Annotation of parser3/src/classes/op.C, revision 1.172
1.1 paf 1: /** @file
1.9 paf 2: Parser: parser @b operators.
1.1 paf 3:
1.155 paf 4: Copyright (c) 2001-2005 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:
1.172 ! misha 8: static const char * const IDENT_OP_C="$Date: 2007/08/20 10:02:51 $";
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:
1.130 paf 73: class Untaint_lang_name2enum: public Hash<const String::Body, 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);
1.129 paf 91: #undef ULN
92: }
93: } untaint_lang_name2enum;
94:
1.10 paf 95: // methods
96:
1.129 paf 97: static void _if(Request& r, MethodParams& params) {
1.156 paf 98: bool condition=params.as_bool(0, "condition must be expression", r);
1.6 paf 99: if(condition)
1.156 paf 100: r.write_pass_lang(r.process(*params.get(1)));
1.129 paf 101: else if(params.count()>2)
1.156 paf 102: r.write_pass_lang(r.process(*params.get(2)));
1.1 paf 103: }
104:
1.129 paf 105: static void _untaint(Request& r, MethodParams& params) {
1.1 paf 106:
1.129 paf 107: String::Language lang;
108: if(params.count()==1)
109: lang=String::L_AS_IS; // mark as simply 'tainted'. useful in html from sql
1.59 paf 110: else {
1.129 paf 111: const String& lang_name=params.as_string(0, "lang must be string");
112: lang=untaint_lang_name2enum.get(lang_name);
1.59 paf 113: if(!lang)
1.78 paf 114: throw Exception(0,
1.59 paf 115: &lang_name,
116: "invalid taint language");
117: }
1.1 paf 118:
119: {
1.129 paf 120: Value& vbody=params.as_junction(params.count()-1, "body must be code");
1.1 paf 121:
122: Temp_lang temp_lang(r, lang); // set temporarily specified ^untaint[language;
1.86 paf 123: r.write_pass_lang(r.process(vbody)); // process marking tainted with that lang
1.1 paf 124: }
125: }
126:
1.129 paf 127: static void _taint(Request& r, MethodParams& params) {
128: String::Language lang;
129: if(params.count()==1)
130: lang=String::L_TAINTED; // mark as simply 'tainted'. useful in table:set
1.1 paf 131: else {
1.129 paf 132: const String& lang_name=params.as_string(0, "lang must be string");
133: lang=untaint_lang_name2enum.get(lang_name);
1.1 paf 134: if(!lang)
1.78 paf 135: throw Exception(0,
1.3 paf 136: &lang_name,
137: "invalid taint language");
1.1 paf 138: }
139:
140: {
1.129 paf 141: Value& vbody=params.as_no_junction(params.count()-1, "body must not be code");
1.1 paf 142:
1.129 paf 143: String result;
1.1 paf 144: result.append(
145: vbody.as_string(), // process marking tainted with that lang
146: lang, true); // force result language to specified
147: r.write_pass_lang(result);
148: }
149: }
150:
1.129 paf 151: static void _process(Request& r, MethodParams& params) {
152: Method* main_method;
153:
154: size_t index=0;
155: Value* target_self;
156: Value& maybe_target_self=params[index];
157: if(maybe_target_self.get_string() || maybe_target_self.get_junction())
158: target_self=&r.get_method_frame()->caller()->self();
159: else {
160: target_self=&maybe_target_self; index++;
161: }
162:
1.1 paf 163: {
1.129 paf 164: VStateless_class *target_class=target_self->get_last_derived_class();
1.116 paf 165: if(!target_class)
1.166 misha 166: throw Exception(PARSER_RUNTIME,
1.129 paf 167: 0,
1.116 paf 168: "no target class");
1.114 paf 169:
1.73 paf 170: // temporary remove language change
1.129 paf 171: Temp_lang temp_lang(r, String::L_PASS_APPENDED);
1.1 paf 172: // temporary zero @main so to maybe-replace it in processed code
1.129 paf 173: Temp_method temp_method_main(*target_class, main_method_name, 0);
1.1 paf 174: // temporary zero @auto so it wouldn't be auto-called in Request::use_buf
1.129 paf 175: Temp_method temp_method_auto(*target_class, auto_method_name, 0);
176:
1.146 paf 177: size_t options_index=index+1;
178: HashStringValue* options=0;
179: if(options_index<params.count()) {
180: Value& voptions=params.as_no_junction(options_index, "options must not be code");
181: options=voptions.get_hash();
182: if(!options)
1.166 misha 183: throw Exception(PARSER_RUNTIME,
1.146 paf 184: 0,
