Annotation of parser3/src/classes/op.C, revision 1.204
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:
1.204 ! misha 8: static const char * const IDENT_OP_C="$Date: 2010-08-01 15:23:19 $";
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));
1.198 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:
1.129 paf 148: static void _process(Request& r, MethodParams& params) {
149: Method* main_method;
150:
151: size_t index=0;
152: Value* target_self;
153: Value& maybe_target_self=params[index];
154: if(maybe_target_self.get_string() || maybe_target_self.get_junction())
155: target_self=&r.get_method_frame()->caller()->self();
156: else {
157: target_self=&maybe_target_self; index++;
158: }
159:
1.1 paf 160: {
1.197 misha 161: VStateless_class *target_class=target_self->get_class();
1.116 paf 162: if(!target_class)
1.166 misha 163: throw Exception(PARSER_RUNTIME,
1.129 paf 164: 0,
1.116 paf 165: "no target class");
1.114 paf 166:
1.73 paf 167: // temporary remove language change
1.192 misha 168: Temp_lang temp_lang(r, String::L_PARSER_CODE);
1.1 paf 169: // temporary zero @main so to maybe-replace it in processed code
1.129 paf 170: Temp_method temp_method_main(*target_class, main_method_name, 0);
1.1 paf 171: // temporary zero @auto so it wouldn't be auto-called in Request::use_buf
1.129 paf 172: Temp_method temp_method_auto(*target_class, auto_method_name, 0);
173:
1.146 paf 174: size_t options_index=index+1;
175: HashStringValue* options=0;
176: if(options_index<params.count()) {
1.195 misha 177: Value& voptions=params.as_no_junction(options_index, OPTIONS_MUST_NOT_BE_CODE);
1.146 paf 178: options=voptions.get_hash();
179: if(!options)
1.201 misha 180: throw Exception(PARSER_RUNTIME, 0, OPTIONS_MUST_BE_HASH);
1.146 paf 181: }
182:
1.129 paf 183: const String* main_alias=0;
1.146 paf 184: const String* file_alias=0;
185: int line_no_alias_offset=0;
186: if(options) {
187: int valid_options=0;
188: if(Value* vmain_alias=options->get(PROCESS_MAIN_OPTION_NAME)) {
189: valid_options++;
190: main_alias=&vmain_alias->as_string();
191: }
192: if(Value* vfile_alias=options->get(PROCESS_FILE_OPTION_NAME)) {
193: valid_options++;
194: file_alias=&vfile_alias->as_string();
195: }
196: if(Value* vline_no_alias_offset=options->get(PROCESS_LINENO_OPTION_NAME)) {
197: valid_options++;
198: line_no_alias_offset=vline_no_alias_offset->as_int();
199: }
200:
201: if(valid_options!=options->count())
1.201 misha 202: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
1.146 paf 203: }
1.129 paf 204:
1.146 paf 205: uint processe_file_no=file_alias?
206: r.register_file(r.absolute(*file_alias))
207: : pseudo_file_no__process;
208: // process...{string}
209: Value& vjunction=params.as_junction(index, "body must be code");
210: // evaluate source to process
211: const String& source=r.process_to_string(vjunction);
212: r.use_buf(*target_class,
1.190 misha 213: source.untaint_cstr(String::L_AS_IS, r.connection(false)),
1.146 paf 214: main_alias,
215: processe_file_no,
216: line_no_alias_offset);
1.1 paf 217:
1.73 paf 218: // main_method
1.129 paf 219: main_method=target_class->get_method(main_method_name);
1.73 paf 220: }
221: // after restoring current-request-lang
222: // maybe-execute @main[]
223: if(main_method) {
1.202 moko 224: VMethodFrame frame(*main_method, r.get_method_frame()->caller(), *target_self);
225: frame.empty_params();
1.203 moko 226: r.op_call(frame);
227: r.write_pass_lang(frame.result());
1.1 paf 228: }
229: }
230:
1.138 paf 231: static void _rem(Request&, MethodParams& params) {
1.129 paf 232: params.as_junction(0, "body must be code");
1.1 paf 233: }
234:
1.129 paf 235: static void _while(Request& r, MethodParams& params) {
1.196 misha 236: InCycle temp(r);
1.164 paf 237:
1.170 misha 238: Value& vcondition=params.as_expression(0, "condition must be number, bool or expression");
239:
1.162 paf 240: Value& body_code=params.as_junction(1, "body must be code");
241: Value* delim_maybe_code=params.count()>2?¶ms[2]:0;
1.1 paf 242:
243: // while...
