Annotation of parser3/src/classes/op.C, revision 1.202
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:
1.202 ! moko 8: static const char * const IDENT_OP_C="$Date: 2010-07-05 05:54:46 $";
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) {
1.202 ! moko 223: VMethodFrame frame(*main_method, r.get_method_frame()->caller(), *target_self);
! 224: frame.empty_params();
! 225: r.op_call_write(frame);
1.1 paf 226: }
227: }
228:
1.138 paf 229: static void _rem(Request&, MethodParams& params) {
1.129 paf 230: params.as_junction(0, "body must be code");
1.1 paf 231: }
232:
1.129 paf 233: static void _while(Request& r, MethodParams& params) {
1.196 misha 234: InCycle temp(r);
1.164 paf 235:
1.170 misha 236: Value& vcondition=params.as_expression(0, "condition must be number, bool or expression");
237:
1.162 paf 238: Value& body_code=params.as_junction(1, "body must be code");
239: Value* delim_maybe_code=params.count()>2?¶ms[2]:0;
1.1 paf 240:
241: // while...
242: int endless_loop_count=0;
1.186 misha 243: if(delim_maybe_code){ // delimiter set
1.185 misha 244: bool need_delim=false;
245: while(true) {
246: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
247: throw Exception(PARSER_RUNTIME,
248: 0,
249: "endless loop detected");
250:
251: if(!r.process_to_value(vcondition, false/*don't intercept string*/).as_bool())
252: break;
1.1 paf 253:
1.185 misha 254: StringOrValue sv_processed=r.process(body_code);
255: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 misha 256:
1.185 misha 257: const String* s_processed=sv_processed.get_string();
1.186 misha 258: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 259: if(need_delim) // need delim & iteration produced string?
260: r.write_pass_lang(r.process(*delim_maybe_code));
261: else
262: need_delim=true;
263: }
264: r.write_pass_lang(sv_processed);
1.1 paf 265:
1.185 misha 266: if(lskip==Request::SKIP_BREAK)
267: break;
1.162 paf 268: }
1.185 misha 269: } else {
270: while(true) {
271: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
272: throw Exception(PARSER_RUNTIME,
273: 0,
274: "endless loop detected");
275:
276: if(!r.process_to_value(vcondition, false/*don't intercept string*/).as_bool())
277: break;
1.164 paf 278:
1.185 misha 279: r.process_write(body_code);
280: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
281:
282: if(lskip==Request::SKIP_BREAK)
283: break;
284: }
1.1 paf 285: }
286: }
287:
1.129 paf 288: static void _use(Request& r, MethodParams& params) {
1.171 misha 289: Value& vfile=params.as_no_junction(0, FILE_NAME_MUST_NOT_BE_CODE);
1.199 misha 290:
291: // _use could be called from the parser3 method only, so caller is always defined
1.202 ! moko 292: r.use_file(r.main_class, vfile.as_string(), r.get_method_filename(&r.get_method_frame()->caller()->method));
1.1 paf 293: }
294:
1.164 paf 295: static void set_skip(Request& r, Request::Skip askip) {
1.196 misha 296: if(!r.get_in_cycle())
1.166 misha 297: throw Exception(PARSER_RUNTIME,
1.164 paf 298: 0,
299: "without cycle");
300:
301: r.set_skip(askip);
302: }
303:
304: static void _break(Request& r, MethodParams&) {
305: set_skip(r, Request::SKIP_BREAK);
306: }
307:
308: static void _continue(Request& r, MethodParams&) {
309: set_skip(r, Request::SKIP_CONTINUE);
310: }
311:
1.129 paf 312: static void _for(Request& r, MethodParams& params) {
1.196 misha 313: InCycle temp(r);
1.164 paf 314:
1.129 paf 315: const String& var_name=params.as_string(0, "var name must be string");
316: int from=params.as_int(1, "from must be int", r);
317: int to=params.as_int(2, "to must be int", r);
1.186 misha 318: Value& body_code=params.as_junction(3, "body must be code");
1.129 paf 319: Value* delim_maybe_code=params.count()>4?¶ms[4]:0;
1.1 paf 320:
1.57 paf 321: if(to-from>=MAX_LOOPS) // too long loop?