185: "options must be hash");
186: }
187:
1.129 paf 188: const String* main_alias=0;
1.146 paf 189: const String* file_alias=0;
190: int line_no_alias_offset=0;
191: if(options) {
192: int valid_options=0;
193: if(Value* vmain_alias=options->get(PROCESS_MAIN_OPTION_NAME)) {
194: valid_options++;
195: main_alias=&vmain_alias->as_string();
196: }
197: if(Value* vfile_alias=options->get(PROCESS_FILE_OPTION_NAME)) {
198: valid_options++;
199: file_alias=&vfile_alias->as_string();
200: }
201: if(Value* vline_no_alias_offset=options->get(PROCESS_LINENO_OPTION_NAME)) {
202: valid_options++;
203: line_no_alias_offset=vline_no_alias_offset->as_int();
204: }
205:
206: if(valid_options!=options->count())
1.166 misha 207: throw Exception(PARSER_RUNTIME,
1.146 paf 208: 0,
209: "called with invalid option");
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,
220: source.cstr(String::L_UNSPECIFIED, r.connection(false)),
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) {
1.119 paf 231: // temporarily set method_frame's self to target_self
1.129 paf 232: Temp_method_frame_self tmfs(*r.get_method_frame(), *target_self);
1.73 paf 233: // execute!
234: r.execute(*main_method->parser_code);
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) {
1.164 paf 243: Temp_hash_value<const String::Body, void*>
244: cycle_data_setter(r.classes_conf, cycle_data_name, /*any not null flag*/&r);
245:
1.170 misha 246: Value& vcondition=params.as_expression(0, "condition must be number, bool or expression");
247:
1.162 paf 248: Value& body_code=params.as_junction(1, "body must be code");
249: Value* delim_maybe_code=params.count()>2?¶ms[2]:0;
1.1 paf 250:
251: // while...
252: int endless_loop_count=0;
1.162 paf 253: bool need_delim=false;
1.1 paf 254: while(true) {
1.18 parser 255: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
1.166 misha 256: throw Exception(PARSER_RUNTIME,
1.129 paf 257: 0,
1.1 paf 258: "endless loop detected");
259:
1.86 paf 260: bool condition=r.process_to_value(vcondition,
1.1 paf 261: false/*don't intercept string*/).as_bool();
262: if(!condition) // ...condition is true
263: break;
264:
1.162 paf 265: StringOrValue sv_processed=r.process(body_code);
1.164 paf 266: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.162 paf 267: const String* s_processed=sv_processed.get_string();
268: if(delim_maybe_code && s_processed && s_processed->length()) { // delimiter set and we have body
269: if(need_delim) // need delim & iteration produced string?
270: r.write_pass_lang(r.process(*delim_maybe_code));
271: need_delim=true;
272: }
273: r.write_pass_lang(sv_processed);
1.164 paf 274:
275: if(lskip==Request::SKIP_BREAK)
276: break;
1.1 paf 277: }
278: }
279:
1.129 paf 280: static void _use(Request& r, MethodParams& params) {
1.171 misha 281: Value& vfile=params.as_no_junction(0, FILE_NAME_MUST_NOT_BE_CODE);
1.113 paf 282: r.use_file(r.main_class, vfile.as_string());
1.1 paf 283: }
284:
1.164 paf 285: static void set_skip(Request& r, Request::Skip askip) {
286: void* data=r.classes_conf.get(cycle_data_name);
287: if(!data)
1.166 misha 288: throw Exception(PARSER_RUNTIME,
1.164 paf 289: 0,
290: "without cycle");
291:
292: r.set_skip(askip);
293: }
294:
295: static void _break(Request& r, MethodParams&) {
296: set_skip(r, Request::SKIP_BREAK);
297: }
298:
299: static void _continue(Request& r, MethodParams&) {
300: set_skip(r, Request::SKIP_CONTINUE);
301: }
302:
1.129 paf 303: static void _for(Request& r, MethodParams& params) {
1.164 paf 304: Temp_hash_value<const String::Body, void*>
305: cycle_data_setter(r.classes_conf, cycle_data_name, /*any not null flag*/&r);
306:
1.129 paf 307: const String& var_name=params.as_string(0, "var name must be string");
308: int from=params.as_int(1, "from must be int", r);
309: int to=params.as_int(2, "to must be int", r);
310: Value& body_code=params.as_junction(3, "body must be code");
311: Value* delim_maybe_code=params.count()>4?¶ms[4]:0;
1.1 paf 312:
1.57 paf 313: if(to-from>=MAX_LOOPS) // too long loop?
