Annotation of parser3/src/classes/op.C, revision 1.198
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:
1.198 ! misha 8: static const char * const IDENT_OP_C="$Date: 2009-08-08 13:30:20 $";
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:
1.129 paf 41: // defines for statics
42:
43: #define SWITCH_DATA_NAME "SWITCH-DATA"
44: #define CACHE_DATA_NAME "CACHE-DATA"
1.164 paf 45:
1.129 paf 46: #define EXCEPTION_VAR_NAME "exception"
47:
48: // statics
49:
50: //^switch ^case
51: static const String switch_data_name(SWITCH_DATA_NAME);
52: //^cache
53: static const String cache_data_name(CACHE_DATA_NAME);
54:
55: static const String exception_var_name(EXCEPTION_VAR_NAME);
56:
1.164 paf 57:
1.136 paf 58: // local defines
59:
60: #define CACHE_EXCEPTION_HANDLED_CACHE_NAME "cache"
61:
1.129 paf 62: // helpers
63:
1.187 misha 64: class Untaint_lang_name2enum: public HashString<String::Language> {
1.129 paf 65: public:
66: Untaint_lang_name2enum() {
67: #define ULN(name, LANG) \
1.130 paf 68: put(String::Body(name), (value_type)(String::L_##LANG));
1.198 ! misha 69: ULN("clean", CLEAN);
1.129 paf 70: ULN("as-is", AS_IS);
71: ULN("optimized-as-is", AS_IS|String::L_OPTIMIZE_BIT);
72: ULN("file-spec", FILE_SPEC);
73: ULN("http-header", HTTP_HEADER);
74: ULN("mail-header", MAIL_HEADER);
75: ULN("uri", URI);
76: ULN("sql", SQL);
77: ULN("js", JS);
78: ULN("xml", XML);
79: ULN("optimized-xml", XML|String::L_OPTIMIZE_BIT);
80: ULN("html", HTML);
81: ULN("optimized-html", HTML|String::L_OPTIMIZE_BIT);
1.159 paf 82: ULN("regex", REGEX);
1.193 misha 83: ULN("parser-code", PARSER_CODE);
1.129 paf 84: #undef ULN
85: }
86: } untaint_lang_name2enum;
87:
1.10 paf 88: // methods
89:
1.129 paf 90: static void _if(Request& r, MethodParams& params) {
1.156 paf 91: bool condition=params.as_bool(0, "condition must be expression", r);
1.6 paf 92: if(condition)
1.185 misha 93: r.process_write(*params.get(1));
1.129 paf 94: else if(params.count()>2)
1.185 misha 95: r.process_write(*params.get(2));
1.1 paf 96: }
97:
1.175 misha 98: static String::Language get_untaint_lang(MethodParams& params, int index){
99: const String& lang_name=params.as_string(index, "lang must be string");
100: String::Language lang=untaint_lang_name2enum.get(lang_name);
101: if(!lang)
1.183 misha 102: throw Exception(PARSER_RUNTIME,
1.175 misha 103: &lang_name,
104: "invalid taint language");
105: return lang;
106: }
107:
1.129 paf 108: static void _untaint(Request& r, MethodParams& params) {
109: String::Language lang;
110: if(params.count()==1)
1.175 misha 111: lang=String::L_AS_IS; // mark as simply 'as-is'. useful in html from sql
112: else
113: lang=get_untaint_lang(params, 0);
1.1 paf 114:
115: {
1.129 paf 116: Value& vbody=params.as_junction(params.count()-1, "body must be code");
1.1 paf 117:
1.191 misha 118: Temp_lang temp_lang(r, lang); // set temporarily specified ^untaint[language;
119: StringOrValue result=r.process(vbody); // process marking tainted with that lang
1.188 misha 120: r.write_assign_lang(result);
1.1 paf 121: }
122: }
123:
1.129 paf 124: static void _taint(Request& r, MethodParams& params) {
125: String::Language lang;
126: if(params.count()==1)
1.175 misha 127: lang=String::L_TAINTED; // mark as simply 'tainted'. useful in table:create
128: else
129: lang=get_untaint_lang(params, 0);
1.1 paf 130:
131: {
1.129 paf 132: Value& vbody=params.as_no_junction(params.count()-1, "body must not be code");
1.1 paf 133:
1.191 misha 134: String result(vbody.as_string(), lang); // force result language to specified
1.188 misha 135: r.write_assign_lang(result);
1.1 paf 136: }
137: }
138:
1.129 paf 139: static void _process(Request& r, MethodParams& params) {
140: Method* main_method;
141:
142: size_t index=0;
143: Value* target_self;
144: Value& maybe_target_self=params[index];
145: if(maybe_target_self.get_string() || maybe_target_self.get_junction())
146: target_self=&r.get_method_frame()->caller()->self();
147: else {
148: target_self=&maybe_target_self; index++;
149: }
150:
1.1 paf 151: {
