Annotation of parser3/src/classes/op.C, revision 1.238
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:
1.238 ! moko 21: volatile const char * IDENT_OP_C="$Id: op.C,v 1.237 2016/10/04 22:05:28 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)
1.175 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:
1.237 moko 246: if(!r.process(vcondition).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:
1.237 moko 269: if(!r.process(vcondition).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
1.237 moko 377: Value& value_result=r.process(expr).as_expr_result();
1.129 paf 378: if(params.count()>1) {
1.177 misha 379: const String& fmt=params.as_string(1, "fmt must be string").trim();
380: if(fmt.is_empty()){
381: r.write_no_lang(value_result);
382: } else {
383: r.write_no_lang(String(format(value_result.as_double(), fmt.cstrm())));
384: }
1.91 paf 385: } else
1.129 paf 386: r.write_no_lang(value_result);
1.1 paf 387: }
388:
1.129 paf 389: static void _connect(Request& r, MethodParams& params) {
390: Value& url=params.as_no_junction(0, "url must not be code");
391: Value& body_code=params.as_junction(1, "body must be code");
1.1 paf 392:
1.129 paf 393: Table* protocol2driver_and_client=0;
1.197 misha 394: if(Value* sql=r.main_class.get_element(String(MAIN_SQL_NAME))) {
395: if(Value* element=sql->get_element(String(MAIN_SQL_DRIVERS_NAME))) {
1.113 paf 396: protocol2driver_and_client=element->get_table();
397: }
398: }
1.11 paf 399:
1.1 paf 400: // connect
1.142 paf 401: SQL_Connection* connection=SQL_driver_manager->get_connection(url.as_string(),
1.144 paf 402: protocol2driver_and_client,
1.180 misha 403: r.charsets.source().NAME().cstr(),
404: r.request_info.document_root);
1.1 paf 405:
1.214 moko 406: Temp_connection temp_connection(r, connection);
1.63 paf 407:
1.1 paf 408: // execute body
1.53 parser 409: try {
1.189 misha 410: r.process_write(body_code);
1.129 paf 411: connection->commit();
412: connection->close();
1.75 paf 413: } catch(...) { // process problem
1.129 paf 414: connection->rollback();
415: connection->close();
416: rethrow;
1.1 paf 417: }
418: }
419:
1.41 parser 420: #ifndef DOXYGEN
1.129 paf 421: class Switch_data: public PA_Object {
422: public:
423: Request& r;
1.181 misha 424: const String* searching_string;
425: double searching_double;
1.207 misha 426: bool searching_bool;
1.129 paf 427: Value* found;
428: Value* _default;
429: public:
430: Switch_data(Request& ar, Value& asearching):
1.181 misha 431: r(ar)
432: {
433: if(asearching.is_string() || asearching.is_void()){
434: searching_string=&asearching.as_string();
435: searching_double=0;
1.207 misha 436: searching_bool=false;
1.181 misha 437: } else {
438: searching_string=0;
439: searching_double=asearching.as_double();
1.207 misha 440: searching_bool=asearching.is_bool();
1.181 misha 441: }
442: }
1.28 parser 443: };
1.41 parser 444: #endif
1.129 paf 445: static void _switch(Request& r, MethodParams& params) {
1.236 moko 446: Switch_data* data=new Switch_data(r, r.process(params[0]));
1.215 moko 447: Temp_hash_value<HashString<void*>, void*> switch_data_setter(&r.classes_conf, switch_data_name, data);
1.28 parser 448:
1.129 paf 449: Value& cases_code=params.as_junction(1, "switch cases must be code");
1.82 paf 450: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
451: // because of stacked WWrapper used there as wcontext
1.237 moko 452: r.process(cases_code);
1.147 paf 453: if(Value* selected_code=data->found? data->found: data->_default)
1.107 paf 454: r.write_pass_lang(r.process(*selected_code));
1.28 parser 455: }
456:
1.129 paf 457: static void _case(Request& r, MethodParams& params) {
458: Switch_data* data=static_cast<Switch_data*>(r.classes_conf.get(switch_data_name));
1.38 parser 459: if(!data)
1.166 misha 460: throw Exception(PARSER_RUNTIME,
1.129 paf 461: 0,
1.38 parser 462: "without switch");
1.28 parser 463:
1.181 misha 464: if(data->found) // matches already was found
465: return;
466:
1.129 paf 467: int count=params.count();
1.184 misha 468: Value* code=¶ms.as_expression(--count, "case result must be code");
469:
470: #ifdef USE_DESTRUCTORS
471: Junction *j=code->get_junction();
472: if (j){
473: code=new VJunction(j->self,j->method,j->method_frame,j->rcontext,j->wcontext,j->code);
474: if (j->wcontext) j->wcontext->attach_junction((VJunction *)code);
475: }
476: #endif
1.83 paf 477:
1.181 misha 478: for(int i=0; i<count; i++){
1.236 moko 479: Value& value=r.process(params[i]);
1.28 parser 480:
1.181 misha 481: if(value.is_string() && value.as_string() == CASE_DEFAULT_VALUE){
1.184 misha 482: data->_default=code;
1.181 misha 483: continue;
1.28 parser 484: }
485:
486: bool matches;
1.181 misha 487: if(data->searching_string)
488: matches=(*data->searching_string) == value.as_string();
1.207 misha 489: else if(data->searching_bool || value.is_bool())
490: matches=(data->searching_double != 0) == value.as_bool();
1.28 parser 491: else
1.181 misha 492: matches=data->searching_double == value.as_double();
1.82 paf 493:
1.181 misha 494: if(matches){
1.184 misha 495: data->found=code;
1.28 parser 496: break;
497: }
498: }
499: }
1.136 paf 500: #ifndef DOXYGEN
501: struct Try_catch_result {
1.234 moko 502: ValueRef processed_code;
1.136 paf 503: const String* exception_should_be_handled;
504:
505: Try_catch_result(): exception_should_be_handled(0) {}
506: };
1.229 moko 507:
508: /// Auto-object used for temporary changing Request::skip.
509: class Temp_skip {
510: Request& frequest;
511: Request::Skip saved_skip;
512: public:
513: Temp_skip(Request& arequest) : frequest(arequest), saved_skip(arequest.get_skip()) {
514: arequest.set_skip(Request::SKIP_NOTHING);
515: }
516: ~Temp_skip() {
517: if(frequest.get_skip() == Request::SKIP_NOTHING)
518: frequest.set_skip(saved_skip);
519: }
520: };
1.136 paf 521: #endif
522:
523: /// used by ^try and ^cache, @returns $exception.handled[string] if any
524: template<class I>
1.234 moko 525: 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 526: Try_catch_result result;
1.179 misha 527:
1.228 moko 528: // minor bug: context not restored if only finally code is present, see #1062
1.136 paf 529: if(!catch_code) {
530: result.processed_code=body_code(r, info);
531: return result;
532: }
533:
534: // taking snapshot of try-context
535: Request_context_saver try_context(r);
536: try {
537: result.processed_code=body_code(r, info);
538: } catch(const Exception& e) {
1.230 moko 539: Request_context_saver throw_context(r); // remembering exception stack trace
540:
1.136 paf 541: Request::Exception_details details=r.get_details(e);
1.230 moko 542:
1.228 moko 543: try_context.restore(); // restoring try-context for code after try and catch-code
1.136 paf 544:
1.228 moko 545: {
546: Temp_value_element temp(r, *catch_code->get_junction()->method_frame, exception_var_name, &details.vhash);
1.229 moko 547: Temp_skip temp_skip(r);
1.228 moko 548: result.processed_code=r.process(*catch_code);
549: }
1.136 paf 550:
1.228 moko 551: // retriving $exception.handled
1.136 paf 552: Value* vhandled=details.vhash.hash().get(exception_handled_part_name);
553:
554: bool bhandled=false;
555: if(vhandled) {
556: if(vhandled->is_string()) { // not simple $exception.handled(1/0)?
