Annotation of parser3/src/classes/op.C, revision 1.193
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:
1.193 ! misha 8: static const char * const IDENT_OP_C="$Date: 2009-07-07 12:16:13 $";
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:
1.164 paf 41: // defines for globals
42:
43: #define CYCLE_DATA_NAME "CYCLE-DATA"
44:
45: // globals
46:
47: //^for & co
48: String cycle_data_name(CYCLE_DATA_NAME);
49:
1.129 paf 50: // defines for statics
51:
52: #define SWITCH_DATA_NAME "SWITCH-DATA"
53: #define CACHE_DATA_NAME "CACHE-DATA"
1.164 paf 54:
1.129 paf 55: #define EXCEPTION_VAR_NAME "exception"
56:
57: // statics
58:
59: //^switch ^case
60: static const String switch_data_name(SWITCH_DATA_NAME);
61: //^cache
62: static const String cache_data_name(CACHE_DATA_NAME);
63:
64: static const String exception_var_name(EXCEPTION_VAR_NAME);
65:
1.164 paf 66:
1.136 paf 67: // local defines
68:
69: #define CACHE_EXCEPTION_HANDLED_CACHE_NAME "cache"
70:
1.129 paf 71: // helpers
72:
1.187 misha 73: class Untaint_lang_name2enum: public HashString<String::Language> {
1.129 paf 74: public:
75: Untaint_lang_name2enum() {
76: #define ULN(name, LANG) \
1.130 paf 77: put(String::Body(name), (value_type)(String::L_##LANG));
1.129 paf 78: ULN("as-is", AS_IS);
79: ULN("optimized-as-is", AS_IS|String::L_OPTIMIZE_BIT);
80: ULN("file-spec", FILE_SPEC);
81: ULN("http-header", HTTP_HEADER);
82: ULN("mail-header", MAIL_HEADER);
83: ULN("uri", URI);
84: ULN("sql", SQL);
85: ULN("js", JS);
86: ULN("xml", XML);
87: ULN("optimized-xml", XML|String::L_OPTIMIZE_BIT);
88: ULN("html", HTML);
89: ULN("optimized-html", HTML|String::L_OPTIMIZE_BIT);
1.159 paf 90: ULN("regex", REGEX);
1.193 ! misha 91: ULN("parser-code", PARSER_CODE);
1.129 paf 92: #undef ULN
93: }
94: } untaint_lang_name2enum;
95:
1.10 paf 96: // methods
97:
1.129 paf 98: static void _if(Request& r, MethodParams& params) {
1.156 paf 99: bool condition=params.as_bool(0, "condition must be expression", r);
1.6 paf 100: if(condition)
1.185 misha 101: r.process_write(*params.get(1));
1.129 paf 102: else if(params.count()>2)
1.185 misha 103: r.process_write(*params.get(2));
1.1 paf 104: }
105:
1.175 misha 106: static String::Language get_untaint_lang(MethodParams& params, int index){
107: const String& lang_name=params.as_string(index, "lang must be string");
108: String::Language lang=untaint_lang_name2enum.get(lang_name);
109: if(!lang)
1.183 misha 110: throw Exception(PARSER_RUNTIME,
1.175 misha 111: &lang_name,
112: "invalid taint language");
113: return lang;
114: }
115:
1.129 paf 116: static void _untaint(Request& r, MethodParams& params) {
117: String::Language lang;
118: if(params.count()==1)
1.175 misha 119: lang=String::L_AS_IS; // mark as simply 'as-is'. useful in html from sql
120: else
121: lang=get_untaint_lang(params, 0);
1.1 paf 122:
123: {
1.129 paf 124: Value& vbody=params.as_junction(params.count()-1, "body must be code");
1.1 paf 125:
1.191 misha 126: Temp_lang temp_lang(r, lang); // set temporarily specified ^untaint[language;
127: StringOrValue result=r.process(vbody); // process marking tainted with that lang
1.188 misha 128: r.write_assign_lang(result);
1.1 paf 129: }
130: }
131:
1.129 paf 132: static void _taint(Request& r, MethodParams& params) {
133: String::Language lang;
134: if(params.count()==1)
1.175 misha 135: lang=String::L_TAINTED; // mark as simply 'tainted'. useful in table:create
136: else
137: lang=get_untaint_lang(params, 0);
1.1 paf 138:
139: {
1.129 paf 140: Value& vbody=params.as_no_junction(params.count()-1, "body must not be code");
1.1 paf 141:
1.191 misha 142: String result(vbody.as_string(), lang); // force result language to specified
1.188 misha 143: r.write_assign_lang(result);
1.1 paf 144: }
145: }
146:
1.129 paf 147: static void _process(Request& r, MethodParams& params) {
148: Method* main_method;
149:
150: size_t index=0;
151: Value* target_self;
152: Value& maybe_target_self=params[index];
153: if(maybe_target_self.get_string() || maybe_target_self.get_junction())
154: target_self=&r.get_method_frame()->caller()->self();
155: else {
156: target_self=&maybe_target_self; index++;
157: }
158:
1.1 paf 159: {
