Annotation of parser3/src/classes/op.C, revision 1.252
1.1 paf 1: /** @file
1.9 paf 2: Parser: parser @b operators.
1.1 paf 3:
1.251 moko 4: Copyright (c) 2001-2017 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:
1.252 ! moko 21: volatile const char * IDENT_OP_C="$Id: op.C,v 1.251 2017/02/07 22:00:29 moko Exp $";
1.18 parser 22:
1.10 paf 23: // defines
24:
1.82 paf 25: #define CASE_DEFAULT_VALUE "DEFAULT"
1.11 paf 26:
1.10 paf 27: // class
28:
1.113 paf 29: class VClassMAIN: public VClass {
1.10 paf 30: public:
1.129 paf 31: VClassMAIN();
1.10 paf 32: };
33:
1.129 paf 34: // defines for statics
35:
36: #define SWITCH_DATA_NAME "SWITCH-DATA"
37: #define CACHE_DATA_NAME "CACHE-DATA"
1.164 paf 38:
1.129 paf 39: #define EXCEPTION_VAR_NAME "exception"
40:
41: // statics
42:
43: //^switch ^case
44: static const String switch_data_name(SWITCH_DATA_NAME);
45: //^cache
46: static const String cache_data_name(CACHE_DATA_NAME);
47:
48: static const String exception_var_name(EXCEPTION_VAR_NAME);
49:
1.164 paf 50:
1.136 paf 51: // local defines
52:
53: #define CACHE_EXCEPTION_HANDLED_CACHE_NAME "cache"
54:
1.129 paf 55: // helpers
56:
1.187 misha 57: class Untaint_lang_name2enum: public HashString<String::Language> {
1.129 paf 58: public:
59: Untaint_lang_name2enum() {
1.223 moko 60: #define ULN(name, LANG) put(name, (value_type)(String::L_##LANG));
1.198 misha 61: ULN("clean", CLEAN);
1.129 paf 62: ULN("as-is", AS_IS);
63: ULN("optimized-as-is", AS_IS|String::L_OPTIMIZE_BIT);
64: ULN("file-spec", FILE_SPEC);
65: ULN("http-header", HTTP_HEADER);
66: ULN("mail-header", MAIL_HEADER);
67: ULN("uri", URI);
68: ULN("sql", SQL);
69: ULN("js", JS);
70: ULN("xml", XML);
71: ULN("optimized-xml", XML|String::L_OPTIMIZE_BIT);
72: ULN("html", HTML);
73: ULN("optimized-html", HTML|String::L_OPTIMIZE_BIT);
1.159 paf 74: ULN("regex", REGEX);
1.193 misha 75: ULN("parser-code", PARSER_CODE);
1.204 misha 76: ULN("json", JSON);
1.129 paf 77: #undef ULN
78: }
79: } untaint_lang_name2enum;
80:
1.10 paf 81: // methods
82:
1.129 paf 83: static void _if(Request& r, MethodParams& params) {
1.200 moko 84: size_t max_param=params.count()-1;
85: size_t i=0;
86: do {
87: bool condition=params.as_bool(i, "condition must be expression", r);
88: if(condition) {
1.238 moko 89: r.process_write(params[i+1]);
1.200 moko 90: return;
91: }
92: i+=2;
93: } while (i < max_param);
94:
95: if(i == max_param)
1.238 moko 96: r.process_write(params[i]);
1.1 paf 97: }
98:
1.210 moko 99: String::Language get_untaint_lang(const String& lang_name){
1.175 misha 100: String::Language lang=untaint_lang_name2enum.get(lang_name);
101: if(!lang)
1.210 moko 102: throw Exception(PARSER_RUNTIME, &lang_name, "invalid taint language");
1.175 misha 103: return lang;
104: }
105:
1.129 paf 106: static void _untaint(Request& r, MethodParams& params) {
107: String::Language lang;
108: if(params.count()==1)
1.241 moko 109: lang=String::L_AS_IS; // mark as simply 'as-is'. useful in html from sql
1.175 misha 110: else
1.210 moko 111: lang=get_untaint_lang(params.as_string(0, "lang must be string"));
1.1 paf 112:
1.241 moko 113: Value& vbody=params.as_junction(params.count()-1, "body must be code");
114: Value& result=r.process(vbody);
115:
116: if(const String* string=result.get_string()){
117: String &untainted=*new String();
118: string->append_to(untainted, lang); // mark all tainted to specified language
1.243 moko 119: r.write(untainted);
1.241 moko 120: } else
1.243 moko 121: r.write(result); // this is not normal, just backward compatibility
1.1 paf 122: }
123:
1.129 paf 124: static void _taint(Request& r, MethodParams& params) {
125: String::Language lang;
126: if(params.count()==1)
1.175 misha 127: lang=String::L_TAINTED; // mark as simply 'tainted'. useful in table:create
128: else
1.210 moko 129: lang=get_untaint_lang(params.as_string(0, "lang must be string"));
1.1 paf 130:
131: {
1.129 paf 132: Value& vbody=params.as_no_junction(params.count()-1, "body must not be code");
1.1 paf 133:
1.191 misha 134: String result(vbody.as_string(), lang); // force result language to specified
1.243 moko 135: r.write(result);
1.1 paf 136: }
137: }
138:
1.205 moko 139: static void _apply_taint(Request& r, MethodParams& params) {
1.210 moko 140: String::Language lang=params.count()==1 ? String::L_AS_IS : get_untaint_lang(params.as_string(0, "lang must be string"));
1.205 moko 141: const String &sbody=params.as_string(params.count()-1, "body must be string");
