Annotation of parser3/src/classes/op.C, revision 1.225
1.1 paf 1: /** @file
1.9 paf 2: Parser: parser @b operators.
1.1 paf 3:
1.224 moko 4: Copyright (c) 2001-2015 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:
1.225 ! moko 21: volatile const char * IDENT_OP_C="$Id: op.C,v 1.224 2015/10/26 01:21:54 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"
1.11 paf 30:
1.10 paf 31: // class
32:
1.113 paf 33: class VClassMAIN: public VClass {
1.10 paf 34: public:
1.129 paf 35: VClassMAIN();
1.10 paf 36: };
37:
1.129 paf 38: // defines for statics
39:
40: #define SWITCH_DATA_NAME "SWITCH-DATA"
41: #define CACHE_DATA_NAME "CACHE-DATA"
1.164 paf 42:
1.129 paf 43: #define EXCEPTION_VAR_NAME "exception"
44:
45: // statics
46:
47: //^switch ^case
48: static const String switch_data_name(SWITCH_DATA_NAME);
49: //^cache
50: static const String cache_data_name(CACHE_DATA_NAME);
51:
52: static const String exception_var_name(EXCEPTION_VAR_NAME);
53:
1.164 paf 54:
1.136 paf 55: // local defines
56:
57: #define CACHE_EXCEPTION_HANDLED_CACHE_NAME "cache"
58:
1.129 paf 59: // helpers
60:
1.187 misha 61: class Untaint_lang_name2enum: public HashString<String::Language> {
1.129 paf 62: public:
63: Untaint_lang_name2enum() {
1.223 moko 64: #define ULN(name, LANG) put(name, (value_type)(String::L_##LANG));
1.198 misha 65: ULN("clean", CLEAN);
1.129 paf 66: ULN("as-is", AS_IS);
67: ULN("optimized-as-is", AS_IS|String::L_OPTIMIZE_BIT);
68: ULN("file-spec", FILE_SPEC);
69: ULN("http-header", HTTP_HEADER);
70: ULN("mail-header", MAIL_HEADER);
71: ULN("uri", URI);
72: ULN("sql", SQL);
73: ULN("js", JS);
74: ULN("xml", XML);
75: ULN("optimized-xml", XML|String::L_OPTIMIZE_BIT);
76: ULN("html", HTML);
77: ULN("optimized-html", HTML|String::L_OPTIMIZE_BIT);
1.159 paf 78: ULN("regex", REGEX);
1.193 misha 79: ULN("parser-code", PARSER_CODE);
1.204 misha 80: ULN("json", JSON);
1.129 paf 81: #undef ULN
82: }
83: } untaint_lang_name2enum;
84:
1.10 paf 85: // methods
86:
1.129 paf 87: static void _if(Request& r, MethodParams& params) {
1.200 moko 88: size_t max_param=params.count()-1;
89: size_t i=0;
90: do {
91: bool condition=params.as_bool(i, "condition must be expression", r);
92: if(condition) {
93: r.process_write(*params.get(i+1));
94: return;
95: }
96: i+=2;
97: } while (i < max_param);
98:
99: if(i == max_param)
100: r.process_write(*params.get(i));
1.1 paf 101: }
102:
1.210 moko 103: String::Language get_untaint_lang(const String& lang_name){
1.175 misha 104: String::Language lang=untaint_lang_name2enum.get(lang_name);
105: if(!lang)
1.210 moko 106: throw Exception(PARSER_RUNTIME, &lang_name, "invalid taint language");
1.175 misha 107: return lang;
108: }
109:
1.129 paf 110: static void _untaint(Request& r, MethodParams& params) {
111: String::Language lang;
112: if(params.count()==1)
1.175 misha 113: lang=String::L_AS_IS; // mark as simply 'as-is'. useful in html from sql
114: else
1.210 moko 115: lang=get_untaint_lang(params.as_string(0, "lang must be string"));
1.1 paf 116:
117: {
1.129 paf 118: Value& vbody=params.as_junction(params.count()-1, "body must be code");
1.1 paf 119:
1.191 misha 120: Temp_lang temp_lang(r, lang); // set temporarily specified ^untaint[language;
121: StringOrValue result=r.process(vbody); // process marking tainted with that lang
1.188 misha 122: r.write_assign_lang(result);
1.1 paf 123: }
124: }
125:
1.129 paf 126: static void _taint(Request& r, MethodParams& params) {
127: String::Language lang;
128: if(params.count()==1)
1.175 misha 129: lang=String::L_TAINTED; // mark as simply 'tainted'. useful in table:create
130: else
1.210 moko 131: lang=get_untaint_lang(params.as_string(0, "lang must be string"));
1.1 paf 132:
133: {
1.129 paf 134: Value& vbody=params.as_no_junction(params.count()-1, "body must not be code");
1.1 paf 135:
1.191 misha 136: String result(vbody.as_string(), lang); // force result language to specified
1.188 misha 137: r.write_assign_lang(result);
1.1 paf 138: }
139: }
140:
1.205 moko 141: static void _apply_taint(Request& r, MethodParams& params) {
1.210 moko 142: String::Language lang=params.count()==1 ? String::L_AS_IS : get_untaint_lang(params.as_string(0, "lang must be string"));
1.205 moko 143: const String &sbody=params.as_string(params.count()-1, "body must be string");
1.213 moko 144: String::Body result_body=sbody.cstr_to_string_body_untaint(lang, r.connection(false), &r.charsets);
1.205 moko 145: r.write_pass_lang(*new String(result_body, String::L_AS_IS));
146: }
