Annotation of parser3/src/classes/op.C, revision 1.231
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:
1.231 ! moko 21: volatile const char * IDENT_OP_C="$Id: op.C,v 1.230 2016/06/17 12:35:36 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);
171:
172: const String* main_alias=0;
1.146 paf 173: const String* file_alias=0;
174: int line_no_alias_offset=0;
1.216 moko 175: bool allow_class_replace=false;
1.211 misha 176:
177: size_t options_index=index+1;
178: if(options_index<params.count())
179: if(HashStringValue* options=params.as_hash(options_index)) {
1.216 moko 180:
1.211 misha 181: int valid_options=0;
1.216 moko 182: for(HashStringValue::Iterator i(*options); i; i.next() ){
183:
184: String::Body key=i.key();
185: Value* value=i.value();
186:
187: if(key == "main") {
188: valid_options++;
189: main_alias=&value->as_string();
190: } else if(key == "file") {
191: valid_options++;
192: file_alias=&value->as_string();
193: } else if(key == "lineno") {
194: valid_options++;
195: line_no_alias_offset=value->as_int();
196: } else if(key == "replace") {
197: valid_options++;
198: allow_class_replace=r.process_to_value(*value).as_bool();
199: }
1.211 misha 200: }
1.216 moko 201:
1.211 misha 202: if(valid_options!=options->count())
203: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
1.146 paf 204: }
1.129 paf 205:
1.146 paf 206: uint processe_file_no=file_alias?
207: r.register_file(r.absolute(*file_alias))
208: : pseudo_file_no__process;
209: // process...{string}
210: Value& vjunction=params.as_junction(index, "body must be code");
211: // evaluate source to process
212: const String& source=r.process_to_string(vjunction);
1.216 moko 213:
214: Temp_class_replace class_replace(r, allow_class_replace);
215:
1.146 paf 216: r.use_buf(*target_class,
1.190 misha 217: source.untaint_cstr(String::L_AS_IS, r.connection(false)),
1.146 paf 218: main_alias,
219: processe_file_no,
220: line_no_alias_offset);
1.1 paf 221:
1.73 paf 222: // main_method
1.129 paf 223: main_method=target_class->get_method(main_method_name);
1.73 paf 224: }
225: // after restoring current-request-lang
226: // maybe-execute @main[]
227: if(main_method) {
1.202 moko 228: VMethodFrame frame(*main_method, r.get_method_frame()->caller(), *target_self);
229: frame.empty_params();
1.203 moko 230: r.op_call(frame);
231: r.write_pass_lang(frame.result());
1.1 paf 232: }
233: }
234:
1.138 paf 235: static void _rem(Request&, MethodParams& params) {
1.129 paf 236: params.as_junction(0, "body must be code");
1.1 paf 237: }
238:
1.129 paf 239: static void _while(Request& r, MethodParams& params) {
1.196 misha 240: InCycle temp(r);
1.164 paf 241:
1.170 misha 242: Value& vcondition=params.as_expression(0, "condition must be number, bool or expression");
243:
1.162 paf 244: Value& body_code=params.as_junction(1, "body must be code");
245: Value* delim_maybe_code=params.count()>2?¶ms[2]:0;
1.1 paf 246:
247: // while...
248: int endless_loop_count=0;
1.186 misha 249: if(delim_maybe_code){ // delimiter set
1.185 misha 250: bool need_delim=false;
251: while(true) {
252: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
253: throw Exception(PARSER_RUNTIME,
254: 0,
255: "endless loop detected");
256:
257: if(!r.process_to_value(vcondition, false/*don't intercept string*/).as_bool())
258: break;
1.1 paf 259:
1.185 misha 260: StringOrValue sv_processed=r.process(body_code);
261: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 misha 262:
1.185 misha 263: const String* s_processed=sv_processed.get_string();
1.186 misha 264: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 265: if(need_delim) // need delim & iteration produced string?