1.228 moko 557: if(bhandled=could_be_handled_by_caller) { // and we can possibly handle it
1.160 paf 558: result.exception_should_be_handled=vhandled->get_string(); // considering 'recovered' and let the caller recover
559: }
560: } else
1.179 misha 561: bhandled=vhandled->as_bool();
1.136 paf 562: }
563:
1.230 moko 564: if(!bhandled){
565: throw_context.restore(); // restoring exception stack trace creared by try_context.restore()
1.136 paf 566: rethrow;
1.230 moko 567: }
1.136 paf 568: }
1.179 misha 569:
1.136 paf 570: return result;
571: }
1.28 parser 572:
1.234 moko 573: static Value& process_try_body_code(Request& r, Value* body_code) {
1.222 moko 574: return r.process(*body_code);
575: }
576:
1.63 paf 577: // cache--
578:
579: // consts
580:
1.152 paf 581: const int DATA_STRING_SERIALIZED_VERSION=0x0006;
1.63 paf 582:
583: // helper types
584:
585: #ifndef DOXYGEN
586: struct Data_string_serialized_prolog {
587: int version;
1.79 paf 588: time_t expires;
1.63 paf 589: };
590: #endif
591:
1.68 paf 592: void cache_delete(const String& file_spec) {
1.167 misha 593: file_delete(file_spec, false/*fail_on_problem*/);
1.63 paf 594: }
1.69 paf 595:
596: #ifndef DOXYGEN
1.135 paf 597: struct Cache_scope {
1.129 paf 598: public:
1.79 paf 599: time_t expires;
1.135 paf 600: const String* body_from_disk;
1.79 paf 601: };
1.69 paf 602: struct Locked_process_and_cache_put_action_info {
603: Request *r;
1.136 paf 604: Cache_scope *scope;
1.167 misha 605: Value* body_code;
606: Value* catch_code;
1.136 paf 607: const String* processed_code;
1.69 paf 608: };
609: #endif
1.136 paf 610:
611:
612:
1.234 moko 613: static Value& process_cache_body_code(Request& r, Value* body_code) {
614: return r.process(*body_code);
1.136 paf 615: }
616:
1.129 paf 617: /* @todo maybe network order worth spending some effort?
618: don't bothering myself with network byte order,
619: am not planning to be able to move resulting file across platforms
620: */
1.69 paf 621: static void locked_process_and_cache_put_action(int f, void *context) {
622: Locked_process_and_cache_put_action_info& info=
623: *static_cast<Locked_process_and_cache_put_action_info *>(context);
1.129 paf 624:
1.160 paf 625: const String* body_from_disk=info.scope->body_from_disk;
1.69 paf 626: // body->process
1.136 paf 627: Try_catch_result result=try_catch(*info.r,
628: process_cache_body_code, info.body_code,
1.160 paf 629: info.catch_code, body_from_disk!=0 /*we have something old=we can handle=recover later*/);
1.136 paf 630:
631: if(result.exception_should_be_handled) {
632: if(*result.exception_should_be_handled==CACHE_EXCEPTION_HANDLED_CACHE_NAME) {
1.160 paf 633: assert(body_from_disk);
634: info.processed_code=body_from_disk;
1.136 paf 635: } else
1.166 misha 636: throw Exception(PARSER_RUNTIME,
1.136 paf 637: result.exception_should_be_handled,
1.219 moko 638: "$" EXCEPTION_VAR_NAME "." EXCEPTION_HANDLED_PART_NAME " value must be "
639: "either boolean or string '" CACHE_EXCEPTION_HANDLED_CACHE_NAME "'");
1.136 paf 640: } else
1.234 moko 641: info.processed_code=&((Value &)result.processed_code).as_string();
1.69 paf 642:
1.79 paf 643: // expiration time not spoiled by ^cache(0) or something?
