Annotation of parser3/src/classes/op.C, revision 1.246
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:
1.246 ! moko 21: volatile const char * IDENT_OP_C="$Id: op.C,v 1.245 2016/11/10 22:52:49 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);
1.185 misha 251: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
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:
1.185 misha 262: if(lskip==Request::SKIP_BREAK)
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: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
275:
276: if(lskip==Request::SKIP_BREAK)
277: break;
278: }
1.1 paf 279: }
280: }
281:
1.129 paf 282: static void _use(Request& r, MethodParams& params) {
1.171 misha 283: Value& vfile=params.as_no_junction(0, FILE_NAME_MUST_NOT_BE_CODE);
1.199 misha 284:
1.216 moko 285: bool allow_class_replace=false;
1.246 ! moko 286: const String* use_origin=0;
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:
296: if(key == "replace") {
297: valid_options++;
1.236 moko 298: allow_class_replace=r.process(*value).as_bool();
1.216 moko 299: }
300:
1.246 ! moko 301: if(key == "origin") {
! 302: valid_options++;
! 303: use_origin=&value->as_string();
! 304: }
! 305:
! 306: if(valid_options!=options->count())
! 307: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
1.216 moko 308: }
309: }
310:
1.246 ! moko 311: if(!use_origin)
! 312: if(VMethodFrame* caller=r.get_method_frame()->caller())
! 313: use_origin=r.get_method_filename(&caller->method);
! 314:
1.216 moko 315: Temp_class_replace class_replace(r, allow_class_replace);
316:
1.246 ! moko 317: r.use_file(r.main_class, vfile.as_string(), use_origin);
1.1 paf 318: }
319:
1.164 paf 320: static void set_skip(Request& r, Request::Skip askip) {
1.196 misha 321: if(!r.get_in_cycle())
1.227 moko 322: throw Exception(askip==Request::SKIP_BREAK ? "parser.break" : "parser.continue", 0, "without cycle");
1.164 paf 323: r.set_skip(askip);
324: }
325:
1.227 moko 326: static void _break(Request& r, MethodParams& params) {
327: if(!params.count() || params.as_bool(0, "condition must be expression", r)) set_skip(r, Request::SKIP_BREAK);
1.164 paf 328: }
329:
1.227 moko 330: static void _continue(Request& r, MethodParams& params) {
331: if(!params.count() || params.as_bool(0, "condition must be expression", r)) set_skip(r, Request::SKIP_CONTINUE);
1.164 paf 332: }
333:
1.129 paf 334: static void _for(Request& r, MethodParams& params) {
1.196 misha 335: InCycle temp(r);
1.164 paf 336:
1.129 paf 337: const String& var_name=params.as_string(0, "var name must be string");
338: int from=params.as_int(1, "from must be int", r);
339: int to=params.as_int(2, "to must be int", r);
1.186 misha 340: Value& body_code=params.as_junction(3, "body must be code");
1.129 paf 341: Value* delim_maybe_code=params.count()>4?¶ms[4]:0;
1.1 paf 342:
1.235 moko 343: if(to-from>=pa_loop_limit) // too long loop?
344: throw Exception(PARSER_RUNTIME, 0, "endless loop detected");
1.57 paf 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:
1.234 moko 356: Value& sv_processed=r.process(body_code);
1.185 misha 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?
