Annotation of parser3/src/classes/op.C, revision 1.201
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:
1.201 ! misha 8: static const char * const IDENT_OP_C="$Date: 2010-06-16 11:29:17 $";
1.1 paf 9:
1.13 paf 10: #include "classes.h"
1.129 paf 11: #include "pa_vmethod_frame.h"
12:
1.1 paf 13: #include "pa_common.h"
1.134 paf 14: #include "pa_os.h"
1.1 paf 15: #include "pa_request.h"
16: #include "pa_vint.h"
17: #include "pa_sql_connection.h"
1.79 paf 18: #include "pa_vdate.h"
1.105 paf 19: #include "pa_vmethod_frame.h"
1.129 paf 20: #include "pa_vclass.h"
1.144 paf 21: #include "pa_charset.h"
1.1 paf 22:
1.18 parser 23: // limits
24:
1.162 paf 25: #define MAX_LOOPS 20000
1.18 parser 26:
1.10 paf 27: // defines
28:
1.82 paf 29: #define CASE_DEFAULT_VALUE "DEFAULT"
1.146 paf 30: #define PROCESS_MAIN_OPTION_NAME "main"
31: #define PROCESS_FILE_OPTION_NAME "file"
32: #define PROCESS_LINENO_OPTION_NAME "lineno"
1.11 paf 33:
1.10 paf 34: // class
35:
1.113 paf 36: class VClassMAIN: public VClass {
1.10 paf 37: public:
1.129 paf 38: VClassMAIN();
1.10 paf 39: };
40:
1.129 paf 41: // defines for statics
42:
43: #define SWITCH_DATA_NAME "SWITCH-DATA"
44: #define CACHE_DATA_NAME "CACHE-DATA"
1.164 paf 45:
1.129 paf 46: #define EXCEPTION_VAR_NAME "exception"
47:
48: // statics
49:
50: //^switch ^case
51: static const String switch_data_name(SWITCH_DATA_NAME);
52: //^cache
53: static const String cache_data_name(CACHE_DATA_NAME);
54:
55: static const String exception_var_name(EXCEPTION_VAR_NAME);
56:
1.164 paf 57:
1.136 paf 58: // local defines
59:
60: #define CACHE_EXCEPTION_HANDLED_CACHE_NAME "cache"
61:
1.129 paf 62: // helpers
63:
1.187 misha 64: class Untaint_lang_name2enum: public HashString<String::Language> {
1.129 paf 65: public:
66: Untaint_lang_name2enum() {
67: #define ULN(name, LANG) \
1.130 paf 68: put(String::Body(name), (value_type)(String::L_##LANG));
1.198 misha 69: ULN("clean", CLEAN);
1.129 paf 70: ULN("as-is", AS_IS);
71: ULN("optimized-as-is", AS_IS|String::L_OPTIMIZE_BIT);
72: ULN("file-spec", FILE_SPEC);
73: ULN("http-header", HTTP_HEADER);
74: ULN("mail-header", MAIL_HEADER);
75: ULN("uri", URI);
76: ULN("sql", SQL);
77: ULN("js", JS);
78: ULN("xml", XML);
79: ULN("optimized-xml", XML|String::L_OPTIMIZE_BIT);
80: ULN("html", HTML);
81: ULN("optimized-html", HTML|String::L_OPTIMIZE_BIT);
1.159 paf 82: ULN("regex", REGEX);
1.193 misha 83: ULN("parser-code", PARSER_CODE);
1.129 paf 84: #undef ULN
85: }
86: } untaint_lang_name2enum;
87:
1.10 paf 88: // methods
89:
1.129 paf 90: static void _if(Request& r, MethodParams& params) {
1.200 moko 91: size_t max_param=params.count()-1;
92: size_t i=0;
93: do {
94: bool condition=params.as_bool(i, "condition must be expression", r);
95: if(condition) {
96: r.process_write(*params.get(i+1));
97: return;
98: }
99: i+=2;
100: } while (i < max_param);
101:
102: if(i == max_param)
103: r.process_write(*params.get(i));
1.1 paf 104: }
105:
1.175 misha 106: static String::Language get_untaint_lang(MethodParams& params, int index){
107: const String& lang_name=params.as_string(index, "lang must be string");
108: String::Language lang=untaint_lang_name2enum.get(lang_name);
109: if(!lang)
1.183 misha 110: throw Exception(PARSER_RUNTIME,
1.175 misha 111: &lang_name,
112: "invalid taint language");
113: return lang;
114: }
115:
1.129 paf 116: static void _untaint(Request& r, MethodParams& params) {
117: String::Language lang;
118: if(params.count()==1)
1.175 misha 119: lang=String::L_AS_IS; // mark as simply 'as-is'. useful in html from sql
120: else
121: lang=get_untaint_lang(params, 0);
1.1 paf 122:
123: {
1.129 paf 124: Value& vbody=params.as_junction(params.count()-1, "body must be code");
1.1 paf 125:
1.191 misha 126: Temp_lang temp_lang(r, lang); // set temporarily specified ^untaint[language;
127: StringOrValue result=r.process(vbody); // process marking tainted with that lang
1.188 misha 128: r.write_assign_lang(result);
1.1 paf 129: }
130: }
131:
1.129 paf 132: static void _taint(Request& r, MethodParams& params) {
133: String::Language lang;
134: if(params.count()==1)
