Annotation of parser3/src/classes/op.C, revision 1.175
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:
1.175 ! misha 8: static const char * const IDENT_OP_C="$Date: 2008-02-14 09:10:23 $";
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:
1.175 ! misha 105: static String::Language get_untaint_lang(MethodParams& params, int index){
! 106: const String& lang_name=params.as_string(index, "lang must be string");
! 107: String::Language lang=untaint_lang_name2enum.get(lang_name);
! 108: if(!lang)
! 109: throw Exception(0,
! 110: &lang_name,
! 111: "invalid taint language");
! 112: return lang;
! 113: }
! 114:
1.129 paf 115: static void _untaint(Request& r, MethodParams& params) {
116: String::Language lang;
117: if(params.count()==1)
1.175 ! misha 118: lang=String::L_AS_IS; // mark as simply 'as-is'. useful in html from sql
! 119: else
! 120: lang=get_untaint_lang(params, 0);
1.1 paf 121:
122: {
1.129 paf 123: Value& vbody=params.as_junction(params.count()-1, "body must be code");
1.1 paf 124:
125: Temp_lang temp_lang(r, lang); // set temporarily specified ^untaint[language;
1.86 paf 126: r.write_pass_lang(r.process(vbody)); // process marking tainted with that lang
1.1 paf 127: }
128: }
129:
1.129 paf 130: static void _taint(Request& r, MethodParams& params) {
131: String::Language lang;
132: if(params.count()==1)
1.175 ! misha 133: lang=String::L_TAINTED; // mark as simply 'tainted'. useful in table:create
! 134: else
! 135: lang=get_untaint_lang(params, 0);
1.1 paf 136:
137: {
1.129 paf 138: Value& vbody=params.as_no_junction(params.count()-1, "body must not be code");
1.1 paf 139:
1.129 paf 140: String result;
1.1 paf 141: result.append(
142: vbody.as_string(), // process marking tainted with that lang
143: lang, true); // force result language to specified
144: r.write_pass_lang(result);
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: {
1.129 paf 161: VStateless_class *target_class=target_self->get_last_derived_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
1.129 paf 168: Temp_lang temp_lang(r, String::L_PASS_APPENDED);
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()) {
177: Value& voptions=params.as_no_junction(options_index, "options must not be code");
178: options=voptions.get_hash();
179: if(!options)
1.166 misha 180: throw Exception(PARSER_RUNTIME,
1.146 paf 181: 0,
182: "options must be hash");
183: }
184:
1.129 paf 185: const String* main_alias=0;
1.146 paf 186: const String* file_alias=0;
187: int line_no_alias_offset=0;
188: if(options) {
189: int valid_options=0;
190: if(Value* vmain_alias=options->get(PROCESS_MAIN_OPTION_NAME)) {
191: valid_options++;
192: main_alias=&vmain_alias->as_string();
193: }
194: if(Value* vfile_alias=options->get(PROCESS_FILE_OPTION_NAME)) {
195: valid_options++;
196: file_alias=&vfile_alias->as_string();
197: }
198: if(Value* vline_no_alias_offset=options->get(PROCESS_LINENO_OPTION_NAME)) {
199: valid_options++;
200: line_no_alias_offset=vline_no_alias_offset->as_int();
201: }
202:
203: if(valid_options!=options->count())
1.166 misha 204: throw Exception(PARSER_RUNTIME,
1.146 paf 205: 0,
206: "called with invalid option");
207: }
1.129 paf 208:
1.146 paf 209: uint processe_file_no=file_alias?
210: r.register_file(r.absolute(*file_alias))
211: : pseudo_file_no__process;
212: // process...{string}
213: Value& vjunction=params.as_junction(index, "body must be code");
214: // evaluate source to process
215: const String& source=r.process_to_string(vjunction);
216: r.use_buf(*target_class,
217: source.cstr(String::L_UNSPECIFIED, r.connection(false)),
218: main_alias,
219: processe_file_no,
220: line_no_alias_offset);
1.1 paf 221:
1.73 paf 222: // main_method
1.129 paf 223: main_method=target_class->get_method(main_method_name);
1.73 paf 224: }
225: // after restoring current-request-lang
226: // maybe-execute @main[]
227: if(main_method) {
1.119 paf 228: // temporarily set method_frame's self to target_self
1.129 paf 229: Temp_method_frame_self tmfs(*r.get_method_frame(), *target_self);
1.73 paf 230: // execute!