1.166 misha 314: throw Exception(PARSER_RUNTIME,
1.129 paf 315: 0,
1.57 paf 316: "endless loop detected");
317:
1.1 paf 318: bool need_delim=false;
1.129 paf 319: VInt* vint=new VInt(0);
1.154 paf 320:
321: VMethodFrame& caller=*r.get_method_frame()->caller();
322: caller.put_element(caller, var_name, vint, false);
1.1 paf 323: for(int i=from; i<=to; i++) {
324: vint->set_int(i);
325:
1.108 paf 326: StringOrValue sv_processed=r.process(body_code);
1.164 paf 327: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.129 paf 328: const String* s_processed=sv_processed.get_string();
329: if(delim_maybe_code && s_processed && s_processed->length()) { // delimiter set and we have body
1.108 paf 330: if(need_delim) // need delim & iteration produced string?
1.86 paf 331: r.write_pass_lang(r.process(*delim_maybe_code));
1.1 paf 332: need_delim=true;
333: }
1.108 paf 334: r.write_pass_lang(sv_processed);
1.164 paf 335:
336: if(lskip==Request::SKIP_BREAK)
337: break;
1.1 paf 338: }
339: }
340:
1.129 paf 341: static void _eval(Request& r, MethodParams& params) {
342: Value& expr=params.as_junction(0, "need expression");
1.1 paf 343: // evaluate expresion
1.129 paf 344: Value& value_result=r.process_to_value(expr,
1.165 misha 345: false/*don't intercept string*/).as_expr_result();
1.129 paf 346: if(params.count()>1) {
347: Value& fmt=params.as_no_junction(1, "fmt must not be code");
348: r.write_no_lang(String(format(value_result.as_double(), fmt.as_string().cstrm())));
1.91 paf 349: } else
1.129 paf 350: r.write_no_lang(value_result);
1.1 paf 351: }
352:
1.129 paf 353: static void _connect(Request& r, MethodParams& params) {
1.63 paf 354: #ifdef RESOURCES_DEBUG
355: struct timeval mt[2];
356: #endif
1.129 paf 357: Value& url=params.as_no_junction(0, "url must not be code");
358: Value& body_code=params.as_junction(1, "body must be code");
1.1 paf 359:
1.129 paf 360: Table* protocol2driver_and_client=0;
361: if(Value* sql=r.main_class.get_element(String(MAIN_SQL_NAME), r.main_class, false)) {
362: if(Value* element=sql->get_element(String(MAIN_SQL_DRIVERS_NAME), *sql, false)) {
1.113 paf 363: protocol2driver_and_client=element->get_table();
364: }
365: }
1.11 paf 366:
1.63 paf 367: #ifdef RESOURCES_DEBUG
368: //measure:before
369: gettimeofday(&mt[0],NULL);
370: #endif
1.1 paf 371: // connect
1.142 paf 372: SQL_Connection* connection=SQL_driver_manager->get_connection(url.as_string(),
1.144 paf 373: protocol2driver_and_client,
374: r.charsets.source().NAME().cstr());
1.1 paf 375:
1.63 paf 376: #ifdef RESOURCES_DEBUG
377: //measure:after connect
378: gettimeofday(&mt[1],NULL);
379:
380: double t[2];
381: for(int i=0;i<2;i++)
382: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
383:
384: r.sql_connect_time+=t[1]-t[0];
385: #endif
1.129 paf 386: Temp_connection temp_connection(r, connection);
1.1 paf 387: // execute body
1.53 parser 388: try {
1.86 paf 389: r.write_assign_lang(r.process(body_code));
1.129 paf 390: connection->commit();
391: connection->close();
1.75 paf 392: } catch(...) { // process problem
1.129 paf 393: connection->rollback();
394: connection->close();
395: rethrow;
1.1 paf 396: }
397: }
398:
1.41 parser 399: #ifndef DOXYGEN
1.129 paf 400: class Switch_data: public PA_Object {
401: public:
402: Request& r;
403: Value& searching;
404: Value* found;
405: Value* _default;
406: public:
407: Switch_data(Request& ar, Value& asearching):
408: r(ar), searching(asearching) {}
1.28 parser 409: };
1.41 parser 410: #endif
1.129 paf 411: static void _switch(Request& r, MethodParams& params) {
412: Switch_data* data=new Switch_data(r, r.process_to_value(params[0]));
1.135 paf 413: Temp_hash_value<const String::Body, void*>
