Annotation of parser3/src/classes/op.C, revision 1.258
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:
1.258 ! moko 21: volatile const char * IDENT_OP_C="$Id: op.C,v 1.257 2020/11/03 16:25:48 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:
1.258 ! moko 203: uint processe_file_no=file_alias ? r.register_file(r.full_disk_path(*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:
1.256 moko 284: const String* use_origin=0;
1.216 moko 285: bool allow_class_replace=false;
1.256 moko 286: bool load_auto_p=false;
1.216 moko 287:
288: if(params.count()==2)
289: if(HashStringValue* options=params.as_hash(1)) {
290: int valid_options=0;
291: for(HashStringValue::Iterator i(*options); i; i.next() ){
292:
293: String::Body key=i.key();
294: Value* value=i.value();
295:
1.256 moko 296: if(key == "origin") {
297: valid_options++;
298: use_origin=&value->as_string();
299: }
300:
1.216 moko 301: if(key == "replace") {
302: valid_options++;
1.236 moko 303: allow_class_replace=r.process(*value).as_bool();
1.216 moko 304: }
305:
1.256 moko 306: if(key == "main") {
1.246 moko 307: valid_options++;
1.256 moko 308: load_auto_p=r.process(*value).as_bool();
1.246 moko 309: }
310:
311: if(valid_options!=options->count())
312: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
1.216 moko 313: }
314: }
315:
1.246 moko 316: if(!use_origin)
317: if(VMethodFrame* caller=r.get_method_frame()->caller())
1.247 moko 318: use_origin=r.get_method_filespec(&caller->method);
1.246 moko 319:
1.216 moko 320: Temp_class_replace class_replace(r, allow_class_replace);
321:
1.257 moko 322: r.use_file(vfile.as_string(), use_origin, load_auto_p);
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())
1.227 moko 327: throw Exception(askip==Request::SKIP_BREAK ? "parser.break" : "parser.continue", 0, "without cycle");
1.164 paf 328: r.set_skip(askip);
329: }
330:
1.227 moko 331: static void _break(Request& r, MethodParams& params) {
332: if(!params.count() || params.as_bool(0, "condition must be expression", r)) set_skip(r, Request::SKIP_BREAK);
1.164 paf 333: }
334:
1.227 moko 335: static void _continue(Request& r, MethodParams& params) {
336: if(!params.count() || params.as_bool(0, "condition must be expression", r)) set_skip(r, Request::SKIP_CONTINUE);
1.164 paf 337: }
338:
1.249 moko 339: static void _return(Request& r, MethodParams& params) {
1.250 moko 340: VMethodFrame& caller=*r.get_method_frame()->caller();
1.249 moko 341: if(params.count())
1.255 moko 342: r.put_element(caller, Symbols::RESULT_SYMBOL, &r.process(params[0]));
1.250 moko 343: r.set_skip_return(caller);
1.249 moko 344: }
345:
1.129 paf 346: static void _for(Request& r, MethodParams& params) {
1.196 misha 347: InCycle temp(r);
1.164 paf 348:
1.129 paf 349: const String& var_name=params.as_string(0, "var name must be string");
350: int from=params.as_int(1, "from must be int", r);
351: int to=params.as_int(2, "to must be int", r);
1.186 misha 352: Value& body_code=params.as_junction(3, "body must be code");
1.129 paf 353: Value* delim_maybe_code=params.count()>4?¶ms[4]:0;
1.1 paf 354:
1.235 moko 355: if(to-from>=pa_loop_limit) // too long loop?
356: throw Exception(PARSER_RUNTIME, 0, "endless loop detected");
1.57 paf 357:
1.129 paf 358: VInt* vint=new VInt(0);
1.154 paf 359:
360: VMethodFrame& caller=*r.get_method_frame()->caller();
1.218 moko 361: r.put_element(caller, var_name, vint);
1.186 misha 362: if(delim_maybe_code){ // delimiter set
1.185 misha 363: bool need_delim=false;
364:
365: for(int i=from; i<=to; i++) {
366: vint->set_int(i);
367:
1.234 moko 368: Value& sv_processed=r.process(body_code);
1.249 moko 369: TempSkip4Delimiter skip(r);
1.186 misha 370:
1.185 misha 371: const String* s_processed=sv_processed.get_string();
1.186 misha 372: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 373: if(need_delim) // need delim & iteration produced string?
