Annotation of parser3/src/classes/op.C, revision 1.214
1.1 paf 1: /** @file
1.9 paf 2: Parser: parser @b operators.
1.1 paf 3:
1.209 moko 4: Copyright (c) 2001-2012 Art. Lebedev Studio (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:
1.13 paf 8: #include "classes.h"
1.129 paf 9: #include "pa_vmethod_frame.h"
10:
1.1 paf 11: #include "pa_common.h"
1.134 paf 12: #include "pa_os.h"
1.1 paf 13: #include "pa_request.h"
14: #include "pa_vint.h"
15: #include "pa_sql_connection.h"
1.79 paf 16: #include "pa_vdate.h"
1.105 paf 17: #include "pa_vmethod_frame.h"
1.129 paf 18: #include "pa_vclass.h"
1.144 paf 19: #include "pa_charset.h"
1.1 paf 20:
1.214 ! moko 21: volatile const char * IDENT_OP_C="$Id: op.C,v 1.213 2013/03/07 23:00:13 moko Exp $";
1.209 moko 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);
1.204 misha 84: ULN("json", JSON);
1.129 paf 85: #undef ULN
86: }
87: } untaint_lang_name2enum;
88:
1.10 paf 89: // methods
90:
1.129 paf 91: static void _if(Request& r, MethodParams& params) {
1.200 moko 92: size_t max_param=params.count()-1;
93: size_t i=0;
94: do {
95: bool condition=params.as_bool(i, "condition must be expression", r);
96: if(condition) {
97: r.process_write(*params.get(i+1));
98: return;
99: }
100: i+=2;
101: } while (i < max_param);
102:
103: if(i == max_param)
104: r.process_write(*params.get(i));
1.1 paf 105: }
106:
1.210 moko 107: String::Language get_untaint_lang(const String& lang_name){
1.175 misha 108: String::Language lang=untaint_lang_name2enum.get(lang_name);
109: if(!lang)
1.210 moko 110: throw Exception(PARSER_RUNTIME, &lang_name, "invalid taint language");
1.175 misha 111: return lang;
112: }
113:
1.129 paf 114: static void _untaint(Request& r, MethodParams& params) {
115: String::Language lang;
116: if(params.count()==1)
1.175 misha 117: lang=String::L_AS_IS; // mark as simply 'as-is'. useful in html from sql
118: else
1.210 moko 119: lang=get_untaint_lang(params.as_string(0, "lang must be string"));
1.1 paf 120:
121: {
1.129 paf 122: Value& vbody=params.as_junction(params.count()-1, "body must be code");
1.1 paf 123:
1.191 misha 124: Temp_lang temp_lang(r, lang); // set temporarily specified ^untaint[language;
125: StringOrValue result=r.process(vbody); // process marking tainted with that lang
1.188 misha 126: r.write_assign_lang(result);
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
1.210 moko 135: lang=get_untaint_lang(params.as_string(0, "lang must be string"));
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:
1.191 misha 140: String result(vbody.as_string(), lang); // force result language to specified
1.188 misha 141: r.write_assign_lang(result);
1.1 paf 142: }
143: }
144:
1.205 moko 145: static void _apply_taint(Request& r, MethodParams& params) {
1.210 moko 146: String::Language lang=params.count()==1 ? String::L_AS_IS : get_untaint_lang(params.as_string(0, "lang must be string"));
1.205 moko 147: const String &sbody=params.as_string(params.count()-1, "body must be string");
1.213 moko 148: String::Body result_body=sbody.cstr_to_string_body_untaint(lang, r.connection(false), &r.charsets);
1.205 moko 149: r.write_pass_lang(*new String(result_body, String::L_AS_IS));
150: }
151:
1.129 paf 152: static void _process(Request& r, MethodParams& params) {
153: Method* main_method;
154:
155: size_t index=0;
156: Value* target_self;
157: Value& maybe_target_self=params[index];
158: if(maybe_target_self.get_string() || maybe_target_self.get_junction())
159: target_self=&r.get_method_frame()->caller()->self();