1.129 paf 160: VStateless_class *target_class=target_self->get_last_derived_class();
1.116 paf 161: if(!target_class)
1.166 misha 162: throw Exception(PARSER_RUNTIME,
1.129 paf 163: 0,
1.116 paf 164: "no target class");
1.114 paf 165:
1.73 paf 166: // temporary remove language change
1.192 misha 167: Temp_lang temp_lang(r, String::L_PARSER_CODE);
1.1 paf 168: // temporary zero @main so to maybe-replace it in processed code
1.129 paf 169: Temp_method temp_method_main(*target_class, main_method_name, 0);
1.1 paf 170: // temporary zero @auto so it wouldn't be auto-called in Request::use_buf
1.129 paf 171: Temp_method temp_method_auto(*target_class, auto_method_name, 0);
172:
1.146 paf 173: size_t options_index=index+1;
174: HashStringValue* options=0;
175: if(options_index<params.count()) {
176: Value& voptions=params.as_no_junction(options_index, "options must not be code");
177: options=voptions.get_hash();
178: if(!options)
1.166 misha 179: throw Exception(PARSER_RUNTIME,
1.146 paf 180: 0,
181: "options must be hash");
182: }
183:
1.129 paf 184: const String* main_alias=0;
1.146 paf 185: const String* file_alias=0;
186: int line_no_alias_offset=0;
187: if(options) {
188: int valid_options=0;
189: if(Value* vmain_alias=options->get(PROCESS_MAIN_OPTION_NAME)) {
190: valid_options++;
191: main_alias=&vmain_alias->as_string();
192: }
193: if(Value* vfile_alias=options->get(PROCESS_FILE_OPTION_NAME)) {
194: valid_options++;
195: file_alias=&vfile_alias->as_string();
196: }
197: if(Value* vline_no_alias_offset=options->get(PROCESS_LINENO_OPTION_NAME)) {
198: valid_options++;
199: line_no_alias_offset=vline_no_alias_offset->as_int();
200: }
201:
202: if(valid_options!=options->count())
1.166 misha 203: throw Exception(PARSER_RUNTIME,
1.146 paf 204: 0,
205: "called with invalid option");
206: }
1.129 paf 207:
1.146 paf 208: uint processe_file_no=file_alias?
209: r.register_file(r.absolute(*file_alias))
210: : pseudo_file_no__process;
211: // process...{string}
212: Value& vjunction=params.as_junction(index, "body must be code");
213: // evaluate source to process
214: const String& source=r.process_to_string(vjunction);
215: r.use_buf(*target_class,
1.190 misha 216: source.untaint_cstr(String::L_AS_IS, r.connection(false)),
1.146 paf 217: main_alias,
218: processe_file_no,
219: line_no_alias_offset);
1.1 paf 220:
1.73 paf 221: // main_method
1.129 paf 222: main_method=target_class->get_method(main_method_name);
1.73 paf 223: }
224: // after restoring current-request-lang
225: // maybe-execute @main[]
226: if(main_method) {
1.119 paf 227: // temporarily set method_frame's self to target_self
1.129 paf 228: Temp_method_frame_self tmfs(*r.get_method_frame(), *target_self);
1.73 paf 229: // execute!
230: r.execute(*main_method->parser_code);
1.1 paf 231: }
232: }
233:
1.138 paf 234: static void _rem(Request&, MethodParams& params) {
1.129 paf 235: params.as_junction(0, "body must be code");
1.1 paf 236: }
237:
1.129 paf 238: static void _while(Request& r, MethodParams& params) {
1.164 paf 239: Temp_hash_value<const String::Body, void*>
240: cycle_data_setter(r.classes_conf, cycle_data_name, /*any not null flag*/&r);
241:
1.170 misha 242: Value& vcondition=params.as_expression(0, "condition must be number, bool or expression");
243:
1.162 paf 244: Value& body_code=params.as_junction(1, "body must be code");
245: Value* delim_maybe_code=params.count()>2?¶ms[2]:0;
1.1 paf 246:
247: // while...
248: int endless_loop_count=0;
1.186 misha 249: if(delim_maybe_code){ // delimiter set
1.185 misha 250: bool need_delim=false;
251: while(true) {
252: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
253: throw Exception(PARSER_RUNTIME,
254: 0,
255: "endless loop detected");
256:
257: if(!r.process_to_value(vcondition, false/*don't intercept string*/).as_bool())
258: break;
1.1 paf 259:
1.185 misha 260: StringOrValue sv_processed=r.process(body_code);
261: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 misha 262:
1.185 misha 263: const String* s_processed=sv_processed.get_string();
1.186 misha 264: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 265: if(need_delim) // need delim & iteration produced string?
