Annotation of parser3/src/classes/op.C, revision 1.176
1.1 paf 1: /** @file
1.9 paf 2: Parser: parser @b operators.
1.1 paf 3:
1.155 paf 4: Copyright (c) 2001-2005 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:
1.176 ! misha 8: static const char * const IDENT_OP_C="$Date: 2008-02-15 18:08:47 $";
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)
109: throw Exception(0,
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) {
346: Value& fmt=params.as_no_junction(1, "fmt must not be code");
347: r.write_no_lang(String(format(value_result.as_double(), fmt.as_string().cstrm())));
1.91 paf 348: } else
1.129 paf 349: r.write_no_lang(value_result);
1.1 paf 350: }
351:
1.129 paf 352: static void _connect(Request& r, MethodParams& params) {
1.63 paf 353: #ifdef RESOURCES_DEBUG
354: struct timeval mt[2];
355: #endif
1.129 paf 356: Value& url=params.as_no_junction(0, "url must not be code");
357: Value& body_code=params.as_junction(1, "body must be code");
1.1 paf 358:
1.129 paf 359: Table* protocol2driver_and_client=0;
360: if(Value* sql=r.main_class.get_element(String(MAIN_SQL_NAME), r.main_class, false)) {
361: if(Value* element=sql->get_element(String(MAIN_SQL_DRIVERS_NAME), *sql, false)) {
1.113 paf 362: protocol2driver_and_client=element->get_table();
363: }
364: }
1.11 paf 365:
1.63 paf 366: #ifdef RESOURCES_DEBUG
367: //measure:before
368: gettimeofday(&mt[0],NULL);
369: #endif
1.1 paf 370: // connect
1.142 paf 371: SQL_Connection* connection=SQL_driver_manager->get_connection(url.as_string(),
1.144 paf 372: protocol2driver_and_client,
373: r.charsets.source().NAME().cstr());
1.1 paf 374:
1.63 paf 375: #ifdef RESOURCES_DEBUG
376: //measure:after connect
377: gettimeofday(&mt[1],NULL);
378:
379: double t[2];
380: for(int i=0;i<2;i++)
381: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
382:
383: r.sql_connect_time+=t[1]-t[0];
384: #endif
1.129 paf 385: Temp_connection temp_connection(r, connection);
1.1 paf 386: // execute body
1.53 parser 387: try {
1.86 paf 388: r.write_assign_lang(r.process(body_code));
1.129 paf 389: connection->commit();
390: connection->close();
1.75 paf 391: } catch(...) { // process problem
1.129 paf 392: connection->rollback();
393: connection->close();
394: rethrow;
1.1 paf 395: }
396: }
397:
1.41 parser 398: #ifndef DOXYGEN
1.129 paf 399: class Switch_data: public PA_Object {
400: public:
401: Request& r;
402: Value& searching;
403: Value* found;
404: Value* _default;
405: public:
406: Switch_data(Request& ar, Value& asearching):
407: r(ar), searching(asearching) {}
1.28 parser 408: };
1.41 parser 409: #endif
1.129 paf 410: static void _switch(Request& r, MethodParams& params) {
411: Switch_data* data=new Switch_data(r, r.process_to_value(params[0]));
1.135 paf 412: Temp_hash_value<const String::Body, void*>
1.129 paf 413: switch_data_setter(r.classes_conf, switch_data_name, data);
1.28 parser 414:
1.129 paf 415: Value& cases_code=params.as_junction(1, "switch cases must be code");
1.82 paf 416: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
417: // because of stacked WWrapper used there as wcontext
1.84 paf 418: r.process(cases_code, true/*intercept_string*/);
1.147 paf 419: if(Value* selected_code=data->found? data->found: data->_default)