1.175 misha 135: lang=String::L_TAINTED; // mark as simply 'tainted'. useful in table:create
136: else
137: lang=get_untaint_lang(params, 0);
1.1 paf 138:
139: {
1.129 paf 140: Value& vbody=params.as_no_junction(params.count()-1, "body must not be code");
1.1 paf 141:
1.191 misha 142: String result(vbody.as_string(), lang); // force result language to specified
1.188 misha 143: r.write_assign_lang(result);
1.1 paf 144: }
145: }
146:
1.129 paf 147: static void _process(Request& r, MethodParams& params) {
148: Method* main_method;
149:
150: size_t index=0;
151: Value* target_self;
152: Value& maybe_target_self=params[index];
153: if(maybe_target_self.get_string() || maybe_target_self.get_junction())
154: target_self=&r.get_method_frame()->caller()->self();
155: else {
156: target_self=&maybe_target_self; index++;
157: }
158:
1.1 paf 159: {
1.197 misha 160: VStateless_class *target_class=target_self->get_class();
1.116 paf 161: if(!target_class)
1.166 misha 162: throw Exception(PARSER_RUNTIME,
1.129 paf 163: 0,
1.116 paf 164: "no target class");
1.114 paf 165:
1.73 paf 166: // temporary remove language change
1.192 misha 167: Temp_lang temp_lang(r, String::L_PARSER_CODE);
1.1 paf 168: // temporary zero @main so to maybe-replace it in processed code
1.129 paf 169: Temp_method temp_method_main(*target_class, main_method_name, 0);
1.1 paf 170: // temporary zero @auto so it wouldn't be auto-called in Request::use_buf
1.129 paf 171: Temp_method temp_method_auto(*target_class, auto_method_name, 0);
172:
1.146 paf 173: size_t options_index=index+1;
174: HashStringValue* options=0;
175: if(options_index<params.count()) {
1.195 misha 176: Value& voptions=params.as_no_junction(options_index, OPTIONS_MUST_NOT_BE_CODE);
1.146 paf 177: options=voptions.get_hash();
178: if(!options)
1.201 ! misha 179: throw Exception(PARSER_RUNTIME, 0, OPTIONS_MUST_BE_HASH);
1.146 paf 180: }
181:
1.129 paf 182: const String* main_alias=0;
1.146 paf 183: const String* file_alias=0;
184: int line_no_alias_offset=0;
185: if(options) {
186: int valid_options=0;
187: if(Value* vmain_alias=options->get(PROCESS_MAIN_OPTION_NAME)) {
188: valid_options++;
189: main_alias=&vmain_alias->as_string();
190: }
191: if(Value* vfile_alias=options->get(PROCESS_FILE_OPTION_NAME)) {
192: valid_options++;
193: file_alias=&vfile_alias->as_string();
194: }
195: if(Value* vline_no_alias_offset=options->get(PROCESS_LINENO_OPTION_NAME)) {
196: valid_options++;
197: line_no_alias_offset=vline_no_alias_offset->as_int();
198: }
199:
200: if(valid_options!=options->count())
1.201 ! misha 201: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
1.146 paf 202: }
1.129 paf 203:
1.146 paf 204: uint processe_file_no=file_alias?
205: r.register_file(r.absolute(*file_alias))
206: : pseudo_file_no__process;
207: // process...{string}
208: Value& vjunction=params.as_junction(index, "body must be code");
209: // evaluate source to process
210: const String& source=r.process_to_string(vjunction);
211: r.use_buf(*target_class,
1.190 misha 212: source.untaint_cstr(String::L_AS_IS, r.connection(false)),
1.146 paf 213: main_alias,
214: processe_file_no,
215: line_no_alias_offset);
1.1 paf 216:
1.73 paf 217: // main_method
1.129 paf 218: main_method=target_class->get_method(main_method_name);
1.73 paf 219: }
220: // after restoring current-request-lang
221: // maybe-execute @main[]
222: if(main_method) {
1.119 paf 223: // temporarily set method_frame's self to target_self
1.129 paf 224: Temp_method_frame_self tmfs(*r.get_method_frame(), *target_self);
1.73 paf 225: // execute!
226: r.execute(*main_method->parser_code);
1.1 paf 227: }
228: }
229:
1.138 paf 230: static void _rem(Request&, MethodParams& params) {
1.129 paf 231: params.as_junction(0, "body must be code");
1.1 paf 232: }
233:
1.129 paf 234: static void _while(Request& r, MethodParams& params) {
1.196 misha 235: InCycle temp(r);
1.164 paf 236:
1.170 misha 237: Value& vcondition=params.as_expression(0, "condition must be number, bool or expression");
238:
1.162 paf 239: Value& body_code=params.as_junction(1, "body must be code");
240: Value* delim_maybe_code=params.count()>2?¶ms[2]:0;
1.1 paf 241:
242: // while...