1.129 paf 414: switch_data_setter(r.classes_conf, switch_data_name, data);
1.28 parser 415:
1.129 paf 416: Value& cases_code=params.as_junction(1, "switch cases must be code");
1.82 paf 417: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
418: // because of stacked WWrapper used there as wcontext
1.84 paf 419: r.process(cases_code, true/*intercept_string*/);
1.147 paf 420: if(Value* selected_code=data->found? data->found: data->_default)
1.107 paf 421: r.write_pass_lang(r.process(*selected_code));
1.28 parser 422: }
423:
1.129 paf 424: static void _case(Request& r, MethodParams& params) {
425: Switch_data* data=static_cast<Switch_data*>(r.classes_conf.get(switch_data_name));
1.38 parser 426: if(!data)
1.166 misha 427: throw Exception(PARSER_RUNTIME,
1.129 paf 428: 0,
1.38 parser 429: "without switch");
1.28 parser 430:
1.129 paf 431: int count=params.count();
432: Value& code=params.as_junction(--count, "case result must be code");
1.83 paf 433:
1.163 paf 434: Value& searching=data->searching;
435: bool we_are_searching_string_or_void=searching.is_string() || searching.is_void();
1.28 parser 436: for(int i=0; i<count; i++) {
1.129 paf 437: Value& value=r.process_to_value(params[i]);
1.28 parser 438:
1.157 paf 439: if(value.is_string() && value.as_string() == CASE_DEFAULT_VALUE) {
1.129 paf 440: data->_default=&code;
1.28 parser 441: break;
442: }
443:
444: bool matches;
1.163 paf 445: if(we_are_searching_string_or_void)
446: matches=searching.as_string() == value.as_string();
1.28 parser 447: else
1.163 paf 448: matches=searching.as_double() == value.as_double();
1.28 parser 449:
450: if(matches) {
1.82 paf 451: if(data->found)
1.166 misha 452: throw Exception(PARSER_RUNTIME,
1.129 paf 453: 0,
1.82 paf 454: "duplicate found");
455:
1.129 paf 456: data->found=&code;
1.28 parser 457: break;
458: }
459: }
460: }
1.136 paf 461: #ifndef DOXYGEN
462: struct Try_catch_result {
463: StringOrValue processed_code;
464: const String* exception_should_be_handled;
465:
466: Try_catch_result(): exception_should_be_handled(0) {}
467: };
468: #endif
469:
470: /// used by ^try and ^cache, @returns $exception.handled[string] if any
471: template<class I>
472: static Try_catch_result try_catch(Request& r,
473: StringOrValue body_code(Request&, I), I info,
1.160 paf 474: Value* catch_code, bool could_be_handled_by_caller=false)
1.136 paf 475: {
476: Try_catch_result result;
477: if(!catch_code) {
478: result.processed_code=body_code(r, info);
479: return result;
480: }
481:
482: // taking snapshot of try-context
483: Request_context_saver try_context(r);
484: try {
485: result.processed_code=body_code(r, info);
486: } catch(const Exception& e) {
487: Request_context_saver throw_context(r); // taking snapshot of throw-context [stack trace contains error]
488: Request::Exception_details details=r.get_details(e);
489: try_context.restore(); // restoring try-context to perform catch-code
490:
491: Junction* junction=catch_code->get_junction();
492: Value* method_frame=junction->method_frame;
493: Value* saved_exception_var_value=method_frame->get_element(exception_var_name, *method_frame, false);
1.154 paf 494: VMethodFrame& frame=*junction->method_frame;
495: frame.put_element(frame, exception_var_name, &details.vhash, false);
1.136 paf 496: result.processed_code=r.process(*catch_code);
497:
498: // retriving $exception.handled, restoring $exception var
499: Value* vhandled=details.vhash.hash().get(exception_handled_part_name);
1.154 paf 500: frame.put_element(frame, exception_var_name, saved_exception_var_value, false);
1.136 paf 501:
502: bool bhandled=false;
503: if(vhandled) {
504: if(vhandled->is_string()) { // not simple $exception.handled(1/0)?