1.107 paf 420: r.write_pass_lang(r.process(*selected_code));
1.28 parser 421: }
422:
1.129 paf 423: static void _case(Request& r, MethodParams& params) {
424: Switch_data* data=static_cast<Switch_data*>(r.classes_conf.get(switch_data_name));
1.38 parser 425: if(!data)
1.166 misha 426: throw Exception(PARSER_RUNTIME,
1.129 paf 427: 0,
1.38 parser 428: "without switch");
1.28 parser 429:
1.129 paf 430: int count=params.count();
431: Value& code=params.as_junction(--count, "case result must be code");
1.83 paf 432:
1.163 paf 433: Value& searching=data->searching;
434: bool we_are_searching_string_or_void=searching.is_string() || searching.is_void();
1.28 parser 435: for(int i=0; i<count; i++) {
1.129 paf 436: Value& value=r.process_to_value(params[i]);
1.28 parser 437:
1.157 paf 438: if(value.is_string() && value.as_string() == CASE_DEFAULT_VALUE) {
1.129 paf 439: data->_default=&code;
1.28 parser 440: break;
441: }
442:
443: bool matches;
1.163 paf 444: if(we_are_searching_string_or_void)
445: matches=searching.as_string() == value.as_string();
1.28 parser 446: else
1.163 paf 447: matches=searching.as_double() == value.as_double();
1.28 parser 448:
449: if(matches) {
1.82 paf 450: if(data->found)
1.166 misha 451: throw Exception(PARSER_RUNTIME,
1.129 paf 452: 0,
1.82 paf 453: "duplicate found");
454:
1.129 paf 455: data->found=&code;
1.28 parser 456: break;
457: }
458: }
459: }
1.136 paf 460: #ifndef DOXYGEN
461: struct Try_catch_result {
462: StringOrValue processed_code;
463: const String* exception_should_be_handled;
464:
465: Try_catch_result(): exception_should_be_handled(0) {}
466: };
467: #endif
468:
469: /// used by ^try and ^cache, @returns $exception.handled[string] if any
470: template<class I>
471: static Try_catch_result try_catch(Request& r,
472: StringOrValue body_code(Request&, I), I info,
1.160 paf 473: Value* catch_code, bool could_be_handled_by_caller=false)
1.136 paf 474: {
475: Try_catch_result result;
476: if(!catch_code) {
477: result.processed_code=body_code(r, info);
478: return result;
479: }
480:
481: // taking snapshot of try-context
482: Request_context_saver try_context(r);
483: try {
484: result.processed_code=body_code(r, info);
485: } catch(const Exception& e) {
486: Request_context_saver throw_context(r); // taking snapshot of throw-context [stack trace contains error]
487: Request::Exception_details details=r.get_details(e);
488: try_context.restore(); // restoring try-context to perform catch-code
489:
490: Junction* junction=catch_code->get_junction();
491: Value* method_frame=junction->method_frame;
492: Value* saved_exception_var_value=method_frame->get_element(exception_var_name, *method_frame, false);
1.154 paf 493: VMethodFrame& frame=*junction->method_frame;
494: frame.put_element(frame, exception_var_name, &details.vhash, false);
1.136 paf 495: result.processed_code=r.process(*catch_code);
496:
497: // retriving $exception.handled, restoring $exception var
498: Value* vhandled=details.vhash.hash().get(exception_handled_part_name);
1.154 paf 499: frame.put_element(frame, exception_var_name, saved_exception_var_value, false);
1.136 paf 500:
501: bool bhandled=false;
502: if(vhandled) {
503: if(vhandled->is_string()) { // not simple $exception.handled(1/0)?
