Annotation of parser3/src/classes/op.C, revision 1.233
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:
1.233 ! moko 21: volatile const char * IDENT_OP_C="$Id: op.C,v 1.232 2016/09/20 09:55:02 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 {
1.233 ! moko 157: target_self=&maybe_target_self;
! 158: if(params.count()==1)
! 159: throw Exception(PARSER_RUNTIME, 0, "no body specified");
! 160: index++;
1.129 paf 161: }
162:
1.1 paf 163: {
1.197 misha 164: VStateless_class *target_class=target_self->get_class();
1.116 paf 165: if(!target_class)
1.232 moko 166: throw Exception(PARSER_RUNTIME, 0, "no target class");
1.114 paf 167:
1.73 paf 168: // temporary remove language change
1.192 misha 169: Temp_lang temp_lang(r, String::L_PARSER_CODE);
1.1 paf 170: // temporary zero @main so to maybe-replace it in processed code
1.129 paf 171: Temp_method temp_method_main(*target_class, main_method_name, 0);
172:
173: const String* main_alias=0;
1.146 paf 174: const String* file_alias=0;
175: int line_no_alias_offset=0;
1.216 moko 176: bool allow_class_replace=false;
1.211 misha 177:
178: size_t options_index=index+1;
179: if(options_index<params.count())
180: if(HashStringValue* options=params.as_hash(options_index)) {
1.216 moko 181:
1.211 misha 182: int valid_options=0;
1.216 moko 183: for(HashStringValue::Iterator i(*options); i; i.next() ){
184:
185: String::Body key=i.key();
186: Value* value=i.value();
187:
188: if(key == "main") {
189: valid_options++;
190: main_alias=&value->as_string();
191: } else if(key == "file") {
192: valid_options++;
193: file_alias=&value->as_string();
194: } else if(key == "lineno") {
195: valid_options++;
196: line_no_alias_offset=value->as_int();
197: } else if(key == "replace") {
198: valid_options++;
199: allow_class_replace=r.process_to_value(*value).as_bool();
200: }
1.211 misha 201: }
1.216 moko 202:
1.211 misha 203: if(valid_options!=options->count())
204: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
1.146 paf 205: }
1.129 paf 206:
1.232 moko 207: uint processe_file_no=file_alias ? r.register_file(r.absolute(*file_alias)) : pseudo_file_no__process;
1.146 paf 208: // process...{string}
209: Value& vjunction=params.as_junction(index, "body must be code");
210: // evaluate source to process
211: const String& source=r.process_to_string(vjunction);
1.216 moko 212:
213: Temp_class_replace class_replace(r, allow_class_replace);
214:
1.232 moko 215: r.use_buf(*target_class, source.untaint_cstr(String::L_AS_IS, r.connection(false)), main_alias, processe_file_no, line_no_alias_offset);
1.1 paf 216:
1.73 paf 217: // main_method
1.129 paf 218: main_method=target_class->get_method(main_method_name);
1.73 paf 219: }
220: // after restoring current-request-lang
221: // maybe-execute @main[]
222: if(main_method) {
1.202 moko 223: VMethodFrame frame(*main_method, r.get_method_frame()->caller(), *target_self);
224: frame.empty_params();
1.203 moko 225: r.op_call(frame);
226: r.write_pass_lang(frame.result());
1.1 paf 227: }
228: }
229:
1.138 paf 230: static void _rem(Request&, MethodParams& params) {
1.129 paf 231: params.as_junction(0, "body must be code");
1.1 paf 232: }
233:
1.129 paf 234: static void _while(Request& r, MethodParams& params) {
1.196 misha 235: InCycle temp(r);
1.164 paf 236:
1.170 misha 237: Value& vcondition=params.as_expression(0, "condition must be number, bool or expression");
238:
1.162 paf 239: Value& body_code=params.as_junction(1, "body must be code");
240: Value* delim_maybe_code=params.count()>2?¶ms[2]:0;
1.1 paf 241:
242: // while...
243: int endless_loop_count=0;
1.186 misha 244: if(delim_maybe_code){ // delimiter set
1.185 misha 245: bool need_delim=false;
246: while(true) {
247: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
248: throw Exception(PARSER_RUNTIME,
249: 0,
250: "endless loop detected");
251:
252: if(!r.process_to_value(vcondition, false/*don't intercept string*/).as_bool())
253: break;
1.1 paf 254:
1.185 misha 255: StringOrValue sv_processed=r.process(body_code);
256: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 misha 257:
1.185 misha 258: const String* s_processed=sv_processed.get_string();
1.186 misha 259: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 260: if(need_delim) // need delim & iteration produced string?
