Annotation of parser3/src/classes/op.C, revision 1.217
1.1 paf 1: /** @file
1.9 paf 2: Parser: parser @b operators.
1.1 paf 3:
1.209 moko 4: Copyright (c) 2001-2012 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:
1.217 ! moko 21: volatile const char * IDENT_OP_C="$Id: op.C,v 1.216 2013/09/30 19:40:57 moko Exp $";
1.209 moko 22:
1.18 parser 23: // limits
24:
1.162 paf 25: #define MAX_LOOPS 20000
1.18 parser 26:
1.10 paf 27: // defines
28:
1.82 paf 29: #define CASE_DEFAULT_VALUE "DEFAULT"
1.11 paf 30:
1.10 paf 31: // class
32:
1.113 paf 33: class VClassMAIN: public VClass {
1.10 paf 34: public:
1.129 paf 35: VClassMAIN();
1.10 paf 36: };
37:
1.129 paf 38: // defines for statics
39:
40: #define SWITCH_DATA_NAME "SWITCH-DATA"
41: #define CACHE_DATA_NAME "CACHE-DATA"
1.164 paf 42:
1.129 paf 43: #define EXCEPTION_VAR_NAME "exception"
44:
45: // statics
46:
47: //^switch ^case
48: static const String switch_data_name(SWITCH_DATA_NAME);
49: //^cache
50: static const String cache_data_name(CACHE_DATA_NAME);
51:
52: static const String exception_var_name(EXCEPTION_VAR_NAME);
53:
1.164 paf 54:
1.136 paf 55: // local defines
56:
57: #define CACHE_EXCEPTION_HANDLED_CACHE_NAME "cache"
58:
1.129 paf 59: // helpers
60:
1.187 misha 61: class Untaint_lang_name2enum: public HashString<String::Language> {
1.129 paf 62: public:
63: Untaint_lang_name2enum() {
64: #define ULN(name, LANG) \
1.130 paf 65: put(String::Body(name), (value_type)(String::L_##LANG));
1.198 misha 66: ULN("clean", CLEAN);
1.129 paf 67: ULN("as-is", AS_IS);
68: ULN("optimized-as-is", AS_IS|String::L_OPTIMIZE_BIT);
69: ULN("file-spec", FILE_SPEC);
70: ULN("http-header", HTTP_HEADER);
71: ULN("mail-header", MAIL_HEADER);
72: ULN("uri", URI);
73: ULN("sql", SQL);
74: ULN("js", JS);
75: ULN("xml", XML);
76: ULN("optimized-xml", XML|String::L_OPTIMIZE_BIT);
77: ULN("html", HTML);
78: ULN("optimized-html", HTML|String::L_OPTIMIZE_BIT);
1.159 paf 79: ULN("regex", REGEX);
1.193 misha 80: ULN("parser-code", PARSER_CODE);
1.204 misha 81: ULN("json", JSON);
1.129 paf 82: #undef ULN
83: }
84: } untaint_lang_name2enum;
85:
1.10 paf 86: // methods
87:
1.129 paf 88: static void _if(Request& r, MethodParams& params) {
1.200 moko 89: size_t max_param=params.count()-1;
90: size_t i=0;
91: do {
92: bool condition=params.as_bool(i, "condition must be expression", r);
93: if(condition) {
94: r.process_write(*params.get(i+1));
95: return;
96: }
97: i+=2;
98: } while (i < max_param);
99:
100: if(i == max_param)
101: r.process_write(*params.get(i));
1.1 paf 102: }
103:
1.210 moko 104: String::Language get_untaint_lang(const String& lang_name){
1.175 misha 105: String::Language lang=untaint_lang_name2enum.get(lang_name);
106: if(!lang)
1.210 moko 107: throw Exception(PARSER_RUNTIME, &lang_name, "invalid taint language");
1.175 misha 108: return lang;
109: }
110:
1.129 paf 111: static void _untaint(Request& r, MethodParams& params) {
112: String::Language lang;
113: if(params.count()==1)
1.175 misha 114: lang=String::L_AS_IS; // mark as simply 'as-is'. useful in html from sql
115: else
1.210 moko 116: lang=get_untaint_lang(params.as_string(0, "lang must be string"));
1.1 paf 117:
118: {
1.129 paf 119: Value& vbody=params.as_junction(params.count()-1, "body must be code");
1.1 paf 120:
1.191 misha 121: Temp_lang temp_lang(r, lang); // set temporarily specified ^untaint[language;
122: StringOrValue result=r.process(vbody); // process marking tainted with that lang
1.188 misha 123: r.write_assign_lang(result);
1.1 paf 124: }
125: }
126:
1.129 paf 127: static void _taint(Request& r, MethodParams& params) {
128: String::Language lang;
129: if(params.count()==1)
1.175 misha 130: lang=String::L_TAINTED; // mark as simply 'tainted'. useful in table:create
131: else
1.210 moko 132: lang=get_untaint_lang(params.as_string(0, "lang must be string"));
1.1 paf 133:
134: {
1.129 paf 135: Value& vbody=params.as_no_junction(params.count()-1, "body must not be code");
1.1 paf 136:
1.191 misha 137: String result(vbody.as_string(), lang); // force result language to specified
1.188 misha 138: r.write_assign_lang(result);
1.1 paf 139: }
140: }
141:
1.205 moko 142: static void _apply_taint(Request& r, MethodParams& params) {
1.210 moko 143: String::Language lang=params.count()==1 ? String::L_AS_IS : get_untaint_lang(params.as_string(0, "lang must be string"));
1.205 moko 144: const String &sbody=params.as_string(params.count()-1, "body must be string");
1.213 moko 145: String::Body result_body=sbody.cstr_to_string_body_untaint(lang, r.connection(false), &r.charsets);
