Annotation of parser3/src/classes/op.C, revision 1.215
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:
1.215 ! moko 21: volatile const char * IDENT_OP_C="$Id: op.C,v 1.214 2013/07/23 14:29:01 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]));
1.215 ! moko 438: Temp_hash_value<HashString<void*>, void*> switch_data_setter(&r.classes_conf, switch_data_name, data);
1.28 parser 439:
1.129 paf 440: Value& cases_code=params.as_junction(1, "switch cases must be code");
1.82 paf 441: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
442: // because of stacked WWrapper used there as wcontext
1.84 paf 443: r.process(cases_code, true/*intercept_string*/);
1.147 paf 444: if(Value* selected_code=data->found? data->found: data->_default)
1.107 paf 445: r.write_pass_lang(r.process(*selected_code));
1.28 parser 446: }
447:
1.129 paf 448: static void _case(Request& r, MethodParams& params) {
449: Switch_data* data=static_cast<Switch_data*>(r.classes_conf.get(switch_data_name));
1.38 parser 450: if(!data)
1.166 misha 451: throw Exception(PARSER_RUNTIME,
1.129 paf 452: 0,
1.38 parser 453: "without switch");
1.28 parser 454:
1.181 misha 455: if(data->found) // matches already was found
456: return;
457:
1.129 paf 458: int count=params.count();
1.184 misha 459: Value* code=¶ms.as_expression(--count, "case result must be code");
460:
461: #ifdef USE_DESTRUCTORS
462: Junction *j=code->get_junction();
463: if (j){
464: code=new VJunction(j->self,j->method,j->method_frame,j->rcontext,j->wcontext,j->code);
465: if (j->wcontext) j->wcontext->attach_junction((VJunction *)code);
466: }
467: #endif
1.83 paf 468:
1.181 misha 469: for(int i=0; i<count; i++){
1.129 paf 470: Value& value=r.process_to_value(params[i]);
1.28 parser 471:
1.181 misha 472: if(value.is_string() && value.as_string() == CASE_DEFAULT_VALUE){
1.184 misha 473: data->_default=code;
1.181 misha 474: continue;
1.28 parser 475: }
476:
477: bool matches;
1.181 misha 478: if(data->searching_string)
479: matches=(*data->searching_string) == value.as_string();
1.207 misha 480: else if(data->searching_bool || value.is_bool())
481: matches=(data->searching_double != 0) == value.as_bool();
1.28 parser 482: else
1.181 misha 483: matches=data->searching_double == value.as_double();
1.82 paf 484:
1.181 misha 485: if(matches){
1.184 misha 486: data->found=code;
1.28 parser 487: break;
488: }
489: }
490: }
1.136 paf 491: #ifndef DOXYGEN
492: struct Try_catch_result {
493: StringOrValue processed_code;
494: const String* exception_should_be_handled;
495:
496: Try_catch_result(): exception_should_be_handled(0) {}
497: };
498: #endif
499:
500: /// used by ^try and ^cache, @returns $exception.handled[string] if any
501: template<class I>
502: static Try_catch_result try_catch(Request& r,
503: StringOrValue body_code(Request&, I), I info,
1.179 misha 504: Value* catch_code,
505: bool could_be_handled_by_caller=false)
1.136 paf 506: {
507: Try_catch_result result;
1.179 misha 508:
1.136 paf 509: if(!catch_code) {
510: result.processed_code=body_code(r, info);
511: return result;
512: }
513:
514: // taking snapshot of try-context
515: Request_context_saver try_context(r);
516: try {
517: result.processed_code=body_code(r, info);
518: } catch(const Exception& e) {
519: Request_context_saver throw_context(r); // taking snapshot of throw-context [stack trace contains error]
520: Request::Exception_details details=r.get_details(e);
521: try_context.restore(); // restoring try-context to perform catch-code
522:
523: Junction* junction=catch_code->get_junction();
524: Value* method_frame=junction->method_frame;
1.197 misha 525: Value* saved_exception_var_value=method_frame->get_element(exception_var_name);
1.154 paf 526: VMethodFrame& frame=*junction->method_frame;
1.197 misha 527: frame.put_element(exception_var_name, &details.vhash, false);
1.179 misha 528:
1.136 paf 529: result.processed_code=r.process(*catch_code);
530:
531: // retriving $exception.handled, restoring $exception var
532: Value* vhandled=details.vhash.hash().get(exception_handled_part_name);
1.197 misha 533: frame.put_element(exception_var_name, saved_exception_var_value, false);
1.136 paf 534:
535: bool bhandled=false;
536: if(vhandled) {
537: if(vhandled->is_string()) { // not simple $exception.handled(1/0)?
