Annotation of parser3/src/classes/op.C, revision 1.232
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:
1.232 ! moko 21: volatile const char * IDENT_OP_C="$Id: op.C,v 1.231 2016/09/14 14:02:21 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)
1.232 ! moko 163: throw Exception(PARSER_RUNTIME, 0, "no target class");
1.114 paf 164:
1.73 paf 165: // temporary remove language change
1.192 misha 166: Temp_lang temp_lang(r, String::L_PARSER_CODE);
1.1 paf 167: // temporary zero @main so to maybe-replace it in processed code
1.129 paf 168: Temp_method temp_method_main(*target_class, main_method_name, 0);
169:
170: const String* main_alias=0;
1.146 paf 171: const String* file_alias=0;
172: int line_no_alias_offset=0;
1.216 moko 173: bool allow_class_replace=false;
1.211 misha 174:
175: size_t options_index=index+1;
176: if(options_index<params.count())
177: if(HashStringValue* options=params.as_hash(options_index)) {
1.216 moko 178:
1.211 misha 179: int valid_options=0;
1.216 moko 180: for(HashStringValue::Iterator i(*options); i; i.next() ){
181:
182: String::Body key=i.key();
183: Value* value=i.value();
184:
185: if(key == "main") {
186: valid_options++;
187: main_alias=&value->as_string();
188: } else if(key == "file") {
189: valid_options++;
190: file_alias=&value->as_string();
191: } else if(key == "lineno") {
192: valid_options++;
193: line_no_alias_offset=value->as_int();
194: } else if(key == "replace") {
195: valid_options++;
196: allow_class_replace=r.process_to_value(*value).as_bool();
197: }
1.211 misha 198: }
1.216 moko 199:
1.211 misha 200: if(valid_options!=options->count())
201: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
1.146 paf 202: }
1.129 paf 203:
1.232 ! moko 204: uint processe_file_no=file_alias ? r.register_file(r.absolute(*file_alias)) : pseudo_file_no__process;
1.146 paf 205: // process...{string}
206: Value& vjunction=params.as_junction(index, "body must be code");
207: // evaluate source to process
208: const String& source=r.process_to_string(vjunction);
1.216 moko 209:
210: Temp_class_replace class_replace(r, allow_class_replace);
211:
1.232 ! moko 212: r.use_buf(*target_class, source.untaint_cstr(String::L_AS_IS, r.connection(false)), main_alias, processe_file_no, line_no_alias_offset);
1.1 paf 213:
1.73 paf 214: // main_method
1.129 paf 215: main_method=target_class->get_method(main_method_name);
1.73 paf 216: }
217: // after restoring current-request-lang
218: // maybe-execute @main[]
219: if(main_method) {
1.202 moko 220: VMethodFrame frame(*main_method, r.get_method_frame()->caller(), *target_self);
221: frame.empty_params();
1.203 moko 222: r.op_call(frame);
223: r.write_pass_lang(frame.result());
1.1 paf 224: }
225: }
226:
1.138 paf 227: static void _rem(Request&, MethodParams& params) {
1.129 paf 228: params.as_junction(0, "body must be code");
1.1 paf 229: }
230:
1.129 paf 231: static void _while(Request& r, MethodParams& params) {
1.196 misha 232: InCycle temp(r);
1.164 paf 233:
1.170 misha 234: Value& vcondition=params.as_expression(0, "condition must be number, bool or expression");
235:
1.162 paf 236: Value& body_code=params.as_junction(1, "body must be code");
237: Value* delim_maybe_code=params.count()>2?¶ms[2]:0;
1.1 paf 238:
239: // while...
240: int endless_loop_count=0;
1.186 misha 241: if(delim_maybe_code){ // delimiter set
1.185 misha 242: bool need_delim=false;
243: while(true) {
244: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
245: throw Exception(PARSER_RUNTIME,
246: 0,
247: "endless loop detected");
248:
249: if(!r.process_to_value(vcondition, false/*don't intercept string*/).as_bool())
250: break;
1.1 paf 251:
1.185 misha 252: StringOrValue sv_processed=r.process(body_code);
253: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 misha 254:
1.185 misha 255: const String* s_processed=sv_processed.get_string();
1.186 misha 256: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 257: if(need_delim) // need delim & iteration produced string?
