Annotation of parser3/src/classes/op.C, revision 1.228
1.1 paf 1: /** @file
1.9 paf 2: Parser: parser @b operators.
1.1 paf 3:
1.224 moko 4: Copyright (c) 2001-2015 Art. Lebedev Studio (http://www.artlebedev.com)
1.71 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.98 paf 6: */
1.1 paf 7:
1.13 paf 8: #include "classes.h"
1.129 paf 9: #include "pa_vmethod_frame.h"
10:
1.1 paf 11: #include "pa_common.h"
1.134 paf 12: #include "pa_os.h"
1.1 paf 13: #include "pa_request.h"
14: #include "pa_vint.h"
15: #include "pa_sql_connection.h"
1.79 paf 16: #include "pa_vdate.h"
1.105 paf 17: #include "pa_vmethod_frame.h"
1.129 paf 18: #include "pa_vclass.h"
1.144 paf 19: #include "pa_charset.h"
1.1 paf 20:
1.228 ! moko 21: volatile const char * IDENT_OP_C="$Id: op.C,v 1.227 2016/04/17 20:20:48 moko Exp $";
1.209 moko 22:
1.18 parser 23: // limits
24:
1.162 paf 25: #define MAX_LOOPS 20000
1.18 parser 26:
1.10 paf 27: // defines
28:
1.82 paf 29: #define CASE_DEFAULT_VALUE "DEFAULT"
1.11 paf 30:
1.10 paf 31: // class
32:
1.113 paf 33: class VClassMAIN: public VClass {
1.10 paf 34: public:
1.129 paf 35: VClassMAIN();
1.10 paf 36: };
37:
1.129 paf 38: // defines for statics
39:
40: #define SWITCH_DATA_NAME "SWITCH-DATA"
41: #define CACHE_DATA_NAME "CACHE-DATA"
1.164 paf 42:
1.129 paf 43: #define EXCEPTION_VAR_NAME "exception"
44:
45: // statics
46:
47: //^switch ^case
48: static const String switch_data_name(SWITCH_DATA_NAME);
49: //^cache
50: static const String cache_data_name(CACHE_DATA_NAME);
51:
52: static const String exception_var_name(EXCEPTION_VAR_NAME);
53:
1.164 paf 54:
1.136 paf 55: // local defines
56:
57: #define CACHE_EXCEPTION_HANDLED_CACHE_NAME "cache"
58:
1.129 paf 59: // helpers
60:
1.187 misha 61: class Untaint_lang_name2enum: public HashString<String::Language> {
1.129 paf 62: public:
63: Untaint_lang_name2enum() {
1.223 moko 64: #define ULN(name, LANG) put(name, (value_type)(String::L_##LANG));
1.198 misha 65: ULN("clean", CLEAN);
1.129 paf 66: ULN("as-is", AS_IS);
67: ULN("optimized-as-is", AS_IS|String::L_OPTIMIZE_BIT);
68: ULN("file-spec", FILE_SPEC);
69: ULN("http-header", HTTP_HEADER);
70: ULN("mail-header", MAIL_HEADER);
71: ULN("uri", URI);
72: ULN("sql", SQL);
73: ULN("js", JS);
74: ULN("xml", XML);
75: ULN("optimized-xml", XML|String::L_OPTIMIZE_BIT);
76: ULN("html", HTML);
77: ULN("optimized-html", HTML|String::L_OPTIMIZE_BIT);
1.159 paf 78: ULN("regex", REGEX);
1.193 misha 79: ULN("parser-code", PARSER_CODE);
1.204 misha 80: ULN("json", JSON);
1.129 paf 81: #undef ULN
82: }
83: } untaint_lang_name2enum;
84:
1.10 paf 85: // methods
86:
1.129 paf 87: static void _if(Request& r, MethodParams& params) {
1.200 moko 88: size_t max_param=params.count()-1;
89: size_t i=0;
90: do {
91: bool condition=params.as_bool(i, "condition must be expression", r);
92: if(condition) {
93: r.process_write(*params.get(i+1));
94: return;
95: }
96: i+=2;
97: } while (i < max_param);
98:
99: if(i == max_param)
100: r.process_write(*params.get(i));
1.1 paf 101: }
102:
1.210 moko 103: String::Language get_untaint_lang(const String& lang_name){
1.175 misha 104: String::Language lang=untaint_lang_name2enum.get(lang_name);
105: if(!lang)
1.210 moko 106: throw Exception(PARSER_RUNTIME, &lang_name, "invalid taint language");
1.175 misha 107: return lang;
108: }
109:
1.129 paf 110: static void _untaint(Request& r, MethodParams& params) {
111: String::Language lang;
112: if(params.count()==1)
1.175 misha 113: lang=String::L_AS_IS; // mark as simply 'as-is'. useful in html from sql
114: else
1.210 moko 115: lang=get_untaint_lang(params.as_string(0, "lang must be string"));
1.1 paf 116:
117: {
1.129 paf 118: Value& vbody=params.as_junction(params.count()-1, "body must be code");
1.1 paf 119:
1.191 misha 120: Temp_lang temp_lang(r, lang); // set temporarily specified ^untaint[language;
121: StringOrValue result=r.process(vbody); // process marking tainted with that lang
1.188 misha 122: r.write_assign_lang(result);
1.1 paf 123: }
124: }
125:
1.129 paf 126: static void _taint(Request& r, MethodParams& params) {
127: String::Language lang;
128: if(params.count()==1)
1.175 misha 129: lang=String::L_TAINTED; // mark as simply 'tainted'. useful in table:create
130: else
1.210 moko 131: lang=get_untaint_lang(params.as_string(0, "lang must be string"));
1.1 paf 132:
133: {
1.129 paf 134: Value& vbody=params.as_no_junction(params.count()-1, "body must not be code");
