Annotation of parser3/src/classes/op.C, revision 1.184
1.1 paf 1: /** @file
1.9 paf 2: Parser: parser @b operators.
1.1 paf 3:
1.184 ! misha 4: Copyright (c) 2001-2009 ArtLebedev Group (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:
1.184 ! misha 8: static const char * const IDENT_OP_C="$Date: 2008-09-04 09:38:53 $";
1.1 paf 9:
1.13 paf 10: #include "classes.h"
1.129 paf 11: #include "pa_vmethod_frame.h"
12:
1.1 paf 13: #include "pa_common.h"
1.134 paf 14: #include "pa_os.h"
1.1 paf 15: #include "pa_request.h"
16: #include "pa_vint.h"
17: #include "pa_sql_connection.h"
1.79 paf 18: #include "pa_vdate.h"
1.105 paf 19: #include "pa_vmethod_frame.h"
1.129 paf 20: #include "pa_vclass.h"
1.144 paf 21: #include "pa_charset.h"
1.1 paf 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"
1.146 paf 30: #define PROCESS_MAIN_OPTION_NAME "main"
31: #define PROCESS_FILE_OPTION_NAME "file"
32: #define PROCESS_LINENO_OPTION_NAME "lineno"
1.11 paf 33:
1.10 paf 34: // class
35:
1.113 paf 36: class VClassMAIN: public VClass {
1.10 paf 37: public:
1.129 paf 38: VClassMAIN();
1.10 paf 39: };
40:
1.164 paf 41: // defines for globals
42:
43: #define CYCLE_DATA_NAME "CYCLE-DATA"
44:
45: // globals
46:
47: //^for & co
48: String cycle_data_name(CYCLE_DATA_NAME);
49:
1.129 paf 50: // defines for statics
51:
52: #define SWITCH_DATA_NAME "SWITCH-DATA"
53: #define CACHE_DATA_NAME "CACHE-DATA"
1.164 paf 54:
1.129 paf 55: #define EXCEPTION_VAR_NAME "exception"
56:
57: // statics
58:
59: //^switch ^case
60: static const String switch_data_name(SWITCH_DATA_NAME);
61: //^cache
62: static const String cache_data_name(CACHE_DATA_NAME);
63:
64: static const String exception_var_name(EXCEPTION_VAR_NAME);
65:
1.164 paf 66:
1.136 paf 67: // local defines
68:
69: #define CACHE_EXCEPTION_HANDLED_CACHE_NAME "cache"
70:
1.129 paf 71: // helpers
72:
1.130 paf 73: class Untaint_lang_name2enum: public Hash<const String::Body, String::Language> {
1.129 paf 74: public:
75: Untaint_lang_name2enum() {
76: #define ULN(name, LANG) \
1.130 paf 77: put(String::Body(name), (value_type)(String::L_##LANG));
1.129 paf 78: ULN("as-is", AS_IS);
79: ULN("optimized-as-is", AS_IS|String::L_OPTIMIZE_BIT);
80: ULN("file-spec", FILE_SPEC);
81: ULN("http-header", HTTP_HEADER);
82: ULN("mail-header", MAIL_HEADER);
83: ULN("uri", URI);
84: ULN("sql", SQL);
85: ULN("js", JS);
86: ULN("xml", XML);
87: ULN("optimized-xml", XML|String::L_OPTIMIZE_BIT);
88: ULN("html", HTML);
89: ULN("optimized-html", HTML|String::L_OPTIMIZE_BIT);
1.159 paf 90: ULN("regex", REGEX);
1.129 paf 91: #undef ULN
92: }
93: } untaint_lang_name2enum;
94:
1.10 paf 95: // methods
96:
1.129 paf 97: static void _if(Request& r, MethodParams& params) {
1.156 paf 98: bool condition=params.as_bool(0, "condition must be expression", r);
1.6 paf 99: if(condition)
1.156 paf 100: r.write_pass_lang(r.process(*params.get(1)));
1.129 paf 101: else if(params.count()>2)
1.156 paf 102: r.write_pass_lang(r.process(*params.get(2)));
1.1 paf 103: }
104:
1.175 misha 105: static String::Language get_untaint_lang(MethodParams& params, int index){
106: const String& lang_name=params.as_string(index, "lang must be string");
107: String::Language lang=untaint_lang_name2enum.get(lang_name);
108: if(!lang)
1.183 misha 109: throw Exception(PARSER_RUNTIME,
1.175 misha 110: &lang_name,
111: "invalid taint language");
112: return lang;
113: }
114:
1.129 paf 115: static void _untaint(Request& r, MethodParams& params) {
116: String::Language lang;
117: if(params.count()==1)
1.175 misha 118: lang=String::L_AS_IS; // mark as simply 'as-is'. useful in html from sql
119: else
120: lang=get_untaint_lang(params, 0);
1.1 paf 121:
122: {
1.129 paf 123: Value& vbody=params.as_junction(params.count()-1, "body must be code");
1.1 paf 124:
125: Temp_lang temp_lang(r, lang); // set temporarily specified ^untaint[language;
1.86 paf 126: r.write_pass_lang(r.process(vbody)); // process marking tainted with that lang
1.1 paf 127: }
128: }
129:
1.129 paf 130: static void _taint(Request& r, MethodParams& params) {
131: String::Language lang;