231: r.execute(*main_method->parser_code);
1.1 paf 232: }
233: }
234:
1.138 paf 235: static void _rem(Request&, MethodParams& params) {
1.129 paf 236: params.as_junction(0, "body must be code");
1.1 paf 237: }
238:
1.129 paf 239: static void _while(Request& r, MethodParams& params) {
1.164 paf 240: Temp_hash_value<const String::Body, void*>
241: cycle_data_setter(r.classes_conf, cycle_data_name, /*any not null flag*/&r);
242:
1.170 misha 243: Value& vcondition=params.as_expression(0, "condition must be number, bool or expression");
244:
1.162 paf 245: Value& body_code=params.as_junction(1, "body must be code");
246: Value* delim_maybe_code=params.count()>2?¶ms[2]:0;
1.1 paf 247:
248: // while...
249: int endless_loop_count=0;
1.162 paf 250: bool need_delim=false;
1.1 paf 251: while(true) {
1.18 parser 252: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
1.166 misha 253: throw Exception(PARSER_RUNTIME,
1.129 paf 254: 0,
1.1 paf 255: "endless loop detected");
256:
1.86 paf 257: bool condition=r.process_to_value(vcondition,
1.1 paf 258: false/*don't intercept string*/).as_bool();
259: if(!condition) // ...condition is true
260: break;
261:
1.162 paf 262: StringOrValue sv_processed=r.process(body_code);
1.164 paf 263: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.162 paf 264: const String* s_processed=sv_processed.get_string();
265: if(delim_maybe_code && s_processed && s_processed->length()) { // delimiter set and we have body
266: if(need_delim) // need delim & iteration produced string?
267: r.write_pass_lang(r.process(*delim_maybe_code));
268: need_delim=true;
269: }
270: r.write_pass_lang(sv_processed);
1.164 paf 271:
272: if(lskip==Request::SKIP_BREAK)
273: break;
1.1 paf 274: }
275: }
276:
1.129 paf 277: static void _use(Request& r, MethodParams& params) {
1.171 misha 278: Value& vfile=params.as_no_junction(0, FILE_NAME_MUST_NOT_BE_CODE);
1.113 paf 279: r.use_file(r.main_class, vfile.as_string());
1.1 paf 280: }
281:
1.164 paf 282: static void set_skip(Request& r, Request::Skip askip) {
283: void* data=r.classes_conf.get(cycle_data_name);
284: if(!data)
1.166 misha 285: throw Exception(PARSER_RUNTIME,
1.164 paf 286: 0,
287: "without cycle");
288:
289: r.set_skip(askip);
290: }
291:
292: static void _break(Request& r, MethodParams&) {
293: set_skip(r, Request::SKIP_BREAK);
294: }
295:
296: static void _continue(Request& r, MethodParams&) {
297: set_skip(r, Request::SKIP_CONTINUE);
298: }
299:
1.129 paf 300: static void _for(Request& r, MethodParams& params) {
1.164 paf 301: Temp_hash_value<const String::Body, void*>
302: cycle_data_setter(r.classes_conf, cycle_data_name, /*any not null flag*/&r);
303:
1.129 paf 304: const String& var_name=params.as_string(0, "var name must be string");
305: int from=params.as_int(1, "from must be int", r);
306: int to=params.as_int(2, "to must be int", r);
307: Value& body_code=params.as_junction(3, "body must be code");
308: Value* delim_maybe_code=params.count()>4?¶ms[4]:0;
1.1 paf 309:
1.57 paf 310: if(to-from>=MAX_LOOPS) // too long loop?
1.166 misha 311: throw Exception(PARSER_RUNTIME,
1.129 paf 312: 0,
1.57 paf 313: "endless loop detected");
314:
1.1 paf 315: bool need_delim=false;
1.129 paf 316: VInt* vint=new VInt(0);
1.154 paf 317:
318: VMethodFrame& caller=*r.get_method_frame()->caller();
319: caller.put_element(caller, var_name, vint, false);
1.1 paf 320: for(int i=from; i<=to; i++) {
321: vint->set_int(i);
322:
1.108 paf 323: StringOrValue sv_processed=r.process(body_code);
1.164 paf 324: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.129 paf 325: const String* s_processed=sv_processed.get_string();
326: if(delim_maybe_code && s_processed && s_processed->length()) { // delimiter set and we have body
1.108 paf 327: if(need_delim) // need delim & iteration produced string?