1.1 paf 135:
1.191 misha 136: String result(vbody.as_string(), lang); // force result language to specified
1.188 misha 137: r.write_assign_lang(result);
1.1 paf 138: }
139: }
140:
1.205 moko 141: static void _apply_taint(Request& r, MethodParams& params) {
1.210 moko 142: String::Language lang=params.count()==1 ? String::L_AS_IS : get_untaint_lang(params.as_string(0, "lang must be string"));
1.205 moko 143: const String &sbody=params.as_string(params.count()-1, "body must be string");
1.213 moko 144: String::Body result_body=sbody.cstr_to_string_body_untaint(lang, r.connection(false), &r.charsets);
1.205 moko 145: r.write_pass_lang(*new String(result_body, String::L_AS_IS));
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: {
1.197 misha 161: VStateless_class *target_class=target_self->get_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
1.192 misha 168: Temp_lang temp_lang(r, String::L_PARSER_CODE);
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:
174: const String* main_alias=0;
1.146 paf 175: const String* file_alias=0;
176: int line_no_alias_offset=0;
1.216 moko 177: bool allow_class_replace=false;
1.211 misha 178:
179: size_t options_index=index+1;
180: if(options_index<params.count())
181: if(HashStringValue* options=params.as_hash(options_index)) {
1.216 moko 182:
1.211 misha 183: int valid_options=0;
1.216 moko 184: for(HashStringValue::Iterator i(*options); i; i.next() ){
185:
186: String::Body key=i.key();
187: Value* value=i.value();
188:
189: if(key == "main") {
190: valid_options++;
191: main_alias=&value->as_string();
192: } else if(key == "file") {
193: valid_options++;
194: file_alias=&value->as_string();
195: } else if(key == "lineno") {
196: valid_options++;
197: line_no_alias_offset=value->as_int();
198: } else if(key == "replace") {
199: valid_options++;
200: allow_class_replace=r.process_to_value(*value).as_bool();
201: }
1.211 misha 202: }
1.216 moko 203:
1.211 misha 204: if(valid_options!=options->count())
205: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
1.146 paf 206: }
1.129 paf 207:
1.146 paf 208: uint processe_file_no=file_alias?
209: r.register_file(r.absolute(*file_alias))
210: : pseudo_file_no__process;
211: // process...{string}
212: Value& vjunction=params.as_junction(index, "body must be code");
213: // evaluate source to process
214: const String& source=r.process_to_string(vjunction);
1.216 moko 215:
216: Temp_class_replace class_replace(r, allow_class_replace);
217:
1.146 paf 218: r.use_buf(*target_class,
1.190 misha 219: source.untaint_cstr(String::L_AS_IS, r.connection(false)),
1.146 paf 220: main_alias,
221: processe_file_no,
222: line_no_alias_offset);
1.1 paf 223:
1.73 paf 224: // main_method
1.129 paf 225: main_method=target_class->get_method(main_method_name);
1.73 paf 226: }
227: // after restoring current-request-lang
228: // maybe-execute @main[]
229: if(main_method) {
1.202 moko 230: VMethodFrame frame(*main_method, r.get_method_frame()->caller(), *target_self);
231: frame.empty_params();
1.203 moko 232: r.op_call(frame);
233: r.write_pass_lang(frame.result());
1.1 paf 234: }
235: }
236:
1.138 paf 237: static void _rem(Request&, MethodParams& params) {
1.129 paf 238: params.as_junction(0, "body must be code");
1.1 paf 239: }
240:
1.129 paf 241: static void _while(Request& r, MethodParams& params) {
1.196 misha 242: InCycle temp(r);
1.164 paf 243:
1.170 misha 244: Value& vcondition=params.as_expression(0, "condition must be number, bool or expression");
245:
1.162 paf 246: Value& body_code=params.as_junction(1, "body must be code");
247: Value* delim_maybe_code=params.count()>2?¶ms[2]:0;
1.1 paf 248:
249: // while...
250: int endless_loop_count=0;
1.186 misha 251: if(delim_maybe_code){ // delimiter set
1.185 misha 252: bool need_delim=false;
253: while(true) {
254: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
255: throw Exception(PARSER_RUNTIME,
256: 0,
257: "endless loop detected");
258:
259: if(!r.process_to_value(vcondition, false/*don't intercept string*/).as_bool())
260: break;
1.1 paf 261:
1.185 misha 262: StringOrValue sv_processed=r.process(body_code);
263: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 misha 264:
1.185 misha 265: const String* s_processed=sv_processed.get_string();
1.186 misha 266: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 267: if(need_delim) // need delim & iteration produced string?