1.160 paf 505: if(could_be_handled_by_caller) { // and we can possibly handle it
506: result.exception_should_be_handled=vhandled->get_string(); // considering 'recovered' and let the caller recover
507: return result;
508: }
509:
510: bhandled=false;
511: } else
512: bhandled=vhandled->as_bool();
1.136 paf 513: }
514:
515: if(!bhandled) {
516: throw_context.restore(); // restoring throw-context [exception were not handled]
517: rethrow;
518: }
519: }
520: return result;
521: }
1.28 parser 522:
1.63 paf 523: // cache--
524:
525: // consts
526:
1.152 paf 527: const int DATA_STRING_SERIALIZED_VERSION=0x0006;
1.63 paf 528:
529: // helper types
530:
531: #ifndef DOXYGEN
532: struct Data_string_serialized_prolog {
533: int version;
1.79 paf 534: time_t expires;
1.63 paf 535: };
536: #endif
537:
1.68 paf 538: void cache_delete(const String& file_spec) {
1.167 misha 539: file_delete(file_spec, false/*fail_on_problem*/);
1.63 paf 540: }
1.69 paf 541:
542: #ifndef DOXYGEN
1.135 paf 543: struct Cache_scope {
1.129 paf 544: public:
1.79 paf 545: time_t expires;
1.135 paf 546: const String* body_from_disk;
1.79 paf 547: };
1.69 paf 548: struct Locked_process_and_cache_put_action_info {
549: Request *r;
1.136 paf 550: Cache_scope *scope;
1.167 misha 551: Value* body_code;
552: Value* catch_code;
1.136 paf 553: const String* processed_code;
1.69 paf 554: };
555: #endif
1.136 paf 556:
557:
558:
559: static StringOrValue process_cache_body_code(Request& r, Value* body_code) {
1.153 paf 560: return StringOrValue(r.process_to_string(*body_code));
1.136 paf 561: }
562:
1.129 paf 563: /* @todo maybe network order worth spending some effort?
564: don't bothering myself with network byte order,
565: am not planning to be able to move resulting file across platforms
566: */
1.69 paf 567: static void locked_process_and_cache_put_action(int f, void *context) {
568: Locked_process_and_cache_put_action_info& info=
569: *static_cast<Locked_process_and_cache_put_action_info *>(context);
1.129 paf 570:
1.160 paf 571: const String* body_from_disk=info.scope->body_from_disk;
1.69 paf 572: // body->process
1.136 paf 573: Try_catch_result result=try_catch(*info.r,
574: process_cache_body_code, info.body_code,
1.160 paf 575: info.catch_code, body_from_disk!=0 /*we have something old=we can handle=recover later*/);
1.136 paf 576:
577: if(result.exception_should_be_handled) {
578: if(*result.exception_should_be_handled==CACHE_EXCEPTION_HANDLED_CACHE_NAME) {
1.160 paf 579: assert(body_from_disk);
580: info.processed_code=body_from_disk;
1.136 paf 581: } else
1.166 misha 582: throw Exception(PARSER_RUNTIME,
1.136 paf 583: result.exception_should_be_handled,
584: "$"EXCEPTION_VAR_NAME"."EXCEPTION_HANDLED_PART_NAME" value must be "
585: "either boolean or string '"CACHE_EXCEPTION_HANDLED_CACHE_NAME"'");
586: } else
587: info.processed_code=&result.processed_code.as_string();
1.69 paf 588:
1.79 paf 589: // expiration time not spoiled by ^cache(0) or something?
1.136 paf 590: if(info.scope->expires > time(0)) {
1.79 paf 591: // string -serialize> buffer
1.136 paf 592: String::Cm serialized=info.processed_code->serialize(
1.129 paf 593: sizeof(Data_string_serialized_prolog));
1.79 paf 594: Data_string_serialized_prolog& prolog=
1.129 paf 595: *reinterpret_cast<Data_string_serialized_prolog *>(serialized.str);
1.79 paf 596: prolog.version=DATA_STRING_SERIALIZED_VERSION;
1.136 paf 597: prolog.expires=info.scope->expires;
1.79 paf 598:
599: // buffer -write> file
1.129 paf 600: write(f, serialized.str, serialized.length);
1.79 paf 601: } else // expired!