261: r.write_pass_lang(r.process(*delim_maybe_code));
262: else
263: need_delim=true;
264: }
265: r.write_pass_lang(sv_processed);
1.1 paf 266:
1.185 misha 267: if(lskip==Request::SKIP_BREAK)
268: break;
1.162 paf 269: }
1.185 misha 270: } else {
271: while(true) {
272: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
273: throw Exception(PARSER_RUNTIME,
274: 0,
275: "endless loop detected");
276:
277: if(!r.process_to_value(vcondition, false/*don't intercept string*/).as_bool())
278: break;
1.164 paf 279:
1.185 misha 280: r.process_write(body_code);
281: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
282:
283: if(lskip==Request::SKIP_BREAK)
284: break;
285: }
1.1 paf 286: }
287: }
288:
1.129 paf 289: static void _use(Request& r, MethodParams& params) {
1.171 misha 290: Value& vfile=params.as_no_junction(0, FILE_NAME_MUST_NOT_BE_CODE);
1.199 misha 291:
1.216 moko 292: bool allow_class_replace=false;
293:
294: if(params.count()==2)
295: if(HashStringValue* options=params.as_hash(1)) {
296: int valid_options=0;
297: for(HashStringValue::Iterator i(*options); i; i.next() ){
298:
299: String::Body key=i.key();
300: Value* value=i.value();
301:
302: if(key == "replace") {
303: valid_options++;
304: allow_class_replace=r.process_to_value(*value).as_bool();
305: }
306:
307: if(valid_options!=options->count())
308: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
309: }
310: }
311:
312: Temp_class_replace class_replace(r, allow_class_replace);
313:
1.199 misha 314: // _use could be called from the parser3 method only, so caller is always defined
1.202 moko 315: r.use_file(r.main_class, vfile.as_string(), r.get_method_filename(&r.get_method_frame()->caller()->method));
1.1 paf 316: }
317:
1.164 paf 318: static void set_skip(Request& r, Request::Skip askip) {
1.196 misha 319: if(!r.get_in_cycle())
1.227 moko 320: throw Exception(askip==Request::SKIP_BREAK ? "parser.break" : "parser.continue", 0, "without cycle");
1.164 paf 321: r.set_skip(askip);
322: }
323:
1.227 moko 324: static void _break(Request& r, MethodParams& params) {
325: if(!params.count() || params.as_bool(0, "condition must be expression", r)) set_skip(r, Request::SKIP_BREAK);
1.164 paf 326: }
327:
1.227 moko 328: static void _continue(Request& r, MethodParams& params) {
329: if(!params.count() || params.as_bool(0, "condition must be expression", r)) set_skip(r, Request::SKIP_CONTINUE);
1.164 paf 330: }
331:
1.129 paf 332: static void _for(Request& r, MethodParams& params) {
1.196 misha 333: InCycle temp(r);
1.164 paf 334:
1.129 paf 335: const String& var_name=params.as_string(0, "var name must be string");
336: int from=params.as_int(1, "from must be int", r);
337: int to=params.as_int(2, "to must be int", r);
1.186 misha 338: Value& body_code=params.as_junction(3, "body must be code");
1.129 paf 339: Value* delim_maybe_code=params.count()>4?¶ms[4]:0;
1.1 paf 340:
1.57 paf 341: if(to-from>=MAX_LOOPS) // too long loop?
1.166 misha 342: throw Exception(PARSER_RUNTIME,
1.129 paf 343: 0,
1.57 paf 344: "endless loop detected");
345:
1.129 paf 346: VInt* vint=new VInt(0);
1.154 paf 347:
348: VMethodFrame& caller=*r.get_method_frame()->caller();
1.218 moko 349: r.put_element(caller, var_name, vint);
1.186 misha 350: if(delim_maybe_code){ // delimiter set
1.185 misha 351: bool need_delim=false;
352:
353: for(int i=from; i<=to; i++) {
354: vint->set_int(i);
355:
356: StringOrValue sv_processed=r.process(body_code);
357: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 misha 358:
1.185 misha 359: const String* s_processed=sv_processed.get_string();
1.186 misha 360: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 361: if(need_delim) // need delim & iteration produced string?
