Annotation of parser3/src/classes/op.C, revision 1.209
1.1 paf 1: /** @file
1.9 paf 2: Parser: parser @b operators.
1.1 paf 3:
1.209 ! moko 4: Copyright (c) 2001-2012 Art. Lebedev Studio (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:
1.13 paf 8: #include "classes.h"
1.129 paf 9: #include "pa_vmethod_frame.h"
10:
1.1 paf 11: #include "pa_common.h"
1.134 paf 12: #include "pa_os.h"
1.1 paf 13: #include "pa_request.h"
14: #include "pa_vint.h"
15: #include "pa_sql_connection.h"
1.79 paf 16: #include "pa_vdate.h"
1.105 paf 17: #include "pa_vmethod_frame.h"
1.129 paf 18: #include "pa_vclass.h"
1.144 paf 19: #include "pa_charset.h"
1.1 paf 20:
1.209 ! moko 21: volatile const char * IDENT_OP_C="$Id: 2011-11-11 22:14:50 $";
! 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));
1.198 misha 69: ULN("clean", CLEAN);
1.129 paf 70: ULN("as-is", AS_IS);
71: ULN("optimized-as-is", AS_IS|String::L_OPTIMIZE_BIT);
72: ULN("file-spec", FILE_SPEC);
73: ULN("http-header", HTTP_HEADER);
74: ULN("mail-header", MAIL_HEADER);
75: ULN("uri", URI);
76: ULN("sql", SQL);
77: ULN("js", JS);
78: ULN("xml", XML);
79: ULN("optimized-xml", XML|String::L_OPTIMIZE_BIT);
80: ULN("html", HTML);
81: ULN("optimized-html", HTML|String::L_OPTIMIZE_BIT);
1.159 paf 82: ULN("regex", REGEX);
1.193 misha 83: ULN("parser-code", PARSER_CODE);
1.204 misha 84: ULN("json", JSON);
1.129 paf 85: #undef ULN
86: }
87: } untaint_lang_name2enum;
88:
1.10 paf 89: // methods
90:
1.129 paf 91: static void _if(Request& r, MethodParams& params) {
1.200 moko 92: size_t max_param=params.count()-1;
93: size_t i=0;
94: do {
95: bool condition=params.as_bool(i, "condition must be expression", r);
96: if(condition) {
97: r.process_write(*params.get(i+1));
98: return;
99: }
100: i+=2;
101: } while (i < max_param);
102:
103: if(i == max_param)
104: r.process_write(*params.get(i));
1.1 paf 105: }
106:
1.175 misha 107: static String::Language get_untaint_lang(MethodParams& params, int index){
108: const String& lang_name=params.as_string(index, "lang must be string");
109: String::Language lang=untaint_lang_name2enum.get(lang_name);
110: if(!lang)
1.183 misha 111: throw Exception(PARSER_RUNTIME,
1.175 misha 112: &lang_name,
113: "invalid taint language");
114: return lang;
115: }
116:
1.129 paf 117: static void _untaint(Request& r, MethodParams& params) {
118: String::Language lang;
119: if(params.count()==1)
1.175 misha 120: lang=String::L_AS_IS; // mark as simply 'as-is'. useful in html from sql
121: else
122: lang=get_untaint_lang(params, 0);
1.1 paf 123:
124: {
1.129 paf 125: Value& vbody=params.as_junction(params.count()-1, "body must be code");
1.1 paf 126:
1.191 misha 127: Temp_lang temp_lang(r, lang); // set temporarily specified ^untaint[language;
128: StringOrValue result=r.process(vbody); // process marking tainted with that lang
1.188 misha 129: r.write_assign_lang(result);
1.1 paf 130: }
131: }
132:
1.129 paf 133: static void _taint(Request& r, MethodParams& params) {
134: String::Language lang;
135: if(params.count()==1)
1.175 misha 136: lang=String::L_TAINTED; // mark as simply 'tainted'. useful in table:create
137: else
138: lang=get_untaint_lang(params, 0);
1.1 paf 139:
140: {
1.129 paf 141: Value& vbody=params.as_no_junction(params.count()-1, "body must not be code");
1.1 paf 142:
1.191 misha 143: String result(vbody.as_string(), lang); // force result language to specified
1.188 misha 144: r.write_assign_lang(result);
1.1 paf 145: }
146: }
147:
1.205 moko 148: static void _apply_taint(Request& r, MethodParams& params) {
149: String::Language lang=params.count()==1 ? String::L_AS_IS : get_untaint_lang(params, 0);
150: const String &sbody=params.as_string(params.count()-1, "body must be string");
151: String::Body result_body=sbody.cstr_to_string_body_untaint(lang, 0, &r.charsets);
152: r.write_pass_lang(*new String(result_body, String::L_AS_IS));
153: }
154:
1.129 paf 155: static void _process(Request& r, MethodParams& params) {
156: Method* main_method;
157:
158: size_t index=0;
159: Value* target_self;
160: Value& maybe_target_self=params[index];
161: if(maybe_target_self.get_string() || maybe_target_self.get_junction())