1.197 misha 152: VStateless_class *target_class=target_self->get_class();
1.116 paf 153: if(!target_class)
1.166 misha 154: throw Exception(PARSER_RUNTIME,
1.129 paf 155: 0,
1.116 paf 156: "no target class");
1.114 paf 157:
1.73 paf 158: // temporary remove language change
1.192 misha 159: Temp_lang temp_lang(r, String::L_PARSER_CODE);
1.1 paf 160: // temporary zero @main so to maybe-replace it in processed code
1.129 paf 161: Temp_method temp_method_main(*target_class, main_method_name, 0);
1.1 paf 162: // temporary zero @auto so it wouldn't be auto-called in Request::use_buf
1.129 paf 163: Temp_method temp_method_auto(*target_class, auto_method_name, 0);
164:
1.146 paf 165: size_t options_index=index+1;
166: HashStringValue* options=0;
167: if(options_index<params.count()) {
1.195 misha 168: Value& voptions=params.as_no_junction(options_index, OPTIONS_MUST_NOT_BE_CODE);
1.146 paf 169: options=voptions.get_hash();
170: if(!options)
1.166 misha 171: throw Exception(PARSER_RUNTIME,
1.146 paf 172: 0,
173: "options must be hash");
174: }
175:
1.129 paf 176: const String* main_alias=0;
1.146 paf 177: const String* file_alias=0;
178: int line_no_alias_offset=0;
179: if(options) {
180: int valid_options=0;
181: if(Value* vmain_alias=options->get(PROCESS_MAIN_OPTION_NAME)) {
182: valid_options++;
183: main_alias=&vmain_alias->as_string();
184: }
185: if(Value* vfile_alias=options->get(PROCESS_FILE_OPTION_NAME)) {
186: valid_options++;
187: file_alias=&vfile_alias->as_string();
188: }
189: if(Value* vline_no_alias_offset=options->get(PROCESS_LINENO_OPTION_NAME)) {
190: valid_options++;
191: line_no_alias_offset=vline_no_alias_offset->as_int();
192: }
193:
194: if(valid_options!=options->count())
1.166 misha 195: throw Exception(PARSER_RUNTIME,
1.146 paf 196: 0,
197: "called with invalid option");
198: }
1.129 paf 199:
1.146 paf 200: uint processe_file_no=file_alias?
201: r.register_file(r.absolute(*file_alias))
202: : pseudo_file_no__process;
203: // process...{string}
204: Value& vjunction=params.as_junction(index, "body must be code");
205: // evaluate source to process
206: const String& source=r.process_to_string(vjunction);
207: r.use_buf(*target_class,
1.190 misha 208: source.untaint_cstr(String::L_AS_IS, r.connection(false)),
1.146 paf 209: main_alias,
210: processe_file_no,
211: line_no_alias_offset);
1.1 paf 212:
1.73 paf 213: // main_method
1.129 paf 214: main_method=target_class->get_method(main_method_name);
1.73 paf 215: }
216: // after restoring current-request-lang
217: // maybe-execute @main[]
218: if(main_method) {
1.119 paf 219: // temporarily set method_frame's self to target_self
1.129 paf 220: Temp_method_frame_self tmfs(*r.get_method_frame(), *target_self);
1.73 paf 221: // execute!
222: r.execute(*main_method->parser_code);
1.1 paf 223: }
224: }
225:
1.138 paf 226: static void _rem(Request&, MethodParams& params) {
1.129 paf 227: params.as_junction(0, "body must be code");
1.1 paf 228: }
229:
1.129 paf 230: static void _while(Request& r, MethodParams& params) {
1.196 misha 231: InCycle temp(r);
1.164 paf 232:
1.170 misha 233: Value& vcondition=params.as_expression(0, "condition must be number, bool or expression");
234:
1.162 paf 235: Value& body_code=params.as_junction(1, "body must be code");
236: Value* delim_maybe_code=params.count()>2?¶ms[2]:0;
1.1 paf 237:
238: // while...
239: int endless_loop_count=0;
1.186 misha 240: if(delim_maybe_code){ // delimiter set
1.185 misha 241: bool need_delim=false;
242: while(true) {
243: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
244: throw Exception(PARSER_RUNTIME,
245: 0,
246: "endless loop detected");
247:
248: if(!r.process_to_value(vcondition, false/*don't intercept string*/).as_bool())
249: break;
1.1 paf 250:
1.185 misha 251: StringOrValue sv_processed=r.process(body_code);
252: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 misha 253:
1.185 misha 254: const String* s_processed=sv_processed.get_string();
1.186 misha 255: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 256: if(need_delim) // need delim & iteration produced string?