362: r.write_pass_lang(r.process(*delim_maybe_code));
363: else
364: need_delim=true;
365: }
366: r.write_pass_lang(sv_processed);
1.1 paf 367:
1.185 misha 368: if(lskip==Request::SKIP_BREAK)
369: break;
1.1 paf 370: }
1.185 misha 371: } else {
372: for(int i=from; i<=to; i++) {
373: vint->set_int(i);
374:
375: r.process_write(body_code);
376: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.164 paf 377:
1.185 misha 378: if(lskip==Request::SKIP_BREAK)
379: break;
380: }
1.1 paf 381: }
382: }
383:
1.129 paf 384: static void _eval(Request& r, MethodParams& params) {
385: Value& expr=params.as_junction(0, "need expression");
1.1 paf 386: // evaluate expresion
1.129 paf 387: Value& value_result=r.process_to_value(expr,
1.165 misha 388: false/*don't intercept string*/).as_expr_result();
1.129 paf 389: if(params.count()>1) {
1.177 misha 390: const String& fmt=params.as_string(1, "fmt must be string").trim();
391: if(fmt.is_empty()){
392: r.write_no_lang(value_result);
393: } else {
394: r.write_no_lang(String(format(value_result.as_double(), fmt.cstrm())));
395: }
1.91 paf 396: } else
1.129 paf 397: r.write_no_lang(value_result);
1.1 paf 398: }
399:
1.129 paf 400: static void _connect(Request& r, MethodParams& params) {
401: Value& url=params.as_no_junction(0, "url must not be code");
402: Value& body_code=params.as_junction(1, "body must be code");
1.1 paf 403:
1.129 paf 404: Table* protocol2driver_and_client=0;
1.197 misha 405: if(Value* sql=r.main_class.get_element(String(MAIN_SQL_NAME))) {
406: if(Value* element=sql->get_element(String(MAIN_SQL_DRIVERS_NAME))) {
1.113 paf 407: protocol2driver_and_client=element->get_table();
408: }
409: }
1.11 paf 410:
1.1 paf 411: // connect
1.142 paf 412: SQL_Connection* connection=SQL_driver_manager->get_connection(url.as_string(),
1.144 paf 413: protocol2driver_and_client,
1.180 misha 414: r.charsets.source().NAME().cstr(),
415: r.request_info.document_root);
1.1 paf 416:
1.214 moko 417: Temp_connection temp_connection(r, connection);
1.63 paf 418:
1.1 paf 419: // execute body
1.53 parser 420: try {
1.189 misha 421: r.process_write(body_code);
1.129 paf 422: connection->commit();
423: connection->close();
1.75 paf 424: } catch(...) { // process problem
1.129 paf 425: connection->rollback();
426: connection->close();
427: rethrow;
1.1 paf 428: }
429: }
430:
1.41 parser 431: #ifndef DOXYGEN
1.129 paf 432: class Switch_data: public PA_Object {
433: public:
434: Request& r;
1.181 misha 435: const String* searching_string;
436: double searching_double;
1.207 misha 437: bool searching_bool;
1.129 paf 438: Value* found;
439: Value* _default;
440: public:
441: Switch_data(Request& ar, Value& asearching):
1.181 misha 442: r(ar)
443: {
444: if(asearching.is_string() || asearching.is_void()){
445: searching_string=&asearching.as_string();
446: searching_double=0;
1.207 misha 447: searching_bool=false;
1.181 misha 448: } else {
449: searching_string=0;
450: searching_double=asearching.as_double();
1.207 misha 451: searching_bool=asearching.is_bool();
1.181 misha 452: }
453: }
1.28 parser 454: };
1.41 parser 455: #endif
1.129 paf 456: static void _switch(Request& r, MethodParams& params) {
457: Switch_data* data=new Switch_data(r, r.process_to_value(params[0]));
1.215 moko 458: Temp_hash_value<HashString<void*>, void*> switch_data_setter(&r.classes_conf, switch_data_name, data);
1.28 parser 459:
1.129 paf 460: Value& cases_code=params.as_junction(1, "switch cases must be code");
1.82 paf 461: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
462: // because of stacked WWrapper used there as wcontext
1.84 paf 463: r.process(cases_code, true/*intercept_string*/);
1.147 paf 464: if(Value* selected_code=data->found? data->found: data->_default)
1.107 paf 465: r.write_pass_lang(r.process(*selected_code));