162: target_self=&r.get_method_frame()->caller()->self();
163: else {
164: target_self=&maybe_target_self; index++;
165: }
166:
1.1 paf 167: {
1.197 misha 168: VStateless_class *target_class=target_self->get_class();
1.116 paf 169: if(!target_class)
1.166 misha 170: throw Exception(PARSER_RUNTIME,
1.129 paf 171: 0,
1.116 paf 172: "no target class");
1.114 paf 173:
1.73 paf 174: // temporary remove language change
1.192 misha 175: Temp_lang temp_lang(r, String::L_PARSER_CODE);
1.1 paf 176: // temporary zero @main so to maybe-replace it in processed code
1.129 paf 177: Temp_method temp_method_main(*target_class, main_method_name, 0);
1.1 paf 178: // temporary zero @auto so it wouldn't be auto-called in Request::use_buf
1.129 paf 179: Temp_method temp_method_auto(*target_class, auto_method_name, 0);
180:
1.146 paf 181: size_t options_index=index+1;
182: HashStringValue* options=0;
183: if(options_index<params.count()) {
1.195 misha 184: Value& voptions=params.as_no_junction(options_index, OPTIONS_MUST_NOT_BE_CODE);
1.146 paf 185: options=voptions.get_hash();
186: if(!options)
1.201 misha 187: throw Exception(PARSER_RUNTIME, 0, OPTIONS_MUST_BE_HASH);
1.146 paf 188: }
189:
1.129 paf 190: const String* main_alias=0;
1.146 paf 191: const String* file_alias=0;
192: int line_no_alias_offset=0;
193: if(options) {
194: int valid_options=0;
195: if(Value* vmain_alias=options->get(PROCESS_MAIN_OPTION_NAME)) {
196: valid_options++;
197: main_alias=&vmain_alias->as_string();
198: }
199: if(Value* vfile_alias=options->get(PROCESS_FILE_OPTION_NAME)) {
200: valid_options++;
201: file_alias=&vfile_alias->as_string();
202: }
203: if(Value* vline_no_alias_offset=options->get(PROCESS_LINENO_OPTION_NAME)) {
204: valid_options++;
205: line_no_alias_offset=vline_no_alias_offset->as_int();
206: }
207:
208: if(valid_options!=options->count())
1.201 misha 209: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
1.146 paf 210: }
1.129 paf 211:
1.146 paf 212: uint processe_file_no=file_alias?
213: r.register_file(r.absolute(*file_alias))
214: : pseudo_file_no__process;
215: // process...{string}
216: Value& vjunction=params.as_junction(index, "body must be code");
217: // evaluate source to process
218: const String& source=r.process_to_string(vjunction);
219: r.use_buf(*target_class,
1.190 misha 220: source.untaint_cstr(String::L_AS_IS, r.connection(false)),
1.146 paf 221: main_alias,
222: processe_file_no,
223: line_no_alias_offset);
1.1 paf 224:
1.73 paf 225: // main_method
1.129 paf 226: main_method=target_class->get_method(main_method_name);
1.73 paf 227: }
228: // after restoring current-request-lang
229: // maybe-execute @main[]
230: if(main_method) {
1.202 moko 231: VMethodFrame frame(*main_method, r.get_method_frame()->caller(), *target_self);
232: frame.empty_params();
1.203 moko 233: r.op_call(frame);
234: r.write_pass_lang(frame.result());
1.1 paf 235: }
236: }
237:
1.138 paf 238: static void _rem(Request&, MethodParams& params) {
1.129 paf 239: params.as_junction(0, "body must be code");
1.1 paf 240: }
241:
1.129 paf 242: static void _while(Request& r, MethodParams& params) {
1.196 misha 243: InCycle temp(r);
1.164 paf 244:
1.170 misha 245: Value& vcondition=params.as_expression(0, "condition must be number, bool or expression");
246:
1.162 paf 247: Value& body_code=params.as_junction(1, "body must be code");
248: Value* delim_maybe_code=params.count()>2?¶ms[2]:0;
1.1 paf 249:
250: // while...
251: int endless_loop_count=0;
1.186 misha 252: if(delim_maybe_code){ // delimiter set
1.185 misha 253: bool need_delim=false;
254: while(true) {
255: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
256: throw Exception(PARSER_RUNTIME,
257: 0,
258: "endless loop detected");
259:
260: if(!r.process_to_value(vcondition, false/*don't intercept string*/).as_bool())
261: break;
1.1 paf 262:
1.185 misha 263: StringOrValue sv_processed=r.process(body_code);
264: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 misha 265:
1.185 misha 266: const String* s_processed=sv_processed.get_string();
1.186 misha 267: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 268: if(need_delim) // need delim & iteration produced string?
