Annotation of parser3/src/classes/op.C, revision 1.190
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:
1.190 ! misha 8: static const char * const IDENT_OP_C="$Date: 2009-06-04 12:38:46 $";
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:
1.187 misha 73: class Untaint_lang_name2enum: public HashString<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)
1.185 misha 100: r.process_write(*params.get(1));
1.129 paf 101: else if(params.count()>2)
1.185 misha 102: r.process_write(*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:
1.188 misha 125: StringOrValue result;
126: {
127: Temp_lang temp_lang(r, lang); // set temporarily specified ^untaint[language;
128: result=r.process(vbody); // process marking tainted with that lang
129: }
130: r.write_assign_lang(result);
1.1 paf 131: }
132: }
133:
1.129 paf 134: static void _taint(Request& r, MethodParams& params) {
135: String::Language lang;
136: if(params.count()==1)
1.175 misha 137: lang=String::L_TAINTED; // mark as simply 'tainted'. useful in table:create
138: else
139: lang=get_untaint_lang(params, 0);
1.1 paf 140:
141: {
1.129 paf 142: Value& vbody=params.as_no_junction(params.count()-1, "body must not be code");
1.1 paf 143:
1.129 paf 144: String result;
1.1 paf 145: result.append(
146: vbody.as_string(), // process marking tainted with that lang
147: lang, true); // force result language to specified
1.188 misha 148: r.write_assign_lang(result);
1.1 paf 149: }
150: }
151:
1.129 paf 152: static void _process(Request& r, MethodParams& params) {
153: Method* main_method;
154:
155: size_t index=0;
156: Value* target_self;
157: Value& maybe_target_self=params[index];
158: if(maybe_target_self.get_string() || maybe_target_self.get_junction())
159: target_self=&r.get_method_frame()->caller()->self();
160: else {
161: target_self=&maybe_target_self; index++;
162: }
163:
1.1 paf 164: {
1.129 paf 165: VStateless_class *target_class=target_self->get_last_derived_class();
1.116 paf 166: if(!target_class)
1.166 misha 167: throw Exception(PARSER_RUNTIME,
1.129 paf 168: 0,
1.116 paf 169: "no target class");
1.114 paf 170:
1.73 paf 171: // temporary remove language change
1.129 paf 172: Temp_lang temp_lang(r, String::L_PASS_APPENDED);
1.1 paf 173: // temporary zero @main so to maybe-replace it in processed code
1.129 paf 174: Temp_method temp_method_main(*target_class, main_method_name, 0);
1.1 paf 175: // temporary zero @auto so it wouldn't be auto-called in Request::use_buf
1.129 paf 176: Temp_method temp_method_auto(*target_class, auto_method_name, 0);
177:
1.146 paf 178: size_t options_index=index+1;
179: HashStringValue* options=0;
180: if(options_index<params.count()) {
181: Value& voptions=params.as_no_junction(options_index, "options must not be code");
182: options=voptions.get_hash();
183: if(!options)
1.166 misha 184: throw Exception(PARSER_RUNTIME,
1.146 paf 185: 0,
186: "options must be hash");
187: }
188:
1.129 paf 189: const String* main_alias=0;
1.146 paf 190: const String* file_alias=0;
191: int line_no_alias_offset=0;
192: if(options) {
193: int valid_options=0;
194: if(Value* vmain_alias=options->get(PROCESS_MAIN_OPTION_NAME)) {
195: valid_options++;
196: main_alias=&vmain_alias->as_string();
197: }
198: if(Value* vfile_alias=options->get(PROCESS_FILE_OPTION_NAME)) {
199: valid_options++;
200: file_alias=&vfile_alias->as_string();
201: }
202: if(Value* vline_no_alias_offset=options->get(PROCESS_LINENO_OPTION_NAME)) {
203: valid_options++;
204: line_no_alias_offset=vline_no_alias_offset->as_int();
205: }
206:
207: if(valid_options!=options->count())
1.166 misha 208: throw Exception(PARSER_RUNTIME,
1.146 paf 209: 0,
210: "called with invalid option");
211: }
1.129 paf 212:
1.146 paf 213: uint processe_file_no=file_alias?