257: r.write_pass_lang(r.process(*delim_maybe_code));
258: else
259: need_delim=true;
260: }
261: r.write_pass_lang(sv_processed);
1.1 paf 262:
1.185 misha 263: if(lskip==Request::SKIP_BREAK)
264: break;
1.162 paf 265: }
1.185 misha 266: } else {
267: while(true) {
268: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
269: throw Exception(PARSER_RUNTIME,
270: 0,
271: "endless loop detected");
272:
273: if(!r.process_to_value(vcondition, false/*don't intercept string*/).as_bool())
274: break;
1.164 paf 275:
1.185 misha 276: r.process_write(body_code);
277: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
278:
279: if(lskip==Request::SKIP_BREAK)
280: break;
281: }
1.1 paf 282: }
283: }
284:
1.129 paf 285: static void _use(Request& r, MethodParams& params) {
1.171 misha 286: Value& vfile=params.as_no_junction(0, FILE_NAME_MUST_NOT_BE_CODE);
1.113 paf 287: r.use_file(r.main_class, vfile.as_string());
1.1 paf 288: }
289:
1.164 paf 290: static void set_skip(Request& r, Request::Skip askip) {
1.196 misha 291: if(!r.get_in_cycle())
1.166 misha 292: throw Exception(PARSER_RUNTIME,
1.164 paf 293: 0,
294: "without cycle");
295:
296: r.set_skip(askip);
297: }
298:
299: static void _break(Request& r, MethodParams&) {
300: set_skip(r, Request::SKIP_BREAK);
301: }
302:
303: static void _continue(Request& r, MethodParams&) {
304: set_skip(r, Request::SKIP_CONTINUE);
305: }
306:
1.129 paf 307: static void _for(Request& r, MethodParams& params) {
1.196 misha 308: InCycle temp(r);
1.164 paf 309:
1.129 paf 310: const String& var_name=params.as_string(0, "var name must be string");
311: int from=params.as_int(1, "from must be int", r);
312: int to=params.as_int(2, "to must be int", r);
1.186 misha 313: Value& body_code=params.as_junction(3, "body must be code");
1.129 paf 314: Value* delim_maybe_code=params.count()>4?¶ms[4]:0;
1.1 paf 315:
1.57 paf 316: if(to-from>=MAX_LOOPS) // too long loop?
1.166 misha 317: throw Exception(PARSER_RUNTIME,
1.129 paf 318: 0,
1.57 paf 319: "endless loop detected");
320:
1.129 paf 321: VInt* vint=new VInt(0);
1.154 paf 322:
323: VMethodFrame& caller=*r.get_method_frame()->caller();
1.197 misha 324: caller.put_element(var_name, vint, false);
1.186 misha 325: if(delim_maybe_code){ // delimiter set
1.185 misha 326: bool need_delim=false;
327:
328: for(int i=from; i<=to; i++) {
329: vint->set_int(i);
330:
331: StringOrValue sv_processed=r.process(body_code);
332: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 misha 333:
1.185 misha 334: const String* s_processed=sv_processed.get_string();
1.186 misha 335: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 336: if(need_delim) // need delim & iteration produced string?
337: r.write_pass_lang(r.process(*delim_maybe_code));
338: else
339: need_delim=true;
340: }
341: r.write_pass_lang(sv_processed);
1.1 paf 342:
1.185 misha 343: if(lskip==Request::SKIP_BREAK)
344: break;
1.1 paf 345: }
1.185 misha 346: } else {
347: for(int i=from; i<=to; i++) {
348: vint->set_int(i);
349:
350: r.process_write(body_code);
351: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.164 paf 352:
1.185 misha 353: if(lskip==Request::SKIP_BREAK)
354: break;
355: }
1.1 paf 356: }
357: }
358:
1.129 paf 359: static void _eval(Request& r, MethodParams& params) {
360: Value& expr=params.as_junction(0, "need expression");
1.1 paf 361: // evaluate expresion
1.129 paf 362: Value& value_result=r.process_to_value(expr,
1.165 misha 363: false/*don't intercept string*/).as_expr_result();
1.129 paf 364: if(params.count()>1) {
1.177 misha 365: const String& fmt=params.as_string(1, "fmt must be string").trim();
366: if(fmt.is_empty()){
367: r.write_no_lang(value_result);
368: } else {
369: r.write_no_lang(String(format(value_result.as_double(), fmt.cstrm())));
370: }
1.91 paf 371: } else
1.129 paf 372: r.write_no_lang(value_result);
1.1 paf 373: }
374:
1.129 paf 375: static void _connect(Request& r, MethodParams& params) {
1.63 paf 376: #ifdef RESOURCES_DEBUG
377: struct timeval mt[2];
378: #endif
1.129 paf 379: Value& url=params.as_no_junction(0, "url must not be code");
380: Value& body_code=params.as_junction(1, "body must be code");
1.1 paf 381:
1.129 paf 382: Table* protocol2driver_and_client=0;
1.197 misha 383: if(Value* sql=r.main_class.get_element(String(MAIN_SQL_NAME))) {
384: if(Value* element=sql->get_element(String(MAIN_SQL_DRIVERS_NAME))) {