1.243 moko 362: r.write(r.process(*delim_maybe_code));
1.185 misha 363: else
364: need_delim=true;
365: }
1.243 moko 366: r.write(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
1.237 moko 387: Value& value_result=r.process(expr).as_expr_result();
1.129 paf 388: if(params.count()>1) {
1.177 misha 389: const String& fmt=params.as_string(1, "fmt must be string").trim();
390: if(fmt.is_empty()){
1.243 moko 391: r.write(value_result);
1.177 misha 392: } else {
1.243 moko 393: r.write(String(format(value_result.as_double(), fmt.cstrm())));
1.177 misha 394: }
1.91 paf 395: } else
1.243 moko 396: r.write(value_result);
1.1 paf 397: }
398:
1.129 paf 399: static void _connect(Request& r, MethodParams& params) {
400: Value& url=params.as_no_junction(0, "url must not be code");
401: Value& body_code=params.as_junction(1, "body must be code");
1.1 paf 402:
1.129 paf 403: Table* protocol2driver_and_client=0;
1.197 misha 404: if(Value* sql=r.main_class.get_element(String(MAIN_SQL_NAME))) {
405: if(Value* element=sql->get_element(String(MAIN_SQL_DRIVERS_NAME))) {
1.113 paf 406: protocol2driver_and_client=element->get_table();
407: }
408: }
1.11 paf 409:
1.1 paf 410: // connect
1.142 paf 411: SQL_Connection* connection=SQL_driver_manager->get_connection(url.as_string(),
1.144 paf 412: protocol2driver_and_client,
1.180 misha 413: r.charsets.source().NAME().cstr(),
414: r.request_info.document_root);
1.1 paf 415:
1.214 moko 416: Temp_connection temp_connection(r, connection);
1.63 paf 417:
1.1 paf 418: // execute body
1.53 parser 419: try {
1.189 misha 420: r.process_write(body_code);
1.129 paf 421: connection->commit();
422: connection->close();
1.75 paf 423: } catch(...) { // process problem
1.129 paf 424: connection->rollback();
425: connection->close();
426: rethrow;
1.1 paf 427: }
428: }
429:
1.41 parser 430: #ifndef DOXYGEN
1.129 paf 431: class Switch_data: public PA_Object {
432: public:
433: Request& r;
1.181 misha 434: const String* searching_string;
435: double searching_double;
1.207 misha 436: bool searching_bool;
1.129 paf 437: Value* found;
438: Value* _default;
439: public:
440: Switch_data(Request& ar, Value& asearching):
1.181 misha 441: r(ar)
442: {
443: if(asearching.is_string() || asearching.is_void()){
444: searching_string=&asearching.as_string();
445: searching_double=0;
1.207 misha 446: searching_bool=false;
1.181 misha 447: } else {
448: searching_string=0;
449: searching_double=asearching.as_double();
1.207 misha 450: searching_bool=asearching.is_bool();
1.181 misha 451: }
452: }
1.28 parser 453: };
1.41 parser 454: #endif
1.129 paf 455: static void _switch(Request& r, MethodParams& params) {
1.236 moko 456: Switch_data* data=new Switch_data(r, r.process(params[0]));
1.215 moko 457: Temp_hash_value<HashString<void*>, void*> switch_data_setter(&r.classes_conf, switch_data_name, data);
1.28 parser 458:
1.129 paf 459: Value& cases_code=params.as_junction(1, "switch cases must be code");
1.82 paf 460: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
461: // because of stacked WWrapper used there as wcontext
1.237 moko 462: r.process(cases_code);
1.147 paf 463: if(Value* selected_code=data->found? data->found: data->_default)
1.245 moko 464: r.process_write(*selected_code);
1.28 parser 465: }
466:
1.129 paf 467: static void _case(Request& r, MethodParams& params) {
468: Switch_data* data=static_cast<Switch_data*>(r.classes_conf.get(switch_data_name));
1.38 parser 469: if(!data)
1.166 misha 470: throw Exception(PARSER_RUNTIME,
1.129 paf 471: 0,
1.38 parser 472: "without switch");
1.28 parser 473:
1.181 misha 474: if(data->found) // matches already was found
475: return;
476:
1.129 paf 477: int count=params.count();
1.184 misha 478: Value* code=¶ms.as_expression(--count, "case result must be code");
479:
480: #ifdef USE_DESTRUCTORS
481: Junction *j=code->get_junction();
482: if (j){
483: code=new VJunction(j->self,j->method,j->method_frame,j->rcontext,j->wcontext,j->code);
484: if (j->wcontext) j->wcontext->attach_junction((VJunction *)code);
485: }
486: #endif
1.83 paf 487:
1.181 misha 488: for(int i=0; i<count; i++){
1.236 moko 489: Value& value=r.process(params[i]);
1.28 parser 490:
1.181 misha 491: if(value.is_string() && value.as_string() == CASE_DEFAULT_VALUE){
1.184 misha 492: data->_default=code;
1.181 misha 493: continue;
1.28 parser 494: }
495:
496: bool matches;
1.181 misha 497: if(data->searching_string)
498: matches=(*data->searching_string) == value.as_string();
1.207 misha 499: else if(data->searching_bool || value.is_bool())
500: matches=(data->searching_double != 0) == value.as_bool();
1.28 parser 501: else
1.181 misha 502: matches=data->searching_double == value.as_double();
1.82 paf 503:
1.181 misha 504: if(matches){
1.184 misha 505: data->found=code;
1.28 parser 506: break;
507: }
508: }
509: }
1.136 paf 510: #ifndef DOXYGEN
511: struct Try_catch_result {
1.234 moko 512: ValueRef processed_code;
1.136 paf 513: const String* exception_should_be_handled;
514:
515: Try_catch_result(): exception_should_be_handled(0) {}
516: };
1.229 moko 517:
518: /// Auto-object used for temporary changing Request::skip.