1.213 moko 142: String::Body result_body=sbody.cstr_to_string_body_untaint(lang, r.connection(false), &r.charsets);
1.243 moko 143: r.write(*new String(result_body, String::L_AS_IS));
1.205 moko 144: }
145:
1.129 paf 146: static void _process(Request& r, MethodParams& params) {
147: Method* main_method;
148:
149: size_t index=0;
150: Value* target_self;
151: Value& maybe_target_self=params[index];
152: if(maybe_target_self.get_string() || maybe_target_self.get_junction())
153: target_self=&r.get_method_frame()->caller()->self();
154: else {
1.233 moko 155: target_self=&maybe_target_self;
156: if(params.count()==1)
157: throw Exception(PARSER_RUNTIME, 0, "no body specified");
158: index++;
1.129 paf 159: }
160:
1.1 paf 161: {
1.197 misha 162: VStateless_class *target_class=target_self->get_class();
1.116 paf 163: if(!target_class)
1.232 moko 164: throw Exception(PARSER_RUNTIME, 0, "no target class");
1.114 paf 165:
1.1 paf 166: // temporary zero @main so to maybe-replace it in processed code
1.129 paf 167: Temp_method temp_method_main(*target_class, main_method_name, 0);
168:
169: const String* main_alias=0;
1.146 paf 170: const String* file_alias=0;
171: int line_no_alias_offset=0;
1.216 moko 172: bool allow_class_replace=false;
1.211 misha 173:
174: size_t options_index=index+1;
175: if(options_index<params.count())
176: if(HashStringValue* options=params.as_hash(options_index)) {
1.216 moko 177:
1.211 misha 178: int valid_options=0;
1.216 moko 179: for(HashStringValue::Iterator i(*options); i; i.next() ){
180:
181: String::Body key=i.key();
182: Value* value=i.value();
183:
184: if(key == "main") {
185: valid_options++;
186: main_alias=&value->as_string();
187: } else if(key == "file") {
188: valid_options++;
189: file_alias=&value->as_string();
190: } else if(key == "lineno") {
191: valid_options++;
192: line_no_alias_offset=value->as_int();
193: } else if(key == "replace") {
194: valid_options++;
1.236 moko 195: allow_class_replace=r.process(*value).as_bool();
1.216 moko 196: }
1.211 misha 197: }
1.216 moko 198:
1.211 misha 199: if(valid_options!=options->count())
200: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
1.146 paf 201: }
1.129 paf 202:
1.232 moko 203: uint processe_file_no=file_alias ? r.register_file(r.absolute(*file_alias)) : pseudo_file_no__process;
1.146 paf 204: // process...{string}
205: Value& vjunction=params.as_junction(index, "body must be code");
206: // evaluate source to process
207: const String& source=r.process_to_string(vjunction);
1.216 moko 208:
209: Temp_class_replace class_replace(r, allow_class_replace);
210:
1.241 moko 211: r.use_buf(*target_class, source.untaint_cstr(String::L_PARSER_CODE, r.connection(false)), main_alias, processe_file_no, line_no_alias_offset);
1.1 paf 212:
1.73 paf 213: // main_method
1.129 paf 214: main_method=target_class->get_method(main_method_name);
1.73 paf 215: }
216: // after restoring current-request-lang
217: // maybe-execute @main[]
218: if(main_method) {
1.244 moko 219: METHOD_FRAME_ACTION(*main_method, r.get_method_frame()->caller(), *target_self, {
220: frame.empty_params();
221: r.call(frame);
222: r.write(frame.result());
223: });
1.1 paf 224: }
225: }
226:
1.138 paf 227: static void _rem(Request&, MethodParams& params) {
1.129 paf 228: params.as_junction(0, "body must be code");
1.1 paf 229: }
230:
1.129 paf 231: static void _while(Request& r, MethodParams& params) {
1.196 misha 232: InCycle temp(r);
1.164 paf 233:
1.170 misha 234: Value& vcondition=params.as_expression(0, "condition must be number, bool or expression");
235:
1.162 paf 236: Value& body_code=params.as_junction(1, "body must be code");
237: Value* delim_maybe_code=params.count()>2?¶ms[2]:0;
1.1 paf 238:
239: // while...
240: int endless_loop_count=0;
1.186 misha 241: if(delim_maybe_code){ // delimiter set
1.185 misha 242: bool need_delim=false;
243: while(true) {
1.235 moko 244: if(++endless_loop_count>=pa_loop_limit) // endless loop?
245: throw Exception(PARSER_RUNTIME, 0, "endless loop detected");
1.185 misha 246:
1.237 moko 247: if(!r.process(vcondition).as_bool())
1.185 misha 248: break;
1.1 paf 249:
1.234 moko 250: Value& sv_processed=r.process(body_code);
1.249 moko 251: TempSkip4Delimiter skip(r);
1.186 misha 252:
1.185 misha 253: const String* s_processed=sv_processed.get_string();
1.186 misha 254: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 255: if(need_delim) // need delim & iteration produced string?