1.136 paf 644: if(info.scope->expires > time(0)) {
1.79 paf 645: // string -serialize> buffer
1.136 paf 646: String::Cm serialized=info.processed_code->serialize(
1.129 paf 647: sizeof(Data_string_serialized_prolog));
1.79 paf 648: Data_string_serialized_prolog& prolog=
1.129 paf 649: *reinterpret_cast<Data_string_serialized_prolog *>(serialized.str);
1.79 paf 650: prolog.version=DATA_STRING_SERIALIZED_VERSION;
1.136 paf 651: prolog.expires=info.scope->expires;
1.79 paf 652:
653: // buffer -write> file
1.129 paf 654: write(f, serialized.str, serialized.length);
1.79 paf 655: } else // expired!
1.136 paf 656: info.scope->expires=0; // flag it so that could be easily checked by caller
1.69 paf 657: }
1.129 paf 658: const String* locked_process_and_cache_put(Request& r,
1.128 paf 659: Value& body_code,
1.136 paf 660: Value* catch_code,
661: Cache_scope& scope,
662: const String& file_spec)
663: {
1.140 paf 664: Locked_process_and_cache_put_action_info info={&r, &scope, &body_code, catch_code, 0};
1.69 paf 665:
1.129 paf 666: const String* result=file_write_action_under_lock(
1.69 paf 667: file_spec,
1.168 misha 668: "cache_put",
669: locked_process_and_cache_put_action,
670: &info,
1.69 paf 671: false/*as_text*/,
672: false/*do_append*/,
1.173 misha 673: false/*block == don't wait till other thread release lock*/,
674: false/*dun throw exception if lock failed*/) ? info.processed_code: 0;
1.168 misha 675:
1.100 paf 676: time_t now=time(0);
1.136 paf 677: if(scope.expires<=now)
1.79 paf 678: cache_delete(file_spec);
679: return result;
1.63 paf 680: }
1.229 moko 681:
1.137 paf 682: #ifndef DOXYGEN
1.135 paf 683: struct Cache_get_result {
684: const String* body;
685: bool expired;
1.137 paf 686: };
687: #endif
1.229 moko 688:
1.137 paf 689: static Cache_get_result cache_get(Request_charsets& charsets, const String& file_spec, time_t now) {
1.140 paf 690: Cache_get_result result={0, false};
1.135 paf 691:
1.129 paf 692: File_read_result file=file_read(charsets, file_spec,
1.63 paf 693: false/*as_text*/,
1.129 paf 694: 0, //no params
695: false/*fail_on_read_problem*/);
696: if(file.success && file.length/* ignore reads which are empty due to
1.72 paf 697: non-unary open+lockEX conflict with lockSH */) {
1.129 paf 698:
1.72 paf 699: Data_string_serialized_prolog& prolog=
1.129 paf 700: *reinterpret_cast<Data_string_serialized_prolog *>(file.str);
1.63 paf 701:
1.135 paf 702: String* body=new String;
1.72 paf 703: if(
1.129 paf 704: file.length>=sizeof(Data_string_serialized_prolog)
1.135 paf 705: && prolog.version==DATA_STRING_SERIALIZED_VERSION) {
706: if(body->deserialize(sizeof(Data_string_serialized_prolog), file.str, file.length)) {
707: result.body=body;
708: result.expired=prolog.expires <= now;
709: }
710: }
1.72 paf 711: }
1.63 paf 712:
1.135 paf 713: return result;
1.63 paf 714: }
1.129 paf 715: static time_t as_expires(Request& r, MethodParams& params,
1.79 paf 716: int index, time_t now) {
717: time_t result;
1.197 misha 718: if(Value* vdate=params[index].as(VDATE_TYPE))
1.220 moko 719: result=(time_t)(static_cast<VDate*>(vdate)->get_time());
1.79 paf 720: else
1.129 paf 721: result=now+(time_t)params.as_double(index, "lifespan must be date or number", r);
1.79 paf 722:
723: return result;
724: }
1.229 moko 725:
1.129 paf 726: static const String& as_file_spec(Request& r, MethodParams& params, int index) {
727: return r.absolute(params.as_string(index, "filespec must be string"));
1.79 paf 728: }
1.229 moko 729:
1.129 paf 730: static void _cache(Request& r, MethodParams& params) {
1.173 misha 731: if(params.count()==0) {
732: // ^cache[] -- return current expiration time
1.158 paf 733: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
734: if(!scope)
1.221 moko 735: throw Exception(PARSER_RUNTIME, 0, "expire-time get without cache");
736: r.write_no_lang(*new VDate((pa_time_t)scope->expires));
1.158 paf 737: return;
738: }
739:
1.79 paf 740: time_t now=time(0);
741:
1.129 paf 742: if(params.count()==1) {
1.173 misha 743: // ^cache[filename] ^cache(seconds) ^cache[expires date]
1.129 paf 744: if(params[0].is_string()) { // filename?