1.113 paf 385: protocol2driver_and_client=element->get_table();
386: }
387: }
1.11 paf 388:
1.63 paf 389: #ifdef RESOURCES_DEBUG
390: //measure:before
391: gettimeofday(&mt[0],NULL);
392: #endif
1.1 paf 393: // connect
1.142 paf 394: SQL_Connection* connection=SQL_driver_manager->get_connection(url.as_string(),
1.144 paf 395: protocol2driver_and_client,
1.180 misha 396: r.charsets.source().NAME().cstr(),
397: r.request_info.document_root);
1.1 paf 398:
1.63 paf 399: #ifdef RESOURCES_DEBUG
400: //measure:after connect
401: gettimeofday(&mt[1],NULL);
402:
403: double t[2];
404: for(int i=0;i<2;i++)
405: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
406:
407: r.sql_connect_time+=t[1]-t[0];
408: #endif
1.129 paf 409: Temp_connection temp_connection(r, connection);
1.1 paf 410: // execute body
1.53 parser 411: try {
1.189 misha 412: r.process_write(body_code);
1.129 paf 413: connection->commit();
414: connection->close();
1.75 paf 415: } catch(...) { // process problem
1.129 paf 416: connection->rollback();
417: connection->close();
418: rethrow;
1.1 paf 419: }
420: }
421:
1.41 parser 422: #ifndef DOXYGEN
1.129 paf 423: class Switch_data: public PA_Object {
424: public:
425: Request& r;
1.181 misha 426: const String* searching_string;
427: double searching_double;
1.129 paf 428: Value* found;
429: Value* _default;
430: public:
431: Switch_data(Request& ar, Value& asearching):
1.181 misha 432: r(ar)
433: {
434: if(asearching.is_string() || asearching.is_void()){
435: searching_string=&asearching.as_string();
436: searching_double=0;
437: } else {
438: searching_string=0;
439: searching_double=asearching.as_double();
440: }
441: }
1.28 parser 442: };
1.41 parser 443: #endif
1.129 paf 444: static void _switch(Request& r, MethodParams& params) {
445: Switch_data* data=new Switch_data(r, r.process_to_value(params[0]));
1.135 paf 446: Temp_hash_value<const String::Body, void*>
1.129 paf 447: switch_data_setter(r.classes_conf, switch_data_name, data);
1.28 parser 448:
1.129 paf 449: Value& cases_code=params.as_junction(1, "switch cases must be code");
1.82 paf 450: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
451: // because of stacked WWrapper used there as wcontext
1.84 paf 452: r.process(cases_code, true/*intercept_string*/);
1.147 paf 453: if(Value* selected_code=data->found? data->found: data->_default)
1.107 paf 454: r.write_pass_lang(r.process(*selected_code));
1.28 parser 455: }
456:
1.129 paf 457: static void _case(Request& r, MethodParams& params) {
458: Switch_data* data=static_cast<Switch_data*>(r.classes_conf.get(switch_data_name));
1.38 parser 459: if(!data)
1.166 misha 460: throw Exception(PARSER_RUNTIME,
1.129 paf 461: 0,
1.38 parser 462: "without switch");
1.28 parser 463:
1.181 misha 464: if(data->found) // matches already was found
465: return;
466:
1.129 paf 467: int count=params.count();
1.184 misha 468: Value* code=¶ms.as_expression(--count, "case result must be code");
469:
470: #ifdef USE_DESTRUCTORS
471: Junction *j=code->get_junction();
472: if (j){
473: code=new VJunction(j->self,j->method,j->method_frame,j->rcontext,j->wcontext,j->code);
474: if (j->wcontext) j->wcontext->attach_junction((VJunction *)code);
475: }
476: #endif
1.83 paf 477:
1.181 misha 478: for(int i=0; i<count; i++){
1.129 paf 479: Value& value=r.process_to_value(params[i]);
1.28 parser 480:
1.181 misha 481: if(value.is_string() && value.as_string() == CASE_DEFAULT_VALUE){
1.184 misha 482: data->_default=code;
1.181 misha 483: continue;
1.28 parser 484: }
485:
486: bool matches;
1.181 misha 487: if(data->searching_string)
488: matches=(*data->searching_string) == value.as_string();
1.28 parser 489: else
1.181 misha 490: matches=data->searching_double == value.as_double();
1.82 paf 491:
1.181 misha 492: if(matches){
1.184 misha 493: data->found=code;
1.28 parser 494: break;
495: }
496: }
497: }
1.136 paf 498: #ifndef DOXYGEN
499: struct Try_catch_result {
500: StringOrValue processed_code;
501: const String* exception_should_be_handled;
502:
503: Try_catch_result(): exception_should_be_handled(0) {}
504: };
505: #endif
506:
507: /// used by ^try and ^cache, @returns $exception.handled[string] if any
508: template<class I>
509: static Try_catch_result try_catch(Request& r,
510: StringOrValue body_code(Request&, I), I info,
1.179 misha 511: Value* catch_code,
512: bool could_be_handled_by_caller=false)
1.136 paf 513: {