1.205 moko 146: r.write_pass_lang(*new String(result_body, String::L_AS_IS));
147: }
148:
1.129 paf 149: static void _process(Request& r, MethodParams& params) {
150: Method* main_method;
151:
152: size_t index=0;
153: Value* target_self;
154: Value& maybe_target_self=params[index];
155: if(maybe_target_self.get_string() || maybe_target_self.get_junction())
156: target_self=&r.get_method_frame()->caller()->self();
157: else {
158: target_self=&maybe_target_self; index++;
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)
1.166 misha 164: throw Exception(PARSER_RUNTIME,
1.129 paf 165: 0,
1.116 paf 166: "no target class");
1.114 paf 167:
1.73 paf 168: // temporary remove language change
1.192 misha 169: Temp_lang temp_lang(r, String::L_PARSER_CODE);
1.1 paf 170: // temporary zero @main so to maybe-replace it in processed code
1.129 paf 171: Temp_method temp_method_main(*target_class, main_method_name, 0);
1.1 paf 172: // temporary zero @auto so it wouldn't be auto-called in Request::use_buf
1.129 paf 173: Temp_method temp_method_auto(*target_class, auto_method_name, 0);
174:
175: const String* main_alias=0;
1.146 paf 176: const String* file_alias=0;
177: int line_no_alias_offset=0;
1.216 moko 178: bool allow_class_replace=false;
1.211 misha 179:
180: size_t options_index=index+1;
181: if(options_index<params.count())
182: if(HashStringValue* options=params.as_hash(options_index)) {
1.216 moko 183:
1.211 misha 184: int valid_options=0;
1.216 moko 185: for(HashStringValue::Iterator i(*options); i; i.next() ){
186:
187: String::Body key=i.key();
188: Value* value=i.value();
189:
190: if(key == "main") {
191: valid_options++;
192: main_alias=&value->as_string();
193: } else if(key == "file") {
194: valid_options++;
195: file_alias=&value->as_string();
196: } else if(key == "lineno") {
197: valid_options++;
198: line_no_alias_offset=value->as_int();
199: } else if(key == "replace") {
200: valid_options++;
201: allow_class_replace=r.process_to_value(*value).as_bool();
202: }
1.211 misha 203: }
1.216 moko 204:
1.211 misha 205: if(valid_options!=options->count())
206: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
1.146 paf 207: }
1.129 paf 208:
1.146 paf 209: uint processe_file_no=file_alias?
210: r.register_file(r.absolute(*file_alias))
211: : pseudo_file_no__process;
212: // process...{string}
213: Value& vjunction=params.as_junction(index, "body must be code");
214: // evaluate source to process
215: const String& source=r.process_to_string(vjunction);
1.216 moko 216:
217: Temp_class_replace class_replace(r, allow_class_replace);
218:
1.146 paf 219: r.use_buf(*target_class,
1.190 misha 220: source.untaint_cstr(String::L_AS_IS, r.connection(false)),
1.146 paf 221: main_alias,
222: processe_file_no,
223: line_no_alias_offset);
1.1 paf 224:
1.73 paf 225: // main_method
1.129 paf 226: main_method=target_class->get_method(main_method_name);
1.73 paf 227: }
228: // after restoring current-request-lang
229: // maybe-execute @main[]
230: if(main_method) {
1.202 moko 231: VMethodFrame frame(*main_method, r.get_method_frame()->caller(), *target_self);
232: frame.empty_params();
1.203 moko 233: r.op_call(frame);
234: r.write_pass_lang(frame.result());
1.1 paf 235: }
236: }
237:
1.138 paf 238: static void _rem(Request&, MethodParams& params) {
1.129 paf 239: params.as_junction(0, "body must be code");
1.1 paf 240: }
241:
1.129 paf 242: static void _while(Request& r, MethodParams& params) {
1.196 misha 243: InCycle temp(r);
1.164 paf 244:
1.170 misha 245: Value& vcondition=params.as_expression(0, "condition must be number, bool or expression");
246:
1.162 paf 247: Value& body_code=params.as_junction(1, "body must be code");
248: Value* delim_maybe_code=params.count()>2?¶ms[2]:0;
1.1 paf 249:
250: // while...
251: int endless_loop_count=0;
1.186 misha 252: if(delim_maybe_code){ // delimiter set
1.185 misha 253: bool need_delim=false;
254: while(true) {
255: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
256: throw Exception(PARSER_RUNTIME,
257: 0,
258: "endless loop detected");
259:
260: if(!r.process_to_value(vcondition, false/*don't intercept string*/).as_bool())
261: break;
1.1 paf 262:
1.185 misha 263: StringOrValue sv_processed=r.process(body_code);
264: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 misha 265:
1.185 misha 266: const String* s_processed=sv_processed.get_string();
1.186 misha 267: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 268: if(need_delim) // need delim & iteration produced string?