1.243 moko 374: r.write(r.process(*delim_maybe_code));
1.185 misha 375: else
376: need_delim=true;
377: }
1.243 moko 378: r.write(sv_processed);
1.1 paf 379:
1.249 moko 380: if(skip.check_break())
1.185 misha 381: break;
1.1 paf 382: }
1.185 misha 383: } else {
384: for(int i=from; i<=to; i++) {
385: vint->set_int(i);
386:
387: r.process_write(body_code);
1.164 paf 388:
1.249 moko 389: if(r.check_skip_break())
1.185 misha 390: break;
391: }
1.1 paf 392: }
393: }
394:
1.129 paf 395: static void _eval(Request& r, MethodParams& params) {
396: Value& expr=params.as_junction(0, "need expression");
1.1 paf 397: // evaluate expresion
1.237 moko 398: Value& value_result=r.process(expr).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()){
1.243 moko 402: r.write(value_result);
1.177 misha 403: } else {
1.243 moko 404: r.write(String(format(value_result.as_double(), fmt.cstrm())));
1.177 misha 405: }
1.91 paf 406: } else
1.243 moko 407: r.write(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) {
1.236 moko 467: Switch_data* data=new Switch_data(r, r.process(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
1.237 moko 473: r.process(cases_code);
1.147 paf 474: if(Value* selected_code=data->found? data->found: data->_default)
1.245 moko 475: r.process_write(*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++){
1.236 moko 500: Value& value=r.process(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 {
1.234 moko 523: ValueRef processed_code;
1.136 paf 524: const String* exception_should_be_handled;
525:
526: Try_catch_result(): exception_should_be_handled(0) {}
527: };
1.229 moko 528:
529: /// Auto-object used for temporary changing Request::skip.
530: class Temp_skip {
531: Request& frequest;
532: Request::Skip saved_skip;
533: public:
534: Temp_skip(Request& arequest) : frequest(arequest), saved_skip(arequest.get_skip()) {
535: arequest.set_skip(Request::SKIP_NOTHING);
536: }
537: ~Temp_skip() {
538: if(frequest.get_skip() == Request::SKIP_NOTHING)
539: frequest.set_skip(saved_skip);
540: }
541: };
1.136 paf 542: #endif
543:
544: /// used by ^try and ^cache, @returns $exception.handled[string] if any
545: template<class I>
1.234 moko 546: 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 547: Try_catch_result result;
1.179 misha 548:
1.228 moko 549: // minor bug: context not restored if only finally code is present, see #1062
1.136 paf 550: if(!catch_code) {
551: result.processed_code=body_code(r, info);
552: return result;
553: }
554:
555: // taking snapshot of try-context
556: Request_context_saver try_context(r);
557: try {
558: result.processed_code=body_code(r, info);
559: } catch(const Exception& e) {
1.230 moko 560: Request_context_saver throw_context(r); // remembering exception stack trace
561:
1.136 paf 562: Request::Exception_details details=r.get_details(e);
1.230 moko 563:
1.228 moko 564: try_context.restore(); // restoring try-context for code after try and catch-code
1.136 paf 565:
1.228 moko 566: {
567: Temp_value_element temp(r, *catch_code->get_junction()->method_frame, exception_var_name, &details.vhash);
1.229 moko 568: Temp_skip temp_skip(r);
1.228 moko 569: result.processed_code=r.process(*catch_code);
570: }
1.136 paf 571:
1.228 moko 572: // retriving $exception.handled
1.136 paf 573: Value* vhandled=details.vhash.hash().get(exception_handled_part_name);
574:
575: bool bhandled=false;
576: if(vhandled) {
577: if(vhandled->is_string()) { // not simple $exception.handled(1/0)?
