Annotation of parser3/src/classes/op.C, revision 1.186
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:
1.186 ! misha 8: static const char * const IDENT_OP_C="$Date: 2009-05-04 09:26:19 $";
1.1 paf 9:
1.13 paf 10: #include "classes.h"
1.129 paf 11: #include "pa_vmethod_frame.h"
12:
1.1 paf 13: #include "pa_common.h"
1.134 paf 14: #include "pa_os.h"
1.1 paf 15: #include "pa_request.h"
16: #include "pa_vint.h"
17: #include "pa_sql_connection.h"
1.79 paf 18: #include "pa_vdate.h"
1.105 paf 19: #include "pa_vmethod_frame.h"
1.129 paf 20: #include "pa_vclass.h"
1.144 paf 21: #include "pa_charset.h"
1.1 paf 22:
1.18 parser 23: // limits
24:
1.162 paf 25: #define MAX_LOOPS 20000
1.18 parser 26:
1.10 paf 27: // defines
28:
1.82 paf 29: #define CASE_DEFAULT_VALUE "DEFAULT"
1.146 paf 30: #define PROCESS_MAIN_OPTION_NAME "main"
31: #define PROCESS_FILE_OPTION_NAME "file"
32: #define PROCESS_LINENO_OPTION_NAME "lineno"
1.11 paf 33:
1.10 paf 34: // class
35:
1.113 paf 36: class VClassMAIN: public VClass {
1.10 paf 37: public:
1.129 paf 38: VClassMAIN();
1.10 paf 39: };
40:
1.164 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)
1.185 misha 100: r.process_write(*params.get(1));
1.129 paf 101: else if(params.count()>2)
1.185 misha 102: r.process_write(*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)
1.183 misha 109: throw Exception(PARSER_RUNTIME,
1.175 misha 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;
1.186 ! misha 250: if(delim_maybe_code){ // delimiter set
1.185 misha 251: bool need_delim=false;
252: while(true) {
253: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
254: throw Exception(PARSER_RUNTIME,
255: 0,
256: "endless loop detected");
257:
258: if(!r.process_to_value(vcondition, false/*don't intercept string*/).as_bool())
259: break;
1.1 paf 260:
1.185 misha 261: StringOrValue sv_processed=r.process(body_code);
262: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 ! misha 263:
1.185 misha 264: const String* s_processed=sv_processed.get_string();
1.186 ! misha 265: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 266: if(need_delim) // need delim & iteration produced string?
267: r.write_pass_lang(r.process(*delim_maybe_code));
268: else
269: need_delim=true;
270: }
271: r.write_pass_lang(sv_processed);
1.1 paf 272:
1.185 misha 273: if(lskip==Request::SKIP_BREAK)
274: break;
1.162 paf 275: }
1.185 misha 276: } else {
277: while(true) {
278: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
279: throw Exception(PARSER_RUNTIME,
280: 0,
281: "endless loop detected");
282:
283: if(!r.process_to_value(vcondition, false/*don't intercept string*/).as_bool())
284: break;
1.164 paf 285:
1.185 misha 286: r.process_write(body_code);
287: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
288:
289: if(lskip==Request::SKIP_BREAK)
290: break;
291: }
1.1 paf 292: }
293: }
294:
1.129 paf 295: static void _use(Request& r, MethodParams& params) {
1.171 misha 296: Value& vfile=params.as_no_junction(0, FILE_NAME_MUST_NOT_BE_CODE);
1.113 paf 297: r.use_file(r.main_class, vfile.as_string());
1.1 paf 298: }
299:
1.164 paf 300: static void set_skip(Request& r, Request::Skip askip) {
301: void* data=r.classes_conf.get(cycle_data_name);
302: if(!data)
1.166 misha 303: throw Exception(PARSER_RUNTIME,
1.164 paf 304: 0,
305: "without cycle");
306:
307: r.set_skip(askip);
308: }
309:
310: static void _break(Request& r, MethodParams&) {
311: set_skip(r, Request::SKIP_BREAK);
312: }
313:
314: static void _continue(Request& r, MethodParams&) {
315: set_skip(r, Request::SKIP_CONTINUE);
316: }
317:
1.129 paf 318: static void _for(Request& r, MethodParams& params) {
1.164 paf 319: Temp_hash_value<const String::Body, void*>
320: cycle_data_setter(r.classes_conf, cycle_data_name, /*any not null flag*/&r);
321:
1.129 paf 322: const String& var_name=params.as_string(0, "var name must be string");
323: int from=params.as_int(1, "from must be int", r);
324: int to=params.as_int(2, "to must be int", r);
1.186 ! misha 325: Value& body_code=params.as_junction(3, "body must be code");
1.129 paf 326: Value* delim_maybe_code=params.count()>4?¶ms[4]:0;
1.1 paf 327:
1.57 paf 328: if(to-from>=MAX_LOOPS) // too long loop?