243: int endless_loop_count=0;
1.186 misha 244: if(delim_maybe_code){ // delimiter set
1.185 misha 245: bool need_delim=false;
246: while(true) {
247: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
248: throw Exception(PARSER_RUNTIME,
249: 0,
250: "endless loop detected");
251:
252: if(!r.process_to_value(vcondition, false/*don't intercept string*/).as_bool())
253: break;
1.1 paf 254:
1.185 misha 255: StringOrValue sv_processed=r.process(body_code);
256: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 misha 257:
1.185 misha 258: const String* s_processed=sv_processed.get_string();
1.186 misha 259: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 260: if(need_delim) // need delim & iteration produced string?
261: r.write_pass_lang(r.process(*delim_maybe_code));
262: else
263: need_delim=true;
264: }
265: r.write_pass_lang(sv_processed);
1.1 paf 266:
1.185 misha 267: if(lskip==Request::SKIP_BREAK)
268: break;
1.162 paf 269: }
1.185 misha 270: } else {
271: while(true) {
272: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
273: throw Exception(PARSER_RUNTIME,
274: 0,
275: "endless loop detected");
276:
277: if(!r.process_to_value(vcondition, false/*don't intercept string*/).as_bool())
278: break;
1.164 paf 279:
1.185 misha 280: r.process_write(body_code);
281: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
282:
283: if(lskip==Request::SKIP_BREAK)
284: break;
285: }
1.1 paf 286: }
287: }
288:
1.129 paf 289: static void _use(Request& r, MethodParams& params) {
1.171 misha 290: Value& vfile=params.as_no_junction(0, FILE_NAME_MUST_NOT_BE_CODE);
1.199 misha 291:
292: // _use could be called from the parser3 method only, so caller is always defined
293: r.use_file(r.main_class, vfile.as_string(), r.get_method_filename(r.get_method_frame()->caller()->junction.method));
1.1 paf 294: }
295:
1.164 paf 296: static void set_skip(Request& r, Request::Skip askip) {
1.196 misha 297: if(!r.get_in_cycle())
1.166 misha 298: throw Exception(PARSER_RUNTIME,
1.164 paf 299: 0,
300: "without cycle");
301:
302: r.set_skip(askip);
303: }
304:
305: static void _break(Request& r, MethodParams&) {
306: set_skip(r, Request::SKIP_BREAK);
307: }
308:
309: static void _continue(Request& r, MethodParams&) {
310: set_skip(r, Request::SKIP_CONTINUE);
311: }
312:
1.129 paf 313: static void _for(Request& r, MethodParams& params) {
1.196 misha 314: InCycle temp(r);
1.164 paf 315:
1.129 paf 316: const String& var_name=params.as_string(0, "var name must be string");
317: int from=params.as_int(1, "from must be int", r);
318: int to=params.as_int(2, "to must be int", r);
1.186 misha 319: Value& body_code=params.as_junction(3, "body must be code");
1.129 paf 320: Value* delim_maybe_code=params.count()>4?¶ms[4]:0;
1.1 paf 321:
1.57 paf 322: if(to-from>=MAX_LOOPS) // too long loop?
1.166 misha 323: throw Exception(PARSER_RUNTIME,
1.129 paf 324: 0,
1.57 paf 325: "endless loop detected");
326:
1.129 paf 327: VInt* vint=new VInt(0);
1.154 paf 328:
329: VMethodFrame& caller=*r.get_method_frame()->caller();
1.197 misha 330: caller.put_element(var_name, vint, false);
1.186 misha 331: if(delim_maybe_code){ // delimiter set
1.185 misha 332: bool need_delim=false;
333:
334: for(int i=from; i<=to; i++) {
335: vint->set_int(i);
336:
337: StringOrValue sv_processed=r.process(body_code);
338: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 misha 339:
1.185 misha 340: const String* s_processed=sv_processed.get_string();
1.186 misha 341: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 342: if(need_delim) // need delim & iteration produced string?