1.160 paf 504: if(could_be_handled_by_caller) { // and we can possibly handle it
505: result.exception_should_be_handled=vhandled->get_string(); // considering 'recovered' and let the caller recover
506: return result;
507: }
508:
509: bhandled=false;
510: } else
511: bhandled=vhandled->as_bool();
1.136 paf 512: }
513:
514: if(!bhandled) {
515: throw_context.restore(); // restoring throw-context [exception were not handled]
516: rethrow;
517: }
518: }
519: return result;
520: }
1.28 parser 521:
1.63 paf 522: // cache--
523:
524: // consts
525:
1.152 paf 526: const int DATA_STRING_SERIALIZED_VERSION=0x0006;
1.63 paf 527:
528: // helper types
529:
530: #ifndef DOXYGEN
531: struct Data_string_serialized_prolog {
532: int version;
1.79 paf 533: time_t expires;
1.63 paf 534: };
535: #endif
536:
1.68 paf 537: void cache_delete(const String& file_spec) {
1.167 misha 538: file_delete(file_spec, false/*fail_on_problem*/);
1.63 paf 539: }
1.69 paf 540:
541: #ifndef DOXYGEN
1.135 paf 542: struct Cache_scope {
1.129 paf 543: public:
1.79 paf 544: time_t expires;
1.135 paf 545: const String* body_from_disk;
1.79 paf 546: };
1.69 paf 547: struct Locked_process_and_cache_put_action_info {
548: Request *r;
1.136 paf 549: Cache_scope *scope;
1.167 misha 550: Value* body_code;
551: Value* catch_code;
1.136 paf 552: const String* processed_code;
1.69 paf 553: };
554: #endif
1.136 paf 555:
556:
557:
558: static StringOrValue process_cache_body_code(Request& r, Value* body_code) {
1.153 paf 559: return StringOrValue(r.process_to_string(*body_code));
1.136 paf 560: }
561:
1.129 paf 562: /* @todo maybe network order worth spending some effort?
563: don't bothering myself with network byte order,
564: am not planning to be able to move resulting file across platforms
565: */
1.69 paf 566: static void locked_process_and_cache_put_action(int f, void *context) {
567: Locked_process_and_cache_put_action_info& info=
568: *static_cast<Locked_process_and_cache_put_action_info *>(context);
1.129 paf 569:
1.160 paf 570: const String* body_from_disk=info.scope->body_from_disk;
1.69 paf 571: // body->process
1.136 paf 572: Try_catch_result result=try_catch(*info.r,
573: process_cache_body_code, info.body_code,
1.160 paf 574: info.catch_code, body_from_disk!=0 /*we have something old=we can handle=recover later*/);
1.136 paf 575:
576: if(result.exception_should_be_handled) {
577: if(*result.exception_should_be_handled==CACHE_EXCEPTION_HANDLED_CACHE_NAME) {
1.160 paf 578: assert(body_from_disk);
579: info.processed_code=body_from_disk;
1.136 paf 580: } else
1.166 misha 581: throw Exception(PARSER_RUNTIME,
1.136 paf 582: result.exception_should_be_handled,
583: "$"EXCEPTION_VAR_NAME"."EXCEPTION_HANDLED_PART_NAME" value must be "
584: "either boolean or string '"CACHE_EXCEPTION_HANDLED_CACHE_NAME"'");
585: } else
586: info.processed_code=&result.processed_code.as_string();
1.69 paf 587:
1.79 paf 588: // expiration time not spoiled by ^cache(0) or something?
1.136 paf 589: if(info.scope->expires > time(0)) {
1.79 paf 590: // string -serialize> buffer
1.136 paf 591: String::Cm serialized=info.processed_code->serialize(
1.129 paf 592: sizeof(Data_string_serialized_prolog));
1.79 paf 593: Data_string_serialized_prolog& prolog=
1.129 paf 594: *reinterpret_cast<Data_string_serialized_prolog *>(serialized.str);
1.79 paf 595: prolog.version=DATA_STRING_SERIALIZED_VERSION;
1.136 paf 596: prolog.expires=info.scope->expires;
1.79 paf 597:
598: // buffer -write> file
1.129 paf 599: write(f, serialized.str, serialized.length);
1.79 paf 600: } else // expired!