268: r.write_pass_lang(r.process(*delim_maybe_code));
269: else
270: need_delim=true;
271: }
272: r.write_pass_lang(sv_processed);
1.1 paf 273:
1.185 misha 274: if(lskip==Request::SKIP_BREAK)
275: break;
1.162 paf 276: }
1.185 misha 277: } else {
278: while(true) {
279: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
280: throw Exception(PARSER_RUNTIME,
281: 0,
282: "endless loop detected");
283:
284: if(!r.process_to_value(vcondition, false/*don't intercept string*/).as_bool())
285: break;
1.164 paf 286:
1.185 misha 287: r.process_write(body_code);
288: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
289:
290: if(lskip==Request::SKIP_BREAK)
291: break;
292: }
1.1 paf 293: }
294: }
295:
1.129 paf 296: static void _use(Request& r, MethodParams& params) {
1.171 misha 297: Value& vfile=params.as_no_junction(0, FILE_NAME_MUST_NOT_BE_CODE);
1.199 misha 298:
1.216 moko 299: bool allow_class_replace=false;
300:
301: if(params.count()==2)
302: if(HashStringValue* options=params.as_hash(1)) {
303: int valid_options=0;
304: for(HashStringValue::Iterator i(*options); i; i.next() ){
305:
306: String::Body key=i.key();
307: Value* value=i.value();
308:
309: if(key == "replace") {
310: valid_options++;
311: allow_class_replace=r.process_to_value(*value).as_bool();
312: }
313:
314: if(valid_options!=options->count())
315: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
316: }
317: }
318:
319: Temp_class_replace class_replace(r, allow_class_replace);
320:
1.199 misha 321: // _use could be called from the parser3 method only, so caller is always defined
1.202 moko 322: r.use_file(r.main_class, vfile.as_string(), r.get_method_filename(&r.get_method_frame()->caller()->method));
1.1 paf 323: }
324:
1.164 paf 325: static void set_skip(Request& r, Request::Skip askip) {
1.196 misha 326: if(!r.get_in_cycle())
1.227 moko 327: throw Exception(askip==Request::SKIP_BREAK ? "parser.break" : "parser.continue", 0, "without cycle");
1.164 paf 328: r.set_skip(askip);
329: }
330:
1.227 moko 331: static void _break(Request& r, MethodParams& params) {
332: if(!params.count() || params.as_bool(0, "condition must be expression", r)) set_skip(r, Request::SKIP_BREAK);
1.164 paf 333: }
334:
1.227 moko 335: static void _continue(Request& r, MethodParams& params) {
336: if(!params.count() || params.as_bool(0, "condition must be expression", r)) set_skip(r, Request::SKIP_CONTINUE);
1.164 paf 337: }
338:
1.129 paf 339: static void _for(Request& r, MethodParams& params) {
1.196 misha 340: InCycle temp(r);
1.164 paf 341:
1.129 paf 342: const String& var_name=params.as_string(0, "var name must be string");
343: int from=params.as_int(1, "from must be int", r);
344: int to=params.as_int(2, "to must be int", r);
1.186 misha 345: Value& body_code=params.as_junction(3, "body must be code");
1.129 paf 346: Value* delim_maybe_code=params.count()>4?¶ms[4]:0;
1.1 paf 347:
1.57 paf 348: if(to-from>=MAX_LOOPS) // too long loop?
1.166 misha 349: throw Exception(PARSER_RUNTIME,
1.129 paf 350: 0,
1.57 paf 351: "endless loop detected");
352:
1.129 paf 353: VInt* vint=new VInt(0);
1.154 paf 354:
355: VMethodFrame& caller=*r.get_method_frame()->caller();
1.218 moko 356: r.put_element(caller, var_name, vint);
1.186 misha 357: if(delim_maybe_code){ // delimiter set
1.185 misha 358: bool need_delim=false;
359:
360: for(int i=from; i<=to; i++) {
361: vint->set_int(i);
362:
363: StringOrValue sv_processed=r.process(body_code);
364: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 misha 365:
1.185 misha 366: const String* s_processed=sv_processed.get_string();
1.186 misha 367: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 368: if(need_delim) // need delim & iteration produced string?