343: r.write_pass_lang(r.process(*delim_maybe_code));
344: else
345: need_delim=true;
346: }
347: r.write_pass_lang(sv_processed);
1.1 paf 348:
1.185 misha 349: if(lskip==Request::SKIP_BREAK)
350: break;
1.1 paf 351: }
1.185 misha 352: } else {
353: for(int i=from; i<=to; i++) {
354: vint->set_int(i);
355:
356: r.process_write(body_code);
357: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.164 paf 358:
1.185 misha 359: if(lskip==Request::SKIP_BREAK)
360: break;
361: }
1.1 paf 362: }
363: }
364:
1.129 paf 365: static void _eval(Request& r, MethodParams& params) {
366: Value& expr=params.as_junction(0, "need expression");
1.1 paf 367: // evaluate expresion
1.129 paf 368: Value& value_result=r.process_to_value(expr,
1.165 misha 369: false/*don't intercept string*/).as_expr_result();
1.129 paf 370: if(params.count()>1) {
1.177 misha 371: const String& fmt=params.as_string(1, "fmt must be string").trim();
372: if(fmt.is_empty()){
373: r.write_no_lang(value_result);
374: } else {
375: r.write_no_lang(String(format(value_result.as_double(), fmt.cstrm())));
376: }
1.91 paf 377: } else
1.129 paf 378: r.write_no_lang(value_result);
1.1 paf 379: }
380:
1.129 paf 381: static void _connect(Request& r, MethodParams& params) {
1.63 paf 382: #ifdef RESOURCES_DEBUG
383: struct timeval mt[2];
384: #endif
1.129 paf 385: Value& url=params.as_no_junction(0, "url must not be code");
386: Value& body_code=params.as_junction(1, "body must be code");
1.1 paf 387:
1.129 paf 388: Table* protocol2driver_and_client=0;
1.197 misha 389: if(Value* sql=r.main_class.get_element(String(MAIN_SQL_NAME))) {
390: if(Value* element=sql->get_element(String(MAIN_SQL_DRIVERS_NAME))) {
1.113 paf 391: protocol2driver_and_client=element->get_table();
392: }
393: }
1.11 paf 394:
1.63 paf 395: #ifdef RESOURCES_DEBUG
396: //measure:before
397: gettimeofday(&mt[0],NULL);
398: #endif
1.1 paf 399: // connect
1.142 paf 400: SQL_Connection* connection=SQL_driver_manager->get_connection(url.as_string(),
1.144 paf 401: protocol2driver_and_client,
1.180 misha 402: r.charsets.source().NAME().cstr(),
403: r.request_info.document_root);
1.1 paf 404:
1.63 paf 405: #ifdef RESOURCES_DEBUG
406: //measure:after connect
407: gettimeofday(&mt[1],NULL);
408:
409: double t[2];
410: for(int i=0;i<2;i++)
411: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
412:
413: r.sql_connect_time+=t[1]-t[0];
414: #endif
1.129 paf 415: Temp_connection temp_connection(r, connection);
1.1 paf 416: // execute body
1.53 parser 417: try {
1.189 misha 418: r.process_write(body_code);
1.129 paf 419: connection->commit();
420: connection->close();
1.75 paf 421: } catch(...) { // process problem
1.129 paf 422: connection->rollback();
423: connection->close();
424: rethrow;
1.1 paf 425: }
426: }
427:
1.41 parser 428: #ifndef DOXYGEN
1.129 paf 429: class Switch_data: public PA_Object {
430: public:
431: Request& r;
1.181 misha 432: const String* searching_string;
433: double searching_double;
1.129 paf 434: Value* found;
435: Value* _default;
436: public:
437: Switch_data(Request& ar, Value& asearching):
1.181 misha 438: r(ar)
439: {
440: if(asearching.is_string() || asearching.is_void()){
441: searching_string=&asearching.as_string();
442: searching_double=0;
443: } else {
444: searching_string=0;
445: searching_double=asearching.as_double();
446: }
447: }
1.28 parser 448: };
1.41 parser 449: #endif
1.129 paf 450: static void _switch(Request& r, MethodParams& params) {
451: Switch_data* data=new Switch_data(r, r.process_to_value(params[0]));
1.135 paf 452: Temp_hash_value<const String::Body, void*>
1.129 paf 453: switch_data_setter(r.classes_conf, switch_data_name, data);
1.28 parser 454:
1.129 paf 455: Value& cases_code=params.as_junction(1, "switch cases must be code");
1.82 paf 456: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
457: // because of stacked WWrapper used there as wcontext
1.84 paf 458: r.process(cases_code, true/*intercept_string*/);
1.147 paf 459: if(Value* selected_code=data->found? data->found: data->_default)
1.107 paf 460: r.write_pass_lang(r.process(*selected_code));
1.28 parser 461: }
462:
1.129 paf 463: static void _case(Request& r, MethodParams& params) {
464: Switch_data* data=static_cast<Switch_data*>(r.classes_conf.get(switch_data_name));
1.38 parser 465: if(!data)
1.166 misha 466: throw Exception(PARSER_RUNTIME,
1.129 paf 467: 0,
1.38 parser 468: "without switch");
1.28 parser 469:
1.181 misha 470: if(data->found) // matches already was found
471: return;
472:
1.129 paf 473: int count=params.count();
1.184 misha 474: Value* code=¶ms.as_expression(--count, "case result must be code");
475:
476: #ifdef USE_DESTRUCTORS
477: Junction *j=code->get_junction();
478: if (j){
479: code=new VJunction(j->self,j->method,j->method_frame,j->rcontext,j->wcontext,j->code);
480: if (j->wcontext) j->wcontext->attach_junction((VJunction *)code);
481: }
482: #endif
1.83 paf 483:
1.181 misha 484: for(int i=0; i<count; i++){
1.129 paf 485: Value& value=r.process_to_value(params[i]);
1.28 parser 486:
1.181 misha 487: if(value.is_string() && value.as_string() == CASE_DEFAULT_VALUE){
1.184 misha 488: data->_default=code;
1.181 misha 489: continue;
1.28 parser 490: }
491:
492: bool matches;