514: Try_catch_result result;
1.179 misha 515:
1.136 paf 516: if(!catch_code) {
517: result.processed_code=body_code(r, info);
518: return result;
519: }
520:
521: // taking snapshot of try-context
522: Request_context_saver try_context(r);
523: try {
524: result.processed_code=body_code(r, info);
525: } catch(const Exception& e) {
526: Request_context_saver throw_context(r); // taking snapshot of throw-context [stack trace contains error]
527: Request::Exception_details details=r.get_details(e);
528: try_context.restore(); // restoring try-context to perform catch-code
529:
530: Junction* junction=catch_code->get_junction();
531: Value* method_frame=junction->method_frame;
1.197 misha 532: Value* saved_exception_var_value=method_frame->get_element(exception_var_name);
1.154 paf 533: VMethodFrame& frame=*junction->method_frame;
1.197 misha 534: frame.put_element(exception_var_name, &details.vhash, false);
1.179 misha 535:
1.136 paf 536: result.processed_code=r.process(*catch_code);
537:
538: // retriving $exception.handled, restoring $exception var
539: Value* vhandled=details.vhash.hash().get(exception_handled_part_name);
1.197 misha 540: frame.put_element(exception_var_name, saved_exception_var_value, false);
1.136 paf 541:
542: bool bhandled=false;
543: if(vhandled) {
544: if(vhandled->is_string()) { // not simple $exception.handled(1/0)?
1.160 paf 545: if(could_be_handled_by_caller) { // and we can possibly handle it
546: result.exception_should_be_handled=vhandled->get_string(); // considering 'recovered' and let the caller recover
547: return result;
548: }
549:
550: bhandled=false;
551: } else
1.179 misha 552: bhandled=vhandled->as_bool();
1.136 paf 553: }
554:
555: if(!bhandled) {
556: throw_context.restore(); // restoring throw-context [exception were not handled]
557: rethrow;
558: }
559: }
1.179 misha 560:
1.136 paf 561: return result;
562: }
1.28 parser 563:
1.63 paf 564: // cache--
565:
566: // consts
567:
1.152 paf 568: const int DATA_STRING_SERIALIZED_VERSION=0x0006;
1.63 paf 569:
570: // helper types
571:
572: #ifndef DOXYGEN
573: struct Data_string_serialized_prolog {
574: int version;
1.79 paf 575: time_t expires;
1.63 paf 576: };
577: #endif
578:
1.68 paf 579: void cache_delete(const String& file_spec) {
1.167 misha 580: file_delete(file_spec, false/*fail_on_problem*/);
1.63 paf 581: }
1.69 paf 582:
583: #ifndef DOXYGEN
1.135 paf 584: struct Cache_scope {
1.129 paf 585: public:
1.79 paf 586: time_t expires;
1.135 paf 587: const String* body_from_disk;
1.79 paf 588: };
1.69 paf 589: struct Locked_process_and_cache_put_action_info {
590: Request *r;
1.136 paf 591: Cache_scope *scope;
1.167 misha 592: Value* body_code;
593: Value* catch_code;
1.136 paf 594: const String* processed_code;
1.69 paf 595: };
596: #endif
1.136 paf 597:
598:
599:
600: static StringOrValue process_cache_body_code(Request& r, Value* body_code) {
1.153 paf 601: return StringOrValue(r.process_to_string(*body_code));
1.136 paf 602: }
603:
1.129 paf 604: /* @todo maybe network order worth spending some effort?
605: don't bothering myself with network byte order,
606: am not planning to be able to move resulting file across platforms
607: */
1.69 paf 608: static void locked_process_and_cache_put_action(int f, void *context) {
609: Locked_process_and_cache_put_action_info& info=
610: *static_cast<Locked_process_and_cache_put_action_info *>(context);
1.129 paf 611:
1.160 paf 612: const String* body_from_disk=info.scope->body_from_disk;
1.69 paf 613: // body->process
1.136 paf 614: Try_catch_result result=try_catch(*info.r,
615: process_cache_body_code, info.body_code,
1.160 paf 616: info.catch_code, body_from_disk!=0 /*we have something old=we can handle=recover later*/);
1.136 paf 617:
618: if(result.exception_should_be_handled) {
619: if(*result.exception_should_be_handled==CACHE_EXCEPTION_HANDLED_CACHE_NAME) {
1.160 paf 620: assert(body_from_disk);
621: info.processed_code=body_from_disk;
1.136 paf 622: } else
1.166 misha 623: throw Exception(PARSER_RUNTIME,
1.136 paf 624: result.exception_should_be_handled,
625: "$"EXCEPTION_VAR_NAME"."EXCEPTION_HANDLED_PART_NAME" value must be "
626: "either boolean or string '"CACHE_EXCEPTION_HANDLED_CACHE_NAME"'");
627: } else
628: info.processed_code=&result.processed_code.as_string();
1.69 paf 629:
1.79 paf 630: // expiration time not spoiled by ^cache(0) or something?