160: else {
161: target_self=&maybe_target_self; index++;
162: }
163:
1.1 paf 164: {
1.197 misha 165: VStateless_class *target_class=target_self->get_class();
1.116 paf 166: if(!target_class)
1.166 misha 167: throw Exception(PARSER_RUNTIME,
1.129 paf 168: 0,
1.116 paf 169: "no target class");
1.114 paf 170:
1.73 paf 171: // temporary remove language change
1.192 misha 172: Temp_lang temp_lang(r, String::L_PARSER_CODE);
1.1 paf 173: // temporary zero @main so to maybe-replace it in processed code
1.129 paf 174: Temp_method temp_method_main(*target_class, main_method_name, 0);
1.1 paf 175: // temporary zero @auto so it wouldn't be auto-called in Request::use_buf
1.129 paf 176: Temp_method temp_method_auto(*target_class, auto_method_name, 0);
177:
178: const String* main_alias=0;
1.146 paf 179: const String* file_alias=0;
180: int line_no_alias_offset=0;
1.211 misha 181:
182: size_t options_index=index+1;
183: if(options_index<params.count())
184: if(HashStringValue* options=params.as_hash(options_index)) {
185: int valid_options=0;
186: if(Value* vmain_alias=options->get(PROCESS_MAIN_OPTION_NAME)) {
187: valid_options++;
188: main_alias=&vmain_alias->as_string();
189: }
190: if(Value* vfile_alias=options->get(PROCESS_FILE_OPTION_NAME)) {
191: valid_options++;
192: file_alias=&vfile_alias->as_string();
193: }
194: if(Value* vline_no_alias_offset=options->get(PROCESS_LINENO_OPTION_NAME)) {
195: valid_options++;
196: line_no_alias_offset=vline_no_alias_offset->as_int();
197: }
198:
199: if(valid_options!=options->count())
200: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
1.146 paf 201: }
1.129 paf 202:
1.146 paf 203: uint processe_file_no=file_alias?
204: r.register_file(r.absolute(*file_alias))
205: : pseudo_file_no__process;
206: // process...{string}
207: Value& vjunction=params.as_junction(index, "body must be code");
208: // evaluate source to process
209: const String& source=r.process_to_string(vjunction);
210: r.use_buf(*target_class,
1.190 misha 211: source.untaint_cstr(String::L_AS_IS, r.connection(false)),
1.146 paf 212: main_alias,
213: processe_file_no,
214: line_no_alias_offset);
1.1 paf 215:
1.73 paf 216: // main_method
1.129 paf 217: main_method=target_class->get_method(main_method_name);
1.73 paf 218: }
219: // after restoring current-request-lang
220: // maybe-execute @main[]
221: if(main_method) {
1.202 moko 222: VMethodFrame frame(*main_method, r.get_method_frame()->caller(), *target_self);
223: frame.empty_params();
1.203 moko 224: r.op_call(frame);
225: r.write_pass_lang(frame.result());
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())
1.208 misha 297: throw Exception(askip==Request::SKIP_BREAK?"parser.break":"parser.continue",
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) {
381: Value& url=params.as_no_junction(0, "url must not be code");
382: Value& body_code=params.as_junction(1, "body must be code");
1.1 paf 383:
1.129 paf 384: Table* protocol2driver_and_client=0;
1.197 misha 385: if(Value* sql=r.main_class.get_element(String(MAIN_SQL_NAME))) {
386: if(Value* element=sql->get_element(String(MAIN_SQL_DRIVERS_NAME))) {
1.113 paf 387: protocol2driver_and_client=element->get_table();
388: }
389: }
1.11 paf 390:
1.1 paf 391: // connect
1.142 paf 392: SQL_Connection* connection=SQL_driver_manager->get_connection(url.as_string(),
1.144 paf 393: protocol2driver_and_client,
1.180 misha 394: r.charsets.source().NAME().cstr(),
395: r.request_info.document_root);
1.1 paf 396:
1.214 ! moko 397: Temp_connection temp_connection(r, connection);
1.63 paf 398:
1.1 paf 399: // execute body
1.53 parser 400: try {
1.189 misha 401: r.process_write(body_code);
1.129 paf 402: connection->commit();
403: connection->close();
1.75 paf 404: } catch(...) { // process problem
1.129 paf 405: connection->rollback();
406: connection->close();
407: rethrow;
1.1 paf 408: }
409: }
410:
1.41 parser 411: #ifndef DOXYGEN
1.129 paf 412: class Switch_data: public PA_Object {
413: public:
414: Request& r;
1.181 misha 415: const String* searching_string;
416: double searching_double;
1.207 misha 417: bool searching_bool;
1.129 paf 418: Value* found;
419: Value* _default;
420: public:
421: Switch_data(Request& ar, Value& asearching):
1.181 misha 422: r(ar)
423: {
424: if(asearching.is_string() || asearching.is_void()){
425: searching_string=&asearching.as_string();
426: searching_double=0;
1.207 misha 427: searching_bool=false;
1.181 misha 428: } else {
429: searching_string=0;
430: searching_double=asearching.as_double();
1.207 misha 431: searching_bool=asearching.is_bool();
1.181 misha 432: }
433: }
1.28 parser 434: };
1.41 parser 435: #endif
1.129 paf 436: static void _switch(Request& r, MethodParams& params) {
437: Switch_data* data=new Switch_data(r, r.process_to_value(params[0]));
1.135 paf 438: Temp_hash_value<const String::Body, void*>
1.129 paf 439: switch_data_setter(r.classes_conf, switch_data_name, data);
1.28 parser 440:
1.129 paf 441: Value& cases_code=params.as_junction(1, "switch cases must be code");
1.82 paf 442: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
443: // because of stacked WWrapper used there as wcontext
1.84 paf 444: r.process(cases_code, true/*intercept_string*/);
1.147 paf 445: if(Value* selected_code=data->found? data->found: data->_default)
1.107 paf 446: r.write_pass_lang(r.process(*selected_code));
1.28 parser 447: }
448:
1.129 paf 449: static void _case(Request& r, MethodParams& params) {
450: Switch_data* data=static_cast<Switch_data*>(r.classes_conf.get(switch_data_name));
1.38 parser 451: if(!data)
1.166 misha 452: throw Exception(PARSER_RUNTIME,
1.129 paf 453: 0,
1.38 parser 454: "without switch");
1.28 parser 455:
1.181 misha 456: if(data->found) // matches already was found
457: return;
458:
1.129 paf 459: int count=params.count();
1.184 misha 460: Value* code=¶ms.as_expression(--count, "case result must be code");
461:
462: #ifdef USE_DESTRUCTORS
463: Junction *j=code->get_junction();
464: if (j){
465: code=new VJunction(j->self,j->method,j->method_frame,j->rcontext,j->wcontext,j->code);
466: if (j->wcontext) j->wcontext->attach_junction((VJunction *)code);
467: }
468: #endif
1.83 paf 469:
1.181 misha 470: for(int i=0; i<count; i++){
1.129 paf 471: Value& value=r.process_to_value(params[i]);
1.28 parser 472:
1.181 misha 473: if(value.is_string() && value.as_string() == CASE_DEFAULT_VALUE){
1.184 misha 474: data->_default=code;
1.181 misha 475: continue;
1.28 parser 476: }
477:
478: bool matches;
1.181 misha 479: if(data->searching_string)
480: matches=(*data->searching_string) == value.as_string();
1.207 misha 481: else if(data->searching_bool || value.is_bool())
482: matches=(data->searching_double != 0) == value.as_bool();
1.28 parser 483: else
1.181 misha 484: matches=data->searching_double == value.as_double();
1.82 paf 485:
1.181 misha 486: if(matches){
1.184 misha 487: data->found=code;
1.28 parser 488: break;
489: }
490: }
491: }
1.136 paf 492: #ifndef DOXYGEN
493: struct Try_catch_result {