1.166 misha 322: throw Exception(PARSER_RUNTIME,
1.129 paf 323: 0,
1.57 paf 324: "endless loop detected");
325:
1.129 paf 326: VInt* vint=new VInt(0);
1.154 paf 327:
328: VMethodFrame& caller=*r.get_method_frame()->caller();
1.197 misha 329: caller.put_element(var_name, vint, false);
1.186 misha 330: if(delim_maybe_code){ // delimiter set
1.185 misha 331: bool need_delim=false;
332:
333: for(int i=from; i<=to; i++) {
334: vint->set_int(i);
335:
336: StringOrValue sv_processed=r.process(body_code);
337: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 misha 338:
1.185 misha 339: const String* s_processed=sv_processed.get_string();
1.186 misha 340: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 341: if(need_delim) // need delim & iteration produced string?
342: r.write_pass_lang(r.process(*delim_maybe_code));
343: else
344: need_delim=true;
345: }
346: r.write_pass_lang(sv_processed);
1.1 paf 347:
1.185 misha 348: if(lskip==Request::SKIP_BREAK)
349: break;
1.1 paf 350: }
1.185 misha 351: } else {
352: for(int i=from; i<=to; i++) {
353: vint->set_int(i);
354:
355: r.process_write(body_code);
356: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.164 paf 357:
1.185 misha 358: if(lskip==Request::SKIP_BREAK)
359: break;
360: }
1.1 paf 361: }
362: }
363:
1.129 paf 364: static void _eval(Request& r, MethodParams& params) {
365: Value& expr=params.as_junction(0, "need expression");
1.1 paf 366: // evaluate expresion
1.129 paf 367: Value& value_result=r.process_to_value(expr,
1.165 misha 368: false/*don't intercept string*/).as_expr_result();
1.129 paf 369: if(params.count()>1) {
1.177 misha 370: const String& fmt=params.as_string(1, "fmt must be string").trim();
371: if(fmt.is_empty()){
372: r.write_no_lang(value_result);
373: } else {
374: r.write_no_lang(String(format(value_result.as_double(), fmt.cstrm())));
375: }
1.91 paf 376: } else
1.129 paf 377: r.write_no_lang(value_result);
1.1 paf 378: }
379:
1.129 paf 380: static void _connect(Request& r, MethodParams& params) {
1.63 paf 381: #ifdef RESOURCES_DEBUG
382: struct timeval mt[2];
383: #endif
1.129 paf 384: Value& url=params.as_no_junction(0, "url must not be code");
385: Value& body_code=params.as_junction(1, "body must be code");
1.1 paf 386:
1.129 paf 387: Table* protocol2driver_and_client=0;
1.197 misha 388: if(Value* sql=r.main_class.get_element(String(MAIN_SQL_NAME))) {
389: if(Value* element=sql->get_element(String(MAIN_SQL_DRIVERS_NAME))) {
1.113 paf 390: protocol2driver_and_client=element->get_table();
391: }
392: }
1.11 paf 393:
1.63 paf 394: #ifdef RESOURCES_DEBUG
395: //measure:before
396: gettimeofday(&mt[0],NULL);
397: #endif
1.1 paf 398: // connect
1.142 paf 399: SQL_Connection* connection=SQL_driver_manager->get_connection(url.as_string(),
1.144 paf 400: protocol2driver_and_client,
1.180 misha 401: r.charsets.source().NAME().cstr(),
402: r.request_info.document_root);
1.1 paf 403:
1.63 paf 404: #ifdef RESOURCES_DEBUG
405: //measure:after connect
406: gettimeofday(&mt[1],NULL);
407:
408: double t[2];
409: for(int i=0;i<2;i++)
410: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
411:
412: r.sql_connect_time+=t[1]-t[0];
413: #endif
1.129 paf 414: Temp_connection temp_connection(r, connection);
1.1 paf 415: // execute body
1.53 parser 416: try {