132: if(params.count()==1)
1.175 misha 133: lang=String::L_TAINTED; // mark as simply 'tainted'. useful in table:create
134: else
135: lang=get_untaint_lang(params, 0);
1.1 paf 136:
137: {
1.129 paf 138: Value& vbody=params.as_no_junction(params.count()-1, "body must not be code");
1.1 paf 139:
1.129 paf 140: String result;
1.1 paf 141: result.append(
142: vbody.as_string(), // process marking tainted with that lang
143: lang, true); // force result language to specified
144: r.write_pass_lang(result);
145: }
146: }
147:
1.129 paf 148: static void _process(Request& r, MethodParams& params) {
149: Method* main_method;
150:
151: size_t index=0;
152: Value* target_self;
153: Value& maybe_target_self=params[index];
154: if(maybe_target_self.get_string() || maybe_target_self.get_junction())
155: target_self=&r.get_method_frame()->caller()->self();
156: else {
157: target_self=&maybe_target_self; index++;
158: }
159:
1.1 paf 160: {
1.129 paf 161: VStateless_class *target_class=target_self->get_last_derived_class();
1.116 paf 162: if(!target_class)
1.166 misha 163: throw Exception(PARSER_RUNTIME,
1.129 paf 164: 0,
1.116 paf 165: "no target class");
1.114 paf 166:
1.73 paf 167: // temporary remove language change
1.129 paf 168: Temp_lang temp_lang(r, String::L_PASS_APPENDED);
1.1 paf 169: // temporary zero @main so to maybe-replace it in processed code
1.129 paf 170: Temp_method temp_method_main(*target_class, main_method_name, 0);
1.1 paf 171: // temporary zero @auto so it wouldn't be auto-called in Request::use_buf
1.129 paf 172: Temp_method temp_method_auto(*target_class, auto_method_name, 0);
173:
1.146 paf 174: size_t options_index=index+1;
175: HashStringValue* options=0;
176: if(options_index<params.count()) {
177: Value& voptions=params.as_no_junction(options_index, "options must not be code");
178: options=voptions.get_hash();
179: if(!options)
1.166 misha 180: throw Exception(PARSER_RUNTIME,
1.146 paf 181: 0,
182: "options must be hash");
183: }
184:
1.129 paf 185: const String* main_alias=0;
1.146 paf 186: const String* file_alias=0;
187: int line_no_alias_offset=0;
188: if(options) {
189: int valid_options=0;
190: if(Value* vmain_alias=options->get(PROCESS_MAIN_OPTION_NAME)) {
191: valid_options++;
192: main_alias=&vmain_alias->as_string();
193: }
194: if(Value* vfile_alias=options->get(PROCESS_FILE_OPTION_NAME)) {
195: valid_options++;
196: file_alias=&vfile_alias->as_string();
197: }
198: if(Value* vline_no_alias_offset=options->get(PROCESS_LINENO_OPTION_NAME)) {
199: valid_options++;
200: line_no_alias_offset=vline_no_alias_offset->as_int();
201: }
202:
203: if(valid_options!=options->count())
1.166 misha 204: throw Exception(PARSER_RUNTIME,
1.146 paf 205: 0,
206: "called with invalid option");
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);
216: r.use_buf(*target_class,
217: source.cstr(String::L_UNSPECIFIED, r.connection(false)),
218: main_alias,
219: processe_file_no,
220: line_no_alias_offset);
1.1 paf 221:
1.73 paf 222: // main_method
1.129 paf 223: main_method=target_class->get_method(main_method_name);
1.73 paf 224: }
225: // after restoring current-request-lang
226: // maybe-execute @main[]
227: if(main_method) {
1.119 paf 228: // temporarily set method_frame's self to target_self
1.129 paf 229: Temp_method_frame_self tmfs(*r.get_method_frame(), *target_self);
1.73 paf 230: // execute!
231: r.execute(*main_method->parser_code);
1.1 paf 232: }
233: }
234:
1.138 paf 235: static void _rem(Request&, MethodParams& params) {
1.129 paf 236: params.as_junction(0, "body must be code");
1.1 paf 237: }
238:
1.129 paf 239: static void _while(Request& r, MethodParams& params) {
1.164 paf 240: Temp_hash_value<const String::Body, void*>
241: cycle_data_setter(r.classes_conf, cycle_data_name, /*any not null flag*/&r);
242:
1.170 misha 243: Value& vcondition=params.as_expression(0, "condition must be number, bool or expression");
244:
1.162 paf 245: Value& body_code=params.as_junction(1, "body must be code");
246: Value* delim_maybe_code=params.count()>2?¶ms[2]:0;
1.1 paf 247:
248: // while...