269: r.write_pass_lang(r.process(*delim_maybe_code));
270: else
271: need_delim=true;
272: }
273: r.write_pass_lang(sv_processed);
1.1 paf 274:
1.185 misha 275: if(lskip==Request::SKIP_BREAK)
276: break;
1.162 paf 277: }
1.185 misha 278: } else {
279: while(true) {
280: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
281: throw Exception(PARSER_RUNTIME,
282: 0,
283: "endless loop detected");
284:
285: if(!r.process_to_value(vcondition, false/*don't intercept string*/).as_bool())
286: break;
1.164 paf 287:
1.185 misha 288: r.process_write(body_code);
289: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
290:
291: if(lskip==Request::SKIP_BREAK)
292: break;
293: }
1.1 paf 294: }
295: }
296:
1.129 paf 297: static void _use(Request& r, MethodParams& params) {
1.171 misha 298: Value& vfile=params.as_no_junction(0, FILE_NAME_MUST_NOT_BE_CODE);
1.199 misha 299:
1.216 moko 300: bool allow_class_replace=false;
301:
302: if(params.count()==2)
303: if(HashStringValue* options=params.as_hash(1)) {
304: int valid_options=0;
305: for(HashStringValue::Iterator i(*options); i; i.next() ){
306:
307: String::Body key=i.key();
308: Value* value=i.value();
309:
310: if(key == "replace") {
311: valid_options++;
312: allow_class_replace=r.process_to_value(*value).as_bool();
313: }
314:
315: if(valid_options!=options->count())
316: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
317: }
318: }
319:
320: Temp_class_replace class_replace(r, allow_class_replace);
321:
1.199 misha 322: // _use could be called from the parser3 method only, so caller is always defined
1.202 moko 323: r.use_file(r.main_class, vfile.as_string(), r.get_method_filename(&r.get_method_frame()->caller()->method));
1.1 paf 324: }
325:
1.164 paf 326: static void set_skip(Request& r, Request::Skip askip) {
1.196 misha 327: if(!r.get_in_cycle())
1.208 misha 328: throw Exception(askip==Request::SKIP_BREAK?"parser.break":"parser.continue",
1.164 paf 329: 0,
330: "without cycle");
331:
332: r.set_skip(askip);
333: }
334:
335: static void _break(Request& r, MethodParams&) {
336: set_skip(r, Request::SKIP_BREAK);
337: }
338:
339: static void _continue(Request& r, MethodParams&) {
340: set_skip(r, Request::SKIP_CONTINUE);
341: }
342:
1.129 paf 343: static void _for(Request& r, MethodParams& params) {
1.196 misha 344: InCycle temp(r);
1.164 paf 345:
1.129 paf 346: const String& var_name=params.as_string(0, "var name must be string");
347: int from=params.as_int(1, "from must be int", r);
348: int to=params.as_int(2, "to must be int", r);
1.186 misha 349: Value& body_code=params.as_junction(3, "body must be code");
1.129 paf 350: Value* delim_maybe_code=params.count()>4?¶ms[4]:0;
1.1 paf 351:
1.57 paf 352: if(to-from>=MAX_LOOPS) // too long loop?
1.166 misha 353: throw Exception(PARSER_RUNTIME,
1.129 paf 354: 0,
1.57 paf 355: "endless loop detected");
356:
1.129 paf 357: VInt* vint=new VInt(0);
1.154 paf 358:
359: VMethodFrame& caller=*r.get_method_frame()->caller();
1.217 ! moko 360: caller.put_element(var_name, vint);
1.186 misha 361: if(delim_maybe_code){ // delimiter set
1.185 misha 362: bool need_delim=false;
363:
364: for(int i=from; i<=to; i++) {
365: vint->set_int(i);
366:
367: StringOrValue sv_processed=r.process(body_code);
368: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 misha 369:
1.185 misha 370: const String* s_processed=sv_processed.get_string();
1.186 misha 371: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 372: if(need_delim) // need delim & iteration produced string?