266: r.write_pass_lang(r.process(*delim_maybe_code));
267: else
268: need_delim=true;
269: }
270: r.write_pass_lang(sv_processed);
1.1 paf 271:
1.185 misha 272: if(lskip==Request::SKIP_BREAK)
273: break;
1.162 paf 274: }
1.185 misha 275: } else {
276: while(true) {
277: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
278: throw Exception(PARSER_RUNTIME,
279: 0,
280: "endless loop detected");
281:
282: if(!r.process_to_value(vcondition, false/*don't intercept string*/).as_bool())
283: break;
1.164 paf 284:
1.185 misha 285: r.process_write(body_code);
286: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
287:
288: if(lskip==Request::SKIP_BREAK)
289: break;
290: }
1.1 paf 291: }
292: }
293:
1.129 paf 294: static void _use(Request& r, MethodParams& params) {
1.171 misha 295: Value& vfile=params.as_no_junction(0, FILE_NAME_MUST_NOT_BE_CODE);
1.199 misha 296:
1.216 moko 297: bool allow_class_replace=false;
298:
299: if(params.count()==2)
300: if(HashStringValue* options=params.as_hash(1)) {
301: int valid_options=0;
302: for(HashStringValue::Iterator i(*options); i; i.next() ){
303:
304: String::Body key=i.key();
305: Value* value=i.value();
306:
307: if(key == "replace") {
308: valid_options++;
309: allow_class_replace=r.process_to_value(*value).as_bool();
310: }
311:
312: if(valid_options!=options->count())
313: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
314: }
315: }
316:
317: Temp_class_replace class_replace(r, allow_class_replace);
318:
1.199 misha 319: // _use could be called from the parser3 method only, so caller is always defined
1.202 moko 320: r.use_file(r.main_class, vfile.as_string(), r.get_method_filename(&r.get_method_frame()->caller()->method));
1.1 paf 321: }
322:
1.164 paf 323: static void set_skip(Request& r, Request::Skip askip) {
1.196 misha 324: if(!r.get_in_cycle())
1.227 moko 325: throw Exception(askip==Request::SKIP_BREAK ? "parser.break" : "parser.continue", 0, "without cycle");
1.164 paf 326: r.set_skip(askip);
327: }
328:
1.227 moko 329: static void _break(Request& r, MethodParams& params) {
330: if(!params.count() || params.as_bool(0, "condition must be expression", r)) set_skip(r, Request::SKIP_BREAK);
1.164 paf 331: }
332:
1.227 moko 333: static void _continue(Request& r, MethodParams& params) {
334: if(!params.count() || params.as_bool(0, "condition must be expression", r)) set_skip(r, Request::SKIP_CONTINUE);
1.164 paf 335: }
336:
1.129 paf 337: static void _for(Request& r, MethodParams& params) {
1.196 misha 338: InCycle temp(r);
1.164 paf 339:
1.129 paf 340: const String& var_name=params.as_string(0, "var name must be string");
341: int from=params.as_int(1, "from must be int", r);
342: int to=params.as_int(2, "to must be int", r);
1.186 misha 343: Value& body_code=params.as_junction(3, "body must be code");
1.129 paf 344: Value* delim_maybe_code=params.count()>4?¶ms[4]:0;
1.1 paf 345:
1.57 paf 346: if(to-from>=MAX_LOOPS) // too long loop?
1.166 misha 347: throw Exception(PARSER_RUNTIME,
1.129 paf 348: 0,
1.57 paf 349: "endless loop detected");
350:
1.129 paf 351: VInt* vint=new VInt(0);
1.154 paf 352:
353: VMethodFrame& caller=*r.get_method_frame()->caller();
1.218 moko 354: r.put_element(caller, var_name, vint);
1.186 misha 355: if(delim_maybe_code){ // delimiter set
1.185 misha 356: bool need_delim=false;
357:
358: for(int i=from; i<=to; i++) {
359: vint->set_int(i);
360:
361: StringOrValue sv_processed=r.process(body_code);
362: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 misha 363:
1.185 misha 364: const String* s_processed=sv_processed.get_string();
1.186 misha 365: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 366: if(need_delim) // need delim & iteration produced string?
