Annotation of parser3/src/classes/op.C, revision 1.236
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:
1.236 ! moko 21: volatile const char * IDENT_OP_C="$Id: op.C,v 1.235 2016/10/03 20:34:48 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) {
89: r.process_write(*params.get(i+1));
90: return;
91: }
92: i+=2;
93: } while (i < max_param);
94:
95: if(i == max_param)
96: r.process_write(*params.get(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)
1.175 misha 109: lang=String::L_AS_IS; // mark as simply 'as-is'. useful in html from sql
110: else
1.210 moko 111: lang=get_untaint_lang(params.as_string(0, "lang must be string"));
1.1 paf 112:
113: {
1.129 paf 114: Value& vbody=params.as_junction(params.count()-1, "body must be code");
1.1 paf 115:
1.191 misha 116: Temp_lang temp_lang(r, lang); // set temporarily specified ^untaint[language;
1.234 moko 117: Value& result=r.process(vbody); // process marking tainted with that lang
1.188 misha 118: r.write_assign_lang(result);
1.1 paf 119: }
120: }
121:
1.129 paf 122: static void _taint(Request& r, MethodParams& params) {
123: String::Language lang;
124: if(params.count()==1)
1.175 misha 125: lang=String::L_TAINTED; // mark as simply 'tainted'. useful in table:create
126: else
1.210 moko 127: lang=get_untaint_lang(params.as_string(0, "lang must be string"));
1.1 paf 128:
129: {
1.129 paf 130: Value& vbody=params.as_no_junction(params.count()-1, "body must not be code");
1.1 paf 131:
1.191 misha 132: String result(vbody.as_string(), lang); // force result language to specified
1.188 misha 133: r.write_assign_lang(result);
1.1 paf 134: }
135: }
136:
1.205 moko 137: static void _apply_taint(Request& r, MethodParams& params) {
1.210 moko 138: String::Language lang=params.count()==1 ? String::L_AS_IS : get_untaint_lang(params.as_string(0, "lang must be string"));
1.205 moko 139: const String &sbody=params.as_string(params.count()-1, "body must be string");
1.213 moko 140: String::Body result_body=sbody.cstr_to_string_body_untaint(lang, r.connection(false), &r.charsets);
1.205 moko 141: r.write_pass_lang(*new String(result_body, String::L_AS_IS));
142: }
143:
1.129 paf 144: static void _process(Request& r, MethodParams& params) {
145: Method* main_method;
146:
147: size_t index=0;
148: Value* target_self;
149: Value& maybe_target_self=params[index];
150: if(maybe_target_self.get_string() || maybe_target_self.get_junction())
151: target_self=&r.get_method_frame()->caller()->self();
152: else {
1.233 moko 153: target_self=&maybe_target_self;
154: if(params.count()==1)
155: throw Exception(PARSER_RUNTIME, 0, "no body specified");
156: index++;
1.129 paf 157: }
158:
1.1 paf 159: {
1.197 misha 160: VStateless_class *target_class=target_self->get_class();
1.116 paf 161: if(!target_class)
1.232 moko 162: throw Exception(PARSER_RUNTIME, 0, "no target class");
1.114 paf 163:
1.73 paf 164: // temporary remove language change
1.192 misha 165: Temp_lang temp_lang(r, String::L_PARSER_CODE);
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:
1.232 moko 211: r.use_buf(*target_class, source.untaint_cstr(String::L_AS_IS, r.connection(false)), main_alias, processe_file_no, line_no_alias_offset);
1.1 paf 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) {
1.202 moko 219: VMethodFrame frame(*main_method, r.get_method_frame()->caller(), *target_self);
220: frame.empty_params();
1.203 moko 221: r.op_call(frame);
222: r.write_pass_lang(frame.result());
1.1 paf 223: }
224: }
225:
1.138 paf 226: static void _rem(Request&, MethodParams& params) {
1.129 paf 227: params.as_junction(0, "body must be code");
1.1 paf 228: }
229:
1.129 paf 230: static void _while(Request& r, MethodParams& params) {
1.196 misha 231: InCycle temp(r);
1.164 paf 232:
1.170 misha 233: Value& vcondition=params.as_expression(0, "condition must be number, bool or expression");
234:
1.162 paf 235: Value& body_code=params.as_junction(1, "body must be code");
236: Value* delim_maybe_code=params.count()>2?¶ms[2]:0;
1.1 paf 237:
238: // while...
239: int endless_loop_count=0;
1.186 misha 240: if(delim_maybe_code){ // delimiter set
1.185 misha 241: bool need_delim=false;
242: while(true) {
1.235 moko 243: if(++endless_loop_count>=pa_loop_limit) // endless loop?