1.136 paf 602: info.scope->expires=0; // flag it so that could be easily checked by caller
1.69 paf 603: }
1.129 paf 604: const String* locked_process_and_cache_put(Request& r,
1.128 paf 605: Value& body_code,
1.136 paf 606: Value* catch_code,
607: Cache_scope& scope,
608: const String& file_spec)
609: {
1.140 paf 610: Locked_process_and_cache_put_action_info info={&r, &scope, &body_code, catch_code, 0};
1.69 paf 611:
1.129 paf 612: const String* result=file_write_action_under_lock(
1.69 paf 613: file_spec,
1.168 misha 614: "cache_put",
615: locked_process_and_cache_put_action,
616: &info,
1.69 paf 617: false/*as_text*/,
618: false/*do_append*/,
1.168 misha 619: false/*block == don't wait till other thread release lock*/) ? info.processed_code: 0;
620:
1.100 paf 621: time_t now=time(0);
1.136 paf 622: if(scope.expires<=now)
1.79 paf 623: cache_delete(file_spec);
624: return result;
1.63 paf 625: }
1.137 paf 626: #ifndef DOXYGEN
1.135 paf 627: struct Cache_get_result {
628: const String* body;
629: bool expired;
1.137 paf 630: };
631: #endif
632: static Cache_get_result cache_get(Request_charsets& charsets, const String& file_spec, time_t now) {
1.140 paf 633: Cache_get_result result={0, false};
1.135 paf 634:
1.129 paf 635: File_read_result file=file_read(charsets, file_spec,
1.63 paf 636: false/*as_text*/,
1.129 paf 637: 0, //no params
638: false/*fail_on_read_problem*/);
639: if(file.success && file.length/* ignore reads which are empty due to
1.72 paf 640: non-unary open+lockEX conflict with lockSH */) {
1.129 paf 641:
1.72 paf 642: Data_string_serialized_prolog& prolog=
1.129 paf 643: *reinterpret_cast<Data_string_serialized_prolog *>(file.str);
1.63 paf 644:
1.135 paf 645: String* body=new String;
1.72 paf 646: if(
1.129 paf 647: file.length>=sizeof(Data_string_serialized_prolog)
1.135 paf 648: && prolog.version==DATA_STRING_SERIALIZED_VERSION) {
649: if(body->deserialize(sizeof(Data_string_serialized_prolog), file.str, file.length)) {
650: result.body=body;
651: result.expired=prolog.expires <= now;
652: }
653: }
1.72 paf 654: }
1.63 paf 655:
1.135 paf 656: return result;
1.63 paf 657: }
1.129 paf 658: static time_t as_expires(Request& r, MethodParams& params,
1.79 paf 659: int index, time_t now) {
660: time_t result;
1.129 paf 661: if(Value* vdate=params[index].as(VDATE_TYPE, false))
662: result=static_cast<VDate*>(vdate)->get_time();
1.79 paf 663: else
1.129 paf 664: result=now+(time_t)params.as_double(index, "lifespan must be date or number", r);
1.79 paf 665:
666: return result;
667: }
1.129 paf 668: static const String& as_file_spec(Request& r, MethodParams& params, int index) {
669: return r.absolute(params.as_string(index, "filespec must be string"));
1.79 paf 670: }
1.129 paf 671: static void _cache(Request& r, MethodParams& params) {
1.158 paf 672: if(params.count()==0)
673: {
674: // return current expiration time
675: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
676: if(!scope)
1.166 misha 677: throw Exception(PARSER_RUNTIME,
1.158 paf 678: 0,
679: "expire-time get without cache");
680: r.write_no_lang(*new VDate(scope->expires));
681: return;
682: }
683:
1.79 paf 684: time_t now=time(0);
685:
686: // ^cache[filename] ^cache(seconds) ^cache[expires date]
1.129 paf 687: if(params.count()==1) {
688: if(params[0].is_string()) { // filename?