147:
1.129 paf 148: static void _process(Request& r, MethodParams& params) {
149: Method* main_method;
150:
151: size_t index=0;
152: Value* target_self;
153: Value& maybe_target_self=params[index];
154: if(maybe_target_self.get_string() || maybe_target_self.get_junction())
155: target_self=&r.get_method_frame()->caller()->self();
156: else {
157: target_self=&maybe_target_self; index++;
158: }
159:
1.1 paf 160: {
1.197 misha 161: VStateless_class *target_class=target_self->get_class();
1.116 paf 162: if(!target_class)
1.166 misha 163: throw Exception(PARSER_RUNTIME,
1.129 paf 164: 0,
1.116 paf 165: "no target class");
1.114 paf 166:
1.73 paf 167: // temporary remove language change
1.192 misha 168: Temp_lang temp_lang(r, String::L_PARSER_CODE);
1.1 paf 169: // temporary zero @main so to maybe-replace it in processed code
1.129 paf 170: Temp_method temp_method_main(*target_class, main_method_name, 0);
1.1 paf 171: // temporary zero @auto so it wouldn't be auto-called in Request::use_buf
1.129 paf 172: Temp_method temp_method_auto(*target_class, auto_method_name, 0);
173:
174: const String* main_alias=0;
1.146 paf 175: const String* file_alias=0;
176: int line_no_alias_offset=0;
1.216 moko 177: bool allow_class_replace=false;
1.211 misha 178:
179: size_t options_index=index+1;
180: if(options_index<params.count())
181: if(HashStringValue* options=params.as_hash(options_index)) {
1.216 moko 182:
1.211 misha 183: int valid_options=0;
1.216 moko 184: for(HashStringValue::Iterator i(*options); i; i.next() ){
185:
186: String::Body key=i.key();
187: Value* value=i.value();
188:
189: if(key == "main") {
190: valid_options++;
191: main_alias=&value->as_string();
192: } else if(key == "file") {
193: valid_options++;
194: file_alias=&value->as_string();
195: } else if(key == "lineno") {
196: valid_options++;
197: line_no_alias_offset=value->as_int();
198: } else if(key == "replace") {
199: valid_options++;
200: allow_class_replace=r.process_to_value(*value).as_bool();
201: }
1.211 misha 202: }
1.216 moko 203:
1.211 misha 204: if(valid_options!=options->count())
205: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
1.146 paf 206: }
1.129 paf 207:
1.146 paf 208: uint processe_file_no=file_alias?
209: r.register_file(r.absolute(*file_alias))
210: : pseudo_file_no__process;
211: // process...{string}
212: Value& vjunction=params.as_junction(index, "body must be code");
213: // evaluate source to process
214: const String& source=r.process_to_string(vjunction);
1.216 moko 215:
216: Temp_class_replace class_replace(r, allow_class_replace);
217:
1.146 paf 218: r.use_buf(*target_class,
1.190 misha 219: source.untaint_cstr(String::L_AS_IS, r.connection(false)),
1.146 paf 220: main_alias,
221: processe_file_no,
222: line_no_alias_offset);
1.1 paf 223:
1.73 paf 224: // main_method
1.129 paf 225: main_method=target_class->get_method(main_method_name);
1.73 paf 226: }
227: // after restoring current-request-lang
228: // maybe-execute @main[]
229: if(main_method) {
1.202 moko 230: VMethodFrame frame(*main_method, r.get_method_frame()->caller(), *target_self);
231: frame.empty_params();
1.203 moko 232: r.op_call(frame);
233: r.write_pass_lang(frame.result());
1.1 paf 234: }
235: }
236:
1.138 paf 237: static void _rem(Request&, MethodParams& params) {
1.129 paf 238: params.as_junction(0, "body must be code");
1.1 paf 239: }
240:
1.129 paf 241: static void _while(Request& r, MethodParams& params) {
1.196 misha 242: InCycle temp(r);
1.164 paf 243:
1.170 misha 244: Value& vcondition=params.as_expression(0, "condition must be number, bool or expression");
245:
1.162 paf 246: Value& body_code=params.as_junction(1, "body must be code");
247: Value* delim_maybe_code=params.count()>2?¶ms[2]:0;
1.1 paf 248:
249: // while...
250: int endless_loop_count=0;
1.186 misha 251: if(delim_maybe_code){ // delimiter set
1.185 misha 252: bool need_delim=false;
253: while(true) {
254: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
255: throw Exception(PARSER_RUNTIME,
256: 0,
257: "endless loop detected");
258:
259: if(!r.process_to_value(vcondition, false/*don't intercept string*/).as_bool())
260: break;
1.1 paf 261:
1.185 misha 262: StringOrValue sv_processed=r.process(body_code);
263: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 misha 264:
1.185 misha 265: const String* s_processed=sv_processed.get_string();
1.186 misha 266: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 267: if(need_delim) // need delim & iteration produced string?