1.86 paf 328: r.write_pass_lang(r.process(*delim_maybe_code));
1.1 paf 329: need_delim=true;
330: }
1.108 paf 331: r.write_pass_lang(sv_processed);
1.164 paf 332:
333: if(lskip==Request::SKIP_BREAK)
334: break;
1.1 paf 335: }
336: }
337:
1.129 paf 338: static void _eval(Request& r, MethodParams& params) {
339: Value& expr=params.as_junction(0, "need expression");
1.1 paf 340: // evaluate expresion
1.129 paf 341: Value& value_result=r.process_to_value(expr,
1.165 misha 342: false/*don't intercept string*/).as_expr_result();
1.129 paf 343: if(params.count()>1) {
344: Value& fmt=params.as_no_junction(1, "fmt must not be code");
345: r.write_no_lang(String(format(value_result.as_double(), fmt.as_string().cstrm())));
1.91 paf 346: } else
1.129 paf 347: r.write_no_lang(value_result);
1.1 paf 348: }
349:
1.129 paf 350: static void _connect(Request& r, MethodParams& params) {
1.63 paf 351: #ifdef RESOURCES_DEBUG
352: struct timeval mt[2];
353: #endif
1.129 paf 354: Value& url=params.as_no_junction(0, "url must not be code");
355: Value& body_code=params.as_junction(1, "body must be code");
1.1 paf 356:
1.129 paf 357: Table* protocol2driver_and_client=0;
358: if(Value* sql=r.main_class.get_element(String(MAIN_SQL_NAME), r.main_class, false)) {
359: if(Value* element=sql->get_element(String(MAIN_SQL_DRIVERS_NAME), *sql, false)) {
1.113 paf 360: protocol2driver_and_client=element->get_table();
361: }
362: }
1.11 paf 363:
1.63 paf 364: #ifdef RESOURCES_DEBUG
365: //measure:before
366: gettimeofday(&mt[0],NULL);
367: #endif
1.1 paf 368: // connect
1.142 paf 369: SQL_Connection* connection=SQL_driver_manager->get_connection(url.as_string(),
1.144 paf 370: protocol2driver_and_client,
371: r.charsets.source().NAME().cstr());
1.1 paf 372:
1.63 paf 373: #ifdef RESOURCES_DEBUG
374: //measure:after connect
375: gettimeofday(&mt[1],NULL);
376:
377: double t[2];
378: for(int i=0;i<2;i++)
379: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
380:
381: r.sql_connect_time+=t[1]-t[0];
382: #endif
1.129 paf 383: Temp_connection temp_connection(r, connection);
1.1 paf 384: // execute body
1.53 parser 385: try {
1.86 paf 386: r.write_assign_lang(r.process(body_code));
1.129 paf 387: connection->commit();
388: connection->close();
1.75 paf 389: } catch(...) { // process problem
1.129 paf 390: connection->rollback();
391: connection->close();
392: rethrow;
1.1 paf 393: }
394: }
395:
1.41 parser 396: #ifndef DOXYGEN
1.129 paf 397: class Switch_data: public PA_Object {
398: public:
399: Request& r;
400: Value& searching;
401: Value* found;
402: Value* _default;
403: public:
404: Switch_data(Request& ar, Value& asearching):
405: r(ar), searching(asearching) {}
1.28 parser 406: };
1.41 parser 407: #endif
1.129 paf 408: static void _switch(Request& r, MethodParams& params) {
409: Switch_data* data=new Switch_data(r, r.process_to_value(params[0]));
1.135 paf 410: Temp_hash_value<const String::Body, void*>
1.129 paf 411: switch_data_setter(r.classes_conf, switch_data_name, data);
1.28 parser 412:
1.129 paf 413: Value& cases_code=params.as_junction(1, "switch cases must be code");
1.82 paf 414: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
415: // because of stacked WWrapper used there as wcontext
1.84 paf 416: r.process(cases_code, true/*intercept_string*/);