1.28 parser 466: }
467:
1.129 paf 468: static void _case(Request& r, MethodParams& params) {
469: Switch_data* data=static_cast<Switch_data*>(r.classes_conf.get(switch_data_name));
1.38 parser 470: if(!data)
1.166 misha 471: throw Exception(PARSER_RUNTIME,
1.129 paf 472: 0,
1.38 parser 473: "without switch");
1.28 parser 474:
1.181 misha 475: if(data->found) // matches already was found
476: return;
477:
1.129 paf 478: int count=params.count();
1.184 misha 479: Value* code=¶ms.as_expression(--count, "case result must be code");
480:
481: #ifdef USE_DESTRUCTORS
482: Junction *j=code->get_junction();
483: if (j){
484: code=new VJunction(j->self,j->method,j->method_frame,j->rcontext,j->wcontext,j->code);
485: if (j->wcontext) j->wcontext->attach_junction((VJunction *)code);
486: }
487: #endif
1.83 paf 488:
1.181 misha 489: for(int i=0; i<count; i++){
1.129 paf 490: Value& value=r.process_to_value(params[i]);
1.28 parser 491:
1.181 misha 492: if(value.is_string() && value.as_string() == CASE_DEFAULT_VALUE){
1.184 misha 493: data->_default=code;
1.181 misha 494: continue;
1.28 parser 495: }
496:
497: bool matches;
1.181 misha 498: if(data->searching_string)
499: matches=(*data->searching_string) == value.as_string();
1.207 misha 500: else if(data->searching_bool || value.is_bool())
501: matches=(data->searching_double != 0) == value.as_bool();
1.28 parser 502: else
1.181 misha 503: matches=data->searching_double == value.as_double();
1.82 paf 504:
1.181 misha 505: if(matches){
1.184 misha 506: data->found=code;
1.28 parser 507: break;
508: }
509: }
510: }
1.136 paf 511: #ifndef DOXYGEN
512: struct Try_catch_result {
513: StringOrValue processed_code;
514: const String* exception_should_be_handled;
515:
516: Try_catch_result(): exception_should_be_handled(0) {}
517: };
1.229 moko 518:
519: /// Auto-object used for temporary changing Request::skip.
520: class Temp_skip {
521: Request& frequest;
522: Request::Skip saved_skip;
523: public:
524: Temp_skip(Request& arequest) : frequest(arequest), saved_skip(arequest.get_skip()) {
525: arequest.set_skip(Request::SKIP_NOTHING);
526: }
527: ~Temp_skip() {
528: if(frequest.get_skip() == Request::SKIP_NOTHING)
529: frequest.set_skip(saved_skip);
530: }
531: };
1.136 paf 532: #endif
533:
534: /// used by ^try and ^cache, @returns $exception.handled[string] if any
535: template<class I>
1.228 moko 536: static Try_catch_result try_catch(Request& r, StringOrValue body_code(Request&, I), I info, Value* catch_code, bool could_be_handled_by_caller=false) {
1.136 paf 537: Try_catch_result result;
1.179 misha 538:
1.228 moko 539: // minor bug: context not restored if only finally code is present, see #1062
1.136 paf 540: if(!catch_code) {
541: result.processed_code=body_code(r, info);
542: return result;
543: }
544:
545: // taking snapshot of try-context
546: Request_context_saver try_context(r);
547: try {
548: result.processed_code=body_code(r, info);
549: } catch(const Exception& e) {
1.230 moko 550: Request_context_saver throw_context(r); // remembering exception stack trace
551:
1.136 paf 552: Request::Exception_details details=r.get_details(e);
1.230 moko 553:
1.228 moko 554: try_context.restore(); // restoring try-context for code after try and catch-code
1.136 paf 555:
1.228 moko 556: {
557: Temp_value_element temp(r, *catch_code->get_junction()->method_frame, exception_var_name, &details.vhash);
1.229 moko 558: Temp_skip temp_skip(r);
1.228 moko 559: result.processed_code=r.process(*catch_code);
560: }
1.136 paf 561:
1.228 moko 562: // retriving $exception.handled
1.136 paf 563: Value* vhandled=details.vhash.hash().get(exception_handled_part_name);
564:
565: bool bhandled=false;
566: if(vhandled) {
567: if(vhandled->is_string()) { // not simple $exception.handled(1/0)?