268: r.write_pass_lang(r.process(*delim_maybe_code));
269: else
270: need_delim=true;
271: }
272: r.write_pass_lang(sv_processed);
1.1 paf 273:
1.185 misha 274: if(lskip==Request::SKIP_BREAK)
275: break;
1.162 paf 276: }
1.185 misha 277: } else {
278: while(true) {
279: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
280: throw Exception(PARSER_RUNTIME,
281: 0,
282: "endless loop detected");
283:
284: if(!r.process_to_value(vcondition, false/*don't intercept string*/).as_bool())
285: break;
1.164 paf 286:
1.185 misha 287: r.process_write(body_code);
288: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
289:
290: if(lskip==Request::SKIP_BREAK)
291: break;
292: }
1.1 paf 293: }
294: }
295:
1.129 paf 296: static void _use(Request& r, MethodParams& params) {
1.171 misha 297: Value& vfile=params.as_no_junction(0, FILE_NAME_MUST_NOT_BE_CODE);
1.199 misha 298:
1.216 moko 299: bool allow_class_replace=false;
300:
301: if(params.count()==2)
302: if(HashStringValue* options=params.as_hash(1)) {
303: int valid_options=0;
304: for(HashStringValue::Iterator i(*options); i; i.next() ){
305:
306: String::Body key=i.key();
307: Value* value=i.value();
308:
309: if(key == "replace") {
310: valid_options++;
311: allow_class_replace=r.process_to_value(*value).as_bool();
312: }
313:
314: if(valid_options!=options->count())
315: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
316: }
317: }
318:
319: Temp_class_replace class_replace(r, allow_class_replace);
320:
1.199 misha 321: // _use could be called from the parser3 method only, so caller is always defined
1.202 moko 322: r.use_file(r.main_class, vfile.as_string(), r.get_method_filename(&r.get_method_frame()->caller()->method));
1.1 paf 323: }
324:
1.164 paf 325: static void set_skip(Request& r, Request::Skip askip) {
1.196 misha 326: if(!r.get_in_cycle())
1.208 misha 327: throw Exception(askip==Request::SKIP_BREAK?"parser.break":"parser.continue",
1.164 paf 328: 0,
329: "without cycle");
330:
331: r.set_skip(askip);
332: }
333:
334: static void _break(Request& r, MethodParams&) {
335: set_skip(r, Request::SKIP_BREAK);
336: }
337:
338: static void _continue(Request& r, MethodParams&) {
339: set_skip(r, Request::SKIP_CONTINUE);
340: }
341:
1.129 paf 342: static void _for(Request& r, MethodParams& params) {
1.196 misha 343: InCycle temp(r);
1.164 paf 344:
1.129 paf 345: const String& var_name=params.as_string(0, "var name must be string");
346: int from=params.as_int(1, "from must be int", r);
347: int to=params.as_int(2, "to must be int", r);
1.186 misha 348: Value& body_code=params.as_junction(3, "body must be code");
1.129 paf 349: Value* delim_maybe_code=params.count()>4?¶ms[4]:0;
1.1 paf 350:
1.57 paf 351: if(to-from>=MAX_LOOPS) // too long loop?
1.166 misha 352: throw Exception(PARSER_RUNTIME,
1.129 paf 353: 0,
1.57 paf 354: "endless loop detected");
355:
1.129 paf 356: VInt* vint=new VInt(0);
1.154 paf 357:
358: VMethodFrame& caller=*r.get_method_frame()->caller();
1.218 moko 359: r.put_element(caller, var_name, vint);
1.186 misha 360: if(delim_maybe_code){ // delimiter set
1.185 misha 361: bool need_delim=false;
362:
363: for(int i=from; i<=to; i++) {
364: vint->set_int(i);
365:
366: StringOrValue sv_processed=r.process(body_code);
367: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 misha 368:
1.185 misha 369: const String* s_processed=sv_processed.get_string();
1.186 misha 370: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 371: if(need_delim) // need delim & iteration produced string?