1.166 misha 329: throw Exception(PARSER_RUNTIME,
1.129 paf 330: 0,
1.57 paf 331: "endless loop detected");
332:
1.129 paf 333: VInt* vint=new VInt(0);
1.154 paf 334:
335: VMethodFrame& caller=*r.get_method_frame()->caller();
336: caller.put_element(caller, var_name, vint, false);
1.186 ! misha 337: if(delim_maybe_code){ // delimiter set
1.185 misha 338: bool need_delim=false;
339:
340: for(int i=from; i<=to; i++) {
341: vint->set_int(i);
342:
343: StringOrValue sv_processed=r.process(body_code);
344: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 ! misha 345:
1.185 misha 346: const String* s_processed=sv_processed.get_string();
1.186 ! misha 347: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 348: if(need_delim) // need delim & iteration produced string?
349: r.write_pass_lang(r.process(*delim_maybe_code));
350: else
351: need_delim=true;
352: }
353: r.write_pass_lang(sv_processed);
1.1 paf 354:
1.185 misha 355: if(lskip==Request::SKIP_BREAK)
356: break;
1.1 paf 357: }
1.185 misha 358: } else {
359: for(int i=from; i<=to; i++) {
360: vint->set_int(i);
361:
362: r.process_write(body_code);
363: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.164 paf 364:
1.185 misha 365: if(lskip==Request::SKIP_BREAK)
366: break;
367: }
1.1 paf 368: }
369: }
370:
1.129 paf 371: static void _eval(Request& r, MethodParams& params) {
372: Value& expr=params.as_junction(0, "need expression");
1.1 paf 373: // evaluate expresion
1.129 paf 374: Value& value_result=r.process_to_value(expr,
1.165 misha 375: false/*don't intercept string*/).as_expr_result();
1.129 paf 376: if(params.count()>1) {
1.177 misha 377: const String& fmt=params.as_string(1, "fmt must be string").trim();
378: if(fmt.is_empty()){
379: r.write_no_lang(value_result);
380: } else {
381: r.write_no_lang(String(format(value_result.as_double(), fmt.cstrm())));
382: }
1.91 paf 383: } else
1.129 paf 384: r.write_no_lang(value_result);
1.1 paf 385: }
386:
1.129 paf 387: static void _connect(Request& r, MethodParams& params) {
1.63 paf 388: #ifdef RESOURCES_DEBUG
389: struct timeval mt[2];
390: #endif
1.129 paf 391: Value& url=params.as_no_junction(0, "url must not be code");
392: Value& body_code=params.as_junction(1, "body must be code");
1.1 paf 393:
1.129 paf 394: Table* protocol2driver_and_client=0;
395: if(Value* sql=r.main_class.get_element(String(MAIN_SQL_NAME), r.main_class, false)) {
396: if(Value* element=sql->get_element(String(MAIN_SQL_DRIVERS_NAME), *sql, false)) {
1.113 paf 397: protocol2driver_and_client=element->get_table();
398: }
399: }
1.11 paf 400:
1.63 paf 401: #ifdef RESOURCES_DEBUG
402: //measure:before
403: gettimeofday(&mt[0],NULL);
404: #endif
1.1 paf 405: // connect
1.142 paf 406: SQL_Connection* connection=SQL_driver_manager->get_connection(url.as_string(),
1.144 paf 407: protocol2driver_and_client,
1.180 misha 408: r.charsets.source().NAME().cstr(),
409: r.request_info.document_root);
1.1 paf 410:
1.63 paf 411: #ifdef RESOURCES_DEBUG
412: //measure:after connect
413: gettimeofday(&mt[1],NULL);
414:
415: double t[2];
416: for(int i=0;i<2;i++)
417: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
418:
419: r.sql_connect_time+=t[1]-t[0];
420: #endif
1.129 paf 421: Temp_connection temp_connection(r, connection);
1.1 paf 422: // execute body
1.53 parser 423: try {