266: r.write_pass_lang(r.process(*delim_maybe_code));
267: else
268: need_delim=true;
269: }
270: r.write_pass_lang(sv_processed);
1.1 paf 271:
1.185 misha 272: if(lskip==Request::SKIP_BREAK)
273: break;
1.162 paf 274: }
1.185 misha 275: } else {
276: while(true) {
277: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
278: throw Exception(PARSER_RUNTIME,
279: 0,
280: "endless loop detected");
281:
282: if(!r.process_to_value(vcondition, false/*don't intercept string*/).as_bool())
283: break;
1.164 paf 284:
1.185 misha 285: r.process_write(body_code);
286: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
287:
288: if(lskip==Request::SKIP_BREAK)
289: break;
290: }
1.1 paf 291: }
292: }
293:
1.129 paf 294: static void _use(Request& r, MethodParams& params) {
1.171 misha 295: Value& vfile=params.as_no_junction(0, FILE_NAME_MUST_NOT_BE_CODE);
1.113 paf 296: r.use_file(r.main_class, vfile.as_string());
1.1 paf 297: }
298:
1.164 paf 299: static void set_skip(Request& r, Request::Skip askip) {
300: void* data=r.classes_conf.get(cycle_data_name);
301: if(!data)
1.166 misha 302: throw Exception(PARSER_RUNTIME,
1.164 paf 303: 0,
304: "without cycle");
305:
306: r.set_skip(askip);
307: }
308:
309: static void _break(Request& r, MethodParams&) {
310: set_skip(r, Request::SKIP_BREAK);
311: }
312:
313: static void _continue(Request& r, MethodParams&) {
314: set_skip(r, Request::SKIP_CONTINUE);
315: }
316:
1.129 paf 317: static void _for(Request& r, MethodParams& params) {
1.164 paf 318: Temp_hash_value<const String::Body, void*>
319: cycle_data_setter(r.classes_conf, cycle_data_name, /*any not null flag*/&r);
320:
1.129 paf 321: const String& var_name=params.as_string(0, "var name must be string");
322: int from=params.as_int(1, "from must be int", r);
323: int to=params.as_int(2, "to must be int", r);
1.186 misha 324: Value& body_code=params.as_junction(3, "body must be code");
1.129 paf 325: Value* delim_maybe_code=params.count()>4?¶ms[4]:0;
1.1 paf 326:
1.57 paf 327: if(to-from>=MAX_LOOPS) // too long loop?
1.166 misha 328: throw Exception(PARSER_RUNTIME,
1.129 paf 329: 0,
1.57 paf 330: "endless loop detected");
331:
1.129 paf 332: VInt* vint=new VInt(0);
1.154 paf 333:
334: VMethodFrame& caller=*r.get_method_frame()->caller();
335: caller.put_element(caller, var_name, vint, false);
1.186 misha 336: if(delim_maybe_code){ // delimiter set
1.185 misha 337: bool need_delim=false;
338:
339: for(int i=from; i<=to; i++) {
340: vint->set_int(i);
341:
342: StringOrValue sv_processed=r.process(body_code);
343: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 misha 344:
1.185 misha 345: const String* s_processed=sv_processed.get_string();
1.186 misha 346: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 347: if(need_delim) // need delim & iteration produced string?
348: r.write_pass_lang(r.process(*delim_maybe_code));
349: else
350: need_delim=true;
351: }
352: r.write_pass_lang(sv_processed);
1.1 paf 353:
1.185 misha 354: if(lskip==Request::SKIP_BREAK)
355: break;
1.1 paf 356: }
1.185 misha 357: } else {
358: for(int i=from; i<=to; i++) {
359: vint->set_int(i);
360:
361: r.process_write(body_code);
362: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.164 paf 363:
1.185 misha 364: if(lskip==Request::SKIP_BREAK)
365: break;
366: }
1.1 paf 367: }
368: }
369:
1.129 paf 370: static void _eval(Request& r, MethodParams& params) {
371: Value& expr=params.as_junction(0, "need expression");
1.1 paf 372: // evaluate expresion
1.129 paf 373: Value& value_result=r.process_to_value(expr,
1.165 misha 374: false/*don't intercept string*/).as_expr_result();
1.129 paf 375: if(params.count()>1) {
1.177 misha 376: const String& fmt=params.as_string(1, "fmt must be string").trim();
377: if(fmt.is_empty()){
378: r.write_no_lang(value_result);
379: } else {
380: r.write_no_lang(String(format(value_result.as_double(), fmt.cstrm())));
381: }
1.91 paf 382: } else
1.129 paf 383: r.write_no_lang(value_result);
1.1 paf 384: }
385:
1.129 paf 386: static void _connect(Request& r, MethodParams& params) {
1.63 paf 387: #ifdef RESOURCES_DEBUG
388: struct timeval mt[2];
389: #endif
1.129 paf 390: Value& url=params.as_no_junction(0, "url must not be code");
391: Value& body_code=params.as_junction(1, "body must be code");
1.1 paf 392:
1.129 paf 393: Table* protocol2driver_and_client=0;
394: if(Value* sql=r.main_class.get_element(String(MAIN_SQL_NAME), r.main_class, false)) {