1.189 misha 417: r.process_write(body_code);
1.129 paf 418: connection->commit();
419: connection->close();
1.75 paf 420: } catch(...) { // process problem
1.129 paf 421: connection->rollback();
422: connection->close();
423: rethrow;
1.1 paf 424: }
425: }
426:
1.41 parser 427: #ifndef DOXYGEN
1.129 paf 428: class Switch_data: public PA_Object {
429: public:
430: Request& r;
1.181 misha 431: const String* searching_string;
432: double searching_double;
1.129 paf 433: Value* found;
434: Value* _default;
435: public:
436: Switch_data(Request& ar, Value& asearching):
1.181 misha 437: r(ar)
438: {
439: if(asearching.is_string() || asearching.is_void()){
440: searching_string=&asearching.as_string();
441: searching_double=0;
442: } else {
443: searching_string=0;
444: searching_double=asearching.as_double();
445: }
446: }
1.28 parser 447: };
1.41 parser 448: #endif
1.129 paf 449: static void _switch(Request& r, MethodParams& params) {
450: Switch_data* data=new Switch_data(r, r.process_to_value(params[0]));
1.135 paf 451: Temp_hash_value<const String::Body, void*>
1.129 paf 452: switch_data_setter(r.classes_conf, switch_data_name, data);
1.28 parser 453:
1.129 paf 454: Value& cases_code=params.as_junction(1, "switch cases must be code");
1.82 paf 455: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
456: // because of stacked WWrapper used there as wcontext
1.84 paf 457: r.process(cases_code, true/*intercept_string*/);
1.147 paf 458: if(Value* selected_code=data->found? data->found: data->_default)
1.107 paf 459: r.write_pass_lang(r.process(*selected_code));
1.28 parser 460: }
461:
1.129 paf 462: static void _case(Request& r, MethodParams& params) {
463: Switch_data* data=static_cast<Switch_data*>(r.classes_conf.get(switch_data_name));
1.38 parser 464: if(!data)
1.166 misha 465: throw Exception(PARSER_RUNTIME,
1.129 paf 466: 0,
1.38 parser 467: "without switch");
1.28 parser 468:
1.181 misha 469: if(data->found) // matches already was found
470: return;
471:
1.129 paf 472: int count=params.count();
1.184 misha 473: Value* code=¶ms.as_expression(--count, "case result must be code");
474:
475: #ifdef USE_DESTRUCTORS
476: Junction *j=code->get_junction();
477: if (j){
478: code=new VJunction(j->self,j->method,j->method_frame,j->rcontext,j->wcontext,j->code);
479: if (j->wcontext) j->wcontext->attach_junction((VJunction *)code);
480: }
481: #endif
1.83 paf 482:
1.181 misha 483: for(int i=0; i<count; i++){
1.129 paf 484: Value& value=r.process_to_value(params[i]);
1.28 parser 485:
1.181 misha 486: if(value.is_string() && value.as_string() == CASE_DEFAULT_VALUE){
1.184 misha 487: data->_default=code;
1.181 misha 488: continue;
1.28 parser 489: }
490:
491: bool matches;
1.181 misha 492: if(data->searching_string)
493: matches=(*data->searching_string) == value.as_string();
1.28 parser 494: else
1.181 misha 495: matches=data->searching_double == value.as_double();
1.82 paf 496:
1.181 misha 497: if(matches){
1.184 misha 498: data->found=code;
1.28 parser 499: break;
500: }
501: }
502: }
1.136 paf 503: #ifndef DOXYGEN
504: struct Try_catch_result {
505: StringOrValue processed_code;
506: const String* exception_should_be_handled;
507:
508: Try_catch_result(): exception_should_be_handled(0) {}
509: };
510: #endif
511:
512: /// used by ^try and ^cache, @returns $exception.handled[string] if any