214: r.register_file(r.absolute(*file_alias))
215: : pseudo_file_no__process;
216: // process...{string}
217: Value& vjunction=params.as_junction(index, "body must be code");
218: // evaluate source to process
219: const String& source=r.process_to_string(vjunction);
220: r.use_buf(*target_class,
1.190 ! misha 221: source.untaint_cstr(String::L_AS_IS, r.connection(false)),
1.146 paf 222: main_alias,
223: processe_file_no,
224: line_no_alias_offset);
1.1 paf 225:
1.73 paf 226: // main_method
1.129 paf 227: main_method=target_class->get_method(main_method_name);
1.73 paf 228: }
229: // after restoring current-request-lang
230: // maybe-execute @main[]
231: if(main_method) {
1.119 paf 232: // temporarily set method_frame's self to target_self
1.129 paf 233: Temp_method_frame_self tmfs(*r.get_method_frame(), *target_self);
1.73 paf 234: // execute!
235: r.execute(*main_method->parser_code);
1.1 paf 236: }
237: }
238:
1.138 paf 239: static void _rem(Request&, MethodParams& params) {
1.129 paf 240: params.as_junction(0, "body must be code");
1.1 paf 241: }
242:
1.129 paf 243: static void _while(Request& r, MethodParams& params) {
1.164 paf 244: Temp_hash_value<const String::Body, void*>
245: cycle_data_setter(r.classes_conf, cycle_data_name, /*any not null flag*/&r);
246:
1.170 misha 247: Value& vcondition=params.as_expression(0, "condition must be number, bool or expression");
248:
1.162 paf 249: Value& body_code=params.as_junction(1, "body must be code");
250: Value* delim_maybe_code=params.count()>2?¶ms[2]:0;
1.1 paf 251:
252: // while...
253: int endless_loop_count=0;
1.186 misha 254: if(delim_maybe_code){ // delimiter set
1.185 misha 255: bool need_delim=false;
256: while(true) {
257: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
258: throw Exception(PARSER_RUNTIME,
259: 0,
260: "endless loop detected");
261:
262: if(!r.process_to_value(vcondition, false/*don't intercept string*/).as_bool())
263: break;
1.1 paf 264:
1.185 misha 265: StringOrValue sv_processed=r.process(body_code);
266: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 misha 267:
1.185 misha 268: const String* s_processed=sv_processed.get_string();
1.186 misha 269: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 270: if(need_delim) // need delim & iteration produced string?
271: r.write_pass_lang(r.process(*delim_maybe_code));
272: else
273: need_delim=true;
274: }
275: r.write_pass_lang(sv_processed);
1.1 paf 276:
1.185 misha 277: if(lskip==Request::SKIP_BREAK)
278: break;
1.162 paf 279: }
1.185 misha 280: } else {
281: while(true) {
282: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
283: throw Exception(PARSER_RUNTIME,
284: 0,
285: "endless loop detected");
286:
287: if(!r.process_to_value(vcondition, false/*don't intercept string*/).as_bool())
288: break;
1.164 paf 289:
1.185 misha 290: r.process_write(body_code);
291: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
292:
293: if(lskip==Request::SKIP_BREAK)
294: break;
295: }
1.1 paf 296: }
297: }
298:
1.129 paf 299: static void _use(Request& r, MethodParams& params) {
1.171 misha 300: Value& vfile=params.as_no_junction(0, FILE_NAME_MUST_NOT_BE_CODE);
1.113 paf 301: r.use_file(r.main_class, vfile.as_string());
1.1 paf 302: }
303:
1.164 paf 304: static void set_skip(Request& r, Request::Skip askip) {
305: void* data=r.classes_conf.get(cycle_data_name);
306: if(!data)
1.166 misha 307: throw Exception(PARSER_RUNTIME,
1.164 paf 308: 0,
309: "without cycle");
310:
311: r.set_skip(askip);
312: }
313:
314: static void _break(Request& r, MethodParams&) {
315: set_skip(r, Request::SKIP_BREAK);
316: }
317:
318: static void _continue(Request& r, MethodParams&) {
319: set_skip(r, Request::SKIP_CONTINUE);
320: }
321:
1.129 paf 322: static void _for(Request& r, MethodParams& params) {
1.164 paf 323: Temp_hash_value<const String::Body, void*>
324: cycle_data_setter(r.classes_conf, cycle_data_name, /*any not null flag*/&r);
325:
1.129 paf 326: const String& var_name=params.as_string(0, "var name must be string");
327: int from=params.as_int(1, "from must be int", r);
328: int to=params.as_int(2, "to must be int", r);
1.186 misha 329: Value& body_code=params.as_junction(3, "body must be code");
1.129 paf 330: Value* delim_maybe_code=params.count()>4?¶ms[4]:0;
1.1 paf 331:
1.57 paf 332: if(to-from>=MAX_LOOPS) // too long loop?