1.136 paf 631: if(info.scope->expires > time(0)) {
1.79 paf 632: // string -serialize> buffer
1.136 paf 633: String::Cm serialized=info.processed_code->serialize(
1.129 paf 634: sizeof(Data_string_serialized_prolog));
1.79 paf 635: Data_string_serialized_prolog& prolog=
1.129 paf 636: *reinterpret_cast<Data_string_serialized_prolog *>(serialized.str);
1.79 paf 637: prolog.version=DATA_STRING_SERIALIZED_VERSION;
1.136 paf 638: prolog.expires=info.scope->expires;
1.79 paf 639:
640: // buffer -write> file
1.129 paf 641: write(f, serialized.str, serialized.length);
1.79 paf 642: } else // expired!
1.136 paf 643: info.scope->expires=0; // flag it so that could be easily checked by caller
1.69 paf 644: }
1.129 paf 645: const String* locked_process_and_cache_put(Request& r,
1.128 paf 646: Value& body_code,
1.136 paf 647: Value* catch_code,
648: Cache_scope& scope,
649: const String& file_spec)
650: {
1.140 paf 651: Locked_process_and_cache_put_action_info info={&r, &scope, &body_code, catch_code, 0};
1.69 paf 652:
1.129 paf 653: const String* result=file_write_action_under_lock(
1.69 paf 654: file_spec,
1.168 misha 655: "cache_put",
656: locked_process_and_cache_put_action,
657: &info,
1.69 paf 658: false/*as_text*/,
659: false/*do_append*/,
1.173 misha 660: false/*block == don't wait till other thread release lock*/,
661: false/*dun throw exception if lock failed*/) ? info.processed_code: 0;
1.168 misha 662:
1.100 paf 663: time_t now=time(0);
1.136 paf 664: if(scope.expires<=now)
1.79 paf 665: cache_delete(file_spec);
666: return result;
1.63 paf 667: }
1.137 paf 668: #ifndef DOXYGEN
1.135 paf 669: struct Cache_get_result {
670: const String* body;
671: bool expired;
1.137 paf 672: };
673: #endif
674: static Cache_get_result cache_get(Request_charsets& charsets, const String& file_spec, time_t now) {
1.140 paf 675: Cache_get_result result={0, false};
1.135 paf 676:
1.129 paf 677: File_read_result file=file_read(charsets, file_spec,
1.63 paf 678: false/*as_text*/,
1.129 paf 679: 0, //no params
680: false/*fail_on_read_problem*/);
681: if(file.success && file.length/* ignore reads which are empty due to
1.72 paf 682: non-unary open+lockEX conflict with lockSH */) {
1.129 paf 683:
1.72 paf 684: Data_string_serialized_prolog& prolog=
1.129 paf 685: *reinterpret_cast<Data_string_serialized_prolog *>(file.str);
1.63 paf 686:
1.135 paf 687: String* body=new String;
1.72 paf 688: if(
1.129 paf 689: file.length>=sizeof(Data_string_serialized_prolog)
1.135 paf 690: && prolog.version==DATA_STRING_SERIALIZED_VERSION) {
691: if(body->deserialize(sizeof(Data_string_serialized_prolog), file.str, file.length)) {
692: result.body=body;
693: result.expired=prolog.expires <= now;
694: }
695: }
1.72 paf 696: }
1.63 paf 697:
1.135 paf 698: return result;
1.63 paf 699: }
1.129 paf 700: static time_t as_expires(Request& r, MethodParams& params,
1.79 paf 701: int index, time_t now) {
702: time_t result;
1.197 misha 703: if(Value* vdate=params[index].as(VDATE_TYPE))
1.129 paf 704: result=static_cast<VDate*>(vdate)->get_time();
1.79 paf 705: else
1.129 paf 706: result=now+(time_t)params.as_double(index, "lifespan must be date or number", r);
1.79 paf 707:
708: return result;
709: }
1.129 paf 710: static const String& as_file_spec(Request& r, MethodParams& params, int index) {
711: return r.absolute(params.as_string(index, "filespec must be string"));
1.79 paf 712: }
1.129 paf 713: static void _cache(Request& r, MethodParams& params) {
1.173 misha 714: if(params.count()==0) {
715: // ^cache[] -- return current expiration time
1.158 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,
1.158 paf 719: 0,
720: "expire-time get without cache");
721: r.write_no_lang(*new VDate(scope->expires));
722: return;
723: }
724:
1.79 paf 725: time_t now=time(0);
726:
1.129 paf 727: if(params.count()==1) {
1.173 misha 728: // ^cache[filename] ^cache(seconds) ^cache[expires date]
1.129 paf 729: if(params[0].is_string()) { // filename?