244: throw Exception(PARSER_RUNTIME, 0, "endless loop detected");
1.185 misha 245:
1.236 ! moko 246: if(!r.process(vcondition, false/*don't intercept string*/).as_bool())
1.185 misha 247: break;
1.1 paf 248:
1.234 moko 249: Value& sv_processed=r.process(body_code);
1.185 misha 250: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 misha 251:
1.185 misha 252: const String* s_processed=sv_processed.get_string();
1.186 misha 253: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 254: if(need_delim) // need delim & iteration produced string?
255: r.write_pass_lang(r.process(*delim_maybe_code));
256: else
257: need_delim=true;
258: }
259: r.write_pass_lang(sv_processed);
1.1 paf 260:
1.185 misha 261: if(lskip==Request::SKIP_BREAK)
262: break;
1.162 paf 263: }
1.185 misha 264: } else {
265: while(true) {
1.235 moko 266: if(++endless_loop_count>=pa_loop_limit) // endless loop?
267: throw Exception(PARSER_RUNTIME, 0, "endless loop detected");
1.185 misha 268:
1.236 ! moko 269: if(!r.process(vcondition, false/*don't intercept string*/).as_bool())
1.185 misha 270: break;
1.164 paf 271:
1.185 misha 272: r.process_write(body_code);
273: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
274:
275: if(lskip==Request::SKIP_BREAK)
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;
285:
286: if(params.count()==2)
287: if(HashStringValue* options=params.as_hash(1)) {
288: int valid_options=0;
289: for(HashStringValue::Iterator i(*options); i; i.next() ){
290:
291: String::Body key=i.key();
292: Value* value=i.value();
293:
294: if(key == "replace") {
295: valid_options++;
1.236 ! moko 296: allow_class_replace=r.process(*value).as_bool();
1.216 moko 297: }
298:
299: if(valid_options!=options->count())
300: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
301: }
302: }
303:
304: Temp_class_replace class_replace(r, allow_class_replace);
305:
1.199 misha 306: // _use could be called from the parser3 method only, so caller is always defined
1.202 moko 307: r.use_file(r.main_class, vfile.as_string(), r.get_method_filename(&r.get_method_frame()->caller()->method));
1.1 paf 308: }
309:
1.164 paf 310: static void set_skip(Request& r, Request::Skip askip) {
1.196 misha 311: if(!r.get_in_cycle())
1.227 moko 312: throw Exception(askip==Request::SKIP_BREAK ? "parser.break" : "parser.continue", 0, "without cycle");
1.164 paf 313: r.set_skip(askip);
314: }
315:
1.227 moko 316: static void _break(Request& r, MethodParams& params) {
317: if(!params.count() || params.as_bool(0, "condition must be expression", r)) set_skip(r, Request::SKIP_BREAK);
1.164 paf 318: }
319:
1.227 moko 320: static void _continue(Request& r, MethodParams& params) {
321: if(!params.count() || params.as_bool(0, "condition must be expression", r)) set_skip(r, Request::SKIP_CONTINUE);
1.164 paf 322: }
323:
1.129 paf 324: static void _for(Request& r, MethodParams& params) {
1.196 misha 325: InCycle temp(r);
1.164 paf 326:
1.129 paf 327: const String& var_name=params.as_string(0, "var name must be string");
328: int from=params.as_int(1, "from must be int", r);
329: int to=params.as_int(2, "to must be int", r);
1.186 misha 330: Value& body_code=params.as_junction(3, "body must be code");
1.129 paf 331: Value* delim_maybe_code=params.count()>4?¶ms[4]:0;
1.1 paf 332:
1.235 moko 333: if(to-from>=pa_loop_limit) // too long loop?
334: throw Exception(PARSER_RUNTIME, 0, "endless loop detected");
1.57 paf 335:
1.129 paf 336: VInt* vint=new VInt(0);
1.154 paf 337:
338: VMethodFrame& caller=*r.get_method_frame()->caller();
1.218 moko 339: r.put_element(caller, var_name, vint);
1.186 misha 340: if(delim_maybe_code){ // delimiter set
1.185 misha 341: bool need_delim=false;
342:
343: for(int i=from; i<=to; i++) {
344: vint->set_int(i);
345:
1.234 moko 346: Value& sv_processed=r.process(body_code);
1.185 misha 347: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 misha 348:
1.185 misha 349: const String* s_processed=sv_processed.get_string();
1.186 misha 350: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 351: if(need_delim) // need delim & iteration produced string?