1.166 misha 333: throw Exception(PARSER_RUNTIME,
1.129 paf 334: 0,
1.57 paf 335: "endless loop detected");
336:
1.129 paf 337: VInt* vint=new VInt(0);
1.154 paf 338:
339: VMethodFrame& caller=*r.get_method_frame()->caller();
340: caller.put_element(caller, var_name, vint, false);
1.186 misha 341: if(delim_maybe_code){ // delimiter set
1.185 misha 342: bool need_delim=false;
343:
344: for(int i=from; i<=to; i++) {
345: vint->set_int(i);
346:
347: StringOrValue sv_processed=r.process(body_code);
348: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 misha 349:
1.185 misha 350: const String* s_processed=sv_processed.get_string();
1.186 misha 351: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 352: if(need_delim) // need delim & iteration produced string?
353: r.write_pass_lang(r.process(*delim_maybe_code));
354: else
355: need_delim=true;
356: }
357: r.write_pass_lang(sv_processed);
1.1 paf 358:
1.185 misha 359: if(lskip==Request::SKIP_BREAK)
360: break;
1.1 paf 361: }
1.185 misha 362: } else {
363: for(int i=from; i<=to; i++) {
364: vint->set_int(i);
365:
366: r.process_write(body_code);
367: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.164 paf 368:
1.185 misha 369: if(lskip==Request::SKIP_BREAK)
370: break;
371: }
1.1 paf 372: }
373: }
374:
1.129 paf 375: static void _eval(Request& r, MethodParams& params) {
376: Value& expr=params.as_junction(0, "need expression");
1.1 paf 377: // evaluate expresion
1.129 paf 378: Value& value_result=r.process_to_value(expr,
1.165 misha 379: false/*don't intercept string*/).as_expr_result();
1.129 paf 380: if(params.count()>1) {
1.177 misha 381: const String& fmt=params.as_string(1, "fmt must be string").trim();
382: if(fmt.is_empty()){
383: r.write_no_lang(value_result);
384: } else {
385: r.write_no_lang(String(format(value_result.as_double(), fmt.cstrm())));
386: }
1.91 paf 387: } else
1.129 paf 388: r.write_no_lang(value_result);
1.1 paf 389: }
390:
1.129 paf 391: static void _connect(Request& r, MethodParams& params) {
1.63 paf 392: #ifdef RESOURCES_DEBUG
393: struct timeval mt[2];
394: #endif
1.129 paf 395: Value& url=params.as_no_junction(0, "url must not be code");
396: Value& body_code=params.as_junction(1, "body must be code");
1.1 paf 397:
1.129 paf 398: Table* protocol2driver_and_client=0;
399: if(Value* sql=r.main_class.get_element(String(MAIN_SQL_NAME), r.main_class, false)) {
400: if(Value* element=sql->get_element(String(MAIN_SQL_DRIVERS_NAME), *sql, false)) {
1.113 paf 401: protocol2driver_and_client=element->get_table();
402: }
403: }
1.11 paf 404:
1.63 paf 405: #ifdef RESOURCES_DEBUG
406: //measure:before
407: gettimeofday(&mt[0],NULL);
408: #endif
1.1 paf 409: // connect
1.142 paf 410: SQL_Connection* connection=SQL_driver_manager->get_connection(url.as_string(),
1.144 paf 411: protocol2driver_and_client,
1.180 misha 412: r.charsets.source().NAME().cstr(),
413: r.request_info.document_root);
1.1 paf 414:
1.63 paf 415: #ifdef RESOURCES_DEBUG
416: //measure:after connect
417: gettimeofday(&mt[1],NULL);
418:
419: double t[2];
420: for(int i=0;i<2;i++)
421: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
422:
423: r.sql_connect_time+=t[1]-t[0];
424: #endif
1.129 paf 425: Temp_connection temp_connection(r, connection);
1.1 paf 426: // execute body
1.53 parser 427: try {
1.189 misha 428: r.process_write(body_code);
1.129 paf 429: connection->commit();
430: connection->close();
1.75 paf 431: } catch(...) { // process problem
1.129 paf 432: connection->rollback();
433: connection->close();
434: rethrow;
1.1 paf 435: }
436: }
437:
1.41 parser 438: #ifndef DOXYGEN
1.129 paf 439: class Switch_data: public PA_Object {
440: public:
441: Request& r;
1.181 misha 442: const String* searching_string;
443: double searching_double;
1.129 paf 444: Value* found;
445: Value* _default;
446: public:
447: Switch_data(Request& ar, Value& asearching):
1.181 misha 448: r(ar)
449: {
450: if(asearching.is_string() || asearching.is_void()){
451: searching_string=&asearching.as_string();
452: searching_double=0;
453: } else {
454: searching_string=0;
455: searching_double=asearching.as_double();
456: }