258: r.write_pass_lang(r.process(*delim_maybe_code));
259: else
260: need_delim=true;
261: }
262: r.write_pass_lang(sv_processed);
1.1 paf 263:
1.185 misha 264: if(lskip==Request::SKIP_BREAK)
265: break;
1.162 paf 266: }
1.185 misha 267: } else {
268: while(true) {
269: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
270: throw Exception(PARSER_RUNTIME,
271: 0,
272: "endless loop detected");
273:
274: if(!r.process_to_value(vcondition, false/*don't intercept string*/).as_bool())
275: break;
1.164 paf 276:
1.185 misha 277: r.process_write(body_code);
278: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
279:
280: if(lskip==Request::SKIP_BREAK)
281: break;
282: }
1.1 paf 283: }
284: }
285:
1.129 paf 286: static void _use(Request& r, MethodParams& params) {
1.171 misha 287: Value& vfile=params.as_no_junction(0, FILE_NAME_MUST_NOT_BE_CODE);
1.199 misha 288:
1.216 moko 289: bool allow_class_replace=false;
290:
291: if(params.count()==2)
292: if(HashStringValue* options=params.as_hash(1)) {
293: int valid_options=0;
294: for(HashStringValue::Iterator i(*options); i; i.next() ){
295:
296: String::Body key=i.key();
297: Value* value=i.value();
298:
299: if(key == "replace") {
300: valid_options++;
301: allow_class_replace=r.process_to_value(*value).as_bool();
302: }
303:
304: if(valid_options!=options->count())
305: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
306: }
307: }
308:
309: Temp_class_replace class_replace(r, allow_class_replace);
310:
1.199 misha 311: // _use could be called from the parser3 method only, so caller is always defined
1.202 moko 312: r.use_file(r.main_class, vfile.as_string(), r.get_method_filename(&r.get_method_frame()->caller()->method));
1.1 paf 313: }
314:
1.164 paf 315: static void set_skip(Request& r, Request::Skip askip) {
1.196 misha 316: if(!r.get_in_cycle())
1.227 moko 317: throw Exception(askip==Request::SKIP_BREAK ? "parser.break" : "parser.continue", 0, "without cycle");
1.164 paf 318: r.set_skip(askip);
319: }
320:
1.227 moko 321: static void _break(Request& r, MethodParams& params) {
322: if(!params.count() || params.as_bool(0, "condition must be expression", r)) set_skip(r, Request::SKIP_BREAK);
1.164 paf 323: }
324:
1.227 moko 325: static void _continue(Request& r, MethodParams& params) {
326: if(!params.count() || params.as_bool(0, "condition must be expression", r)) set_skip(r, Request::SKIP_CONTINUE);
1.164 paf 327: }
328:
1.129 paf 329: static void _for(Request& r, MethodParams& params) {
1.196 misha 330: InCycle temp(r);
1.164 paf 331:
1.129 paf 332: const String& var_name=params.as_string(0, "var name must be string");
333: int from=params.as_int(1, "from must be int", r);
334: int to=params.as_int(2, "to must be int", r);
1.186 misha 335: Value& body_code=params.as_junction(3, "body must be code");
1.129 paf 336: Value* delim_maybe_code=params.count()>4?¶ms[4]:0;
1.1 paf 337:
1.57 paf 338: if(to-from>=MAX_LOOPS) // too long loop?
1.166 misha 339: throw Exception(PARSER_RUNTIME,
1.129 paf 340: 0,
1.57 paf 341: "endless loop detected");
342:
1.129 paf 343: VInt* vint=new VInt(0);
1.154 paf 344:
345: VMethodFrame& caller=*r.get_method_frame()->caller();
1.218 moko 346: r.put_element(caller, var_name, vint);
1.186 misha 347: if(delim_maybe_code){ // delimiter set
1.185 misha 348: bool need_delim=false;
349:
350: for(int i=from; i<=to; i++) {
351: vint->set_int(i);
352:
353: StringOrValue sv_processed=r.process(body_code);
354: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 misha 355:
1.185 misha 356: const String* s_processed=sv_processed.get_string();
1.186 misha 357: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 358: if(need_delim) // need delim & iteration produced string?