1.243 moko 256: r.write(r.process(*delim_maybe_code));
1.185 misha 257: else
258: need_delim=true;
259: }
1.243 moko 260: r.write(sv_processed);
1.1 paf 261:
1.249 moko 262: if(skip.check_break())
1.185 misha 263: break;
1.162 paf 264: }
1.185 misha 265: } else {
266: while(true) {
1.235 moko 267: if(++endless_loop_count>=pa_loop_limit) // endless loop?
268: throw Exception(PARSER_RUNTIME, 0, "endless loop detected");
1.185 misha 269:
1.237 moko 270: if(!r.process(vcondition).as_bool())
1.185 misha 271: break;
1.164 paf 272:
1.185 misha 273: r.process_write(body_code);
274:
1.249 moko 275: if(r.check_skip_break())
1.185 misha 276: break;
277: }
1.1 paf 278: }
279: }
280:
1.129 paf 281: static void _use(Request& r, MethodParams& params) {
1.171 misha 282: Value& vfile=params.as_no_junction(0, FILE_NAME_MUST_NOT_BE_CODE);
1.199 misha 283:
1.216 moko 284: bool allow_class_replace=false;
1.246 moko 285: const String* use_origin=0;
1.216 moko 286:
287: if(params.count()==2)
288: if(HashStringValue* options=params.as_hash(1)) {
289: int valid_options=0;
290: for(HashStringValue::Iterator i(*options); i; i.next() ){
291:
292: String::Body key=i.key();
293: Value* value=i.value();
294:
295: if(key == "replace") {
296: valid_options++;
1.236 moko 297: allow_class_replace=r.process(*value).as_bool();
1.216 moko 298: }
299:
1.246 moko 300: if(key == "origin") {
301: valid_options++;
302: use_origin=&value->as_string();
303: }
304:
305: if(valid_options!=options->count())
306: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
1.216 moko 307: }
308: }
309:
1.246 moko 310: if(!use_origin)
311: if(VMethodFrame* caller=r.get_method_frame()->caller())
1.247 moko 312: use_origin=r.get_method_filespec(&caller->method);
1.246 moko 313:
1.216 moko 314: Temp_class_replace class_replace(r, allow_class_replace);
315:
1.246 moko 316: r.use_file(r.main_class, vfile.as_string(), use_origin);
1.1 paf 317: }
318:
1.164 paf 319: static void set_skip(Request& r, Request::Skip askip) {
1.196 misha 320: if(!r.get_in_cycle())
1.227 moko 321: throw Exception(askip==Request::SKIP_BREAK ? "parser.break" : "parser.continue", 0, "without cycle");
1.164 paf 322: r.set_skip(askip);
323: }
324:
1.227 moko 325: static void _break(Request& r, MethodParams& params) {
326: if(!params.count() || params.as_bool(0, "condition must be expression", r)) set_skip(r, Request::SKIP_BREAK);
1.164 paf 327: }
328:
1.227 moko 329: static void _continue(Request& r, MethodParams& params) {
330: if(!params.count() || params.as_bool(0, "condition must be expression", r)) set_skip(r, Request::SKIP_CONTINUE);
1.164 paf 331: }
332:
1.249 moko 333: static void _return(Request& r, MethodParams& params) {
1.250 moko 334: VMethodFrame& caller=*r.get_method_frame()->caller();
1.249 moko 335: if(params.count())
1.250 moko 336: r.put_element(caller, Symbols::RESULT_SYMBOL, ¶ms[0]);
337: r.set_skip_return(caller);
1.249 moko 338: }
339:
1.129 paf 340: static void _for(Request& r, MethodParams& params) {
1.196 misha 341: InCycle temp(r);
1.164 paf 342:
1.129 paf 343: const String& var_name=params.as_string(0, "var name must be string");
344: int from=params.as_int(1, "from must be int", r);
345: int to=params.as_int(2, "to must be int", r);
1.186 misha 346: Value& body_code=params.as_junction(3, "body must be code");
1.129 paf 347: Value* delim_maybe_code=params.count()>4?¶ms[4]:0;
1.1 paf 348:
1.235 moko 349: if(to-from>=pa_loop_limit) // too long loop?
350: throw Exception(PARSER_RUNTIME, 0, "endless loop detected");
1.57 paf 351:
1.129 paf 352: VInt* vint=new VInt(0);
1.154 paf 353:
354: VMethodFrame& caller=*r.get_method_frame()->caller();
1.218 moko 355: r.put_element(caller, var_name, vint);
1.186 misha 356: if(delim_maybe_code){ // delimiter set
1.185 misha 357: bool need_delim=false;
358:
359: for(int i=from; i<=to; i++) {
360: vint->set_int(i);
361:
1.234 moko 362: Value& sv_processed=r.process(body_code);
1.249 moko 363: TempSkip4Delimiter skip(r);
1.186 misha 364:
1.185 misha 365: const String* s_processed=sv_processed.get_string();
1.186 misha 366: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 367: if(need_delim) // need delim & iteration produced string?