372: r.write_pass_lang(r.process(*delim_maybe_code));
373: else
374: need_delim=true;
375: }
376: r.write_pass_lang(sv_processed);
1.1 paf 377:
1.185 misha 378: if(lskip==Request::SKIP_BREAK)
379: break;
1.1 paf 380: }
1.185 misha 381: } else {
382: for(int i=from; i<=to; i++) {
383: vint->set_int(i);
384:
385: r.process_write(body_code);
386: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.164 paf 387:
1.185 misha 388: if(lskip==Request::SKIP_BREAK)
389: break;
390: }
1.1 paf 391: }
392: }
393:
1.129 paf 394: static void _eval(Request& r, MethodParams& params) {
395: Value& expr=params.as_junction(0, "need expression");
1.1 paf 396: // evaluate expresion
1.129 paf 397: Value& value_result=r.process_to_value(expr,
1.165 misha 398: false/*don't intercept string*/).as_expr_result();
1.129 paf 399: if(params.count()>1) {
1.177 misha 400: const String& fmt=params.as_string(1, "fmt must be string").trim();
401: if(fmt.is_empty()){
402: r.write_no_lang(value_result);
403: } else {
404: r.write_no_lang(String(format(value_result.as_double(), fmt.cstrm())));
405: }
1.91 paf 406: } else
1.129 paf 407: r.write_no_lang(value_result);
1.1 paf 408: }
409:
1.129 paf 410: static void _connect(Request& r, MethodParams& params) {
411: Value& url=params.as_no_junction(0, "url must not be code");
412: Value& body_code=params.as_junction(1, "body must be code");
1.1 paf 413:
1.129 paf 414: Table* protocol2driver_and_client=0;
1.197 misha 415: if(Value* sql=r.main_class.get_element(String(MAIN_SQL_NAME))) {
416: if(Value* element=sql->get_element(String(MAIN_SQL_DRIVERS_NAME))) {
1.113 paf 417: protocol2driver_and_client=element->get_table();
418: }
419: }
1.11 paf 420:
1.1 paf 421: // connect
1.142 paf 422: SQL_Connection* connection=SQL_driver_manager->get_connection(url.as_string(),
1.144 paf 423: protocol2driver_and_client,
1.180 misha 424: r.charsets.source().NAME().cstr(),
425: r.request_info.document_root);
1.1 paf 426:
1.214 moko 427: Temp_connection temp_connection(r, connection);
1.63 paf 428:
1.1 paf 429: // execute body
1.53 parser 430: try {
1.189 misha 431: r.process_write(body_code);
1.129 paf 432: connection->commit();
433: connection->close();
1.75 paf 434: } catch(...) { // process problem
1.129 paf 435: connection->rollback();
436: connection->close();
437: rethrow;
1.1 paf 438: }
439: }
440:
1.41 parser 441: #ifndef DOXYGEN
1.129 paf 442: class Switch_data: public PA_Object {
443: public:
444: Request& r;
1.181 misha 445: const String* searching_string;
446: double searching_double;
1.207 misha 447: bool searching_bool;
1.129 paf 448: Value* found;
449: Value* _default;
450: public:
451: Switch_data(Request& ar, Value& asearching):
1.181 misha 452: r(ar)
453: {
454: if(asearching.is_string() || asearching.is_void()){
455: searching_string=&asearching.as_string();
456: searching_double=0;
1.207 misha 457: searching_bool=false;
1.181 misha 458: } else {
459: searching_string=0;
460: searching_double=asearching.as_double();
1.207 misha 461: searching_bool=asearching.is_bool();
1.181 misha 462: }
463: }
1.28 parser 464: };
1.41 parser 465: #endif
1.129 paf 466: static void _switch(Request& r, MethodParams& params) {
467: Switch_data* data=new Switch_data(r, r.process_to_value(params[0]));
1.215 moko 468: Temp_hash_value<HashString<void*>, void*> switch_data_setter(&r.classes_conf, switch_data_name, data);
1.28 parser 469:
1.129 paf 470: Value& cases_code=params.as_junction(1, "switch cases must be code");
1.82 paf 471: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
472: // because of stacked WWrapper used there as wcontext
1.84 paf 473: r.process(cases_code, true/*intercept_string*/);
1.147 paf 474: if(Value* selected_code=data->found? data->found: data->_default)
1.107 paf 475: r.write_pass_lang(r.process(*selected_code));
1.28 parser 476: }
477:
1.129 paf 478: static void _case(Request& r, MethodParams& params) {
479: Switch_data* data=static_cast<Switch_data*>(r.classes_conf.get(switch_data_name));
1.38 parser 480: if(!data)
1.166 misha 481: throw Exception(PARSER_RUNTIME,
1.129 paf 482: 0,
1.38 parser 483: "without switch");
1.28 parser 484:
1.181 misha 485: if(data->found) // matches already was found
486: return;
487:
1.129 paf 488: int count=params.count();
1.184 misha 489: Value* code=¶ms.as_expression(--count, "case result must be code");
490:
491: #ifdef USE_DESTRUCTORS
492: Junction *j=code->get_junction();
493: if (j){
494: code=new VJunction(j->self,j->method,j->method_frame,j->rcontext,j->wcontext,j->code);
495: if (j->wcontext) j->wcontext->attach_junction((VJunction *)code);
496: }
497: #endif
1.83 paf 498:
1.181 misha 499: for(int i=0; i<count; i++){
1.129 paf 500: Value& value=r.process_to_value(params[i]);
1.28 parser 501:
1.181 misha 502: if(value.is_string() && value.as_string() == CASE_DEFAULT_VALUE){
1.184 misha 503: data->_default=code;
1.181 misha 504: continue;
1.28 parser 505: }
506:
507: bool matches;
1.181 misha 508: if(data->searching_string)
509: matches=(*data->searching_string) == value.as_string();
1.207 misha 510: else if(data->searching_bool || value.is_bool())
511: matches=(data->searching_double != 0) == value.as_bool();
1.28 parser 512: else