249: int endless_loop_count=0;
1.162 paf 250: bool need_delim=false;
1.1 paf 251: while(true) {
1.18 parser 252: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
1.166 misha 253: throw Exception(PARSER_RUNTIME,
1.129 paf 254: 0,
1.1 paf 255: "endless loop detected");
256:
1.86 paf 257: bool condition=r.process_to_value(vcondition,
1.1 paf 258: false/*don't intercept string*/).as_bool();
259: if(!condition) // ...condition is true
260: break;
261:
1.162 paf 262: StringOrValue sv_processed=r.process(body_code);
1.164 paf 263: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.162 paf 264: const String* s_processed=sv_processed.get_string();
265: if(delim_maybe_code && s_processed && s_processed->length()) { // delimiter set and we have body
266: if(need_delim) // need delim & iteration produced string?
267: r.write_pass_lang(r.process(*delim_maybe_code));
1.176 misha 268: else
269: need_delim=true;
1.162 paf 270: }
271: r.write_pass_lang(sv_processed);
1.164 paf 272:
273: if(lskip==Request::SKIP_BREAK)
274: break;
1.1 paf 275: }
276: }
277:
1.129 paf 278: static void _use(Request& r, MethodParams& params) {
1.171 misha 279: Value& vfile=params.as_no_junction(0, FILE_NAME_MUST_NOT_BE_CODE);
1.113 paf 280: r.use_file(r.main_class, vfile.as_string());
1.1 paf 281: }
282:
1.164 paf 283: static void set_skip(Request& r, Request::Skip askip) {
284: void* data=r.classes_conf.get(cycle_data_name);
285: if(!data)
1.166 misha 286: throw Exception(PARSER_RUNTIME,
1.164 paf 287: 0,
288: "without cycle");
289:
290: r.set_skip(askip);
291: }
292:
293: static void _break(Request& r, MethodParams&) {
294: set_skip(r, Request::SKIP_BREAK);
295: }
296:
297: static void _continue(Request& r, MethodParams&) {
298: set_skip(r, Request::SKIP_CONTINUE);
299: }
300:
1.129 paf 301: static void _for(Request& r, MethodParams& params) {
1.164 paf 302: Temp_hash_value<const String::Body, void*>
303: cycle_data_setter(r.classes_conf, cycle_data_name, /*any not null flag*/&r);
304:
1.129 paf 305: const String& var_name=params.as_string(0, "var name must be string");
306: int from=params.as_int(1, "from must be int", r);
307: int to=params.as_int(2, "to must be int", r);
308: Value& body_code=params.as_junction(3, "body must be code");
309: Value* delim_maybe_code=params.count()>4?¶ms[4]:0;
1.1 paf 310:
1.57 paf 311: if(to-from>=MAX_LOOPS) // too long loop?
1.166 misha 312: throw Exception(PARSER_RUNTIME,
1.129 paf 313: 0,
1.57 paf 314: "endless loop detected");
315:
1.1 paf 316: bool need_delim=false;
1.129 paf 317: VInt* vint=new VInt(0);
1.154 paf 318:
319: VMethodFrame& caller=*r.get_method_frame()->caller();
320: caller.put_element(caller, var_name, vint, false);
1.1 paf 321: for(int i=from; i<=to; i++) {
322: vint->set_int(i);
323:
1.108 paf 324: StringOrValue sv_processed=r.process(body_code);
1.164 paf 325: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.129 paf 326: const String* s_processed=sv_processed.get_string();
327: if(delim_maybe_code && s_processed && s_processed->length()) { // delimiter set and we have body
1.108 paf 328: if(need_delim) // need delim & iteration produced string?