1.160 paf 538: if(could_be_handled_by_caller) { // and we can possibly handle it
539: result.exception_should_be_handled=vhandled->get_string(); // considering 'recovered' and let the caller recover
540: return result;
541: }
542:
543: bhandled=false;
544: } else
1.179 misha 545: bhandled=vhandled->as_bool();
1.136 paf 546: }
547:
548: if(!bhandled) {
549: throw_context.restore(); // restoring throw-context [exception were not handled]
550: rethrow;
551: }
552: }
1.179 misha 553:
1.136 paf 554: return result;
555: }
1.28 parser 556:
1.63 paf 557: // cache--
558:
559: // consts
560:
1.152 paf 561: const int DATA_STRING_SERIALIZED_VERSION=0x0006;
1.63 paf 562:
563: // helper types
564:
565: #ifndef DOXYGEN
566: struct Data_string_serialized_prolog {
567: int version;
1.79 paf 568: time_t expires;
1.63 paf 569: };
570: #endif
571:
1.68 paf 572: void cache_delete(const String& file_spec) {
1.167 misha 573: file_delete(file_spec, false/*fail_on_problem*/);
1.63 paf 574: }
1.69 paf 575:
576: #ifndef DOXYGEN
1.135 paf 577: struct Cache_scope {
1.129 paf 578: public:
1.79 paf 579: time_t expires;
1.135 paf 580: const String* body_from_disk;
1.79 paf 581: };
1.69 paf 582: struct Locked_process_and_cache_put_action_info {
583: Request *r;
1.136 paf 584: Cache_scope *scope;
1.167 misha 585: Value* body_code;
586: Value* catch_code;
1.136 paf 587: const String* processed_code;
1.69 paf 588: };
589: #endif
1.136 paf 590:
591:
592:
593: static StringOrValue process_cache_body_code(Request& r, Value* body_code) {
1.153 paf 594: return StringOrValue(r.process_to_string(*body_code));
1.136 paf 595: }
596:
1.129 paf 597: /* @todo maybe network order worth spending some effort?
598: don't bothering myself with network byte order,
599: am not planning to be able to move resulting file across platforms
600: */
1.69 paf 601: static void locked_process_and_cache_put_action(int f, void *context) {
602: Locked_process_and_cache_put_action_info& info=
603: *static_cast<Locked_process_and_cache_put_action_info *>(context);
1.129 paf 604:
1.160 paf 605: const String* body_from_disk=info.scope->body_from_disk;
1.69 paf 606: // body->process
1.136 paf 607: Try_catch_result result=try_catch(*info.r,
608: process_cache_body_code, info.body_code,
1.160 paf 609: info.catch_code, body_from_disk!=0 /*we have something old=we can handle=recover later*/);
1.136 paf 610:
611: if(result.exception_should_be_handled) {
612: if(*result.exception_should_be_handled==CACHE_EXCEPTION_HANDLED_CACHE_NAME) {
1.160 paf 613: assert(body_from_disk);
614: info.processed_code=body_from_disk;
1.136 paf 615: } else
1.166 misha 616: throw Exception(PARSER_RUNTIME,
1.136 paf 617: result.exception_should_be_handled,
618: "$"EXCEPTION_VAR_NAME"."EXCEPTION_HANDLED_PART_NAME" value must be "
619: "either boolean or string '"CACHE_EXCEPTION_HANDLED_CACHE_NAME"'");
620: } else
621: info.processed_code=&result.processed_code.as_string();
1.69 paf 622:
1.79 paf 623: // expiration time not spoiled by ^cache(0) or something?