367: r.write_pass_lang(r.process(*delim_maybe_code));
368: else
369: need_delim=true;
370: }
371: r.write_pass_lang(sv_processed);
1.1 paf 372:
1.185 misha 373: if(lskip==Request::SKIP_BREAK)
374: break;
1.1 paf 375: }
1.185 misha 376: } else {
377: for(int i=from; i<=to; i++) {
378: vint->set_int(i);
379:
380: r.process_write(body_code);
381: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.164 paf 382:
1.185 misha 383: if(lskip==Request::SKIP_BREAK)
384: break;
385: }
1.1 paf 386: }
387: }
388:
1.129 paf 389: static void _eval(Request& r, MethodParams& params) {
390: Value& expr=params.as_junction(0, "need expression");
1.1 paf 391: // evaluate expresion
1.129 paf 392: Value& value_result=r.process_to_value(expr,
1.165 misha 393: false/*don't intercept string*/).as_expr_result();
1.129 paf 394: if(params.count()>1) {
1.177 misha 395: const String& fmt=params.as_string(1, "fmt must be string").trim();
396: if(fmt.is_empty()){
397: r.write_no_lang(value_result);
398: } else {
399: r.write_no_lang(String(format(value_result.as_double(), fmt.cstrm())));
400: }
1.91 paf 401: } else
1.129 paf 402: r.write_no_lang(value_result);
1.1 paf 403: }
404:
1.129 paf 405: static void _connect(Request& r, MethodParams& params) {
406: Value& url=params.as_no_junction(0, "url must not be code");
407: Value& body_code=params.as_junction(1, "body must be code");
1.1 paf 408:
1.129 paf 409: Table* protocol2driver_and_client=0;
1.197 misha 410: if(Value* sql=r.main_class.get_element(String(MAIN_SQL_NAME))) {
411: if(Value* element=sql->get_element(String(MAIN_SQL_DRIVERS_NAME))) {
1.113 paf 412: protocol2driver_and_client=element->get_table();
413: }
414: }
1.11 paf 415:
1.1 paf 416: // connect
1.142 paf 417: SQL_Connection* connection=SQL_driver_manager->get_connection(url.as_string(),
1.144 paf 418: protocol2driver_and_client,
1.180 misha 419: r.charsets.source().NAME().cstr(),
420: r.request_info.document_root);
1.1 paf 421:
1.214 moko 422: Temp_connection temp_connection(r, connection);
1.63 paf 423:
1.1 paf 424: // execute body
1.53 parser 425: try {
1.189 misha 426: r.process_write(body_code);
1.129 paf 427: connection->commit();
428: connection->close();
1.75 paf 429: } catch(...) { // process problem
1.129 paf 430: connection->rollback();
431: connection->close();
432: rethrow;
1.1 paf 433: }
434: }
435:
1.41 parser 436: #ifndef DOXYGEN
1.129 paf 437: class Switch_data: public PA_Object {
438: public:
439: Request& r;
1.181 misha 440: const String* searching_string;
441: double searching_double;
1.207 misha 442: bool searching_bool;
1.129 paf 443: Value* found;
444: Value* _default;
445: public:
446: Switch_data(Request& ar, Value& asearching):
1.181 misha 447: r(ar)
448: {
449: if(asearching.is_string() || asearching.is_void()){
450: searching_string=&asearching.as_string();
451: searching_double=0;
1.207 misha 452: searching_bool=false;
1.181 misha 453: } else {
454: searching_string=0;
455: searching_double=asearching.as_double();
1.207 misha 456: searching_bool=asearching.is_bool();
1.181 misha 457: }
458: }
1.28 parser 459: };
1.41 parser 460: #endif
1.129 paf 461: static void _switch(Request& r, MethodParams& params) {
462: Switch_data* data=new Switch_data(r, r.process_to_value(params[0]));
1.215 moko 463: Temp_hash_value<HashString<void*>, void*> 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();
1.207 misha 505: else if(data->searching_bool || value.is_bool())
506: matches=(data->searching_double != 0) == value.as_bool();
1.28 parser 507: else
1.181 misha 508: matches=data->searching_double == value.as_double();
1.82 paf 509:
1.181 misha 510: if(matches){
1.184 misha 511: data->found=code;
1.28 parser 512: break;
513: }
514: }
515: }
1.136 paf 516: #ifndef DOXYGEN
517: struct Try_catch_result {
518: StringOrValue processed_code;
519: const String* exception_should_be_handled;
520:
521: Try_catch_result(): exception_should_be_handled(0) {}
522: };
1.229 moko 523:
524: /// Auto-object used for temporary changing Request::skip.