513: template<class I>
514: static Try_catch_result try_catch(Request& r,
515: StringOrValue body_code(Request&, I), I info,
1.179 misha 516: Value* catch_code,
517: bool could_be_handled_by_caller=false)
1.136 paf 518: {
519: Try_catch_result result;
1.179 misha 520:
1.136 paf 521: if(!catch_code) {
522: result.processed_code=body_code(r, info);
523: return result;
524: }
525:
526: // taking snapshot of try-context
527: Request_context_saver try_context(r);
528: try {
529: result.processed_code=body_code(r, info);
530: } catch(const Exception& e) {
531: Request_context_saver throw_context(r); // taking snapshot of throw-context [stack trace contains error]
532: Request::Exception_details details=r.get_details(e);
533: try_context.restore(); // restoring try-context to perform catch-code
534:
535: Junction* junction=catch_code->get_junction();
536: Value* method_frame=junction->method_frame;
1.197 misha 537: Value* saved_exception_var_value=method_frame->get_element(exception_var_name);
1.154 paf 538: VMethodFrame& frame=*junction->method_frame;
1.197 misha 539: frame.put_element(exception_var_name, &details.vhash, false);
1.179 misha 540:
1.136 paf 541: result.processed_code=r.process(*catch_code);
542:
543: // retriving $exception.handled, restoring $exception var
544: Value* vhandled=details.vhash.hash().get(exception_handled_part_name);
1.197 misha 545: frame.put_element(exception_var_name, saved_exception_var_value, false);
1.136 paf 546:
547: bool bhandled=false;
548: if(vhandled) {
549: if(vhandled->is_string()) { // not simple $exception.handled(1/0)?
1.160 paf 550: if(could_be_handled_by_caller) { // and we can possibly handle it
551: result.exception_should_be_handled=vhandled->get_string(); // considering 'recovered' and let the caller recover
552: return result;
553: }
554:
555: bhandled=false;
556: } else
1.179 misha 557: bhandled=vhandled->as_bool();
1.136 paf 558: }
559:
560: if(!bhandled) {
561: throw_context.restore(); // restoring throw-context [exception were not handled]
562: rethrow;
563: }
564: }
1.179 misha 565:
1.136 paf 566: return result;
567: }
1.28 parser 568:
1.63 paf 569: // cache--
570:
571: // consts
572:
1.152 paf 573: const int DATA_STRING_SERIALIZED_VERSION=0x0006;
1.63 paf 574:
575: // helper types
576:
577: #ifndef DOXYGEN
578: struct Data_string_serialized_prolog {
579: int version;
1.79 paf 580: time_t expires;
1.63 paf 581: };
582: #endif
583:
1.68 paf 584: void cache_delete(const String& file_spec) {
1.167 misha 585: file_delete(file_spec, false/*fail_on_problem*/);
1.63 paf 586: }
1.69 paf 587:
588: #ifndef DOXYGEN
1.135 paf 589: struct Cache_scope {
1.129 paf 590: public:
1.79 paf 591: time_t expires;
1.135 paf 592: const String* body_from_disk;
1.79 paf 593: };
1.69 paf 594: struct Locked_process_and_cache_put_action_info {
595: Request *r;
1.136 paf 596: Cache_scope *scope;
1.167 misha 597: Value* body_code;
598: Value* catch_code;
1.136 paf 599: const String* processed_code;
1.69 paf 600: };
601: #endif
1.136 paf 602:
603:
604:
605: static StringOrValue process_cache_body_code(Request& r, Value* body_code) {
1.153 paf 606: return StringOrValue(r.process_to_string(*body_code));
1.136 paf 607: }
608:
1.129 paf 609: /* @todo maybe network order worth spending some effort?