352: r.write_pass_lang(r.process(*delim_maybe_code));
353: else
354: need_delim=true;
355: }
356: r.write_pass_lang(sv_processed);
1.1 paf 357:
1.185 misha 358: if(lskip==Request::SKIP_BREAK)
359: break;
1.1 paf 360: }
1.185 misha 361: } else {
362: for(int i=from; i<=to; i++) {
363: vint->set_int(i);
364:
365: r.process_write(body_code);
366: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.164 paf 367:
1.185 misha 368: if(lskip==Request::SKIP_BREAK)
369: break;
370: }
1.1 paf 371: }
372: }
373:
1.129 paf 374: static void _eval(Request& r, MethodParams& params) {
375: Value& expr=params.as_junction(0, "need expression");
1.1 paf 376: // evaluate expresion
1.236 ! moko 377: Value& value_result=r.process(expr,
1.165 misha 378: false/*don't intercept string*/).as_expr_result();
1.129 paf 379: if(params.count()>1) {
1.177 misha 380: const String& fmt=params.as_string(1, "fmt must be string").trim();
381: if(fmt.is_empty()){
382: r.write_no_lang(value_result);
383: } else {
384: r.write_no_lang(String(format(value_result.as_double(), fmt.cstrm())));
385: }
1.91 paf 386: } else
1.129 paf 387: r.write_no_lang(value_result);
1.1 paf 388: }
389:
1.129 paf 390: static void _connect(Request& r, MethodParams& params) {
391: Value& url=params.as_no_junction(0, "url must not be code");
392: Value& body_code=params.as_junction(1, "body must be code");
1.1 paf 393:
1.129 paf 394: Table* protocol2driver_and_client=0;
1.197 misha 395: if(Value* sql=r.main_class.get_element(String(MAIN_SQL_NAME))) {
396: if(Value* element=sql->get_element(String(MAIN_SQL_DRIVERS_NAME))) {
1.113 paf 397: protocol2driver_and_client=element->get_table();
398: }
399: }
1.11 paf 400:
1.1 paf 401: // connect
1.142 paf 402: SQL_Connection* connection=SQL_driver_manager->get_connection(url.as_string(),
1.144 paf 403: protocol2driver_and_client,
1.180 misha 404: r.charsets.source().NAME().cstr(),
405: r.request_info.document_root);
1.1 paf 406:
1.214 moko 407: Temp_connection temp_connection(r, connection);
1.63 paf 408:
1.1 paf 409: // execute body
1.53 parser 410: try {
1.189 misha 411: r.process_write(body_code);
1.129 paf 412: connection->commit();
413: connection->close();
1.75 paf 414: } catch(...) { // process problem
1.129 paf 415: connection->rollback();
416: connection->close();
417: rethrow;
1.1 paf 418: }
419: }
420:
1.41 parser 421: #ifndef DOXYGEN
1.129 paf 422: class Switch_data: public PA_Object {
423: public:
424: Request& r;
1.181 misha 425: const String* searching_string;
426: double searching_double;
1.207 misha 427: bool searching_bool;
1.129 paf 428: Value* found;
429: Value* _default;
430: public:
431: Switch_data(Request& ar, Value& asearching):
1.181 misha 432: r(ar)
433: {
434: if(asearching.is_string() || asearching.is_void()){
435: searching_string=&asearching.as_string();
436: searching_double=0;
1.207 misha 437: searching_bool=false;
1.181 misha 438: } else {
439: searching_string=0;
440: searching_double=asearching.as_double();
1.207 misha 441: searching_bool=asearching.is_bool();
1.181 misha 442: }
443: }
1.28 parser 444: };
1.41 parser 445: #endif
1.129 paf 446: static void _switch(Request& r, MethodParams& params) {
1.236 ! moko 447: Switch_data* data=new Switch_data(r, r.process(params[0]));
1.215 moko 448: Temp_hash_value<HashString<void*>, void*> switch_data_setter(&r.classes_conf, switch_data_name, data);
1.28 parser 449:
1.129 paf 450: Value& cases_code=params.as_junction(1, "switch cases must be code");
1.82 paf 451: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
452: // because of stacked WWrapper used there as wcontext
1.84 paf 453: r.process(cases_code, true/*intercept_string*/);
1.147 paf 454: if(Value* selected_code=data->found? data->found: data->_default)