1.136 paf 601: info.scope->expires=0; // flag it so that could be easily checked by caller
1.69 paf 602: }
1.129 paf 603: const String* locked_process_and_cache_put(Request& r,
1.128 paf 604: Value& body_code,
1.136 paf 605: Value* catch_code,
606: Cache_scope& scope,
607: const String& file_spec)
608: {
1.140 paf 609: Locked_process_and_cache_put_action_info info={&r, &scope, &body_code, catch_code, 0};
1.69 paf 610:
1.129 paf 611: const String* result=file_write_action_under_lock(
1.69 paf 612: file_spec,
1.168 misha 613: "cache_put",
614: locked_process_and_cache_put_action,
615: &info,
1.69 paf 616: false/*as_text*/,
617: false/*do_append*/,
1.173 misha 618: false/*block == don't wait till other thread release lock*/,
619: false/*dun throw exception if lock failed*/) ? info.processed_code: 0;
1.168 misha 620:
1.100 paf 621: time_t now=time(0);
1.136 paf 622: if(scope.expires<=now)
1.79 paf 623: cache_delete(file_spec);
624: return result;
1.63 paf 625: }
1.137 paf 626: #ifndef DOXYGEN
1.135 paf 627: struct Cache_get_result {
628: const String* body;
629: bool expired;
1.137 paf 630: };
631: #endif
632: static Cache_get_result cache_get(Request_charsets& charsets, const String& file_spec, time_t now) {
1.140 paf 633: Cache_get_result result={0, false};
1.135 paf 634:
1.129 paf 635: File_read_result file=file_read(charsets, file_spec,
1.63 paf 636: false/*as_text*/,
1.129 paf 637: 0, //no params
638: false/*fail_on_read_problem*/);
639: if(file.success && file.length/* ignore reads which are empty due to
1.72 paf 640: non-unary open+lockEX conflict with lockSH */) {
1.129 paf 641:
1.72 paf 642: Data_string_serialized_prolog& prolog=
1.129 paf 643: *reinterpret_cast<Data_string_serialized_prolog *>(file.str);
1.63 paf 644:
1.135 paf 645: String* body=new String;
1.72 paf 646: if(
1.129 paf 647: file.length>=sizeof(Data_string_serialized_prolog)
1.135 paf 648: && prolog.version==DATA_STRING_SERIALIZED_VERSION) {
649: if(body->deserialize(sizeof(Data_string_serialized_prolog), file.str, file.length)) {
650: result.body=body;
651: result.expired=prolog.expires <= now;
652: }
653: }
1.72 paf 654: }
1.63 paf 655:
1.135 paf 656: return result;
1.63 paf 657: }
1.129 paf 658: static time_t as_expires(Request& r, MethodParams& params,
1.79 paf 659: int index, time_t now) {
660: time_t result;
1.129 paf 661: if(Value* vdate=params[index].as(VDATE_TYPE, false))
662: result=static_cast<VDate*>(vdate)->get_time();
1.79 paf 663: else
1.129 paf 664: result=now+(time_t)params.as_double(index, "lifespan must be date or number", r);
1.79 paf 665:
666: return result;
667: }
1.129 paf 668: static const String& as_file_spec(Request& r, MethodParams& params, int index) {
669: return r.absolute(params.as_string(index, "filespec must be string"));
1.79 paf 670: }
1.129 paf 671: static void _cache(Request& r, MethodParams& params) {
1.173 misha 672: if(params.count()==0) {
673: // ^cache[] -- return current expiration time
1.158 paf 674: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
675: if(!scope)
1.166 misha 676: throw Exception(PARSER_RUNTIME,
1.158 paf 677: 0,
678: "expire-time get without cache");
679: r.write_no_lang(*new VDate(scope->expires));
680: return;
681: }
682:
1.79 paf 683: time_t now=time(0);
684:
1.129 paf 685: if(params.count()==1) {
1.173 misha 686: // ^cache[filename] ^cache(seconds) ^cache[expires date]
1.129 paf 687: if(params[0].is_string()) { // filename?