373: r.write_pass_lang(r.process(*delim_maybe_code));
374: else
375: need_delim=true;
376: }
377: r.write_pass_lang(sv_processed);
1.1 paf 378:
1.185 misha 379: if(lskip==Request::SKIP_BREAK)
380: break;
1.1 paf 381: }
1.185 misha 382: } else {
383: for(int i=from; i<=to; i++) {
384: vint->set_int(i);
385:
386: r.process_write(body_code);
387: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.164 paf 388:
1.185 misha 389: if(lskip==Request::SKIP_BREAK)
390: break;
391: }
1.1 paf 392: }
393: }
394:
1.129 paf 395: static void _eval(Request& r, MethodParams& params) {
396: Value& expr=params.as_junction(0, "need expression");
1.1 paf 397: // evaluate expresion
1.129 paf 398: Value& value_result=r.process_to_value(expr,
1.165 misha 399: false/*don't intercept string*/).as_expr_result();
1.129 paf 400: if(params.count()>1) {
1.177 misha 401: const String& fmt=params.as_string(1, "fmt must be string").trim();
402: if(fmt.is_empty()){
403: r.write_no_lang(value_result);
404: } else {
405: r.write_no_lang(String(format(value_result.as_double(), fmt.cstrm())));
406: }
1.91 paf 407: } else
1.129 paf 408: r.write_no_lang(value_result);
1.1 paf 409: }
410:
1.129 paf 411: static void _connect(Request& r, MethodParams& params) {
412: Value& url=params.as_no_junction(0, "url must not be code");
413: Value& body_code=params.as_junction(1, "body must be code");
1.1 paf 414:
1.129 paf 415: Table* protocol2driver_and_client=0;
1.197 misha 416: if(Value* sql=r.main_class.get_element(String(MAIN_SQL_NAME))) {
417: if(Value* element=sql->get_element(String(MAIN_SQL_DRIVERS_NAME))) {
1.113 paf 418: protocol2driver_and_client=element->get_table();
419: }
420: }
1.11 paf 421:
1.1 paf 422: // connect
1.142 paf 423: SQL_Connection* connection=SQL_driver_manager->get_connection(url.as_string(),
1.144 paf 424: protocol2driver_and_client,
1.180 misha 425: r.charsets.source().NAME().cstr(),
426: r.request_info.document_root);
1.1 paf 427:
1.214 moko 428: Temp_connection temp_connection(r, connection);
1.63 paf 429:
1.1 paf 430: // execute body
1.53 parser 431: try {
1.189 misha 432: r.process_write(body_code);
1.129 paf 433: connection->commit();
434: connection->close();
1.75 paf 435: } catch(...) { // process problem
1.129 paf 436: connection->rollback();
437: connection->close();
438: rethrow;
1.1 paf 439: }
440: }
441:
1.41 parser 442: #ifndef DOXYGEN
1.129 paf 443: class Switch_data: public PA_Object {
444: public:
445: Request& r;
1.181 misha 446: const String* searching_string;
447: double searching_double;
1.207 misha 448: bool searching_bool;
1.129 paf 449: Value* found;
450: Value* _default;
451: public:
452: Switch_data(Request& ar, Value& asearching):
1.181 misha 453: r(ar)
454: {
455: if(asearching.is_string() || asearching.is_void()){
456: searching_string=&asearching.as_string();
457: searching_double=0;
1.207 misha 458: searching_bool=false;
1.181 misha 459: } else {
460: searching_string=0;
461: searching_double=asearching.as_double();
1.207 misha 462: searching_bool=asearching.is_bool();
1.181 misha 463: }
464: }
1.28 parser 465: };
1.41 parser 466: #endif
1.129 paf 467: static void _switch(Request& r, MethodParams& params) {
468: Switch_data* data=new Switch_data(r, r.process_to_value(params[0]));
1.215 moko 469: Temp_hash_value<HashString<void*>, void*> switch_data_setter(&r.classes_conf, switch_data_name, data);
1.28 parser 470:
1.129 paf 471: Value& cases_code=params.as_junction(1, "switch cases must be code");
1.82 paf 472: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
473: // because of stacked WWrapper used there as wcontext
1.84 paf 474: r.process(cases_code, true/*intercept_string*/);
1.147 paf 475: if(Value* selected_code=data->found? data->found: data->_default)
1.107 paf 476: r.write_pass_lang(r.process(*selected_code));
1.28 parser 477: }
478:
1.129 paf 479: static void _case(Request& r, MethodParams& params) {
480: Switch_data* data=static_cast<Switch_data*>(r.classes_conf.get(switch_data_name));
1.38 parser 481: if(!data)
1.166 misha 482: throw Exception(PARSER_RUNTIME,
1.129 paf 483: 0,
1.38 parser 484: "without switch");
1.28 parser 485:
1.181 misha 486: if(data->found) // matches already was found
487: return;
488:
1.129 paf 489: int count=params.count();
1.184 misha 490: Value* code=¶ms.as_expression(--count, "case result must be code");
491:
492: #ifdef USE_DESTRUCTORS
493: Junction *j=code->get_junction();
494: if (j){
495: code=new VJunction(j->self,j->method,j->method_frame,j->rcontext,j->wcontext,j->code);
496: if (j->wcontext) j->wcontext->attach_junction((VJunction *)code);
497: }
498: #endif
1.83 paf 499:
1.181 misha 500: for(int i=0; i<count; i++){
1.129 paf 501: Value& value=r.process_to_value(params[i]);
1.28 parser 502:
1.181 misha 503: if(value.is_string() && value.as_string() == CASE_DEFAULT_VALUE){
1.184 misha 504: data->_default=code;
1.181 misha 505: continue;
1.28 parser 506: }
507:
508: bool matches;
1.181 misha 509: if(data->searching_string)
510: matches=(*data->searching_string) == value.as_string();
1.207 misha 511: else if(data->searching_bool || value.is_bool())
512: matches=(data->searching_double != 0) == value.as_bool();