1.147 paf 417: if(Value* selected_code=data->found? data->found: data->_default)
1.107 paf 418: r.write_pass_lang(r.process(*selected_code));
1.28 parser 419: }
420:
1.129 paf 421: static void _case(Request& r, MethodParams& params) {
422: Switch_data* data=static_cast<Switch_data*>(r.classes_conf.get(switch_data_name));
1.38 parser 423: if(!data)
1.166 misha 424: throw Exception(PARSER_RUNTIME,
1.129 paf 425: 0,
1.38 parser 426: "without switch");
1.28 parser 427:
1.129 paf 428: int count=params.count();
429: Value& code=params.as_junction(--count, "case result must be code");
1.83 paf 430:
1.163 paf 431: Value& searching=data->searching;
432: bool we_are_searching_string_or_void=searching.is_string() || searching.is_void();
1.28 parser 433: for(int i=0; i<count; i++) {
1.129 paf 434: Value& value=r.process_to_value(params[i]);
1.28 parser 435:
1.157 paf 436: if(value.is_string() && value.as_string() == CASE_DEFAULT_VALUE) {
1.129 paf 437: data->_default=&code;
1.28 parser 438: break;
439: }
440:
441: bool matches;
1.163 paf 442: if(we_are_searching_string_or_void)
443: matches=searching.as_string() == value.as_string();
1.28 parser 444: else
1.163 paf 445: matches=searching.as_double() == value.as_double();
1.28 parser 446:
447: if(matches) {
1.82 paf 448: if(data->found)
1.166 misha 449: throw Exception(PARSER_RUNTIME,
1.129 paf 450: 0,
1.82 paf 451: "duplicate found");
452:
1.129 paf 453: data->found=&code;
1.28 parser 454: break;
455: }
456: }
457: }
1.136 paf 458: #ifndef DOXYGEN
459: struct Try_catch_result {
460: StringOrValue processed_code;
461: const String* exception_should_be_handled;
462:
463: Try_catch_result(): exception_should_be_handled(0) {}
464: };
465: #endif
466:
467: /// used by ^try and ^cache, @returns $exception.handled[string] if any
468: template<class I>
469: static Try_catch_result try_catch(Request& r,
470: StringOrValue body_code(Request&, I), I info,
1.160 paf 471: Value* catch_code, bool could_be_handled_by_caller=false)
1.136 paf 472: {
473: Try_catch_result result;
474: if(!catch_code) {
475: result.processed_code=body_code(r, info);
476: return result;
477: }
478:
479: // taking snapshot of try-context
480: Request_context_saver try_context(r);
481: try {
482: result.processed_code=body_code(r, info);
483: } catch(const Exception& e) {
484: Request_context_saver throw_context(r); // taking snapshot of throw-context [stack trace contains error]
485: Request::Exception_details details=r.get_details(e);
486: try_context.restore(); // restoring try-context to perform catch-code
487:
488: Junction* junction=catch_code->get_junction();
489: Value* method_frame=junction->method_frame;
490: Value* saved_exception_var_value=method_frame->get_element(exception_var_name, *method_frame, false);
1.154 paf 491: VMethodFrame& frame=*junction->method_frame;
492: frame.put_element(frame, exception_var_name, &details.vhash, false);
1.136 paf 493: result.processed_code=r.process(*catch_code);
494:
495: // retriving $exception.handled, restoring $exception var
496: Value* vhandled=details.vhash.hash().get(exception_handled_part_name);
1.154 paf 497: frame.put_element(frame, exception_var_name, saved_exception_var_value, false);
1.136 paf 498:
499: bool bhandled=false;
500: if(vhandled) {
501: if(vhandled->is_string()) { // not simple $exception.handled(1/0)?