610: don't bothering myself with network byte order,
611: am not planning to be able to move resulting file across platforms
612: */
1.69 paf 613: static void locked_process_and_cache_put_action(int f, void *context) {
614: Locked_process_and_cache_put_action_info& info=
615: *static_cast<Locked_process_and_cache_put_action_info *>(context);
1.129 paf 616:
1.160 paf 617: const String* body_from_disk=info.scope->body_from_disk;
1.69 paf 618: // body->process
1.136 paf 619: Try_catch_result result=try_catch(*info.r,
620: process_cache_body_code, info.body_code,
1.160 paf 621: info.catch_code, body_from_disk!=0 /*we have something old=we can handle=recover later*/);
1.136 paf 622:
623: if(result.exception_should_be_handled) {
624: if(*result.exception_should_be_handled==CACHE_EXCEPTION_HANDLED_CACHE_NAME) {
1.160 paf 625: assert(body_from_disk);
626: info.processed_code=body_from_disk;
1.136 paf 627: } else
1.166 misha 628: throw Exception(PARSER_RUNTIME,
1.136 paf 629: result.exception_should_be_handled,
630: "$"EXCEPTION_VAR_NAME"."EXCEPTION_HANDLED_PART_NAME" value must be "
631: "either boolean or string '"CACHE_EXCEPTION_HANDLED_CACHE_NAME"'");
632: } else
633: info.processed_code=&result.processed_code.as_string();
1.69 paf 634:
1.79 paf 635: // expiration time not spoiled by ^cache(0) or something?
1.136 paf 636: if(info.scope->expires > time(0)) {
1.79 paf 637: // string -serialize> buffer
1.136 paf 638: String::Cm serialized=info.processed_code->serialize(
1.129 paf 639: sizeof(Data_string_serialized_prolog));
1.79 paf 640: Data_string_serialized_prolog& prolog=
1.129 paf 641: *reinterpret_cast<Data_string_serialized_prolog *>(serialized.str);
1.79 paf 642: prolog.version=DATA_STRING_SERIALIZED_VERSION;
1.136 paf 643: prolog.expires=info.scope->expires;
1.79 paf 644:
645: // buffer -write> file
1.129 paf 646: write(f, serialized.str, serialized.length);
1.79 paf 647: } else // expired!
1.136 paf 648: info.scope->expires=0; // flag it so that could be easily checked by caller
1.69 paf 649: }
1.129 paf 650: const String* locked_process_and_cache_put(Request& r,
1.128 paf 651: Value& body_code,
1.136 paf 652: Value* catch_code,
653: Cache_scope& scope,
654: const String& file_spec)
655: {
1.140 paf 656: Locked_process_and_cache_put_action_info info={&r, &scope, &body_code, catch_code, 0};
1.69 paf 657:
1.129 paf 658: const String* result=file_write_action_under_lock(
1.69 paf 659: file_spec,
1.168 misha 660: "cache_put",
661: locked_process_and_cache_put_action,
662: &info,
1.69 paf 663: false/*as_text*/,
664: false/*do_append*/,
1.173 misha 665: false/*block == don't wait till other thread release lock*/,
666: false/*dun throw exception if lock failed*/) ? info.processed_code: 0;
1.168 misha 667:
1.100 paf 668: time_t now=time(0);
1.136 paf 669: if(scope.expires<=now)
1.79 paf 670: cache_delete(file_spec);
671: return result;
1.63 paf 672: }
1.137 paf 673: #ifndef DOXYGEN
1.135 paf 674: struct Cache_get_result {
675: const String* body;
676: bool expired;
1.137 paf 677: };
678: #endif
679: static Cache_get_result cache_get(Request_charsets& charsets, const String& file_spec, time_t now) {
1.140 paf 680: Cache_get_result result={0, false};
1.135 paf 681:
1.129 paf 682: File_read_result file=file_read(charsets, file_spec,
1.63 paf 683: false/*as_text*/,
1.129 paf 684: 0, //no params
685: false/*fail_on_read_problem*/);
686: if(file.success && file.length/* ignore reads which are empty due to
1.72 paf 687: non-unary open+lockEX conflict with lockSH */) {
1.129 paf 688:
1.72 paf 689: Data_string_serialized_prolog& prolog=
1.129 paf 690: *reinterpret_cast<Data_string_serialized_prolog *>(file.str);
1.63 paf 691:
1.135 paf 692: String* body=new String;
1.72 paf 693: if(
1.129 paf 694: file.length>=sizeof(Data_string_serialized_prolog)
1.135 paf 695: && prolog.version==DATA_STRING_SERIALIZED_VERSION) {
696: if(body->deserialize(sizeof(Data_string_serialized_prolog), file.str, file.length)) {
697: result.body=body;
698: result.expired=prolog.expires <= now;
699: }
700: }
1.72 paf 701: }
1.63 paf 702:
1.135 paf 703: return result;
1.63 paf 704: }
1.129 paf 705: static time_t as_expires(Request& r, MethodParams& params,
1.79 paf 706: int index, time_t now) {
707: time_t result;
1.197 misha 708: if(Value* vdate=params[index].as(VDATE_TYPE))
1.129 paf 709: result=static_cast<VDate*>(vdate)->get_time();
1.79 paf 710: else
1.129 paf 711: result=now+(time_t)params.as_double(index, "lifespan must be date or number", r);
1.79 paf 712:
713: return result;
714: }
1.129 paf 715: static const String& as_file_spec(Request& r, MethodParams& params, int index) {
716: return r.absolute(params.as_string(index, "filespec must be string"));
1.79 paf 717: }
1.129 paf 718: static void _cache(Request& r, MethodParams& params) {
1.173 misha 719: if(params.count()==0) {
720: // ^cache[] -- return current expiration time
1.158 paf 721: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
722: if(!scope)
1.166 misha 723: throw Exception(PARSER_RUNTIME,
1.158 paf 724: 0,
725: "expire-time get without cache");
726: r.write_no_lang(*new VDate(scope->expires));
727: return;
728: }
729:
1.79 paf 730: time_t now=time(0);
731:
1.129 paf 732: if(params.count()==1) {
1.173 misha 733: // ^cache[filename] ^cache(seconds) ^cache[expires date]
1.129 paf 734: if(params[0].is_string()) { // filename?
1.79 paf 735: cache_delete(as_file_spec(r, params, 0));
736: return;
737: }
738:
739: // secods|expires date
1.135 paf 740: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
741: if(!scope)
1.166 misha 742: throw Exception(PARSER_RUNTIME,
1.129 paf 743: 0,
1.79 paf 744: "expire-time reducing instruction without cache");
745:
1.129 paf 746: time_t expires=as_expires(r, params, 0, now);
1.135 paf 747: if(expires < scope->expires)
748: scope->expires=expires;
1.79 paf 749:
750: return;
1.149 paf 751: } else if(params.count()<3)
1.166 misha 752: throw Exception(PARSER_RUNTIME,
1.149 paf 753: 0,
754: "invalid number of parameters");
1.63 paf 755:
756: // file_spec, expires, body code
1.172 misha 757: const String& file_spec=as_file_spec(r, params, 0);
1.65 paf 758:
1.141 paf 759: Cache_scope scope={as_expires(r, params, 1, now), 0};
1.135 paf 760:
761: Temp_hash_value<const String::Body, void*>
762: cache_scope_setter(r.classes_conf, cache_data_name, &scope);
1.136 paf 763: Value& body_code=params.as_junction(2, "body_code must be code");
764: Value* catch_code=0;
765: if(params.count()>3)
766: catch_code=¶ms.as_junction(3, "catch_code must be code");
1.63 paf 767:
1.168 misha 768: if(scope.expires>now) {
769: Cache_get_result cached=cache_get(r.charsets, file_spec, now);
1.69 paf 770:
1.168 misha 771: if(cached.body) { // have cached copy
1.174 misha 772: if(cached.expired) {
773: scope.body_from_disk=cached.body; // storing for user to retrive it with ^cache[]
774: } else {
775: // and it's not expired yet write it out
1.168 misha 776: r.write_assign_lang(*cached.body);
777: // happy with it
778: return;
779: }
780: }
781:
782: // no cached info or it's already expired
1.173 misha 783:
784: // trying to process it under lock and store result in file