269: r.write_pass_lang(r.process(*delim_maybe_code));
270: else
271: need_delim=true;
272: }
273: r.write_pass_lang(sv_processed);
1.1 paf 274:
1.185 misha 275: if(lskip==Request::SKIP_BREAK)
276: break;
1.162 paf 277: }
1.185 misha 278: } else {
279: while(true) {
280: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
281: throw Exception(PARSER_RUNTIME,
282: 0,
283: "endless loop detected");
284:
285: if(!r.process_to_value(vcondition, false/*don't intercept string*/).as_bool())
286: break;
1.164 paf 287:
1.185 misha 288: r.process_write(body_code);
289: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
290:
291: if(lskip==Request::SKIP_BREAK)
292: break;
293: }
1.1 paf 294: }
295: }
296:
1.129 paf 297: static void _use(Request& r, MethodParams& params) {
1.171 misha 298: Value& vfile=params.as_no_junction(0, FILE_NAME_MUST_NOT_BE_CODE);
1.199 misha 299:
300: // _use could be called from the parser3 method only, so caller is always defined
1.202 moko 301: r.use_file(r.main_class, vfile.as_string(), r.get_method_filename(&r.get_method_frame()->caller()->method));
1.1 paf 302: }
303:
1.164 paf 304: static void set_skip(Request& r, Request::Skip askip) {
1.196 misha 305: if(!r.get_in_cycle())
1.208 misha 306: throw Exception(askip==Request::SKIP_BREAK?"parser.break":"parser.continue",
1.164 paf 307: 0,
308: "without cycle");
309:
310: r.set_skip(askip);
311: }
312:
313: static void _break(Request& r, MethodParams&) {
314: set_skip(r, Request::SKIP_BREAK);
315: }
316:
317: static void _continue(Request& r, MethodParams&) {
318: set_skip(r, Request::SKIP_CONTINUE);
319: }
320:
1.129 paf 321: static void _for(Request& r, MethodParams& params) {
1.196 misha 322: InCycle temp(r);
1.164 paf 323:
1.129 paf 324: const String& var_name=params.as_string(0, "var name must be string");
325: int from=params.as_int(1, "from must be int", r);
326: int to=params.as_int(2, "to must be int", r);
1.186 misha 327: Value& body_code=params.as_junction(3, "body must be code");
1.129 paf 328: Value* delim_maybe_code=params.count()>4?¶ms[4]:0;
1.1 paf 329:
1.57 paf 330: if(to-from>=MAX_LOOPS) // too long loop?
1.166 misha 331: throw Exception(PARSER_RUNTIME,
1.129 paf 332: 0,
1.57 paf 333: "endless loop detected");
334:
1.129 paf 335: VInt* vint=new VInt(0);
1.154 paf 336:
337: VMethodFrame& caller=*r.get_method_frame()->caller();
1.197 misha 338: caller.put_element(var_name, vint, false);
1.186 misha 339: if(delim_maybe_code){ // delimiter set
1.185 misha 340: bool need_delim=false;
341:
342: for(int i=from; i<=to; i++) {
343: vint->set_int(i);
344:
345: StringOrValue sv_processed=r.process(body_code);
346: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 misha 347:
1.185 misha 348: const String* s_processed=sv_processed.get_string();
1.186 misha 349: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 350: if(need_delim) // need delim & iteration produced string?
351: r.write_pass_lang(r.process(*delim_maybe_code));
352: else
353: need_delim=true;
354: }
355: r.write_pass_lang(sv_processed);
1.1 paf 356:
1.185 misha 357: if(lskip==Request::SKIP_BREAK)
358: break;
1.1 paf 359: }
1.185 misha 360: } else {
361: for(int i=from; i<=to; i++) {
362: vint->set_int(i);
363:
364: r.process_write(body_code);
365: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.164 paf 366:
1.185 misha 367: if(lskip==Request::SKIP_BREAK)
368: break;
369: }
1.1 paf 370: }
371: }
372:
1.129 paf 373: static void _eval(Request& r, MethodParams& params) {
374: Value& expr=params.as_junction(0, "need expression");
1.1 paf 375: // evaluate expresion
1.129 paf 376: Value& value_result=r.process_to_value(expr,
1.165 misha 377: false/*don't intercept string*/).as_expr_result();
1.129 paf 378: if(params.count()>1) {
1.177 misha 379: const String& fmt=params.as_string(1, "fmt must be string").trim();
380: if(fmt.is_empty()){
381: r.write_no_lang(value_result);
382: } else {
383: r.write_no_lang(String(format(value_result.as_double(), fmt.cstrm())));
384: }
1.91 paf 385: } else
1.129 paf 386: r.write_no_lang(value_result);
1.1 paf 387: }
388:
1.129 paf 389: static void _connect(Request& r, MethodParams& params) {
1.63 paf 390: #ifdef RESOURCES_DEBUG
391: struct timeval mt[2];
392: #endif
1.129 paf 393: Value& url=params.as_no_junction(0, "url must not be code");
394: Value& body_code=params.as_junction(1, "body must be code");
1.1 paf 395:
1.129 paf 396: Table* protocol2driver_and_client=0;
1.197 misha 397: if(Value* sql=r.main_class.get_element(String(MAIN_SQL_NAME))) {
398: if(Value* element=sql->get_element(String(MAIN_SQL_DRIVERS_NAME))) {