525: class Temp_skip {
526: Request& frequest;
527: Request::Skip saved_skip;
528: public:
529: Temp_skip(Request& arequest) : frequest(arequest), saved_skip(arequest.get_skip()) {
530: arequest.set_skip(Request::SKIP_NOTHING);
531: }
532: ~Temp_skip() {
533: if(frequest.get_skip() == Request::SKIP_NOTHING)
534: frequest.set_skip(saved_skip);
535: }
536: };
1.136 paf 537: #endif
538:
539: /// used by ^try and ^cache, @returns $exception.handled[string] if any
540: template<class I>
1.228 moko 541: 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 542: Try_catch_result result;
1.179 misha 543:
1.228 moko 544: // minor bug: context not restored if only finally code is present, see #1062
1.136 paf 545: if(!catch_code) {
546: result.processed_code=body_code(r, info);
547: return result;
548: }
549:
550: // taking snapshot of try-context
551: Request_context_saver try_context(r);
552: try {
553: result.processed_code=body_code(r, info);
554: } catch(const Exception& e) {
1.230 moko 555: Request_context_saver throw_context(r); // remembering exception stack trace
556:
1.136 paf 557: Request::Exception_details details=r.get_details(e);
1.230 moko 558:
1.228 moko 559: try_context.restore(); // restoring try-context for code after try and catch-code
1.136 paf 560:
1.228 moko 561: {
562: Temp_value_element temp(r, *catch_code->get_junction()->method_frame, exception_var_name, &details.vhash);
1.229 moko 563: Temp_skip temp_skip(r);
1.228 moko 564: result.processed_code=r.process(*catch_code);
565: }
1.136 paf 566:
1.228 moko 567: // retriving $exception.handled
1.136 paf 568: Value* vhandled=details.vhash.hash().get(exception_handled_part_name);
569:
570: bool bhandled=false;
571: if(vhandled) {
572: if(vhandled->is_string()) { // not simple $exception.handled(1/0)?
1.228 moko 573: if(bhandled=could_be_handled_by_caller) { // and we can possibly handle it
1.160 paf 574: result.exception_should_be_handled=vhandled->get_string(); // considering 'recovered' and let the caller recover
575: }
576: } else
1.179 misha 577: bhandled=vhandled->as_bool();
1.136 paf 578: }
579:
1.230 moko 580: if(!bhandled){
581: throw_context.restore(); // restoring exception stack trace creared by try_context.restore()
1.136 paf 582: rethrow;
1.230 moko 583: }
1.136 paf 584: }
1.179 misha 585:
1.136 paf 586: return result;
587: }
1.28 parser 588:
1.222 moko 589: static StringOrValue process_try_body_code(Request& r, Value* body_code) {
590: return r.process(*body_code);
591: }
592:
1.63 paf 593: // cache--
594:
595: // consts
596:
1.152 paf 597: const int DATA_STRING_SERIALIZED_VERSION=0x0006;
1.63 paf 598:
599: // helper types
600:
601: #ifndef DOXYGEN
602: struct Data_string_serialized_prolog {
603: int version;
1.79 paf 604: time_t expires;
1.63 paf 605: };
606: #endif
607:
1.68 paf 608: void cache_delete(const String& file_spec) {
1.167 misha 609: file_delete(file_spec, false/*fail_on_problem*/);
1.63 paf 610: }
1.69 paf 611:
612: #ifndef DOXYGEN
1.135 paf 613: struct Cache_scope {
1.129 paf 614: public:
1.79 paf 615: time_t expires;
1.135 paf 616: const String* body_from_disk;
1.79 paf 617: };
1.69 paf 618: struct Locked_process_and_cache_put_action_info {
619: Request *r;
1.136 paf 620: Cache_scope *scope;
1.167 misha 621: Value* body_code;
622: Value* catch_code;
1.136 paf 623: const String* processed_code;
1.69 paf 624: };
625: #endif
1.136 paf 626:
627:
628:
629: static StringOrValue process_cache_body_code(Request& r, Value* body_code) {
1.153 paf 630: return StringOrValue(r.process_to_string(*body_code));
1.136 paf 631: }
632:
1.129 paf 633: /* @todo maybe network order worth spending some effort?