1.160 paf 502: if(could_be_handled_by_caller) { // and we can possibly handle it
503: result.exception_should_be_handled=vhandled->get_string(); // considering 'recovered' and let the caller recover
504: return result;
505: }
506:
507: bhandled=false;
508: } else
509: bhandled=vhandled->as_bool();
1.136 paf 510: }
511:
512: if(!bhandled) {
513: throw_context.restore(); // restoring throw-context [exception were not handled]
514: rethrow;
515: }
516: }
517: return result;
518: }
1.28 parser 519:
1.63 paf 520: // cache--
521:
522: // consts
523:
1.152 paf 524: const int DATA_STRING_SERIALIZED_VERSION=0x0006;
1.63 paf 525:
526: // helper types
527:
528: #ifndef DOXYGEN
529: struct Data_string_serialized_prolog {
530: int version;
1.79 paf 531: time_t expires;
1.63 paf 532: };
533: #endif
534:
1.68 paf 535: void cache_delete(const String& file_spec) {
1.167 misha 536: file_delete(file_spec, false/*fail_on_problem*/);
1.63 paf 537: }
1.69 paf 538:
539: #ifndef DOXYGEN
1.135 paf 540: struct Cache_scope {
1.129 paf 541: public:
1.79 paf 542: time_t expires;
1.135 paf 543: const String* body_from_disk;
1.79 paf 544: };
1.69 paf 545: struct Locked_process_and_cache_put_action_info {
546: Request *r;
1.136 paf 547: Cache_scope *scope;
1.167 misha 548: Value* body_code;
549: Value* catch_code;
1.136 paf 550: const String* processed_code;
1.69 paf 551: };
552: #endif
1.136 paf 553:
554:
555:
556: static StringOrValue process_cache_body_code(Request& r, Value* body_code) {
1.153 paf 557: return StringOrValue(r.process_to_string(*body_code));
1.136 paf 558: }
559:
1.129 paf 560: /* @todo maybe network order worth spending some effort?
561: don't bothering myself with network byte order,
562: am not planning to be able to move resulting file across platforms
563: */
1.69 paf 564: static void locked_process_and_cache_put_action(int f, void *context) {
565: Locked_process_and_cache_put_action_info& info=
566: *static_cast<Locked_process_and_cache_put_action_info *>(context);
1.129 paf 567:
1.160 paf 568: const String* body_from_disk=info.scope->body_from_disk;
1.69 paf 569: // body->process
1.136 paf 570: Try_catch_result result=try_catch(*info.r,
571: process_cache_body_code, info.body_code,
1.160 paf 572: info.catch_code, body_from_disk!=0 /*we have something old=we can handle=recover later*/);
1.136 paf 573:
574: if(result.exception_should_be_handled) {
575: if(*result.exception_should_be_handled==CACHE_EXCEPTION_HANDLED_CACHE_NAME) {
1.160 paf 576: assert(body_from_disk);
577: info.processed_code=body_from_disk;
1.136 paf 578: } else
1.166 misha 579: throw Exception(PARSER_RUNTIME,
1.136 paf 580: result.exception_should_be_handled,
581: "$"EXCEPTION_VAR_NAME"."EXCEPTION_HANDLED_PART_NAME" value must be "
582: "either boolean or string '"CACHE_EXCEPTION_HANDLED_CACHE_NAME"'");
583: } else
584: info.processed_code=&result.processed_code.as_string();
1.69 paf 585:
1.79 paf 586: // expiration time not spoiled by ^cache(0) or something?
1.136 paf 587: if(info.scope->expires > time(0)) {
1.79 paf 588: // string -serialize> buffer
1.136 paf 589: String::Cm serialized=info.processed_code->serialize(
1.129 paf 590: sizeof(Data_string_serialized_prolog));
1.79 paf 591: Data_string_serialized_prolog& prolog=
1.129 paf 592: *reinterpret_cast<Data_string_serialized_prolog *>(serialized.str);
1.79 paf 593: prolog.version=DATA_STRING_SERIALIZED_VERSION;
1.136 paf 594: prolog.expires=info.scope->expires;
1.79 paf 595:
596: // buffer -write> file
1.129 paf 597: write(f, serialized.str, serialized.length);
1.79 paf 598: } else // expired!