244: int endless_loop_count=0;
1.186 misha 245: if(delim_maybe_code){ // delimiter set
1.185 misha 246: bool need_delim=false;
247: while(true) {
248: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
249: throw Exception(PARSER_RUNTIME,
250: 0,
251: "endless loop detected");
252:
253: if(!r.process_to_value(vcondition, false/*don't intercept string*/).as_bool())
254: break;
1.1 paf 255:
1.185 misha 256: StringOrValue sv_processed=r.process(body_code);
257: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 misha 258:
1.185 misha 259: const String* s_processed=sv_processed.get_string();
1.186 misha 260: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 261: if(need_delim) // need delim & iteration produced string?
262: r.write_pass_lang(r.process(*delim_maybe_code));
263: else
264: need_delim=true;
265: }
266: r.write_pass_lang(sv_processed);
1.1 paf 267:
1.185 misha 268: if(lskip==Request::SKIP_BREAK)
269: break;
1.162 paf 270: }
1.185 misha 271: } else {
272: while(true) {
273: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
274: throw Exception(PARSER_RUNTIME,
275: 0,
276: "endless loop detected");
277:
278: if(!r.process_to_value(vcondition, false/*don't intercept string*/).as_bool())
279: break;
1.164 paf 280:
1.185 misha 281: r.process_write(body_code);
282: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
283:
284: if(lskip==Request::SKIP_BREAK)
285: break;
286: }
1.1 paf 287: }
288: }
289:
1.129 paf 290: static void _use(Request& r, MethodParams& params) {
1.171 misha 291: Value& vfile=params.as_no_junction(0, FILE_NAME_MUST_NOT_BE_CODE);
1.199 misha 292:
293: // _use could be called from the parser3 method only, so caller is always defined
1.202 moko 294: r.use_file(r.main_class, vfile.as_string(), r.get_method_filename(&r.get_method_frame()->caller()->method));
1.1 paf 295: }
296:
1.164 paf 297: static void set_skip(Request& r, Request::Skip askip) {
1.196 misha 298: if(!r.get_in_cycle())
1.166 misha 299: throw Exception(PARSER_RUNTIME,
1.164 paf 300: 0,
301: "without cycle");
302:
303: r.set_skip(askip);
304: }
305:
306: static void _break(Request& r, MethodParams&) {
307: set_skip(r, Request::SKIP_BREAK);
308: }
309:
310: static void _continue(Request& r, MethodParams&) {
311: set_skip(r, Request::SKIP_CONTINUE);
312: }
313:
1.129 paf 314: static void _for(Request& r, MethodParams& params) {
1.196 misha 315: InCycle temp(r);
1.164 paf 316:
1.129 paf 317: const String& var_name=params.as_string(0, "var name must be string");
318: int from=params.as_int(1, "from must be int", r);
319: int to=params.as_int(2, "to must be int", r);
1.186 misha 320: Value& body_code=params.as_junction(3, "body must be code");
1.129 paf 321: Value* delim_maybe_code=params.count()>4?¶ms[4]:0;
1.1 paf 322:
1.57 paf 323: if(to-from>=MAX_LOOPS) // too long loop?
1.166 misha 324: throw Exception(PARSER_RUNTIME,
1.129 paf 325: 0,
1.57 paf 326: "endless loop detected");
327:
1.129 paf 328: VInt* vint=new VInt(0);
1.154 paf 329:
330: VMethodFrame& caller=*r.get_method_frame()->caller();
1.197 misha 331: caller.put_element(var_name, vint, false);
1.186 misha 332: if(delim_maybe_code){ // delimiter set
1.185 misha 333: bool need_delim=false;
334:
335: for(int i=from; i<=to; i++) {
336: vint->set_int(i);
337:
338: StringOrValue sv_processed=r.process(body_code);
339: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 misha 340:
1.185 misha 341: const String* s_processed=sv_processed.get_string();
1.186 misha 342: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 343: if(need_delim) // need delim & iteration produced string?