634: don't bothering myself with network byte order,
635: am not planning to be able to move resulting file across platforms
636: */
1.69 paf 637: static void locked_process_and_cache_put_action(int f, void *context) {
638: Locked_process_and_cache_put_action_info& info=
639: *static_cast<Locked_process_and_cache_put_action_info *>(context);
1.129 paf 640:
1.160 paf 641: const String* body_from_disk=info.scope->body_from_disk;
1.69 paf 642: // body->process
1.136 paf 643: Try_catch_result result=try_catch(*info.r,
644: process_cache_body_code, info.body_code,
1.160 paf 645: info.catch_code, body_from_disk!=0 /*we have something old=we can handle=recover later*/);
1.136 paf 646:
647: if(result.exception_should_be_handled) {
648: if(*result.exception_should_be_handled==CACHE_EXCEPTION_HANDLED_CACHE_NAME) {
1.160 paf 649: assert(body_from_disk);
650: info.processed_code=body_from_disk;
1.136 paf 651: } else
1.166 misha 652: throw Exception(PARSER_RUNTIME,
1.136 paf 653: result.exception_should_be_handled,
1.219 moko 654: "$" EXCEPTION_VAR_NAME "." EXCEPTION_HANDLED_PART_NAME " value must be "
655: "either boolean or string '" CACHE_EXCEPTION_HANDLED_CACHE_NAME "'");
1.136 paf 656: } else
657: info.processed_code=&result.processed_code.as_string();
1.69 paf 658:
1.79 paf 659: // expiration time not spoiled by ^cache(0) or something?
1.136 paf 660: if(info.scope->expires > time(0)) {
1.79 paf 661: // string -serialize> buffer
1.136 paf 662: String::Cm serialized=info.processed_code->serialize(
1.129 paf 663: sizeof(Data_string_serialized_prolog));
1.79 paf 664: Data_string_serialized_prolog& prolog=
1.129 paf 665: *reinterpret_cast<Data_string_serialized_prolog *>(serialized.str);
1.79 paf 666: prolog.version=DATA_STRING_SERIALIZED_VERSION;
1.136 paf 667: prolog.expires=info.scope->expires;
1.79 paf 668:
669: // buffer -write> file
1.129 paf 670: write(f, serialized.str, serialized.length);
1.79 paf 671: } else // expired!
1.136 paf 672: info.scope->expires=0; // flag it so that could be easily checked by caller
1.69 paf 673: }
1.129 paf 674: const String* locked_process_and_cache_put(Request& r,
1.128 paf 675: Value& body_code,
1.136 paf 676: Value* catch_code,
677: Cache_scope& scope,
678: const String& file_spec)
679: {
1.140 paf 680: Locked_process_and_cache_put_action_info info={&r, &scope, &body_code, catch_code, 0};
1.69 paf 681:
1.129 paf 682: const String* result=file_write_action_under_lock(
1.69 paf 683: file_spec,
1.168 misha 684: "cache_put",
685: locked_process_and_cache_put_action,
686: &info,
1.69 paf 687: false/*as_text*/,
688: false/*do_append*/,
1.173 misha 689: false/*block == don't wait till other thread release lock*/,
690: false/*dun throw exception if lock failed*/) ? info.processed_code: 0;
1.168 misha 691:
1.100 paf 692: time_t now=time(0);
1.136 paf 693: if(scope.expires<=now)
1.79 paf 694: cache_delete(file_spec);
695: return result;
1.63 paf 696: }
1.229 moko 697:
1.137 paf 698: #ifndef DOXYGEN
1.135 paf 699: struct Cache_get_result {
700: const String* body;
701: bool expired;
1.137 paf 702: };
703: #endif
1.229 moko 704:
1.137 paf 705: static Cache_get_result cache_get(Request_charsets& charsets, const String& file_spec, time_t now) {
1.140 paf 706: Cache_get_result result={0, false};
1.135 paf 707:
1.129 paf 708: File_read_result file=file_read(charsets, file_spec,
1.63 paf 709: false/*as_text*/,
1.129 paf 710: 0, //no params
711: false/*fail_on_read_problem*/);
712: if(file.success && file.length/* ignore reads which are empty due to
1.72 paf 713: non-unary open+lockEX conflict with lockSH */) {
1.129 paf 714:
1.72 paf 715: Data_string_serialized_prolog& prolog=
1.129 paf 716: *reinterpret_cast<Data_string_serialized_prolog *>(file.str);