1.79 paf 745: cache_delete(as_file_spec(r, params, 0));
746: return;
747: }
748:
749: // secods|expires date
1.135 paf 750: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
751: if(!scope)
1.166 misha 752: throw Exception(PARSER_RUNTIME,
1.129 paf 753: 0,
1.79 paf 754: "expire-time reducing instruction without cache");
755:
1.129 paf 756: time_t expires=as_expires(r, params, 0, now);
1.135 paf 757: if(expires < scope->expires)
758: scope->expires=expires;
1.79 paf 759:
760: return;
1.149 paf 761: } else if(params.count()<3)
1.166 misha 762: throw Exception(PARSER_RUNTIME,
1.149 paf 763: 0,
764: "invalid number of parameters");
1.63 paf 765:
766: // file_spec, expires, body code
1.172 misha 767: const String& file_spec=as_file_spec(r, params, 0);
1.65 paf 768:
1.141 paf 769: Cache_scope scope={as_expires(r, params, 1, now), 0};
1.135 paf 770:
1.215 moko 771: Temp_hash_value<HashString<void*>, void*> cache_scope_setter(&r.classes_conf, cache_data_name, &scope);
1.136 paf 772: Value& body_code=params.as_junction(2, "body_code must be code");
773: Value* catch_code=0;
774: if(params.count()>3)
775: catch_code=¶ms.as_junction(3, "catch_code must be code");
1.63 paf 776:
1.168 misha 777: if(scope.expires>now) {
778: Cache_get_result cached=cache_get(r.charsets, file_spec, now);
1.69 paf 779:
1.168 misha 780: if(cached.body) { // have cached copy
1.174 misha 781: if(cached.expired) {
782: scope.body_from_disk=cached.body; // storing for user to retrive it with ^cache[]
783: } else {
784: // and it's not expired yet write it out
1.168 misha 785: r.write_assign_lang(*cached.body);
786: // happy with it
787: return;
788: }
789: }
790:
791: // no cached info or it's already expired
1.173 misha 792:
793: // trying to process it under lock and store result in file
1.174 misha 794: const String* processed_body=locked_process_and_cache_put(r, body_code, catch_code, scope, file_spec);
1.173 misha 795: if(processed_body){
1.174 misha 796: // write it out
797: r.write_assign_lang(*processed_body);
798: // happy with it
799: return;
1.173 misha 800: } else {
801: // we fail while get exclusive lock. nvm, we just execute body_code a bit later
1.174 misha 802: }
1.69 paf 803: } else {
1.79 paf 804: // instructed not to cache; forget cached copy
1.68 paf 805: cache_delete(file_spec);
1.69 paf 806: }
1.168 misha 807:
1.222 moko 808: // process without caching
809: if(catch_code){
810: Try_catch_result result=try_catch(r, process_try_body_code, &body_code, catch_code);
811: r.write_assign_lang(result.processed_code);
812: } else {
1.234 moko 813: r.write_assign_lang(r.process_to_string(body_code));
1.222 moko 814: }
1.63 paf 815: }
816:
1.129 paf 817: static void _try_operator(Request& r, MethodParams& params) {
818: Value& body_code=params.as_junction(0, "body_code must be code");
819: Value& catch_code=params.as_junction(1, "catch_code must be code");
1.179 misha 820: Value* finally_code=(params.count()==3) ? ¶ms.as_junction(2, "finally_code must be code") : 0;
821:
822: Try_catch_result result;
1.229 moko 823:
1.179 misha 824: try{
1.229 moko 825: // process try and catch code