1.107 paf 455: r.write_pass_lang(r.process(*selected_code));
1.28 parser 456: }
457:
1.129 paf 458: static void _case(Request& r, MethodParams& params) {
459: Switch_data* data=static_cast<Switch_data*>(r.classes_conf.get(switch_data_name));
1.38 parser 460: if(!data)
1.166 misha 461: throw Exception(PARSER_RUNTIME,
1.129 paf 462: 0,
1.38 parser 463: "without switch");
1.28 parser 464:
1.181 misha 465: if(data->found) // matches already was found
466: return;
467:
1.129 paf 468: int count=params.count();
1.184 misha 469: Value* code=¶ms.as_expression(--count, "case result must be code");
470:
471: #ifdef USE_DESTRUCTORS
472: Junction *j=code->get_junction();
473: if (j){
474: code=new VJunction(j->self,j->method,j->method_frame,j->rcontext,j->wcontext,j->code);
475: if (j->wcontext) j->wcontext->attach_junction((VJunction *)code);
476: }
477: #endif
1.83 paf 478:
1.181 misha 479: for(int i=0; i<count; i++){
1.236 ! moko 480: Value& value=r.process(params[i]);
1.28 parser 481:
1.181 misha 482: if(value.is_string() && value.as_string() == CASE_DEFAULT_VALUE){
1.184 misha 483: data->_default=code;
1.181 misha 484: continue;
1.28 parser 485: }
486:
487: bool matches;
1.181 misha 488: if(data->searching_string)
489: matches=(*data->searching_string) == value.as_string();
1.207 misha 490: else if(data->searching_bool || value.is_bool())
491: matches=(data->searching_double != 0) == value.as_bool();
1.28 parser 492: else
1.181 misha 493: matches=data->searching_double == value.as_double();
1.82 paf 494:
1.181 misha 495: if(matches){
1.184 misha 496: data->found=code;
1.28 parser 497: break;
498: }
499: }
500: }
1.136 paf 501: #ifndef DOXYGEN
502: struct Try_catch_result {
1.234 moko 503: ValueRef processed_code;
1.136 paf 504: const String* exception_should_be_handled;
505:
506: Try_catch_result(): exception_should_be_handled(0) {}
507: };
1.229 moko 508:
509: /// Auto-object used for temporary changing Request::skip.
510: class Temp_skip {
511: Request& frequest;
512: Request::Skip saved_skip;
513: public:
514: Temp_skip(Request& arequest) : frequest(arequest), saved_skip(arequest.get_skip()) {
515: arequest.set_skip(Request::SKIP_NOTHING);
516: }
517: ~Temp_skip() {
518: if(frequest.get_skip() == Request::SKIP_NOTHING)
519: frequest.set_skip(saved_skip);
520: }
521: };
1.136 paf 522: #endif
523:
524: /// used by ^try and ^cache, @returns $exception.handled[string] if any
525: template<class I>
1.234 moko 526: 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 527: Try_catch_result result;
1.179 misha 528:
1.228 moko 529: // minor bug: context not restored if only finally code is present, see #1062
1.136 paf 530: if(!catch_code) {
531: result.processed_code=body_code(r, info);
532: return result;
533: }
534:
535: // taking snapshot of try-context
536: Request_context_saver try_context(r);
537: try {
538: result.processed_code=body_code(r, info);
539: } catch(const Exception& e) {
1.230 moko 540: Request_context_saver throw_context(r); // remembering exception stack trace
541:
1.136 paf 542: Request::Exception_details details=r.get_details(e);
1.230 moko 543:
1.228 moko 544: try_context.restore(); // restoring try-context for code after try and catch-code
1.136 paf 545:
1.228 moko 546: {
547: Temp_value_element temp(r, *catch_code->get_junction()->method_frame, exception_var_name, &details.vhash);
1.229 moko 548: Temp_skip temp_skip(r);
1.228 moko 549: result.processed_code=r.process(*catch_code);
550: }
1.136 paf 551:
1.228 moko 552: // retriving $exception.handled
1.136 paf 553: Value* vhandled=details.vhash.hash().get(exception_handled_part_name);
554:
555: bool bhandled=false;
556: if(vhandled) {
557: if(vhandled->is_string()) { // not simple $exception.handled(1/0)?