1.181 misha 513: matches=data->searching_double == value.as_double();
1.82 paf 514:
1.181 misha 515: if(matches){
1.184 misha 516: data->found=code;
1.28 parser 517: break;
518: }
519: }
520: }
1.136 paf 521: #ifndef DOXYGEN
522: struct Try_catch_result {
523: StringOrValue processed_code;
524: const String* exception_should_be_handled;
525:
526: Try_catch_result(): exception_should_be_handled(0) {}
527: };
528: #endif
529:
530: /// used by ^try and ^cache, @returns $exception.handled[string] if any
531: template<class I>
532: static Try_catch_result try_catch(Request& r,
533: StringOrValue body_code(Request&, I), I info,
1.179 misha 534: Value* catch_code,
535: bool could_be_handled_by_caller=false)
1.136 paf 536: {
537: Try_catch_result result;
1.179 misha 538:
1.136 paf 539: if(!catch_code) {
540: result.processed_code=body_code(r, info);
541: return result;
542: }
543:
544: // taking snapshot of try-context
545: Request_context_saver try_context(r);
546: try {
547: result.processed_code=body_code(r, info);
548: } catch(const Exception& e) {
549: Request_context_saver throw_context(r); // taking snapshot of throw-context [stack trace contains error]
550: Request::Exception_details details=r.get_details(e);
551: try_context.restore(); // restoring try-context to perform catch-code
552:
553: Junction* junction=catch_code->get_junction();
554: Value* method_frame=junction->method_frame;
1.197 misha 555: Value* saved_exception_var_value=method_frame->get_element(exception_var_name);
1.154 paf 556: VMethodFrame& frame=*junction->method_frame;
1.217 moko 557: frame.put_element(exception_var_name, &details.vhash);
1.179 misha 558:
1.136 paf 559: result.processed_code=r.process(*catch_code);
560:
561: // retriving $exception.handled, restoring $exception var
562: Value* vhandled=details.vhash.hash().get(exception_handled_part_name);
1.217 moko 563: frame.put_element(exception_var_name, saved_exception_var_value);
1.136 paf 564:
565: bool bhandled=false;
566: if(vhandled) {
567: if(vhandled->is_string()) { // not simple $exception.handled(1/0)?
1.160 paf 568: if(could_be_handled_by_caller) { // and we can possibly handle it
569: result.exception_should_be_handled=vhandled->get_string(); // considering 'recovered' and let the caller recover
570: return result;
571: }
572:
573: bhandled=false;
574: } else
1.179 misha 575: bhandled=vhandled->as_bool();
1.136 paf 576: }
577:
578: if(!bhandled) {
579: throw_context.restore(); // restoring throw-context [exception were not handled]
580: rethrow;
581: }
582: }
1.179 misha 583:
1.136 paf 584: return result;
585: }
1.28 parser 586:
1.222 moko 587: static StringOrValue process_try_body_code(Request& r, Value* body_code) {
588: return r.process(*body_code);
589: }
590:
1.63 paf 591: // cache--
592:
593: // consts
594:
1.152 paf 595: const int DATA_STRING_SERIALIZED_VERSION=0x0006;
1.63 paf 596:
597: // helper types
598:
599: #ifndef DOXYGEN
600: struct Data_string_serialized_prolog {
601: int version;
1.79 paf 602: time_t expires;
1.63 paf 603: };
604: #endif
605:
1.68 paf 606: void cache_delete(const String& file_spec) {
1.167 misha 607: file_delete(file_spec, false/*fail_on_problem*/);
1.63 paf 608: }
1.69 paf 609:
610: #ifndef DOXYGEN
1.135 paf 611: struct Cache_scope {
1.129 paf 612: public:
1.79 paf 613: time_t expires;
1.135 paf 614: const String* body_from_disk;
1.79 paf 615: };
1.69 paf 616: struct Locked_process_and_cache_put_action_info {
617: Request *r;
1.136 paf 618: Cache_scope *scope;
1.167 misha 619: Value* body_code;
620: Value* catch_code;
1.136 paf 621: const String* processed_code;
1.69 paf 622: };
623: #endif
1.136 paf 624:
625:
626:
627: static StringOrValue process_cache_body_code(Request& r, Value* body_code) {
1.153 paf 628: return StringOrValue(r.process_to_string(*body_code));
1.136 paf 629: }
630:
1.129 paf 631: /* @todo maybe network order worth spending some effort?
632: don't bothering myself with network byte order,
633: am not planning to be able to move resulting file across platforms
634: */
1.69 paf 635: static void locked_process_and_cache_put_action(int f, void *context) {
636: Locked_process_and_cache_put_action_info& info=
637: *static_cast<Locked_process_and_cache_put_action_info *>(context);
1.129 paf 638:
1.160 paf 639: const String* body_from_disk=info.scope->body_from_disk;
1.69 paf 640: // body->process
1.136 paf 641: Try_catch_result result=try_catch(*info.r,
642: process_cache_body_code, info.body_code,
1.160 paf 643: info.catch_code, body_from_disk!=0 /*we have something old=we can handle=recover later*/);
1.136 paf 644:
645: if(result.exception_should_be_handled) {
646: if(*result.exception_should_be_handled==CACHE_EXCEPTION_HANDLED_CACHE_NAME) {
1.160 paf 647: assert(body_from_disk);
648: info.processed_code=body_from_disk;
1.136 paf 649: } else
1.166 misha 650: throw Exception(PARSER_RUNTIME,
1.136 paf 651: result.exception_should_be_handled,
1.219 moko 652: "$" EXCEPTION_VAR_NAME "." EXCEPTION_HANDLED_PART_NAME " value must be "
653: "either boolean or string '" CACHE_EXCEPTION_HANDLED_CACHE_NAME "'");
1.136 paf 654: } else
655: info.processed_code=&result.processed_code.as_string();
1.69 paf 656:
1.79 paf 657: // expiration time not spoiled by ^cache(0) or something?