1.243 moko 368: r.write(r.process(*delim_maybe_code));
1.185 misha 369: else
370: need_delim=true;
371: }
1.243 moko 372: r.write(sv_processed);
1.1 paf 373:
1.249 moko 374: if(skip.check_break())
1.185 misha 375: break;
1.1 paf 376: }
1.185 misha 377: } else {
378: for(int i=from; i<=to; i++) {
379: vint->set_int(i);
380:
381: r.process_write(body_code);
1.164 paf 382:
1.249 moko 383: if(r.check_skip_break())
1.185 misha 384: break;
385: }
1.1 paf 386: }
387: }
388:
1.129 paf 389: static void _eval(Request& r, MethodParams& params) {
390: Value& expr=params.as_junction(0, "need expression");
1.1 paf 391: // evaluate expresion
1.237 moko 392: Value& value_result=r.process(expr).as_expr_result();
1.129 paf 393: if(params.count()>1) {
1.177 misha 394: const String& fmt=params.as_string(1, "fmt must be string").trim();
395: if(fmt.is_empty()){
1.243 moko 396: r.write(value_result);
1.177 misha 397: } else {
1.243 moko 398: r.write(String(format(value_result.as_double(), fmt.cstrm())));
1.177 misha 399: }
1.91 paf 400: } else
1.243 moko 401: r.write(value_result);
1.1 paf 402: }
403:
1.129 paf 404: static void _connect(Request& r, MethodParams& params) {
405: Value& url=params.as_no_junction(0, "url must not be code");
406: Value& body_code=params.as_junction(1, "body must be code");
1.1 paf 407:
1.129 paf 408: Table* protocol2driver_and_client=0;
1.197 misha 409: if(Value* sql=r.main_class.get_element(String(MAIN_SQL_NAME))) {
410: if(Value* element=sql->get_element(String(MAIN_SQL_DRIVERS_NAME))) {
1.113 paf 411: protocol2driver_and_client=element->get_table();
412: }
413: }
1.11 paf 414:
1.1 paf 415: // connect
1.142 paf 416: SQL_Connection* connection=SQL_driver_manager->get_connection(url.as_string(),
1.144 paf 417: protocol2driver_and_client,
1.180 misha 418: r.charsets.source().NAME().cstr(),
419: r.request_info.document_root);
1.1 paf 420:
1.214 moko 421: Temp_connection temp_connection(r, connection);
1.63 paf 422:
1.1 paf 423: // execute body
1.53 parser 424: try {
1.189 misha 425: r.process_write(body_code);
1.129 paf 426: connection->commit();
427: connection->close();
1.75 paf 428: } catch(...) { // process problem
1.129 paf 429: connection->rollback();
430: connection->close();
431: rethrow;
1.1 paf 432: }
433: }
434:
1.41 parser 435: #ifndef DOXYGEN
1.129 paf 436: class Switch_data: public PA_Object {
437: public:
438: Request& r;
1.181 misha 439: const String* searching_string;
440: double searching_double;
1.207 misha 441: bool searching_bool;
1.129 paf 442: Value* found;
443: Value* _default;
444: public:
445: Switch_data(Request& ar, Value& asearching):
1.181 misha 446: r(ar)
447: {
448: if(asearching.is_string() || asearching.is_void()){
449: searching_string=&asearching.as_string();
450: searching_double=0;
1.207 misha 451: searching_bool=false;
1.181 misha 452: } else {
453: searching_string=0;
454: searching_double=asearching.as_double();
1.207 misha 455: searching_bool=asearching.is_bool();
1.181 misha 456: }
457: }
1.28 parser 458: };
1.41 parser 459: #endif
1.129 paf 460: static void _switch(Request& r, MethodParams& params) {
1.236 moko 461: Switch_data* data=new Switch_data(r, r.process(params[0]));
1.215 moko 462: Temp_hash_value<HashString<void*>, void*> switch_data_setter(&r.classes_conf, switch_data_name, data);
1.28 parser 463:
1.129 paf 464: Value& cases_code=params.as_junction(1, "switch cases must be code");
1.82 paf 465: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
466: // because of stacked WWrapper used there as wcontext
1.237 moko 467: r.process(cases_code);
1.147 paf 468: if(Value* selected_code=data->found? data->found: data->_default)
1.245 moko 469: r.process_write(*selected_code);
1.28 parser 470: }
471:
1.129 paf 472: static void _case(Request& r, MethodParams& params) {
473: Switch_data* data=static_cast<Switch_data*>(r.classes_conf.get(switch_data_name));
1.38 parser 474: if(!data)
1.166 misha 475: throw Exception(PARSER_RUNTIME,
1.129 paf 476: 0,
1.38 parser 477: "without switch");
1.28 parser 478:
1.181 misha 479: if(data->found) // matches already was found
480: return;
481:
1.129 paf 482: int count=params.count();
1.184 misha 483: Value* code=¶ms.as_expression(--count, "case result must be code");
484:
485: #ifdef USE_DESTRUCTORS
486: Junction *j=code->get_junction();
487: if (j){
488: code=new VJunction(j->self,j->method,j->method_frame,j->rcontext,j->wcontext,j->code);
489: if (j->wcontext) j->wcontext->attach_junction((VJunction *)code);
490: }
491: #endif
1.83 paf 492:
1.181 misha 493: for(int i=0; i<count; i++){
1.236 moko 494: Value& value=r.process(params[i]);
1.28 parser 495:
1.181 misha 496: if(value.is_string() && value.as_string() == CASE_DEFAULT_VALUE){
1.184 misha 497: data->_default=code;
1.181 misha 498: continue;
1.28 parser 499: }
500:
501: bool matches;
1.181 misha 502: if(data->searching_string)
503: matches=(*data->searching_string) == value.as_string();
1.207 misha 504: else if(data->searching_bool || value.is_bool())
505: matches=(data->searching_double != 0) == value.as_bool();
1.28 parser 506: else
1.181 misha 507: matches=data->searching_double == value.as_double();
1.82 paf 508:
1.181 misha 509: if(matches){
1.184 misha 510: data->found=code;
1.28 parser 511: break;
512: }
513: }
514: }
1.136 paf 515: #ifndef DOXYGEN
516: struct Try_catch_result {
1.234 moko 517: ValueRef processed_code;
1.136 paf 518: const String* exception_should_be_handled;
519:
520: Try_catch_result(): exception_should_be_handled(0) {}
521: };
1.229 moko 522:
523: /// Auto-object used for temporary changing Request::skip.