494: StringOrValue processed_code;
495: const String* exception_should_be_handled;
496:
497: Try_catch_result(): exception_should_be_handled(0) {}
498: };
499: #endif
500:
501: /// used by ^try and ^cache, @returns $exception.handled[string] if any
502: template<class I>
503: static Try_catch_result try_catch(Request& r,
504: StringOrValue body_code(Request&, I), I info,
1.179 misha 505: Value* catch_code,
506: bool could_be_handled_by_caller=false)
1.136 paf 507: {
508: Try_catch_result result;
1.179 misha 509:
1.136 paf 510: if(!catch_code) {
511: result.processed_code=body_code(r, info);
512: return result;
513: }
514:
515: // taking snapshot of try-context
516: Request_context_saver try_context(r);
517: try {
518: result.processed_code=body_code(r, info);
519: } catch(const Exception& e) {
520: Request_context_saver throw_context(r); // taking snapshot of throw-context [stack trace contains error]
521: Request::Exception_details details=r.get_details(e);
522: try_context.restore(); // restoring try-context to perform catch-code
523:
524: Junction* junction=catch_code->get_junction();
525: Value* method_frame=junction->method_frame;
1.197 misha 526: Value* saved_exception_var_value=method_frame->get_element(exception_var_name);
1.154 paf 527: VMethodFrame& frame=*junction->method_frame;
1.197 misha 528: frame.put_element(exception_var_name, &details.vhash, false);
1.179 misha 529:
1.136 paf 530: result.processed_code=r.process(*catch_code);
531:
532: // retriving $exception.handled, restoring $exception var
533: Value* vhandled=details.vhash.hash().get(exception_handled_part_name);
1.197 misha 534: frame.put_element(exception_var_name, saved_exception_var_value, false);
1.136 paf 535:
536: bool bhandled=false;
537: if(vhandled) {
538: if(vhandled->is_string()) { // not simple $exception.handled(1/0)?
1.160 paf 539: if(could_be_handled_by_caller) { // and we can possibly handle it
540: result.exception_should_be_handled=vhandled->get_string(); // considering 'recovered' and let the caller recover
541: return result;
542: }
543:
544: bhandled=false;
545: } else
1.179 misha 546: bhandled=vhandled->as_bool();
1.136 paf 547: }
548:
549: if(!bhandled) {
550: throw_context.restore(); // restoring throw-context [exception were not handled]
551: rethrow;
552: }
553: }
1.179 misha 554:
1.136 paf 555: return result;
556: }
1.28 parser 557:
1.63 paf 558: // cache--
559:
560: // consts
561:
1.152 paf 562: const int DATA_STRING_SERIALIZED_VERSION=0x0006;
1.63 paf 563:
564: // helper types
565:
566: #ifndef DOXYGEN
567: struct Data_string_serialized_prolog {
568: int version;
1.79 paf 569: time_t expires;
1.63 paf 570: };
571: #endif
572:
1.68 paf 573: void cache_delete(const String& file_spec) {
1.167 misha 574: file_delete(file_spec, false/*fail_on_problem*/);
1.63 paf 575: }
1.69 paf 576:
577: #ifndef DOXYGEN
1.135 paf 578: struct Cache_scope {
1.129 paf 579: public:
1.79 paf 580: time_t expires;
1.135 paf 581: const String* body_from_disk;
1.79 paf 582: };
1.69 paf 583: struct Locked_process_and_cache_put_action_info {
584: Request *r;
1.136 paf 585: Cache_scope *scope;
1.167 misha 586: Value* body_code;
587: Value* catch_code;
1.136 paf 588: const String* processed_code;
1.69 paf 589: };
590: #endif
1.136 paf 591:
592:
593:
594: static StringOrValue process_cache_body_code(Request& r, Value* body_code) {
1.153 paf 595: return StringOrValue(r.process_to_string(*body_code));
1.136 paf 596: }
597:
1.129 paf 598: /* @todo maybe network order worth spending some effort?