369: r.write_pass_lang(r.process(*delim_maybe_code));
370: else
371: need_delim=true;
372: }
373: r.write_pass_lang(sv_processed);
1.1 paf 374:
1.185 misha 375: if(lskip==Request::SKIP_BREAK)
376: break;
1.1 paf 377: }
1.185 misha 378: } else {
379: for(int i=from; i<=to; i++) {
380: vint->set_int(i);
381:
382: r.process_write(body_code);
383: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.164 paf 384:
1.185 misha 385: if(lskip==Request::SKIP_BREAK)
386: break;
387: }
1.1 paf 388: }
389: }
390:
1.129 paf 391: static void _eval(Request& r, MethodParams& params) {
392: Value& expr=params.as_junction(0, "need expression");
1.1 paf 393: // evaluate expresion
1.129 paf 394: Value& value_result=r.process_to_value(expr,
1.165 misha 395: false/*don't intercept string*/).as_expr_result();
1.129 paf 396: if(params.count()>1) {
1.177 misha 397: const String& fmt=params.as_string(1, "fmt must be string").trim();
398: if(fmt.is_empty()){
399: r.write_no_lang(value_result);
400: } else {
401: r.write_no_lang(String(format(value_result.as_double(), fmt.cstrm())));
402: }
1.91 paf 403: } else
1.129 paf 404: r.write_no_lang(value_result);
1.1 paf 405: }
406:
1.129 paf 407: static void _connect(Request& r, MethodParams& params) {
408: Value& url=params.as_no_junction(0, "url must not be code");
409: Value& body_code=params.as_junction(1, "body must be code");
1.1 paf 410:
1.129 paf 411: Table* protocol2driver_and_client=0;
1.197 misha 412: if(Value* sql=r.main_class.get_element(String(MAIN_SQL_NAME))) {
413: if(Value* element=sql->get_element(String(MAIN_SQL_DRIVERS_NAME))) {
1.113 paf 414: protocol2driver_and_client=element->get_table();
415: }
416: }
1.11 paf 417:
1.1 paf 418: // connect
1.142 paf 419: SQL_Connection* connection=SQL_driver_manager->get_connection(url.as_string(),
1.144 paf 420: protocol2driver_and_client,
1.180 misha 421: r.charsets.source().NAME().cstr(),
422: r.request_info.document_root);
1.1 paf 423:
1.214 moko 424: Temp_connection temp_connection(r, connection);
1.63 paf 425:
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;
1.207 misha 444: bool searching_bool;
1.129 paf 445: Value* found;
446: Value* _default;
447: public:
448: Switch_data(Request& ar, Value& asearching):
1.181 misha 449: r(ar)
450: {
451: if(asearching.is_string() || asearching.is_void()){
452: searching_string=&asearching.as_string();
453: searching_double=0;
1.207 misha 454: searching_bool=false;
1.181 misha 455: } else {
456: searching_string=0;
457: searching_double=asearching.as_double();
1.207 misha 458: searching_bool=asearching.is_bool();
1.181 misha 459: }
460: }
1.28 parser 461: };
1.41 parser 462: #endif
1.129 paf 463: static void _switch(Request& r, MethodParams& params) {
464: Switch_data* data=new Switch_data(r, r.process_to_value(params[0]));
1.215 moko 465: Temp_hash_value<HashString<void*>, void*> switch_data_setter(&r.classes_conf, switch_data_name, data);
1.28 parser 466:
1.129 paf 467: Value& cases_code=params.as_junction(1, "switch cases must be code");
1.82 paf 468: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
469: // because of stacked WWrapper used there as wcontext
1.84 paf 470: r.process(cases_code, true/*intercept_string*/);
1.147 paf 471: if(Value* selected_code=data->found? data->found: data->_default)
1.107 paf 472: r.write_pass_lang(r.process(*selected_code));
1.28 parser 473: }
474:
1.129 paf 475: static void _case(Request& r, MethodParams& params) {
476: Switch_data* data=static_cast<Switch_data*>(r.classes_conf.get(switch_data_name));
1.38 parser 477: if(!data)
1.166 misha 478: throw Exception(PARSER_RUNTIME,
1.129 paf 479: 0,
1.38 parser 480: "without switch");
1.28 parser 481:
1.181 misha 482: if(data->found) // matches already was found
483: return;
484:
1.129 paf 485: int count=params.count();
1.184 misha 486: Value* code=¶ms.as_expression(--count, "case result must be code");
487:
488: #ifdef USE_DESTRUCTORS
489: Junction *j=code->get_junction();
490: if (j){
491: code=new VJunction(j->self,j->method,j->method_frame,j->rcontext,j->wcontext,j->code);
492: if (j->wcontext) j->wcontext->attach_junction((VJunction *)code);
493: }
494: #endif
1.83 paf 495:
1.181 misha 496: for(int i=0; i<count; i++){
1.129 paf 497: Value& value=r.process_to_value(params[i]);
1.28 parser 498:
1.181 misha 499: if(value.is_string() && value.as_string() == CASE_DEFAULT_VALUE){
1.184 misha 500: data->_default=code;
1.181 misha 501: continue;
1.28 parser 502: }
503:
504: bool matches;
1.181 misha 505: if(data->searching_string)
506: matches=(*data->searching_string) == value.as_string();
1.207 misha 507: else if(data->searching_bool || value.is_bool())
508: matches=(data->searching_double != 0) == value.as_bool();
1.28 parser 509: else
1.181 misha 510: matches=data->searching_double == value.as_double();