1.63 paf 717:
1.135 paf 718: String* body=new String;
1.72 paf 719: if(
1.129 paf 720: file.length>=sizeof(Data_string_serialized_prolog)
1.135 paf 721: && prolog.version==DATA_STRING_SERIALIZED_VERSION) {
722: if(body->deserialize(sizeof(Data_string_serialized_prolog), file.str, file.length)) {
723: result.body=body;
724: result.expired=prolog.expires <= now;
725: }
726: }
1.72 paf 727: }
1.63 paf 728:
1.135 paf 729: return result;
1.63 paf 730: }
1.129 paf 731: static time_t as_expires(Request& r, MethodParams& params,
1.79 paf 732: int index, time_t now) {
733: time_t result;
1.197 misha 734: if(Value* vdate=params[index].as(VDATE_TYPE))
1.220 moko 735: result=(time_t)(static_cast<VDate*>(vdate)->get_time());
1.79 paf 736: else
1.129 paf 737: result=now+(time_t)params.as_double(index, "lifespan must be date or number", r);
1.79 paf 738:
739: return result;
740: }
1.229 moko 741:
1.129 paf 742: static const String& as_file_spec(Request& r, MethodParams& params, int index) {
743: return r.absolute(params.as_string(index, "filespec must be string"));
1.79 paf 744: }
1.229 moko 745:
1.129 paf 746: static void _cache(Request& r, MethodParams& params) {
1.173 misha 747: if(params.count()==0) {
748: // ^cache[] -- return current expiration time
1.158 paf 749: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
750: if(!scope)
1.221 moko 751: throw Exception(PARSER_RUNTIME, 0, "expire-time get without cache");
752: r.write_no_lang(*new VDate((pa_time_t)scope->expires));
1.158 paf 753: return;
754: }
755:
1.79 paf 756: time_t now=time(0);
757:
1.129 paf 758: if(params.count()==1) {
1.173 misha 759: // ^cache[filename] ^cache(seconds) ^cache[expires date]
1.129 paf 760: if(params[0].is_string()) { // filename?
1.79 paf 761: cache_delete(as_file_spec(r, params, 0));
762: return;
763: }
764:
765: // secods|expires date
1.135 paf 766: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
767: if(!scope)
1.166 misha 768: throw Exception(PARSER_RUNTIME,
1.129 paf 769: 0,
1.79 paf 770: "expire-time reducing instruction without cache");
771:
1.129 paf 772: time_t expires=as_expires(r, params, 0, now);
1.135 paf 773: if(expires < scope->expires)
774: scope->expires=expires;
1.79 paf 775:
776: return;
1.149 paf 777: } else if(params.count()<3)
1.166 misha 778: throw Exception(PARSER_RUNTIME,
1.149 paf 779: 0,
780: "invalid number of parameters");
1.63 paf 781:
782: // file_spec, expires, body code
1.172 misha 783: const String& file_spec=as_file_spec(r, params, 0);
1.65 paf 784:
1.141 paf 785: Cache_scope scope={as_expires(r, params, 1, now), 0};
1.135 paf 786:
1.215 moko 787: Temp_hash_value<HashString<void*>, void*> cache_scope_setter(&r.classes_conf, cache_data_name, &scope);
1.136 paf 788: Value& body_code=params.as_junction(2, "body_code must be code");
789: Value* catch_code=0;
790: if(params.count()>3)
791: catch_code=¶ms.as_junction(3, "catch_code must be code");
1.63 paf 792:
1.168 misha 793: if(scope.expires>now) {
794: Cache_get_result cached=cache_get(r.charsets, file_spec, now);
1.69 paf 795:
1.168 misha 796: if(cached.body) { // have cached copy
1.174 misha 797: if(cached.expired) {
798: scope.body_from_disk=cached.body; // storing for user to retrive it with ^cache[]
799: } else {
800: // and it's not expired yet write it out
1.168 misha 801: r.write_assign_lang(*cached.body);
802: // happy with it
803: return;
804: }
805: }
806:
807: // no cached info or it's already expired
1.173 misha 808:
809: // trying to process it under lock and store result in file
1.174 misha 810: const String* processed_body=locked_process_and_cache_put(r, body_code, catch_code, scope, file_spec);
1.173 misha 811: if(processed_body){
1.174 misha 812: // write it out