1.228 moko 568: if(bhandled=could_be_handled_by_caller) { // and we can possibly handle it
1.160 paf 569: result.exception_should_be_handled=vhandled->get_string(); // considering 'recovered' and let the caller recover
570: }
571: } else
1.179 misha 572: bhandled=vhandled->as_bool();
1.136 paf 573: }
574:
1.230 moko 575: if(!bhandled){
576: throw_context.restore(); // restoring exception stack trace creared by try_context.restore()
1.136 paf 577: rethrow;
1.230 moko 578: }
1.136 paf 579: }
1.179 misha 580:
1.136 paf 581: return result;
582: }
1.28 parser 583:
1.222 moko 584: static StringOrValue process_try_body_code(Request& r, Value* body_code) {
585: return r.process(*body_code);
586: }
587:
1.63 paf 588: // cache--
589:
590: // consts
591:
1.152 paf 592: const int DATA_STRING_SERIALIZED_VERSION=0x0006;
1.63 paf 593:
594: // helper types
595:
596: #ifndef DOXYGEN
597: struct Data_string_serialized_prolog {
598: int version;
1.79 paf 599: time_t expires;
1.63 paf 600: };
601: #endif
602:
1.68 paf 603: void cache_delete(const String& file_spec) {
1.167 misha 604: file_delete(file_spec, false/*fail_on_problem*/);
1.63 paf 605: }
1.69 paf 606:
607: #ifndef DOXYGEN
1.135 paf 608: struct Cache_scope {
1.129 paf 609: public:
1.79 paf 610: time_t expires;
1.135 paf 611: const String* body_from_disk;
1.79 paf 612: };
1.69 paf 613: struct Locked_process_and_cache_put_action_info {
614: Request *r;
1.136 paf 615: Cache_scope *scope;
1.167 misha 616: Value* body_code;
617: Value* catch_code;
1.136 paf 618: const String* processed_code;
1.69 paf 619: };
620: #endif
1.136 paf 621:
622:
623:
624: static StringOrValue process_cache_body_code(Request& r, Value* body_code) {
1.153 paf 625: return StringOrValue(r.process_to_string(*body_code));
1.136 paf 626: }
627:
1.129 paf 628: /* @todo maybe network order worth spending some effort?
629: don't bothering myself with network byte order,
630: am not planning to be able to move resulting file across platforms
631: */
1.69 paf 632: static void locked_process_and_cache_put_action(int f, void *context) {
633: Locked_process_and_cache_put_action_info& info=
634: *static_cast<Locked_process_and_cache_put_action_info *>(context);
1.129 paf 635:
1.160 paf 636: const String* body_from_disk=info.scope->body_from_disk;
1.69 paf 637: // body->process
1.136 paf 638: Try_catch_result result=try_catch(*info.r,
639: process_cache_body_code, info.body_code,
1.160 paf 640: info.catch_code, body_from_disk!=0 /*we have something old=we can handle=recover later*/);
1.136 paf 641:
642: if(result.exception_should_be_handled) {
643: if(*result.exception_should_be_handled==CACHE_EXCEPTION_HANDLED_CACHE_NAME) {
1.160 paf 644: assert(body_from_disk);
645: info.processed_code=body_from_disk;
1.136 paf 646: } else
1.166 misha 647: throw Exception(PARSER_RUNTIME,
1.136 paf 648: result.exception_should_be_handled,
1.219 moko 649: "$" EXCEPTION_VAR_NAME "." EXCEPTION_HANDLED_PART_NAME " value must be "
650: "either boolean or string '" CACHE_EXCEPTION_HANDLED_CACHE_NAME "'");
1.136 paf 651: } else
652: info.processed_code=&result.processed_code.as_string();
1.69 paf 653:
1.79 paf 654: // expiration time not spoiled by ^cache(0) or something?
1.136 paf 655: if(info.scope->expires > time(0)) {
1.79 paf 656: // string -serialize> buffer
1.136 paf 657: String::Cm serialized=info.processed_code->serialize(
1.129 paf 658: sizeof(Data_string_serialized_prolog));
1.79 paf 659: Data_string_serialized_prolog& prolog=
1.129 paf 660: *reinterpret_cast<Data_string_serialized_prolog *>(serialized.str);
1.79 paf 661: prolog.version=DATA_STRING_SERIALIZED_VERSION;
1.136 paf 662: prolog.expires=info.scope->expires;
1.79 paf 663:
664: // buffer -write> file
1.129 paf 665: write(f, serialized.str, serialized.length);
1.79 paf 666: } else // expired!