457: }
1.28 parser 458: };
1.41 parser 459: #endif
1.129 paf 460: static void _switch(Request& r, MethodParams& params) {
461: Switch_data* data=new Switch_data(r, r.process_to_value(params[0]));
1.135 paf 462: Temp_hash_value<const String::Body, void*>
1.129 paf 463: switch_data_setter(r.classes_conf, switch_data_name, data);
1.28 parser 464:
1.129 paf 465: Value& cases_code=params.as_junction(1, "switch cases must be code");
1.82 paf 466: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
467: // because of stacked WWrapper used there as wcontext
1.84 paf 468: r.process(cases_code, true/*intercept_string*/);
1.147 paf 469: if(Value* selected_code=data->found? data->found: data->_default)
1.107 paf 470: r.write_pass_lang(r.process(*selected_code));
1.28 parser 471: }
472:
1.129 paf 473: static void _case(Request& r, MethodParams& params) {
474: Switch_data* data=static_cast<Switch_data*>(r.classes_conf.get(switch_data_name));
1.38 parser 475: if(!data)
1.166 misha 476: throw Exception(PARSER_RUNTIME,
1.129 paf 477: 0,
1.38 parser 478: "without switch");
1.28 parser 479:
1.181 misha 480: if(data->found) // matches already was found
481: return;
482:
1.129 paf 483: int count=params.count();
1.184 misha 484: Value* code=¶ms.as_expression(--count, "case result must be code");
485:
486: #ifdef USE_DESTRUCTORS
487: Junction *j=code->get_junction();
488: if (j){
489: code=new VJunction(j->self,j->method,j->method_frame,j->rcontext,j->wcontext,j->code);
490: if (j->wcontext) j->wcontext->attach_junction((VJunction *)code);
491: }
492: #endif
1.83 paf 493:
1.181 misha 494: for(int i=0; i<count; i++){
1.129 paf 495: Value& value=r.process_to_value(params[i]);
1.28 parser 496:
1.181 misha 497: if(value.is_string() && value.as_string() == CASE_DEFAULT_VALUE){
1.184 misha 498: data->_default=code;
1.181 misha 499: continue;
1.28 parser 500: }
501:
502: bool matches;
1.181 misha 503: if(data->searching_string)
504: matches=(*data->searching_string) == value.as_string();
1.28 parser 505: else
1.181 misha 506: matches=data->searching_double == value.as_double();
1.82 paf 507:
1.181 misha 508: if(matches){
1.184 misha 509: data->found=code;
1.28 parser 510: break;
511: }
512: }
513: }
1.136 paf 514: #ifndef DOXYGEN
515: struct Try_catch_result {
516: StringOrValue processed_code;
517: const String* exception_should_be_handled;
518:
519: Try_catch_result(): exception_should_be_handled(0) {}
520: };
521: #endif
522:
523: /// used by ^try and ^cache, @returns $exception.handled[string] if any
524: template<class I>
525: static Try_catch_result try_catch(Request& r,
526: StringOrValue body_code(Request&, I), I info,
1.179 misha 527: Value* catch_code,
528: bool could_be_handled_by_caller=false)
1.136 paf 529: {
530: Try_catch_result result;
1.179 misha 531:
1.136 paf 532: if(!catch_code) {
533: result.processed_code=body_code(r, info);
534: return result;
535: }
536:
537: // taking snapshot of try-context
538: Request_context_saver try_context(r);
539: try {
540: result.processed_code=body_code(r, info);
541: } catch(const Exception& e) {
542: Request_context_saver throw_context(r); // taking snapshot of throw-context [stack trace contains error]
543: Request::Exception_details details=r.get_details(e);
544: try_context.restore(); // restoring try-context to perform catch-code
545:
546: Junction* junction=catch_code->get_junction();
547: Value* method_frame=junction->method_frame;
548: Value* saved_exception_var_value=method_frame->get_element(exception_var_name, *method_frame, false);
1.154 paf 549: VMethodFrame& frame=*junction->method_frame;
550: frame.put_element(frame, exception_var_name, &details.vhash, false);
1.179 misha 551:
1.136 paf 552: result.processed_code=r.process(*catch_code);
553:
554: // retriving $exception.handled, restoring $exception var
555: Value* vhandled=details.vhash.hash().get(exception_handled_part_name);
1.154 paf 556: frame.put_element(frame, exception_var_name, saved_exception_var_value, false);
1.136 paf 557:
558: bool bhandled=false;
559: if(vhandled) {
560: if(vhandled->is_string()) { // not simple $exception.handled(1/0)?