524: class Temp_skip {
525: Request& frequest;
526: Request::Skip saved_skip;
527: public:
528: Temp_skip(Request& arequest) : frequest(arequest), saved_skip(arequest.get_skip()) {
529: arequest.set_skip(Request::SKIP_NOTHING);
530: }
531: ~Temp_skip() {
532: if(frequest.get_skip() == Request::SKIP_NOTHING)
533: frequest.set_skip(saved_skip);
534: }
535: };
1.136 paf 536: #endif
537:
538: /// used by ^try and ^cache, @returns $exception.handled[string] if any
539: template<class I>
1.234 moko 540: static Try_catch_result try_catch(Request& r, Value& body_code(Request&, I), I info, Value* catch_code, bool could_be_handled_by_caller=false) {
1.136 paf 541: Try_catch_result result;
1.179 misha 542:
1.228 moko 543: // minor bug: context not restored if only finally code is present, see #1062
1.136 paf 544: if(!catch_code) {
545: result.processed_code=body_code(r, info);
546: return result;
547: }
548:
549: // taking snapshot of try-context
550: Request_context_saver try_context(r);
551: try {
552: result.processed_code=body_code(r, info);
553: } catch(const Exception& e) {
1.230 moko 554: Request_context_saver throw_context(r); // remembering exception stack trace
555:
1.136 paf 556: Request::Exception_details details=r.get_details(e);
1.230 moko 557:
1.228 moko 558: try_context.restore(); // restoring try-context for code after try and catch-code
1.136 paf 559:
1.228 moko 560: {
561: Temp_value_element temp(r, *catch_code->get_junction()->method_frame, exception_var_name, &details.vhash);
1.229 moko 562: Temp_skip temp_skip(r);
1.228 moko 563: result.processed_code=r.process(*catch_code);
564: }
1.136 paf 565:
1.228 moko 566: // retriving $exception.handled
1.136 paf 567: Value* vhandled=details.vhash.hash().get(exception_handled_part_name);
568:
569: bool bhandled=false;
570: if(vhandled) {
571: if(vhandled->is_string()) { // not simple $exception.handled(1/0)?
1.228 moko 572: if(bhandled=could_be_handled_by_caller) { // and we can possibly handle it
1.160 paf 573: result.exception_should_be_handled=vhandled->get_string(); // considering 'recovered' and let the caller recover
574: }
575: } else
1.179 misha 576: bhandled=vhandled->as_bool();
1.136 paf 577: }
578:
1.230 moko 579: if(!bhandled){
580: throw_context.restore(); // restoring exception stack trace creared by try_context.restore()
1.136 paf 581: rethrow;
1.230 moko 582: }
1.136 paf 583: }
1.179 misha 584:
1.136 paf 585: return result;
586: }
1.28 parser 587:
1.234 moko 588: static Value& process_try_body_code(Request& r, Value* body_code) {
1.222 moko 589: return r.process(*body_code);
590: }
591:
1.63 paf 592: // cache--
593:
594: // consts
595:
1.152 paf 596: const int DATA_STRING_SERIALIZED_VERSION=0x0006;
1.63 paf 597:
598: // helper types
599:
600: #ifndef DOXYGEN
601: struct Data_string_serialized_prolog {
602: int version;
1.79 paf 603: time_t expires;
1.63 paf 604: };
605: #endif
606:
1.68 paf 607: void cache_delete(const String& file_spec) {
1.167 misha 608: file_delete(file_spec, false/*fail_on_problem*/);
1.63 paf 609: }
1.69 paf 610:
611: #ifndef DOXYGEN
1.135 paf 612: struct Cache_scope {
1.129 paf 613: public:
1.79 paf 614: time_t expires;
1.135 paf 615: const String* body_from_disk;
1.79 paf 616: };
1.69 paf 617: struct Locked_process_and_cache_put_action_info {
618: Request *r;
1.136 paf 619: Cache_scope *scope;
1.167 misha 620: Value* body_code;
621: Value* catch_code;
1.136 paf 622: const String* processed_code;
1.69 paf 623: };
624: #endif
1.136 paf 625:
626:
627:
1.234 moko 628: static Value& process_cache_body_code(Request& r, Value* body_code) {
629: return r.process(*body_code);
1.136 paf 630: }
631:
1.129 paf 632: /* @todo maybe network order worth spending some effort?