1.28 parser 513: else
1.181 misha 514: matches=data->searching_double == value.as_double();
1.82 paf 515:
1.181 misha 516: if(matches){
1.184 misha 517: data->found=code;
1.28 parser 518: break;
519: }
520: }
521: }
1.136 paf 522: #ifndef DOXYGEN
523: struct Try_catch_result {
524: StringOrValue processed_code;
525: const String* exception_should_be_handled;
526:
527: Try_catch_result(): exception_should_be_handled(0) {}
528: };
529: #endif
530:
531: /// used by ^try and ^cache, @returns $exception.handled[string] if any
532: template<class I>
533: static Try_catch_result try_catch(Request& r,
534: StringOrValue body_code(Request&, I), I info,
1.179 misha 535: Value* catch_code,
536: bool could_be_handled_by_caller=false)
1.136 paf 537: {
538: Try_catch_result result;
1.179 misha 539:
1.136 paf 540: if(!catch_code) {
541: result.processed_code=body_code(r, info);
542: return result;
543: }
544:
545: // taking snapshot of try-context
546: Request_context_saver try_context(r);
547: try {
548: result.processed_code=body_code(r, info);
549: } catch(const Exception& e) {
550: Request_context_saver throw_context(r); // taking snapshot of throw-context [stack trace contains error]
551: Request::Exception_details details=r.get_details(e);
552: try_context.restore(); // restoring try-context to perform catch-code
553:
554: Junction* junction=catch_code->get_junction();
555: Value* method_frame=junction->method_frame;
1.197 misha 556: Value* saved_exception_var_value=method_frame->get_element(exception_var_name);
1.154 paf 557: VMethodFrame& frame=*junction->method_frame;
1.217 ! moko 558: frame.put_element(exception_var_name, &details.vhash);
1.179 misha 559:
1.136 paf 560: result.processed_code=r.process(*catch_code);
561:
562: // retriving $exception.handled, restoring $exception var
563: Value* vhandled=details.vhash.hash().get(exception_handled_part_name);
1.217 ! moko 564: frame.put_element(exception_var_name, saved_exception_var_value);
1.136 paf 565:
566: bool bhandled=false;
567: if(vhandled) {
568: if(vhandled->is_string()) { // not simple $exception.handled(1/0)?
1.160 paf 569: if(could_be_handled_by_caller) { // and we can possibly handle it
570: result.exception_should_be_handled=vhandled->get_string(); // considering 'recovered' and let the caller recover
571: return result;
572: }
573:
574: bhandled=false;
575: } else
1.179 misha 576: bhandled=vhandled->as_bool();
1.136 paf 577: }
578:
579: if(!bhandled) {
580: throw_context.restore(); // restoring throw-context [exception were not handled]
581: rethrow;
582: }
583: }
1.179 misha 584:
1.136 paf 585: return result;
586: }
1.28 parser 587:
1.63 paf 588: // cache--
589:
590: // consts
591:
1.152 paf 592: const int DATA_STRING_SERIALIZED_VERSION=0x0006;
1.63 paf 593:
594: // helper types
595:
596: #ifndef DOXYGEN
597: struct Data_string_serialized_prolog {
598: int version;
1.79 paf 599: time_t expires;
1.63 paf 600: };
601: #endif
602:
1.68 paf 603: void cache_delete(const String& file_spec) {
1.167 misha 604: file_delete(file_spec, false/*fail_on_problem*/);
1.63 paf 605: }
1.69 paf 606:
607: #ifndef DOXYGEN
1.135 paf 608: struct Cache_scope {
1.129 paf 609: public:
1.79 paf 610: time_t expires;
1.135 paf 611: const String* body_from_disk;
1.79 paf 612: };
1.69 paf 613: struct Locked_process_and_cache_put_action_info {
614: Request *r;
1.136 paf 615: Cache_scope *scope;
1.167 misha 616: Value* body_code;
617: Value* catch_code;
1.136 paf 618: const String* processed_code;
1.69 paf 619: };
620: #endif
1.136 paf 621:
622:
623:
624: static StringOrValue process_cache_body_code(Request& r, Value* body_code) {
1.153 paf 625: return StringOrValue(r.process_to_string(*body_code));
1.136 paf 626: }
627:
1.129 paf 628: /* @todo maybe network order worth spending some effort?
629: don't bothering myself with network byte order,
630: am not planning to be able to move resulting file across platforms
631: */
1.69 paf 632: static void locked_process_and_cache_put_action(int f, void *context) {
633: Locked_process_and_cache_put_action_info& info=
634: *static_cast<Locked_process_and_cache_put_action_info *>(context);
1.129 paf 635:
1.160 paf 636: const String* body_from_disk=info.scope->body_from_disk;
1.69 paf 637: // body->process
1.136 paf 638: Try_catch_result result=try_catch(*info.r,
639: process_cache_body_code, info.body_code,
1.160 paf 640: info.catch_code, body_from_disk!=0 /*we have something old=we can handle=recover later*/);
1.136 paf 641:
642: if(result.exception_should_be_handled) {
643: if(*result.exception_should_be_handled==CACHE_EXCEPTION_HANDLED_CACHE_NAME) {
1.160 paf 644: assert(body_from_disk);
645: info.processed_code=body_from_disk;
1.136 paf 646: } else
1.166 misha 647: throw Exception(PARSER_RUNTIME,
1.136 paf 648: result.exception_should_be_handled,
649: "$"EXCEPTION_VAR_NAME"."EXCEPTION_HANDLED_PART_NAME" value must be "
650: "either boolean or string '"CACHE_EXCEPTION_HANDLED_CACHE_NAME"'");
651: } else
652: info.processed_code=&result.processed_code.as_string();
1.69 paf 653:
1.79 paf 654: // expiration time not spoiled by ^cache(0) or something?