1.136 paf 599: info.scope->expires=0; // flag it so that could be easily checked by caller
1.69 paf 600: }
1.129 paf 601: const String* locked_process_and_cache_put(Request& r,
1.128 paf 602: Value& body_code,
1.136 paf 603: Value* catch_code,
604: Cache_scope& scope,
605: const String& file_spec)
606: {
1.140 paf 607: Locked_process_and_cache_put_action_info info={&r, &scope, &body_code, catch_code, 0};
1.69 paf 608:
1.129 paf 609: const String* result=file_write_action_under_lock(
1.69 paf 610: file_spec,
1.168 misha 611: "cache_put",
612: locked_process_and_cache_put_action,
613: &info,
1.69 paf 614: false/*as_text*/,
615: false/*do_append*/,
1.173 misha 616: false/*block == don't wait till other thread release lock*/,
617: false/*dun throw exception if lock failed*/) ? info.processed_code: 0;
1.168 misha 618:
1.100 paf 619: time_t now=time(0);
1.136 paf 620: if(scope.expires<=now)
1.79 paf 621: cache_delete(file_spec);
622: return result;
1.63 paf 623: }
1.137 paf 624: #ifndef DOXYGEN
1.135 paf 625: struct Cache_get_result {
626: const String* body;
627: bool expired;
1.137 paf 628: };
629: #endif
630: static Cache_get_result cache_get(Request_charsets& charsets, const String& file_spec, time_t now) {
1.140 paf 631: Cache_get_result result={0, false};
1.135 paf 632:
1.129 paf 633: File_read_result file=file_read(charsets, file_spec,
1.63 paf 634: false/*as_text*/,
1.129 paf 635: 0, //no params
636: false/*fail_on_read_problem*/);
637: if(file.success && file.length/* ignore reads which are empty due to
1.72 paf 638: non-unary open+lockEX conflict with lockSH */) {
1.129 paf 639:
1.72 paf 640: Data_string_serialized_prolog& prolog=
1.129 paf 641: *reinterpret_cast<Data_string_serialized_prolog *>(file.str);
1.63 paf 642:
1.135 paf 643: String* body=new String;
1.72 paf 644: if(
1.129 paf 645: file.length>=sizeof(Data_string_serialized_prolog)
1.135 paf 646: && prolog.version==DATA_STRING_SERIALIZED_VERSION) {
647: if(body->deserialize(sizeof(Data_string_serialized_prolog), file.str, file.length)) {
648: result.body=body;
649: result.expired=prolog.expires <= now;
650: }
651: }
1.72 paf 652: }
1.63 paf 653:
1.135 paf 654: return result;
1.63 paf 655: }
1.129 paf 656: static time_t as_expires(Request& r, MethodParams& params,
1.79 paf 657: int index, time_t now) {
658: time_t result;
1.129 paf 659: if(Value* vdate=params[index].as(VDATE_TYPE, false))
660: result=static_cast<VDate*>(vdate)->get_time();
1.79 paf 661: else
1.129 paf 662: result=now+(time_t)params.as_double(index, "lifespan must be date or number", r);
1.79 paf 663:
664: return result;
665: }
1.129 paf 666: static const String& as_file_spec(Request& r, MethodParams& params, int index) {
667: return r.absolute(params.as_string(index, "filespec must be string"));
1.79 paf 668: }
1.129 paf 669: static void _cache(Request& r, MethodParams& params) {
1.173 misha 670: if(params.count()==0) {
671: // ^cache[] -- return current expiration time
1.158 paf 672: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
673: if(!scope)
1.166 misha 674: throw Exception(PARSER_RUNTIME,
1.158 paf 675: 0,
676: "expire-time get without cache");
677: r.write_no_lang(*new VDate(scope->expires));
678: return;
679: }
680:
1.79 paf 681: time_t now=time(0);
682:
1.129 paf 683: if(params.count()==1) {
1.173 misha 684: // ^cache[filename] ^cache(seconds) ^cache[expires date]
1.129 paf 685: if(params[0].is_string()) { // filename?