1.86 paf 329: r.write_pass_lang(r.process(*delim_maybe_code));
1.176 misha 330: else
331: need_delim=true;
1.1 paf 332: }
1.108 paf 333: r.write_pass_lang(sv_processed);
1.164 paf 334:
335: if(lskip==Request::SKIP_BREAK)
336: break;
1.1 paf 337: }
338: }
339:
1.129 paf 340: static void _eval(Request& r, MethodParams& params) {
341: Value& expr=params.as_junction(0, "need expression");
1.1 paf 342: // evaluate expresion
1.129 paf 343: Value& value_result=r.process_to_value(expr,
1.165 misha 344: false/*don't intercept string*/).as_expr_result();
1.129 paf 345: if(params.count()>1) {
1.177 misha 346: const String& fmt=params.as_string(1, "fmt must be string").trim();
347: if(fmt.is_empty()){
348: r.write_no_lang(value_result);
349: } else {
350: r.write_no_lang(String(format(value_result.as_double(), fmt.cstrm())));
351: }
1.91 paf 352: } else
1.129 paf 353: r.write_no_lang(value_result);
1.1 paf 354: }
355:
1.129 paf 356: static void _connect(Request& r, MethodParams& params) {
1.63 paf 357: #ifdef RESOURCES_DEBUG
358: struct timeval mt[2];
359: #endif
1.129 paf 360: Value& url=params.as_no_junction(0, "url must not be code");
361: Value& body_code=params.as_junction(1, "body must be code");
1.1 paf 362:
1.129 paf 363: Table* protocol2driver_and_client=0;
364: if(Value* sql=r.main_class.get_element(String(MAIN_SQL_NAME), r.main_class, false)) {
365: if(Value* element=sql->get_element(String(MAIN_SQL_DRIVERS_NAME), *sql, false)) {
1.113 paf 366: protocol2driver_and_client=element->get_table();
367: }
368: }
1.11 paf 369:
1.63 paf 370: #ifdef RESOURCES_DEBUG
371: //measure:before
372: gettimeofday(&mt[0],NULL);
373: #endif
1.1 paf 374: // connect
1.142 paf 375: SQL_Connection* connection=SQL_driver_manager->get_connection(url.as_string(),
1.144 paf 376: protocol2driver_and_client,
1.180 misha 377: r.charsets.source().NAME().cstr(),
378: r.request_info.document_root);
1.1 paf 379:
1.63 paf 380: #ifdef RESOURCES_DEBUG
381: //measure:after connect
382: gettimeofday(&mt[1],NULL);
383:
384: double t[2];
385: for(int i=0;i<2;i++)
386: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
387:
388: r.sql_connect_time+=t[1]-t[0];
389: #endif
1.129 paf 390: Temp_connection temp_connection(r, connection);
1.1 paf 391: // execute body
1.53 parser 392: try {
1.86 paf 393: r.write_assign_lang(r.process(body_code));
1.129 paf 394: connection->commit();
395: connection->close();
1.75 paf 396: } catch(...) { // process problem
1.129 paf 397: connection->rollback();
398: connection->close();
399: rethrow;
1.1 paf 400: }
401: }
402:
1.41 parser 403: #ifndef DOXYGEN
1.129 paf 404: class Switch_data: public PA_Object {
405: public:
406: Request& r;
1.181 misha 407: const String* searching_string;
408: double searching_double;
1.129 paf 409: Value* found;
410: Value* _default;
411: public:
412: Switch_data(Request& ar, Value& asearching):
1.181 misha 413: r(ar)
414: {
415: if(asearching.is_string() || asearching.is_void()){
416: searching_string=&asearching.as_string();
417: searching_double=0;
418: } else {
419: searching_string=0;
420: searching_double=asearching.as_double();
421: }
422: }
1.28 parser 423: };
1.41 parser 424: #endif
1.129 paf 425: static void _switch(Request& r, MethodParams& params) {
426: Switch_data* data=new Switch_data(r, r.process_to_value(params[0]));
1.135 paf 427: Temp_hash_value<const String::Body, void*>
1.129 paf 428: switch_data_setter(r.classes_conf, switch_data_name, data);
1.28 parser 429:
1.129 paf 430: Value& cases_code=params.as_junction(1, "switch cases must be code");
1.82 paf 431: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
432: // because of stacked WWrapper used there as wcontext
1.84 paf 433: r.process(cases_code, true/*intercept_string*/);
1.147 paf 434: if(Value* selected_code=data->found? data->found: data->_default)
1.107 paf 435: r.write_pass_lang(r.process(*selected_code));
1.28 parser 436: }
437:
1.129 paf 438: static void _case(Request& r, MethodParams& params) {
439: Switch_data* data=static_cast<Switch_data*>(r.classes_conf.get(switch_data_name));
1.38 parser 440: if(!data)
1.166 misha 441: throw Exception(PARSER_RUNTIME,
1.129 paf 442: 0,
1.38 parser 443: "without switch");
1.28 parser 444:
1.181 misha 445: if(data->found) // matches already was found
446: return;
447:
1.129 paf 448: int count=params.count();
1.184 ! misha 449: Value* code=¶ms.as_expression(--count, "case result must be code");
! 450:
! 451: #ifdef USE_DESTRUCTORS
! 452: Junction *j=code->get_junction();
! 453: if (j){
! 454: code=new VJunction(j->self,j->method,j->method_frame,j->rcontext,j->wcontext,j->code);
! 455: if (j->wcontext) j->wcontext->attach_junction((VJunction *)code);
! 456: }
! 457: #endif
1.83 paf 458:
1.181 misha 459: for(int i=0; i<count; i++){
1.129 paf 460: Value& value=r.process_to_value(params[i]);
1.28 parser 461:
1.181 misha 462: if(value.is_string() && value.as_string() == CASE_DEFAULT_VALUE){
1.184 ! misha 463: data->_default=code;
1.181 misha 464: continue;
1.28 parser 465: }
466:
467: bool matches;
1.181 misha 468: if(data->searching_string)
469: matches=(*data->searching_string) == value.as_string();