1.113 paf 399: protocol2driver_and_client=element->get_table();
400: }
401: }
1.11 paf 402:
1.63 paf 403: #ifdef RESOURCES_DEBUG
404: //measure:before
405: gettimeofday(&mt[0],NULL);
406: #endif
1.1 paf 407: // connect
1.142 paf 408: SQL_Connection* connection=SQL_driver_manager->get_connection(url.as_string(),
1.144 paf 409: protocol2driver_and_client,
1.180 misha 410: r.charsets.source().NAME().cstr(),
411: r.request_info.document_root);
1.1 paf 412:
1.63 paf 413: #ifdef RESOURCES_DEBUG
414: //measure:after connect
415: gettimeofday(&mt[1],NULL);
416:
417: double t[2];
418: for(int i=0;i<2;i++)
419: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
420:
421: r.sql_connect_time+=t[1]-t[0];
422: #endif
1.129 paf 423: Temp_connection temp_connection(r, connection);
1.1 paf 424: // execute body
1.53 parser 425: try {
1.189 misha 426: r.process_write(body_code);
1.129 paf 427: connection->commit();
428: connection->close();
1.75 paf 429: } catch(...) { // process problem
1.129 paf 430: connection->rollback();
431: connection->close();
432: rethrow;
1.1 paf 433: }
434: }
435:
1.41 parser 436: #ifndef DOXYGEN
1.129 paf 437: class Switch_data: public PA_Object {
438: public:
439: Request& r;
1.181 misha 440: const String* searching_string;
441: double searching_double;
1.207 misha 442: bool searching_bool;
1.129 paf 443: Value* found;
444: Value* _default;
445: public:
446: Switch_data(Request& ar, Value& asearching):
1.181 misha 447: r(ar)
448: {
449: if(asearching.is_string() || asearching.is_void()){
450: searching_string=&asearching.as_string();
451: searching_double=0;
1.207 misha 452: searching_bool=false;
1.181 misha 453: } else {
454: searching_string=0;
455: searching_double=asearching.as_double();
1.207 misha 456: searching_bool=asearching.is_bool();
1.181 misha 457: }
458: }
1.28 parser 459: };
1.41 parser 460: #endif
1.129 paf 461: static void _switch(Request& r, MethodParams& params) {
462: Switch_data* data=new Switch_data(r, r.process_to_value(params[0]));
1.135 paf 463: Temp_hash_value<const String::Body, void*>
1.129 paf 464: switch_data_setter(r.classes_conf, switch_data_name, data);
1.28 parser 465:
1.129 paf 466: Value& cases_code=params.as_junction(1, "switch cases must be code");
1.82 paf 467: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
468: // because of stacked WWrapper used there as wcontext
1.84 paf 469: r.process(cases_code, true/*intercept_string*/);
1.147 paf 470: if(Value* selected_code=data->found? data->found: data->_default)
1.107 paf 471: r.write_pass_lang(r.process(*selected_code));
1.28 parser 472: }
473:
1.129 paf 474: static void _case(Request& r, MethodParams& params) {
475: Switch_data* data=static_cast<Switch_data*>(r.classes_conf.get(switch_data_name));
1.38 parser 476: if(!data)
1.166 misha 477: throw Exception(PARSER_RUNTIME,
1.129 paf 478: 0,
1.38 parser 479: "without switch");
1.28 parser 480:
1.181 misha 481: if(data->found) // matches already was found
482: return;
483:
1.129 paf 484: int count=params.count();
1.184 misha 485: Value* code=¶ms.as_expression(--count, "case result must be code");
486:
487: #ifdef USE_DESTRUCTORS
488: Junction *j=code->get_junction();
489: if (j){
490: code=new VJunction(j->self,j->method,j->method_frame,j->rcontext,j->wcontext,j->code);
491: if (j->wcontext) j->wcontext->attach_junction((VJunction *)code);
492: }
493: #endif
1.83 paf 494:
1.181 misha 495: for(int i=0; i<count; i++){
1.129 paf 496: Value& value=r.process_to_value(params[i]);
1.28 parser 497:
1.181 misha 498: if(value.is_string() && value.as_string() == CASE_DEFAULT_VALUE){
1.184 misha 499: data->_default=code;
1.181 misha 500: continue;
1.28 parser 501: }
502:
503: bool matches;
1.181 misha 504: if(data->searching_string)
505: matches=(*data->searching_string) == value.as_string();
1.207 misha 506: else if(data->searching_bool || value.is_bool())
507: matches=(data->searching_double != 0) == value.as_bool();
1.28 parser 508: else
1.181 misha 509: matches=data->searching_double == value.as_double();
1.82 paf 510:
1.181 misha 511: if(matches){
1.184 misha 512: data->found=code;
1.28 parser 513: break;
514: }
515: }
516: }
1.136 paf 517: #ifndef DOXYGEN
518: struct Try_catch_result {
519: StringOrValue processed_code;
520: const String* exception_should_be_handled;
521:
522: Try_catch_result(): exception_should_be_handled(0) {}
523: };
524: #endif
525:
526: /// used by ^try and ^cache, @returns $exception.handled[string] if any
527: template<class I>
528: static Try_catch_result try_catch(Request& r,