599: don't bothering myself with network byte order,
600: am not planning to be able to move resulting file across platforms
601: */
1.69 paf 602: static void locked_process_and_cache_put_action(int f, void *context) {
603: Locked_process_and_cache_put_action_info& info=
604: *static_cast<Locked_process_and_cache_put_action_info *>(context);
1.129 paf 605:
1.160 paf 606: const String* body_from_disk=info.scope->body_from_disk;
1.69 paf 607: // body->process
1.136 paf 608: Try_catch_result result=try_catch(*info.r,
609: process_cache_body_code, info.body_code,
1.160 paf 610: info.catch_code, body_from_disk!=0 /*we have something old=we can handle=recover later*/);
1.136 paf 611:
612: if(result.exception_should_be_handled) {
613: if(*result.exception_should_be_handled==CACHE_EXCEPTION_HANDLED_CACHE_NAME) {
1.160 paf 614: assert(body_from_disk);
615: info.processed_code=body_from_disk;
1.136 paf 616: } else
1.166 misha 617: throw Exception(PARSER_RUNTIME,
1.136 paf 618: result.exception_should_be_handled,
619: "$"EXCEPTION_VAR_NAME"."EXCEPTION_HANDLED_PART_NAME" value must be "
620: "either boolean or string '"CACHE_EXCEPTION_HANDLED_CACHE_NAME"'");
621: } else
622: info.processed_code=&result.processed_code.as_string();
1.69 paf 623:
1.79 paf 624: // expiration time not spoiled by ^cache(0) or something?
1.136 paf 625: if(info.scope->expires > time(0)) {
1.79 paf 626: // string -serialize> buffer
1.136 paf 627: String::Cm serialized=info.processed_code->serialize(
1.129 paf 628: sizeof(Data_string_serialized_prolog));
1.79 paf 629: Data_string_serialized_prolog& prolog=
1.129 paf 630: *reinterpret_cast<Data_string_serialized_prolog *>(serialized.str);
1.79 paf 631: prolog.version=DATA_STRING_SERIALIZED_VERSION;
1.136 paf 632: prolog.expires=info.scope->expires;
1.79 paf 633:
634: // buffer -write> file
1.129 paf 635: write(f, serialized.str, serialized.length);
1.79 paf 636: } else // expired!
1.136 paf 637: info.scope->expires=0; // flag it so that could be easily checked by caller
1.69 paf 638: }
1.129 paf 639: const String* locked_process_and_cache_put(Request& r,
1.128 paf 640: Value& body_code,
1.136 paf 641: Value* catch_code,
642: Cache_scope& scope,
643: const String& file_spec)
644: {
1.140 paf 645: Locked_process_and_cache_put_action_info info={&r, &scope, &body_code, catch_code, 0};
1.69 paf 646:
1.129 paf 647: const String* result=file_write_action_under_lock(
1.69 paf 648: file_spec,
1.168 misha 649: "cache_put",
650: locked_process_and_cache_put_action,
651: &info,
1.69 paf 652: false/*as_text*/,
653: false/*do_append*/,
1.173 misha 654: false/*block == don't wait till other thread release lock*/,
655: false/*dun throw exception if lock failed*/) ? info.processed_code: 0;
1.168 misha 656:
1.100 paf 657: time_t now=time(0);
1.136 paf 658: if(scope.expires<=now)
1.79 paf 659: cache_delete(file_spec);
660: return result;
1.63 paf 661: }
1.137 paf 662: #ifndef DOXYGEN
1.135 paf 663: struct Cache_get_result {
664: const String* body;
665: bool expired;
1.137 paf 666: };
667: #endif
668: static Cache_get_result cache_get(Request_charsets& charsets, const String& file_spec, time_t now) {
1.140 paf 669: Cache_get_result result={0, false};
1.135 paf 670:
1.129 paf 671: File_read_result file=file_read(charsets, file_spec,
1.63 paf 672: false/*as_text*/,
1.129 paf 673: 0, //no params
674: false/*fail_on_read_problem*/);
675: if(file.success && file.length/* ignore reads which are empty due to
1.72 paf 676: non-unary open+lockEX conflict with lockSH */) {
1.129 paf 677:
1.72 paf 678: Data_string_serialized_prolog& prolog=