1.160 paf 561: if(could_be_handled_by_caller) { // and we can possibly handle it
562: result.exception_should_be_handled=vhandled->get_string(); // considering 'recovered' and let the caller recover
563: return result;
564: }
565:
566: bhandled=false;
567: } else
1.179 misha 568: bhandled=vhandled->as_bool();
1.136 paf 569: }
570:
571: if(!bhandled) {
572: throw_context.restore(); // restoring throw-context [exception were not handled]
573: rethrow;
574: }
575: }
1.179 misha 576:
1.136 paf 577: return result;
578: }
1.28 parser 579:
1.63 paf 580: // cache--
581:
582: // consts
583:
1.152 paf 584: const int DATA_STRING_SERIALIZED_VERSION=0x0006;
1.63 paf 585:
586: // helper types
587:
588: #ifndef DOXYGEN
589: struct Data_string_serialized_prolog {
590: int version;
1.79 paf 591: time_t expires;
1.63 paf 592: };
593: #endif
594:
1.68 paf 595: void cache_delete(const String& file_spec) {
1.167 misha 596: file_delete(file_spec, false/*fail_on_problem*/);
1.63 paf 597: }
1.69 paf 598:
599: #ifndef DOXYGEN
1.135 paf 600: struct Cache_scope {
1.129 paf 601: public:
1.79 paf 602: time_t expires;
1.135 paf 603: const String* body_from_disk;
1.79 paf 604: };
1.69 paf 605: struct Locked_process_and_cache_put_action_info {
606: Request *r;
1.136 paf 607: Cache_scope *scope;
1.167 misha 608: Value* body_code;
609: Value* catch_code;
1.136 paf 610: const String* processed_code;
1.69 paf 611: };
612: #endif
1.136 paf 613:
614:
615:
616: static StringOrValue process_cache_body_code(Request& r, Value* body_code) {
1.153 paf 617: return StringOrValue(r.process_to_string(*body_code));
1.136 paf 618: }
619:
1.129 paf 620: /* @todo maybe network order worth spending some effort?
621: don't bothering myself with network byte order,
622: am not planning to be able to move resulting file across platforms
623: */
1.69 paf 624: static void locked_process_and_cache_put_action(int f, void *context) {
625: Locked_process_and_cache_put_action_info& info=
626: *static_cast<Locked_process_and_cache_put_action_info *>(context);
1.129 paf 627:
1.160 paf 628: const String* body_from_disk=info.scope->body_from_disk;
1.69 paf 629: // body->process
1.136 paf 630: Try_catch_result result=try_catch(*info.r,
631: process_cache_body_code, info.body_code,
1.160 paf 632: info.catch_code, body_from_disk!=0 /*we have something old=we can handle=recover later*/);
1.136 paf 633:
634: if(result.exception_should_be_handled) {
635: if(*result.exception_should_be_handled==CACHE_EXCEPTION_HANDLED_CACHE_NAME) {
1.160 paf 636: assert(body_from_disk);
637: info.processed_code=body_from_disk;
1.136 paf 638: } else
1.166 misha 639: throw Exception(PARSER_RUNTIME,
1.136 paf 640: result.exception_should_be_handled,
641: "$"EXCEPTION_VAR_NAME"."EXCEPTION_HANDLED_PART_NAME" value must be "
642: "either boolean or string '"CACHE_EXCEPTION_HANDLED_CACHE_NAME"'");
643: } else
644: info.processed_code=&result.processed_code.as_string();
1.69 paf 645:
1.79 paf 646: // expiration time not spoiled by ^cache(0) or something?
1.136 paf 647: if(info.scope->expires > time(0)) {
1.79 paf 648: // string -serialize> buffer
1.136 paf 649: String::Cm serialized=info.processed_code->serialize(
1.129 paf 650: sizeof(Data_string_serialized_prolog));
1.79 paf 651: Data_string_serialized_prolog& prolog=
1.129 paf 652: *reinterpret_cast<Data_string_serialized_prolog *>(serialized.str);
1.79 paf 653: prolog.version=DATA_STRING_SERIALIZED_VERSION;
1.136 paf 654: prolog.expires=info.scope->expires;
1.79 paf 655:
656: // buffer -write> file
1.129 paf 657: write(f, serialized.str, serialized.length);
1.79 paf 658: } else // expired!