529: StringOrValue body_code(Request&, I), I info,
1.179 misha 530: Value* catch_code,
531: bool could_be_handled_by_caller=false)
1.136 paf 532: {
533: Try_catch_result result;
1.179 misha 534:
1.136 paf 535: if(!catch_code) {
536: result.processed_code=body_code(r, info);
537: return result;
538: }
539:
540: // taking snapshot of try-context
541: Request_context_saver try_context(r);
542: try {
543: result.processed_code=body_code(r, info);
544: } catch(const Exception& e) {
545: Request_context_saver throw_context(r); // taking snapshot of throw-context [stack trace contains error]
546: Request::Exception_details details=r.get_details(e);
547: try_context.restore(); // restoring try-context to perform catch-code
548:
549: Junction* junction=catch_code->get_junction();
550: Value* method_frame=junction->method_frame;
1.197 misha 551: Value* saved_exception_var_value=method_frame->get_element(exception_var_name);
1.154 paf 552: VMethodFrame& frame=*junction->method_frame;
1.197 misha 553: frame.put_element(exception_var_name, &details.vhash, false);
1.179 misha 554:
1.136 paf 555: result.processed_code=r.process(*catch_code);
556:
557: // retriving $exception.handled, restoring $exception var
558: Value* vhandled=details.vhash.hash().get(exception_handled_part_name);
1.197 misha 559: frame.put_element(exception_var_name, saved_exception_var_value, false);
1.136 paf 560:
561: bool bhandled=false;
562: if(vhandled) {
563: if(vhandled->is_string()) { // not simple $exception.handled(1/0)?
1.160 paf 564: if(could_be_handled_by_caller) { // and we can possibly handle it
565: result.exception_should_be_handled=vhandled->get_string(); // considering 'recovered' and let the caller recover
566: return result;
567: }
568:
569: bhandled=false;
570: } else
1.179 misha 571: bhandled=vhandled->as_bool();
1.136 paf 572: }
573:
574: if(!bhandled) {
575: throw_context.restore(); // restoring throw-context [exception were not handled]
576: rethrow;
577: }
578: }
1.179 misha 579:
1.136 paf 580: return result;
581: }
1.28 parser 582:
1.63 paf 583: // cache--
584:
585: // consts
586:
1.152 paf 587: const int DATA_STRING_SERIALIZED_VERSION=0x0006;
1.63 paf 588:
589: // helper types
590:
591: #ifndef DOXYGEN
592: struct Data_string_serialized_prolog {
593: int version;
1.79 paf 594: time_t expires;
1.63 paf 595: };
596: #endif
597:
1.68 paf 598: void cache_delete(const String& file_spec) {
1.167 misha 599: file_delete(file_spec, false/*fail_on_problem*/);
1.63 paf 600: }
1.69 paf 601:
602: #ifndef DOXYGEN
1.135 paf 603: struct Cache_scope {
1.129 paf 604: public:
1.79 paf 605: time_t expires;
1.135 paf 606: const String* body_from_disk;
1.79 paf 607: };
1.69 paf 608: struct Locked_process_and_cache_put_action_info {
609: Request *r;
1.136 paf 610: Cache_scope *scope;
1.167 misha 611: Value* body_code;
612: Value* catch_code;
1.136 paf 613: const String* processed_code;
1.69 paf 614: };
615: #endif
1.136 paf 616:
617:
618:
619: static StringOrValue process_cache_body_code(Request& r, Value* body_code) {
1.153 paf 620: return StringOrValue(r.process_to_string(*body_code));
1.136 paf 621: }
622:
1.129 paf 623: /* @todo maybe network order worth spending some effort?
624: don't bothering myself with network byte order,
625: am not planning to be able to move resulting file across platforms
626: */
1.69 paf 627: static void locked_process_and_cache_put_action(int f, void *context) {
628: Locked_process_and_cache_put_action_info& info=
629: *static_cast<Locked_process_and_cache_put_action_info *>(context);
1.129 paf 630:
1.160 paf 631: const String* body_from_disk=info.scope->body_from_disk;
1.69 paf 632: // body->process
1.136 paf 633: Try_catch_result result=try_catch(*info.r,
634: process_cache_body_code, info.body_code,
1.160 paf 635: info.catch_code, body_from_disk!=0 /*we have something old=we can handle=recover later*/);
1.136 paf 636:
637: if(result.exception_should_be_handled) {
638: if(*result.exception_should_be_handled==CACHE_EXCEPTION_HANDLED_CACHE_NAME) {
1.160 paf 639: assert(body_from_disk);
640: info.processed_code=body_from_disk;
1.136 paf 641: } else
1.166 misha 642: throw Exception(PARSER_RUNTIME,
1.136 paf 643: result.exception_should_be_handled,
644: "$"EXCEPTION_VAR_NAME"."EXCEPTION_HANDLED_PART_NAME" value must be "
645: "either boolean or string '"CACHE_EXCEPTION_HANDLED_CACHE_NAME"'");
646: } else
647: info.processed_code=&result.processed_code.as_string();
1.69 paf 648:
1.79 paf 649: // expiration time not spoiled by ^cache(0) or something?