1.82 paf 511:
1.181 misha 512: if(matches){
1.184 misha 513: data->found=code;
1.28 parser 514: break;
515: }
516: }
517: }
1.136 paf 518: #ifndef DOXYGEN
519: struct Try_catch_result {
520: StringOrValue processed_code;
521: const String* exception_should_be_handled;
522:
523: Try_catch_result(): exception_should_be_handled(0) {}
524: };
525: #endif
526:
527: /// used by ^try and ^cache, @returns $exception.handled[string] if any
528: template<class I>
1.228 ! moko 529: static Try_catch_result try_catch(Request& r, StringOrValue body_code(Request&, I), I info, Value* catch_code, bool could_be_handled_by_caller=false) {
1.136 paf 530: Try_catch_result result;
1.179 misha 531:
1.228 ! moko 532: // minor bug: context not restored if only finally code is present, see #1062
1.136 paf 533: if(!catch_code) {
534: result.processed_code=body_code(r, info);
535: return result;
536: }
537:
538: // taking snapshot of try-context
539: Request_context_saver try_context(r);
540: try {
541: result.processed_code=body_code(r, info);
542: } catch(const Exception& e) {
543: Request::Exception_details details=r.get_details(e);
1.228 ! moko 544: try_context.restore(); // restoring try-context for code after try and catch-code
1.136 paf 545:
1.228 ! moko 546: {
! 547: Temp_value_element temp(r, *catch_code->get_junction()->method_frame, exception_var_name, &details.vhash);
! 548: result.processed_code=r.process(*catch_code);
! 549: }
1.136 paf 550:
1.228 ! moko 551: // retriving $exception.handled
1.136 paf 552: Value* vhandled=details.vhash.hash().get(exception_handled_part_name);
553:
554: bool bhandled=false;
555: if(vhandled) {
556: if(vhandled->is_string()) { // not simple $exception.handled(1/0)?
1.228 ! moko 557: if(bhandled=could_be_handled_by_caller) { // and we can possibly handle it
1.160 paf 558: result.exception_should_be_handled=vhandled->get_string(); // considering 'recovered' and let the caller recover
559: }
560: } else
1.179 misha 561: bhandled=vhandled->as_bool();
1.136 paf 562: }
563:
1.228 ! moko 564: if(!bhandled)
1.136 paf 565: rethrow;
566: }
1.179 misha 567:
1.136 paf 568: return result;
569: }
1.28 parser 570:
1.222 moko 571: static StringOrValue process_try_body_code(Request& r, Value* body_code) {
572: return r.process(*body_code);
573: }
574:
1.63 paf 575: // cache--
576:
577: // consts
578:
1.152 paf 579: const int DATA_STRING_SERIALIZED_VERSION=0x0006;
1.63 paf 580:
581: // helper types
582:
583: #ifndef DOXYGEN
584: struct Data_string_serialized_prolog {
585: int version;
1.79 paf 586: time_t expires;
1.63 paf 587: };
588: #endif
589:
1.68 paf 590: void cache_delete(const String& file_spec) {
1.167 misha 591: file_delete(file_spec, false/*fail_on_problem*/);
1.63 paf 592: }
1.69 paf 593:
594: #ifndef DOXYGEN
1.135 paf 595: struct Cache_scope {
1.129 paf 596: public:
1.79 paf 597: time_t expires;
1.135 paf 598: const String* body_from_disk;
1.79 paf 599: };
1.69 paf 600: struct Locked_process_and_cache_put_action_info {
601: Request *r;
1.136 paf 602: Cache_scope *scope;
1.167 misha 603: Value* body_code;
604: Value* catch_code;
1.136 paf 605: const String* processed_code;
1.69 paf 606: };
607: #endif
1.136 paf 608:
609:
610:
611: static StringOrValue process_cache_body_code(Request& r, Value* body_code) {
1.153 paf 612: return StringOrValue(r.process_to_string(*body_code));
1.136 paf 613: }
614:
1.129 paf 615: /* @todo maybe network order worth spending some effort?
616: don't bothering myself with network byte order,
617: am not planning to be able to move resulting file across platforms
618: */
1.69 paf 619: static void locked_process_and_cache_put_action(int f, void *context) {
620: Locked_process_and_cache_put_action_info& info=
621: *static_cast<Locked_process_and_cache_put_action_info *>(context);
1.129 paf 622:
1.160 paf 623: const String* body_from_disk=info.scope->body_from_disk;
1.69 paf 624: // body->process
1.136 paf 625: Try_catch_result result=try_catch(*info.r,
626: process_cache_body_code, info.body_code,
1.160 paf 627: info.catch_code, body_from_disk!=0 /*we have something old=we can handle=recover later*/);
1.136 paf 628:
629: if(result.exception_should_be_handled) {
630: if(*result.exception_should_be_handled==CACHE_EXCEPTION_HANDLED_CACHE_NAME) {
1.160 paf 631: assert(body_from_disk);
632: info.processed_code=body_from_disk;
1.136 paf 633: } else
1.166 misha 634: throw Exception(PARSER_RUNTIME,
1.136 paf 635: result.exception_should_be_handled,
1.219 moko 636: "$" EXCEPTION_VAR_NAME "." EXCEPTION_HANDLED_PART_NAME " value must be "
637: "either boolean or string '" CACHE_EXCEPTION_HANDLED_CACHE_NAME "'");
1.136 paf 638: } else
639: info.processed_code=&result.processed_code.as_string();
1.69 paf 640:
1.79 paf 641: // expiration time not spoiled by ^cache(0) or something?