1.129 paf 679: *reinterpret_cast<Data_string_serialized_prolog *>(file.str);
1.63 paf 680:
1.135 paf 681: String* body=new String;
1.72 paf 682: if(
1.129 paf 683: file.length>=sizeof(Data_string_serialized_prolog)
1.135 paf 684: && prolog.version==DATA_STRING_SERIALIZED_VERSION) {
685: if(body->deserialize(sizeof(Data_string_serialized_prolog), file.str, file.length)) {
686: result.body=body;
687: result.expired=prolog.expires <= now;
688: }
689: }
1.72 paf 690: }
1.63 paf 691:
1.135 paf 692: return result;
1.63 paf 693: }
1.129 paf 694: static time_t as_expires(Request& r, MethodParams& params,
1.79 paf 695: int index, time_t now) {
696: time_t result;
1.197 misha 697: if(Value* vdate=params[index].as(VDATE_TYPE))
1.129 paf 698: result=static_cast<VDate*>(vdate)->get_time();
1.79 paf 699: else
1.129 paf 700: result=now+(time_t)params.as_double(index, "lifespan must be date or number", r);
1.79 paf 701:
702: return result;
703: }
1.129 paf 704: static const String& as_file_spec(Request& r, MethodParams& params, int index) {
705: return r.absolute(params.as_string(index, "filespec must be string"));
1.79 paf 706: }
1.129 paf 707: static void _cache(Request& r, MethodParams& params) {
1.173 misha 708: if(params.count()==0) {
709: // ^cache[] -- return current expiration time
1.158 paf 710: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
711: if(!scope)
1.166 misha 712: throw Exception(PARSER_RUNTIME,
1.158 paf 713: 0,
714: "expire-time get without cache");
715: r.write_no_lang(*new VDate(scope->expires));
716: return;
717: }
718:
1.79 paf 719: time_t now=time(0);
720:
1.129 paf 721: if(params.count()==1) {
1.173 misha 722: // ^cache[filename] ^cache(seconds) ^cache[expires date]
1.129 paf 723: if(params[0].is_string()) { // filename?
1.79 paf 724: cache_delete(as_file_spec(r, params, 0));
725: return;
726: }
727:
728: // secods|expires date
1.135 paf 729: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
730: if(!scope)
1.166 misha 731: throw Exception(PARSER_RUNTIME,
1.129 paf 732: 0,
1.79 paf 733: "expire-time reducing instruction without cache");
734:
1.129 paf 735: time_t expires=as_expires(r, params, 0, now);
1.135 paf 736: if(expires < scope->expires)
737: scope->expires=expires;
1.79 paf 738:
739: return;
1.149 paf 740: } else if(params.count()<3)
1.166 misha 741: throw Exception(PARSER_RUNTIME,
1.149 paf 742: 0,
743: "invalid number of parameters");
1.63 paf 744:
745: // file_spec, expires, body code
1.172 misha 746: const String& file_spec=as_file_spec(r, params, 0);
1.65 paf 747:
1.141 paf 748: Cache_scope scope={as_expires(r, params, 1, now), 0};
1.135 paf 749:
750: Temp_hash_value<const String::Body, void*>
751: cache_scope_setter(r.classes_conf, cache_data_name, &scope);
1.136 paf 752: Value& body_code=params.as_junction(2, "body_code must be code");
753: Value* catch_code=0;
754: if(params.count()>3)
755: catch_code=¶ms.as_junction(3, "catch_code must be code");
1.63 paf 756:
1.168 misha 757: if(scope.expires>now) {
758: Cache_get_result cached=cache_get(r.charsets, file_spec, now);
1.69 paf 759:
1.168 misha 760: if(cached.body) { // have cached copy
1.174 misha 761: if(cached.expired) {
762: scope.body_from_disk=cached.body; // storing for user to retrive it with ^cache[]
763: } else {
764: // and it's not expired yet write it out
1.168 misha 765: r.write_assign_lang(*cached.body);
766: // happy with it
767: return;
768: }
769: }
770:
771: // no cached info or it's already expired
1.173 misha 772:
773: // trying to process it under lock and store result in file
1.174 misha 774: const String* processed_body=locked_process_and_cache_put(r, body_code, catch_code, scope, file_spec);