1.136 paf 650: if(info.scope->expires > time(0)) {
1.79 paf 651: // string -serialize> buffer
1.136 paf 652: String::Cm serialized=info.processed_code->serialize(
1.129 paf 653: sizeof(Data_string_serialized_prolog));
1.79 paf 654: Data_string_serialized_prolog& prolog=
1.129 paf 655: *reinterpret_cast<Data_string_serialized_prolog *>(serialized.str);
1.79 paf 656: prolog.version=DATA_STRING_SERIALIZED_VERSION;
1.136 paf 657: prolog.expires=info.scope->expires;
1.79 paf 658:
659: // buffer -write> file
1.129 paf 660: write(f, serialized.str, serialized.length);
1.79 paf 661: } else // expired!
1.136 paf 662: info.scope->expires=0; // flag it so that could be easily checked by caller
1.69 paf 663: }
1.129 paf 664: const String* locked_process_and_cache_put(Request& r,
1.128 paf 665: Value& body_code,
1.136 paf 666: Value* catch_code,
667: Cache_scope& scope,
668: const String& file_spec)
669: {
1.140 paf 670: Locked_process_and_cache_put_action_info info={&r, &scope, &body_code, catch_code, 0};
1.69 paf 671:
1.129 paf 672: const String* result=file_write_action_under_lock(
1.69 paf 673: file_spec,
1.168 misha 674: "cache_put",
675: locked_process_and_cache_put_action,
676: &info,
1.69 paf 677: false/*as_text*/,
678: false/*do_append*/,
1.173 misha 679: false/*block == don't wait till other thread release lock*/,
680: false/*dun throw exception if lock failed*/) ? info.processed_code: 0;
1.168 misha 681:
1.100 paf 682: time_t now=time(0);
1.136 paf 683: if(scope.expires<=now)
1.79 paf 684: cache_delete(file_spec);
685: return result;
1.63 paf 686: }
1.137 paf 687: #ifndef DOXYGEN
1.135 paf 688: struct Cache_get_result {
689: const String* body;
690: bool expired;
1.137 paf 691: };
692: #endif
693: static Cache_get_result cache_get(Request_charsets& charsets, const String& file_spec, time_t now) {
1.140 paf 694: Cache_get_result result={0, false};
1.135 paf 695:
1.129 paf 696: File_read_result file=file_read(charsets, file_spec,
1.63 paf 697: false/*as_text*/,
1.129 paf 698: 0, //no params
699: false/*fail_on_read_problem*/);
700: if(file.success && file.length/* ignore reads which are empty due to
1.72 paf 701: non-unary open+lockEX conflict with lockSH */) {
1.129 paf 702:
1.72 paf 703: Data_string_serialized_prolog& prolog=
1.129 paf 704: *reinterpret_cast<Data_string_serialized_prolog *>(file.str);
1.63 paf 705:
1.135 paf 706: String* body=new String;
1.72 paf 707: if(
1.129 paf 708: file.length>=sizeof(Data_string_serialized_prolog)
1.135 paf 709: && prolog.version==DATA_STRING_SERIALIZED_VERSION) {
710: if(body->deserialize(sizeof(Data_string_serialized_prolog), file.str, file.length)) {
711: result.body=body;
712: result.expired=prolog.expires <= now;
713: }
714: }
1.72 paf 715: }
1.63 paf 716:
1.135 paf 717: return result;
1.63 paf 718: }
1.129 paf 719: static time_t as_expires(Request& r, MethodParams& params,
1.79 paf 720: int index, time_t now) {
721: time_t result;
1.197 misha 722: if(Value* vdate=params[index].as(VDATE_TYPE))
1.129 paf 723: result=static_cast<VDate*>(vdate)->get_time();
1.79 paf 724: else
1.129 paf 725: result=now+(time_t)params.as_double(index, "lifespan must be date or number", r);
1.79 paf 726:
727: return result;
728: }
1.129 paf 729: static const String& as_file_spec(Request& r, MethodParams& params, int index) {
730: return r.absolute(params.as_string(index, "filespec must be string"));
1.79 paf 731: }
1.129 paf 732: static void _cache(Request& r, MethodParams& params) {
1.173 misha 733: if(params.count()==0) {
734: // ^cache[] -- return current expiration time
1.158 paf 735: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
736: if(!scope)
1.166 misha 737: throw Exception(PARSER_RUNTIME,
1.158 paf 738: 0,
739: "expire-time get without cache");
740: r.write_no_lang(*new VDate(scope->expires));
741: return;
742: }
743:
1.79 paf 744: time_t now=time(0);
745:
1.129 paf 746: if(params.count()==1) {
1.173 misha 747: // ^cache[filename] ^cache(seconds) ^cache[expires date]
1.129 paf 748: if(params[0].is_string()) { // filename?