1.28 parser 470: else
1.181 misha 471: matches=data->searching_double == value.as_double();
1.82 paf 472:
1.181 misha 473: if(matches){
1.184 ! misha 474: data->found=code;
1.28 parser 475: break;
476: }
477: }
478: }
1.136 paf 479: #ifndef DOXYGEN
480: struct Try_catch_result {
481: StringOrValue processed_code;
482: const String* exception_should_be_handled;
483:
484: Try_catch_result(): exception_should_be_handled(0) {}
485: };
486: #endif
487:
488: /// used by ^try and ^cache, @returns $exception.handled[string] if any
489: template<class I>
490: static Try_catch_result try_catch(Request& r,
491: StringOrValue body_code(Request&, I), I info,
1.179 misha 492: Value* catch_code,
493: bool could_be_handled_by_caller=false)
1.136 paf 494: {
495: Try_catch_result result;
1.179 misha 496:
1.136 paf 497: if(!catch_code) {
498: result.processed_code=body_code(r, info);
499: return result;
500: }
501:
502: // taking snapshot of try-context
503: Request_context_saver try_context(r);
504: try {
505: result.processed_code=body_code(r, info);
506: } catch(const Exception& e) {
507: Request_context_saver throw_context(r); // taking snapshot of throw-context [stack trace contains error]
508: Request::Exception_details details=r.get_details(e);
509: try_context.restore(); // restoring try-context to perform catch-code
510:
511: Junction* junction=catch_code->get_junction();
512: Value* method_frame=junction->method_frame;
513: Value* saved_exception_var_value=method_frame->get_element(exception_var_name, *method_frame, false);
1.154 paf 514: VMethodFrame& frame=*junction->method_frame;
515: frame.put_element(frame, exception_var_name, &details.vhash, false);
1.179 misha 516:
1.136 paf 517: result.processed_code=r.process(*catch_code);
518:
519: // retriving $exception.handled, restoring $exception var
520: Value* vhandled=details.vhash.hash().get(exception_handled_part_name);
1.154 paf 521: frame.put_element(frame, exception_var_name, saved_exception_var_value, false);
1.136 paf 522:
523: bool bhandled=false;
524: if(vhandled) {
525: if(vhandled->is_string()) { // not simple $exception.handled(1/0)?
1.160 paf 526: if(could_be_handled_by_caller) { // and we can possibly handle it
527: result.exception_should_be_handled=vhandled->get_string(); // considering 'recovered' and let the caller recover
528: return result;
529: }
530:
531: bhandled=false;
532: } else
1.179 misha 533: bhandled=vhandled->as_bool();
1.136 paf 534: }
535:
536: if(!bhandled) {
537: throw_context.restore(); // restoring throw-context [exception were not handled]
538: rethrow;
539: }
540: }
1.179 misha 541:
1.136 paf 542: return result;
543: }
1.28 parser 544:
1.63 paf 545: // cache--
546:
547: // consts
548:
1.152 paf 549: const int DATA_STRING_SERIALIZED_VERSION=0x0006;
1.63 paf 550:
551: // helper types
552:
553: #ifndef DOXYGEN
554: struct Data_string_serialized_prolog {
555: int version;
1.79 paf 556: time_t expires;
1.63 paf 557: };
558: #endif
559:
1.68 paf 560: void cache_delete(const String& file_spec) {
1.167 misha 561: file_delete(file_spec, false/*fail_on_problem*/);
1.63 paf 562: }
1.69 paf 563:
564: #ifndef DOXYGEN
1.135 paf 565: struct Cache_scope {
1.129 paf 566: public:
1.79 paf 567: time_t expires;
1.135 paf 568: const String* body_from_disk;
1.79 paf 569: };
1.69 paf 570: struct Locked_process_and_cache_put_action_info {
571: Request *r;
1.136 paf 572: Cache_scope *scope;
1.167 misha 573: Value* body_code;
574: Value* catch_code;
1.136 paf 575: const String* processed_code;
1.69 paf 576: };
577: #endif
1.136 paf 578:
579:
580:
581: static StringOrValue process_cache_body_code(Request& r, Value* body_code) {
1.153 paf 582: return StringOrValue(r.process_to_string(*body_code));
1.136 paf 583: }
584:
1.129 paf 585: /* @todo maybe network order worth spending some effort?
586: don't bothering myself with network byte order,
587: am not planning to be able to move resulting file across platforms
588: */
1.69 paf 589: static void locked_process_and_cache_put_action(int f, void *context) {
590: Locked_process_and_cache_put_action_info& info=
591: *static_cast<Locked_process_and_cache_put_action_info *>(context);
1.129 paf 592:
1.160 paf 593: const String* body_from_disk=info.scope->body_from_disk;
1.69 paf 594: // body->process
1.136 paf 595: Try_catch_result result=try_catch(*info.r,
596: process_cache_body_code, info.body_code,
1.160 paf 597: info.catch_code, body_from_disk!=0 /*we have something old=we can handle=recover later*/);
1.136 paf 598:
599: if(result.exception_should_be_handled) {
600: if(*result.exception_should_be_handled==CACHE_EXCEPTION_HANDLED_CACHE_NAME) {
1.160 paf 601: assert(body_from_disk);
602: info.processed_code=body_from_disk;
1.136 paf 603: } else
1.166 misha 604: throw Exception(PARSER_RUNTIME,
1.136 paf 605: result.exception_should_be_handled,
606: "$"EXCEPTION_VAR_NAME"."EXCEPTION_HANDLED_PART_NAME" value must be "
607: "either boolean or string '"CACHE_EXCEPTION_HANDLED_CACHE_NAME"'");
608: } else
609: info.processed_code=&result.processed_code.as_string();
1.69 paf 610:
1.79 paf 611: // expiration time not spoiled by ^cache(0) or something?