1.222 moko 826: result=try_catch(r, process_try_body_code, &body_code, &catch_code);
1.179 misha 827: } catch(...){
1.229 moko 828: // process finally code but ignore the result
829: if(finally_code){
830: Temp_skip temp(r);
1.234 moko 831: Value &finally_result=r.process(*finally_code);
1.229 moko 832: }
1.179 misha 833: rethrow;
834: }
1.74 paf 835:
1.229 moko 836: // process finally code
837: if(finally_code){
838: Temp_skip temp(r);
1.234 moko 839: Value& finally_result=r.process(*finally_code);
1.229 moko 840:
1.234 moko 841: // no exception in try/catch or finally, writing processed body_code or catch_code
842: r.write_pass_lang(result.processed_code);
1.123 paf 843:
1.234 moko 844: // write out processed finally code
845: r.write_pass_lang(finally_result);
846: } else {
847: // no exception in try/catch, writing processed body_code or catch_code
848: r.write_pass_lang(result.processed_code);
849: }
1.179 misha 850:
1.74 paf 851: }
852:
1.138 paf 853: static void _throw_operator(Request&, MethodParams& params) {
1.178 misha 854: if(params.count()==1 && !params[0].is_string()) {
1.129 paf 855: if(HashStringValue *hash=params[0].get_hash()) {
856: const char* type=0;
857: if(Value* value=hash->get(exception_type_part_name))
1.78 paf 858: type=value->as_string().cstr();
1.129 paf 859: const String* source=0;
860: if(Value* value=hash->get(exception_source_part_name))
1.74 paf 861: source=&value->as_string();
1.138 paf 862: const char* comment=0;
1.129 paf 863: if(Value* value=hash->get(exception_comment_part_name))
1.74 paf 864: comment=value->as_string().cstr();
865:
1.78 paf 866: throw Exception(type,
1.129 paf 867: source?source:0,
868: "%s", comment?comment:"");
1.74 paf 869: } else
1.166 misha 870: throw Exception(PARSER_RUNTIME,
1.129 paf 871: 0,
1.178 misha 872: "one-param version has hash or string param");
1.74 paf 873: } else {
1.129 paf 874: const char* type=params.as_string(0, "type must be string").cstr();
1.178 misha 875: const String* source=params.count()>1? ¶ms.as_string(1, "source must be string"):0;
876: const char* comment=params.count()>2? params.as_string(2, "comment must be string").cstr():0;
877: throw Exception(type, source, "%s", comment?comment:"");
1.74 paf 878: }
1.132 paf 879: }
1.129 paf 880:
1.150 paf 881: static void _sleep_operator(Request& r, MethodParams& params) {
882: double seconds=params.as_double(0, "seconds must be double", r);
1.206 moko 883: if(seconds>0)
884: pa_sleep((int)trunc(seconds), (int)trunc((seconds-trunc(seconds))*1000000));
1.150 paf 885: }
886:
1.129 paf 887: #if defined(WIN32) && defined(_DEBUG)
888: # define PA_BPT
1.138 paf 889: static void _bpt(Request&, MethodParams&) {
1.129 paf 890: _asm int 3;
891: }
892: #endif
893:
1.10 paf 894: // constructor
895:
1.226 moko 896: VClassMAIN::VClassMAIN(): VClass(MAIN_CLASS_NAME) {
1.129 paf 897:
898: #ifdef PA_BPT
899: // ^bpt[]
900: add_native_method("bpt", Method::CT_ANY, _bpt, 0, 0);
901: #endif
1.121 paf 902:
1.1 paf 903: // ^if(condition){code-when-true}
904: // ^if(condition){code-when-true}{code-when-false}
1.200 moko 905: // ^if(condition){code-when-true} (another condition){code-when-true} ... {code-when-false}