1.181 misha 493: if(data->searching_string)
494: matches=(*data->searching_string) == value.as_string();
1.28 parser 495: else
1.181 misha 496: matches=data->searching_double == value.as_double();
1.82 paf 497:
1.181 misha 498: if(matches){
1.184 misha 499: data->found=code;
1.28 parser 500: break;
501: }
502: }
503: }
1.136 paf 504: #ifndef DOXYGEN
505: struct Try_catch_result {
506: StringOrValue processed_code;
507: const String* exception_should_be_handled;
508:
509: Try_catch_result(): exception_should_be_handled(0) {}
510: };
511: #endif
512:
513: /// used by ^try and ^cache, @returns $exception.handled[string] if any
514: template<class I>
515: static Try_catch_result try_catch(Request& r,
516: StringOrValue body_code(Request&, I), I info,
1.179 misha 517: Value* catch_code,
518: bool could_be_handled_by_caller=false)
1.136 paf 519: {
520: Try_catch_result result;
1.179 misha 521:
1.136 paf 522: if(!catch_code) {
523: result.processed_code=body_code(r, info);
524: return result;
525: }
526:
527: // taking snapshot of try-context
528: Request_context_saver try_context(r);
529: try {
530: result.processed_code=body_code(r, info);
531: } catch(const Exception& e) {
532: Request_context_saver throw_context(r); // taking snapshot of throw-context [stack trace contains error]
533: Request::Exception_details details=r.get_details(e);
534: try_context.restore(); // restoring try-context to perform catch-code
535:
536: Junction* junction=catch_code->get_junction();
537: Value* method_frame=junction->method_frame;
1.197 misha 538: Value* saved_exception_var_value=method_frame->get_element(exception_var_name);
1.154 paf 539: VMethodFrame& frame=*junction->method_frame;
1.197 misha 540: frame.put_element(exception_var_name, &details.vhash, false);
1.179 misha 541:
1.136 paf 542: result.processed_code=r.process(*catch_code);
543:
544: // retriving $exception.handled, restoring $exception var
545: Value* vhandled=details.vhash.hash().get(exception_handled_part_name);
1.197 misha 546: frame.put_element(exception_var_name, saved_exception_var_value, false);
1.136 paf 547:
548: bool bhandled=false;
549: if(vhandled) {
550: if(vhandled->is_string()) { // not simple $exception.handled(1/0)?
1.160 paf 551: if(could_be_handled_by_caller) { // and we can possibly handle it
552: result.exception_should_be_handled=vhandled->get_string(); // considering 'recovered' and let the caller recover
553: return result;
554: }
555:
556: bhandled=false;
557: } else
1.179 misha 558: bhandled=vhandled->as_bool();
1.136 paf 559: }
560:
561: if(!bhandled) {
562: throw_context.restore(); // restoring throw-context [exception were not handled]
563: rethrow;
564: }
565: }
1.179 misha 566:
1.136 paf 567: return result;
568: }
1.28 parser 569:
1.63 paf 570: // cache--
571:
572: // consts
573:
1.152 paf 574: const int DATA_STRING_SERIALIZED_VERSION=0x0006;
1.63 paf 575:
576: // helper types
577:
578: #ifndef DOXYGEN
579: struct Data_string_serialized_prolog {
580: int version;
1.79 paf 581: time_t expires;
1.63 paf 582: };
583: #endif
584:
1.68 paf 585: void cache_delete(const String& file_spec) {
1.167 misha 586: file_delete(file_spec, false/*fail_on_problem*/);
1.63 paf 587: }
1.69 paf 588:
589: #ifndef DOXYGEN
1.135 paf 590: struct Cache_scope {
1.129 paf 591: public:
1.79 paf 592: time_t expires;
1.135 paf 593: const String* body_from_disk;
1.79 paf 594: };
1.69 paf 595: struct Locked_process_and_cache_put_action_info {
596: Request *r;
1.136 paf 597: Cache_scope *scope;
1.167 misha 598: Value* body_code;
599: Value* catch_code;
1.136 paf 600: const String* processed_code;
1.69 paf 601: };
602: #endif
1.136 paf 603:
604:
605:
606: static StringOrValue process_cache_body_code(Request& r, Value* body_code) {
1.153 paf 607: return StringOrValue(r.process_to_string(*body_code));
1.136 paf 608: }
609:
1.129 paf 610: /* @todo maybe network order worth spending some effort?
611: don't bothering myself with network byte order,
612: am not planning to be able to move resulting file across platforms
613: */
1.69 paf 614: static void locked_process_and_cache_put_action(int f, void *context) {
615: Locked_process_and_cache_put_action_info& info=
616: *static_cast<Locked_process_and_cache_put_action_info *>(context);
1.129 paf 617:
1.160 paf 618: const String* body_from_disk=info.scope->body_from_disk;
1.69 paf 619: // body->process
1.136 paf 620: Try_catch_result result=try_catch(*info.r,
621: process_cache_body_code, info.body_code,
1.160 paf 622: info.catch_code, body_from_disk!=0 /*we have something old=we can handle=recover later*/);
1.136 paf 623:
624: if(result.exception_should_be_handled) {
625: if(*result.exception_should_be_handled==CACHE_EXCEPTION_HANDLED_CACHE_NAME) {
1.160 paf 626: assert(body_from_disk);
627: info.processed_code=body_from_disk;
1.136 paf 628: } else
1.166 misha 629: throw Exception(PARSER_RUNTIME,
1.136 paf 630: result.exception_should_be_handled,
631: "$"EXCEPTION_VAR_NAME"."EXCEPTION_HANDLED_PART_NAME" value must be "
632: "either boolean or string '"CACHE_EXCEPTION_HANDLED_CACHE_NAME"'");
633: } else
634: info.processed_code=&result.processed_code.as_string();
1.69 paf 635:
1.79 paf 636: // expiration time not spoiled by ^cache(0) or something?