519: class Temp_skip {
520: Request& frequest;
521: Request::Skip saved_skip;
522: public:
523: Temp_skip(Request& arequest) : frequest(arequest), saved_skip(arequest.get_skip()) {
524: arequest.set_skip(Request::SKIP_NOTHING);
525: }
526: ~Temp_skip() {
527: if(frequest.get_skip() == Request::SKIP_NOTHING)
528: frequest.set_skip(saved_skip);
529: }
530: };
1.136 paf 531: #endif
532:
533: /// used by ^try and ^cache, @returns $exception.handled[string] if any
534: template<class I>
1.234 moko 535: 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 536: Try_catch_result result;
1.179 misha 537:
1.228 moko 538: // minor bug: context not restored if only finally code is present, see #1062
1.136 paf 539: if(!catch_code) {
540: result.processed_code=body_code(r, info);
541: return result;
542: }
543:
544: // taking snapshot of try-context
545: Request_context_saver try_context(r);
546: try {
547: result.processed_code=body_code(r, info);
548: } catch(const Exception& e) {
1.230 moko 549: Request_context_saver throw_context(r); // remembering exception stack trace
550:
1.136 paf 551: Request::Exception_details details=r.get_details(e);
1.230 moko 552:
1.228 moko 553: try_context.restore(); // restoring try-context for code after try and catch-code
1.136 paf 554:
1.228 moko 555: {
556: Temp_value_element temp(r, *catch_code->get_junction()->method_frame, exception_var_name, &details.vhash);
1.229 moko 557: Temp_skip temp_skip(r);
1.228 moko 558: result.processed_code=r.process(*catch_code);
559: }
1.136 paf 560:
1.228 moko 561: // retriving $exception.handled
1.136 paf 562: Value* vhandled=details.vhash.hash().get(exception_handled_part_name);
563:
564: bool bhandled=false;
565: if(vhandled) {
566: if(vhandled->is_string()) { // not simple $exception.handled(1/0)?
1.228 moko 567: if(bhandled=could_be_handled_by_caller) { // and we can possibly handle it
1.160 paf 568: result.exception_should_be_handled=vhandled->get_string(); // considering 'recovered' and let the caller recover
569: }
570: } else
1.179 misha 571: bhandled=vhandled->as_bool();
1.136 paf 572: }
573:
1.230 moko 574: if(!bhandled){
575: throw_context.restore(); // restoring exception stack trace creared by try_context.restore()
1.136 paf 576: rethrow;
1.230 moko 577: }
1.136 paf 578: }
1.179 misha 579:
1.136 paf 580: return result;
581: }
1.28 parser 582:
1.234 moko 583: static Value& process_try_body_code(Request& r, Value* body_code) {
1.222 moko 584: return r.process(*body_code);
585: }
586:
1.63 paf 587: // cache--
588:
589: // consts
590:
1.152 paf 591: const int DATA_STRING_SERIALIZED_VERSION=0x0006;
1.63 paf 592:
593: // helper types
594:
595: #ifndef DOXYGEN
596: struct Data_string_serialized_prolog {
597: int version;
1.79 paf 598: time_t expires;
1.63 paf 599: };
600: #endif
601:
1.68 paf 602: void cache_delete(const String& file_spec) {
1.167 misha 603: file_delete(file_spec, false/*fail_on_problem*/);
1.63 paf 604: }
1.69 paf 605:
606: #ifndef DOXYGEN
1.135 paf 607: struct Cache_scope {
1.129 paf 608: public:
1.79 paf 609: time_t expires;
1.135 paf 610: const String* body_from_disk;
1.79 paf 611: };
1.69 paf 612: struct Locked_process_and_cache_put_action_info {
613: Request *r;
1.136 paf 614: Cache_scope *scope;
1.167 misha 615: Value* body_code;
616: Value* catch_code;
1.136 paf 617: const String* processed_code;
1.69 paf 618: };
619: #endif
1.136 paf 620:
621:
622:
1.234 moko 623: static Value& process_cache_body_code(Request& r, Value* body_code) {
624: return r.process(*body_code);
1.136 paf 625: }
626:
1.129 paf 627: /* @todo maybe network order worth spending some effort?