1.79 paf 686: cache_delete(as_file_spec(r, params, 0));
687: return;
688: }
689:
690: // secods|expires date
1.135 paf 691: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
692: if(!scope)
1.166 misha 693: throw Exception(PARSER_RUNTIME,
1.129 paf 694: 0,
1.79 paf 695: "expire-time reducing instruction without cache");
696:
1.129 paf 697: time_t expires=as_expires(r, params, 0, now);
1.135 paf 698: if(expires < scope->expires)
699: scope->expires=expires;
1.79 paf 700:
701: return;
1.149 paf 702: } else if(params.count()<3)
1.166 misha 703: throw Exception(PARSER_RUNTIME,
1.149 paf 704: 0,
705: "invalid number of parameters");
1.63 paf 706:
707: // file_spec, expires, body code
1.172 misha 708: const String& file_spec=as_file_spec(r, params, 0);
1.65 paf 709:
1.141 paf 710: Cache_scope scope={as_expires(r, params, 1, now), 0};
1.135 paf 711:
712: Temp_hash_value<const String::Body, void*>
713: cache_scope_setter(r.classes_conf, cache_data_name, &scope);
1.136 paf 714: Value& body_code=params.as_junction(2, "body_code must be code");
715: Value* catch_code=0;
716: if(params.count()>3)
717: catch_code=¶ms.as_junction(3, "catch_code must be code");
1.63 paf 718:
1.168 misha 719: if(scope.expires>now) {
720: Cache_get_result cached=cache_get(r.charsets, file_spec, now);
1.69 paf 721:
1.168 misha 722: if(cached.body) { // have cached copy
1.174 misha 723: if(cached.expired) {
724: scope.body_from_disk=cached.body; // storing for user to retrive it with ^cache[]
725: } else {
726: // and it's not expired yet write it out
1.168 misha 727: r.write_assign_lang(*cached.body);
728: // happy with it
729: return;
730: }
731: }
732:
733: // no cached info or it's already expired
1.173 misha 734:
735: // trying to process it under lock and store result in file
1.174 misha 736: const String* processed_body=locked_process_and_cache_put(r, body_code, catch_code, scope, file_spec);
1.173 misha 737: if(processed_body){
1.174 misha 738: // write it out
739: r.write_assign_lang(*processed_body);
740: // happy with it
741: return;
1.173 misha 742: } else {
743: // we fail while get exclusive lock. nvm, we just execute body_code a bit later
1.174 misha 744: }
1.69 paf 745: } else {
1.79 paf 746: // instructed not to cache; forget cached copy
1.68 paf 747: cache_delete(file_spec);
1.69 paf 748: }
1.168 misha 749:
750: // process without cacheing
751: const String& processed_body=r.process_to_string(body_code);
752: // write it out
753: r.write_assign_lang(processed_body);
1.63 paf 754: }
755:
1.136 paf 756: static StringOrValue process_try_body_code(Request& r, Value* body_code) {
757: return r.process(*body_code);
758: }
1.129 paf 759: static void _try_operator(Request& r, MethodParams& params) {
760: Value& body_code=params.as_junction(0, "body_code must be code");
761: Value& catch_code=params.as_junction(1, "catch_code must be code");
1.74 paf 762:
1.136 paf 763: Try_catch_result result=try_catch(r,
764: process_try_body_code, &body_code,
765: &catch_code);
766:
767: if(result.exception_should_be_handled)
1.166 misha 768: throw Exception(PARSER_RUNTIME,
1.136 paf 769: result.exception_should_be_handled,
770: "catch block must set $exception.handled to some boolean value, not string");
1.123 paf 771:
1.136 paf 772: // write out processed body_code or catch_code
773: r.write_pass_lang(result.processed_code);
1.74 paf 774: }
775:
1.138 paf 776: static void _throw_operator(Request&, MethodParams& params) {
1.129 paf 777: if(params.count()==1) {
778: if(HashStringValue *hash=params[0].get_hash()) {
779: const char* type=0;
780: if(Value* value=hash->get(exception_type_part_name))
1.78 paf 781: type=value->as_string().cstr();
1.129 paf 782: const String* source=0;
783: if(Value* value=hash->get(exception_source_part_name))
1.74 paf 784: source=&value->as_string();
1.138 paf 785: const char* comment=0;
1.129 paf 786: if(Value* value=hash->get(exception_comment_part_name))