1.228 moko 578: if(bhandled=could_be_handled_by_caller) { // and we can possibly handle it
1.160 paf 579: result.exception_should_be_handled=vhandled->get_string(); // considering 'recovered' and let the caller recover
580: }
581: } else
1.179 misha 582: bhandled=vhandled->as_bool();
1.136 paf 583: }
584:
1.230 moko 585: if(!bhandled){
586: throw_context.restore(); // restoring exception stack trace creared by try_context.restore()
1.136 paf 587: rethrow;
1.230 moko 588: }
1.136 paf 589: }
1.179 misha 590:
1.136 paf 591: return result;
592: }
1.28 parser 593:
1.234 moko 594: static Value& process_try_body_code(Request& r, Value* body_code) {
1.222 moko 595: return r.process(*body_code);
596: }
597:
1.63 paf 598: // cache--
599:
600: // consts
601:
1.152 paf 602: const int DATA_STRING_SERIALIZED_VERSION=0x0006;
1.63 paf 603:
604: // helper types
605:
606: #ifndef DOXYGEN
607: struct Data_string_serialized_prolog {
608: int version;
1.79 paf 609: time_t expires;
1.63 paf 610: };
611: #endif
612:
1.68 paf 613: void cache_delete(const String& file_spec) {
1.167 misha 614: file_delete(file_spec, false/*fail_on_problem*/);
1.63 paf 615: }
1.69 paf 616:
617: #ifndef DOXYGEN
1.135 paf 618: struct Cache_scope {
1.129 paf 619: public:
1.79 paf 620: time_t expires;
1.135 paf 621: const String* body_from_disk;
1.79 paf 622: };
1.69 paf 623: struct Locked_process_and_cache_put_action_info {
624: Request *r;
1.136 paf 625: Cache_scope *scope;
1.167 misha 626: Value* body_code;
627: Value* catch_code;
1.136 paf 628: const String* processed_code;
1.69 paf 629: };
630: #endif
1.136 paf 631:
632:
633:
1.234 moko 634: static Value& process_cache_body_code(Request& r, Value* body_code) {
635: return r.process(*body_code);
1.136 paf 636: }
637:
1.129 paf 638: /* @todo maybe network order worth spending some effort?
639: don't bothering myself with network byte order,
640: am not planning to be able to move resulting file across platforms
641: */
1.69 paf 642: static void locked_process_and_cache_put_action(int f, void *context) {
643: Locked_process_and_cache_put_action_info& info=
644: *static_cast<Locked_process_and_cache_put_action_info *>(context);
1.129 paf 645:
1.160 paf 646: const String* body_from_disk=info.scope->body_from_disk;
1.69 paf 647: // body->process
1.136 paf 648: Try_catch_result result=try_catch(*info.r,
649: process_cache_body_code, info.body_code,
1.160 paf 650: info.catch_code, body_from_disk!=0 /*we have something old=we can handle=recover later*/);
1.136 paf 651:
652: if(result.exception_should_be_handled) {
653: if(*result.exception_should_be_handled==CACHE_EXCEPTION_HANDLED_CACHE_NAME) {
1.160 paf 654: assert(body_from_disk);
655: info.processed_code=body_from_disk;
1.136 paf 656: } else
1.166 misha 657: throw Exception(PARSER_RUNTIME,
1.136 paf 658: result.exception_should_be_handled,
1.219 moko 659: "$" EXCEPTION_VAR_NAME "." EXCEPTION_HANDLED_PART_NAME " value must be "
660: "either boolean or string '" CACHE_EXCEPTION_HANDLED_CACHE_NAME "'");
1.136 paf 661: } else
1.234 moko 662: info.processed_code=&((Value &)result.processed_code).as_string();
1.69 paf 663:
1.79 paf 664: // expiration time not spoiled by ^cache(0) or something?