1.136 paf 612: if(info.scope->expires > time(0)) {
1.79 paf 613: // string -serialize> buffer
1.136 paf 614: String::Cm serialized=info.processed_code->serialize(
1.129 paf 615: sizeof(Data_string_serialized_prolog));
1.79 paf 616: Data_string_serialized_prolog& prolog=
1.129 paf 617: *reinterpret_cast<Data_string_serialized_prolog *>(serialized.str);
1.79 paf 618: prolog.version=DATA_STRING_SERIALIZED_VERSION;
1.136 paf 619: prolog.expires=info.scope->expires;
1.79 paf 620:
621: // buffer -write> file
1.129 paf 622: write(f, serialized.str, serialized.length);
1.79 paf 623: } else // expired!
1.136 paf 624: info.scope->expires=0; // flag it so that could be easily checked by caller
1.69 paf 625: }
1.129 paf 626: const String* locked_process_and_cache_put(Request& r,
1.128 paf 627: Value& body_code,
1.136 paf 628: Value* catch_code,
629: Cache_scope& scope,
630: const String& file_spec)
631: {
1.140 paf 632: Locked_process_and_cache_put_action_info info={&r, &scope, &body_code, catch_code, 0};
1.69 paf 633:
1.129 paf 634: const String* result=file_write_action_under_lock(
1.69 paf 635: file_spec,
1.168 misha 636: "cache_put",
637: locked_process_and_cache_put_action,
638: &info,
1.69 paf 639: false/*as_text*/,
640: false/*do_append*/,
1.173 misha 641: false/*block == don't wait till other thread release lock*/,
642: false/*dun throw exception if lock failed*/) ? info.processed_code: 0;
1.168 misha 643:
1.100 paf 644: time_t now=time(0);
1.136 paf 645: if(scope.expires<=now)
1.79 paf 646: cache_delete(file_spec);
647: return result;
1.63 paf 648: }
1.137 paf 649: #ifndef DOXYGEN
1.135 paf 650: struct Cache_get_result {
651: const String* body;
652: bool expired;
1.137 paf 653: };
654: #endif
655: static Cache_get_result cache_get(Request_charsets& charsets, const String& file_spec, time_t now) {
1.140 paf 656: Cache_get_result result={0, false};
1.135 paf 657:
1.129 paf 658: File_read_result file=file_read(charsets, file_spec,
1.63 paf 659: false/*as_text*/,
1.129 paf 660: 0, //no params
661: false/*fail_on_read_problem*/);
662: if(file.success && file.length/* ignore reads which are empty due to
1.72 paf 663: non-unary open+lockEX conflict with lockSH */) {
1.129 paf 664:
1.72 paf 665: Data_string_serialized_prolog& prolog=
1.129 paf 666: *reinterpret_cast<Data_string_serialized_prolog *>(file.str);
1.63 paf 667:
1.135 paf 668: String* body=new String;
1.72 paf 669: if(
1.129 paf 670: file.length>=sizeof(Data_string_serialized_prolog)
1.135 paf 671: && prolog.version==DATA_STRING_SERIALIZED_VERSION) {
672: if(body->deserialize(sizeof(Data_string_serialized_prolog), file.str, file.length)) {
673: result.body=body;
674: result.expired=prolog.expires <= now;
675: }
676: }
1.72 paf 677: }
1.63 paf 678:
1.135 paf 679: return result;
1.63 paf 680: }
1.129 paf 681: static time_t as_expires(Request& r, MethodParams& params,
1.79 paf 682: int index, time_t now) {
683: time_t result;
1.129 paf 684: if(Value* vdate=params[index].as(VDATE_TYPE, false))
685: result=static_cast<VDate*>(vdate)->get_time();
1.79 paf 686: else
1.129 paf 687: result=now+(time_t)params.as_double(index, "lifespan must be date or number", r);
1.79 paf 688:
689: return result;
690: }
1.129 paf 691: static const String& as_file_spec(Request& r, MethodParams& params, int index) {
692: return r.absolute(params.as_string(index, "filespec must be string"));
1.79 paf 693: }
1.129 paf 694: static void _cache(Request& r, MethodParams& params) {
1.173 misha 695: if(params.count()==0) {
696: // ^cache[] -- return current expiration time
1.158 paf 697: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
698: if(!scope)
1.166 misha 699: throw Exception(PARSER_RUNTIME,
1.158 paf 700: 0,
701: "expire-time get without cache");
702: r.write_no_lang(*new VDate(scope->expires));
703: return;
704: }
705:
1.79 paf 706: time_t now=time(0);
707:
1.129 paf 708: if(params.count()==1) {
1.173 misha 709: // ^cache[filename] ^cache(seconds) ^cache[expires date]
1.129 paf 710: if(params[0].is_string()) { // filename?