1.136 paf 642: if(info.scope->expires > time(0)) {
1.79 paf 643: // string -serialize> buffer
1.136 paf 644: String::Cm serialized=info.processed_code->serialize(
1.129 paf 645: sizeof(Data_string_serialized_prolog));
1.79 paf 646: Data_string_serialized_prolog& prolog=
1.129 paf 647: *reinterpret_cast<Data_string_serialized_prolog *>(serialized.str);
1.79 paf 648: prolog.version=DATA_STRING_SERIALIZED_VERSION;
1.136 paf 649: prolog.expires=info.scope->expires;
1.79 paf 650:
651: // buffer -write> file
1.129 paf 652: write(f, serialized.str, serialized.length);
1.79 paf 653: } else // expired!
1.136 paf 654: info.scope->expires=0; // flag it so that could be easily checked by caller
1.69 paf 655: }
1.129 paf 656: const String* locked_process_and_cache_put(Request& r,
1.128 paf 657: Value& body_code,
1.136 paf 658: Value* catch_code,
659: Cache_scope& scope,
660: const String& file_spec)
661: {
1.140 paf 662: Locked_process_and_cache_put_action_info info={&r, &scope, &body_code, catch_code, 0};
1.69 paf 663:
1.129 paf 664: const String* result=file_write_action_under_lock(
1.69 paf 665: file_spec,
1.168 misha 666: "cache_put",
667: locked_process_and_cache_put_action,
668: &info,
1.69 paf 669: false/*as_text*/,
670: false/*do_append*/,
1.173 misha 671: false/*block == don't wait till other thread release lock*/,
672: false/*dun throw exception if lock failed*/) ? info.processed_code: 0;
1.168 misha 673:
1.100 paf 674: time_t now=time(0);
1.136 paf 675: if(scope.expires<=now)
1.79 paf 676: cache_delete(file_spec);
677: return result;
1.63 paf 678: }
1.137 paf 679: #ifndef DOXYGEN
1.135 paf 680: struct Cache_get_result {
681: const String* body;
682: bool expired;
1.137 paf 683: };
684: #endif
685: static Cache_get_result cache_get(Request_charsets& charsets, const String& file_spec, time_t now) {
1.140 paf 686: Cache_get_result result={0, false};
1.135 paf 687:
1.129 paf 688: File_read_result file=file_read(charsets, file_spec,
1.63 paf 689: false/*as_text*/,
1.129 paf 690: 0, //no params
691: false/*fail_on_read_problem*/);
692: if(file.success && file.length/* ignore reads which are empty due to
1.72 paf 693: non-unary open+lockEX conflict with lockSH */) {
1.129 paf 694:
1.72 paf 695: Data_string_serialized_prolog& prolog=
1.129 paf 696: *reinterpret_cast<Data_string_serialized_prolog *>(file.str);
1.63 paf 697:
1.135 paf 698: String* body=new String;
1.72 paf 699: if(
1.129 paf 700: file.length>=sizeof(Data_string_serialized_prolog)
1.135 paf 701: && prolog.version==DATA_STRING_SERIALIZED_VERSION) {
702: if(body->deserialize(sizeof(Data_string_serialized_prolog), file.str, file.length)) {
703: result.body=body;
704: result.expired=prolog.expires <= now;
705: }
706: }
1.72 paf 707: }
1.63 paf 708:
1.135 paf 709: return result;
1.63 paf 710: }
1.129 paf 711: static time_t as_expires(Request& r, MethodParams& params,
1.79 paf 712: int index, time_t now) {
713: time_t result;
1.197 misha 714: if(Value* vdate=params[index].as(VDATE_TYPE))
1.220 moko 715: result=(time_t)(static_cast<VDate*>(vdate)->get_time());
1.79 paf 716: else
1.129 paf 717: result=now+(time_t)params.as_double(index, "lifespan must be date or number", r);
1.79 paf 718:
719: return result;
720: }
1.129 paf 721: static const String& as_file_spec(Request& r, MethodParams& params, int index) {
722: return r.absolute(params.as_string(index, "filespec must be string"));
1.79 paf 723: }
1.129 paf 724: static void _cache(Request& r, MethodParams& params) {
1.173 misha 725: if(params.count()==0) {
726: // ^cache[] -- return current expiration time
1.158 paf 727: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
728: if(!scope)
1.221 moko 729: throw Exception(PARSER_RUNTIME, 0, "expire-time get without cache");
730: r.write_no_lang(*new VDate((pa_time_t)scope->expires));
1.158 paf 731: return;
732: }
733:
1.79 paf 734: time_t now=time(0);
735:
1.129 paf 736: if(params.count()==1) {
1.173 misha 737: // ^cache[filename] ^cache(seconds) ^cache[expires date]
1.129 paf 738: if(params[0].is_string()) { // filename?