344: r.write_pass_lang(r.process(*delim_maybe_code));
345: else
346: need_delim=true;
347: }
348: r.write_pass_lang(sv_processed);
1.1 paf 349:
1.185 misha 350: if(lskip==Request::SKIP_BREAK)
351: break;
1.1 paf 352: }
1.185 misha 353: } else {
354: for(int i=from; i<=to; i++) {
355: vint->set_int(i);
356:
357: r.process_write(body_code);
358: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.164 paf 359:
1.185 misha 360: if(lskip==Request::SKIP_BREAK)
361: break;
362: }
1.1 paf 363: }
364: }
365:
1.129 paf 366: static void _eval(Request& r, MethodParams& params) {
367: Value& expr=params.as_junction(0, "need expression");
1.1 paf 368: // evaluate expresion
1.129 paf 369: Value& value_result=r.process_to_value(expr,
1.165 misha 370: false/*don't intercept string*/).as_expr_result();
1.129 paf 371: if(params.count()>1) {
1.177 misha 372: const String& fmt=params.as_string(1, "fmt must be string").trim();
373: if(fmt.is_empty()){
374: r.write_no_lang(value_result);
375: } else {
376: r.write_no_lang(String(format(value_result.as_double(), fmt.cstrm())));
377: }
1.91 paf 378: } else
1.129 paf 379: r.write_no_lang(value_result);
1.1 paf 380: }
381:
1.129 paf 382: static void _connect(Request& r, MethodParams& params) {
1.63 paf 383: #ifdef RESOURCES_DEBUG
384: struct timeval mt[2];
385: #endif
1.129 paf 386: Value& url=params.as_no_junction(0, "url must not be code");
387: Value& body_code=params.as_junction(1, "body must be code");
1.1 paf 388:
1.129 paf 389: Table* protocol2driver_and_client=0;
1.197 misha 390: if(Value* sql=r.main_class.get_element(String(MAIN_SQL_NAME))) {
391: if(Value* element=sql->get_element(String(MAIN_SQL_DRIVERS_NAME))) {
1.113 paf 392: protocol2driver_and_client=element->get_table();
393: }
394: }
1.11 paf 395:
1.63 paf 396: #ifdef RESOURCES_DEBUG
397: //measure:before
398: gettimeofday(&mt[0],NULL);
399: #endif
1.1 paf 400: // connect
1.142 paf 401: SQL_Connection* connection=SQL_driver_manager->get_connection(url.as_string(),
1.144 paf 402: protocol2driver_and_client,
1.180 misha 403: r.charsets.source().NAME().cstr(),
404: r.request_info.document_root);
1.1 paf 405:
1.63 paf 406: #ifdef RESOURCES_DEBUG
407: //measure:after connect
408: gettimeofday(&mt[1],NULL);
409:
410: double t[2];
411: for(int i=0;i<2;i++)
412: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
413:
414: r.sql_connect_time+=t[1]-t[0];
415: #endif
1.129 paf 416: Temp_connection temp_connection(r, connection);
1.1 paf 417: // execute body
1.53 parser 418: try {
1.189 misha 419: r.process_write(body_code);
1.129 paf 420: connection->commit();
421: connection->close();
1.75 paf 422: } catch(...) { // process problem
1.129 paf 423: connection->rollback();
424: connection->close();
425: rethrow;
1.1 paf 426: }
427: }
428:
1.41 parser 429: #ifndef DOXYGEN
1.129 paf 430: class Switch_data: public PA_Object {
431: public:
432: Request& r;
1.181 misha 433: const String* searching_string;
434: double searching_double;
1.129 paf 435: Value* found;
436: Value* _default;
437: public:
438: Switch_data(Request& ar, Value& asearching):
1.181 misha 439: r(ar)
440: {
441: if(asearching.is_string() || asearching.is_void()){
442: searching_string=&asearching.as_string();
443: searching_double=0;
444: } else {
445: searching_string=0;
446: searching_double=asearching.as_double();
447: }
448: }
1.28 parser 449: };
1.41 parser 450: #endif
1.129 paf 451: static void _switch(Request& r, MethodParams& params) {
452: Switch_data* data=new Switch_data(r, r.process_to_value(params[0]));
1.135 paf 453: Temp_hash_value<const String::Body, void*>
1.129 paf 454: switch_data_setter(r.classes_conf, switch_data_name, data);
1.28 parser 455:
1.129 paf 456: Value& cases_code=params.as_junction(1, "switch cases must be code");