1.228 moko 558: if(bhandled=could_be_handled_by_caller) { // and we can possibly handle it
1.160 paf 559: result.exception_should_be_handled=vhandled->get_string(); // considering 'recovered' and let the caller recover
560: }
561: } else
1.179 misha 562: bhandled=vhandled->as_bool();
1.136 paf 563: }
564:
1.230 moko 565: if(!bhandled){
566: throw_context.restore(); // restoring exception stack trace creared by try_context.restore()
1.136 paf 567: rethrow;
1.230 moko 568: }
1.136 paf 569: }
1.179 misha 570:
1.136 paf 571: return result;
572: }
1.28 parser 573:
1.234 moko 574: static Value& process_try_body_code(Request& r, Value* body_code) {
1.222 moko 575: return r.process(*body_code);
576: }
577:
1.63 paf 578: // cache--
579:
580: // consts
581:
1.152 paf 582: const int DATA_STRING_SERIALIZED_VERSION=0x0006;
1.63 paf 583:
584: // helper types
585:
586: #ifndef DOXYGEN
587: struct Data_string_serialized_prolog {
588: int version;
1.79 paf 589: time_t expires;
1.63 paf 590: };
591: #endif
592:
1.68 paf 593: void cache_delete(const String& file_spec) {
1.167 misha 594: file_delete(file_spec, false/*fail_on_problem*/);
1.63 paf 595: }
1.69 paf 596:
597: #ifndef DOXYGEN
1.135 paf 598: struct Cache_scope {
1.129 paf 599: public:
1.79 paf 600: time_t expires;
1.135 paf 601: const String* body_from_disk;
1.79 paf 602: };
1.69 paf 603: struct Locked_process_and_cache_put_action_info {
604: Request *r;
1.136 paf 605: Cache_scope *scope;
1.167 misha 606: Value* body_code;
607: Value* catch_code;
1.136 paf 608: const String* processed_code;
1.69 paf 609: };
610: #endif
1.136 paf 611:
612:
613:
1.234 moko 614: static Value& process_cache_body_code(Request& r, Value* body_code) {
615: return r.process(*body_code);
1.136 paf 616: }
617:
1.129 paf 618: /* @todo maybe network order worth spending some effort?
619: don't bothering myself with network byte order,
620: am not planning to be able to move resulting file across platforms
621: */
1.69 paf 622: static void locked_process_and_cache_put_action(int f, void *context) {
623: Locked_process_and_cache_put_action_info& info=
624: *static_cast<Locked_process_and_cache_put_action_info *>(context);
1.129 paf 625:
1.160 paf 626: const String* body_from_disk=info.scope->body_from_disk;
1.69 paf 627: // body->process
1.136 paf 628: Try_catch_result result=try_catch(*info.r,
629: process_cache_body_code, info.body_code,
1.160 paf 630: info.catch_code, body_from_disk!=0 /*we have something old=we can handle=recover later*/);
1.136 paf 631:
632: if(result.exception_should_be_handled) {
633: if(*result.exception_should_be_handled==CACHE_EXCEPTION_HANDLED_CACHE_NAME) {
1.160 paf 634: assert(body_from_disk);
635: info.processed_code=body_from_disk;
1.136 paf 636: } else
1.166 misha 637: throw Exception(PARSER_RUNTIME,
1.136 paf 638: result.exception_should_be_handled,
1.219 moko 639: "$" EXCEPTION_VAR_NAME "." EXCEPTION_HANDLED_PART_NAME " value must be "
640: "either boolean or string '" CACHE_EXCEPTION_HANDLED_CACHE_NAME "'");
1.136 paf 641: } else
1.234 moko 642: info.processed_code=&((Value &)result.processed_code).as_string();
1.69 paf 643:
1.79 paf 644: // expiration time not spoiled by ^cache(0) or something?
1.136 paf 645: if(info.scope->expires > time(0)) {
1.79 paf 646: // string -serialize> buffer
1.136 paf 647: String::Cm serialized=info.processed_code->serialize(
1.129 paf 648: sizeof(Data_string_serialized_prolog));
1.79 paf 649: Data_string_serialized_prolog& prolog=
1.129 paf 650: *reinterpret_cast<Data_string_serialized_prolog *>(serialized.str);
1.79 paf 651: prolog.version=DATA_STRING_SERIALIZED_VERSION;
1.136 paf 652: prolog.expires=info.scope->expires;
1.79 paf 653:
654: // buffer -write> file
1.129 paf 655: write(f, serialized.str, serialized.length);
1.79 paf 656: } else // expired!