1.174 misha 785: const String* processed_body=locked_process_and_cache_put(r, body_code, catch_code, scope, file_spec);
1.173 misha 786: if(processed_body){
1.174 misha 787: // write it out
788: r.write_assign_lang(*processed_body);
789: // happy with it
790: return;
1.173 misha 791: } else {
792: // we fail while get exclusive lock. nvm, we just execute body_code a bit later
1.174 misha 793: }
1.69 paf 794: } else {
1.79 paf 795: // instructed not to cache; forget cached copy
1.68 paf 796: cache_delete(file_spec);
1.69 paf 797: }
1.168 misha 798:
799: // process without cacheing
800: const String& processed_body=r.process_to_string(body_code);
801: // write it out
802: r.write_assign_lang(processed_body);
1.63 paf 803: }
804:
1.136 paf 805: static StringOrValue process_try_body_code(Request& r, Value* body_code) {
806: return r.process(*body_code);
807: }
1.129 paf 808: static void _try_operator(Request& r, MethodParams& params) {
809: Value& body_code=params.as_junction(0, "body_code must be code");
810: Value& catch_code=params.as_junction(1, "catch_code must be code");
1.179 misha 811: Value* finally_code=(params.count()==3) ? ¶ms.as_junction(2, "finally_code must be code") : 0;
812:
813: Try_catch_result result;
814: StringOrValue finally_result;
815: try{
816: result=try_catch(r,
817: process_try_body_code, &body_code,
818: &catch_code);
819: if(result.exception_should_be_handled)
820: throw Exception(PARSER_RUNTIME,
821: result.exception_should_be_handled,
822: "catch block must set $exception.handled to some boolean value, not string");
823: } catch(...){
824: if(finally_code)
825: finally_result=r.process(*finally_code);
826: rethrow;
827: }
1.74 paf 828:
1.179 misha 829: if(finally_code)
830: finally_result=r.process(*finally_code);
1.123 paf 831:
1.136 paf 832: // write out processed body_code or catch_code
833: r.write_pass_lang(result.processed_code);
1.179 misha 834:
835: // write out processed finally code
836: if(finally_code)
837: r.write_pass_lang(finally_result);
1.74 paf 838: }
839:
1.138 paf 840: static void _throw_operator(Request&, MethodParams& params) {
1.178 misha 841: if(params.count()==1 && !params[0].is_string()) {
1.129 paf 842: if(HashStringValue *hash=params[0].get_hash()) {
843: const char* type=0;
844: if(Value* value=hash->get(exception_type_part_name))
1.78 paf 845: type=value->as_string().cstr();
1.129 paf 846: const String* source=0;
847: if(Value* value=hash->get(exception_source_part_name))
1.74 paf 848: source=&value->as_string();
1.138 paf 849: const char* comment=0;
1.129 paf 850: if(Value* value=hash->get(exception_comment_part_name))
1.74 paf 851: comment=value->as_string().cstr();
852:
1.78 paf 853: throw Exception(type,
1.129 paf 854: source?source:0,
855: "%s", comment?comment:"");
1.74 paf 856: } else
1.166 misha 857: throw Exception(PARSER_RUNTIME,
1.129 paf 858: 0,
1.178 misha 859: "one-param version has hash or string param");
1.74 paf 860: } else {
1.129 paf 861: const char* type=params.as_string(0, "type must be string").cstr();
1.178 misha 862: const String* source=params.count()>1? ¶ms.as_string(1, "source must be string"):0;
863: const char* comment=params.count()>2? params.as_string(2, "comment must be string").cstr():0;
864: throw Exception(type, source, "%s", comment?comment:"");
1.74 paf 865: }
1.132 paf 866: }
1.129 paf 867:
1.150 paf 868: static void _sleep_operator(Request& r, MethodParams& params) {
869: double seconds=params.as_double(0, "seconds must be double", r);
1.151 paf 870: pa_sleep((int)trunc(seconds), (int)trunc(seconds*1000));