1.82 paf 457: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
458: // because of stacked WWrapper used there as wcontext
1.84 paf 459: r.process(cases_code, true/*intercept_string*/);
1.147 paf 460: if(Value* selected_code=data->found? data->found: data->_default)
1.107 paf 461: r.write_pass_lang(r.process(*selected_code));
1.28 parser 462: }
463:
1.129 paf 464: static void _case(Request& r, MethodParams& params) {
465: Switch_data* data=static_cast<Switch_data*>(r.classes_conf.get(switch_data_name));
1.38 parser 466: if(!data)
1.166 misha 467: throw Exception(PARSER_RUNTIME,
1.129 paf 468: 0,
1.38 parser 469: "without switch");
1.28 parser 470:
1.181 misha 471: if(data->found) // matches already was found
472: return;
473:
1.129 paf 474: int count=params.count();
1.184 misha 475: Value* code=¶ms.as_expression(--count, "case result must be code");
476:
477: #ifdef USE_DESTRUCTORS
478: Junction *j=code->get_junction();
479: if (j){
480: code=new VJunction(j->self,j->method,j->method_frame,j->rcontext,j->wcontext,j->code);
481: if (j->wcontext) j->wcontext->attach_junction((VJunction *)code);
482: }
483: #endif
1.83 paf 484:
1.181 misha 485: for(int i=0; i<count; i++){
1.129 paf 486: Value& value=r.process_to_value(params[i]);
1.28 parser 487:
1.181 misha 488: if(value.is_string() && value.as_string() == CASE_DEFAULT_VALUE){
1.184 misha 489: data->_default=code;
1.181 misha 490: continue;
1.28 parser 491: }
492:
493: bool matches;
1.181 misha 494: if(data->searching_string)
495: matches=(*data->searching_string) == value.as_string();
1.28 parser 496: else
1.181 misha 497: matches=data->searching_double == value.as_double();
1.82 paf 498:
1.181 misha 499: if(matches){
1.184 misha 500: data->found=code;
1.28 parser 501: break;
502: }
503: }
504: }
1.136 paf 505: #ifndef DOXYGEN
506: struct Try_catch_result {
507: StringOrValue processed_code;
508: const String* exception_should_be_handled;
509:
510: Try_catch_result(): exception_should_be_handled(0) {}
511: };
512: #endif
513:
514: /// used by ^try and ^cache, @returns $exception.handled[string] if any
515: template<class I>
516: static Try_catch_result try_catch(Request& r,
517: StringOrValue body_code(Request&, I), I info,
1.179 misha 518: Value* catch_code,
519: bool could_be_handled_by_caller=false)
1.136 paf 520: {
521: Try_catch_result result;
1.179 misha 522:
1.136 paf 523: if(!catch_code) {
524: result.processed_code=body_code(r, info);
525: return result;
526: }
527:
528: // taking snapshot of try-context
529: Request_context_saver try_context(r);
530: try {
531: result.processed_code=body_code(r, info);
532: } catch(const Exception& e) {
533: Request_context_saver throw_context(r); // taking snapshot of throw-context [stack trace contains error]
534: Request::Exception_details details=r.get_details(e);
535: try_context.restore(); // restoring try-context to perform catch-code
536:
537: Junction* junction=catch_code->get_junction();
538: Value* method_frame=junction->method_frame;
1.197 misha 539: Value* saved_exception_var_value=method_frame->get_element(exception_var_name);
1.154 paf 540: VMethodFrame& frame=*junction->method_frame;
1.197 misha 541: frame.put_element(exception_var_name, &details.vhash, false);
1.179 misha 542:
1.136 paf 543: result.processed_code=r.process(*catch_code);
544:
545: // retriving $exception.handled, restoring $exception var
546: Value* vhandled=details.vhash.hash().get(exception_handled_part_name);
1.197 misha 547: frame.put_element(exception_var_name, saved_exception_var_value, false);
1.136 paf 548:
549: bool bhandled=false;
550: if(vhandled) {
551: if(vhandled->is_string()) { // not simple $exception.handled(1/0)?