395: if(Value* element=sql->get_element(String(MAIN_SQL_DRIVERS_NAME), *sql, false)) {
1.113 paf 396: protocol2driver_and_client=element->get_table();
397: }
398: }
1.11 paf 399:
1.63 paf 400: #ifdef RESOURCES_DEBUG
401: //measure:before
402: gettimeofday(&mt[0],NULL);
403: #endif
1.1 paf 404: // connect
1.142 paf 405: SQL_Connection* connection=SQL_driver_manager->get_connection(url.as_string(),
1.144 paf 406: protocol2driver_and_client,
1.180 misha 407: r.charsets.source().NAME().cstr(),
408: r.request_info.document_root);
1.1 paf 409:
1.63 paf 410: #ifdef RESOURCES_DEBUG
411: //measure:after connect
412: gettimeofday(&mt[1],NULL);
413:
414: double t[2];
415: for(int i=0;i<2;i++)
416: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
417:
418: r.sql_connect_time+=t[1]-t[0];
419: #endif
1.129 paf 420: Temp_connection temp_connection(r, connection);
1.1 paf 421: // execute body
1.53 parser 422: try {
1.189 misha 423: r.process_write(body_code);
1.129 paf 424: connection->commit();
425: connection->close();
1.75 paf 426: } catch(...) { // process problem
1.129 paf 427: connection->rollback();
428: connection->close();
429: rethrow;
1.1 paf 430: }
431: }
432:
1.41 parser 433: #ifndef DOXYGEN
1.129 paf 434: class Switch_data: public PA_Object {
435: public:
436: Request& r;
1.181 misha 437: const String* searching_string;
438: double searching_double;
1.129 paf 439: Value* found;
440: Value* _default;
441: public:
442: Switch_data(Request& ar, Value& asearching):
1.181 misha 443: r(ar)
444: {
445: if(asearching.is_string() || asearching.is_void()){
446: searching_string=&asearching.as_string();
447: searching_double=0;
448: } else {
449: searching_string=0;
450: searching_double=asearching.as_double();
451: }
452: }
1.28 parser 453: };
1.41 parser 454: #endif
1.129 paf 455: static void _switch(Request& r, MethodParams& params) {
456: Switch_data* data=new Switch_data(r, r.process_to_value(params[0]));
1.135 paf 457: Temp_hash_value<const String::Body, void*>
1.129 paf 458: switch_data_setter(r.classes_conf, switch_data_name, data);
1.28 parser 459:
1.129 paf 460: Value& cases_code=params.as_junction(1, "switch cases must be code");
1.82 paf 461: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
462: // because of stacked WWrapper used there as wcontext
1.84 paf 463: r.process(cases_code, true/*intercept_string*/);
1.147 paf 464: if(Value* selected_code=data->found? data->found: data->_default)
1.107 paf 465: r.write_pass_lang(r.process(*selected_code));
1.28 parser 466: }
467:
1.129 paf 468: static void _case(Request& r, MethodParams& params) {
469: Switch_data* data=static_cast<Switch_data*>(r.classes_conf.get(switch_data_name));
1.38 parser 470: if(!data)
1.166 misha 471: throw Exception(PARSER_RUNTIME,
1.129 paf 472: 0,
1.38 parser 473: "without switch");
1.28 parser 474:
1.181 misha 475: if(data->found) // matches already was found
476: return;
477:
1.129 paf 478: int count=params.count();
1.184 misha 479: Value* code=¶ms.as_expression(--count, "case result must be code");
480:
481: #ifdef USE_DESTRUCTORS
482: Junction *j=code->get_junction();
483: if (j){
484: code=new VJunction(j->self,j->method,j->method_frame,j->rcontext,j->wcontext,j->code);
485: if (j->wcontext) j->wcontext->attach_junction((VJunction *)code);
486: }
487: #endif
1.83 paf 488:
1.181 misha 489: for(int i=0; i<count; i++){
1.129 paf 490: Value& value=r.process_to_value(params[i]);
1.28 parser 491:
1.181 misha 492: if(value.is_string() && value.as_string() == CASE_DEFAULT_VALUE){
1.184 misha 493: data->_default=code;
1.181 misha 494: continue;
1.28 parser 495: }
496:
497: bool matches;
1.181 misha 498: if(data->searching_string)
499: matches=(*data->searching_string) == value.as_string();
1.28 parser 500: else
1.181 misha 501: matches=data->searching_double == value.as_double();
1.82 paf 502:
1.181 misha 503: if(matches){
1.184 misha 504: data->found=code;
1.28 parser 505: break;
506: }
507: }
508: }
1.136 paf 509: #ifndef DOXYGEN
510: struct Try_catch_result {
511: StringOrValue processed_code;
512: const String* exception_should_be_handled;
513:
514: Try_catch_result(): exception_should_be_handled(0) {}
515: };
516: #endif
517:
518: /// used by ^try and ^cache, @returns $exception.handled[string] if any
519: template<class I>
520: static Try_catch_result try_catch(Request& r,
521: StringOrValue body_code(Request&, I), I info,
1.179 misha 522: Value* catch_code,