1.79 paf 739: cache_delete(as_file_spec(r, params, 0));
740: return;
741: }
742:
743: // secods|expires date
1.135 paf 744: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
745: if(!scope)
1.166 misha 746: throw Exception(PARSER_RUNTIME,
1.129 paf 747: 0,
1.79 paf 748: "expire-time reducing instruction without cache");
749:
1.129 paf 750: time_t expires=as_expires(r, params, 0, now);
1.135 paf 751: if(expires < scope->expires)
752: scope->expires=expires;
1.79 paf 753:
754: return;
1.149 paf 755: } else if(params.count()<3)
1.166 misha 756: throw Exception(PARSER_RUNTIME,
1.149 paf 757: 0,
758: "invalid number of parameters");
1.63 paf 759:
760: // file_spec, expires, body code
1.172 misha 761: const String& file_spec=as_file_spec(r, params, 0);
1.65 paf 762:
1.141 paf 763: Cache_scope scope={as_expires(r, params, 1, now), 0};
1.135 paf 764:
1.215 moko 765: Temp_hash_value<HashString<void*>, void*> cache_scope_setter(&r.classes_conf, cache_data_name, &scope);
1.136 paf 766: Value& body_code=params.as_junction(2, "body_code must be code");
767: Value* catch_code=0;
768: if(params.count()>3)
769: catch_code=¶ms.as_junction(3, "catch_code must be code");
1.63 paf 770:
1.168 misha 771: if(scope.expires>now) {
772: Cache_get_result cached=cache_get(r.charsets, file_spec, now);
1.69 paf 773:
1.168 misha 774: if(cached.body) { // have cached copy
1.174 misha 775: if(cached.expired) {
776: scope.body_from_disk=cached.body; // storing for user to retrive it with ^cache[]
777: } else {
778: // and it's not expired yet write it out
1.168 misha 779: r.write_assign_lang(*cached.body);
780: // happy with it
781: return;
782: }
783: }
784:
785: // no cached info or it's already expired
1.173 misha 786:
787: // trying to process it under lock and store result in file
1.174 misha 788: const String* processed_body=locked_process_and_cache_put(r, body_code, catch_code, scope, file_spec);
1.173 misha 789: if(processed_body){
1.174 misha 790: // write it out
791: r.write_assign_lang(*processed_body);
792: // happy with it
793: return;
1.173 misha 794: } else {
795: // we fail while get exclusive lock. nvm, we just execute body_code a bit later
1.174 misha 796: }
1.69 paf 797: } else {
1.79 paf 798: // instructed not to cache; forget cached copy
1.68 paf 799: cache_delete(file_spec);
1.69 paf 800: }
1.168 misha 801:
1.222 moko 802: // process without caching
803: if(catch_code){
804: Try_catch_result result=try_catch(r, process_try_body_code, &body_code, catch_code);
805: r.write_assign_lang(result.processed_code);
806: } else {
807: const String& processed_body=r.process_to_string(body_code);
808: r.write_assign_lang(processed_body);
809: }
1.63 paf 810: }
811:
1.129 paf 812: static void _try_operator(Request& r, MethodParams& params) {
813: Value& body_code=params.as_junction(0, "body_code must be code");
814: Value& catch_code=params.as_junction(1, "catch_code must be code");
1.179 misha 815: Value* finally_code=(params.count()==3) ? ¶ms.as_junction(2, "finally_code must be code") : 0;
816:
817: Try_catch_result result;
818: StringOrValue finally_result;
819: try{
1.222 moko 820: result=try_catch(r, process_try_body_code, &body_code, &catch_code);
1.179 misha 821: } catch(...){
822: if(finally_code)
823: finally_result=r.process(*finally_code);
824: rethrow;
825: }
1.74 paf 826:
1.179 misha 827: if(finally_code)
828: finally_result=r.process(*finally_code);
1.123 paf 829:
1.136 paf 830: // write out processed body_code or catch_code
831: r.write_pass_lang(result.processed_code);
1.179 misha 832:
833: // write out processed finally code
834: if(finally_code)
835: r.write_pass_lang(finally_result);
1.74 paf 836: }
837:
1.138 paf 838: static void _throw_operator(Request&, MethodParams& params) {
1.178 misha 839: if(params.count()==1 && !params[0].is_string()) {
1.129 paf 840: if(HashStringValue *hash=params[0].get_hash()) {
841: const char* type=0;
842: if(Value* value=hash->get(exception_type_part_name))
1.78 paf 843: type=value->as_string().cstr();
1.129 paf 844: const String* source=0;
845: if(Value* value=hash->get(exception_source_part_name))
1.74 paf 846: source=&value->as_string();
1.138 paf 847: const char* comment=0;
1.129 paf 848: if(Value* value=hash->get(exception_comment_part_name))
1.74 paf 849: comment=value->as_string().cstr();
850:
1.78 paf 851: throw Exception(type,
1.129 paf 852: source?source:0,
853: "%s", comment?comment:"");
1.74 paf 854: } else
1.166 misha 855: throw Exception(PARSER_RUNTIME,
1.129 paf 856: 0,
1.178 misha 857: "one-param version has hash or string param");