1.136 paf 655: if(info.scope->expires > time(0)) {
1.79 paf 656: // string -serialize> buffer
1.136 paf 657: String::Cm serialized=info.processed_code->serialize(
1.129 paf 658: sizeof(Data_string_serialized_prolog));
1.79 paf 659: Data_string_serialized_prolog& prolog=
1.129 paf 660: *reinterpret_cast<Data_string_serialized_prolog *>(serialized.str);
1.79 paf 661: prolog.version=DATA_STRING_SERIALIZED_VERSION;
1.136 paf 662: prolog.expires=info.scope->expires;
1.79 paf 663:
664: // buffer -write> file
1.129 paf 665: write(f, serialized.str, serialized.length);
1.79 paf 666: } else // expired!
1.136 paf 667: info.scope->expires=0; // flag it so that could be easily checked by caller
1.69 paf 668: }
1.129 paf 669: const String* locked_process_and_cache_put(Request& r,
1.128 paf 670: Value& body_code,
1.136 paf 671: Value* catch_code,
672: Cache_scope& scope,
673: const String& file_spec)
674: {
1.140 paf 675: Locked_process_and_cache_put_action_info info={&r, &scope, &body_code, catch_code, 0};
1.69 paf 676:
1.129 paf 677: const String* result=file_write_action_under_lock(
1.69 paf 678: file_spec,
1.168 misha 679: "cache_put",
680: locked_process_and_cache_put_action,
681: &info,
1.69 paf 682: false/*as_text*/,
683: false/*do_append*/,
1.173 misha 684: false/*block == don't wait till other thread release lock*/,
685: false/*dun throw exception if lock failed*/) ? info.processed_code: 0;
1.168 misha 686:
1.100 paf 687: time_t now=time(0);
1.136 paf 688: if(scope.expires<=now)
1.79 paf 689: cache_delete(file_spec);
690: return result;
1.63 paf 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
698: static Cache_get_result cache_get(Request_charsets& charsets, const String& file_spec, time_t now) {
1.140 paf 699: Cache_get_result result={0, false};
1.135 paf 700:
1.129 paf 701: File_read_result file=file_read(charsets, file_spec,
1.63 paf 702: false/*as_text*/,
1.129 paf 703: 0, //no params
704: false/*fail_on_read_problem*/);
705: if(file.success && file.length/* ignore reads which are empty due to
1.72 paf 706: non-unary open+lockEX conflict with lockSH */) {
1.129 paf 707:
1.72 paf 708: Data_string_serialized_prolog& prolog=
1.129 paf 709: *reinterpret_cast<Data_string_serialized_prolog *>(file.str);
1.63 paf 710:
1.135 paf 711: String* body=new String;
1.72 paf 712: if(
1.129 paf 713: file.length>=sizeof(Data_string_serialized_prolog)
1.135 paf 714: && prolog.version==DATA_STRING_SERIALIZED_VERSION) {
715: if(body->deserialize(sizeof(Data_string_serialized_prolog), file.str, file.length)) {
716: result.body=body;
717: result.expired=prolog.expires <= now;
718: }
719: }
1.72 paf 720: }
1.63 paf 721:
1.135 paf 722: return result;
1.63 paf 723: }
1.129 paf 724: static time_t as_expires(Request& r, MethodParams& params,
1.79 paf 725: int index, time_t now) {
726: time_t result;
1.197 misha 727: if(Value* vdate=params[index].as(VDATE_TYPE))
1.129 paf 728: result=static_cast<VDate*>(vdate)->get_time();
1.79 paf 729: else
1.129 paf 730: result=now+(time_t)params.as_double(index, "lifespan must be date or number", r);
1.79 paf 731:
732: return result;
733: }
1.129 paf 734: static const String& as_file_spec(Request& r, MethodParams& params, int index) {
735: return r.absolute(params.as_string(index, "filespec must be string"));
1.79 paf 736: }
1.129 paf 737: static void _cache(Request& r, MethodParams& params) {
1.173 misha 738: if(params.count()==0) {
739: // ^cache[] -- return current expiration time
1.158 paf 740: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
741: if(!scope)
1.166 misha 742: throw Exception(PARSER_RUNTIME,
1.158 paf 743: 0,
744: "expire-time get without cache");
745: r.write_no_lang(*new VDate(scope->expires));
746: return;
747: }
748:
1.79 paf 749: time_t now=time(0);
750:
1.129 paf 751: if(params.count()==1) {
1.173 misha 752: // ^cache[filename] ^cache(seconds) ^cache[expires date]
1.129 paf 753: if(params[0].is_string()) { // filename?