813: r.write_assign_lang(*processed_body);
814: // happy with it
815: return;
1.173 misha 816: } else {
817: // we fail while get exclusive lock. nvm, we just execute body_code a bit later
1.174 misha 818: }
1.69 paf 819: } else {
1.79 paf 820: // instructed not to cache; forget cached copy
1.68 paf 821: cache_delete(file_spec);
1.69 paf 822: }
1.168 misha 823:
1.222 moko 824: // process without caching
825: if(catch_code){
826: Try_catch_result result=try_catch(r, process_try_body_code, &body_code, catch_code);
827: r.write_assign_lang(result.processed_code);
828: } else {
829: const String& processed_body=r.process_to_string(body_code);
830: r.write_assign_lang(processed_body);
831: }
1.63 paf 832: }
833:
1.129 paf 834: static void _try_operator(Request& r, MethodParams& params) {
835: Value& body_code=params.as_junction(0, "body_code must be code");
836: Value& catch_code=params.as_junction(1, "catch_code must be code");
1.179 misha 837: Value* finally_code=(params.count()==3) ? ¶ms.as_junction(2, "finally_code must be code") : 0;
838:
839: Try_catch_result result;
840: StringOrValue finally_result;
1.229 moko 841:
1.179 misha 842: try{
1.229 moko 843: // process try and catch code
1.222 moko 844: result=try_catch(r, process_try_body_code, &body_code, &catch_code);
1.179 misha 845: } catch(...){
1.229 moko 846: // process finally code but ignore the result
847: if(finally_code){
848: Temp_skip temp(r);
1.179 misha 849: finally_result=r.process(*finally_code);
1.229 moko 850: }
1.179 misha 851: rethrow;
852: }
1.74 paf 853:
1.229 moko 854: // process finally code
855: if(finally_code){
856: Temp_skip temp(r);
1.179 misha 857: finally_result=r.process(*finally_code);
1.229 moko 858: }
859:
860: // no exception in try, catch or finally, writing the result
1.123 paf 861:
1.136 paf 862: // write out processed body_code or catch_code
863: r.write_pass_lang(result.processed_code);
1.179 misha 864:
865: // write out processed finally code
866: if(finally_code)
867: r.write_pass_lang(finally_result);
1.74 paf 868: }
869:
1.138 paf 870: static void _throw_operator(Request&, MethodParams& params) {
1.178 misha 871: if(params.count()==1 && !params[0].is_string()) {
1.129 paf 872: if(HashStringValue *hash=params[0].get_hash()) {
873: const char* type=0;
874: if(Value* value=hash->get(exception_type_part_name))
1.78 paf 875: type=value->as_string().cstr();
1.129 paf 876: const String* source=0;
877: if(Value* value=hash->get(exception_source_part_name))
1.74 paf 878: source=&value->as_string();
1.138 paf 879: const char* comment=0;
1.129 paf 880: if(Value* value=hash->get(exception_comment_part_name))
1.74 paf 881: comment=value->as_string().cstr();
882:
1.78 paf 883: throw Exception(type,
1.129 paf 884: source?source:0,
885: "%s", comment?comment:"");
1.74 paf 886: } else
1.166 misha 887: throw Exception(PARSER_RUNTIME,
1.129 paf 888: 0,
1.178 misha 889: "one-param version has hash or string param");
1.74 paf 890: } else {
1.129 paf 891: const char* type=params.as_string(0, "type must be string").cstr();
1.178 misha 892: const String* source=params.count()>1? ¶ms.as_string(1, "source must be string"):0;
893: const char* comment=params.count()>2? params.as_string(2, "comment must be string").cstr():0;
894: throw Exception(type, source, "%s", comment?comment:"");
1.74 paf 895: }
1.132 paf 896: }
1.129 paf 897:
1.150 paf 898: static void _sleep_operator(Request& r, MethodParams& params) {
899: double seconds=params.as_double(0, "seconds must be double", r);
1.206 moko 900: if(seconds>0)
901: pa_sleep((int)trunc(seconds), (int)trunc((seconds-trunc(seconds))*1000000));
1.150 paf 902: }
903:
1.129 paf 904: #if defined(WIN32) && defined(_DEBUG)
905: # define PA_BPT