1.136 paf 658: if(info.scope->expires > time(0)) {
1.79 paf 659: // string -serialize> buffer
1.136 paf 660: String::Cm serialized=info.processed_code->serialize(
1.129 paf 661: sizeof(Data_string_serialized_prolog));
1.79 paf 662: Data_string_serialized_prolog& prolog=
1.129 paf 663: *reinterpret_cast<Data_string_serialized_prolog *>(serialized.str);
1.79 paf 664: prolog.version=DATA_STRING_SERIALIZED_VERSION;
1.136 paf 665: prolog.expires=info.scope->expires;
1.79 paf 666:
667: // buffer -write> file
1.129 paf 668: write(f, serialized.str, serialized.length);
1.79 paf 669: } else // expired!
1.136 paf 670: info.scope->expires=0; // flag it so that could be easily checked by caller
1.69 paf 671: }
1.129 paf 672: const String* locked_process_and_cache_put(Request& r,
1.128 paf 673: Value& body_code,
1.136 paf 674: Value* catch_code,
675: Cache_scope& scope,
676: const String& file_spec)
677: {
1.140 paf 678: Locked_process_and_cache_put_action_info info={&r, &scope, &body_code, catch_code, 0};
1.69 paf 679:
1.129 paf 680: const String* result=file_write_action_under_lock(
1.69 paf 681: file_spec,
1.168 misha 682: "cache_put",
683: locked_process_and_cache_put_action,
684: &info,
1.69 paf 685: false/*as_text*/,
686: false/*do_append*/,
1.173 misha 687: false/*block == don't wait till other thread release lock*/,
688: false/*dun throw exception if lock failed*/) ? info.processed_code: 0;
1.168 misha 689:
1.100 paf 690: time_t now=time(0);
1.136 paf 691: if(scope.expires<=now)
1.79 paf 692: cache_delete(file_spec);
693: return result;
1.63 paf 694: }
1.137 paf 695: #ifndef DOXYGEN
1.135 paf 696: struct Cache_get_result {
697: const String* body;
698: bool expired;
1.137 paf 699: };
700: #endif
701: static Cache_get_result cache_get(Request_charsets& charsets, const String& file_spec, time_t now) {
1.140 paf 702: Cache_get_result result={0, false};
1.135 paf 703:
1.129 paf 704: File_read_result file=file_read(charsets, file_spec,
1.63 paf 705: false/*as_text*/,
1.129 paf 706: 0, //no params
707: false/*fail_on_read_problem*/);
708: if(file.success && file.length/* ignore reads which are empty due to
1.72 paf 709: non-unary open+lockEX conflict with lockSH */) {
1.129 paf 710:
1.72 paf 711: Data_string_serialized_prolog& prolog=
1.129 paf 712: *reinterpret_cast<Data_string_serialized_prolog *>(file.str);
1.63 paf 713:
1.135 paf 714: String* body=new String;
1.72 paf 715: if(
1.129 paf 716: file.length>=sizeof(Data_string_serialized_prolog)
1.135 paf 717: && prolog.version==DATA_STRING_SERIALIZED_VERSION) {
718: if(body->deserialize(sizeof(Data_string_serialized_prolog), file.str, file.length)) {
719: result.body=body;
720: result.expired=prolog.expires <= now;
721: }
722: }
1.72 paf 723: }
1.63 paf 724:
1.135 paf 725: return result;
1.63 paf 726: }
1.129 paf 727: static time_t as_expires(Request& r, MethodParams& params,
1.79 paf 728: int index, time_t now) {
729: time_t result;
1.197 misha 730: if(Value* vdate=params[index].as(VDATE_TYPE))
1.220 moko 731: result=(time_t)(static_cast<VDate*>(vdate)->get_time());
1.79 paf 732: else
1.129 paf 733: result=now+(time_t)params.as_double(index, "lifespan must be date or number", r);
1.79 paf 734:
735: return result;
736: }
1.129 paf 737: static const String& as_file_spec(Request& r, MethodParams& params, int index) {
738: return r.absolute(params.as_string(index, "filespec must be string"));
1.79 paf 739: }
1.129 paf 740: static void _cache(Request& r, MethodParams& params) {
1.173 misha 741: if(params.count()==0) {
742: // ^cache[] -- return current expiration time
1.158 paf 743: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
744: if(!scope)
1.221 moko 745: throw Exception(PARSER_RUNTIME, 0, "expire-time get without cache");
746: r.write_no_lang(*new VDate((pa_time_t)scope->expires));
1.158 paf 747: return;
748: }
749:
1.79 paf 750: time_t now=time(0);
751:
1.129 paf 752: if(params.count()==1) {
1.173 misha 753: // ^cache[filename] ^cache(seconds) ^cache[expires date]
1.129 paf 754: if(params[0].is_string()) { // filename?