523: bool could_be_handled_by_caller=false)
1.136 paf 524: {
525: Try_catch_result result;
1.179 misha 526:
1.136 paf 527: if(!catch_code) {
528: result.processed_code=body_code(r, info);
529: return result;
530: }
531:
532: // taking snapshot of try-context
533: Request_context_saver try_context(r);
534: try {
535: result.processed_code=body_code(r, info);
536: } catch(const Exception& e) {
537: Request_context_saver throw_context(r); // taking snapshot of throw-context [stack trace contains error]
538: Request::Exception_details details=r.get_details(e);
539: try_context.restore(); // restoring try-context to perform catch-code
540:
541: Junction* junction=catch_code->get_junction();
542: Value* method_frame=junction->method_frame;
543: Value* saved_exception_var_value=method_frame->get_element(exception_var_name, *method_frame, false);
1.154 paf 544: VMethodFrame& frame=*junction->method_frame;
545: frame.put_element(frame, exception_var_name, &details.vhash, false);
1.179 misha 546:
1.136 paf 547: result.processed_code=r.process(*catch_code);
548:
549: // retriving $exception.handled, restoring $exception var
550: Value* vhandled=details.vhash.hash().get(exception_handled_part_name);
1.154 paf 551: frame.put_element(frame, exception_var_name, saved_exception_var_value, false);
1.136 paf 552:
553: bool bhandled=false;
554: if(vhandled) {
555: if(vhandled->is_string()) { // not simple $exception.handled(1/0)?
1.160 paf 556: if(could_be_handled_by_caller) { // and we can possibly handle it
557: result.exception_should_be_handled=vhandled->get_string(); // considering 'recovered' and let the caller recover
558: return result;
559: }
560:
561: bhandled=false;
562: } else
1.179 misha 563: bhandled=vhandled->as_bool();
1.136 paf 564: }
565:
566: if(!bhandled) {
567: throw_context.restore(); // restoring throw-context [exception were not handled]
568: rethrow;
569: }
570: }
1.179 misha 571:
1.136 paf 572: return result;
573: }
1.28 parser 574:
1.63 paf 575: // cache--
576:
577: // consts
578:
1.152 paf 579: const int DATA_STRING_SERIALIZED_VERSION=0x0006;
1.63 paf 580:
581: // helper types
582:
583: #ifndef DOXYGEN
584: struct Data_string_serialized_prolog {
585: int version;
1.79 paf 586: time_t expires;
1.63 paf 587: };
588: #endif
589:
1.68 paf 590: void cache_delete(const String& file_spec) {
1.167 misha 591: file_delete(file_spec, false/*fail_on_problem*/);
1.63 paf 592: }
1.69 paf 593:
594: #ifndef DOXYGEN
1.135 paf 595: struct Cache_scope {
1.129 paf 596: public:
1.79 paf 597: time_t expires;
1.135 paf 598: const String* body_from_disk;
1.79 paf 599: };
1.69 paf 600: struct Locked_process_and_cache_put_action_info {
601: Request *r;
1.136 paf 602: Cache_scope *scope;
1.167 misha 603: Value* body_code;
604: Value* catch_code;
1.136 paf 605: const String* processed_code;
1.69 paf 606: };
607: #endif
1.136 paf 608:
609:
610:
611: static StringOrValue process_cache_body_code(Request& r, Value* body_code) {
1.153 paf 612: return StringOrValue(r.process_to_string(*body_code));
1.136 paf 613: }
614:
1.129 paf 615: /* @todo maybe network order worth spending some effort?
616: don't bothering myself with network byte order,
617: am not planning to be able to move resulting file across platforms
618: */
1.69 paf 619: static void locked_process_and_cache_put_action(int f, void *context) {
620: Locked_process_and_cache_put_action_info& info=
621: *static_cast<Locked_process_and_cache_put_action_info *>(context);
1.129 paf 622:
1.160 paf 623: const String* body_from_disk=info.scope->body_from_disk;
1.69 paf 624: // body->process
1.136 paf 625: Try_catch_result result=try_catch(*info.r,
626: process_cache_body_code, info.body_code,
1.160 paf 627: info.catch_code, body_from_disk!=0 /*we have something old=we can handle=recover later*/);
1.136 paf 628:
629: if(result.exception_should_be_handled) {
630: if(*result.exception_should_be_handled==CACHE_EXCEPTION_HANDLED_CACHE_NAME) {
1.160 paf 631: assert(body_from_disk);
632: info.processed_code=body_from_disk;
1.136 paf 633: } else
1.166 misha 634: throw Exception(PARSER_RUNTIME,
1.136 paf 635: result.exception_should_be_handled,
636: "$"EXCEPTION_VAR_NAME"."EXCEPTION_HANDLED_PART_NAME" value must be "
637: "either boolean or string '"CACHE_EXCEPTION_HANDLED_CACHE_NAME"'");
638: } else
639: info.processed_code=&result.processed_code.as_string();
1.69 paf 640:
1.79 paf 641: // expiration time not spoiled by ^cache(0) or something?