1.138 paf 906: static void _bpt(Request&, MethodParams&) {
1.129 paf 907: _asm int 3;
908: }
909: #endif
910:
1.10 paf 911: // constructor
912:
1.226 moko 913: VClassMAIN::VClassMAIN(): VClass(MAIN_CLASS_NAME) {
1.129 paf 914:
915: #ifdef PA_BPT
916: // ^bpt[]
917: add_native_method("bpt", Method::CT_ANY, _bpt, 0, 0);
918: #endif
1.121 paf 919:
1.1 paf 920: // ^if(condition){code-when-true}
921: // ^if(condition){code-when-true}{code-when-false}
1.200 moko 922: // ^if(condition){code-when-true} (another condition){code-when-true} ... {code-when-false}
923: add_native_method("if", Method::CT_ANY, _if, 2, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 924:
1.194 misha 925: // ^untaint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
926: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 927:
1.194 misha 928: // ^taint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
929: add_native_method("taint", Method::CT_ANY, _taint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 930:
1.205 moko 931: // ^apply-taint[untaint lang][string]
932: add_native_method("apply-taint", Method::CT_ANY, _apply_taint, 1, 2, Method::CO_WITHOUT_FRAME);
933:
1.216 moko 934: // ^process{code}
935: // ^process[context]{code}[options hash]
1.146 paf 936: add_native_method("process", Method::CT_ANY, _process, 1, 3);
1.1 paf 937:
938: // ^rem{code}
1.185 misha 939: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 940:
941: // ^while(condition){code}
1.185 misha 942: add_native_method("while", Method::CT_ANY, _while, 2, 3, Method::CO_WITHOUT_FRAME);
1.1 paf 943:
1.216 moko 944: // ^use[file[;options hash]]
945: add_native_method("use", Method::CT_ANY, _use, 1, 2);
1.1 paf 946:
1.164 paf 947: // ^break[]
1.227 moko 948: // ^break(condition)
949: add_native_method("break", Method::CT_ANY, _break, 0, 1, Method::CO_WITHOUT_FRAME);
1.185 misha 950:
1.164 paf 951: // ^continue[]
1.227 moko 952: // ^continue(condition)
953: add_native_method("continue", Method::CT_ANY, _continue, 0, 1, Method::CO_WITHOUT_FRAME);
1.185 misha 954:
1.54 paf 955: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.185 misha 956: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1, Method::CO_WITHOUT_WCONTEXT);
1.1 paf 957:
958: // ^eval(expr)
959: // ^eval(expr)[format]
1.185 misha 960: add_native_method("eval", Method::CT_ANY, _eval, 1, 2, Method::CO_WITHOUT_FRAME);
1.52 parser 961:
1.1 paf 962: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 963: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
964:
1.63 paf 965:
1.136 paf 966: // ^cache[file_spec](time){code}[{catch code}] time=0 no cache
1.65 paf 967: // ^cache[file_spec] delete cache
1.161 paf 968: // ^cache[] get current expiration time
969: add_native_method("cache", Method::CT_ANY, _cache, 0, 4);
1.63 paf 970:
1.28 parser 971: // switch
972:
973: // ^switch[value]{cases}
1.185 misha 974: add_native_method("switch", Method::CT_ANY, _switch, 2, 2, Method::CO_WITHOUT_FRAME);
1.28 parser 975:
976: // ^case[value]{code}
1.185 misha 977: add_native_method("case", Method::CT_ANY, _case, 2, 10000, Method::CO_WITHOUT_FRAME);
1.74 paf 978:
979: // try-catch
980:
981: // ^try{code}{catch code}
1.185 misha 982: add_native_method("try", Method::CT_ANY, _try_operator, 2, 3, Method::CO_WITHOUT_FRAME);
1.74 paf 983: // ^throw[$exception hash]
984: // ^throw[type;source;comment]
985: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
986:
1.150 paf 987: add_native_method("sleep", Method::CT_ANY, _sleep_operator, 1, 1);
1.10 paf 988: }
1.11 paf 989:
990: // constructor & configurator
1.1 paf 991:
1.129 paf 992: VStateless_class& VClassMAIN_create() {
993: return *new VClassMAIN;
1.1 paf 994: }
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