1.136 paf 667: info.scope->expires=0; // flag it so that could be easily checked by caller
1.69 paf 668: }
1.129 paf 669: const String* locked_process_and_cache_put(Request& r,
1.128 paf 670: Value& body_code,
1.136 paf 671: Value* catch_code,
672: Cache_scope& scope,
673: const String& file_spec)
674: {
1.140 paf 675: Locked_process_and_cache_put_action_info info={&r, &scope, &body_code, catch_code, 0};
1.69 paf 676:
1.129 paf 677: const String* result=file_write_action_under_lock(
1.69 paf 678: file_spec,
1.168 misha 679: "cache_put",
680: locked_process_and_cache_put_action,
681: &info,
1.69 paf 682: false/*as_text*/,
683: false/*do_append*/,
1.173 misha 684: false/*block == don't wait till other thread release lock*/,
685: false/*dun throw exception if lock failed*/) ? info.processed_code: 0;
1.168 misha 686:
1.100 paf 687: time_t now=time(0);
1.136 paf 688: if(scope.expires<=now)
1.79 paf 689: cache_delete(file_spec);
690: return result;
1.63 paf 691: }
1.229 moko 692:
1.137 paf 693: #ifndef DOXYGEN
1.135 paf 694: struct Cache_get_result {
695: const String* body;
696: bool expired;
1.137 paf 697: };
698: #endif
1.229 moko 699:
1.137 paf 700: static Cache_get_result cache_get(Request_charsets& charsets, const String& file_spec, time_t now) {
1.140 paf 701: Cache_get_result result={0, false};
1.135 paf 702:
1.129 paf 703: File_read_result file=file_read(charsets, file_spec,
1.63 paf 704: false/*as_text*/,
1.129 paf 705: 0, //no params
706: false/*fail_on_read_problem*/);
707: if(file.success && file.length/* ignore reads which are empty due to
1.72 paf 708: non-unary open+lockEX conflict with lockSH */) {
1.129 paf 709:
1.72 paf 710: Data_string_serialized_prolog& prolog=
1.129 paf 711: *reinterpret_cast<Data_string_serialized_prolog *>(file.str);
1.63 paf 712:
1.135 paf 713: String* body=new String;
1.72 paf 714: if(
1.129 paf 715: file.length>=sizeof(Data_string_serialized_prolog)
1.135 paf 716: && prolog.version==DATA_STRING_SERIALIZED_VERSION) {
717: if(body->deserialize(sizeof(Data_string_serialized_prolog), file.str, file.length)) {
718: result.body=body;
719: result.expired=prolog.expires <= now;
720: }
721: }
1.72 paf 722: }
1.63 paf 723:
1.135 paf 724: return result;
1.63 paf 725: }
1.129 paf 726: static time_t as_expires(Request& r, MethodParams& params,
1.79 paf 727: int index, time_t now) {
728: time_t result;
1.197 misha 729: if(Value* vdate=params[index].as(VDATE_TYPE))
1.220 moko 730: result=(time_t)(static_cast<VDate*>(vdate)->get_time());
1.79 paf 731: else
1.129 paf 732: result=now+(time_t)params.as_double(index, "lifespan must be date or number", r);
1.79 paf 733:
734: return result;
735: }
1.229 moko 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: }
1.229 moko 740:
1.129 paf 741: static void _cache(Request& r, MethodParams& params) {
1.173 misha 742: if(params.count()==0) {
743: // ^cache[] -- return current expiration time
1.158 paf 744: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
745: if(!scope)
1.221 moko 746: throw Exception(PARSER_RUNTIME, 0, "expire-time get without cache");
747: r.write_no_lang(*new VDate((pa_time_t)scope->expires));
1.158 paf 748: return;
749: }
750:
1.79 paf 751: time_t now=time(0);
752:
1.129 paf 753: if(params.count()==1) {
1.173 misha 754: // ^cache[filename] ^cache(seconds) ^cache[expires date]
1.129 paf 755: if(params[0].is_string()) { // filename?
1.79 paf 756: cache_delete(as_file_spec(r, params, 0));
757: return;
758: }
759:
760: // secods|expires date
1.135 paf 761: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
762: if(!scope)
1.166 misha 763: throw Exception(PARSER_RUNTIME,
1.129 paf 764: 0,
1.79 paf 765: "expire-time reducing instruction without cache");
766:
1.129 paf 767: time_t expires=as_expires(r, params, 0, now);
1.135 paf 768: if(expires < scope->expires)
769: scope->expires=expires;
1.79 paf 770:
771: return;
1.149 paf 772: } else if(params.count()<3)
1.166 misha 773: throw Exception(PARSER_RUNTIME,
1.149 paf 774: 0,
775: "invalid number of parameters");
1.63 paf 776:
777: // file_spec, expires, body code
1.172 misha 778: const String& file_spec=as_file_spec(r, params, 0);
1.65 paf 779:
1.141 paf 780: Cache_scope scope={as_expires(r, params, 1, now), 0};
1.135 paf 781:
1.215 moko 782: Temp_hash_value<HashString<void*>, void*> cache_scope_setter(&r.classes_conf, cache_data_name, &scope);
1.136 paf 783: Value& body_code=params.as_junction(2, "body_code must be code");
784: Value* catch_code=0;
785: if(params.count()>3)
786: catch_code=¶ms.as_junction(3, "catch_code must be code");
1.63 paf 787:
1.168 misha 788: if(scope.expires>now) {
789: Cache_get_result cached=cache_get(r.charsets, file_spec, now);
1.69 paf 790:
1.168 misha 791: if(cached.body) { // have cached copy
1.174 misha 792: if(cached.expired) {
793: scope.body_from_disk=cached.body; // storing for user to retrive it with ^cache[]
794: } else {
795: // and it's not expired yet write it out
1.168 misha 796: r.write_assign_lang(*cached.body);
797: // happy with it
798: return;
799: }
800: }
801:
802: // no cached info or it's already expired
1.173 misha 803:
804: // trying to process it under lock and store result in file
1.174 misha 805: const String* processed_body=locked_process_and_cache_put(r, body_code, catch_code, scope, file_spec);
1.173 misha 806: if(processed_body){
1.174 misha 807: // write it out
808: r.write_assign_lang(*processed_body);
809: // happy with it
810: return;
1.173 misha 811: } else {
812: // we fail while get exclusive lock. nvm, we just execute body_code a bit later
1.174 misha 813: }
1.69 paf 814: } else {
1.79 paf 815: // instructed not to cache; forget cached copy
1.68 paf 816: cache_delete(file_spec);
1.69 paf 817: }
1.168 misha 818:
1.222 moko 819: // process without caching
820: if(catch_code){
821: Try_catch_result result=try_catch(r, process_try_body_code, &body_code, catch_code);
822: r.write_assign_lang(result.processed_code);
823: } else {
824: const String& processed_body=r.process_to_string(body_code);
825: r.write_assign_lang(processed_body);
826: }
1.63 paf 827: }
828:
1.129 paf 829: static void _try_operator(Request& r, MethodParams& params) {
830: Value& body_code=params.as_junction(0, "body_code must be code");
831: Value& catch_code=params.as_junction(1, "catch_code must be code");
1.179 misha 832: Value* finally_code=(params.count()==3) ? ¶ms.as_junction(2, "finally_code must be code") : 0;
833:
834: Try_catch_result result;
835: StringOrValue finally_result;
1.229 moko 836:
1.179 misha 837: try{
1.229 moko 838: // process try and catch code
1.222 moko 839: result=try_catch(r, process_try_body_code, &body_code, &catch_code);
1.179 misha 840: } catch(...){
1.229 moko 841: // process finally code but ignore the result
842: if(finally_code){
843: Temp_skip temp(r);
1.179 misha 844: finally_result=r.process(*finally_code);
1.229 moko 845: }
1.179 misha 846: rethrow;
847: }
1.74 paf 848:
1.229 moko 849: // process finally code
850: if(finally_code){
851: Temp_skip temp(r);
1.179 misha 852: finally_result=r.process(*finally_code);
1.229 moko 853: }
854:
855: // no exception in try, catch or finally, writing the result
1.123 paf 856:
1.136 paf 857: // write out processed body_code or catch_code
858: r.write_pass_lang(result.processed_code);
1.179 misha 859:
860: // write out processed finally code
861: if(finally_code)
862: r.write_pass_lang(finally_result);
1.74 paf 863: }
864:
1.138 paf 865: static void _throw_operator(Request&, MethodParams& params) {
1.178 misha 866: if(params.count()==1 && !params[0].is_string()) {
1.129 paf 867: if(HashStringValue *hash=params[0].get_hash()) {
868: const char* type=0;
869: if(Value* value=hash->get(exception_type_part_name))
1.78 paf 870: type=value->as_string().cstr();
1.129 paf 871: const String* source=0;
872: if(Value* value=hash->get(exception_source_part_name))
1.74 paf 873: source=&value->as_string();
1.138 paf 874: const char* comment=0;
1.129 paf 875: if(Value* value=hash->get(exception_comment_part_name))
1.74 paf 876: comment=value->as_string().cstr();
877:
1.78 paf 878: throw Exception(type,
1.129 paf 879: source?source:0,
880: "%s", comment?comment:"");
1.74 paf 881: } else
1.166 misha 882: throw Exception(PARSER_RUNTIME,
1.129 paf 883: 0,
1.178 misha 884: "one-param version has hash or string param");
1.74 paf 885: } else {
1.129 paf 886: const char* type=params.as_string(0, "type must be string").cstr();
1.178 misha 887: const String* source=params.count()>1? ¶ms.as_string(1, "source must be string"):0;