1.136 paf 637: if(info.scope->expires > time(0)) {
1.79 paf 638: // string -serialize> buffer
1.136 paf 639: String::Cm serialized=info.processed_code->serialize(
1.129 paf 640: sizeof(Data_string_serialized_prolog));
1.79 paf 641: Data_string_serialized_prolog& prolog=
1.129 paf 642: *reinterpret_cast<Data_string_serialized_prolog *>(serialized.str);
1.79 paf 643: prolog.version=DATA_STRING_SERIALIZED_VERSION;
1.136 paf 644: prolog.expires=info.scope->expires;
1.79 paf 645:
646: // buffer -write> file
1.129 paf 647: write(f, serialized.str, serialized.length);
1.79 paf 648: } else // expired!
1.136 paf 649: info.scope->expires=0; // flag it so that could be easily checked by caller
1.69 paf 650: }
1.129 paf 651: const String* locked_process_and_cache_put(Request& r,
1.128 paf 652: Value& body_code,
1.136 paf 653: Value* catch_code,
654: Cache_scope& scope,
655: const String& file_spec)
656: {
1.140 paf 657: Locked_process_and_cache_put_action_info info={&r, &scope, &body_code, catch_code, 0};
1.69 paf 658:
1.129 paf 659: const String* result=file_write_action_under_lock(
1.69 paf 660: file_spec,
1.168 misha 661: "cache_put",
662: locked_process_and_cache_put_action,
663: &info,
1.69 paf 664: false/*as_text*/,
665: false/*do_append*/,
1.173 misha 666: false/*block == don't wait till other thread release lock*/,
667: false/*dun throw exception if lock failed*/) ? info.processed_code: 0;
1.168 misha 668:
1.100 paf 669: time_t now=time(0);
1.136 paf 670: if(scope.expires<=now)
1.79 paf 671: cache_delete(file_spec);
672: return result;
1.63 paf 673: }
1.137 paf 674: #ifndef DOXYGEN
1.135 paf 675: struct Cache_get_result {
676: const String* body;
677: bool expired;
1.137 paf 678: };
679: #endif
680: static Cache_get_result cache_get(Request_charsets& charsets, const String& file_spec, time_t now) {
1.140 paf 681: Cache_get_result result={0, false};
1.135 paf 682:
1.129 paf 683: File_read_result file=file_read(charsets, file_spec,
1.63 paf 684: false/*as_text*/,
1.129 paf 685: 0, //no params
686: false/*fail_on_read_problem*/);
687: if(file.success && file.length/* ignore reads which are empty due to
1.72 paf 688: non-unary open+lockEX conflict with lockSH */) {
1.129 paf 689:
1.72 paf 690: Data_string_serialized_prolog& prolog=
1.129 paf 691: *reinterpret_cast<Data_string_serialized_prolog *>(file.str);
1.63 paf 692:
1.135 paf 693: String* body=new String;
1.72 paf 694: if(
1.129 paf 695: file.length>=sizeof(Data_string_serialized_prolog)
1.135 paf 696: && prolog.version==DATA_STRING_SERIALIZED_VERSION) {
697: if(body->deserialize(sizeof(Data_string_serialized_prolog), file.str, file.length)) {
698: result.body=body;
699: result.expired=prolog.expires <= now;
700: }
701: }
1.72 paf 702: }
1.63 paf 703:
1.135 paf 704: return result;
1.63 paf 705: }
1.129 paf 706: static time_t as_expires(Request& r, MethodParams& params,
1.79 paf 707: int index, time_t now) {
708: time_t result;
1.197 misha 709: if(Value* vdate=params[index].as(VDATE_TYPE))
1.129 paf 710: result=static_cast<VDate*>(vdate)->get_time();
1.79 paf 711: else
1.129 paf 712: result=now+(time_t)params.as_double(index, "lifespan must be date or number", r);
1.79 paf 713:
714: return result;
715: }
1.129 paf 716: static const String& as_file_spec(Request& r, MethodParams& params, int index) {
717: return r.absolute(params.as_string(index, "filespec must be string"));
1.79 paf 718: }
1.129 paf 719: static void _cache(Request& r, MethodParams& params) {
1.173 misha 720: if(params.count()==0) {
721: // ^cache[] -- return current expiration time
1.158 paf 722: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
723: if(!scope)
1.166 misha 724: throw Exception(PARSER_RUNTIME,
1.158 paf 725: 0,
726: "expire-time get without cache");
727: r.write_no_lang(*new VDate(scope->expires));
728: return;
729: }
730:
1.79 paf 731: time_t now=time(0);
732:
1.129 paf 733: if(params.count()==1) {
1.173 misha 734: // ^cache[filename] ^cache(seconds) ^cache[expires date]
1.129 paf 735: if(params[0].is_string()) { // filename?