1.79 paf 730: cache_delete(as_file_spec(r, params, 0));
731: return;
732: }
733:
734: // secods|expires date
1.135 paf 735: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
736: if(!scope)
1.166 misha 737: throw Exception(PARSER_RUNTIME,
1.129 paf 738: 0,
1.79 paf 739: "expire-time reducing instruction without cache");
740:
1.129 paf 741: time_t expires=as_expires(r, params, 0, now);
1.135 paf 742: if(expires < scope->expires)
743: scope->expires=expires;
1.79 paf 744:
745: return;
1.149 paf 746: } else if(params.count()<3)
1.166 misha 747: throw Exception(PARSER_RUNTIME,
1.149 paf 748: 0,
749: "invalid number of parameters");
1.63 paf 750:
751: // file_spec, expires, body code
1.172 misha 752: const String& file_spec=as_file_spec(r, params, 0);
1.65 paf 753:
1.141 paf 754: Cache_scope scope={as_expires(r, params, 1, now), 0};
1.135 paf 755:
756: Temp_hash_value<const String::Body, void*>
757: cache_scope_setter(r.classes_conf, cache_data_name, &scope);
1.136 paf 758: Value& body_code=params.as_junction(2, "body_code must be code");
759: Value* catch_code=0;
760: if(params.count()>3)
761: catch_code=¶ms.as_junction(3, "catch_code must be code");
1.63 paf 762:
1.168 misha 763: if(scope.expires>now) {
764: Cache_get_result cached=cache_get(r.charsets, file_spec, now);
1.69 paf 765:
1.168 misha 766: if(cached.body) { // have cached copy
1.174 misha 767: if(cached.expired) {
768: scope.body_from_disk=cached.body; // storing for user to retrive it with ^cache[]
769: } else {
770: // and it's not expired yet write it out
1.168 misha 771: r.write_assign_lang(*cached.body);
772: // happy with it
773: return;
774: }
775: }
776:
777: // no cached info or it's already expired
1.173 misha 778:
779: // trying to process it under lock and store result in file
1.174 misha 780: const String* processed_body=locked_process_and_cache_put(r, body_code, catch_code, scope, file_spec);
1.173 misha 781: if(processed_body){
1.174 misha 782: // write it out
783: r.write_assign_lang(*processed_body);
784: // happy with it
785: return;
1.173 misha 786: } else {
787: // we fail while get exclusive lock. nvm, we just execute body_code a bit later
1.174 misha 788: }
1.69 paf 789: } else {
1.79 paf 790: // instructed not to cache; forget cached copy
1.68 paf 791: cache_delete(file_spec);
1.69 paf 792: }
1.168 misha 793:
794: // process without cacheing
795: const String& processed_body=r.process_to_string(body_code);
796: // write it out
797: r.write_assign_lang(processed_body);
1.63 paf 798: }
799:
1.136 paf 800: static StringOrValue process_try_body_code(Request& r, Value* body_code) {
801: return r.process(*body_code);
802: }
1.129 paf 803: static void _try_operator(Request& r, MethodParams& params) {
804: Value& body_code=params.as_junction(0, "body_code must be code");
805: Value& catch_code=params.as_junction(1, "catch_code must be code");
1.179 misha 806: Value* finally_code=(params.count()==3) ? ¶ms.as_junction(2, "finally_code must be code") : 0;
807:
808: Try_catch_result result;
809: StringOrValue finally_result;
810: try{
811: result=try_catch(r,
812: process_try_body_code, &body_code,
813: &catch_code);
814: if(result.exception_should_be_handled)
815: throw Exception(PARSER_RUNTIME,
816: result.exception_should_be_handled,
817: "catch block must set $exception.handled to some boolean value, not string");
818: } catch(...){
819: if(finally_code)
820: finally_result=r.process(*finally_code);
821: rethrow;
822: }
1.74 paf 823:
1.179 misha 824: if(finally_code)
825: finally_result=r.process(*finally_code);
1.123 paf 826:
1.136 paf 827: // write out processed body_code or catch_code
828: r.write_pass_lang(result.processed_code);
1.179 misha 829:
830: // write out processed finally code
831: if(finally_code)
832: r.write_pass_lang(finally_result);
1.74 paf 833: }
834:
1.138 paf 835: static void _throw_operator(Request&, MethodParams& params) {
1.178 misha 836: if(params.count()==1 && !params[0].is_string()) {
1.129 paf 837: if(HashStringValue *hash=params[0].get_hash()) {
838: const char* type=0;
839: if(Value* value=hash->get(exception_type_part_name))
1.78 paf 840: type=value->as_string().cstr();
1.129 paf 841: const String* source=0;
842: if(Value* value=hash->get(exception_source_part_name))
1.74 paf 843: source=&value->as_string();
1.138 paf 844: const char* comment=0;
1.129 paf 845: if(Value* value=hash->get(exception_comment_part_name))