1.136 paf 624: if(info.scope->expires > time(0)) {
1.79 paf 625: // string -serialize> buffer
1.136 paf 626: String::Cm serialized=info.processed_code->serialize(
1.129 paf 627: sizeof(Data_string_serialized_prolog));
1.79 paf 628: Data_string_serialized_prolog& prolog=
1.129 paf 629: *reinterpret_cast<Data_string_serialized_prolog *>(serialized.str);
1.79 paf 630: prolog.version=DATA_STRING_SERIALIZED_VERSION;
1.136 paf 631: prolog.expires=info.scope->expires;
1.79 paf 632:
633: // buffer -write> file
1.129 paf 634: write(f, serialized.str, serialized.length);
1.79 paf 635: } else // expired!
1.136 paf 636: info.scope->expires=0; // flag it so that could be easily checked by caller
1.69 paf 637: }
1.129 paf 638: const String* locked_process_and_cache_put(Request& r,
1.128 paf 639: Value& body_code,
1.136 paf 640: Value* catch_code,
641: Cache_scope& scope,
642: const String& file_spec)
643: {
1.140 paf 644: Locked_process_and_cache_put_action_info info={&r, &scope, &body_code, catch_code, 0};
1.69 paf 645:
1.129 paf 646: const String* result=file_write_action_under_lock(
1.69 paf 647: file_spec,
1.168 misha 648: "cache_put",
649: locked_process_and_cache_put_action,
650: &info,
1.69 paf 651: false/*as_text*/,
652: false/*do_append*/,
1.173 misha 653: false/*block == don't wait till other thread release lock*/,
654: false/*dun throw exception if lock failed*/) ? info.processed_code: 0;
1.168 misha 655:
1.100 paf 656: time_t now=time(0);
1.136 paf 657: if(scope.expires<=now)
1.79 paf 658: cache_delete(file_spec);
659: return result;
1.63 paf 660: }
1.137 paf 661: #ifndef DOXYGEN
1.135 paf 662: struct Cache_get_result {
663: const String* body;
664: bool expired;
1.137 paf 665: };
666: #endif
667: static Cache_get_result cache_get(Request_charsets& charsets, const String& file_spec, time_t now) {
1.140 paf 668: Cache_get_result result={0, false};
1.135 paf 669:
1.129 paf 670: File_read_result file=file_read(charsets, file_spec,
1.63 paf 671: false/*as_text*/,
1.129 paf 672: 0, //no params
673: false/*fail_on_read_problem*/);
674: if(file.success && file.length/* ignore reads which are empty due to
1.72 paf 675: non-unary open+lockEX conflict with lockSH */) {
1.129 paf 676:
1.72 paf 677: Data_string_serialized_prolog& prolog=
1.129 paf 678: *reinterpret_cast<Data_string_serialized_prolog *>(file.str);
1.63 paf 679:
1.135 paf 680: String* body=new String;
1.72 paf 681: if(
1.129 paf 682: file.length>=sizeof(Data_string_serialized_prolog)
1.135 paf 683: && prolog.version==DATA_STRING_SERIALIZED_VERSION) {
684: if(body->deserialize(sizeof(Data_string_serialized_prolog), file.str, file.length)) {
685: result.body=body;
686: result.expired=prolog.expires <= now;
687: }
688: }
1.72 paf 689: }
1.63 paf 690:
1.135 paf 691: return result;
1.63 paf 692: }
1.129 paf 693: static time_t as_expires(Request& r, MethodParams& params,
1.79 paf 694: int index, time_t now) {
695: time_t result;
1.197 misha 696: if(Value* vdate=params[index].as(VDATE_TYPE))
1.129 paf 697: result=static_cast<VDate*>(vdate)->get_time();
1.79 paf 698: else
1.129 paf 699: result=now+(time_t)params.as_double(index, "lifespan must be date or number", r);
1.79 paf 700:
701: return result;
702: }
1.129 paf 703: static const String& as_file_spec(Request& r, MethodParams& params, int index) {