359: r.write_pass_lang(r.process(*delim_maybe_code));
360: else
361: need_delim=true;
362: }
363: r.write_pass_lang(sv_processed);
1.1 paf 364:
1.185 misha 365: if(lskip==Request::SKIP_BREAK)
366: break;
1.1 paf 367: }
1.185 misha 368: } else {
369: for(int i=from; i<=to; i++) {
370: vint->set_int(i);
371:
372: r.process_write(body_code);
373: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.164 paf 374:
1.185 misha 375: if(lskip==Request::SKIP_BREAK)
376: break;
377: }
1.1 paf 378: }
379: }
380:
1.129 paf 381: static void _eval(Request& r, MethodParams& params) {
382: Value& expr=params.as_junction(0, "need expression");
1.1 paf 383: // evaluate expresion
1.129 paf 384: Value& value_result=r.process_to_value(expr,
1.165 misha 385: false/*don't intercept string*/).as_expr_result();
1.129 paf 386: if(params.count()>1) {
1.177 misha 387: const String& fmt=params.as_string(1, "fmt must be string").trim();
388: if(fmt.is_empty()){
389: r.write_no_lang(value_result);
390: } else {
391: r.write_no_lang(String(format(value_result.as_double(), fmt.cstrm())));
392: }
1.91 paf 393: } else
1.129 paf 394: r.write_no_lang(value_result);
1.1 paf 395: }
396:
1.129 paf 397: static void _connect(Request& r, MethodParams& params) {
398: Value& url=params.as_no_junction(0, "url must not be code");
399: Value& body_code=params.as_junction(1, "body must be code");
1.1 paf 400:
1.129 paf 401: Table* protocol2driver_and_client=0;
1.197 misha 402: if(Value* sql=r.main_class.get_element(String(MAIN_SQL_NAME))) {
403: if(Value* element=sql->get_element(String(MAIN_SQL_DRIVERS_NAME))) {
1.113 paf 404: protocol2driver_and_client=element->get_table();
405: }
406: }
1.11 paf 407:
1.1 paf 408: // connect
1.142 paf 409: SQL_Connection* connection=SQL_driver_manager->get_connection(url.as_string(),
1.144 paf 410: protocol2driver_and_client,
1.180 misha 411: r.charsets.source().NAME().cstr(),
412: r.request_info.document_root);
1.1 paf 413:
1.214 moko 414: Temp_connection temp_connection(r, connection);
1.63 paf 415:
1.1 paf 416: // execute body
1.53 parser 417: try {
1.189 misha 418: r.process_write(body_code);
1.129 paf 419: connection->commit();
420: connection->close();
1.75 paf 421: } catch(...) { // process problem
1.129 paf 422: connection->rollback();
423: connection->close();
424: rethrow;
1.1 paf 425: }
426: }
427:
1.41 parser 428: #ifndef DOXYGEN
1.129 paf 429: class Switch_data: public PA_Object {
430: public:
431: Request& r;
1.181 misha 432: const String* searching_string;
433: double searching_double;
1.207 misha 434: bool searching_bool;
1.129 paf 435: Value* found;
436: Value* _default;
437: public:
438: Switch_data(Request& ar, Value& asearching):
1.181 misha 439: r(ar)
440: {
441: if(asearching.is_string() || asearching.is_void()){
442: searching_string=&asearching.as_string();
443: searching_double=0;
1.207 misha 444: searching_bool=false;
1.181 misha 445: } else {
446: searching_string=0;
447: searching_double=asearching.as_double();
1.207 misha 448: searching_bool=asearching.is_bool();
1.181 misha 449: }
450: }
1.28 parser 451: };
1.41 parser 452: #endif
1.129 paf 453: static void _switch(Request& r, MethodParams& params) {
454: Switch_data* data=new Switch_data(r, r.process_to_value(params[0]));
1.215 moko 455: Temp_hash_value<HashString<void*>, void*> switch_data_setter(&r.classes_conf, switch_data_name, data);
1.28 parser 456:
1.129 paf 457: Value& cases_code=params.as_junction(1, "switch cases must be code");
1.82 paf 458: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
459: // because of stacked WWrapper used there as wcontext
1.84 paf 460: r.process(cases_code, true/*intercept_string*/);
1.147 paf 461: if(Value* selected_code=data->found? data->found: data->_default)