888: const char* comment=params.count()>2? params.as_string(2, "comment must be string").cstr():0;
889: throw Exception(type, source, "%s", comment?comment:"");
1.74 paf 890: }
1.132 paf 891: }
1.129 paf 892:
1.150 paf 893: static void _sleep_operator(Request& r, MethodParams& params) {
894: double seconds=params.as_double(0, "seconds must be double", r);
1.206 moko 895: if(seconds>0)
896: pa_sleep((int)trunc(seconds), (int)trunc((seconds-trunc(seconds))*1000000));
1.150 paf 897: }
898:
1.129 paf 899: #if defined(WIN32) && defined(_DEBUG)
900: # define PA_BPT
1.138 paf 901: static void _bpt(Request&, MethodParams&) {
1.129 paf 902: _asm int 3;
903: }
904: #endif
905:
1.10 paf 906: // constructor
907:
1.226 moko 908: VClassMAIN::VClassMAIN(): VClass(MAIN_CLASS_NAME) {
1.129 paf 909:
910: #ifdef PA_BPT
911: // ^bpt[]
912: add_native_method("bpt", Method::CT_ANY, _bpt, 0, 0);
913: #endif
1.121 paf 914:
1.1 paf 915: // ^if(condition){code-when-true}
916: // ^if(condition){code-when-true}{code-when-false}
1.200 moko 917: // ^if(condition){code-when-true} (another condition){code-when-true} ... {code-when-false}
918: add_native_method("if", Method::CT_ANY, _if, 2, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 919:
1.194 misha 920: // ^untaint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
921: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 922:
1.194 misha 923: // ^taint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
924: add_native_method("taint", Method::CT_ANY, _taint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 925:
1.205 moko 926: // ^apply-taint[untaint lang][string]
927: add_native_method("apply-taint", Method::CT_ANY, _apply_taint, 1, 2, Method::CO_WITHOUT_FRAME);
928:
1.216 moko 929: // ^process{code}
930: // ^process[context]{code}[options hash]
1.146 paf 931: add_native_method("process", Method::CT_ANY, _process, 1, 3);
1.1 paf 932:
933: // ^rem{code}
1.185 misha 934: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 935:
936: // ^while(condition){code}
1.185 misha 937: add_native_method("while", Method::CT_ANY, _while, 2, 3, Method::CO_WITHOUT_FRAME);
1.1 paf 938:
1.216 moko 939: // ^use[file[;options hash]]
940: add_native_method("use", Method::CT_ANY, _use, 1, 2);
1.1 paf 941:
1.164 paf 942: // ^break[]
1.227 moko 943: // ^break(condition)
944: add_native_method("break", Method::CT_ANY, _break, 0, 1, Method::CO_WITHOUT_FRAME);
1.185 misha 945:
1.164 paf 946: // ^continue[]
1.227 moko 947: // ^continue(condition)
948: add_native_method("continue", Method::CT_ANY, _continue, 0, 1, Method::CO_WITHOUT_FRAME);
1.185 misha 949:
1.54 paf 950: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.185 misha 951: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1, Method::CO_WITHOUT_WCONTEXT);
1.1 paf 952:
953: // ^eval(expr)
954: // ^eval(expr)[format]
1.185 misha 955: add_native_method("eval", Method::CT_ANY, _eval, 1, 2, Method::CO_WITHOUT_FRAME);
1.52 parser 956:
1.1 paf 957: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 958: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
959:
1.63 paf 960:
1.136 paf 961: // ^cache[file_spec](time){code}[{catch code}] time=0 no cache
1.65 paf 962: // ^cache[file_spec] delete cache
1.161 paf 963: // ^cache[] get current expiration time
964: add_native_method("cache", Method::CT_ANY, _cache, 0, 4);
1.63 paf 965:
1.28 parser 966: // switch
967:
968: // ^switch[value]{cases}
1.185 misha 969: add_native_method("switch", Method::CT_ANY, _switch, 2, 2, Method::CO_WITHOUT_FRAME);
1.28 parser 970:
971: // ^case[value]{code}
1.185 misha 972: add_native_method("case", Method::CT_ANY, _case, 2, 10000, Method::CO_WITHOUT_FRAME);
1.74 paf 973:
974: // try-catch
975:
976: // ^try{code}{catch code}
1.185 misha 977: add_native_method("try", Method::CT_ANY, _try_operator, 2, 3, Method::CO_WITHOUT_FRAME);
1.74 paf 978: // ^throw[$exception hash]
979: // ^throw[type;source;comment]
980: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
981:
1.150 paf 982: add_native_method("sleep", Method::CT_ANY, _sleep_operator, 1, 1);
1.10 paf 983: }
1.11 paf 984:
985: // constructor & configurator
1.1 paf 986:
1.129 paf 987: VStateless_class& VClassMAIN_create() {
988: return *new VClassMAIN;
1.1 paf 989: }
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