1.79 paf 754: cache_delete(as_file_spec(r, params, 0));
755: return;
756: }
757:
758: // secods|expires date
1.135 paf 759: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
760: if(!scope)
1.166 misha 761: throw Exception(PARSER_RUNTIME,
1.129 paf 762: 0,
1.79 paf 763: "expire-time reducing instruction without cache");
764:
1.129 paf 765: time_t expires=as_expires(r, params, 0, now);
1.135 paf 766: if(expires < scope->expires)
767: scope->expires=expires;
1.79 paf 768:
769: return;
1.149 paf 770: } else if(params.count()<3)
1.166 misha 771: throw Exception(PARSER_RUNTIME,
1.149 paf 772: 0,
773: "invalid number of parameters");
1.63 paf 774:
775: // file_spec, expires, body code
1.172 misha 776: const String& file_spec=as_file_spec(r, params, 0);
1.65 paf 777:
1.141 paf 778: Cache_scope scope={as_expires(r, params, 1, now), 0};
1.135 paf 779:
1.215 moko 780: Temp_hash_value<HashString<void*>, void*> cache_scope_setter(&r.classes_conf, cache_data_name, &scope);
1.136 paf 781: Value& body_code=params.as_junction(2, "body_code must be code");
782: Value* catch_code=0;
783: if(params.count()>3)
784: catch_code=¶ms.as_junction(3, "catch_code must be code");
1.63 paf 785:
1.168 misha 786: if(scope.expires>now) {
787: Cache_get_result cached=cache_get(r.charsets, file_spec, now);
1.69 paf 788:
1.168 misha 789: if(cached.body) { // have cached copy
1.174 misha 790: if(cached.expired) {
791: scope.body_from_disk=cached.body; // storing for user to retrive it with ^cache[]
792: } else {
793: // and it's not expired yet write it out
1.168 misha 794: r.write_assign_lang(*cached.body);
795: // happy with it
796: return;
797: }
798: }
799:
800: // no cached info or it's already expired
1.173 misha 801:
802: // trying to process it under lock and store result in file
1.174 misha 803: const String* processed_body=locked_process_and_cache_put(r, body_code, catch_code, scope, file_spec);
1.173 misha 804: if(processed_body){
1.174 misha 805: // write it out
806: r.write_assign_lang(*processed_body);
807: // happy with it
808: return;
1.173 misha 809: } else {
810: // we fail while get exclusive lock. nvm, we just execute body_code a bit later
1.174 misha 811: }
1.69 paf 812: } else {
1.79 paf 813: // instructed not to cache; forget cached copy
1.68 paf 814: cache_delete(file_spec);
1.69 paf 815: }
1.168 misha 816:
817: // process without cacheing
818: const String& processed_body=r.process_to_string(body_code);
819: // write it out
820: r.write_assign_lang(processed_body);
1.63 paf 821: }
822:
1.136 paf 823: static StringOrValue process_try_body_code(Request& r, Value* body_code) {
824: return r.process(*body_code);
825: }
1.129 paf 826: static void _try_operator(Request& r, MethodParams& params) {
827: Value& body_code=params.as_junction(0, "body_code must be code");
828: Value& catch_code=params.as_junction(1, "catch_code must be code");
1.179 misha 829: Value* finally_code=(params.count()==3) ? ¶ms.as_junction(2, "finally_code must be code") : 0;
830:
831: Try_catch_result result;
832: StringOrValue finally_result;
833: try{
834: result=try_catch(r,
835: process_try_body_code, &body_code,
836: &catch_code);
837: if(result.exception_should_be_handled)
838: throw Exception(PARSER_RUNTIME,
839: result.exception_should_be_handled,
840: "catch block must set $exception.handled to some boolean value, not string");
841: } catch(...){
842: if(finally_code)
843: finally_result=r.process(*finally_code);
844: rethrow;
845: }
1.74 paf 846:
1.179 misha 847: if(finally_code)
848: finally_result=r.process(*finally_code);
1.123 paf 849:
1.136 paf 850: // write out processed body_code or catch_code
851: r.write_pass_lang(result.processed_code);
1.179 misha 852:
853: // write out processed finally code
854: if(finally_code)
855: r.write_pass_lang(finally_result);
1.74 paf 856: }
857:
1.138 paf 858: static void _throw_operator(Request&, MethodParams& params) {
1.178 misha 859: if(params.count()==1 && !params[0].is_string()) {
1.129 paf 860: if(HashStringValue *hash=params[0].get_hash()) {
861: const char* type=0;
862: if(Value* value=hash->get(exception_type_part_name))
1.78 paf 863: type=value->as_string().cstr();
1.129 paf 864: const String* source=0;
865: if(Value* value=hash->get(exception_source_part_name))
1.74 paf 866: source=&value->as_string();
1.138 paf 867: const char* comment=0;
1.129 paf 868: if(Value* value=hash->get(exception_comment_part_name))
1.74 paf 869: comment=value->as_string().cstr();
870:
1.78 paf 871: throw Exception(type,
1.129 paf 872: source?source:0,
873: "%s", comment?comment:"");
1.74 paf 874: } else