1.160 paf 552: if(could_be_handled_by_caller) { // and we can possibly handle it
553: result.exception_should_be_handled=vhandled->get_string(); // considering 'recovered' and let the caller recover
554: return result;
555: }
556:
557: bhandled=false;
558: } else
1.179 misha 559: bhandled=vhandled->as_bool();
1.136 paf 560: }
561:
562: if(!bhandled) {
563: throw_context.restore(); // restoring throw-context [exception were not handled]
564: rethrow;
565: }
566: }
1.179 misha 567:
1.136 paf 568: return result;
569: }
1.28 parser 570:
1.63 paf 571: // cache--
572:
573: // consts
574:
1.152 paf 575: const int DATA_STRING_SERIALIZED_VERSION=0x0006;
1.63 paf 576:
577: // helper types
578:
579: #ifndef DOXYGEN
580: struct Data_string_serialized_prolog {
581: int version;
1.79 paf 582: time_t expires;
1.63 paf 583: };
584: #endif
585:
1.68 paf 586: void cache_delete(const String& file_spec) {
1.167 misha 587: file_delete(file_spec, false/*fail_on_problem*/);
1.63 paf 588: }
1.69 paf 589:
590: #ifndef DOXYGEN
1.135 paf 591: struct Cache_scope {
1.129 paf 592: public:
1.79 paf 593: time_t expires;
1.135 paf 594: const String* body_from_disk;
1.79 paf 595: };
1.69 paf 596: struct Locked_process_and_cache_put_action_info {
597: Request *r;
1.136 paf 598: Cache_scope *scope;
1.167 misha 599: Value* body_code;
600: Value* catch_code;
1.136 paf 601: const String* processed_code;
1.69 paf 602: };
603: #endif
1.136 paf 604:
605:
606:
607: static StringOrValue process_cache_body_code(Request& r, Value* body_code) {
1.153 paf 608: return StringOrValue(r.process_to_string(*body_code));
1.136 paf 609: }
610:
1.129 paf 611: /* @todo maybe network order worth spending some effort?
612: don't bothering myself with network byte order,
613: am not planning to be able to move resulting file across platforms
614: */
1.69 paf 615: static void locked_process_and_cache_put_action(int f, void *context) {
616: Locked_process_and_cache_put_action_info& info=
617: *static_cast<Locked_process_and_cache_put_action_info *>(context);
1.129 paf 618:
1.160 paf 619: const String* body_from_disk=info.scope->body_from_disk;
1.69 paf 620: // body->process
1.136 paf 621: Try_catch_result result=try_catch(*info.r,
622: process_cache_body_code, info.body_code,
1.160 paf 623: info.catch_code, body_from_disk!=0 /*we have something old=we can handle=recover later*/);
1.136 paf 624:
625: if(result.exception_should_be_handled) {
626: if(*result.exception_should_be_handled==CACHE_EXCEPTION_HANDLED_CACHE_NAME) {
1.160 paf 627: assert(body_from_disk);
628: info.processed_code=body_from_disk;
1.136 paf 629: } else
1.166 misha 630: throw Exception(PARSER_RUNTIME,
1.136 paf 631: result.exception_should_be_handled,
632: "$"EXCEPTION_VAR_NAME"."EXCEPTION_HANDLED_PART_NAME" value must be "
633: "either boolean or string '"CACHE_EXCEPTION_HANDLED_CACHE_NAME"'");
634: } else
635: info.processed_code=&result.processed_code.as_string();
1.69 paf 636:
1.79 paf 637: // expiration time not spoiled by ^cache(0) or something?
1.136 paf 638: if(info.scope->expires > time(0)) {
1.79 paf 639: // string -serialize> buffer
1.136 paf 640: String::Cm serialized=info.processed_code->serialize(
1.129 paf 641: sizeof(Data_string_serialized_prolog));
1.79 paf 642: Data_string_serialized_prolog& prolog=
1.129 paf 643: *reinterpret_cast<Data_string_serialized_prolog *>(serialized.str);
1.79 paf 644: prolog.version=DATA_STRING_SERIALIZED_VERSION;
1.136 paf 645: prolog.expires=info.scope->expires;
1.79 paf 646:
647: // buffer -write> file
1.129 paf 648: write(f, serialized.str, serialized.length);
1.79 paf 649: } else // expired!