1.107 paf 462: r.write_pass_lang(r.process(*selected_code));
1.28 parser 463: }
464:
1.129 paf 465: static void _case(Request& r, MethodParams& params) {
466: Switch_data* data=static_cast<Switch_data*>(r.classes_conf.get(switch_data_name));
1.38 parser 467: if(!data)
1.166 misha 468: throw Exception(PARSER_RUNTIME,
1.129 paf 469: 0,
1.38 parser 470: "without switch");
1.28 parser 471:
1.181 misha 472: if(data->found) // matches already was found
473: return;
474:
1.129 paf 475: int count=params.count();
1.184 misha 476: Value* code=¶ms.as_expression(--count, "case result must be code");
477:
478: #ifdef USE_DESTRUCTORS
479: Junction *j=code->get_junction();
480: if (j){
481: code=new VJunction(j->self,j->method,j->method_frame,j->rcontext,j->wcontext,j->code);
482: if (j->wcontext) j->wcontext->attach_junction((VJunction *)code);
483: }
484: #endif
1.83 paf 485:
1.181 misha 486: for(int i=0; i<count; i++){
1.129 paf 487: Value& value=r.process_to_value(params[i]);
1.28 parser 488:
1.181 misha 489: if(value.is_string() && value.as_string() == CASE_DEFAULT_VALUE){
1.184 misha 490: data->_default=code;
1.181 misha 491: continue;
1.28 parser 492: }
493:
494: bool matches;
1.181 misha 495: if(data->searching_string)
496: matches=(*data->searching_string) == value.as_string();
1.207 misha 497: else if(data->searching_bool || value.is_bool())
498: matches=(data->searching_double != 0) == value.as_bool();
1.28 parser 499: else
1.181 misha 500: matches=data->searching_double == value.as_double();
1.82 paf 501:
1.181 misha 502: if(matches){
1.184 misha 503: data->found=code;
1.28 parser 504: break;
505: }
506: }
507: }
1.136 paf 508: #ifndef DOXYGEN
509: struct Try_catch_result {
510: StringOrValue processed_code;
511: const String* exception_should_be_handled;
512:
513: Try_catch_result(): exception_should_be_handled(0) {}
514: };
1.229 moko 515:
516: /// Auto-object used for temporary changing Request::skip.
517: class Temp_skip {
518: Request& frequest;
519: Request::Skip saved_skip;
520: public:
521: Temp_skip(Request& arequest) : frequest(arequest), saved_skip(arequest.get_skip()) {
522: arequest.set_skip(Request::SKIP_NOTHING);
523: }
524: ~Temp_skip() {
525: if(frequest.get_skip() == Request::SKIP_NOTHING)
526: frequest.set_skip(saved_skip);
527: }
528: };
1.136 paf 529: #endif
530:
531: /// used by ^try and ^cache, @returns $exception.handled[string] if any
532: template<class I>
1.228 moko 533: 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 534: Try_catch_result result;
1.179 misha 535:
1.228 moko 536: // minor bug: context not restored if only finally code is present, see #1062
1.136 paf 537: if(!catch_code) {
538: result.processed_code=body_code(r, info);
539: return result;
540: }
541:
542: // taking snapshot of try-context
543: Request_context_saver try_context(r);
544: try {
545: result.processed_code=body_code(r, info);
546: } catch(const Exception& e) {
1.230 moko 547: Request_context_saver throw_context(r); // remembering exception stack trace
548:
1.136 paf 549: Request::Exception_details details=r.get_details(e);
1.230 moko 550:
1.228 moko 551: try_context.restore(); // restoring try-context for code after try and catch-code
1.136 paf 552:
1.228 moko 553: {
554: Temp_value_element temp(r, *catch_code->get_junction()->method_frame, exception_var_name, &details.vhash);
1.229 moko 555: Temp_skip temp_skip(r);
1.228 moko 556: result.processed_code=r.process(*catch_code);
557: }
1.136 paf 558:
1.228 moko 559: // retriving $exception.handled
1.136 paf 560: Value* vhandled=details.vhash.hash().get(exception_handled_part_name);
561:
562: bool bhandled=false;
563: if(vhandled) {
564: if(vhandled->is_string()) { // not simple $exception.handled(1/0)?