1.74 paf 858: } else {
1.129 paf 859: const char* type=params.as_string(0, "type must be string").cstr();
1.178 misha 860: const String* source=params.count()>1? ¶ms.as_string(1, "source must be string"):0;
861: const char* comment=params.count()>2? params.as_string(2, "comment must be string").cstr():0;
862: throw Exception(type, source, "%s", comment?comment:"");
1.74 paf 863: }
1.132 paf 864: }
1.129 paf 865:
1.150 paf 866: static void _sleep_operator(Request& r, MethodParams& params) {
867: double seconds=params.as_double(0, "seconds must be double", r);
1.206 moko 868: if(seconds>0)
869: pa_sleep((int)trunc(seconds), (int)trunc((seconds-trunc(seconds))*1000000));
1.150 paf 870: }
871:
1.129 paf 872: #if defined(WIN32) && defined(_DEBUG)
873: # define PA_BPT
1.138 paf 874: static void _bpt(Request&, MethodParams&) {
1.129 paf 875: _asm int 3;
876: }
877: #endif
878:
1.10 paf 879: // constructor
880:
1.226 moko 881: VClassMAIN::VClassMAIN(): VClass(MAIN_CLASS_NAME) {
1.129 paf 882:
883: #ifdef PA_BPT
884: // ^bpt[]
885: add_native_method("bpt", Method::CT_ANY, _bpt, 0, 0);
886: #endif
1.121 paf 887:
1.1 paf 888: // ^if(condition){code-when-true}
889: // ^if(condition){code-when-true}{code-when-false}
1.200 moko 890: // ^if(condition){code-when-true} (another condition){code-when-true} ... {code-when-false}
891: add_native_method("if", Method::CT_ANY, _if, 2, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 892:
1.194 misha 893: // ^untaint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
894: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 895:
1.194 misha 896: // ^taint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
897: add_native_method("taint", Method::CT_ANY, _taint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 898:
1.205 moko 899: // ^apply-taint[untaint lang][string]
900: add_native_method("apply-taint", Method::CT_ANY, _apply_taint, 1, 2, Method::CO_WITHOUT_FRAME);
901:
1.216 moko 902: // ^process{code}
903: // ^process[context]{code}[options hash]
1.146 paf 904: add_native_method("process", Method::CT_ANY, _process, 1, 3);
1.1 paf 905:
906: // ^rem{code}
1.185 misha 907: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 908:
909: // ^while(condition){code}
1.185 misha 910: add_native_method("while", Method::CT_ANY, _while, 2, 3, Method::CO_WITHOUT_FRAME);
1.1 paf 911:
1.216 moko 912: // ^use[file[;options hash]]
913: add_native_method("use", Method::CT_ANY, _use, 1, 2);
1.1 paf 914:
1.164 paf 915: // ^break[]
1.227 moko 916: // ^break(condition)
917: add_native_method("break", Method::CT_ANY, _break, 0, 1, Method::CO_WITHOUT_FRAME);
1.185 misha 918:
1.164 paf 919: // ^continue[]
1.227 moko 920: // ^continue(condition)
921: add_native_method("continue", Method::CT_ANY, _continue, 0, 1, Method::CO_WITHOUT_FRAME);
1.185 misha 922:
1.54 paf 923: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.185 misha 924: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1, Method::CO_WITHOUT_WCONTEXT);
1.1 paf 925:
926: // ^eval(expr)
927: // ^eval(expr)[format]
1.185 misha 928: add_native_method("eval", Method::CT_ANY, _eval, 1, 2, Method::CO_WITHOUT_FRAME);
1.52 parser 929:
1.1 paf 930: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 931: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
932:
1.63 paf 933:
1.136 paf 934: // ^cache[file_spec](time){code}[{catch code}] time=0 no cache
1.65 paf 935: // ^cache[file_spec] delete cache
1.161 paf 936: // ^cache[] get current expiration time
937: add_native_method("cache", Method::CT_ANY, _cache, 0, 4);
1.63 paf 938:
1.28 parser 939: // switch
940:
941: // ^switch[value]{cases}
1.185 misha 942: add_native_method("switch", Method::CT_ANY, _switch, 2, 2, Method::CO_WITHOUT_FRAME);
1.28 parser 943:
944: // ^case[value]{code}
1.185 misha 945: add_native_method("case", Method::CT_ANY, _case, 2, 10000, Method::CO_WITHOUT_FRAME);
1.74 paf 946:
947: // try-catch
948:
949: // ^try{code}{catch code}
1.185 misha 950: add_native_method("try", Method::CT_ANY, _try_operator, 2, 3, Method::CO_WITHOUT_FRAME);
1.74 paf 951: // ^throw[$exception hash]
952: // ^throw[type;source;comment]
953: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
954:
1.150 paf 955: add_native_method("sleep", Method::CT_ANY, _sleep_operator, 1, 1);
1.10 paf 956: }
1.11 paf 957:
958: // constructor & configurator
1.1 paf 959:
1.129 paf 960: VStateless_class& VClassMAIN_create() {
961: return *new VClassMAIN;
1.1 paf 962: }
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