1.79 paf 755: cache_delete(as_file_spec(r, params, 0));
756: return;
757: }
758:
759: // secods|expires date
1.135 paf 760: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
761: if(!scope)
1.166 misha 762: throw Exception(PARSER_RUNTIME,
1.129 paf 763: 0,
1.79 paf 764: "expire-time reducing instruction without cache");
765:
1.129 paf 766: time_t expires=as_expires(r, params, 0, now);
1.135 paf 767: if(expires < scope->expires)
768: scope->expires=expires;
1.79 paf 769:
770: return;
1.149 paf 771: } else if(params.count()<3)
1.166 misha 772: throw Exception(PARSER_RUNTIME,
1.149 paf 773: 0,
774: "invalid number of parameters");
1.63 paf 775:
776: // file_spec, expires, body code
1.172 misha 777: const String& file_spec=as_file_spec(r, params, 0);
1.65 paf 778:
1.141 paf 779: Cache_scope scope={as_expires(r, params, 1, now), 0};
1.135 paf 780:
1.215 moko 781: Temp_hash_value<HashString<void*>, void*> cache_scope_setter(&r.classes_conf, cache_data_name, &scope);
1.136 paf 782: Value& body_code=params.as_junction(2, "body_code must be code");
783: Value* catch_code=0;
784: if(params.count()>3)
785: catch_code=¶ms.as_junction(3, "catch_code must be code");
1.63 paf 786:
1.168 misha 787: if(scope.expires>now) {
788: Cache_get_result cached=cache_get(r.charsets, file_spec, now);
1.69 paf 789:
1.168 misha 790: if(cached.body) { // have cached copy
1.174 misha 791: if(cached.expired) {
792: scope.body_from_disk=cached.body; // storing for user to retrive it with ^cache[]
793: } else {
794: // and it's not expired yet write it out
1.168 misha 795: r.write_assign_lang(*cached.body);
796: // happy with it
797: return;
798: }
799: }
800:
801: // no cached info or it's already expired
1.173 misha 802:
803: // trying to process it under lock and store result in file
1.174 misha 804: const String* processed_body=locked_process_and_cache_put(r, body_code, catch_code, scope, file_spec);
1.173 misha 805: if(processed_body){
1.174 misha 806: // write it out
807: r.write_assign_lang(*processed_body);
808: // happy with it
809: return;
1.173 misha 810: } else {
811: // we fail while get exclusive lock. nvm, we just execute body_code a bit later
1.174 misha 812: }
1.69 paf 813: } else {
1.79 paf 814: // instructed not to cache; forget cached copy
1.68 paf 815: cache_delete(file_spec);
1.69 paf 816: }
1.168 misha 817:
1.222 moko 818: // process without caching
819: if(catch_code){
820: Try_catch_result result=try_catch(r, process_try_body_code, &body_code, catch_code);
821: r.write_assign_lang(result.processed_code);
822: } else {
823: const String& processed_body=r.process_to_string(body_code);
824: r.write_assign_lang(processed_body);
825: }
1.63 paf 826: }
827:
1.129 paf 828: static void _try_operator(Request& r, MethodParams& params) {
829: Value& body_code=params.as_junction(0, "body_code must be code");
830: Value& catch_code=params.as_junction(1, "catch_code must be code");
1.179 misha 831: Value* finally_code=(params.count()==3) ? ¶ms.as_junction(2, "finally_code must be code") : 0;
832:
833: Try_catch_result result;
834: StringOrValue finally_result;
835: try{
1.222 moko 836: result=try_catch(r, process_try_body_code, &body_code, &catch_code);
1.179 misha 837: } catch(...){
838: if(finally_code)
839: finally_result=r.process(*finally_code);
840: rethrow;
841: }
1.74 paf 842:
1.179 misha 843: if(finally_code)
844: finally_result=r.process(*finally_code);
1.123 paf 845:
1.136 paf 846: // write out processed body_code or catch_code
847: r.write_pass_lang(result.processed_code);
1.179 misha 848:
849: // write out processed finally code
850: if(finally_code)
851: r.write_pass_lang(finally_result);
1.74 paf 852: }
853:
1.138 paf 854: static void _throw_operator(Request&, MethodParams& params) {
1.178 misha 855: if(params.count()==1 && !params[0].is_string()) {
1.129 paf 856: if(HashStringValue *hash=params[0].get_hash()) {
857: const char* type=0;
858: if(Value* value=hash->get(exception_type_part_name))
1.78 paf 859: type=value->as_string().cstr();
1.129 paf 860: const String* source=0;
861: if(Value* value=hash->get(exception_source_part_name))
1.74 paf 862: source=&value->as_string();
1.138 paf 863: const char* comment=0;
1.129 paf 864: if(Value* value=hash->get(exception_comment_part_name))
1.74 paf 865: comment=value->as_string().cstr();
866:
1.78 paf 867: throw Exception(type,
1.129 paf 868: source?source:0,
869: "%s", comment?comment:"");
1.74 paf 870: } else
1.166 misha 871: throw Exception(PARSER_RUNTIME,
1.129 paf 872: 0,