1.166 misha 875: throw Exception(PARSER_RUNTIME,
1.129 paf 876: 0,
1.178 misha 877: "one-param version has hash or string param");
1.74 paf 878: } else {
1.129 paf 879: const char* type=params.as_string(0, "type must be string").cstr();
1.178 misha 880: const String* source=params.count()>1? ¶ms.as_string(1, "source must be string"):0;
881: const char* comment=params.count()>2? params.as_string(2, "comment must be string").cstr():0;
882: throw Exception(type, source, "%s", comment?comment:"");
1.74 paf 883: }
1.132 paf 884: }
1.129 paf 885:
1.150 paf 886: static void _sleep_operator(Request& r, MethodParams& params) {
887: double seconds=params.as_double(0, "seconds must be double", r);
1.206 moko 888: if(seconds>0)
889: pa_sleep((int)trunc(seconds), (int)trunc((seconds-trunc(seconds))*1000000));
1.150 paf 890: }
891:
1.129 paf 892: #if defined(WIN32) && defined(_DEBUG)
893: # define PA_BPT
1.138 paf 894: static void _bpt(Request&, MethodParams&) {
1.129 paf 895: _asm int 3;
896: }
897: #endif
898:
1.10 paf 899: // constructor
900:
1.129 paf 901: VClassMAIN::VClassMAIN(): VClass() {
902: set_name(*new String(MAIN_CLASS_NAME));
903:
904: #ifdef PA_BPT
905: // ^bpt[]
906: add_native_method("bpt", Method::CT_ANY, _bpt, 0, 0);
907: #endif
1.121 paf 908:
1.1 paf 909: // ^if(condition){code-when-true}
910: // ^if(condition){code-when-true}{code-when-false}
1.200 moko 911: // ^if(condition){code-when-true} (another condition){code-when-true} ... {code-when-false}
912: add_native_method("if", Method::CT_ANY, _if, 2, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 913:
1.194 misha 914: // ^untaint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
915: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 916:
1.194 misha 917: // ^taint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
918: add_native_method("taint", Method::CT_ANY, _taint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 919:
1.205 moko 920: // ^apply-taint[untaint lang][string]
921: add_native_method("apply-taint", Method::CT_ANY, _apply_taint, 1, 2, Method::CO_WITHOUT_FRAME);
922:
1.216 moko 923: // ^process{code}
924: // ^process[context]{code}[options hash]
1.146 paf 925: add_native_method("process", Method::CT_ANY, _process, 1, 3);
1.1 paf 926:
927: // ^rem{code}
1.185 misha 928: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 929:
930: // ^while(condition){code}
1.185 misha 931: add_native_method("while", Method::CT_ANY, _while, 2, 3, Method::CO_WITHOUT_FRAME);
1.1 paf 932:
1.216 moko 933: // ^use[file[;options hash]]
934: add_native_method("use", Method::CT_ANY, _use, 1, 2);
1.1 paf 935:
1.164 paf 936: // ^break[]
1.185 misha 937: add_native_method("break", Method::CT_ANY, _break, 0, 0, Method::CO_WITHOUT_FRAME);
938:
1.164 paf 939: // ^continue[]
1.185 misha 940: add_native_method("continue", Method::CT_ANY, _continue, 0, 0, Method::CO_WITHOUT_FRAME);
941:
1.54 paf 942: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.185 misha 943: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1, Method::CO_WITHOUT_WCONTEXT);
1.1 paf 944:
945: // ^eval(expr)
946: // ^eval(expr)[format]
1.185 misha 947: add_native_method("eval", Method::CT_ANY, _eval, 1, 2, Method::CO_WITHOUT_FRAME);
1.52 parser 948:
1.1 paf 949: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 950: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
951:
1.63 paf 952:
1.136 paf 953: // ^cache[file_spec](time){code}[{catch code}] time=0 no cache
1.65 paf 954: // ^cache[file_spec] delete cache
1.161 paf 955: // ^cache[] get current expiration time
956: add_native_method("cache", Method::CT_ANY, _cache, 0, 4);
1.63 paf 957:
1.28 parser 958: // switch
959:
960: // ^switch[value]{cases}
1.185 misha 961: add_native_method("switch", Method::CT_ANY, _switch, 2, 2, Method::CO_WITHOUT_FRAME);
1.28 parser 962:
963: // ^case[value]{code}
1.185 misha 964: add_native_method("case", Method::CT_ANY, _case, 2, 10000, Method::CO_WITHOUT_FRAME);
1.74 paf 965:
966: // try-catch
967:
968: // ^try{code}{catch code}
1.185 misha 969: add_native_method("try", Method::CT_ANY, _try_operator, 2, 3, Method::CO_WITHOUT_FRAME);
1.74 paf 970: // ^throw[$exception hash]
971: // ^throw[type;source;comment]
972: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
973:
1.150 paf 974: add_native_method("sleep", Method::CT_ANY, _sleep_operator, 1, 1);
1.10 paf 975: }
1.11 paf 976:
977: // constructor & configurator
1.1 paf 978:
1.129 paf 979: VStateless_class& VClassMAIN_create() {
980: return *new VClassMAIN;
1.1 paf 981: }
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