628: don't bothering myself with network byte order,
629: am not planning to be able to move resulting file across platforms
630: */
1.69 paf 631: static void locked_process_and_cache_put_action(int f, void *context) {
632: Locked_process_and_cache_put_action_info& info=
633: *static_cast<Locked_process_and_cache_put_action_info *>(context);
1.129 paf 634:
1.160 paf 635: const String* body_from_disk=info.scope->body_from_disk;
1.69 paf 636: // body->process
1.136 paf 637: Try_catch_result result=try_catch(*info.r,
638: process_cache_body_code, info.body_code,
1.160 paf 639: info.catch_code, body_from_disk!=0 /*we have something old=we can handle=recover later*/);
1.136 paf 640:
641: if(result.exception_should_be_handled) {
642: if(*result.exception_should_be_handled==CACHE_EXCEPTION_HANDLED_CACHE_NAME) {
1.160 paf 643: assert(body_from_disk);
644: info.processed_code=body_from_disk;
1.136 paf 645: } else
1.166 misha 646: throw Exception(PARSER_RUNTIME,
1.136 paf 647: result.exception_should_be_handled,
1.219 moko 648: "$" EXCEPTION_VAR_NAME "." EXCEPTION_HANDLED_PART_NAME " value must be "
649: "either boolean or string '" CACHE_EXCEPTION_HANDLED_CACHE_NAME "'");
1.136 paf 650: } else
1.234 moko 651: info.processed_code=&((Value &)result.processed_code).as_string();
1.69 paf 652:
1.79 paf 653: // expiration time not spoiled by ^cache(0) or something?
1.136 paf 654: if(info.scope->expires > time(0)) {
1.79 paf 655: // string -serialize> buffer
1.136 paf 656: String::Cm serialized=info.processed_code->serialize(
1.129 paf 657: sizeof(Data_string_serialized_prolog));
1.79 paf 658: Data_string_serialized_prolog& prolog=
1.129 paf 659: *reinterpret_cast<Data_string_serialized_prolog *>(serialized.str);
1.79 paf 660: prolog.version=DATA_STRING_SERIALIZED_VERSION;
1.136 paf 661: prolog.expires=info.scope->expires;
1.79 paf 662:
663: // buffer -write> file
1.129 paf 664: write(f, serialized.str, serialized.length);
1.79 paf 665: } else // expired!
1.136 paf 666: info.scope->expires=0; // flag it so that could be easily checked by caller
1.69 paf 667: }
1.129 paf 668: const String* locked_process_and_cache_put(Request& r,
1.128 paf 669: Value& body_code,
1.136 paf 670: Value* catch_code,
671: Cache_scope& scope,
672: const String& file_spec)
673: {
1.140 paf 674: Locked_process_and_cache_put_action_info info={&r, &scope, &body_code, catch_code, 0};
1.69 paf 675:
1.129 paf 676: const String* result=file_write_action_under_lock(
1.69 paf 677: file_spec,
1.168 misha 678: "cache_put",
679: locked_process_and_cache_put_action,
680: &info,
1.69 paf 681: false/*as_text*/,
682: false/*do_append*/,
1.173 misha 683: false/*block == don't wait till other thread release lock*/,
684: false/*dun throw exception if lock failed*/) ? info.processed_code: 0;
1.168 misha 685:
1.100 paf 686: time_t now=time(0);
1.136 paf 687: if(scope.expires<=now)
1.79 paf 688: cache_delete(file_spec);
689: return result;
1.63 paf 690: }
1.229 moko 691:
1.137 paf 692: #ifndef DOXYGEN
1.135 paf 693: struct Cache_get_result {
694: const String* body;
695: bool expired;
1.137 paf 696: };
697: #endif
1.229 moko 698:
1.137 paf 699: static Cache_get_result cache_get(Request_charsets& charsets, const String& file_spec, time_t now) {
1.140 paf 700: Cache_get_result result={0, false};
1.135 paf 701:
1.129 paf 702: File_read_result file=file_read(charsets, file_spec,
1.63 paf 703: false/*as_text*/,
1.129 paf 704: 0, //no params
705: false/*fail_on_read_problem*/);
706: if(file.success && file.length/* ignore reads which are empty due to
1.72 paf 707: non-unary open+lockEX conflict with lockSH */) {
1.129 paf 708:
1.72 paf 709: Data_string_serialized_prolog& prolog=
1.129 paf 710: *reinterpret_cast<Data_string_serialized_prolog *>(file.str);