1.136 paf 659: info.scope->expires=0; // flag it so that could be easily checked by caller
1.69 paf 660: }
1.129 paf 661: const String* locked_process_and_cache_put(Request& r,
1.128 paf 662: Value& body_code,
1.136 paf 663: Value* catch_code,
664: Cache_scope& scope,
665: const String& file_spec)
666: {
1.140 paf 667: Locked_process_and_cache_put_action_info info={&r, &scope, &body_code, catch_code, 0};
1.69 paf 668:
1.129 paf 669: const String* result=file_write_action_under_lock(
1.69 paf 670: file_spec,
1.168 misha 671: "cache_put",
672: locked_process_and_cache_put_action,
673: &info,
1.69 paf 674: false/*as_text*/,
675: false/*do_append*/,
1.173 misha 676: false/*block == don't wait till other thread release lock*/,
677: false/*dun throw exception if lock failed*/) ? info.processed_code: 0;
1.168 misha 678:
1.100 paf 679: time_t now=time(0);
1.136 paf 680: if(scope.expires<=now)
1.79 paf 681: cache_delete(file_spec);
682: return result;
1.63 paf 683: }
1.137 paf 684: #ifndef DOXYGEN
1.135 paf 685: struct Cache_get_result {
686: const String* body;
687: bool expired;
1.137 paf 688: };
689: #endif
690: static Cache_get_result cache_get(Request_charsets& charsets, const String& file_spec, time_t now) {
1.140 paf 691: Cache_get_result result={0, false};
1.135 paf 692:
1.129 paf 693: File_read_result file=file_read(charsets, file_spec,
1.63 paf 694: false/*as_text*/,
1.129 paf 695: 0, //no params
696: false/*fail_on_read_problem*/);
697: if(file.success && file.length/* ignore reads which are empty due to
1.72 paf 698: non-unary open+lockEX conflict with lockSH */) {
1.129 paf 699:
1.72 paf 700: Data_string_serialized_prolog& prolog=
1.129 paf 701: *reinterpret_cast<Data_string_serialized_prolog *>(file.str);
1.63 paf 702:
1.135 paf 703: String* body=new String;
1.72 paf 704: if(
1.129 paf 705: file.length>=sizeof(Data_string_serialized_prolog)
1.135 paf 706: && prolog.version==DATA_STRING_SERIALIZED_VERSION) {
707: if(body->deserialize(sizeof(Data_string_serialized_prolog), file.str, file.length)) {
708: result.body=body;
709: result.expired=prolog.expires <= now;
710: }
711: }
1.72 paf 712: }
1.63 paf 713:
1.135 paf 714: return result;
1.63 paf 715: }
1.129 paf 716: static time_t as_expires(Request& r, MethodParams& params,
1.79 paf 717: int index, time_t now) {
718: time_t result;
1.129 paf 719: if(Value* vdate=params[index].as(VDATE_TYPE, false))
720: result=static_cast<VDate*>(vdate)->get_time();
1.79 paf 721: else
1.129 paf 722: result=now+(time_t)params.as_double(index, "lifespan must be date or number", r);
1.79 paf 723:
724: return result;
725: }
1.129 paf 726: static const String& as_file_spec(Request& r, MethodParams& params, int index) {
727: return r.absolute(params.as_string(index, "filespec must be string"));
1.79 paf 728: }
1.129 paf 729: static void _cache(Request& r, MethodParams& params) {
1.173 misha 730: if(params.count()==0) {
731: // ^cache[] -- return current expiration time
1.158 paf 732: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
733: if(!scope)
1.166 misha 734: throw Exception(PARSER_RUNTIME,
1.158 paf 735: 0,
736: "expire-time get without cache");
737: r.write_no_lang(*new VDate(scope->expires));
738: return;
739: }
740:
1.79 paf 741: time_t now=time(0);
742:
1.129 paf 743: if(params.count()==1) {
1.173 misha 744: // ^cache[filename] ^cache(seconds) ^cache[expires date]
1.129 paf 745: if(params[0].is_string()) { // filename?