704: return r.absolute(params.as_string(index, "filespec must be string"));
1.79 paf 705: }
1.129 paf 706: static void _cache(Request& r, MethodParams& params) {
1.173 misha 707: if(params.count()==0) {
708: // ^cache[] -- return current expiration time
1.158 paf 709: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
710: if(!scope)
1.166 misha 711: throw Exception(PARSER_RUNTIME,
1.158 paf 712: 0,
713: "expire-time get without cache");
714: r.write_no_lang(*new VDate(scope->expires));
715: return;
716: }
717:
1.79 paf 718: time_t now=time(0);
719:
1.129 paf 720: if(params.count()==1) {
1.173 misha 721: // ^cache[filename] ^cache(seconds) ^cache[expires date]
1.129 paf 722: if(params[0].is_string()) { // filename?
1.79 paf 723: cache_delete(as_file_spec(r, params, 0));
724: return;
725: }
726:
727: // secods|expires date
1.135 paf 728: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
729: if(!scope)
1.166 misha 730: throw Exception(PARSER_RUNTIME,
1.129 paf 731: 0,
1.79 paf 732: "expire-time reducing instruction without cache");
733:
1.129 paf 734: time_t expires=as_expires(r, params, 0, now);
1.135 paf 735: if(expires < scope->expires)
736: scope->expires=expires;
1.79 paf 737:
738: return;
1.149 paf 739: } else if(params.count()<3)
1.166 misha 740: throw Exception(PARSER_RUNTIME,
1.149 paf 741: 0,
742: "invalid number of parameters");
1.63 paf 743:
744: // file_spec, expires, body code
1.172 misha 745: const String& file_spec=as_file_spec(r, params, 0);
1.65 paf 746:
1.141 paf 747: Cache_scope scope={as_expires(r, params, 1, now), 0};
1.135 paf 748:
1.215 ! moko 749: Temp_hash_value<HashString<void*>, void*> cache_scope_setter(&r.classes_conf, cache_data_name, &scope);
1.136 paf 750: Value& body_code=params.as_junction(2, "body_code must be code");
751: Value* catch_code=0;
752: if(params.count()>3)
753: catch_code=¶ms.as_junction(3, "catch_code must be code");
1.63 paf 754:
1.168 misha 755: if(scope.expires>now) {
756: Cache_get_result cached=cache_get(r.charsets, file_spec, now);
1.69 paf 757:
1.168 misha 758: if(cached.body) { // have cached copy
1.174 misha 759: if(cached.expired) {
760: scope.body_from_disk=cached.body; // storing for user to retrive it with ^cache[]
761: } else {
762: // and it's not expired yet write it out
1.168 misha 763: r.write_assign_lang(*cached.body);
764: // happy with it
765: return;
766: }
767: }
768:
769: // no cached info or it's already expired
1.173 misha 770:
771: // trying to process it under lock and store result in file
1.174 misha 772: const String* processed_body=locked_process_and_cache_put(r, body_code, catch_code, scope, file_spec);
1.173 misha 773: if(processed_body){
1.174 misha 774: // write it out
775: r.write_assign_lang(*processed_body);
776: // happy with it
777: return;
1.173 misha 778: } else {
779: // we fail while get exclusive lock. nvm, we just execute body_code a bit later
1.174 misha 780: }
1.69 paf 781: } else {
1.79 paf 782: // instructed not to cache; forget cached copy
1.68 paf 783: cache_delete(file_spec);
1.69 paf 784: }
1.168 misha 785:
786: // process without cacheing
787: const String& processed_body=r.process_to_string(body_code);
788: // write it out
789: r.write_assign_lang(processed_body);
1.63 paf 790: }
791:
1.136 paf 792: static StringOrValue process_try_body_code(Request& r, Value* body_code) {
793: return r.process(*body_code);
794: }
1.129 paf 795: static void _try_operator(Request& r, MethodParams& params) {
796: Value& body_code=params.as_junction(0, "body_code must be code");
797: Value& catch_code=params.as_junction(1, "catch_code must be code");
1.179 misha 798: Value* finally_code=(params.count()==3) ? ¶ms.as_junction(2, "finally_code must be code") : 0;
799:
800: Try_catch_result result;
801: StringOrValue finally_result;
802: try{
803: result=try_catch(r,
804: process_try_body_code, &body_code,
805: &catch_code);
806: if(result.exception_should_be_handled)
807: throw Exception(PARSER_RUNTIME,
808: result.exception_should_be_handled,
809: "catch block must set $exception.handled to some boolean value, not string");
810: } catch(...){
811: if(finally_code)
812: finally_result=r.process(*finally_code);
813: rethrow;
814: }
1.74 paf 815:
1.179 misha 816: if(finally_code)
817: finally_result=r.process(*finally_code);
1.123 paf 818:
1.136 paf 819: // write out processed body_code or catch_code
820: r.write_pass_lang(result.processed_code);
1.179 misha 821:
822: // write out processed finally code
823: if(finally_code)
824: r.write_pass_lang(finally_result);
1.74 paf 825: }
826:
1.138 paf 827: static void _throw_operator(Request&, MethodParams& params) {
1.178 misha 828: if(params.count()==1 && !params[0].is_string()) {
1.129 paf 829: if(HashStringValue *hash=params[0].get_hash()) {
830: const char* type=0;
831: if(Value* value=hash->get(exception_type_part_name))
1.78 paf 832: type=value->as_string().cstr();
1.129 paf 833: const String* source=0;
834: if(Value* value=hash->get(exception_source_part_name))
1.74 paf 835: source=&value->as_string();
1.138 paf 836: const char* comment=0;
1.129 paf 837: if(Value* value=hash->get(exception_comment_part_name))
1.74 paf 838: comment=value->as_string().cstr();
839:
1.78 paf 840: throw Exception(type,
1.129 paf 841: source?source:0,
842: "%s", comment?comment:"");
1.74 paf 843: } else
1.166 misha 844: throw Exception(PARSER_RUNTIME,
1.129 paf 845: 0,
1.178 misha 846: "one-param version has hash or string param");
1.74 paf 847: } else {
1.129 paf 848: const char* type=params.as_string(0, "type must be string").cstr();
1.178 misha 849: const String* source=params.count()>1? ¶ms.as_string(1, "source must be string"):0;
850: const char* comment=params.count()>2? params.as_string(2, "comment must be string").cstr():0;
851: throw Exception(type, source, "%s", comment?comment:"");
1.74 paf 852: }
1.132 paf 853: }
1.129 paf 854:
1.150 paf 855: static void _sleep_operator(Request& r, MethodParams& params) {
856: double seconds=params.as_double(0, "seconds must be double", r);
1.206 moko 857: if(seconds>0)
858: pa_sleep((int)trunc(seconds), (int)trunc((seconds-trunc(seconds))*1000000));
1.150 paf 859: }
860:
1.129 paf 861: #if defined(WIN32) && defined(_DEBUG)
862: # define PA_BPT
1.138 paf 863: static void _bpt(Request&, MethodParams&) {
1.129 paf 864: _asm int 3;
865: }
866: #endif
867:
1.10 paf 868: // constructor
869:
1.129 paf 870: VClassMAIN::VClassMAIN(): VClass() {
871: set_name(*new String(MAIN_CLASS_NAME));
872:
873: #ifdef PA_BPT
874: // ^bpt[]
875: add_native_method("bpt", Method::CT_ANY, _bpt, 0, 0);