906: add_native_method("if", Method::CT_ANY, _if, 2, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 907:
1.194 misha 908: // ^untaint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
909: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 910:
1.194 misha 911: // ^taint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
912: add_native_method("taint", Method::CT_ANY, _taint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 913:
1.205 moko 914: // ^apply-taint[untaint lang][string]
915: add_native_method("apply-taint", Method::CT_ANY, _apply_taint, 1, 2, Method::CO_WITHOUT_FRAME);
916:
1.216 moko 917: // ^process{code}
918: // ^process[context]{code}[options hash]
1.146 paf 919: add_native_method("process", Method::CT_ANY, _process, 1, 3);
1.1 paf 920:
921: // ^rem{code}
1.185 misha 922: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 923:
924: // ^while(condition){code}
1.185 misha 925: add_native_method("while", Method::CT_ANY, _while, 2, 3, Method::CO_WITHOUT_FRAME);
1.1 paf 926:
1.216 moko 927: // ^use[file[;options hash]]
928: add_native_method("use", Method::CT_ANY, _use, 1, 2);
1.1 paf 929:
1.164 paf 930: // ^break[]
1.227 moko 931: // ^break(condition)
932: add_native_method("break", Method::CT_ANY, _break, 0, 1, Method::CO_WITHOUT_FRAME);
1.185 misha 933:
1.164 paf 934: // ^continue[]
1.227 moko 935: // ^continue(condition)
936: add_native_method("continue", Method::CT_ANY, _continue, 0, 1, Method::CO_WITHOUT_FRAME);
1.185 misha 937:
1.54 paf 938: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.185 misha 939: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1, Method::CO_WITHOUT_WCONTEXT);
1.1 paf 940:
941: // ^eval(expr)
942: // ^eval(expr)[format]
1.185 misha 943: add_native_method("eval", Method::CT_ANY, _eval, 1, 2, Method::CO_WITHOUT_FRAME);
1.52 parser 944:
1.1 paf 945: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 946: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
947:
1.63 paf 948:
1.136 paf 949: // ^cache[file_spec](time){code}[{catch code}] time=0 no cache
1.65 paf 950: // ^cache[file_spec] delete cache
1.161 paf 951: // ^cache[] get current expiration time
952: add_native_method("cache", Method::CT_ANY, _cache, 0, 4);
1.63 paf 953:
1.28 parser 954: // switch
955:
956: // ^switch[value]{cases}
1.185 misha 957: add_native_method("switch", Method::CT_ANY, _switch, 2, 2, Method::CO_WITHOUT_FRAME);
1.28 parser 958:
959: // ^case[value]{code}
1.185 misha 960: add_native_method("case", Method::CT_ANY, _case, 2, 10000, Method::CO_WITHOUT_FRAME);
1.74 paf 961:
962: // try-catch
963:
964: // ^try{code}{catch code}
1.185 misha 965: add_native_method("try", Method::CT_ANY, _try_operator, 2, 3, Method::CO_WITHOUT_FRAME);
1.74 paf 966: // ^throw[$exception hash]
967: // ^throw[type;source;comment]
968: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
969:
1.150 paf 970: add_native_method("sleep", Method::CT_ANY, _sleep_operator, 1, 1);
1.10 paf 971: }
1.11 paf 972:
973: // constructor & configurator
1.1 paf 974:
1.129 paf 975: VStateless_class& VClassMAIN_create() {
976: return *new VClassMAIN;
1.1 paf 977: }
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