1.86 paf 424: r.write_assign_lang(r.process(body_code));
1.129 paf 425: connection->commit();
426: connection->close();
1.75 paf 427: } catch(...) { // process problem
1.129 paf 428: connection->rollback();
429: connection->close();
430: rethrow;
1.1 paf 431: }
432: }
433:
1.41 parser 434: #ifndef DOXYGEN
1.129 paf 435: class Switch_data: public PA_Object {
436: public:
437: Request& r;
1.181 misha 438: const String* searching_string;
439: double searching_double;
1.129 paf 440: Value* found;
441: Value* _default;
442: public:
443: Switch_data(Request& ar, Value& asearching):
1.181 misha 444: r(ar)
445: {
446: if(asearching.is_string() || asearching.is_void()){
447: searching_string=&asearching.as_string();
448: searching_double=0;
449: } else {
450: searching_string=0;
451: searching_double=asearching.as_double();
452: }
453: }
1.28 parser 454: };
1.41 parser 455: #endif
1.129 paf 456: static void _switch(Request& r, MethodParams& params) {
457: Switch_data* data=new Switch_data(r, r.process_to_value(params[0]));
1.135 paf 458: Temp_hash_value<const String::Body, void*>
1.129 paf 459: switch_data_setter(r.classes_conf, switch_data_name, data);
1.28 parser 460:
1.129 paf 461: Value& cases_code=params.as_junction(1, "switch cases must be code");
1.82 paf 462: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
463: // because of stacked WWrapper used there as wcontext
1.84 paf 464: r.process(cases_code, true/*intercept_string*/);
1.147 paf 465: if(Value* selected_code=data->found? data->found: data->_default)
1.107 paf 466: r.write_pass_lang(r.process(*selected_code));
1.28 parser 467: }
468:
1.129 paf 469: static void _case(Request& r, MethodParams& params) {
470: Switch_data* data=static_cast<Switch_data*>(r.classes_conf.get(switch_data_name));
1.38 parser 471: if(!data)
1.166 misha 472: throw Exception(PARSER_RUNTIME,
1.129 paf 473: 0,
1.38 parser 474: "without switch");
1.28 parser 475:
1.181 misha 476: if(data->found) // matches already was found
477: return;
478:
1.129 paf 479: int count=params.count();
1.184 misha 480: Value* code=¶ms.as_expression(--count, "case result must be code");
481:
482: #ifdef USE_DESTRUCTORS
483: Junction *j=code->get_junction();
484: if (j){
485: code=new VJunction(j->self,j->method,j->method_frame,j->rcontext,j->wcontext,j->code);
486: if (j->wcontext) j->wcontext->attach_junction((VJunction *)code);
487: }
488: #endif
1.83 paf 489:
1.181 misha 490: for(int i=0; i<count; i++){
1.129 paf 491: Value& value=r.process_to_value(params[i]);
1.28 parser 492:
1.181 misha 493: if(value.is_string() && value.as_string() == CASE_DEFAULT_VALUE){
1.184 misha 494: data->_default=code;
1.181 misha 495: continue;
1.28 parser 496: }
497:
498: bool matches;
1.181 misha 499: if(data->searching_string)
500: matches=(*data->searching_string) == value.as_string();
1.28 parser 501: else
1.181 misha 502: matches=data->searching_double == value.as_double();
1.82 paf 503:
1.181 misha 504: if(matches){
1.184 misha 505: data->found=code;
1.28 parser 506: break;
507: }
508: }
509: }
1.136 paf 510: #ifndef DOXYGEN
511: struct Try_catch_result {
512: StringOrValue processed_code;
513: const String* exception_should_be_handled;
514:
515: Try_catch_result(): exception_should_be_handled(0) {}
516: };
517: #endif
518:
519: /// used by ^try and ^cache, @returns $exception.handled[string] if any