1.79 paf 736: cache_delete(as_file_spec(r, params, 0));
737: return;
738: }
739:
740: // secods|expires date
1.135 paf 741: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
742: if(!scope)
1.166 misha 743: throw Exception(PARSER_RUNTIME,
1.129 paf 744: 0,
1.79 paf 745: "expire-time reducing instruction without cache");
746:
1.129 paf 747: time_t expires=as_expires(r, params, 0, now);
1.135 paf 748: if(expires < scope->expires)
749: scope->expires=expires;
1.79 paf 750:
751: return;
1.149 paf 752: } else if(params.count()<3)
1.166 misha 753: throw Exception(PARSER_RUNTIME,
1.149 paf 754: 0,
755: "invalid number of parameters");
1.63 paf 756:
757: // file_spec, expires, body code
1.172 misha 758: const String& file_spec=as_file_spec(r, params, 0);
1.65 paf 759:
1.141 paf 760: Cache_scope scope={as_expires(r, params, 1, now), 0};
1.135 paf 761:
762: Temp_hash_value<const String::Body, void*>
763: cache_scope_setter(r.classes_conf, cache_data_name, &scope);
1.136 paf 764: Value& body_code=params.as_junction(2, "body_code must be code");
765: Value* catch_code=0;
766: if(params.count()>3)
767: catch_code=¶ms.as_junction(3, "catch_code must be code");
1.63 paf 768:
1.168 misha 769: if(scope.expires>now) {
770: Cache_get_result cached=cache_get(r.charsets, file_spec, now);
1.69 paf 771:
1.168 misha 772: if(cached.body) { // have cached copy
1.174 misha 773: if(cached.expired) {
774: scope.body_from_disk=cached.body; // storing for user to retrive it with ^cache[]
775: } else {
776: // and it's not expired yet write it out
1.168 misha 777: r.write_assign_lang(*cached.body);
778: // happy with it
779: return;
780: }
781: }
782:
783: // no cached info or it's already expired
1.173 misha 784:
785: // trying to process it under lock and store result in file
1.174 misha 786: const String* processed_body=locked_process_and_cache_put(r, body_code, catch_code, scope, file_spec);
1.173 misha 787: if(processed_body){
1.174 misha 788: // write it out
789: r.write_assign_lang(*processed_body);
790: // happy with it
791: return;
1.173 misha 792: } else {
793: // we fail while get exclusive lock. nvm, we just execute body_code a bit later
1.174 misha 794: }
1.69 paf 795: } else {
1.79 paf 796: // instructed not to cache; forget cached copy
1.68 paf 797: cache_delete(file_spec);
1.69 paf 798: }
1.168 misha 799:
800: // process without cacheing
801: const String& processed_body=r.process_to_string(body_code);
802: // write it out
803: r.write_assign_lang(processed_body);
1.63 paf 804: }
805:
1.136 paf 806: static StringOrValue process_try_body_code(Request& r, Value* body_code) {
807: return r.process(*body_code);
808: }
1.129 paf 809: static void _try_operator(Request& r, MethodParams& params) {
810: Value& body_code=params.as_junction(0, "body_code must be code");
811: Value& catch_code=params.as_junction(1, "catch_code must be code");
1.179 misha 812: Value* finally_code=(params.count()==3) ? ¶ms.as_junction(2, "finally_code must be code") : 0;
813:
814: Try_catch_result result;
815: StringOrValue finally_result;
816: try{
817: result=try_catch(r,
818: process_try_body_code, &body_code,
819: &catch_code);
820: if(result.exception_should_be_handled)
821: throw Exception(PARSER_RUNTIME,
822: result.exception_should_be_handled,
823: "catch block must set $exception.handled to some boolean value, not string");
824: } catch(...){
825: if(finally_code)
826: finally_result=r.process(*finally_code);
827: rethrow;
828: }
1.74 paf 829:
1.179 misha 830: if(finally_code)
831: finally_result=r.process(*finally_code);
1.123 paf 832:
1.136 paf 833: // write out processed body_code or catch_code
834: r.write_pass_lang(result.processed_code);
1.179 misha 835:
836: // write out processed finally code
837: if(finally_code)
838: r.write_pass_lang(finally_result);
1.74 paf 839: }
840:
1.138 paf 841: static void _throw_operator(Request&, MethodParams& params) {
1.178 misha 842: if(params.count()==1 && !params[0].is_string()) {
1.129 paf 843: if(HashStringValue *hash=params[0].get_hash()) {
844: const char* type=0;
845: if(Value* value=hash->get(exception_type_part_name))
1.78 paf 846: type=value->as_string().cstr();
1.129 paf 847: const String* source=0;
848: if(Value* value=hash->get(exception_source_part_name))
1.74 paf 849: source=&value->as_string();
1.138 paf 850: const char* comment=0;
1.129 paf 851: if(Value* value=hash->get(exception_comment_part_name))
1.74 paf 852: comment=value->as_string().cstr();