1.74 paf 846: comment=value->as_string().cstr();
847:
1.78 paf 848: throw Exception(type,
1.129 paf 849: source?source:0,
850: "%s", comment?comment:"");
1.74 paf 851: } else
1.166 misha 852: throw Exception(PARSER_RUNTIME,
1.129 paf 853: 0,
1.178 misha 854: "one-param version has hash or string param");
1.74 paf 855: } else {
1.129 paf 856: const char* type=params.as_string(0, "type must be string").cstr();
1.178 misha 857: const String* source=params.count()>1? ¶ms.as_string(1, "source must be string"):0;
858: const char* comment=params.count()>2? params.as_string(2, "comment must be string").cstr():0;
859: throw Exception(type, source, "%s", comment?comment:"");
1.74 paf 860: }
1.132 paf 861: }
1.129 paf 862:
1.150 paf 863: static void _sleep_operator(Request& r, MethodParams& params) {
864: double seconds=params.as_double(0, "seconds must be double", r);
1.151 paf 865: pa_sleep((int)trunc(seconds), (int)trunc(seconds*1000));
1.150 paf 866: }
867:
1.129 paf 868: #if defined(WIN32) && defined(_DEBUG)
869: # define PA_BPT
1.138 paf 870: static void _bpt(Request&, MethodParams&) {
1.129 paf 871: _asm int 3;
872: }
873: #endif
874:
1.10 paf 875: // constructor
876:
1.129 paf 877: VClassMAIN::VClassMAIN(): VClass() {
878: set_name(*new String(MAIN_CLASS_NAME));
879:
880: #ifdef PA_BPT
881: // ^bpt[]
882: add_native_method("bpt", Method::CT_ANY, _bpt, 0, 0);
883: #endif
1.121 paf 884:
1.1 paf 885: // ^if(condition){code-when-true}
886: // ^if(condition){code-when-true}{code-when-false}
1.185 misha 887: add_native_method("if", Method::CT_ANY, _if, 2, 3, Method::CO_WITHOUT_FRAME);
1.1 paf 888:
1.194 misha 889: // ^untaint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
890: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 891:
1.194 misha 892: // ^taint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
893: add_native_method("taint", Method::CT_ANY, _taint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 894:
895: // ^process[code]
1.146 paf 896: add_native_method("process", Method::CT_ANY, _process, 1, 3);
1.1 paf 897:
898: // ^rem{code}
1.185 misha 899: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 900:
901: // ^while(condition){code}
1.185 misha 902: add_native_method("while", Method::CT_ANY, _while, 2, 3, Method::CO_WITHOUT_FRAME);
1.1 paf 903:
904: // ^use[file]
1.10 paf 905: add_native_method("use", Method::CT_ANY, _use, 1, 1);
1.1 paf 906:
1.164 paf 907: // ^break[]
1.185 misha 908: add_native_method("break", Method::CT_ANY, _break, 0, 0, Method::CO_WITHOUT_FRAME);
909:
1.164 paf 910: // ^continue[]
1.185 misha 911: add_native_method("continue", Method::CT_ANY, _continue, 0, 0, Method::CO_WITHOUT_FRAME);
912:
1.54 paf 913: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.185 misha 914: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1, Method::CO_WITHOUT_WCONTEXT);
1.1 paf 915:
916: // ^eval(expr)
917: // ^eval(expr)[format]
1.185 misha 918: add_native_method("eval", Method::CT_ANY, _eval, 1, 2, Method::CO_WITHOUT_FRAME);
1.52 parser 919:
1.1 paf 920: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 921: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
922:
1.63 paf 923:
1.136 paf 924: // ^cache[file_spec](time){code}[{catch code}] time=0 no cache
1.65 paf 925: // ^cache[file_spec] delete cache
1.161 paf 926: // ^cache[] get current expiration time
927: add_native_method("cache", Method::CT_ANY, _cache, 0, 4);
1.63 paf 928:
1.28 parser 929: // switch
930:
931: // ^switch[value]{cases}
1.185 misha 932: add_native_method("switch", Method::CT_ANY, _switch, 2, 2, Method::CO_WITHOUT_FRAME);
1.28 parser 933:
934: // ^case[value]{code}
1.185 misha 935: add_native_method("case", Method::CT_ANY, _case, 2, 10000, Method::CO_WITHOUT_FRAME);
1.74 paf 936:
937: // try-catch
938:
939: // ^try{code}{catch code}
1.185 misha 940: add_native_method("try", Method::CT_ANY, _try_operator, 2, 3, Method::CO_WITHOUT_FRAME);
1.74 paf 941: // ^throw[$exception hash]
942: // ^throw[type;source;comment]
943: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
944:
1.150 paf 945: add_native_method("sleep", Method::CT_ANY, _sleep_operator, 1, 1);
1.10 paf 946: }
1.11 paf 947:
948: // constructor & configurator
1.1 paf 949:
1.129 paf 950: VStateless_class& VClassMAIN_create() {
951: return *new VClassMAIN;
1.1 paf 952: }
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