633: don't bothering myself with network byte order,
634: am not planning to be able to move resulting file across platforms
635: */
1.69 paf 636: static void locked_process_and_cache_put_action(int f, void *context) {
637: Locked_process_and_cache_put_action_info& info=
638: *static_cast<Locked_process_and_cache_put_action_info *>(context);
1.129 paf 639:
1.160 paf 640: const String* body_from_disk=info.scope->body_from_disk;
1.69 paf 641: // body->process
1.136 paf 642: Try_catch_result result=try_catch(*info.r,
643: process_cache_body_code, info.body_code,
1.160 paf 644: info.catch_code, body_from_disk!=0 /*we have something old=we can handle=recover later*/);
1.136 paf 645:
646: if(result.exception_should_be_handled) {
647: if(*result.exception_should_be_handled==CACHE_EXCEPTION_HANDLED_CACHE_NAME) {
1.160 paf 648: assert(body_from_disk);
649: info.processed_code=body_from_disk;
1.136 paf 650: } else
1.166 misha 651: throw Exception(PARSER_RUNTIME,
1.136 paf 652: result.exception_should_be_handled,
1.219 moko 653: "$" EXCEPTION_VAR_NAME "." EXCEPTION_HANDLED_PART_NAME " value must be "
654: "either boolean or string '" CACHE_EXCEPTION_HANDLED_CACHE_NAME "'");
1.136 paf 655: } else
1.234 moko 656: info.processed_code=&((Value &)result.processed_code).as_string();
1.69 paf 657:
1.79 paf 658: // expiration time not spoiled by ^cache(0) or something?
1.136 paf 659: if(info.scope->expires > time(0)) {
1.79 paf 660: // string -serialize> buffer
1.136 paf 661: String::Cm serialized=info.processed_code->serialize(
1.129 paf 662: sizeof(Data_string_serialized_prolog));
1.79 paf 663: Data_string_serialized_prolog& prolog=
1.129 paf 664: *reinterpret_cast<Data_string_serialized_prolog *>(serialized.str);
1.79 paf 665: prolog.version=DATA_STRING_SERIALIZED_VERSION;
1.136 paf 666: prolog.expires=info.scope->expires;
1.79 paf 667:
668: // buffer -write> file
1.129 paf 669: write(f, serialized.str, serialized.length);
1.79 paf 670: } else // expired!
1.136 paf 671: info.scope->expires=0; // flag it so that could be easily checked by caller
1.69 paf 672: }
1.129 paf 673: const String* locked_process_and_cache_put(Request& r,
1.128 paf 674: Value& body_code,
1.136 paf 675: Value* catch_code,
676: Cache_scope& scope,
677: const String& file_spec)
678: {
1.140 paf 679: Locked_process_and_cache_put_action_info info={&r, &scope, &body_code, catch_code, 0};
1.69 paf 680:
1.129 paf 681: const String* result=file_write_action_under_lock(
1.69 paf 682: file_spec,
1.168 misha 683: "cache_put",
684: locked_process_and_cache_put_action,
685: &info,
1.69 paf 686: false/*as_text*/,
687: false/*do_append*/,
1.173 misha 688: false/*block == don't wait till other thread release lock*/,
689: false/*dun throw exception if lock failed*/) ? info.processed_code: 0;
1.168 misha 690:
1.100 paf 691: time_t now=time(0);
1.136 paf 692: if(scope.expires<=now)
1.79 paf 693: cache_delete(file_spec);
694: return result;
1.63 paf 695: }
1.229 moko 696:
1.137 paf 697: #ifndef DOXYGEN
1.135 paf 698: struct Cache_get_result {
699: const String* body;
700: bool expired;
1.137 paf 701: };
702: #endif
1.229 moko 703:
1.137 paf 704: static Cache_get_result cache_get(Request_charsets& charsets, const String& file_spec, time_t now) {
1.140 paf 705: Cache_get_result result={0, false};
1.135 paf 706:
1.252 ! moko 707: File_read_result file=file_read(charsets, file_spec, false /*as_text*/, 0, /*no params*/ false /*fail_on_read_problem*/);
! 708: if(file.success && file.length /*ignore reads which are empty due to non-unary open+lockEX conflict with lockSH*/) {
! 709:
! 710: Data_string_serialized_prolog& prolog = *reinterpret_cast<Data_string_serialized_prolog *>(file.str);
! 711:
1.135 paf 712: String* body=new String;
1.252 ! moko 713: if(file.length>=sizeof(Data_string_serialized_prolog) && prolog.version==DATA_STRING_SERIALIZED_VERSION) {
1.135 paf 714: if(body->deserialize(sizeof(Data_string_serialized_prolog), file.str, file.length)) {
715: result.body=body;
716: result.expired=prolog.expires <= now;
717: }
718: }
1.72 paf 719: }
1.63 paf 720:
1.135 paf 721: return result;
1.63 paf 722: }
1.252 ! moko 723:
! 724: static time_t as_expires(Request& r, MethodParams& params, int index, time_t now) {
1.79 paf 725: time_t result;
1.197 misha 726: if(Value* vdate=params[index].as(VDATE_TYPE))
1.220 moko 727: result=(time_t)(static_cast<VDate*>(vdate)->get_time());
1.79 paf 728: else
1.129 paf 729: result=now+(time_t)params.as_double(index, "lifespan must be date or number", r);
1.79 paf 730:
731: return result;
732: }
1.229 moko 733:
1.129 paf 734: static const String& as_file_spec(Request& r, MethodParams& params, int index) {
735: return r.absolute(params.as_string(index, "filespec must be string"));
1.79 paf 736: }
1.229 moko 737:
1.129 paf 738: static void _cache(Request& r, MethodParams& params) {
1.173 misha 739: if(params.count()==0) {
740: // ^cache[] -- return current expiration time
1.158 paf 741: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
742: if(!scope)
1.221 moko 743: throw Exception(PARSER_RUNTIME, 0, "expire-time get without cache");
1.243 moko 744: r.write(*new VDate((pa_time_t)scope->expires));
1.158 paf 745: return;
746: }
747:
1.79 paf 748: time_t now=time(0);
749:
1.129 paf 750: if(params.count()==1) {
1.173 misha 751: // ^cache[filename] ^cache(seconds) ^cache[expires date]
1.129 paf 752: if(params[0].is_string()) { // filename?