1.136 paf 665: if(info.scope->expires > time(0)) {
1.79 paf 666: // string -serialize> buffer
1.136 paf 667: String::Cm serialized=info.processed_code->serialize(
1.129 paf 668: sizeof(Data_string_serialized_prolog));
1.79 paf 669: Data_string_serialized_prolog& prolog=
1.129 paf 670: *reinterpret_cast<Data_string_serialized_prolog *>(serialized.str);
1.79 paf 671: prolog.version=DATA_STRING_SERIALIZED_VERSION;
1.136 paf 672: prolog.expires=info.scope->expires;
1.79 paf 673:
674: // buffer -write> file
1.129 paf 675: write(f, serialized.str, serialized.length);
1.79 paf 676: } else // expired!
1.136 paf 677: info.scope->expires=0; // flag it so that could be easily checked by caller
1.69 paf 678: }
1.129 paf 679: const String* locked_process_and_cache_put(Request& r,
1.128 paf 680: Value& body_code,
1.136 paf 681: Value* catch_code,
682: Cache_scope& scope,
683: const String& file_spec)
684: {
1.140 paf 685: Locked_process_and_cache_put_action_info info={&r, &scope, &body_code, catch_code, 0};
1.69 paf 686:
1.129 paf 687: const String* result=file_write_action_under_lock(
1.69 paf 688: file_spec,
1.168 misha 689: "cache_put",
690: locked_process_and_cache_put_action,
691: &info,
1.69 paf 692: false/*as_text*/,
693: false/*do_append*/,
1.173 misha 694: false/*block == don't wait till other thread release lock*/,
695: false/*dun throw exception if lock failed*/) ? info.processed_code: 0;
1.168 misha 696:
1.100 paf 697: time_t now=time(0);
1.136 paf 698: if(scope.expires<=now)
1.79 paf 699: cache_delete(file_spec);
700: return result;
1.63 paf 701: }
1.229 moko 702:
1.137 paf 703: #ifndef DOXYGEN
1.135 paf 704: struct Cache_get_result {
705: const String* body;
706: bool expired;
1.137 paf 707: };
708: #endif
1.229 moko 709:
1.137 paf 710: static Cache_get_result cache_get(Request_charsets& charsets, const String& file_spec, time_t now) {
1.140 paf 711: Cache_get_result result={0, false};
1.135 paf 712:
1.253 moko 713: File_read_result file=file_read_binary(file_spec, false /*fail_on_read_problem*/);
1.252 moko 714: if(file.success && file.length /*ignore reads which are empty due to non-unary open+lockEX conflict with lockSH*/) {
715:
716: Data_string_serialized_prolog& prolog = *reinterpret_cast<Data_string_serialized_prolog *>(file.str);
717:
1.135 paf 718: String* body=new String;
1.252 moko 719: if(file.length>=sizeof(Data_string_serialized_prolog) && prolog.version==DATA_STRING_SERIALIZED_VERSION) {
1.135 paf 720: if(body->deserialize(sizeof(Data_string_serialized_prolog), file.str, file.length)) {
721: result.body=body;
722: result.expired=prolog.expires <= now;
723: }
724: }
1.72 paf 725: }
1.63 paf 726:
1.135 paf 727: return result;
1.63 paf 728: }
1.252 moko 729:
730: static time_t as_expires(Request& r, MethodParams& params, int index, time_t now) {
1.79 paf 731: time_t result;
1.197 misha 732: if(Value* vdate=params[index].as(VDATE_TYPE))
1.220 moko 733: result=(time_t)(static_cast<VDate*>(vdate)->get_time());
1.79 paf 734: else
1.129 paf 735: result=now+(time_t)params.as_double(index, "lifespan must be date or number", r);
1.79 paf 736:
737: return result;
738: }
1.229 moko 739:
1.129 paf 740: static const String& as_file_spec(Request& r, MethodParams& params, int index) {
1.258 ! moko 741: return r.full_disk_path(params.as_string(index, "filespec must be string"));
1.79 paf 742: }
1.229 moko 743:
1.129 paf 744: static void _cache(Request& r, MethodParams& params) {
1.173 misha 745: if(params.count()==0) {
746: // ^cache[] -- return current expiration time
1.158 paf 747: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
748: if(!scope)
1.221 moko 749: throw Exception(PARSER_RUNTIME, 0, "expire-time get without cache");
1.243 moko 750: r.write(*new VDate((pa_time_t)scope->expires));
1.158 paf 751: return;
752: }
753:
1.79 paf 754: time_t now=time(0);
755:
1.129 paf 756: if(params.count()==1) {
1.173 misha 757: // ^cache[filename] ^cache(seconds) ^cache[expires date]
1.129 paf 758: if(params[0].is_string()) { // filename?