1.79 paf 711: cache_delete(as_file_spec(r, params, 0));
712: return;
713: }
714:
715: // secods|expires date
1.135 paf 716: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
717: if(!scope)
1.166 misha 718: throw Exception(PARSER_RUNTIME,
1.129 paf 719: 0,
1.79 paf 720: "expire-time reducing instruction without cache");
721:
1.129 paf 722: time_t expires=as_expires(r, params, 0, now);
1.135 paf 723: if(expires < scope->expires)
724: scope->expires=expires;
1.79 paf 725:
726: return;
1.149 paf 727: } else if(params.count()<3)
1.166 misha 728: throw Exception(PARSER_RUNTIME,
1.149 paf 729: 0,
730: "invalid number of parameters");
1.63 paf 731:
732: // file_spec, expires, body code
1.172 misha 733: const String& file_spec=as_file_spec(r, params, 0);
1.65 paf 734:
1.141 paf 735: Cache_scope scope={as_expires(r, params, 1, now), 0};
1.135 paf 736:
737: Temp_hash_value<const String::Body, void*>
738: cache_scope_setter(r.classes_conf, cache_data_name, &scope);
1.136 paf 739: Value& body_code=params.as_junction(2, "body_code must be code");
740: Value* catch_code=0;
741: if(params.count()>3)
742: catch_code=¶ms.as_junction(3, "catch_code must be code");
1.63 paf 743:
1.168 misha 744: if(scope.expires>now) {
745: Cache_get_result cached=cache_get(r.charsets, file_spec, now);
1.69 paf 746:
1.168 misha 747: if(cached.body) { // have cached copy
1.174 misha 748: if(cached.expired) {
749: scope.body_from_disk=cached.body; // storing for user to retrive it with ^cache[]
750: } else {
751: // and it's not expired yet write it out
1.168 misha 752: r.write_assign_lang(*cached.body);
753: // happy with it
754: return;
755: }
756: }
757:
758: // no cached info or it's already expired
1.173 misha 759:
760: // trying to process it under lock and store result in file
1.174 misha 761: const String* processed_body=locked_process_and_cache_put(r, body_code, catch_code, scope, file_spec);
1.173 misha 762: if(processed_body){
1.174 misha 763: // write it out
764: r.write_assign_lang(*processed_body);
765: // happy with it
766: return;
1.173 misha 767: } else {
768: // we fail while get exclusive lock. nvm, we just execute body_code a bit later
1.174 misha 769: }
1.69 paf 770: } else {
1.79 paf 771: // instructed not to cache; forget cached copy
1.68 paf 772: cache_delete(file_spec);
1.69 paf 773: }
1.168 misha 774:
775: // process without cacheing
776: const String& processed_body=r.process_to_string(body_code);
777: // write it out
778: r.write_assign_lang(processed_body);
1.63 paf 779: }
780:
1.136 paf 781: static StringOrValue process_try_body_code(Request& r, Value* body_code) {
782: return r.process(*body_code);
783: }
1.129 paf 784: static void _try_operator(Request& r, MethodParams& params) {
785: Value& body_code=params.as_junction(0, "body_code must be code");
786: Value& catch_code=params.as_junction(1, "catch_code must be code");
1.179 misha 787: Value* finally_code=(params.count()==3) ? ¶ms.as_junction(2, "finally_code must be code") : 0;
788:
789: Try_catch_result result;
790: StringOrValue finally_result;
791: try{
792: result=try_catch(r,
793: process_try_body_code, &body_code,
794: &catch_code);
795: if(result.exception_should_be_handled)
796: throw Exception(PARSER_RUNTIME,
797: result.exception_should_be_handled,
798: "catch block must set $exception.handled to some boolean value, not string");
799: } catch(...){
800: if(finally_code)
801: finally_result=r.process(*finally_code);
802: rethrow;
803: }
1.74 paf 804:
1.179 misha 805: if(finally_code)
806: finally_result=r.process(*finally_code);
1.123 paf 807:
1.136 paf 808: // write out processed body_code or catch_code
809: r.write_pass_lang(result.processed_code);
1.179 misha 810:
811: // write out processed finally code
812: if(finally_code)
813: r.write_pass_lang(finally_result);
1.74 paf 814: }
815:
1.138 paf 816: static void _throw_operator(Request&, MethodParams& params) {
1.178 misha 817: if(params.count()==1 && !params[0].is_string()) {
1.129 paf 818: if(HashStringValue *hash=params[0].get_hash()) {
819: const char* type=0;
820: if(Value* value=hash->get(exception_type_part_name))
1.78 paf 821: type=value->as_string().cstr();
1.129 paf 822: const String* source=0;