520: template<class I>
521: static Try_catch_result try_catch(Request& r,
522: StringOrValue body_code(Request&, I), I info,
1.179 misha 523: Value* catch_code,
524: bool could_be_handled_by_caller=false)
1.136 paf 525: {
526: Try_catch_result result;
1.179 misha 527:
1.136 paf 528: if(!catch_code) {
529: result.processed_code=body_code(r, info);
530: return result;
531: }
532:
533: // taking snapshot of try-context
534: Request_context_saver try_context(r);
535: try {
536: result.processed_code=body_code(r, info);
537: } catch(const Exception& e) {
538: Request_context_saver throw_context(r); // taking snapshot of throw-context [stack trace contains error]
539: Request::Exception_details details=r.get_details(e);
540: try_context.restore(); // restoring try-context to perform catch-code
541:
542: Junction* junction=catch_code->get_junction();
543: Value* method_frame=junction->method_frame;
544: Value* saved_exception_var_value=method_frame->get_element(exception_var_name, *method_frame, false);
1.154 paf 545: VMethodFrame& frame=*junction->method_frame;
546: frame.put_element(frame, exception_var_name, &details.vhash, false);
1.179 misha 547:
1.136 paf 548: result.processed_code=r.process(*catch_code);
549:
550: // retriving $exception.handled, restoring $exception var
551: Value* vhandled=details.vhash.hash().get(exception_handled_part_name);
1.154 paf 552: frame.put_element(frame, exception_var_name, saved_exception_var_value, false);
1.136 paf 553:
554: bool bhandled=false;
555: if(vhandled) {
556: if(vhandled->is_string()) { // not simple $exception.handled(1/0)?
1.160 paf 557: if(could_be_handled_by_caller) { // and we can possibly handle it
558: result.exception_should_be_handled=vhandled->get_string(); // considering 'recovered' and let the caller recover
559: return result;
560: }
561:
562: bhandled=false;
563: } else
1.179 misha 564: bhandled=vhandled->as_bool();
1.136 paf 565: }
566:
567: if(!bhandled) {
568: throw_context.restore(); // restoring throw-context [exception were not handled]
569: rethrow;
570: }
571: }
1.179 misha 572:
1.136 paf 573: return result;
574: }
1.28 parser 575:
1.63 paf 576: // cache--
577:
578: // consts
579:
1.152 paf 580: const int DATA_STRING_SERIALIZED_VERSION=0x0006;
1.63 paf 581:
582: // helper types
583:
584: #ifndef DOXYGEN
585: struct Data_string_serialized_prolog {
586: int version;
1.79 paf 587: time_t expires;
1.63 paf 588: };
589: #endif
590:
1.68 paf 591: void cache_delete(const String& file_spec) {
1.167 misha 592: file_delete(file_spec, false/*fail_on_problem*/);
1.63 paf 593: }
1.69 paf 594:
595: #ifndef DOXYGEN
1.135 paf 596: struct Cache_scope {
1.129 paf 597: public:
1.79 paf 598: time_t expires;
1.135 paf 599: const String* body_from_disk;
1.79 paf 600: };
1.69 paf 601: struct Locked_process_and_cache_put_action_info {
602: Request *r;
1.136 paf 603: Cache_scope *scope;
1.167 misha 604: Value* body_code;
605: Value* catch_code;
1.136 paf 606: const String* processed_code;
1.69 paf 607: };
608: #endif
1.136 paf 609:
610:
611:
612: static StringOrValue process_cache_body_code(Request& r, Value* body_code) {
1.153 paf 613: return StringOrValue(r.process_to_string(*body_code));
1.136 paf 614: }
615:
1.129 paf 616: /* @todo maybe network order worth spending some effort?