1.79 paf 749: cache_delete(as_file_spec(r, params, 0));
750: return;
751: }
752:
753: // secods|expires date
1.135 paf 754: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
755: if(!scope)
1.166 misha 756: throw Exception(PARSER_RUNTIME,
1.129 paf 757: 0,
1.79 paf 758: "expire-time reducing instruction without cache");
759:
1.129 paf 760: time_t expires=as_expires(r, params, 0, now);
1.135 paf 761: if(expires < scope->expires)
762: scope->expires=expires;
1.79 paf 763:
764: return;
1.149 paf 765: } else if(params.count()<3)
1.166 misha 766: throw Exception(PARSER_RUNTIME,
1.149 paf 767: 0,
768: "invalid number of parameters");
1.63 paf 769:
770: // file_spec, expires, body code
1.172 misha 771: const String& file_spec=as_file_spec(r, params, 0);
1.65 paf 772:
1.141 paf 773: Cache_scope scope={as_expires(r, params, 1, now), 0};
1.135 paf 774:
775: Temp_hash_value<const String::Body, void*>
776: cache_scope_setter(r.classes_conf, cache_data_name, &scope);
1.136 paf 777: Value& body_code=params.as_junction(2, "body_code must be code");
778: Value* catch_code=0;
779: if(params.count()>3)
780: catch_code=¶ms.as_junction(3, "catch_code must be code");
1.63 paf 781:
1.168 misha 782: if(scope.expires>now) {
783: Cache_get_result cached=cache_get(r.charsets, file_spec, now);
1.69 paf 784:
1.168 misha 785: if(cached.body) { // have cached copy
1.174 misha 786: if(cached.expired) {
787: scope.body_from_disk=cached.body; // storing for user to retrive it with ^cache[]
788: } else {
789: // and it's not expired yet write it out
1.168 misha 790: r.write_assign_lang(*cached.body);
791: // happy with it
792: return;
793: }
794: }
795:
796: // no cached info or it's already expired
1.173 misha 797:
798: // trying to process it under lock and store result in file
1.174 misha 799: const String* processed_body=locked_process_and_cache_put(r, body_code, catch_code, scope, file_spec);
1.173 misha 800: if(processed_body){
1.174 misha 801: // write it out
802: r.write_assign_lang(*processed_body);
803: // happy with it
804: return;
1.173 misha 805: } else {
806: // we fail while get exclusive lock. nvm, we just execute body_code a bit later
1.174 misha 807: }
1.69 paf 808: } else {
1.79 paf 809: // instructed not to cache; forget cached copy
1.68 paf 810: cache_delete(file_spec);
1.69 paf 811: }
1.168 misha 812:
813: // process without cacheing
814: const String& processed_body=r.process_to_string(body_code);
815: // write it out
816: r.write_assign_lang(processed_body);
1.63 paf 817: }
818:
1.136 paf 819: static StringOrValue process_try_body_code(Request& r, Value* body_code) {
820: return r.process(*body_code);
821: }
1.129 paf 822: static void _try_operator(Request& r, MethodParams& params) {
823: Value& body_code=params.as_junction(0, "body_code must be code");
824: Value& catch_code=params.as_junction(1, "catch_code must be code");
1.179 misha 825: Value* finally_code=(params.count()==3) ? ¶ms.as_junction(2, "finally_code must be code") : 0;
826:
827: Try_catch_result result;
828: StringOrValue finally_result;
829: try{
830: result=try_catch(r,
831: process_try_body_code, &body_code,
832: &catch_code);
833: if(result.exception_should_be_handled)
834: throw Exception(PARSER_RUNTIME,
835: result.exception_should_be_handled,
836: "catch block must set $exception.handled to some boolean value, not string");
837: } catch(...){
838: if(finally_code)
839: finally_result=r.process(*finally_code);
840: rethrow;
841: }
1.74 paf 842:
1.179 misha 843: if(finally_code)
844: finally_result=r.process(*finally_code);
1.123 paf 845:
1.136 paf 846: // write out processed body_code or catch_code
847: r.write_pass_lang(result.processed_code);
1.179 misha 848:
849: // write out processed finally code
850: if(finally_code)
851: r.write_pass_lang(finally_result);
1.74 paf 852: }
853:
1.138 paf 854: static void _throw_operator(Request&, MethodParams& params) {
1.178 misha 855: if(params.count()==1 && !params[0].is_string()) {
1.129 paf 856: if(HashStringValue *hash=params[0].get_hash()) {
857: const char* type=0;
858: if(Value* value=hash->get(exception_type_part_name))
1.78 paf 859: type=value->as_string().cstr();
1.129 paf 860: const String* source=0;
861: if(Value* value=hash->get(exception_source_part_name))
1.74 paf 862: source=&value->as_string();
1.138 paf 863: const char* comment=0;
1.129 paf 864: if(Value* value=hash->get(exception_comment_part_name))
1.74 paf 865: comment=value->as_string().cstr();
866:
1.78 paf 867: throw Exception(type,
1.129 paf 868: source?source:0,
869: "%s", comment?comment:"");