1.79 paf 753: cache_delete(as_file_spec(r, params, 0));
754: return;
755: }
756:
757: // secods|expires date
1.135 paf 758: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
759: if(!scope)
1.166 misha 760: throw Exception(PARSER_RUNTIME,
1.129 paf 761: 0,
1.79 paf 762: "expire-time reducing instruction without cache");
763:
1.129 paf 764: time_t expires=as_expires(r, params, 0, now);
1.135 paf 765: if(expires < scope->expires)
766: scope->expires=expires;
1.79 paf 767:
768: return;
1.149 paf 769: } else if(params.count()<3)
1.166 misha 770: throw Exception(PARSER_RUNTIME,
1.149 paf 771: 0,
772: "invalid number of parameters");
1.63 paf 773:
774: // file_spec, expires, body code
1.172 misha 775: const String& file_spec=as_file_spec(r, params, 0);
1.65 paf 776:
1.141 paf 777: Cache_scope scope={as_expires(r, params, 1, now), 0};
1.135 paf 778:
1.215 moko 779: Temp_hash_value<HashString<void*>, void*> cache_scope_setter(&r.classes_conf, cache_data_name, &scope);
1.136 paf 780: Value& body_code=params.as_junction(2, "body_code must be code");
781: Value* catch_code=0;
782: if(params.count()>3)
783: catch_code=¶ms.as_junction(3, "catch_code must be code");
1.63 paf 784:
1.168 misha 785: if(scope.expires>now) {
786: Cache_get_result cached=cache_get(r.charsets, file_spec, now);
1.69 paf 787:
1.168 misha 788: if(cached.body) { // have cached copy
1.174 misha 789: if(cached.expired) {
790: scope.body_from_disk=cached.body; // storing for user to retrive it with ^cache[]
791: } else {
792: // and it's not expired yet write it out
1.243 moko 793: r.write(*cached.body);
1.168 misha 794: // happy with it
795: return;
796: }
797: }
798:
799: // no cached info or it's already expired
1.173 misha 800:
801: // trying to process it under lock and store result in file
1.174 misha 802: const String* processed_body=locked_process_and_cache_put(r, body_code, catch_code, scope, file_spec);
1.173 misha 803: if(processed_body){
1.174 misha 804: // write it out
1.243 moko 805: r.write(*processed_body);
1.174 misha 806: // happy with it
807: return;
1.173 misha 808: } else {
809: // we fail while get exclusive lock. nvm, we just execute body_code a bit later
1.174 misha 810: }
1.69 paf 811: } else {
1.79 paf 812: // instructed not to cache; forget cached copy
1.68 paf 813: cache_delete(file_spec);
1.69 paf 814: }
1.168 misha 815:
1.222 moko 816: // process without caching
817: if(catch_code){
818: Try_catch_result result=try_catch(r, process_try_body_code, &body_code, catch_code);
1.243 moko 819: r.write(result.processed_code);
1.222 moko 820: } else {
1.243 moko 821: r.write(r.process_to_string(body_code));
1.222 moko 822: }
1.63 paf 823: }
824:
1.129 paf 825: static void _try_operator(Request& r, MethodParams& params) {
826: Value& body_code=params.as_junction(0, "body_code must be code");
827: Value& catch_code=params.as_junction(1, "catch_code must be code");
1.179 misha 828: Value* finally_code=(params.count()==3) ? ¶ms.as_junction(2, "finally_code must be code") : 0;
829:
830: Try_catch_result result;
1.229 moko 831:
1.179 misha 832: try{
1.229 moko 833: // process try and catch code
1.222 moko 834: result=try_catch(r, process_try_body_code, &body_code, &catch_code);
1.179 misha 835: } catch(...){
1.229 moko 836: // process finally code but ignore the result
837: if(finally_code){
838: Temp_skip temp(r);
1.248 moko 839: /* Value &finally_result= */ r.process(*finally_code);
1.229 moko 840: }
1.179 misha 841: rethrow;
842: }
1.74 paf 843:
1.229 moko 844: // process finally code
845: if(finally_code){
846: Temp_skip temp(r);
1.234 moko 847: Value& finally_result=r.process(*finally_code);
1.229 moko 848:
1.234 moko 849: // no exception in try/catch or finally, writing processed body_code or catch_code
1.243 moko 850: r.write(result.processed_code);
1.123 paf 851:
1.234 moko 852: // write out processed finally code
1.243 moko 853: r.write(finally_result);
1.234 moko 854: } else {
855: // no exception in try/catch, writing processed body_code or catch_code
1.243 moko 856: r.write(result.processed_code);
1.234 moko 857: }
1.179 misha 858:
1.74 paf 859: }
