") : 0;
806:
807: Try_catch_result result;
808: StringOrValue finally_result;
809: try{
810: result=try_catch(r,
811: process_try_body_code, &body_code,
812: &catch_code);
813: if(result.exception_should_be_handled)
814: throw Exception(PARSER_RUNTIME,
815: result.exception_should_be_handled,
816: "catch block must set $exception.handled to some boolean value, not string");
817: } catch(...){
818: if(finally_code)
819: finally_result=r.process(*finally_code);
820: rethrow;
821: }
1.74 paf 822:
1.179 misha 823: if(finally_code)
824: finally_result=r.process(*finally_code);
1.123 paf 825:
1.136 paf 826: // write out processed body_code or catch_code
827: r.write_pass_lang(result.processed_code);
1.179 misha 828:
829: // write out processed finally code
830: if(finally_code)
831: r.write_pass_lang(finally_result);
1.74 paf 832: }
833:
1.138 paf 834: static void _throw_operator(Request&, MethodParams& params) {
1.178 misha 835: if(params.count()==1 && !params[0].is_string()) {
1.129 paf 836: if(HashStringValue *hash=params[0].get_hash()) {
837: const char* type=0;
838: if(Value* value=hash->get(exception_type_part_name))
1.78 paf 839: type=value->as_string().cstr();
1.129 paf 840: const String* source=0;
841: if(Value* value=hash->get(exception_source_part_name))
1.74 paf 842: source=&value->as_string();
1.138 paf 843: const char* comment=0;
1.129 paf 844: if(Value* value=hash->get(exception_comment_part_name))
1.74 paf 845: comment=value->as_string().cstr();
846:
1.78 paf 847: throw Exception(type,
1.129 paf 848: source?source:0,
849: "%s", comment?comment:"");
1.74 paf 850: } else
1.166 misha 851: throw Exception(PARSER_RUNTIME,
1.129 paf 852: 0,
1.178 misha 853: "one-param version has hash or string param");
1.74 paf 854: } else {
1.129 paf 855: const char* type=params.as_string(0, "type must be string").cstr();
1.178 misha 856: const String* source=params.count()>1? ¶ms.as_string(1, "source must be string"):0;
857: const char* comment=params.count()>2? params.as_string(2, "comment must be string").cstr():0;
858: throw Exception(type, source, "%s", comment?comment:"");
1.74 paf 859: }
1.132 paf 860: }
1.129 paf 861:
1.150 paf 862: static void _sleep_operator(Request& r, MethodParams& params) {
863: double seconds=params.as_double(0, "seconds must be double", r);
1.151 paf 864: pa_sleep((int)trunc(seconds), (int)trunc(seconds*1000));
1.150 paf 865: }
866:
1.129 paf 867: #if defined(WIN32) && defined(_DEBUG)
868: # define PA_BPT
1.138 paf 869: static void _bpt(Request&, MethodParams&) {
1.129 paf 870: _asm int 3;
871: }
872: #endif
873:
1.10 paf 874: // constructor
875:
1.129 paf 876: VClassMAIN::VClassMAIN(): VClass() {
877: set_name(*new String(MAIN_CLASS_NAME));
878:
879: #ifdef PA_BPT
880: // ^bpt[]
881: add_native_method("bpt", Method::CT_ANY, _bpt, 0, 0);
882: #endif
1.121 paf 883:
1.1 paf 884: // ^if(condition){code-when-true}
885: // ^if(condition){code-when-true}{code-when-false}
1.185 misha 886: add_native_method("if", Method::CT_ANY, _if, 2, 3, Method::CO_WITHOUT_FRAME);
1.1 paf 887:
1.194 misha 888: // ^untaint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
889: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 890:
1.194 misha 891: // ^taint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
892: add_native_method("taint", Method::CT_ANY, _taint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 893:
894: // ^process[code]
1.146 paf 895: add_native_method("process", Method::CT_ANY, _process, 1, 3);
1.1 paf 896:
897: // ^rem{code}
1.185 misha 898: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 899:
900: // ^while(condition){code}
1.185 misha 901: add_native_method("while", Method::CT_ANY, _while, 2, 3, Method::CO_WITHOUT_FRAME);
1.1 paf 902:
903: // ^use[file]
1.10 paf 904: add_native_method("use", Method::CT_ANY, _use, 1, 1);
1.1 paf 905:
1.164 paf 906: // ^break[]
1.185 misha 907: add_native_method("break", Method::CT_ANY, _break, 0, 0, Method::CO_WITHOUT_FRAME);
908:
1.164 paf 909: // ^continue[]
1.185 misha 910: add_native_method("continue", Method::CT_ANY, _continue, 0, 0, Method::CO_WITHOUT_FRAME);
911:
1.54 paf 912: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.185 misha 913: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1, Method::CO_WITHOUT_WCONTEXT);
1.1 paf 914:
915: // ^eval(expr)
916: // ^eval(expr)[format]
1.185 misha 917: add_native_method("eval", Method::CT_ANY, _eval, 1, 2, Method::CO_WITHOUT_FRAME);
1.52 parser 918:
1.1 paf 919: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 920: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
921:
1.63 paf 922:
1.136 paf 923: // ^cache[file_spec](time){code}[{catch code}] time=0 no cache
1.65 paf 924: // ^cache[file_spec] delete cache
1.161 paf 925: // ^cache[] get current expiration time
926: add_native_method("cache", Method::CT_ANY, _cache, 0, 4);
1.63 paf 927:
1.28 parser 928: // switch
929:
930: // ^switch[value]{cases}
1.185 misha 931: add_native_method("switch", Method::CT_ANY, _switch, 2, 2, Method::CO_WITHOUT_FRAME);
1.28 parser 932:
933: // ^case[value]{code}
1.185 misha 934: add_native_method("case", Method::CT_ANY, _case, 2, 10000, Method::CO_WITHOUT_FRAME);
1.74 paf 935:
936: // try-catch
937:
938: // ^try{code}{catch code}
1.185 misha 939: add_native_method("try", Method::CT_ANY, _try_operator, 2, 3, Method::CO_WITHOUT_FRAME);
1.74 paf 940: // ^throw[$exception hash]
941: // ^throw[type;source;comment]
942: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
943:
1.150 paf 944: add_native_method("sleep", Method::CT_ANY, _sleep_operator, 1, 1);
1.10 paf 945: }
1.11 paf 946:
947: // constructor & configurator
1.1 paf 948:
1.129 paf 949: VStateless_class& VClassMAIN_create() {
950: return *new VClassMAIN;
1.1 paf 951: }
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