853:
1.78 paf 854: throw Exception(type,
1.129 paf 855: source?source:0,
856: "%s", comment?comment:"");
1.74 paf 857: } else
1.166 misha 858: throw Exception(PARSER_RUNTIME,
1.129 paf 859: 0,
1.178 misha 860: "one-param version has hash or string param");
1.74 paf 861: } else {
1.129 paf 862: const char* type=params.as_string(0, "type must be string").cstr();
1.178 misha 863: const String* source=params.count()>1? ¶ms.as_string(1, "source must be string"):0;
864: const char* comment=params.count()>2? params.as_string(2, "comment must be string").cstr():0;
865: throw Exception(type, source, "%s", comment?comment:"");
1.74 paf 866: }
1.132 paf 867: }
1.129 paf 868:
1.150 paf 869: static void _sleep_operator(Request& r, MethodParams& params) {
870: double seconds=params.as_double(0, "seconds must be double", r);
1.151 paf 871: pa_sleep((int)trunc(seconds), (int)trunc(seconds*1000));
1.150 paf 872: }
873:
1.129 paf 874: #if defined(WIN32) && defined(_DEBUG)
875: # define PA_BPT
1.138 paf 876: static void _bpt(Request&, MethodParams&) {
1.129 paf 877: _asm int 3;
878: }
879: #endif
880:
1.10 paf 881: // constructor
882:
1.129 paf 883: VClassMAIN::VClassMAIN(): VClass() {
884: set_name(*new String(MAIN_CLASS_NAME));
885:
886: #ifdef PA_BPT
887: // ^bpt[]
888: add_native_method("bpt", Method::CT_ANY, _bpt, 0, 0);
889: #endif
1.121 paf 890:
1.1 paf 891: // ^if(condition){code-when-true}
892: // ^if(condition){code-when-true}{code-when-false}
1.200 moko 893: // ^if(condition){code-when-true} (another condition){code-when-true} ... {code-when-false}
894: add_native_method("if", Method::CT_ANY, _if, 2, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 895:
1.194 misha 896: // ^untaint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
897: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 898:
1.194 misha 899: // ^taint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
900: add_native_method("taint", Method::CT_ANY, _taint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 901:
902: // ^process[code]
1.146 paf 903: add_native_method("process", Method::CT_ANY, _process, 1, 3);
1.1 paf 904:
905: // ^rem{code}
1.185 misha 906: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 907:
908: // ^while(condition){code}
1.185 misha 909: add_native_method("while", Method::CT_ANY, _while, 2, 3, Method::CO_WITHOUT_FRAME);
1.1 paf 910:
911: // ^use[file]
1.10 paf 912: add_native_method("use", Method::CT_ANY, _use, 1, 1);
1.1 paf 913:
1.164 paf 914: // ^break[]
1.185 misha 915: add_native_method("break", Method::CT_ANY, _break, 0, 0, Method::CO_WITHOUT_FRAME);
916:
1.164 paf 917: // ^continue[]
1.185 misha 918: add_native_method("continue", Method::CT_ANY, _continue, 0, 0, Method::CO_WITHOUT_FRAME);
919:
1.54 paf 920: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.185 misha 921: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1, Method::CO_WITHOUT_WCONTEXT);
1.1 paf 922:
923: // ^eval(expr)
924: // ^eval(expr)[format]
1.185 misha 925: add_native_method("eval", Method::CT_ANY, _eval, 1, 2, Method::CO_WITHOUT_FRAME);
1.52 parser 926:
1.1 paf 927: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 928: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
929:
1.63 paf 930:
1.136 paf 931: // ^cache[file_spec](time){code}[{catch code}] time=0 no cache
1.65 paf 932: // ^cache[file_spec] delete cache
1.161 paf 933: // ^cache[] get current expiration time
934: add_native_method("cache", Method::CT_ANY, _cache, 0, 4);
1.63 paf 935:
1.28 parser 936: // switch
937:
938: // ^switch[value]{cases}
1.185 misha 939: add_native_method("switch", Method::CT_ANY, _switch, 2, 2, Method::CO_WITHOUT_FRAME);
1.28 parser 940:
941: // ^case[value]{code}
1.185 misha 942: add_native_method("case", Method::CT_ANY, _case, 2, 10000, Method::CO_WITHOUT_FRAME);
1.74 paf 943:
944: // try-catch
945:
946: // ^try{code}{catch code}
1.185 misha 947: add_native_method("try", Method::CT_ANY, _try_operator, 2, 3, Method::CO_WITHOUT_FRAME);
1.74 paf 948: // ^throw[$exception hash]
949: // ^throw[type;source;comment]
950: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
951:
1.150 paf 952: add_native_method("sleep", Method::CT_ANY, _sleep_operator, 1, 1);
1.10 paf 953: }
1.11 paf 954:
955: // constructor & configurator
1.1 paf 956:
1.129 paf 957: VStateless_class& VClassMAIN_create() {
958: return *new VClassMAIN;
1.1 paf 959: }
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