1.136 paf 642: if(info.scope->expires > time(0)) {
1.79 paf 643: // string -serialize> buffer
1.136 paf 644: String::Cm serialized=info.processed_code->serialize(
1.129 paf 645: sizeof(Data_string_serialized_prolog));
1.79 paf 646: Data_string_serialized_prolog& prolog=
1.129 paf 647: *reinterpret_cast<Data_string_serialized_prolog *>(serialized.str);
1.79 paf 648: prolog.version=DATA_STRING_SERIALIZED_VERSION;
1.136 paf 649: prolog.expires=info.scope->expires;
1.79 paf 650:
651: // buffer -write> file
1.129 paf 652: write(f, serialized.str, serialized.length);
1.79 paf 653: } else // expired!
1.136 paf 654: info.scope->expires=0; // flag it so that could be easily checked by caller
1.69 paf 655: }
1.129 paf 656: const String* locked_process_and_cache_put(Request& r,
1.128 paf 657: Value& body_code,
1.136 paf 658: Value* catch_code,
659: Cache_scope& scope,
660: const String& file_spec)
661: {
1.140 paf 662: Locked_process_and_cache_put_action_info info={&r, &scope, &body_code, catch_code, 0};
1.69 paf 663:
1.129 paf 664: const String* result=file_write_action_under_lock(
1.69 paf 665: file_spec,
1.168 misha 666: "cache_put",
667: locked_process_and_cache_put_action,
668: &info,
1.69 paf 669: false/*as_text*/,
670: false/*do_append*/,
1.173 misha 671: false/*block == don't wait till other thread release lock*/,
672: false/*dun throw exception if lock failed*/) ? info.processed_code: 0;
1.168 misha 673:
1.100 paf 674: time_t now=time(0);
1.136 paf 675: if(scope.expires<=now)
1.79 paf 676: cache_delete(file_spec);
677: return result;
1.63 paf 678: }
1.137 paf 679: #ifndef DOXYGEN
1.135 paf 680: struct Cache_get_result {
681: const String* body;
682: bool expired;
1.137 paf 683: };
684: #endif
685: static Cache_get_result cache_get(Request_charsets& charsets, const String& file_spec, time_t now) {
1.140 paf 686: Cache_get_result result={0, false};
1.135 paf 687:
1.129 paf 688: File_read_result file=file_read(charsets, file_spec,
1.63 paf 689: false/*as_text*/,
1.129 paf 690: 0, //no params
691: false/*fail_on_read_problem*/);
692: if(file.success && file.length/* ignore reads which are empty due to
1.72 paf 693: non-unary open+lockEX conflict with lockSH */) {
1.129 paf 694:
1.72 paf 695: Data_string_serialized_prolog& prolog=
1.129 paf 696: *reinterpret_cast<Data_string_serialized_prolog *>(file.str);
1.63 paf 697:
1.135 paf 698: String* body=new String;
1.72 paf 699: if(
1.129 paf 700: file.length>=sizeof(Data_string_serialized_prolog)
1.135 paf 701: && prolog.version==DATA_STRING_SERIALIZED_VERSION) {
702: if(body->deserialize(sizeof(Data_string_serialized_prolog), file.str, file.length)) {
703: result.body=body;
704: result.expired=prolog.expires <= now;
705: }
706: }
1.72 paf 707: }
1.63 paf 708:
1.135 paf 709: return result;
1.63 paf 710: }
1.129 paf 711: static time_t as_expires(Request& r, MethodParams& params,
1.79 paf 712: int index, time_t now) {
713: time_t result;
1.129 paf 714: if(Value* vdate=params[index].as(VDATE_TYPE, false))
715: result=static_cast<VDate*>(vdate)->get_time();
1.79 paf 716: else
1.129 paf 717: result=now+(time_t)params.as_double(index, "lifespan must be date or number", r);
1.79 paf 718:
719: return result;
720: }
1.129 paf 721: static const String& as_file_spec(Request& r, MethodParams& params, int index) {
722: return r.absolute(params.as_string(index, "filespec must be string"));
1.79 paf 723: }
1.129 paf 724: static void _cache(Request& r, MethodParams& params) {
1.173 misha 725: if(params.count()==0) {
726: // ^cache[] -- return current expiration time
1.158 paf 727: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
728: if(!scope)
1.166 misha 729: throw Exception(PARSER_RUNTIME,
1.158 paf 730: 0,
731: "expire-time get without cache");
732: r.write_no_lang(*new VDate(scope->expires));
733: return;
734: }
735:
1.79 paf 736: time_t now=time(0);
737:
1.129 paf 738: if(params.count()==1) {
1.173 misha 739: // ^cache[filename] ^cache(seconds) ^cache[expires date]
1.129 paf 740: if(params[0].is_string()) { // filename?