1.79 paf 689: cache_delete(as_file_spec(r, params, 0));
690: return;
691: }
692:
693: // secods|expires date
1.135 paf 694: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
695: if(!scope)
1.166 misha 696: throw Exception(PARSER_RUNTIME,
1.129 paf 697: 0,
1.79 paf 698: "expire-time reducing instruction without cache");
699:
1.129 paf 700: time_t expires=as_expires(r, params, 0, now);
1.135 paf 701: if(expires < scope->expires)
702: scope->expires=expires;
1.79 paf 703:
704: return;
1.149 paf 705: } else if(params.count()<3)
1.166 misha 706: throw Exception(PARSER_RUNTIME,
1.149 paf 707: 0,
708: "invalid number of parameters");
1.63 paf 709:
710: // file_spec, expires, body code
1.172 ! misha 711: const String& file_spec=as_file_spec(r, params, 0);
1.65 paf 712:
1.141 paf 713: Cache_scope scope={as_expires(r, params, 1, now), 0};
1.135 paf 714:
715: Temp_hash_value<const String::Body, void*>
716: cache_scope_setter(r.classes_conf, cache_data_name, &scope);
1.136 paf 717: Value& body_code=params.as_junction(2, "body_code must be code");
718: Value* catch_code=0;
719: if(params.count()>3)
720: catch_code=¶ms.as_junction(3, "catch_code must be code");
1.63 paf 721:
1.168 misha 722: if(scope.expires>now) {
723: Cache_get_result cached=cache_get(r.charsets, file_spec, now);
1.69 paf 724:
1.168 misha 725: if(cached.body) { // have cached copy
726: if(cached.expired) {
727: scope.body_from_disk=cached.body; // storing for user to retrive it with ^cache[]
728: } else {
729: // and it's not expired yet write it out
730: r.write_assign_lang(*cached.body);
731: // happy with it
732: return;
733: }
734: }
735:
736: // no cached info or it's already expired
737: try {
738: // try to process and store in file
739: const String* processed_body=locked_process_and_cache_put(r, body_code, catch_code, scope, file_spec);
740: // write it out
741: r.write_assign_lang(*processed_body);
742: // happy with it
743: return;
744: } catch(...) {
745: // we fail during get exclusive lock
746: // nvm we just process it a bit later
747: }
1.69 paf 748: } else {
1.79 paf 749: // instructed not to cache; forget cached copy
1.68 paf 750: cache_delete(file_spec);
1.69 paf 751: }
1.168 misha 752:
753: // process without cacheing
754: const String& processed_body=r.process_to_string(body_code);
755: // write it out
756: r.write_assign_lang(processed_body);
1.63 paf 757: }
758:
1.136 paf 759: static StringOrValue process_try_body_code(Request& r, Value* body_code) {
760: return r.process(*body_code);
761: }
1.129 paf 762: static void _try_operator(Request& r, MethodParams& params) {
763: Value& body_code=params.as_junction(0, "body_code must be code");
764: Value& catch_code=params.as_junction(1, "catch_code must be code");
1.74 paf 765:
1.136 paf 766: Try_catch_result result=try_catch(r,
767: process_try_body_code, &body_code,
768: &catch_code);
769:
770: if(result.exception_should_be_handled)
1.166 misha 771: throw Exception(PARSER_RUNTIME,
1.136 paf 772: result.exception_should_be_handled,
773: "catch block must set $exception.handled to some boolean value, not string");
1.123 paf 774:
1.136 paf 775: // write out processed body_code or catch_code
776: r.write_pass_lang(result.processed_code);
1.74 paf 777: }
778:
1.138 paf 779: static void _throw_operator(Request&, MethodParams& params) {
1.129 paf 780: if(params.count()==1) {
781: if(HashStringValue *hash=params[0].get_hash()) {
782: const char* type=0;
783: if(Value* value=hash->get(exception_type_part_name))
1.78 paf 784: type=value->as_string().cstr();
1.129 paf 785: const String* source=0;
786: if(Value* value=hash->get(exception_source_part_name))
1.74 paf 787: source=&value->as_string();
1.138 paf 788: const char* comment=0;
1.129 paf 789: if(Value* value=hash->get(exception_comment_part_name))
1.74 paf 790: comment=value->as_string().cstr();
791:
1.78 paf 792: throw Exception(type,