1.136 paf 657: info.scope->expires=0; // flag it so that could be easily checked by caller
1.69 paf 658: }
1.129 paf 659: const String* locked_process_and_cache_put(Request& r,
1.128 paf 660: Value& body_code,
1.136 paf 661: Value* catch_code,
662: Cache_scope& scope,
663: const String& file_spec)
664: {
1.140 paf 665: Locked_process_and_cache_put_action_info info={&r, &scope, &body_code, catch_code, 0};
1.69 paf 666:
1.129 paf 667: const String* result=file_write_action_under_lock(
1.69 paf 668: file_spec,
1.168 misha 669: "cache_put",
670: locked_process_and_cache_put_action,
671: &info,
1.69 paf 672: false/*as_text*/,
673: false/*do_append*/,
1.173 misha 674: false/*block == don't wait till other thread release lock*/,
675: false/*dun throw exception if lock failed*/) ? info.processed_code: 0;
1.168 misha 676:
1.100 paf 677: time_t now=time(0);
1.136 paf 678: if(scope.expires<=now)
1.79 paf 679: cache_delete(file_spec);
680: return result;
1.63 paf 681: }
1.229 moko 682:
1.137 paf 683: #ifndef DOXYGEN
1.135 paf 684: struct Cache_get_result {
685: const String* body;
686: bool expired;
1.137 paf 687: };
688: #endif
1.229 moko 689:
1.137 paf 690: static Cache_get_result cache_get(Request_charsets& charsets, const String& file_spec, time_t now) {
1.140 paf 691: Cache_get_result result={0, false};
1.135 paf 692:
1.129 paf 693: File_read_result file=file_read(charsets, file_spec,
1.63 paf 694: false/*as_text*/,
1.129 paf 695: 0, //no params
696: false/*fail_on_read_problem*/);
697: if(file.success && file.length/* ignore reads which are empty due to
1.72 paf 698: non-unary open+lockEX conflict with lockSH */) {
1.129 paf 699:
1.72 paf 700: Data_string_serialized_prolog& prolog=
1.129 paf 701: *reinterpret_cast<Data_string_serialized_prolog *>(file.str);
1.63 paf 702:
1.135 paf 703: String* body=new String;
1.72 paf 704: if(
1.129 paf 705: file.length>=sizeof(Data_string_serialized_prolog)
1.135 paf 706: && prolog.version==DATA_STRING_SERIALIZED_VERSION) {
707: if(body->deserialize(sizeof(Data_string_serialized_prolog), file.str, file.length)) {
708: result.body=body;
709: result.expired=prolog.expires <= now;
710: }
711: }
1.72 paf 712: }
1.63 paf 713:
1.135 paf 714: return result;
1.63 paf 715: }
1.129 paf 716: static time_t as_expires(Request& r, MethodParams& params,
1.79 paf 717: int index, time_t now) {
718: time_t result;
1.197 misha 719: if(Value* vdate=params[index].as(VDATE_TYPE))
1.220 moko 720: result=(time_t)(static_cast<VDate*>(vdate)->get_time());
1.79 paf 721: else
1.129 paf 722: result=now+(time_t)params.as_double(index, "lifespan must be date or number", r);
1.79 paf 723:
724: return result;
725: }
1.229 moko 726:
1.129 paf 727: static const String& as_file_spec(Request& r, MethodParams& params, int index) {
728: return r.absolute(params.as_string(index, "filespec must be string"));
1.79 paf 729: }
1.229 moko 730:
1.129 paf 731: static void _cache(Request& r, MethodParams& params) {
1.173 misha 732: if(params.count()==0) {
733: // ^cache[] -- return current expiration time
1.158 paf 734: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
735: if(!scope)
1.221 moko 736: throw Exception(PARSER_RUNTIME, 0, "expire-time get without cache");
737: r.write_no_lang(*new VDate((pa_time_t)scope->expires));
1.158 paf 738: return;
739: }
740:
1.79 paf 741: time_t now=time(0);
742:
1.129 paf 743: if(params.count()==1) {
1.173 misha 744: // ^cache[filename] ^cache(seconds) ^cache[expires date]
1.129 paf 745: if(params[0].is_string()) { // filename?
1.79 paf 746: cache_delete(as_file_spec(r, params, 0));
747: return;
748: }
749:
750: // secods|expires date
1.135 paf 751: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
752: if(!scope)
1.166 misha 753: throw Exception(PARSER_RUNTIME,
1.129 paf 754: 0,
1.79 paf 755: "expire-time reducing instruction without cache");
756:
1.129 paf 757: time_t expires=as_expires(r, params, 0, now);
1.135 paf 758: if(expires < scope->expires)
759: scope->expires=expires;
1.79 paf 760:
761: return;
1.149 paf 762: } else if(params.count()<3)
1.166 misha 763: throw Exception(PARSER_RUNTIME,
1.149 paf 764: 0,
765: "invalid number of parameters");
1.63 paf 766:
767: // file_spec, expires, body code
1.172 misha 768: const String& file_spec=as_file_spec(r, params, 0);
1.65 paf 769:
1.141 paf 770: Cache_scope scope={as_expires(r, params, 1, now), 0};