1.173 misha 775: if(processed_body){
1.174 misha 776: // write it out
777: r.write_assign_lang(*processed_body);
778: // happy with it
779: return;
1.173 misha 780: } else {
781: // we fail while get exclusive lock. nvm, we just execute body_code a bit later
1.174 misha 782: }
1.69 paf 783: } else {
1.79 paf 784: // instructed not to cache; forget cached copy
1.68 paf 785: cache_delete(file_spec);
1.69 paf 786: }
1.168 misha 787:
788: // process without cacheing
789: const String& processed_body=r.process_to_string(body_code);
790: // write it out
791: r.write_assign_lang(processed_body);
1.63 paf 792: }
793:
1.136 paf 794: static StringOrValue process_try_body_code(Request& r, Value* body_code) {
795: return r.process(*body_code);
796: }
1.129 paf 797: static void _try_operator(Request& r, MethodParams& params) {
798: Value& body_code=params.as_junction(0, "body_code must be code");
799: Value& catch_code=params.as_junction(1, "catch_code must be code");
1.179 misha 800: Value* finally_code=(params.count()==3) ? ¶ms.as_junction(2, "finally_code must be code") : 0;
801:
802: Try_catch_result result;
803: StringOrValue finally_result;
804: try{
805: result=try_catch(r,
806: process_try_body_code, &body_code,
807: &catch_code);
808: if(result.exception_should_be_handled)
809: throw Exception(PARSER_RUNTIME,
810: result.exception_should_be_handled,
811: "catch block must set $exception.handled to some boolean value, not string");
812: } catch(...){
813: if(finally_code)
814: finally_result=r.process(*finally_code);
815: rethrow;
816: }
1.74 paf 817:
1.179 misha 818: if(finally_code)
819: finally_result=r.process(*finally_code);
1.123 paf 820:
1.136 paf 821: // write out processed body_code or catch_code
822: r.write_pass_lang(result.processed_code);
1.179 misha 823:
824: // write out processed finally code
825: if(finally_code)
826: r.write_pass_lang(finally_result);
1.74 paf 827: }
828:
1.138 paf 829: static void _throw_operator(Request&, MethodParams& params) {
1.178 misha 830: if(params.count()==1 && !params[0].is_string()) {
1.129 paf 831: if(HashStringValue *hash=params[0].get_hash()) {
832: const char* type=0;
833: if(Value* value=hash->get(exception_type_part_name))
1.78 paf 834: type=value->as_string().cstr();
1.129 paf 835: const String* source=0;
836: if(Value* value=hash->get(exception_source_part_name))
1.74 paf 837: source=&value->as_string();
1.138 paf 838: const char* comment=0;
1.129 paf 839: if(Value* value=hash->get(exception_comment_part_name))
1.74 paf 840: comment=value->as_string().cstr();
841:
1.78 paf 842: throw Exception(type,
1.129 paf 843: source?source:0,
844: "%s", comment?comment:"");
1.74 paf 845: } else
1.166 misha 846: throw Exception(PARSER_RUNTIME,
1.129 paf 847: 0,
1.178 misha 848: "one-param version has hash or string param");
1.74 paf 849: } else {
1.129 paf 850: const char* type=params.as_string(0, "type must be string").cstr();
1.178 misha 851: const String* source=params.count()>1? ¶ms.as_string(1, "source must be string"):0;
852: const char* comment=params.count()>2? params.as_string(2, "comment must be string").cstr():0;
853: throw Exception(type, source, "%s", comment?comment:"");
1.74 paf 854: }
1.132 paf 855: }
1.129 paf 856:
1.150 paf 857: static void _sleep_operator(Request& r, MethodParams& params) {
858: double seconds=params.as_double(0, "seconds must be double", r);
1.206 moko 859: if(seconds>0)
860: pa_sleep((int)trunc(seconds), (int)trunc((seconds-trunc(seconds))*1000000));
1.150 paf 861: }
862:
1.129 paf 863: #if defined(WIN32) && defined(_DEBUG)
864: # define PA_BPT