1.63 paf 711:
1.135 paf 712: String* body=new String;
1.72 paf 713: if(
1.129 paf 714: file.length>=sizeof(Data_string_serialized_prolog)
1.135 paf 715: && prolog.version==DATA_STRING_SERIALIZED_VERSION) {
716: if(body->deserialize(sizeof(Data_string_serialized_prolog), file.str, file.length)) {
717: result.body=body;
718: result.expired=prolog.expires <= now;
719: }
720: }
1.72 paf 721: }
1.63 paf 722:
1.135 paf 723: return result;
1.63 paf 724: }
1.129 paf 725: static time_t as_expires(Request& r, MethodParams& params,
1.79 paf 726: int index, time_t now) {
727: time_t result;
1.197 misha 728: if(Value* vdate=params[index].as(VDATE_TYPE))
1.220 moko 729: result=(time_t)(static_cast<VDate*>(vdate)->get_time());
1.79 paf 730: else
1.129 paf 731: result=now+(time_t)params.as_double(index, "lifespan must be date or number", r);
1.79 paf 732:
733: return result;
734: }
1.229 moko 735:
1.129 paf 736: static const String& as_file_spec(Request& r, MethodParams& params, int index) {
737: return r.absolute(params.as_string(index, "filespec must be string"));
1.79 paf 738: }
1.229 moko 739:
1.129 paf 740: static void _cache(Request& r, MethodParams& params) {
1.173 misha 741: if(params.count()==0) {
742: // ^cache[] -- return current expiration time
1.158 paf 743: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
744: if(!scope)
1.221 moko 745: throw Exception(PARSER_RUNTIME, 0, "expire-time get without cache");
1.243 moko 746: r.write(*new VDate((pa_time_t)scope->expires));
1.158 paf 747: return;
748: }
749:
1.79 paf 750: time_t now=time(0);
751:
1.129 paf 752: if(params.count()==1) {
1.173 misha 753: // ^cache[filename] ^cache(seconds) ^cache[expires date]
1.129 paf 754: if(params[0].is_string()) { // filename?
1.79 paf 755: cache_delete(as_file_spec(r, params, 0));
756: return;
757: }
758:
759: // secods|expires date
1.135 paf 760: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
761: if(!scope)
1.166 misha 762: throw Exception(PARSER_RUNTIME,
1.129 paf 763: 0,
1.79 paf 764: "expire-time reducing instruction without cache");
765:
1.129 paf 766: time_t expires=as_expires(r, params, 0, now);
1.135 paf 767: if(expires < scope->expires)
768: scope->expires=expires;
1.79 paf 769:
770: return;
1.149 paf 771: } else if(params.count()<3)
1.166 misha 772: throw Exception(PARSER_RUNTIME,
1.149 paf 773: 0,
774: "invalid number of parameters");
1.63 paf 775:
776: // file_spec, expires, body code
1.172 misha 777: const String& file_spec=as_file_spec(r, params, 0);
1.65 paf 778:
1.141 paf 779: Cache_scope scope={as_expires(r, params, 1, now), 0};
1.135 paf 780:
1.215 moko 781: Temp_hash_value<HashString<void*>, void*> cache_scope_setter(&r.classes_conf, cache_data_name, &scope);
1.136 paf 782: Value& body_code=params.as_junction(2, "body_code must be code");
783: Value* catch_code=0;
784: if(params.count()>3)
785: catch_code=¶ms.as_junction(3, "catch_code must be code");
1.63 paf 786:
1.168 misha 787: if(scope.expires>now) {
788: Cache_get_result cached=cache_get(r.charsets, file_spec, now);
1.69 paf 789:
1.168 misha 790: if(cached.body) { // have cached copy
1.174 misha 791: if(cached.expired) {
792: scope.body_from_disk=cached.body; // storing for user to retrive it with ^cache[]
793: } else {
794: // and it's not expired yet write it out
1.243 moko 795: r.write(*cached.body);
1.168 misha 796: // happy with it
797: return;
798: }
799: }
800:
801: // no cached info or it's already expired
1.173 misha 802:
803: // trying to process it under lock and store result in file
1.174 misha 804: const String* processed_body=locked_process_and_cache_put(r, body_code, catch_code, scope, file_spec);
1.173 misha 805: if(processed_body){
1.174 misha 806: // write it out