1.136 paf 650: info.scope->expires=0; // flag it so that could be easily checked by caller
1.69 paf 651: }
1.129 paf 652: const String* locked_process_and_cache_put(Request& r,
1.128 paf 653: Value& body_code,
1.136 paf 654: Value* catch_code,
655: Cache_scope& scope,
656: const String& file_spec)
657: {
1.140 paf 658: Locked_process_and_cache_put_action_info info={&r, &scope, &body_code, catch_code, 0};
1.69 paf 659:
1.129 paf 660: const String* result=file_write_action_under_lock(
1.69 paf 661: file_spec,
1.168 misha 662: "cache_put",
663: locked_process_and_cache_put_action,
664: &info,
1.69 paf 665: false/*as_text*/,
666: false/*do_append*/,
1.173 misha 667: false/*block == don't wait till other thread release lock*/,
668: false/*dun throw exception if lock failed*/) ? info.processed_code: 0;
1.168 misha 669:
1.100 paf 670: time_t now=time(0);
1.136 paf 671: if(scope.expires<=now)
1.79 paf 672: cache_delete(file_spec);
673: return result;
1.63 paf 674: }
1.137 paf 675: #ifndef DOXYGEN
1.135 paf 676: struct Cache_get_result {
677: const String* body;
678: bool expired;
1.137 paf 679: };
680: #endif
681: static Cache_get_result cache_get(Request_charsets& charsets, const String& file_spec, time_t now) {
1.140 paf 682: Cache_get_result result={0, false};
1.135 paf 683:
1.129 paf 684: File_read_result file=file_read(charsets, file_spec,
1.63 paf 685: false/*as_text*/,
1.129 paf 686: 0, //no params
687: false/*fail_on_read_problem*/);
688: if(file.success && file.length/* ignore reads which are empty due to
1.72 paf 689: non-unary open+lockEX conflict with lockSH */) {
1.129 paf 690:
1.72 paf 691: Data_string_serialized_prolog& prolog=
1.129 paf 692: *reinterpret_cast<Data_string_serialized_prolog *>(file.str);
1.63 paf 693:
1.135 paf 694: String* body=new String;
1.72 paf 695: if(
1.129 paf 696: file.length>=sizeof(Data_string_serialized_prolog)
1.135 paf 697: && prolog.version==DATA_STRING_SERIALIZED_VERSION) {
698: if(body->deserialize(sizeof(Data_string_serialized_prolog), file.str, file.length)) {
699: result.body=body;
700: result.expired=prolog.expires <= now;
701: }
702: }
1.72 paf 703: }
1.63 paf 704:
1.135 paf 705: return result;
1.63 paf 706: }
1.129 paf 707: static time_t as_expires(Request& r, MethodParams& params,
1.79 paf 708: int index, time_t now) {
709: time_t result;
1.197 misha 710: if(Value* vdate=params[index].as(VDATE_TYPE))
1.129 paf 711: result=static_cast<VDate*>(vdate)->get_time();
1.79 paf 712: else
1.129 paf 713: result=now+(time_t)params.as_double(index, "lifespan must be date or number", r);
1.79 paf 714:
715: return result;
716: }
1.129 paf 717: static const String& as_file_spec(Request& r, MethodParams& params, int index) {
718: return r.absolute(params.as_string(index, "filespec must be string"));
1.79 paf 719: }
1.129 paf 720: static void _cache(Request& r, MethodParams& params) {
1.173 misha 721: if(params.count()==0) {
722: // ^cache[] -- return current expiration time
1.158 paf 723: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
724: if(!scope)
1.166 misha 725: throw Exception(PARSER_RUNTIME,
1.158 paf 726: 0,
727: "expire-time get without cache");
728: r.write_no_lang(*new VDate(scope->expires));
729: return;
730: }
731:
1.79 paf 732: time_t now=time(0);
733:
1.129 paf 734: if(params.count()==1) {
1.173 misha 735: // ^cache[filename] ^cache(seconds) ^cache[expires date]
1.129 paf 736: if(params[0].is_string()) { // filename?