1.135 paf 771:
1.215 moko 772: Temp_hash_value<HashString<void*>, void*> cache_scope_setter(&r.classes_conf, cache_data_name, &scope);
1.136 paf 773: Value& body_code=params.as_junction(2, "body_code must be code");
774: Value* catch_code=0;
775: if(params.count()>3)
776: catch_code=¶ms.as_junction(3, "catch_code must be code");
1.63 paf 777:
1.168 misha 778: if(scope.expires>now) {
779: Cache_get_result cached=cache_get(r.charsets, file_spec, now);
1.69 paf 780:
1.168 misha 781: if(cached.body) { // have cached copy
1.174 misha 782: if(cached.expired) {
783: scope.body_from_disk=cached.body; // storing for user to retrive it with ^cache[]
784: } else {
785: // and it's not expired yet write it out
1.168 misha 786: r.write_assign_lang(*cached.body);
787: // happy with it
788: return;
789: }
790: }
791:
792: // no cached info or it's already expired
1.173 misha 793:
794: // trying to process it under lock and store result in file
1.174 misha 795: const String* processed_body=locked_process_and_cache_put(r, body_code, catch_code, scope, file_spec);
1.173 misha 796: if(processed_body){
1.174 misha 797: // write it out
798: r.write_assign_lang(*processed_body);
799: // happy with it
800: return;
1.173 misha 801: } else {
802: // we fail while get exclusive lock. nvm, we just execute body_code a bit later
1.174 misha 803: }
1.69 paf 804: } else {
1.79 paf 805: // instructed not to cache; forget cached copy
1.68 paf 806: cache_delete(file_spec);
1.69 paf 807: }
1.168 misha 808:
1.222 moko 809: // process without caching
810: if(catch_code){
811: Try_catch_result result=try_catch(r, process_try_body_code, &body_code, catch_code);
812: r.write_assign_lang(result.processed_code);
813: } else {
1.234 moko 814: r.write_assign_lang(r.process_to_string(body_code));
1.222 moko 815: }
1.63 paf 816: }
817:
1.129 paf 818: static void _try_operator(Request& r, MethodParams& params) {
819: Value& body_code=params.as_junction(0, "body_code must be code");
820: Value& catch_code=params.as_junction(1, "catch_code must be code");
1.179 misha 821: Value* finally_code=(params.count()==3) ? ¶ms.as_junction(2, "finally_code must be code") : 0;
822:
823: Try_catch_result result;
1.229 moko 824:
1.179 misha 825: try{
1.229 moko 826: // process try and catch code
1.222 moko 827: result=try_catch(r, process_try_body_code, &body_code, &catch_code);
1.179 misha 828: } catch(...){
1.229 moko 829: // process finally code but ignore the result
830: if(finally_code){
831: Temp_skip temp(r);
1.234 moko 832: Value &finally_result=r.process(*finally_code);
1.229 moko 833: }
1.179 misha 834: rethrow;
835: }
1.74 paf 836:
1.229 moko 837: // process finally code
838: if(finally_code){
839: Temp_skip temp(r);
1.234 moko 840: Value& finally_result=r.process(*finally_code);
1.229 moko 841:
1.234 moko 842: // no exception in try/catch or finally, writing processed body_code or catch_code
843: r.write_pass_lang(result.processed_code);
1.123 paf 844:
1.234 moko 845: // write out processed finally code
846: r.write_pass_lang(finally_result);
847: } else {
848: // no exception in try/catch, writing processed body_code or catch_code
849: r.write_pass_lang(result.processed_code);
850: }
1.179 misha 851:
1.74 paf 852: }
853:
1.138 paf 854: static void _throw_operator(Request&, MethodParams& params) {
1.178 misha 855: if(params.count()==1 && !params[0].is_string()) {
1.129 paf 856: if(HashStringValue *hash=params[0].get_hash()) {
857: const char* type=0;
858: if(Value* value=hash->get(exception_type_part_name))
1.78 paf 859: type=value->as_string().cstr();
1.129 paf 860: const String* source=0;
861: if(Value* value=hash->get(exception_source_part_name))
1.74 paf 862: source=&value->as_string();
1.138 paf 863: const char* comment=0;
1.129 paf 864: if(Value* value=hash->get(exception_comment_part_name))
1.74 paf 865: comment=value->as_string().cstr();
866:
1.78 paf 867: throw Exception(type,
1.129 paf 868: source?source:0,
869: "%s", comment?comment:"");
1.74 paf 870: } else
1.166 misha 871: throw Exception(PARSER_RUNTIME,
1.129 paf 872: 0,
1.178 misha 873: "one-param version has hash or string param");
1.74 paf 874: } else {
1.129 paf 875: const char* type=params.as_string(0, "type must be string").cstr();
1.178 misha 876: const String* source=params.count()>1? ¶ms.as_string(1, "source must be string"):0;