1.178 misha 873: "one-param version has hash or string param");
1.74 paf 874: } else {
1.129 paf 875: const char* type=params.as_string(0, "type must be string").cstr();
1.178 misha 876: const String* source=params.count()>1? ¶ms.as_string(1, "source must be string"):0;
877: const char* comment=params.count()>2? params.as_string(2, "comment must be string").cstr():0;
878: throw Exception(type, source, "%s", comment?comment:"");
1.74 paf 879: }
1.132 paf 880: }
1.129 paf 881:
1.150 paf 882: static void _sleep_operator(Request& r, MethodParams& params) {
883: double seconds=params.as_double(0, "seconds must be double", r);
1.206 moko 884: if(seconds>0)
885: pa_sleep((int)trunc(seconds), (int)trunc((seconds-trunc(seconds))*1000000));
1.150 paf 886: }
887:
1.129 paf 888: #if defined(WIN32) && defined(_DEBUG)
889: # define PA_BPT
1.138 paf 890: static void _bpt(Request&, MethodParams&) {
1.129 paf 891: _asm int 3;
892: }
893: #endif
894:
1.10 paf 895: // constructor
896:
1.129 paf 897: VClassMAIN::VClassMAIN(): VClass() {
1.225 ! moko 898: set_type(MAIN_CLASS_NAME);
1.129 paf 899:
900: #ifdef PA_BPT
901: // ^bpt[]
902: add_native_method("bpt", Method::CT_ANY, _bpt, 0, 0);
903: #endif
1.121 paf 904:
1.1 paf 905: // ^if(condition){code-when-true}
906: // ^if(condition){code-when-true}{code-when-false}
1.200 moko 907: // ^if(condition){code-when-true} (another condition){code-when-true} ... {code-when-false}
908: add_native_method("if", Method::CT_ANY, _if, 2, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 909:
1.194 misha 910: // ^untaint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
911: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 912:
1.194 misha 913: // ^taint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
914: add_native_method("taint", Method::CT_ANY, _taint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 915:
1.205 moko 916: // ^apply-taint[untaint lang][string]
917: add_native_method("apply-taint", Method::CT_ANY, _apply_taint, 1, 2, Method::CO_WITHOUT_FRAME);
918:
1.216 moko 919: // ^process{code}
920: // ^process[context]{code}[options hash]
1.146 paf 921: add_native_method("process", Method::CT_ANY, _process, 1, 3);
1.1 paf 922:
923: // ^rem{code}
1.185 misha 924: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 925:
926: // ^while(condition){code}
1.185 misha 927: add_native_method("while", Method::CT_ANY, _while, 2, 3, Method::CO_WITHOUT_FRAME);
1.1 paf 928:
1.216 moko 929: // ^use[file[;options hash]]
930: add_native_method("use", Method::CT_ANY, _use, 1, 2);
1.1 paf 931:
1.164 paf 932: // ^break[]
1.185 misha 933: add_native_method("break", Method::CT_ANY, _break, 0, 0, Method::CO_WITHOUT_FRAME);
934:
1.164 paf 935: // ^continue[]
1.185 misha 936: add_native_method("continue", Method::CT_ANY, _continue, 0, 0, Method::CO_WITHOUT_FRAME);
937:
1.54 paf 938: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.185 misha 939: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1, Method::CO_WITHOUT_WCONTEXT);
1.1 paf 940:
941: // ^eval(expr)
942: // ^eval(expr)[format]
1.185 misha 943: add_native_method("eval", Method::CT_ANY, _eval, 1, 2, Method::CO_WITHOUT_FRAME);
1.52 parser 944:
1.1 paf 945: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 946: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
947:
1.63 paf 948:
1.136 paf 949: // ^cache[file_spec](time){code}[{catch code}] time=0 no cache
1.65 paf 950: // ^cache[file_spec] delete cache
1.161 paf 951: // ^cache[] get current expiration time
952: add_native_method("cache", Method::CT_ANY, _cache, 0, 4);
1.63 paf 953:
1.28 parser 954: // switch
955:
956: // ^switch[value]{cases}
1.185 misha 957: add_native_method("switch", Method::CT_ANY, _switch, 2, 2, Method::CO_WITHOUT_FRAME);
1.28 parser 958:
959: // ^case[value]{code}
1.185 misha 960: add_native_method("case", Method::CT_ANY, _case, 2, 10000, Method::CO_WITHOUT_FRAME);
1.74 paf 961:
962: // try-catch
963:
964: // ^try{code}{catch code}
1.185 misha 965: add_native_method("try", Method::CT_ANY, _try_operator, 2, 3, Method::CO_WITHOUT_FRAME);
1.74 paf 966: // ^throw[$exception hash]
967: // ^throw[type;source;comment]
968: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
969:
1.150 paf 970: add_native_method("sleep", Method::CT_ANY, _sleep_operator, 1, 1);
1.10 paf 971: }
1.11 paf 972:
973: // constructor & configurator
1.1 paf 974:
1.129 paf 975: VStateless_class& VClassMAIN_create() {
976: return *new VClassMAIN;
1.1 paf 977: }
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