1.74 paf 870: } else
1.166 misha 871: throw Exception(PARSER_RUNTIME,
1.129 paf 872: 0,
1.178 misha 873: "one-param version has hash or string param");
1.74 paf 874: } else {
1.129 paf 875: const char* type=params.as_string(0, "type must be string").cstr();
1.178 misha 876: const String* source=params.count()>1? ¶ms.as_string(1, "source must be string"):0;
877: const char* comment=params.count()>2? params.as_string(2, "comment must be string").cstr():0;
878: throw Exception(type, source, "%s", comment?comment:"");
1.74 paf 879: }
1.132 paf 880: }
1.129 paf 881:
1.150 paf 882: static void _sleep_operator(Request& r, MethodParams& params) {
883: double seconds=params.as_double(0, "seconds must be double", r);
1.206 moko 884: if(seconds>0)
885: pa_sleep((int)trunc(seconds), (int)trunc((seconds-trunc(seconds))*1000000));
1.150 paf 886: }
887:
1.129 paf 888: #if defined(WIN32) && defined(_DEBUG)
889: # define PA_BPT
1.138 paf 890: static void _bpt(Request&, MethodParams&) {
1.129 paf 891: _asm int 3;
892: }
893: #endif
894:
1.10 paf 895: // constructor
896:
1.129 paf 897: VClassMAIN::VClassMAIN(): VClass() {
898: set_name(*new String(MAIN_CLASS_NAME));
899:
900: #ifdef PA_BPT
901: // ^bpt[]
902: add_native_method("bpt", Method::CT_ANY, _bpt, 0, 0);
903: #endif
1.121 paf 904:
1.1 paf 905: // ^if(condition){code-when-true}
906: // ^if(condition){code-when-true}{code-when-false}
1.200 moko 907: // ^if(condition){code-when-true} (another condition){code-when-true} ... {code-when-false}
908: add_native_method("if", Method::CT_ANY, _if, 2, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 909:
1.194 misha 910: // ^untaint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
911: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 912:
1.194 misha 913: // ^taint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
914: add_native_method("taint", Method::CT_ANY, _taint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 915:
1.205 moko 916: // ^apply-taint[untaint lang][string]
917: add_native_method("apply-taint", Method::CT_ANY, _apply_taint, 1, 2, Method::CO_WITHOUT_FRAME);
918:
1.1 paf 919: // ^process[code]
1.146 paf 920: add_native_method("process", Method::CT_ANY, _process, 1, 3);
1.1 paf 921:
922: // ^rem{code}
1.185 misha 923: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 924:
925: // ^while(condition){code}
1.185 misha 926: add_native_method("while", Method::CT_ANY, _while, 2, 3, Method::CO_WITHOUT_FRAME);
1.1 paf 927:
928: // ^use[file]
1.10 paf 929: add_native_method("use", Method::CT_ANY, _use, 1, 1);
1.1 paf 930:
1.164 paf 931: // ^break[]
1.185 misha 932: add_native_method("break", Method::CT_ANY, _break, 0, 0, Method::CO_WITHOUT_FRAME);
933:
1.164 paf 934: // ^continue[]
1.185 misha 935: add_native_method("continue", Method::CT_ANY, _continue, 0, 0, Method::CO_WITHOUT_FRAME);
936:
1.54 paf 937: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.185 misha 938: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1, Method::CO_WITHOUT_WCONTEXT);
1.1 paf 939:
940: // ^eval(expr)
941: // ^eval(expr)[format]
1.185 misha 942: add_native_method("eval", Method::CT_ANY, _eval, 1, 2, Method::CO_WITHOUT_FRAME);
1.52 parser 943:
1.1 paf 944: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 945: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
946:
1.63 paf 947:
1.136 paf 948: // ^cache[file_spec](time){code}[{catch code}] time=0 no cache
1.65 paf 949: // ^cache[file_spec] delete cache
1.161 paf 950: // ^cache[] get current expiration time
951: add_native_method("cache", Method::CT_ANY, _cache, 0, 4);
1.63 paf 952:
1.28 parser 953: // switch
954:
955: // ^switch[value]{cases}
1.185 misha 956: add_native_method("switch", Method::CT_ANY, _switch, 2, 2, Method::CO_WITHOUT_FRAME);
1.28 parser 957:
958: // ^case[value]{code}
1.185 misha 959: add_native_method("case", Method::CT_ANY, _case, 2, 10000, Method::CO_WITHOUT_FRAME);
1.74 paf 960:
961: // try-catch
962:
963: // ^try{code}{catch code}
1.185 misha 964: add_native_method("try", Method::CT_ANY, _try_operator, 2, 3, Method::CO_WITHOUT_FRAME);
1.74 paf 965: // ^throw[$exception hash]
966: // ^throw[type;source;comment]
967: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
968:
1.150 paf 969: add_native_method("sleep", Method::CT_ANY, _sleep_operator, 1, 1);
1.10 paf 970: }
1.11 paf 971:
972: // constructor & configurator
1.1 paf 973:
1.129 paf 974: VStateless_class& VClassMAIN_create() {
975: return *new VClassMAIN;
1.1 paf 976: }
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