1.74 paf 787: comment=value->as_string().cstr();
788:
1.78 paf 789: throw Exception(type,
1.129 paf 790: source?source:0,
791: "%s", comment?comment:"");
1.74 paf 792: } else
1.166 misha 793: throw Exception(PARSER_RUNTIME,
1.129 paf 794: 0,
1.74 paf 795: "one-param version has hash param");
796: } else {
1.129 paf 797: const char* type=params.as_string(0, "type must be string").cstr();
798: const String& source=params.as_string(1, "source must be string");
799: const char* comment=params.count()>2? params.as_string(2, "comment must be string").cstr()
800: :0;
1.97 paf 801: throw Exception(type, &source, "%s", comment?comment:"");
1.74 paf 802: }
1.132 paf 803: }
1.129 paf 804:
1.150 paf 805: static void _sleep_operator(Request& r, MethodParams& params) {
806: double seconds=params.as_double(0, "seconds must be double", r);
1.151 paf 807: pa_sleep((int)trunc(seconds), (int)trunc(seconds*1000));
1.150 paf 808: }
809:
1.129 paf 810: #if defined(WIN32) && defined(_DEBUG)
811: # define PA_BPT
1.138 paf 812: static void _bpt(Request&, MethodParams&) {
1.129 paf 813: _asm int 3;
814: }
815: #endif
816:
1.10 paf 817: // constructor
818:
1.129 paf 819: VClassMAIN::VClassMAIN(): VClass() {
820: set_name(*new String(MAIN_CLASS_NAME));
821:
822: #ifdef PA_BPT
823: // ^bpt[]
824: add_native_method("bpt", Method::CT_ANY, _bpt, 0, 0);
825: #endif
1.121 paf 826:
1.1 paf 827: // ^if(condition){code-when-true}
828: // ^if(condition){code-when-true}{code-when-false}
1.10 paf 829: add_native_method("if", Method::CT_ANY, _if, 2, 3);
1.1 paf 830:
831: // ^untaint[as-is|uri|sql|js|html|html-typo]{code}
1.59 paf 832: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2);
1.1 paf 833:
834: // ^taint[as-is|uri|sql|js|html|html-typo]{code}
1.10 paf 835: add_native_method("taint", Method::CT_ANY, _taint, 1, 2);
1.1 paf 836:
837: // ^process[code]
1.146 paf 838: add_native_method("process", Method::CT_ANY, _process, 1, 3);
1.1 paf 839:
840: // ^rem{code}
1.51 parser 841: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000);
1.1 paf 842:
843: // ^while(condition){code}
1.162 paf 844: add_native_method("while", Method::CT_ANY, _while, 2, 3);
1.1 paf 845:
846: // ^use[file]
1.10 paf 847: add_native_method("use", Method::CT_ANY, _use, 1, 1);
1.1 paf 848:
1.164 paf 849: // ^break[]
850: add_native_method("break", Method::CT_ANY, _break, 0, 0);
851: // ^continue[]
852: add_native_method("continue", Method::CT_ANY, _continue, 0, 0);
1.54 paf 853: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.10 paf 854: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1);
1.1 paf 855:
856: // ^eval(expr)
857: // ^eval(expr)[format]
1.10 paf 858: add_native_method("eval", Method::CT_ANY, _eval, 1, 2);
1.52 parser 859:
1.1 paf 860: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 861: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
862:
1.63 paf 863:
1.136 paf 864: // ^cache[file_spec](time){code}[{catch code}] time=0 no cache
1.65 paf 865: // ^cache[file_spec] delete cache
1.161 paf 866: // ^cache[] get current expiration time
867: add_native_method("cache", Method::CT_ANY, _cache, 0, 4);
1.63 paf 868:
1.28 parser 869: // switch
870:
871: // ^switch[value]{cases}
872: add_native_method("switch", Method::CT_ANY, _switch, 2, 2);
873:
874: // ^case[value]{code}
1.51 parser 875: add_native_method("case", Method::CT_ANY, _case, 2, 10000);
1.74 paf 876:
877: // try-catch
878:
879: // ^try{code}{catch code}
880: add_native_method("try", Method::CT_ANY, _try_operator, 2, 2);
881: // ^throw[$exception hash]
882: // ^throw[type;source;comment]
883: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
884:
1.150 paf 885: add_native_method("sleep", Method::CT_ANY, _sleep_operator, 1, 1);
1.10 paf 886: }
1.11 paf 887:
888: // constructor & configurator
1.1 paf 889:
1.129 paf 890: VStateless_class& VClassMAIN_create() {
891: return *new VClassMAIN;
1.1 paf 892: }
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