1.79 paf 746: cache_delete(as_file_spec(r, params, 0));
747: return;
748: }
749:
750: // secods|expires date
1.135 paf 751: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
752: if(!scope)
1.166 misha 753: throw Exception(PARSER_RUNTIME,
1.129 paf 754: 0,
1.79 paf 755: "expire-time reducing instruction without cache");
756:
1.129 paf 757: time_t expires=as_expires(r, params, 0, now);
1.135 paf 758: if(expires < scope->expires)
759: scope->expires=expires;
1.79 paf 760:
761: return;
1.149 paf 762: } else if(params.count()<3)
1.166 misha 763: throw Exception(PARSER_RUNTIME,
1.149 paf 764: 0,
765: "invalid number of parameters");
1.63 paf 766:
767: // file_spec, expires, body code
1.172 misha 768: const String& file_spec=as_file_spec(r, params, 0);
1.65 paf 769:
1.141 paf 770: Cache_scope scope={as_expires(r, params, 1, now), 0};
1.135 paf 771:
772: Temp_hash_value<const String::Body, void*>
773: cache_scope_setter(r.classes_conf, cache_data_name, &scope);
1.136 paf 774: Value& body_code=params.as_junction(2, "body_code must be code");
775: Value* catch_code=0;
776: if(params.count()>3)
777: catch_code=¶ms.as_junction(3, "catch_code must be code");
1.63 paf 778:
1.168 misha 779: if(scope.expires>now) {
780: Cache_get_result cached=cache_get(r.charsets, file_spec, now);
1.69 paf 781:
1.168 misha 782: if(cached.body) { // have cached copy
1.174 misha 783: if(cached.expired) {
784: scope.body_from_disk=cached.body; // storing for user to retrive it with ^cache[]
785: } else {
786: // and it's not expired yet write it out
1.168 misha 787: r.write_assign_lang(*cached.body);
788: // happy with it
789: return;
790: }
791: }
792:
793: // no cached info or it's already expired
1.173 misha 794:
795: // trying to process it under lock and store result in file
1.174 misha 796: const String* processed_body=locked_process_and_cache_put(r, body_code, catch_code, scope, file_spec);
1.173 misha 797: if(processed_body){
1.174 misha 798: // write it out
799: r.write_assign_lang(*processed_body);
800: // happy with it
801: return;
1.173 misha 802: } else {
803: // we fail while get exclusive lock. nvm, we just execute body_code a bit later
1.174 misha 804: }
1.69 paf 805: } else {
1.79 paf 806: // instructed not to cache; forget cached copy
1.68 paf 807: cache_delete(file_spec);
1.69 paf 808: }
1.168 misha 809:
810: // process without cacheing
811: const String& processed_body=r.process_to_string(body_code);
812: // write it out
813: r.write_assign_lang(processed_body);
1.63 paf 814: }
815:
1.136 paf 816: static StringOrValue process_try_body_code(Request& r, Value* body_code) {
817: return r.process(*body_code);
818: }
1.129 paf 819: static void _try_operator(Request& r, MethodParams& params) {
820: Value& body_code=params.as_junction(0, "body_code must be code");
821: Value& catch_code=params.as_junction(1, "catch_code must be code");
1.179 misha 822: Value* finally_code=(params.count()==3) ? ¶ms.as_junction(2, "finally_code must be code") : 0;
823:
824: Try_catch_result result;
825: StringOrValue finally_result;
826: try{
827: result=try_catch(r,
828: process_try_body_code, &body_code,
829: &catch_code);
830: if(result.exception_should_be_handled)
831: throw Exception(PARSER_RUNTIME,
832: result.exception_should_be_handled,
833: "catch block must set $exception.handled to some boolean value, not string");
834: } catch(...){
835: if(finally_code)
836: finally_result=r.process(*finally_code);
837: rethrow;
838: }
1.74 paf 839:
1.179 misha 840: if(finally_code)
841: finally_result=r.process(*finally_code);
1.123 paf 842:
1.136 paf 843: // write out processed body_code or catch_code
844: r.write_pass_lang(result.processed_code);
1.179 misha 845:
846: // write out processed finally code
847: if(finally_code)
848: r.write_pass_lang(finally_result);
1.74 paf 849: }
850:
1.138 paf 851: static void _throw_operator(Request&, MethodParams& params) {
1.178 misha 852: if(params.count()==1 && !params[0].is_string()) {
1.129 paf 853: if(HashStringValue *hash=params[0].get_hash()) {
854: const char* type=0;
855: if(Value* value=hash->get(exception_type_part_name))
1.78 paf 856: type=value->as_string().cstr();
1.129 paf 857: const String* source=0;
858: if(Value* value=hash->get(exception_source_part_name))
1.74 paf 859: source=&value->as_string();
1.138 paf 860: const char* comment=0;
1.129 paf 861: if(Value* value=hash->get(exception_comment_part_name))