1.79 paf 688: cache_delete(as_file_spec(r, params, 0));
689: return;
690: }
691:
692: // secods|expires date
1.135 paf 693: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
694: if(!scope)
1.166 misha 695: throw Exception(PARSER_RUNTIME,
1.129 paf 696: 0,
1.79 paf 697: "expire-time reducing instruction without cache");
698:
1.129 paf 699: time_t expires=as_expires(r, params, 0, now);
1.135 paf 700: if(expires < scope->expires)
701: scope->expires=expires;
1.79 paf 702:
703: return;
1.149 paf 704: } else if(params.count()<3)
1.166 misha 705: throw Exception(PARSER_RUNTIME,
1.149 paf 706: 0,
707: "invalid number of parameters");
1.63 paf 708:
709: // file_spec, expires, body code
1.172 misha 710: const String& file_spec=as_file_spec(r, params, 0);
1.65 paf 711:
1.141 paf 712: Cache_scope scope={as_expires(r, params, 1, now), 0};
1.135 paf 713:
714: Temp_hash_value<const String::Body, void*>
715: cache_scope_setter(r.classes_conf, cache_data_name, &scope);
1.136 paf 716: Value& body_code=params.as_junction(2, "body_code must be code");
717: Value* catch_code=0;
718: if(params.count()>3)
719: catch_code=¶ms.as_junction(3, "catch_code must be code");
1.63 paf 720:
1.168 misha 721: if(scope.expires>now) {
722: Cache_get_result cached=cache_get(r.charsets, file_spec, now);
1.69 paf 723:
1.168 misha 724: if(cached.body) { // have cached copy
1.174 misha 725: if(cached.expired) {
726: scope.body_from_disk=cached.body; // storing for user to retrive it with ^cache[]
727: } else {
728: // and it's not expired yet write it out
1.168 misha 729: r.write_assign_lang(*cached.body);
730: // happy with it
731: return;
732: }
733: }
734:
735: // no cached info or it's already expired
1.173 misha 736:
737: // trying to process it under lock and store result in file
1.174 misha 738: const String* processed_body=locked_process_and_cache_put(r, body_code, catch_code, scope, file_spec);
1.173 misha 739: if(processed_body){
1.174 misha 740: // write it out
741: r.write_assign_lang(*processed_body);
742: // happy with it
743: return;
1.173 misha 744: } else {
745: // we fail while get exclusive lock. nvm, we just execute body_code a bit later
1.174 misha 746: }
1.69 paf 747: } else {
1.79 paf 748: // instructed not to cache; forget cached copy
1.68 paf 749: cache_delete(file_spec);
1.69 paf 750: }
1.168 misha 751:
752: // process without cacheing
753: const String& processed_body=r.process_to_string(body_code);
754: // write it out
755: r.write_assign_lang(processed_body);
1.63 paf 756: }
757:
1.136 paf 758: static StringOrValue process_try_body_code(Request& r, Value* body_code) {
759: return r.process(*body_code);
760: }
1.129 paf 761: static void _try_operator(Request& r, MethodParams& params) {
762: Value& body_code=params.as_junction(0, "body_code must be code");
763: Value& catch_code=params.as_junction(1, "catch_code must be code");
1.74 paf 764:
1.136 paf 765: Try_catch_result result=try_catch(r,
766: process_try_body_code, &body_code,
767: &catch_code);
768:
769: if(result.exception_should_be_handled)
1.166 misha 770: throw Exception(PARSER_RUNTIME,
1.136 paf 771: result.exception_should_be_handled,
772: "catch block must set $exception.handled to some boolean value, not string");
1.123 paf 773:
1.136 paf 774: // write out processed body_code or catch_code
775: r.write_pass_lang(result.processed_code);
1.74 paf 776: }
777:
1.138 paf 778: static void _throw_operator(Request&, MethodParams& params) {
1.129 paf 779: if(params.count()==1) {
780: if(HashStringValue *hash=params[0].get_hash()) {
781: const char* type=0;
782: if(Value* value=hash->get(exception_type_part_name))
1.78 paf 783: type=value->as_string().cstr();
1.129 paf 784: const String* source=0;
785: if(Value* value=hash->get(exception_source_part_name))
1.74 paf 786: source=&value->as_string();
1.138 paf 787: const char* comment=0;
1.129 paf 788: if(Value* value=hash->get(exception_comment_part_name))