823: if(Value* value=hash->get(exception_source_part_name))
1.74 paf 824: source=&value->as_string();
1.138 paf 825: const char* comment=0;
1.129 paf 826: if(Value* value=hash->get(exception_comment_part_name))
1.74 paf 827: comment=value->as_string().cstr();
828:
1.78 paf 829: throw Exception(type,
1.129 paf 830: source?source:0,
831: "%s", comment?comment:"");
1.74 paf 832: } else
1.166 misha 833: throw Exception(PARSER_RUNTIME,
1.129 paf 834: 0,
1.178 misha 835: "one-param version has hash or string param");
1.74 paf 836: } else {
1.129 paf 837: const char* type=params.as_string(0, "type must be string").cstr();
1.178 misha 838: const String* source=params.count()>1? ¶ms.as_string(1, "source must be string"):0;
839: const char* comment=params.count()>2? params.as_string(2, "comment must be string").cstr():0;
840: throw Exception(type, source, "%s", comment?comment:"");
1.74 paf 841: }
1.132 paf 842: }
1.129 paf 843:
1.150 paf 844: static void _sleep_operator(Request& r, MethodParams& params) {
845: double seconds=params.as_double(0, "seconds must be double", r);
1.151 paf 846: pa_sleep((int)trunc(seconds), (int)trunc(seconds*1000));
1.150 paf 847: }
848:
1.129 paf 849: #if defined(WIN32) && defined(_DEBUG)
850: # define PA_BPT
1.138 paf 851: static void _bpt(Request&, MethodParams&) {
1.129 paf 852: _asm int 3;
853: }
854: #endif
855:
1.10 paf 856: // constructor
857:
1.129 paf 858: VClassMAIN::VClassMAIN(): VClass() {
859: set_name(*new String(MAIN_CLASS_NAME));
860:
861: #ifdef PA_BPT
862: // ^bpt[]
863: add_native_method("bpt", Method::CT_ANY, _bpt, 0, 0);
864: #endif
1.121 paf 865:
1.1 paf 866: // ^if(condition){code-when-true}
867: // ^if(condition){code-when-true}{code-when-false}
1.10 paf 868: add_native_method("if", Method::CT_ANY, _if, 2, 3);
1.1 paf 869:
870: // ^untaint[as-is|uri|sql|js|html|html-typo]{code}
1.59 paf 871: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2);
1.1 paf 872:
873: // ^taint[as-is|uri|sql|js|html|html-typo]{code}
1.10 paf 874: add_native_method("taint", Method::CT_ANY, _taint, 1, 2);
1.1 paf 875:
876: // ^process[code]
1.146 paf 877: add_native_method("process", Method::CT_ANY, _process, 1, 3);
1.1 paf 878:
879: // ^rem{code}
1.51 parser 880: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000);
1.1 paf 881:
882: // ^while(condition){code}
1.162 paf 883: add_native_method("while", Method::CT_ANY, _while, 2, 3);
1.1 paf 884:
885: // ^use[file]
1.10 paf 886: add_native_method("use", Method::CT_ANY, _use, 1, 1);
1.1 paf 887:
1.164 paf 888: // ^break[]
889: add_native_method("break", Method::CT_ANY, _break, 0, 0);
890: // ^continue[]
891: add_native_method("continue", Method::CT_ANY, _continue, 0, 0);
1.54 paf 892: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.10 paf 893: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1);
1.1 paf 894:
895: // ^eval(expr)
896: // ^eval(expr)[format]
1.10 paf 897: add_native_method("eval", Method::CT_ANY, _eval, 1, 2);
1.52 parser 898:
1.1 paf 899: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 900: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
901:
1.63 paf 902:
1.136 paf 903: // ^cache[file_spec](time){code}[{catch code}] time=0 no cache
1.65 paf 904: // ^cache[file_spec] delete cache
1.161 paf 905: // ^cache[] get current expiration time
906: add_native_method("cache", Method::CT_ANY, _cache, 0, 4);
1.63 paf 907:
1.28 parser 908: // switch
909:
910: // ^switch[value]{cases}
911: add_native_method("switch", Method::CT_ANY, _switch, 2, 2);
912:
913: // ^case[value]{code}
1.51 parser 914: add_native_method("case", Method::CT_ANY, _case, 2, 10000);
1.74 paf 915:
916: // try-catch
917:
918: // ^try{code}{catch code}
1.179 misha 919: add_native_method("try", Method::CT_ANY, _try_operator, 2, 3);
1.74 paf 920: // ^throw[$exception hash]
921: // ^throw[type;source;comment]
922: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
923:
1.150 paf 924: add_native_method("sleep", Method::CT_ANY, _sleep_operator, 1, 1);
1.10 paf 925: }
1.11 paf 926:
927: // constructor & configurator
1.1 paf 928:
1.129 paf 929: VStateless_class& VClassMAIN_create() {
930: return *new VClassMAIN;
1.1 paf 931: }
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