1.79 paf 759: cache_delete(as_file_spec(r, params, 0));
760: return;
761: }
762:
763: // secods|expires date
1.135 paf 764: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
765: if(!scope)
1.166 misha 766: throw Exception(PARSER_RUNTIME,
1.129 paf 767: 0,
1.79 paf 768: "expire-time reducing instruction without cache");
769:
1.129 paf 770: time_t expires=as_expires(r, params, 0, now);
1.135 paf 771: if(expires < scope->expires)
772: scope->expires=expires;
1.79 paf 773:
774: return;
1.149 paf 775: } else if(params.count()<3)
1.166 misha 776: throw Exception(PARSER_RUNTIME,
1.149 paf 777: 0,
778: "invalid number of parameters");
1.63 paf 779:
780: // file_spec, expires, body code
1.172 misha 781: const String& file_spec=as_file_spec(r, params, 0);
1.65 paf 782:
1.141 paf 783: Cache_scope scope={as_expires(r, params, 1, now), 0};
1.135 paf 784:
1.215 moko 785: Temp_hash_value<HashString<void*>, void*> cache_scope_setter(&r.classes_conf, cache_data_name, &scope);
1.136 paf 786: Value& body_code=params.as_junction(2, "body_code must be code");
787: Value* catch_code=0;
788: if(params.count()>3)
789: catch_code=¶ms.as_junction(3, "catch_code must be code");
1.63 paf 790:
1.168 misha 791: if(scope.expires>now) {
792: Cache_get_result cached=cache_get(r.charsets, file_spec, now);
1.69 paf 793:
1.168 misha 794: if(cached.body) { // have cached copy
1.174 misha 795: if(cached.expired) {
796: scope.body_from_disk=cached.body; // storing for user to retrive it with ^cache[]
797: } else {
798: // and it's not expired yet write it out
1.243 moko 799: r.write(*cached.body);
1.168 misha 800: // happy with it
801: return;
802: }
803: }
804:
805: // no cached info or it's already expired
1.173 misha 806:
807: // trying to process it under lock and store result in file
1.174 misha 808: const String* processed_body=locked_process_and_cache_put(r, body_code, catch_code, scope, file_spec);
1.173 misha 809: if(processed_body){
1.174 misha 810: // write it out
1.243 moko 811: r.write(*processed_body);
1.174 misha 812: // happy with it
813: return;
1.173 misha 814: } else {
815: // we fail while get exclusive lock. nvm, we just execute body_code a bit later
1.174 misha 816: }
1.69 paf 817: } else {
1.79 paf 818: // instructed not to cache; forget cached copy
1.68 paf 819: cache_delete(file_spec);
1.69 paf 820: }
1.168 misha 821:
1.222 moko 822: // process without caching
823: if(catch_code){
824: Try_catch_result result=try_catch(r, process_try_body_code, &body_code, catch_code);
1.243 moko 825: r.write(result.processed_code);
1.222 moko 826: } else {
1.243 moko 827: r.write(r.process_to_string(body_code));
1.222 moko 828: }
1.63 paf 829: }
830:
1.129 paf 831: static void _try_operator(Request& r, MethodParams& params) {
832: Value& body_code=params.as_junction(0, "body_code must be code");
833: Value& catch_code=params.as_junction(1, "catch_code must be code");
1.179 misha 834: Value* finally_code=(params.count()==3) ? ¶ms.as_junction(2, "finally_code must be code") : 0;
835:
836: Try_catch_result result;
1.229 moko 837:
1.179 misha 838: try{
1.229 moko 839: // process try and catch code
1.222 moko 840: result=try_catch(r, process_try_body_code, &body_code, &catch_code);