617: don't bothering myself with network byte order,
618: am not planning to be able to move resulting file across platforms
619: */
1.69 paf 620: static void locked_process_and_cache_put_action(int f, void *context) {
621: Locked_process_and_cache_put_action_info& info=
622: *static_cast<Locked_process_and_cache_put_action_info *>(context);
1.129 paf 623:
1.160 paf 624: const String* body_from_disk=info.scope->body_from_disk;
1.69 paf 625: // body->process
1.136 paf 626: Try_catch_result result=try_catch(*info.r,
627: process_cache_body_code, info.body_code,
1.160 paf 628: info.catch_code, body_from_disk!=0 /*we have something old=we can handle=recover later*/);
1.136 paf 629:
630: if(result.exception_should_be_handled) {
631: if(*result.exception_should_be_handled==CACHE_EXCEPTION_HANDLED_CACHE_NAME) {
1.160 paf 632: assert(body_from_disk);
633: info.processed_code=body_from_disk;
1.136 paf 634: } else
1.166 misha 635: throw Exception(PARSER_RUNTIME,
1.136 paf 636: result.exception_should_be_handled,
637: "$"EXCEPTION_VAR_NAME"."EXCEPTION_HANDLED_PART_NAME" value must be "
638: "either boolean or string '"CACHE_EXCEPTION_HANDLED_CACHE_NAME"'");
639: } else
640: info.processed_code=&result.processed_code.as_string();
1.69 paf 641:
1.79 paf 642: // expiration time not spoiled by ^cache(0) or something?
1.136 paf 643: if(info.scope->expires > time(0)) {
1.79 paf 644: // string -serialize> buffer
1.136 paf 645: String::Cm serialized=info.processed_code->serialize(
1.129 paf 646: sizeof(Data_string_serialized_prolog));
1.79 paf 647: Data_string_serialized_prolog& prolog=
1.129 paf 648: *reinterpret_cast<Data_string_serialized_prolog *>(serialized.str);
1.79 paf 649: prolog.version=DATA_STRING_SERIALIZED_VERSION;
1.136 paf 650: prolog.expires=info.scope->expires;
1.79 paf 651:
652: // buffer -write> file
1.129 paf 653: write(f, serialized.str, serialized.length);
1.79 paf 654: } else // expired!
1.136 paf 655: info.scope->expires=0; // flag it so that could be easily checked by caller
1.69 paf 656: }
1.129 paf 657: const String* locked_process_and_cache_put(Request& r,
1.128 paf 658: Value& body_code,
1.136 paf 659: Value* catch_code,
660: Cache_scope& scope,
661: const String& file_spec)
662: {
1.140 paf 663: Locked_process_and_cache_put_action_info info={&r, &scope, &body_code, catch_code, 0};
1.69 paf 664:
1.129 paf 665: const String* result=file_write_action_under_lock(
1.69 paf 666: file_spec,
1.168 misha 667: "cache_put",
668: locked_process_and_cache_put_action,
669: &info,
1.69 paf 670: false/*as_text*/,
671: false/*do_append*/,
1.173 misha 672: false/*block == don't wait till other thread release lock*/,
673: false/*dun throw exception if lock failed*/) ? info.processed_code: 0;
1.168 misha 674:
1.100 paf 675: time_t now=time(0);
1.136 paf 676: if(scope.expires<=now)
1.79 paf 677: cache_delete(file_spec);
678: return result;
1.63 paf 679: }
1.137 paf 680: #ifndef DOXYGEN
1.135 paf 681: struct Cache_get_result {
682: const String* body;
683: bool expired;
1.137 paf 684: };
685: #endif
686: static Cache_get_result cache_get(Request_charsets& charsets, const String& file_spec, time_t now) {
1.140 paf 687: Cache_get_result result={0, false};
1.135 paf 688:
1.129 paf 689: File_read_result file=file_read(charsets, file_spec,
1.63 paf 690: false/*as_text*/,
1.129 paf 691: 0, //no params
692: false/*fail_on_read_problem*/);
693: if(file.success && file.length/* ignore reads which are empty due to
1.72 paf 694: non-unary open+lockEX conflict with lockSH */) {
1.129 paf 695:
1.72 paf 696: Data_string_serialized_prolog& prolog=
1.129 paf 697: *reinterpret_cast<Data_string_serialized_prolog *>(file.str);
1.63 paf 698:
1.135 paf 699: String* body=new String;
1.72 paf 700: if(
1.129 paf 701: file.length>=sizeof(Data_string_serialized_prolog)
1.135 paf 702: && prolog.version==DATA_STRING_SERIALIZED_VERSION) {
703: if(body->deserialize(sizeof(Data_string_serialized_prolog), file.str, file.length)) {
704: result.body=body;
705: result.expired=prolog.expires <= now;
706: }
707: }
1.72 paf 708: }
1.63 paf 709:
1.135 paf 710: return result;
1.63 paf 711: }
1.129 paf 712: static time_t as_expires(Request& r, MethodParams& params,
1.79 paf 713: int index, time_t now) {
714: time_t result;
1.129 paf 715: if(Value* vdate=params[index].as(VDATE_TYPE, false))
716: result=static_cast<VDate*>(vdate)->get_time();
1.79 paf 717: else
1.129 paf 718: result=now+(time_t)params.as_double(index, "lifespan must be date or number", r);
1.79 paf 719:
720: return result;
721: }
1.129 paf 722: static const String& as_file_spec(Request& r, MethodParams& params, int index) {
723: return r.absolute(params.as_string(index, "filespec must be string"));
1.79 paf 724: }
1.129 paf 725: static void _cache(Request& r, MethodParams& params) {
1.173 misha 726: if(params.count()==0) {
727: // ^cache[] -- return current expiration time
1.158 paf 728: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
729: if(!scope)
1.166 misha 730: throw Exception(PARSER_RUNTIME,
1.158 paf 731: 0,
732: "expire-time get without cache");
733: r.write_no_lang(*new VDate(scope->expires));
734: return;
735: }
736:
1.79 paf 737: time_t now=time(0);
738:
1.129 paf 739: if(params.count()==1) {
1.173 misha 740: // ^cache[filename] ^cache(seconds) ^cache[expires date]
1.129 paf 741: if(params[0].is_string()) { // filename?
1.79 paf 742: cache_delete(as_file_spec(r, params, 0));
743: return;
744: }
745:
746: // secods|expires date
1.135 paf 747: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
748: if(!scope)
1.166 misha 749: throw Exception(PARSER_RUNTIME,
1.129 paf 750: 0,
1.79 paf 751: "expire-time reducing instruction without cache");
752:
1.129 paf 753: time_t expires=as_expires(r, params, 0, now);
1.135 paf 754: if(expires < scope->expires)
755: scope->expires=expires;
1.79 paf 756:
757: return;
1.149 paf 758: } else if(params.count()<3)
1.166 misha 759: throw Exception(PARSER_RUNTIME,
1.149 paf 760: 0,
761: "invalid number of parameters");
1.63 paf 762:
763: // file_spec, expires, body code
1.172 misha 764: const String& file_spec=as_file_spec(r, params, 0);
1.65 paf 765:
1.141 paf 766: Cache_scope scope={as_expires(r, params, 1, now), 0};
1.135 paf 767:
768: Temp_hash_value<const String::Body, void*>
769: cache_scope_setter(r.classes_conf, cache_data_name, &scope);
1.136 paf 770: Value& body_code=params.as_junction(2, "body_code must be code");
771: Value* catch_code=0;
772: if(params.count()>3)
773: catch_code=¶ms.as_junction(3, "catch_code must be code");
1.63 paf 774:
1.168 misha 775: if(scope.expires>now) {
776: Cache_get_result cached=cache_get(r.charsets, file_spec, now);
1.69 paf 777:
1.168 misha 778: if(cached.body) { // have cached copy
1.174 misha 779: if(cached.expired) {
780: scope.body_from_disk=cached.body; // storing for user to retrive it with ^cache[]
781: } else {
782: // and it's not expired yet write it out
1.168 misha 783: r.write_assign_lang(*cached.body);
784: // happy with it
785: return;
786: }
787: }
788:
789: // no cached info or it's already expired