1.150 paf 871: }
872:
1.129 paf 873: #if defined(WIN32) && defined(_DEBUG)
874: # define PA_BPT
1.138 paf 875: static void _bpt(Request&, MethodParams&) {
1.129 paf 876: _asm int 3;
877: }
878: #endif
879:
1.10 paf 880: // constructor
881:
1.129 paf 882: VClassMAIN::VClassMAIN(): VClass() {
883: set_name(*new String(MAIN_CLASS_NAME));
884:
885: #ifdef PA_BPT
886: // ^bpt[]
887: add_native_method("bpt", Method::CT_ANY, _bpt, 0, 0);
888: #endif
1.121 paf 889:
1.1 paf 890: // ^if(condition){code-when-true}
891: // ^if(condition){code-when-true}{code-when-false}
1.200 moko 892: // ^if(condition){code-when-true} (another condition){code-when-true} ... {code-when-false}
893: add_native_method("if", Method::CT_ANY, _if, 2, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 894:
1.194 misha 895: // ^untaint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
896: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 897:
1.194 misha 898: // ^taint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
899: add_native_method("taint", Method::CT_ANY, _taint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 900:
901: // ^process[code]
1.146 paf 902: add_native_method("process", Method::CT_ANY, _process, 1, 3);
1.1 paf 903:
904: // ^rem{code}
1.185 misha 905: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 906:
907: // ^while(condition){code}
1.185 misha 908: add_native_method("while", Method::CT_ANY, _while, 2, 3, Method::CO_WITHOUT_FRAME);
1.1 paf 909:
910: // ^use[file]
1.10 paf 911: add_native_method("use", Method::CT_ANY, _use, 1, 1);
1.1 paf 912:
1.164 paf 913: // ^break[]
1.185 misha 914: add_native_method("break", Method::CT_ANY, _break, 0, 0, Method::CO_WITHOUT_FRAME);
915:
1.164 paf 916: // ^continue[]
1.185 misha 917: add_native_method("continue", Method::CT_ANY, _continue, 0, 0, Method::CO_WITHOUT_FRAME);
918:
1.54 paf 919: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.185 misha 920: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1, Method::CO_WITHOUT_WCONTEXT);
1.1 paf 921:
922: // ^eval(expr)
923: // ^eval(expr)[format]
1.185 misha 924: add_native_method("eval", Method::CT_ANY, _eval, 1, 2, Method::CO_WITHOUT_FRAME);
1.52 parser 925:
1.1 paf 926: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 927: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
928:
1.63 paf 929:
1.136 paf 930: // ^cache[file_spec](time){code}[{catch code}] time=0 no cache
1.65 paf 931: // ^cache[file_spec] delete cache
1.161 paf 932: // ^cache[] get current expiration time
933: add_native_method("cache", Method::CT_ANY, _cache, 0, 4);
1.63 paf 934:
1.28 parser 935: // switch
936:
937: // ^switch[value]{cases}
1.185 misha 938: add_native_method("switch", Method::CT_ANY, _switch, 2, 2, Method::CO_WITHOUT_FRAME);
1.28 parser 939:
940: // ^case[value]{code}
1.185 misha 941: add_native_method("case", Method::CT_ANY, _case, 2, 10000, Method::CO_WITHOUT_FRAME);
1.74 paf 942:
943: // try-catch
944:
945: // ^try{code}{catch code}
1.185 misha 946: add_native_method("try", Method::CT_ANY, _try_operator, 2, 3, Method::CO_WITHOUT_FRAME);
1.74 paf 947: // ^throw[$exception hash]
948: // ^throw[type;source;comment]
949: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
950:
1.150 paf 951: add_native_method("sleep", Method::CT_ANY, _sleep_operator, 1, 1);
1.10 paf 952: }
1.11 paf 953:
954: // constructor & configurator
1.1 paf 955:
1.129 paf 956: VStateless_class& VClassMAIN_create() {
957: return *new VClassMAIN;
1.1 paf 958: }
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