876: #endif
1.121 paf 877:
1.1 paf 878: // ^if(condition){code-when-true}
879: // ^if(condition){code-when-true}{code-when-false}
1.200 moko 880: // ^if(condition){code-when-true} (another condition){code-when-true} ... {code-when-false}
881: add_native_method("if", Method::CT_ANY, _if, 2, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 882:
1.194 misha 883: // ^untaint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
884: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 885:
1.194 misha 886: // ^taint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
887: add_native_method("taint", Method::CT_ANY, _taint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 888:
1.205 moko 889: // ^apply-taint[untaint lang][string]
890: add_native_method("apply-taint", Method::CT_ANY, _apply_taint, 1, 2, Method::CO_WITHOUT_FRAME);
891:
1.1 paf 892: // ^process[code]
1.146 paf 893: add_native_method("process", Method::CT_ANY, _process, 1, 3);
1.1 paf 894:
895: // ^rem{code}
1.185 misha 896: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 897:
898: // ^while(condition){code}
1.185 misha 899: add_native_method("while", Method::CT_ANY, _while, 2, 3, Method::CO_WITHOUT_FRAME);
1.1 paf 900:
901: // ^use[file]
1.10 paf 902: add_native_method("use", Method::CT_ANY, _use, 1, 1);
1.1 paf 903:
1.164 paf 904: // ^break[]
1.185 misha 905: add_native_method("break", Method::CT_ANY, _break, 0, 0, Method::CO_WITHOUT_FRAME);
906:
1.164 paf 907: // ^continue[]
1.185 misha 908: add_native_method("continue", Method::CT_ANY, _continue, 0, 0, Method::CO_WITHOUT_FRAME);
909:
1.54 paf 910: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.185 misha 911: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1, Method::CO_WITHOUT_WCONTEXT);
1.1 paf 912:
913: // ^eval(expr)
914: // ^eval(expr)[format]
1.185 misha 915: add_native_method("eval", Method::CT_ANY, _eval, 1, 2, Method::CO_WITHOUT_FRAME);
1.52 parser 916:
1.1 paf 917: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 918: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
919:
1.63 paf 920:
1.136 paf 921: // ^cache[file_spec](time){code}[{catch code}] time=0 no cache
1.65 paf 922: // ^cache[file_spec] delete cache
1.161 paf 923: // ^cache[] get current expiration time
924: add_native_method("cache", Method::CT_ANY, _cache, 0, 4);
1.63 paf 925:
1.28 parser 926: // switch
927:
928: // ^switch[value]{cases}
1.185 misha 929: add_native_method("switch", Method::CT_ANY, _switch, 2, 2, Method::CO_WITHOUT_FRAME);
1.28 parser 930:
931: // ^case[value]{code}
1.185 misha 932: add_native_method("case", Method::CT_ANY, _case, 2, 10000, Method::CO_WITHOUT_FRAME);
1.74 paf 933:
934: // try-catch
935:
936: // ^try{code}{catch code}
1.185 misha 937: add_native_method("try", Method::CT_ANY, _try_operator, 2, 3, Method::CO_WITHOUT_FRAME);
1.74 paf 938: // ^throw[$exception hash]
939: // ^throw[type;source;comment]
940: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
941:
1.150 paf 942: add_native_method("sleep", Method::CT_ANY, _sleep_operator, 1, 1);
1.10 paf 943: }
1.11 paf 944:
945: // constructor & configurator
1.1 paf 946:
1.129 paf 947: VStateless_class& VClassMAIN_create() {
948: return *new VClassMAIN;
1.1 paf 949: }
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