1.173 misha 790:
791: // trying to process it under lock and store result in file
1.174 misha 792: const String* processed_body=locked_process_and_cache_put(r, body_code, catch_code, scope, file_spec);
1.173 misha 793: if(processed_body){
1.174 misha 794: // write it out
795: r.write_assign_lang(*processed_body);
796: // happy with it
797: return;
1.173 misha 798: } else {
799: // we fail while get exclusive lock. nvm, we just execute body_code a bit later
1.174 misha 800: }
1.69 paf 801: } else {
1.79 paf 802: // instructed not to cache; forget cached copy
1.68 paf 803: cache_delete(file_spec);
1.69 paf 804: }
1.168 misha 805:
806: // process without cacheing
807: const String& processed_body=r.process_to_string(body_code);
808: // write it out
809: r.write_assign_lang(processed_body);
1.63 paf 810: }
811:
1.136 paf 812: static StringOrValue process_try_body_code(Request& r, Value* body_code) {
813: return r.process(*body_code);
814: }
1.129 paf 815: static void _try_operator(Request& r, MethodParams& params) {
816: Value& body_code=params.as_junction(0, "body_code must be code");
817: Value& catch_code=params.as_junction(1, "catch_code must be code");
1.179 misha 818: Value* finally_code=(params.count()==3) ? ¶ms.as_junction(2, "finally_code must be code") : 0;
819:
820: Try_catch_result result;
821: StringOrValue finally_result;
822: try{
823: result=try_catch(r,
824: process_try_body_code, &body_code,
825: &catch_code);
826: if(result.exception_should_be_handled)
827: throw Exception(PARSER_RUNTIME,
828: result.exception_should_be_handled,
829: "catch block must set $exception.handled to some boolean value, not string");
830: } catch(...){
831: if(finally_code)
832: finally_result=r.process(*finally_code);
833: rethrow;
834: }
1.74 paf 835:
1.179 misha 836: if(finally_code)
837: finally_result=r.process(*finally_code);
1.123 paf 838:
1.136 paf 839: // write out processed body_code or catch_code
840: r.write_pass_lang(result.processed_code);
1.179 misha 841:
842: // write out processed finally code
843: if(finally_code)
844: r.write_pass_lang(finally_result);
1.74 paf 845: }
846:
1.138 paf 847: static void _throw_operator(Request&, MethodParams& params) {
1.178 misha 848: if(params.count()==1 && !params[0].is_string()) {
1.129 paf 849: if(HashStringValue *hash=params[0].get_hash()) {
850: const char* type=0;
851: if(Value* value=hash->get(exception_type_part_name))
1.78 paf 852: type=value->as_string().cstr();
1.129 paf 853: const String* source=0;
854: if(Value* value=hash->get(exception_source_part_name))
1.74 paf 855: source=&value->as_string();
1.138 paf 856: const char* comment=0;
1.129 paf 857: if(Value* value=hash->get(exception_comment_part_name))
1.74 paf 858: comment=value->as_string().cstr();
859:
1.78 paf 860: throw Exception(type,
1.129 paf 861: source?source:0,
862: "%s", comment?comment:"");
1.74 paf 863: } else
1.166 misha 864: throw Exception(PARSER_RUNTIME,
1.129 paf 865: 0,
1.178 misha 866: "one-param version has hash or string param");
1.74 paf 867: } else {
1.129 paf 868: const char* type=params.as_string(0, "type must be string").cstr();
1.178 misha 869: const String* source=params.count()>1? ¶ms.as_string(1, "source must be string"):0;
870: const char* comment=params.count()>2? params.as_string(2, "comment must be string").cstr():0;
871: throw Exception(type, source, "%s", comment?comment:"");
1.74 paf 872: }
1.132 paf 873: }
1.129 paf 874:
1.150 paf 875: static void _sleep_operator(Request& r, MethodParams& params) {