1.138 paf 865: static void _bpt(Request&, MethodParams&) {
1.129 paf 866: _asm int 3;
867: }
868: #endif
869:
1.10 paf 870: // constructor
871:
1.129 paf 872: VClassMAIN::VClassMAIN(): VClass() {
873: set_name(*new String(MAIN_CLASS_NAME));
874:
875: #ifdef PA_BPT
876: // ^bpt[]
877: add_native_method("bpt", Method::CT_ANY, _bpt, 0, 0);
878: #endif
1.121 paf 879:
1.1 paf 880: // ^if(condition){code-when-true}
881: // ^if(condition){code-when-true}{code-when-false}
1.200 moko 882: // ^if(condition){code-when-true} (another condition){code-when-true} ... {code-when-false}
883: add_native_method("if", Method::CT_ANY, _if, 2, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 884:
1.194 misha 885: // ^untaint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
886: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 887:
1.194 misha 888: // ^taint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
889: add_native_method("taint", Method::CT_ANY, _taint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 890:
1.205 moko 891: // ^apply-taint[untaint lang][string]
892: add_native_method("apply-taint", Method::CT_ANY, _apply_taint, 1, 2, Method::CO_WITHOUT_FRAME);
893:
1.1 paf 894: // ^process[code]
1.146 paf 895: add_native_method("process", Method::CT_ANY, _process, 1, 3);
1.1 paf 896:
897: // ^rem{code}
1.185 misha 898: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 899:
900: // ^while(condition){code}
1.185 misha 901: add_native_method("while", Method::CT_ANY, _while, 2, 3, Method::CO_WITHOUT_FRAME);
1.1 paf 902:
903: // ^use[file]
1.10 paf 904: add_native_method("use", Method::CT_ANY, _use, 1, 1);
1.1 paf 905:
1.164 paf 906: // ^break[]
1.185 misha 907: add_native_method("break", Method::CT_ANY, _break, 0, 0, Method::CO_WITHOUT_FRAME);
908:
1.164 paf 909: // ^continue[]
1.185 misha 910: add_native_method("continue", Method::CT_ANY, _continue, 0, 0, Method::CO_WITHOUT_FRAME);
911:
1.54 paf 912: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.185 misha 913: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1, Method::CO_WITHOUT_WCONTEXT);
1.1 paf 914:
915: // ^eval(expr)
916: // ^eval(expr)[format]
1.185 misha 917: add_native_method("eval", Method::CT_ANY, _eval, 1, 2, Method::CO_WITHOUT_FRAME);
1.52 parser 918:
1.1 paf 919: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 920: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
921:
1.63 paf 922:
1.136 paf 923: // ^cache[file_spec](time){code}[{catch code}] time=0 no cache
1.65 paf 924: // ^cache[file_spec] delete cache
1.161 paf 925: // ^cache[] get current expiration time
926: add_native_method("cache", Method::CT_ANY, _cache, 0, 4);
1.63 paf 927:
1.28 parser 928: // switch
929:
930: // ^switch[value]{cases}
1.185 misha 931: add_native_method("switch", Method::CT_ANY, _switch, 2, 2, Method::CO_WITHOUT_FRAME);
1.28 parser 932:
933: // ^case[value]{code}
1.185 misha 934: add_native_method("case", Method::CT_ANY, _case, 2, 10000, Method::CO_WITHOUT_FRAME);
1.74 paf 935:
936: // try-catch
937:
938: // ^try{code}{catch code}
1.185 misha 939: add_native_method("try", Method::CT_ANY, _try_operator, 2, 3, Method::CO_WITHOUT_FRAME);
1.74 paf 940: // ^throw[$exception hash]
941: // ^throw[type;source;comment]
942: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
943:
1.150 paf 944: add_native_method("sleep", Method::CT_ANY, _sleep_operator, 1, 1);
1.10 paf 945: }
1.11 paf 946:
947: // constructor & configurator
1.1 paf 948:
1.129 paf 949: VStateless_class& VClassMAIN_create() {
950: return *new VClassMAIN;
1.1 paf 951: }
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