1.74 paf 789: comment=value->as_string().cstr();
790:
1.78 paf 791: throw Exception(type,
1.129 paf 792: source?source:0,
793: "%s", comment?comment:"");
1.74 paf 794: } else
1.166 misha 795: throw Exception(PARSER_RUNTIME,
1.129 paf 796: 0,
1.74 paf 797: "one-param version has hash param");
798: } else {
1.129 paf 799: const char* type=params.as_string(0, "type must be string").cstr();
800: const String& source=params.as_string(1, "source must be string");
801: const char* comment=params.count()>2? params.as_string(2, "comment must be string").cstr()
802: :0;
1.97 paf 803: throw Exception(type, &source, "%s", comment?comment:"");
1.74 paf 804: }
1.132 paf 805: }
1.129 paf 806:
1.150 paf 807: static void _sleep_operator(Request& r, MethodParams& params) {
808: double seconds=params.as_double(0, "seconds must be double", r);
1.151 paf 809: pa_sleep((int)trunc(seconds), (int)trunc(seconds*1000));
1.150 paf 810: }
811:
1.129 paf 812: #if defined(WIN32) && defined(_DEBUG)
813: # define PA_BPT
1.138 paf 814: static void _bpt(Request&, MethodParams&) {
1.129 paf 815: _asm int 3;
816: }
817: #endif
818:
1.10 paf 819: // constructor
820:
1.129 paf 821: VClassMAIN::VClassMAIN(): VClass() {
822: set_name(*new String(MAIN_CLASS_NAME));
823:
824: #ifdef PA_BPT
825: // ^bpt[]
826: add_native_method("bpt", Method::CT_ANY, _bpt, 0, 0);
827: #endif
1.121 paf 828:
1.1 paf 829: // ^if(condition){code-when-true}
830: // ^if(condition){code-when-true}{code-when-false}
1.10 paf 831: add_native_method("if", Method::CT_ANY, _if, 2, 3);
1.1 paf 832:
833: // ^untaint[as-is|uri|sql|js|html|html-typo]{code}
1.59 paf 834: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2);
1.1 paf 835:
836: // ^taint[as-is|uri|sql|js|html|html-typo]{code}
1.10 paf 837: add_native_method("taint", Method::CT_ANY, _taint, 1, 2);
1.1 paf 838:
839: // ^process[code]
1.146 paf 840: add_native_method("process", Method::CT_ANY, _process, 1, 3);
1.1 paf 841:
842: // ^rem{code}
1.51 parser 843: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000);
1.1 paf 844:
845: // ^while(condition){code}
1.162 paf 846: add_native_method("while", Method::CT_ANY, _while, 2, 3);
1.1 paf 847:
848: // ^use[file]
1.10 paf 849: add_native_method("use", Method::CT_ANY, _use, 1, 1);
1.1 paf 850:
1.164 paf 851: // ^break[]
852: add_native_method("break", Method::CT_ANY, _break, 0, 0);
853: // ^continue[]
854: add_native_method("continue", Method::CT_ANY, _continue, 0, 0);
1.54 paf 855: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.10 paf 856: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1);
1.1 paf 857:
858: // ^eval(expr)
859: // ^eval(expr)[format]
1.10 paf 860: add_native_method("eval", Method::CT_ANY, _eval, 1, 2);
1.52 parser 861:
1.1 paf 862: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 863: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
864:
1.63 paf 865:
1.136 paf 866: // ^cache[file_spec](time){code}[{catch code}] time=0 no cache
1.65 paf 867: // ^cache[file_spec] delete cache
1.161 paf 868: // ^cache[] get current expiration time
869: add_native_method("cache", Method::CT_ANY, _cache, 0, 4);
1.63 paf 870:
1.28 parser 871: // switch
872:
873: // ^switch[value]{cases}
874: add_native_method("switch", Method::CT_ANY, _switch, 2, 2);
875:
876: // ^case[value]{code}
1.51 parser 877: add_native_method("case", Method::CT_ANY, _case, 2, 10000);
1.74 paf 878:
879: // try-catch
880:
881: // ^try{code}{catch code}
882: add_native_method("try", Method::CT_ANY, _try_operator, 2, 2);
883: // ^throw[$exception hash]
884: // ^throw[type;source;comment]
885: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
886:
1.150 paf 887: add_native_method("sleep", Method::CT_ANY, _sleep_operator, 1, 1);
1.10 paf 888: }
1.11 paf 889:
890: // constructor & configurator
1.1 paf 891:
1.129 paf 892: VStateless_class& VClassMAIN_create() {
893: return *new VClassMAIN;
1.1 paf 894: }
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