876: double seconds=params.as_double(0, "seconds must be double", r);
1.151 paf 877: pa_sleep((int)trunc(seconds), (int)trunc(seconds*1000));
1.150 paf 878: }
879:
1.129 paf 880: #if defined(WIN32) && defined(_DEBUG)
881: # define PA_BPT
1.138 paf 882: static void _bpt(Request&, MethodParams&) {
1.129 paf 883: _asm int 3;
884: }
885: #endif
886:
1.10 paf 887: // constructor
888:
1.129 paf 889: VClassMAIN::VClassMAIN(): VClass() {
890: set_name(*new String(MAIN_CLASS_NAME));
891:
892: #ifdef PA_BPT
893: // ^bpt[]
894: add_native_method("bpt", Method::CT_ANY, _bpt, 0, 0);
895: #endif
1.121 paf 896:
1.1 paf 897: // ^if(condition){code-when-true}
898: // ^if(condition){code-when-true}{code-when-false}
1.185 misha 899: add_native_method("if", Method::CT_ANY, _if, 2, 3, Method::CO_WITHOUT_FRAME);
1.1 paf 900:
1.185 misha 901: // ^untaint[as-is|uri|sql|js|html|html-typo|regex]{code}
902: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2, Method::CO_NONE);
1.1 paf 903:
1.185 misha 904: // ^taint[as-is|uri|sql|js|html|html-typo|regex]{code}
905: add_native_method("taint", Method::CT_ANY, _taint, 1, 2, Method::CO_NONE);
1.1 paf 906:
907: // ^process[code]
1.146 paf 908: add_native_method("process", Method::CT_ANY, _process, 1, 3);
1.1 paf 909:
910: // ^rem{code}
1.185 misha 911: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 912:
913: // ^while(condition){code}
1.185 misha 914: add_native_method("while", Method::CT_ANY, _while, 2, 3, Method::CO_WITHOUT_FRAME);
1.1 paf 915:
916: // ^use[file]
1.10 paf 917: add_native_method("use", Method::CT_ANY, _use, 1, 1);
1.1 paf 918:
1.164 paf 919: // ^break[]
1.185 misha 920: add_native_method("break", Method::CT_ANY, _break, 0, 0, Method::CO_WITHOUT_FRAME);
921:
1.164 paf 922: // ^continue[]
1.185 misha 923: add_native_method("continue", Method::CT_ANY, _continue, 0, 0, Method::CO_WITHOUT_FRAME);
924:
1.54 paf 925: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.185 misha 926: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1, Method::CO_WITHOUT_WCONTEXT);
1.1 paf 927:
928: // ^eval(expr)
929: // ^eval(expr)[format]
1.185 misha 930: add_native_method("eval", Method::CT_ANY, _eval, 1, 2, Method::CO_WITHOUT_FRAME);
1.52 parser 931:
1.1 paf 932: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 933: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
934:
1.63 paf 935:
1.136 paf 936: // ^cache[file_spec](time){code}[{catch code}] time=0 no cache
1.65 paf 937: // ^cache[file_spec] delete cache
1.161 paf 938: // ^cache[] get current expiration time
939: add_native_method("cache", Method::CT_ANY, _cache, 0, 4);
1.63 paf 940:
1.28 parser 941: // switch
942:
943: // ^switch[value]{cases}
1.185 misha 944: add_native_method("switch", Method::CT_ANY, _switch, 2, 2, Method::CO_WITHOUT_FRAME);
1.28 parser 945:
946: // ^case[value]{code}
1.185 misha 947: add_native_method("case", Method::CT_ANY, _case, 2, 10000, Method::CO_WITHOUT_FRAME);
1.74 paf 948:
949: // try-catch
950:
951: // ^try{code}{catch code}
1.185 misha 952: add_native_method("try", Method::CT_ANY, _try_operator, 2, 3, Method::CO_WITHOUT_FRAME);
1.74 paf 953: // ^throw[$exception hash]
954: // ^throw[type;source;comment]
955: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
956:
1.150 paf 957: add_native_method("sleep", Method::CT_ANY, _sleep_operator, 1, 1);
1.10 paf 958: }
1.11 paf 959:
960: // constructor & configurator
1.1 paf 961:
1.129 paf 962: VStateless_class& VClassMAIN_create() {
963: return *new VClassMAIN;
1.1 paf 964: }
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