1.129 paf 793: source?source:0,
794: "%s", comment?comment:"");
1.74 paf 795: } else
1.166 misha 796: throw Exception(PARSER_RUNTIME,
1.129 paf 797: 0,
1.74 paf 798: "one-param version has hash param");
799: } else {
1.129 paf 800: const char* type=params.as_string(0, "type must be string").cstr();
801: const String& source=params.as_string(1, "source must be string");
802: const char* comment=params.count()>2? params.as_string(2, "comment must be string").cstr()
803: :0;
1.97 paf 804: throw Exception(type, &source, "%s", comment?comment:"");
1.74 paf 805: }
1.132 paf 806: }
1.129 paf 807:
1.150 paf 808: static void _sleep_operator(Request& r, MethodParams& params) {
809: double seconds=params.as_double(0, "seconds must be double", r);
1.151 paf 810: pa_sleep((int)trunc(seconds), (int)trunc(seconds*1000));
1.150 paf 811: }
812:
1.129 paf 813: #if defined(WIN32) && defined(_DEBUG)
814: # define PA_BPT
1.138 paf 815: static void _bpt(Request&, MethodParams&) {
1.129 paf 816: _asm int 3;
817: }
818: #endif
819:
1.10 paf 820: // constructor
821:
1.129 paf 822: VClassMAIN::VClassMAIN(): VClass() {
823: set_name(*new String(MAIN_CLASS_NAME));
824:
825: #ifdef PA_BPT
826: // ^bpt[]
827: add_native_method("bpt", Method::CT_ANY, _bpt, 0, 0);
828: #endif
1.121 paf 829:
1.1 paf 830: // ^if(condition){code-when-true}
831: // ^if(condition){code-when-true}{code-when-false}
1.10 paf 832: add_native_method("if", Method::CT_ANY, _if, 2, 3);
1.1 paf 833:
834: // ^untaint[as-is|uri|sql|js|html|html-typo]{code}
1.59 paf 835: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2);
1.1 paf 836:
837: // ^taint[as-is|uri|sql|js|html|html-typo]{code}
1.10 paf 838: add_native_method("taint", Method::CT_ANY, _taint, 1, 2);
1.1 paf 839:
840: // ^process[code]
1.146 paf 841: add_native_method("process", Method::CT_ANY, _process, 1, 3);
1.1 paf 842:
843: // ^rem{code}
1.51 parser 844: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000);
1.1 paf 845:
846: // ^while(condition){code}
1.162 paf 847: add_native_method("while", Method::CT_ANY, _while, 2, 3);
1.1 paf 848:
849: // ^use[file]
1.10 paf 850: add_native_method("use", Method::CT_ANY, _use, 1, 1);
1.1 paf 851:
1.164 paf 852: // ^break[]
853: add_native_method("break", Method::CT_ANY, _break, 0, 0);
854: // ^continue[]
855: add_native_method("continue", Method::CT_ANY, _continue, 0, 0);
1.54 paf 856: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.10 paf 857: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1);
1.1 paf 858:
859: // ^eval(expr)
860: // ^eval(expr)[format]
1.10 paf 861: add_native_method("eval", Method::CT_ANY, _eval, 1, 2);
1.52 parser 862:
1.1 paf 863: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 864: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
865:
1.63 paf 866:
1.136 paf 867: // ^cache[file_spec](time){code}[{catch code}] time=0 no cache
1.65 paf 868: // ^cache[file_spec] delete cache
1.161 paf 869: // ^cache[] get current expiration time
870: add_native_method("cache", Method::CT_ANY, _cache, 0, 4);
1.63 paf 871:
1.28 parser 872: // switch
873:
874: // ^switch[value]{cases}
875: add_native_method("switch", Method::CT_ANY, _switch, 2, 2);
876:
877: // ^case[value]{code}
1.51 parser 878: add_native_method("case", Method::CT_ANY, _case, 2, 10000);
1.74 paf 879:
880: // try-catch
881:
882: // ^try{code}{catch code}
883: add_native_method("try", Method::CT_ANY, _try_operator, 2, 2);
884: // ^throw[$exception hash]
885: // ^throw[type;source;comment]
886: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
887:
1.150 paf 888: add_native_method("sleep", Method::CT_ANY, _sleep_operator, 1, 1);
1.10 paf 889: }
1.11 paf 890:
891: // constructor & configurator
1.1 paf 892:
1.129 paf 893: VStateless_class& VClassMAIN_create() {
894: return *new VClassMAIN;
1.1 paf 895: }
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