1.79 paf 737: cache_delete(as_file_spec(r, params, 0));
738: return;
739: }
740:
741: // secods|expires date
1.135 paf 742: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
743: if(!scope)
1.166 misha 744: throw Exception(PARSER_RUNTIME,
1.129 paf 745: 0,
1.79 paf 746: "expire-time reducing instruction without cache");
747:
1.129 paf 748: time_t expires=as_expires(r, params, 0, now);
1.135 paf 749: if(expires < scope->expires)
750: scope->expires=expires;
1.79 paf 751:
752: return;
1.149 paf 753: } else if(params.count()<3)
1.166 misha 754: throw Exception(PARSER_RUNTIME,
1.149 paf 755: 0,
756: "invalid number of parameters");
1.63 paf 757:
758: // file_spec, expires, body code
1.172 misha 759: const String& file_spec=as_file_spec(r, params, 0);
1.65 paf 760:
1.141 paf 761: Cache_scope scope={as_expires(r, params, 1, now), 0};
1.135 paf 762:
763: Temp_hash_value<const String::Body, void*>
764: cache_scope_setter(r.classes_conf, cache_data_name, &scope);
1.136 paf 765: Value& body_code=params.as_junction(2, "body_code must be code");
766: Value* catch_code=0;
767: if(params.count()>3)
768: catch_code=¶ms.as_junction(3, "catch_code must be code");
1.63 paf 769:
1.168 misha 770: if(scope.expires>now) {
771: Cache_get_result cached=cache_get(r.charsets, file_spec, now);
1.69 paf 772:
1.168 misha 773: if(cached.body) { // have cached copy
1.174 misha 774: if(cached.expired) {
775: scope.body_from_disk=cached.body; // storing for user to retrive it with ^cache[]
776: } else {
777: // and it's not expired yet write it out
1.168 misha 778: r.write_assign_lang(*cached.body);
779: // happy with it
780: return;
781: }
782: }
783:
784: // no cached info or it's already expired
1.173 misha 785:
786: // trying to process it under lock and store result in file
1.174 misha 787: const String* processed_body=locked_process_and_cache_put(r, body_code, catch_code, scope, file_spec);
1.173 misha 788: if(processed_body){
1.174 misha 789: // write it out
790: r.write_assign_lang(*processed_body);
791: // happy with it
792: return;
1.173 misha 793: } else {
794: // we fail while get exclusive lock. nvm, we just execute body_code a bit later
1.174 misha 795: }
1.69 paf 796: } else {
1.79 paf 797: // instructed not to cache; forget cached copy
1.68 paf 798: cache_delete(file_spec);
1.69 paf 799: }
1.168 misha 800:
801: // process without cacheing
802: const String& processed_body=r.process_to_string(body_code);
803: // write it out
804: r.write_assign_lang(processed_body);
1.63 paf 805: }
806:
1.136 paf 807: static StringOrValue process_try_body_code(Request& r, Value* body_code) {
808: return r.process(*body_code);
809: }
1.129 paf 810: static void _try_operator(Request& r, MethodParams& params) {
811: Value& body_code=params.as_junction(0, "body_code must be code");
812: Value& catch_code=params.as_junction(1, "catch_code must be code");
1.179 misha 813: Value* finally_code=(params.count()==3) ? ¶ms.as_junction(2, "finally_code must be code") : 0;
814:
815: Try_catch_result result;
816: StringOrValue finally_result;
817: try{
818: result=try_catch(r,
819: process_try_body_code, &body_code,
820: &catch_code);
821: if(result.exception_should_be_handled)
822: throw Exception(PARSER_RUNTIME,
823: result.exception_should_be_handled,
824: "catch block must set $exception.handled to some boolean value, not string");
825: } catch(...){
826: if(finally_code)
827: finally_result=r.process(*finally_code);
828: rethrow;
829: }
1.74 paf 830:
1.179 misha 831: if(finally_code)
832: finally_result=r.process(*finally_code);
1.123 paf 833:
1.136 paf 834: // write out processed body_code or catch_code
835: r.write_pass_lang(result.processed_code);
1.179 misha 836:
837: // write out processed finally code
838: if(finally_code)
839: r.write_pass_lang(finally_result);
1.74 paf 840: }
841:
1.138 paf 842: static void _throw_operator(Request&, MethodParams& params) {
1.178 misha 843: if(params.count()==1 && !params[0].is_string()) {
1.129 paf 844: if(HashStringValue *hash=params[0].get_hash()) {
845: const char* type=0;
846: if(Value* value=hash->get(exception_type_part_name))
1.78 paf 847: type=value->as_string().cstr();
1.129 paf 848: const String* source=0;
849: if(Value* value=hash->get(exception_source_part_name))
1.74 paf 850: source=&value->as_string();
1.138 paf 851: const char* comment=0;
1.129 paf 852: if(Value* value=hash->get(exception_comment_part_name))
1.74 paf 853: comment=value->as_string().cstr();
854:
1.78 paf 855: throw Exception(type,