1.243 moko 807: r.write(*processed_body);
1.174 misha 808: // happy with it
809: return;
1.173 misha 810: } else {
811: // we fail while get exclusive lock. nvm, we just execute body_code a bit later
1.174 misha 812: }
1.69 paf 813: } else {
1.79 paf 814: // instructed not to cache; forget cached copy
1.68 paf 815: cache_delete(file_spec);
1.69 paf 816: }
1.168 misha 817:
1.222 moko 818: // process without caching
819: if(catch_code){
820: Try_catch_result result=try_catch(r, process_try_body_code, &body_code, catch_code);
1.243 moko 821: r.write(result.processed_code);
1.222 moko 822: } else {
1.243 moko 823: r.write(r.process_to_string(body_code));
1.222 moko 824: }
1.63 paf 825: }
826:
1.129 paf 827: static void _try_operator(Request& r, MethodParams& params) {
828: Value& body_code=params.as_junction(0, "body_code must be code");
829: Value& catch_code=params.as_junction(1, "catch_code must be code");
1.179 misha 830: Value* finally_code=(params.count()==3) ? ¶ms.as_junction(2, "finally_code must be code") : 0;
831:
832: Try_catch_result result;
1.229 moko 833:
1.179 misha 834: try{
1.229 moko 835: // process try and catch code
1.222 moko 836: result=try_catch(r, process_try_body_code, &body_code, &catch_code);
1.179 misha 837: } catch(...){
1.229 moko 838: // process finally code but ignore the result
839: if(finally_code){
840: Temp_skip temp(r);
1.234 moko 841: Value &finally_result=r.process(*finally_code);
1.229 moko 842: }
1.179 misha 843: rethrow;
844: }
1.74 paf 845:
1.229 moko 846: // process finally code
847: if(finally_code){
848: Temp_skip temp(r);
1.234 moko 849: Value& finally_result=r.process(*finally_code);
1.229 moko 850:
1.234 moko 851: // no exception in try/catch or finally, writing processed body_code or catch_code
1.243 moko 852: r.write(result.processed_code);
1.123 paf 853:
1.234 moko 854: // write out processed finally code
1.243 moko 855: r.write(finally_result);
1.234 moko 856: } else {
857: // no exception in try/catch, writing processed body_code or catch_code
1.243 moko 858: r.write(result.processed_code);
1.234 moko 859: }
1.179 misha 860:
1.74 paf 861: }
862:
1.138 paf 863: static void _throw_operator(Request&, MethodParams& params) {
1.178 misha 864: if(params.count()==1 && !params[0].is_string()) {
1.129 paf 865: if(HashStringValue *hash=params[0].get_hash()) {
866: const char* type=0;
867: if(Value* value=hash->get(exception_type_part_name))
1.78 paf 868: type=value->as_string().cstr();
1.129 paf 869: const String* source=0;
870: if(Value* value=hash->get(exception_source_part_name))
1.74 paf 871: source=&value->as_string();
1.138 paf 872: const char* comment=0;
1.129 paf 873: if(Value* value=hash->get(exception_comment_part_name))
1.74 paf 874: comment=value->as_string().cstr();
875:
1.78 paf 876: throw Exception(type,
1.129 paf 877: source?source:0,
878: "%s", comment?comment:"");
1.74 paf 879: } else
1.166 misha 880: throw Exception(PARSER_RUNTIME,
1.129 paf 881: 0,
1.178 misha 882: "one-param version has hash or string param");
1.74 paf 883: } else {
1.129 paf 884: const char* type=params.as_string(0, "type must be string").cstr();
1.178 misha 885: const String* source=params.count()>1? ¶ms.as_string(1, "source must be string"):0;
886: const char* comment=params.count()>2? params.as_string(2, "comment must be string").cstr():0;
887: throw Exception(type, source, "%s", comment?comment:"");
1.74 paf 888: }
1.132 paf 889: }
1.129 paf 890:
1.150 paf 891: static void _sleep_operator(Request& r, MethodParams& params) {
892: double seconds=params.as_double(0, "seconds must be double", r);
1.206 moko 893: if(seconds>0)
894: pa_sleep((int)trunc(seconds), (int)trunc((seconds-trunc(seconds))*1000000));
1.150 paf 895: }
896:
1.129 paf 897: #if defined(WIN32) && defined(_DEBUG)