1.79 paf 741: cache_delete(as_file_spec(r, params, 0));
742: return;
743: }
744:
745: // secods|expires date
1.135 paf 746: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
747: if(!scope)
1.166 misha 748: throw Exception(PARSER_RUNTIME,
1.129 paf 749: 0,
1.79 paf 750: "expire-time reducing instruction without cache");
751:
1.129 paf 752: time_t expires=as_expires(r, params, 0, now);
1.135 paf 753: if(expires < scope->expires)
754: scope->expires=expires;
1.79 paf 755:
756: return;
1.149 paf 757: } else if(params.count()<3)
1.166 misha 758: throw Exception(PARSER_RUNTIME,
1.149 paf 759: 0,
760: "invalid number of parameters");
1.63 paf 761:
762: // file_spec, expires, body code
1.172 misha 763: const String& file_spec=as_file_spec(r, params, 0);
1.65 paf 764:
1.141 paf 765: Cache_scope scope={as_expires(r, params, 1, now), 0};
1.135 paf 766:
767: Temp_hash_value<const String::Body, void*>
768: cache_scope_setter(r.classes_conf, cache_data_name, &scope);
1.136 paf 769: Value& body_code=params.as_junction(2, "body_code must be code");
770: Value* catch_code=0;
771: if(params.count()>3)
772: catch_code=¶ms.as_junction(3, "catch_code must be code");
1.63 paf 773:
1.168 misha 774: if(scope.expires>now) {
775: Cache_get_result cached=cache_get(r.charsets, file_spec, now);
1.69 paf 776:
1.168 misha 777: if(cached.body) { // have cached copy
1.174 misha 778: if(cached.expired) {
779: scope.body_from_disk=cached.body; // storing for user to retrive it with ^cache[]
780: } else {
781: // and it's not expired yet write it out
1.168 misha 782: r.write_assign_lang(*cached.body);
783: // happy with it
784: return;
785: }
786: }
787:
788: // no cached info or it's already expired
1.173 misha 789:
790: // trying to process it under lock and store result in file
1.174 misha 791: const String* processed_body=locked_process_and_cache_put(r, body_code, catch_code, scope, file_spec);
1.173 misha 792: if(processed_body){
1.174 misha 793: // write it out
794: r.write_assign_lang(*processed_body);
795: // happy with it
796: return;
1.173 misha 797: } else {
798: // we fail while get exclusive lock. nvm, we just execute body_code a bit later
1.174 misha 799: }
1.69 paf 800: } else {
1.79 paf 801: // instructed not to cache; forget cached copy
1.68 paf 802: cache_delete(file_spec);
1.69 paf 803: }
1.168 misha 804:
805: // process without cacheing
806: const String& processed_body=r.process_to_string(body_code);
807: // write it out
808: r.write_assign_lang(processed_body);
1.63 paf 809: }
810:
1.136 paf 811: static StringOrValue process_try_body_code(Request& r, Value* body_code) {
812: return r.process(*body_code);
813: }
1.129 paf 814: static void _try_operator(Request& r, MethodParams& params) {
815: Value& body_code=params.as_junction(0, "body_code must be code");
816: Value& catch_code=params.as_junction(1, "catch_code must be code");
1.179 misha 817: Value* finally_code=(params.count()==3) ? ¶ms.as_junction(2, "finally_code must be code") : 0;
818:
819: Try_catch_result result;
820: StringOrValue finally_result;
821: try{
822: result=try_catch(r,
823: process_try_body_code, &body_code,
824: &catch_code);
825: if(result.exception_should_be_handled)
826: throw Exception(PARSER_RUNTIME,
827: result.exception_should_be_handled,
828: "catch block must set $exception.handled to some boolean value, not string");
829: } catch(...){
830: if(finally_code)
831: finally_result=r.process(*finally_code);
832: rethrow;
833: }
1.74 paf 834:
1.179 misha 835: if(finally_code)
836: finally_result=r.process(*finally_code);
1.123 paf 837:
1.136 paf 838: // write out processed body_code or catch_code
839: r.write_pass_lang(result.processed_code);
1.179 misha 840:
841: // write out processed finally code
842: if(finally_code)
843: r.write_pass_lang(finally_result);
1.74 paf 844: }
845:
1.138 paf 846: static void _throw_operator(Request&, MethodParams& params) {
1.178 misha 847: if(params.count()==1 && !params[0].is_string()) {
1.129 paf 848: if(HashStringValue *hash=params[0].get_hash()) {
849: const char* type=0;
850: if(Value* value=hash->get(exception_type_part_name))
1.78 paf 851: type=value->as_string().cstr();
1.129 paf 852: const String* source=0;
853: if(Value* value=hash->get(exception_source_part_name))
1.74 paf 854: source=&value->as_string();
1.138 paf 855: const char* comment=0;
1.129 paf 856: if(Value* value=hash->get(exception_comment_part_name))