860:
1.138 paf 861: static void _throw_operator(Request&, MethodParams& params) {
1.178 misha 862: if(params.count()==1 && !params[0].is_string()) {
1.129 paf 863: if(HashStringValue *hash=params[0].get_hash()) {
864: const char* type=0;
865: if(Value* value=hash->get(exception_type_part_name))
1.78 paf 866: type=value->as_string().cstr();
1.129 paf 867: const String* source=0;
868: if(Value* value=hash->get(exception_source_part_name))
1.74 paf 869: source=&value->as_string();
1.138 paf 870: const char* comment=0;
1.129 paf 871: if(Value* value=hash->get(exception_comment_part_name))
1.74 paf 872: comment=value->as_string().cstr();
873:
1.78 paf 874: throw Exception(type,
1.129 paf 875: source?source:0,
876: "%s", comment?comment:"");
1.74 paf 877: } else
1.166 misha 878: throw Exception(PARSER_RUNTIME,
1.129 paf 879: 0,
1.178 misha 880: "one-param version has hash or string param");
1.74 paf 881: } else {
1.129 paf 882: const char* type=params.as_string(0, "type must be string").cstr();
1.178 misha 883: const String* source=params.count()>1? ¶ms.as_string(1, "source must be string"):0;
884: const char* comment=params.count()>2? params.as_string(2, "comment must be string").cstr():0;
885: throw Exception(type, source, "%s", comment?comment:"");
1.74 paf 886: }
1.132 paf 887: }
1.129 paf 888:
1.150 paf 889: static void _sleep_operator(Request& r, MethodParams& params) {
890: double seconds=params.as_double(0, "seconds must be double", r);
1.206 moko 891: if(seconds>0)
892: pa_sleep((int)trunc(seconds), (int)trunc((seconds-trunc(seconds))*1000000));
1.150 paf 893: }
894:
1.129 paf 895: #if defined(WIN32) && defined(_DEBUG)
896: # define PA_BPT
1.138 paf 897: static void _bpt(Request&, MethodParams&) {
1.129 paf 898: _asm int 3;
899: }
900: #endif
901:
1.10 paf 902: // constructor
903:
1.226 moko 904: VClassMAIN::VClassMAIN(): VClass(MAIN_CLASS_NAME) {
1.129 paf 905:
906: #ifdef PA_BPT
907: // ^bpt[]
908: add_native_method("bpt", Method::CT_ANY, _bpt, 0, 0);
909: #endif
1.121 paf 910:
1.1 paf 911: // ^if(condition){code-when-true}
912: // ^if(condition){code-when-true}{code-when-false}
1.200 moko 913: // ^if(condition){code-when-true} (another condition){code-when-true} ... {code-when-false}
914: add_native_method("if", Method::CT_ANY, _if, 2, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 915:
1.194 misha 916: // ^untaint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
917: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 918:
1.194 misha 919: // ^taint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
920: add_native_method("taint", Method::CT_ANY, _taint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 921:
1.205 moko 922: // ^apply-taint[untaint lang][string]
923: add_native_method("apply-taint", Method::CT_ANY, _apply_taint, 1, 2, Method::CO_WITHOUT_FRAME);
924:
1.216 moko 925: // ^process{code}
926: // ^process[context]{code}[options hash]
1.146 paf 927: add_native_method("process", Method::CT_ANY, _process, 1, 3);
1.1 paf 928:
929: // ^rem{code}
1.185 misha 930: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 931:
932: // ^while(condition){code}
1.185 misha 933: add_native_method("while", Method::CT_ANY, _while, 2, 3, Method::CO_WITHOUT_FRAME);
1.1 paf 934:
1.216 moko 935: // ^use[file[;options hash]]
936: add_native_method("use", Method::CT_ANY, _use, 1, 2);
1.1 paf 937:
1.164 paf 938: // ^break[]
1.227 moko 939: // ^break(condition)
940: add_native_method("break", Method::CT_ANY, _break, 0, 1, Method::CO_WITHOUT_FRAME);
1.185 misha 941:
1.164 paf 942: // ^continue[]
1.227 moko 943: // ^continue(condition)
944: add_native_method("continue", Method::CT_ANY, _continue, 0, 1, Method::CO_WITHOUT_FRAME);
1.185 misha 945:
1.249 moko 946: // ^return[]
947: // ^return[result]
1.250 moko 948: add_native_method("return", Method::CT_ANY, _return, 0, 1);
1.249 moko 949:
1.54 paf 950: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.239 moko 951: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1);
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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