1.129 paf 856: source?source:0,
857: "%s", comment?comment:"");
1.74 paf 858: } else
1.166 misha 859: throw Exception(PARSER_RUNTIME,
1.129 paf 860: 0,
1.178 misha 861: "one-param version has hash or string param");
1.74 paf 862: } else {
1.129 paf 863: const char* type=params.as_string(0, "type must be string").cstr();
1.178 misha 864: const String* source=params.count()>1? ¶ms.as_string(1, "source must be string"):0;
865: const char* comment=params.count()>2? params.as_string(2, "comment must be string").cstr():0;
866: throw Exception(type, source, "%s", comment?comment:"");
1.74 paf 867: }
1.132 paf 868: }
1.129 paf 869:
1.150 paf 870: static void _sleep_operator(Request& r, MethodParams& params) {
871: double seconds=params.as_double(0, "seconds must be double", r);
1.151 paf 872: pa_sleep((int)trunc(seconds), (int)trunc(seconds*1000));
1.150 paf 873: }
874:
1.129 paf 875: #if defined(WIN32) && defined(_DEBUG)
876: # define PA_BPT
1.138 paf 877: static void _bpt(Request&, MethodParams&) {
1.129 paf 878: _asm int 3;
879: }
880: #endif
881:
1.10 paf 882: // constructor
883:
1.129 paf 884: VClassMAIN::VClassMAIN(): VClass() {
885: set_name(*new String(MAIN_CLASS_NAME));
886:
887: #ifdef PA_BPT
888: // ^bpt[]
889: add_native_method("bpt", Method::CT_ANY, _bpt, 0, 0);
890: #endif
1.121 paf 891:
1.1 paf 892: // ^if(condition){code-when-true}
893: // ^if(condition){code-when-true}{code-when-false}
1.200 moko 894: // ^if(condition){code-when-true} (another condition){code-when-true} ... {code-when-false}
895: add_native_method("if", Method::CT_ANY, _if, 2, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 896:
1.194 misha 897: // ^untaint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
898: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 899:
1.194 misha 900: // ^taint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
901: add_native_method("taint", Method::CT_ANY, _taint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 902:
903: // ^process[code]
1.146 paf 904: add_native_method("process", Method::CT_ANY, _process, 1, 3);
1.1 paf 905:
906: // ^rem{code}
1.185 misha 907: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 908:
909: // ^while(condition){code}
1.185 misha 910: add_native_method("while", Method::CT_ANY, _while, 2, 3, Method::CO_WITHOUT_FRAME);
1.1 paf 911:
912: // ^use[file]
1.10 paf 913: add_native_method("use", Method::CT_ANY, _use, 1, 1);
1.1 paf 914:
1.164 paf 915: // ^break[]
1.185 misha 916: add_native_method("break", Method::CT_ANY, _break, 0, 0, Method::CO_WITHOUT_FRAME);
917:
1.164 paf 918: // ^continue[]
1.185 misha 919: add_native_method("continue", Method::CT_ANY, _continue, 0, 0, Method::CO_WITHOUT_FRAME);
920:
1.54 paf 921: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.185 misha 922: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1, Method::CO_WITHOUT_WCONTEXT);
1.1 paf 923:
924: // ^eval(expr)
925: // ^eval(expr)[format]
1.185 misha 926: add_native_method("eval", Method::CT_ANY, _eval, 1, 2, Method::CO_WITHOUT_FRAME);
1.52 parser 927:
1.1 paf 928: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 929: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
930:
1.63 paf 931:
1.136 paf 932: // ^cache[file_spec](time){code}[{catch code}] time=0 no cache
1.65 paf 933: // ^cache[file_spec] delete cache
1.161 paf 934: // ^cache[] get current expiration time
935: add_native_method("cache", Method::CT_ANY, _cache, 0, 4);
1.63 paf 936:
1.28 parser 937: // switch
938:
939: // ^switch[value]{cases}
1.185 misha 940: add_native_method("switch", Method::CT_ANY, _switch, 2, 2, Method::CO_WITHOUT_FRAME);
1.28 parser 941:
942: // ^case[value]{code}
1.185 misha 943: add_native_method("case", Method::CT_ANY, _case, 2, 10000, Method::CO_WITHOUT_FRAME);
1.74 paf 944:
945: // try-catch
946:
947: // ^try{code}{catch code}
1.185 misha 948: add_native_method("try", Method::CT_ANY, _try_operator, 2, 3, Method::CO_WITHOUT_FRAME);
1.74 paf 949: // ^throw[$exception hash]
950: // ^throw[type;source;comment]
951: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
952:
1.150 paf 953: add_native_method("sleep", Method::CT_ANY, _sleep_operator, 1, 1);
1.10 paf 954: }
1.11 paf 955:
956: // constructor & configurator
1.1 paf 957:
1.129 paf 958: VStateless_class& VClassMAIN_create() {
959: return *new VClassMAIN;
1.1 paf 960: }
E-mail:
![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to op.C CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [parser3project] / parser3 / src / classes