1.74 paf 857: comment=value->as_string().cstr();
858:
1.78 paf 859: throw Exception(type,
1.129 paf 860: source?source:0,
861: "%s", comment?comment:"");
1.74 paf 862: } else
1.166 misha 863: throw Exception(PARSER_RUNTIME,
1.129 paf 864: 0,
1.178 misha 865: "one-param version has hash or string param");
1.74 paf 866: } else {
1.129 paf 867: const char* type=params.as_string(0, "type must be string").cstr();
1.178 misha 868: const String* source=params.count()>1? ¶ms.as_string(1, "source must be string"):0;
869: const char* comment=params.count()>2? params.as_string(2, "comment must be string").cstr():0;
870: throw Exception(type, source, "%s", comment?comment:"");
1.74 paf 871: }
1.132 paf 872: }
1.129 paf 873:
1.150 paf 874: static void _sleep_operator(Request& r, MethodParams& params) {
875: double seconds=params.as_double(0, "seconds must be double", r);
1.151 paf 876: pa_sleep((int)trunc(seconds), (int)trunc(seconds*1000));
1.150 paf 877: }
878:
1.129 paf 879: #if defined(WIN32) && defined(_DEBUG)
880: # define PA_BPT
1.138 paf 881: static void _bpt(Request&, MethodParams&) {
1.129 paf 882: _asm int 3;
883: }
884: #endif
885:
1.10 paf 886: // constructor
887:
1.129 paf 888: VClassMAIN::VClassMAIN(): VClass() {
889: set_name(*new String(MAIN_CLASS_NAME));
890:
891: #ifdef PA_BPT
892: // ^bpt[]
893: add_native_method("bpt", Method::CT_ANY, _bpt, 0, 0);
894: #endif
1.121 paf 895:
1.1 paf 896: // ^if(condition){code-when-true}
897: // ^if(condition){code-when-true}{code-when-false}
1.185 misha 898: add_native_method("if", Method::CT_ANY, _if, 2, 3, Method::CO_WITHOUT_FRAME);
1.1 paf 899:
1.185 misha 900: // ^untaint[as-is|uri|sql|js|html|html-typo|regex]{code}
1.188 misha 901: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2);
1.1 paf 902:
1.185 misha 903: // ^taint[as-is|uri|sql|js|html|html-typo|regex]{code}
1.188 misha 904: add_native_method("taint", Method::CT_ANY, _taint, 1, 2);
1.1 paf 905:
906: // ^process[code]
1.146 paf 907: add_native_method("process", Method::CT_ANY, _process, 1, 3);
1.1 paf 908:
909: // ^rem{code}
1.185 misha 910: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 911:
912: // ^while(condition){code}
1.185 misha 913: add_native_method("while", Method::CT_ANY, _while, 2, 3, Method::CO_WITHOUT_FRAME);
1.1 paf 914:
915: // ^use[file]
1.10 paf 916: add_native_method("use", Method::CT_ANY, _use, 1, 1);
1.1 paf 917:
1.164 paf 918: // ^break[]
1.185 misha 919: add_native_method("break", Method::CT_ANY, _break, 0, 0, Method::CO_WITHOUT_FRAME);
920:
1.164 paf 921: // ^continue[]
1.185 misha 922: add_native_method("continue", Method::CT_ANY, _continue, 0, 0, Method::CO_WITHOUT_FRAME);
923:
1.54 paf 924: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.185 misha 925: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1, Method::CO_WITHOUT_WCONTEXT);
1.1 paf 926:
927: // ^eval(expr)
928: // ^eval(expr)[format]
1.185 misha 929: add_native_method("eval", Method::CT_ANY, _eval, 1, 2, Method::CO_WITHOUT_FRAME);
1.52 parser 930:
1.1 paf 931: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 932: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
933:
1.63 paf 934:
1.136 paf 935: // ^cache[file_spec](time){code}[{catch code}] time=0 no cache
1.65 paf 936: // ^cache[file_spec] delete cache
1.161 paf 937: // ^cache[] get current expiration time
938: add_native_method("cache", Method::CT_ANY, _cache, 0, 4);
1.63 paf 939:
1.28 parser 940: // switch
941:
942: // ^switch[value]{cases}
1.185 misha 943: add_native_method("switch", Method::CT_ANY, _switch, 2, 2, Method::CO_WITHOUT_FRAME);
1.28 parser 944:
945: // ^case[value]{code}
1.185 misha 946: add_native_method("case", Method::CT_ANY, _case, 2, 10000, Method::CO_WITHOUT_FRAME);
1.74 paf 947:
948: // try-catch
949:
950: // ^try{code}{catch code}
1.185 misha 951: add_native_method("try", Method::CT_ANY, _try_operator, 2, 3, Method::CO_WITHOUT_FRAME);
1.74 paf 952: // ^throw[$exception hash]
953: // ^throw[type;source;comment]
954: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
955:
1.150 paf 956: add_native_method("sleep", Method::CT_ANY, _sleep_operator, 1, 1);
1.10 paf 957: }
1.11 paf 958:
959: // constructor & configurator
1.1 paf 960:
1.129 paf 961: VStateless_class& VClassMAIN_create() {
962: return *new VClassMAIN;
1.1 paf 963: }
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