1.74 paf 862: comment=value->as_string().cstr();
863:
1.78 paf 864: throw Exception(type,
1.129 paf 865: source?source:0,
866: "%s", comment?comment:"");
1.74 paf 867: } else
1.166 misha 868: throw Exception(PARSER_RUNTIME,
1.129 paf 869: 0,
1.178 misha 870: "one-param version has hash or string param");
1.74 paf 871: } else {
1.129 paf 872: const char* type=params.as_string(0, "type must be string").cstr();
1.178 misha 873: const String* source=params.count()>1? ¶ms.as_string(1, "source must be string"):0;
874: const char* comment=params.count()>2? params.as_string(2, "comment must be string").cstr():0;
875: throw Exception(type, source, "%s", comment?comment:"");
1.74 paf 876: }
1.132 paf 877: }
1.129 paf 878:
1.150 paf 879: static void _sleep_operator(Request& r, MethodParams& params) {
880: double seconds=params.as_double(0, "seconds must be double", r);
1.151 paf 881: pa_sleep((int)trunc(seconds), (int)trunc(seconds*1000));
1.150 paf 882: }
883:
1.129 paf 884: #if defined(WIN32) && defined(_DEBUG)
885: # define PA_BPT
1.138 paf 886: static void _bpt(Request&, MethodParams&) {
1.129 paf 887: _asm int 3;
888: }
889: #endif
890:
1.10 paf 891: // constructor
892:
1.129 paf 893: VClassMAIN::VClassMAIN(): VClass() {
894: set_name(*new String(MAIN_CLASS_NAME));
895:
896: #ifdef PA_BPT
897: // ^bpt[]
898: add_native_method("bpt", Method::CT_ANY, _bpt, 0, 0);
899: #endif
1.121 paf 900:
1.1 paf 901: // ^if(condition){code-when-true}
902: // ^if(condition){code-when-true}{code-when-false}
1.185 misha 903: add_native_method("if", Method::CT_ANY, _if, 2, 3, Method::CO_WITHOUT_FRAME);
1.1 paf 904:
1.185 misha 905: // ^untaint[as-is|uri|sql|js|html|html-typo|regex]{code}
1.188 misha 906: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2);
1.1 paf 907:
1.185 misha 908: // ^taint[as-is|uri|sql|js|html|html-typo|regex]{code}
1.188 misha 909: add_native_method("taint", Method::CT_ANY, _taint, 1, 2);
1.1 paf 910:
911: // ^process[code]
1.146 paf 912: add_native_method("process", Method::CT_ANY, _process, 1, 3);
1.1 paf 913:
914: // ^rem{code}
1.185 misha 915: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 916:
917: // ^while(condition){code}
1.185 misha 918: add_native_method("while", Method::CT_ANY, _while, 2, 3, Method::CO_WITHOUT_FRAME);
1.1 paf 919:
920: // ^use[file]
1.10 paf 921: add_native_method("use", Method::CT_ANY, _use, 1, 1);
1.1 paf 922:
1.164 paf 923: // ^break[]
1.185 misha 924: add_native_method("break", Method::CT_ANY, _break, 0, 0, Method::CO_WITHOUT_FRAME);
925:
1.164 paf 926: // ^continue[]
1.185 misha 927: add_native_method("continue", Method::CT_ANY, _continue, 0, 0, Method::CO_WITHOUT_FRAME);
928:
1.54 paf 929: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.185 misha 930: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1, Method::CO_WITHOUT_WCONTEXT);
1.1 paf 931:
932: // ^eval(expr)
933: // ^eval(expr)[format]
1.185 misha 934: add_native_method("eval", Method::CT_ANY, _eval, 1, 2, Method::CO_WITHOUT_FRAME);
1.52 parser 935:
1.1 paf 936: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 937: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
938:
1.63 paf 939:
1.136 paf 940: // ^cache[file_spec](time){code}[{catch code}] time=0 no cache
1.65 paf 941: // ^cache[file_spec] delete cache
1.161 paf 942: // ^cache[] get current expiration time
943: add_native_method("cache", Method::CT_ANY, _cache, 0, 4);
1.63 paf 944:
1.28 parser 945: // switch
946:
947: // ^switch[value]{cases}
1.185 misha 948: add_native_method("switch", Method::CT_ANY, _switch, 2, 2, Method::CO_WITHOUT_FRAME);
1.28 parser 949:
950: // ^case[value]{code}
1.185 misha 951: add_native_method("case", Method::CT_ANY, _case, 2, 10000, Method::CO_WITHOUT_FRAME);
1.74 paf 952:
953: // try-catch
954:
955: // ^try{code}{catch code}
1.185 misha 956: add_native_method("try", Method::CT_ANY, _try_operator, 2, 3, Method::CO_WITHOUT_FRAME);
1.74 paf 957: // ^throw[$exception hash]
958: // ^throw[type;source;comment]
959: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
960:
1.150 paf 961: add_native_method("sleep", Method::CT_ANY, _sleep_operator, 1, 1);
1.10 paf 962: }
1.11 paf 963:
964: // constructor & configurator
1.1 paf 965:
1.129 paf 966: VStateless_class& VClassMAIN_create() {
967: return *new VClassMAIN;
1.1 paf 968: }
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