898: # define PA_BPT
1.138 paf 899: static void _bpt(Request&, MethodParams&) {
1.129 paf 900: _asm int 3;
901: }
902: #endif
903:
1.10 paf 904: // constructor
905:
1.226 moko 906: VClassMAIN::VClassMAIN(): VClass(MAIN_CLASS_NAME) {
1.129 paf 907:
908: #ifdef PA_BPT
909: // ^bpt[]
910: add_native_method("bpt", Method::CT_ANY, _bpt, 0, 0);
911: #endif
1.121 paf 912:
1.1 paf 913: // ^if(condition){code-when-true}
914: // ^if(condition){code-when-true}{code-when-false}
1.200 moko 915: // ^if(condition){code-when-true} (another condition){code-when-true} ... {code-when-false}
916: add_native_method("if", Method::CT_ANY, _if, 2, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 917:
1.194 misha 918: // ^untaint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
919: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 920:
1.194 misha 921: // ^taint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
922: add_native_method("taint", Method::CT_ANY, _taint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 923:
1.205 moko 924: // ^apply-taint[untaint lang][string]
925: add_native_method("apply-taint", Method::CT_ANY, _apply_taint, 1, 2, Method::CO_WITHOUT_FRAME);
926:
1.216 moko 927: // ^process{code}
928: // ^process[context]{code}[options hash]
1.146 paf 929: add_native_method("process", Method::CT_ANY, _process, 1, 3);
1.1 paf 930:
931: // ^rem{code}
1.185 misha 932: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 933:
934: // ^while(condition){code}
1.185 misha 935: add_native_method("while", Method::CT_ANY, _while, 2, 3, Method::CO_WITHOUT_FRAME);
1.1 paf 936:
1.216 moko 937: // ^use[file[;options hash]]
938: add_native_method("use", Method::CT_ANY, _use, 1, 2);
1.1 paf 939:
1.164 paf 940: // ^break[]
1.227 moko 941: // ^break(condition)
942: add_native_method("break", Method::CT_ANY, _break, 0, 1, Method::CO_WITHOUT_FRAME);
1.185 misha 943:
1.164 paf 944: // ^continue[]
1.227 moko 945: // ^continue(condition)
946: add_native_method("continue", Method::CT_ANY, _continue, 0, 1, Method::CO_WITHOUT_FRAME);
1.185 misha 947:
1.54 paf 948: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.239 moko 949: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1);
1.1 paf 950:
951: // ^eval(expr)
952: // ^eval(expr)[format]
1.185 misha 953: add_native_method("eval", Method::CT_ANY, _eval, 1, 2, Method::CO_WITHOUT_FRAME);
1.52 parser 954:
1.1 paf 955: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 956: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
957:
1.63 paf 958:
1.136 paf 959: // ^cache[file_spec](time){code}[{catch code}] time=0 no cache
1.65 paf 960: // ^cache[file_spec] delete cache
1.161 paf 961: // ^cache[] get current expiration time
962: add_native_method("cache", Method::CT_ANY, _cache, 0, 4);
1.63 paf 963:
1.28 parser 964: // switch
965:
966: // ^switch[value]{cases}
1.185 misha 967: add_native_method("switch", Method::CT_ANY, _switch, 2, 2, Method::CO_WITHOUT_FRAME);
1.28 parser 968:
969: // ^case[value]{code}
1.185 misha 970: add_native_method("case", Method::CT_ANY, _case, 2, 10000, Method::CO_WITHOUT_FRAME);
1.74 paf 971:
972: // try-catch
973:
974: // ^try{code}{catch code}
1.185 misha 975: add_native_method("try", Method::CT_ANY, _try_operator, 2, 3, Method::CO_WITHOUT_FRAME);
1.74 paf 976: // ^throw[$exception hash]
977: // ^throw[type;source;comment]
978: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
979:
1.150 paf 980: add_native_method("sleep", Method::CT_ANY, _sleep_operator, 1, 1);
1.10 paf 981: }
1.11 paf 982:
983: // constructor & configurator
1.1 paf 984:
1.129 paf 985: VStateless_class& VClassMAIN_create() {
986: return *new VClassMAIN;
1.1 paf 987: }
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