1.179 misha 841: } catch(...){
1.229 moko 842: // process finally code but ignore the result
843: if(finally_code){
844: Temp_skip temp(r);
1.248 moko 845: /* Value &finally_result= */ r.process(*finally_code);
1.229 moko 846: }
1.179 misha 847: rethrow;
848: }
1.74 paf 849:
1.229 moko 850: // process finally code
851: if(finally_code){
852: Temp_skip temp(r);
1.234 moko 853: Value& finally_result=r.process(*finally_code);
1.229 moko 854:
1.234 moko 855: // no exception in try/catch or finally, writing processed body_code or catch_code
1.243 moko 856: r.write(result.processed_code);
1.123 paf 857:
1.234 moko 858: // write out processed finally code
1.243 moko 859: r.write(finally_result);
1.234 moko 860: } else {
861: // no exception in try/catch, writing processed body_code or catch_code
1.243 moko 862: r.write(result.processed_code);
1.234 moko 863: }
1.179 misha 864:
1.74 paf 865: }
866:
1.138 paf 867: static void _throw_operator(Request&, MethodParams& params) {
1.178 misha 868: if(params.count()==1 && !params[0].is_string()) {
1.129 paf 869: if(HashStringValue *hash=params[0].get_hash()) {
870: const char* type=0;
871: if(Value* value=hash->get(exception_type_part_name))
1.78 paf 872: type=value->as_string().cstr();
1.129 paf 873: const String* source=0;
874: if(Value* value=hash->get(exception_source_part_name))
1.74 paf 875: source=&value->as_string();
1.138 paf 876: const char* comment=0;
1.129 paf 877: if(Value* value=hash->get(exception_comment_part_name))
1.74 paf 878: comment=value->as_string().cstr();
879:
1.78 paf 880: throw Exception(type,
1.129 paf 881: source?source:0,
882: "%s", comment?comment:"");
1.74 paf 883: } else
1.166 misha 884: throw Exception(PARSER_RUNTIME,
1.129 paf 885: 0,
1.178 misha 886: "one-param version has hash or string param");
1.74 paf 887: } else {
1.129 paf 888: const char* type=params.as_string(0, "type must be string").cstr();
1.178 misha 889: const String* source=params.count()>1? ¶ms.as_string(1, "source must be string"):0;
890: const char* comment=params.count()>2? params.as_string(2, "comment must be string").cstr():0;
891: throw Exception(type, source, "%s", comment?comment:"");
1.74 paf 892: }
1.132 paf 893: }
1.129 paf 894:
1.150 paf 895: static void _sleep_operator(Request& r, MethodParams& params) {
896: double seconds=params.as_double(0, "seconds must be double", r);
1.206 moko 897: if(seconds>0)
898: pa_sleep((int)trunc(seconds), (int)trunc((seconds-trunc(seconds))*1000000));
1.150 paf 899: }
900:
1.254 moko 901: #if defined(WIN32) && defined(_DEBUG) && !defined(_WIN64)
1.129 paf 902: # define PA_BPT
1.138 paf 903: static void _bpt(Request&, MethodParams&) {
1.129 paf 904: _asm int 3;
905: }
906: #endif
907:
1.10 paf 908: // constructor
909:
1.226 moko 910: VClassMAIN::VClassMAIN(): VClass(MAIN_CLASS_NAME) {
1.129 paf 911:
912: #ifdef PA_BPT
913: // ^bpt[]
914: add_native_method("bpt", Method::CT_ANY, _bpt, 0, 0);
915: #endif
1.121 paf 916:
1.1 paf 917: // ^if(condition){code-when-true}
918: // ^if(condition){code-when-true}{code-when-false}
1.200 moko 919: // ^if(condition){code-when-true} (another condition){code-when-true} ... {code-when-false}
920: add_native_method("if", Method::CT_ANY, _if, 2, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 921:
1.194 misha 922: // ^untaint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
923: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 924:
1.194 misha 925: // ^taint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
926: add_native_method("taint", Method::CT_ANY, _taint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 927:
1.205 moko 928: // ^apply-taint[untaint lang][string]
929: add_native_method("apply-taint", Method::CT_ANY, _apply_taint, 1, 2, Method::CO_WITHOUT_FRAME);
930:
1.216 moko 931: // ^process{code}
932: // ^process[context]{code}[options hash]
1.146 paf 933: add_native_method("process", Method::CT_ANY, _process, 1, 3);
1.1 paf 934:
935: // ^rem{code}
1.185 misha 936: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 937:
938: // ^while(condition){code}
1.185 misha 939: add_native_method("while", Method::CT_ANY, _while, 2, 3, Method::CO_WITHOUT_FRAME);
1.1 paf 940:
1.216 moko 941: // ^use[file[;options hash]]
942: add_native_method("use", Method::CT_ANY, _use, 1, 2);
1.1 paf 943:
1.164 paf 944: // ^break[]
1.227 moko 945: // ^break(condition)
946: add_native_method("break", Method::CT_ANY, _break, 0, 1, Method::CO_WITHOUT_FRAME);
1.185 misha 947:
1.164 paf 948: // ^continue[]
1.227 moko 949: // ^continue(condition)
950: add_native_method("continue", Method::CT_ANY, _continue, 0, 1, Method::CO_WITHOUT_FRAME);
1.185 misha 951:
1.249 moko 952: // ^return[]
953: // ^return[result]
1.250 moko 954: add_native_method("return", Method::CT_ANY, _return, 0, 1);
1.249 moko 955:
1.54 paf 956: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.239 moko 957: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1);
1.1 paf 958:
959: // ^eval(expr)
960: // ^eval(expr)[format]
1.185 misha 961: add_native_method("eval", Method::CT_ANY, _eval, 1, 2, Method::CO_WITHOUT_FRAME);
1.52 parser 962:
1.1 paf 963: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 964: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
965:
1.63 paf 966:
1.136 paf 967: // ^cache[file_spec](time){code}[{catch code}] time=0 no cache
1.65 paf 968: // ^cache[file_spec] delete cache
1.161 paf 969: // ^cache[] get current expiration time
970: add_native_method("cache", Method::CT_ANY, _cache, 0, 4);
1.63 paf 971:
1.28 parser 972: // switch
973:
974: // ^switch[value]{cases}
1.185 misha 975: add_native_method("switch", Method::CT_ANY, _switch, 2, 2, Method::CO_WITHOUT_FRAME);
1.28 parser 976:
977: // ^case[value]{code}
1.185 misha 978: add_native_method("case", Method::CT_ANY, _case, 2, 10000, Method::CO_WITHOUT_FRAME);
1.74 paf 979:
980: // try-catch
981:
982: // ^try{code}{catch code}
1.185 misha 983: add_native_method("try", Method::CT_ANY, _try_operator, 2, 3, Method::CO_WITHOUT_FRAME);
1.74 paf 984: // ^throw[$exception hash]
985: // ^throw[type;source;comment]
986: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
987:
1.150 paf 988: add_native_method("sleep", Method::CT_ANY, _sleep_operator, 1, 1);
1.10 paf 989: }
1.11 paf 990:
991: // constructor & configurator
1.1 paf 992:
1.129 paf 993: VStateless_class& VClassMAIN_create() {
994: return *new VClassMAIN;
1.1 paf 995: }
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