877: const char* comment=params.count()>2? params.as_string(2, "comment must be string").cstr():0;
878: throw Exception(type, source, "%s", comment?comment:"");
1.74 paf 879: }
1.132 paf 880: }
1.129 paf 881:
1.150 paf 882: static void _sleep_operator(Request& r, MethodParams& params) {
883: double seconds=params.as_double(0, "seconds must be double", r);
1.206 moko 884: if(seconds>0)
885: pa_sleep((int)trunc(seconds), (int)trunc((seconds-trunc(seconds))*1000000));
1.150 paf 886: }
887:
1.129 paf 888: #if defined(WIN32) && defined(_DEBUG)
889: # define PA_BPT
1.138 paf 890: static void _bpt(Request&, MethodParams&) {
1.129 paf 891: _asm int 3;
892: }
893: #endif
894:
1.10 paf 895: // constructor
896:
1.226 moko 897: VClassMAIN::VClassMAIN(): VClass(MAIN_CLASS_NAME) {
1.129 paf 898:
899: #ifdef PA_BPT
900: // ^bpt[]
901: add_native_method("bpt", Method::CT_ANY, _bpt, 0, 0);
902: #endif
1.121 paf 903:
1.1 paf 904: // ^if(condition){code-when-true}
905: // ^if(condition){code-when-true}{code-when-false}
1.200 moko 906: // ^if(condition){code-when-true} (another condition){code-when-true} ... {code-when-false}
907: add_native_method("if", Method::CT_ANY, _if, 2, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 908:
1.194 misha 909: // ^untaint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
910: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 911:
1.194 misha 912: // ^taint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
913: add_native_method("taint", Method::CT_ANY, _taint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 914:
1.205 moko 915: // ^apply-taint[untaint lang][string]
916: add_native_method("apply-taint", Method::CT_ANY, _apply_taint, 1, 2, Method::CO_WITHOUT_FRAME);
917:
1.216 moko 918: // ^process{code}
919: // ^process[context]{code}[options hash]
1.146 paf 920: add_native_method("process", Method::CT_ANY, _process, 1, 3);
1.1 paf 921:
922: // ^rem{code}
1.185 misha 923: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 924:
925: // ^while(condition){code}
1.185 misha 926: add_native_method("while", Method::CT_ANY, _while, 2, 3, Method::CO_WITHOUT_FRAME);
1.1 paf 927:
1.216 moko 928: // ^use[file[;options hash]]
929: add_native_method("use", Method::CT_ANY, _use, 1, 2);
1.1 paf 930:
1.164 paf 931: // ^break[]
1.227 moko 932: // ^break(condition)
933: add_native_method("break", Method::CT_ANY, _break, 0, 1, Method::CO_WITHOUT_FRAME);
1.185 misha 934:
1.164 paf 935: // ^continue[]
1.227 moko 936: // ^continue(condition)
937: add_native_method("continue", Method::CT_ANY, _continue, 0, 1, Method::CO_WITHOUT_FRAME);
1.185 misha 938:
1.54 paf 939: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.185 misha 940: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1, Method::CO_WITHOUT_WCONTEXT);
1.1 paf 941:
942: // ^eval(expr)
943: // ^eval(expr)[format]
1.185 misha 944: add_native_method("eval", Method::CT_ANY, _eval, 1, 2, Method::CO_WITHOUT_FRAME);
1.52 parser 945:
1.1 paf 946: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 947: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
948:
1.63 paf 949:
1.136 paf 950: // ^cache[file_spec](time){code}[{catch code}] time=0 no cache
1.65 paf 951: // ^cache[file_spec] delete cache
1.161 paf 952: // ^cache[] get current expiration time
953: add_native_method("cache", Method::CT_ANY, _cache, 0, 4);
1.63 paf 954:
1.28 parser 955: // switch
956:
957: // ^switch[value]{cases}
1.185 misha 958: add_native_method("switch", Method::CT_ANY, _switch, 2, 2, Method::CO_WITHOUT_FRAME);
1.28 parser 959:
960: // ^case[value]{code}
1.185 misha 961: add_native_method("case", Method::CT_ANY, _case, 2, 10000, Method::CO_WITHOUT_FRAME);
1.74 paf 962:
963: // try-catch
964:
965: // ^try{code}{catch code}
1.185 misha 966: add_native_method("try", Method::CT_ANY, _try_operator, 2, 3, Method::CO_WITHOUT_FRAME);
1.74 paf 967: // ^throw[$exception hash]
968: // ^throw[type;source;comment]
969: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
970:
1.150 paf 971: add_native_method("sleep", Method::CT_ANY, _sleep_operator, 1, 1);
1.10 paf 972: }
1.11 paf 973:
974: // constructor & configurator
1.1 paf 975:
1.129 paf 976: VStateless_class& VClassMAIN_create() {
977: return *new VClassMAIN;
1.1 paf 978: }
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