1.228 moko 565: if(bhandled=could_be_handled_by_caller) { // and we can possibly handle it
1.160 paf 566: result.exception_should_be_handled=vhandled->get_string(); // considering 'recovered' and let the caller recover
567: }
568: } else
1.179 misha 569: bhandled=vhandled->as_bool();
1.136 paf 570: }
571:
1.230 moko 572: if(!bhandled){
573: throw_context.restore(); // restoring exception stack trace creared by try_context.restore()
1.136 paf 574: rethrow;
1.230 moko 575: }
1.136 paf 576: }
1.179 misha 577:
1.136 paf 578: return result;
579: }
1.28 parser 580:
1.222 moko 581: static StringOrValue process_try_body_code(Request& r, Value* body_code) {
582: return r.process(*body_code);
583: }
584:
1.63 paf 585: // cache--
586:
587: // consts
588:
1.152 paf 589: const int DATA_STRING_SERIALIZED_VERSION=0x0006;
1.63 paf 590:
591: // helper types
592:
593: #ifndef DOXYGEN
594: struct Data_string_serialized_prolog {
595: int version;
1.79 paf 596: time_t expires;
1.63 paf 597: };
598: #endif
599:
1.68 paf 600: void cache_delete(const String& file_spec) {
1.167 misha 601: file_delete(file_spec, false/*fail_on_problem*/);
1.63 paf 602: }
1.69 paf 603:
604: #ifndef DOXYGEN
1.135 paf 605: struct Cache_scope {
1.129 paf 606: public:
1.79 paf 607: time_t expires;
1.135 paf 608: const String* body_from_disk;
1.79 paf 609: };
1.69 paf 610: struct Locked_process_and_cache_put_action_info {
611: Request *r;
1.136 paf 612: Cache_scope *scope;
1.167 misha 613: Value* body_code;
614: Value* catch_code;
1.136 paf 615: const String* processed_code;
1.69 paf 616: };
617: #endif
1.136 paf 618:
619:
620:
621: static StringOrValue process_cache_body_code(Request& r, Value* body_code) {
1.153 paf 622: return StringOrValue(r.process_to_string(*body_code));
1.136 paf 623: }
624:
1.129 paf 625: /* @todo maybe network order worth spending some effort?
626: don't bothering myself with network byte order,
627: am not planning to be able to move resulting file across platforms
628: */
1.69 paf 629: static void locked_process_and_cache_put_action(int f, void *context) {
630: Locked_process_and_cache_put_action_info& info=
631: *static_cast<Locked_process_and_cache_put_action_info *>(context);
1.129 paf 632:
1.160 paf 633: const String* body_from_disk=info.scope->body_from_disk;
1.69 paf 634: // body->process
1.136 paf 635: Try_catch_result result=try_catch(*info.r,
636: process_cache_body_code, info.body_code,
1.160 paf 637: info.catch_code, body_from_disk!=0 /*we have something old=we can handle=recover later*/);
1.136 paf 638:
639: if(result.exception_should_be_handled) {
640: if(*result.exception_should_be_handled==CACHE_EXCEPTION_HANDLED_CACHE_NAME) {
1.160 paf 641: assert(body_from_disk);
642: info.processed_code=body_from_disk;
1.136 paf 643: } else
1.166 misha 644: throw Exception(PARSER_RUNTIME,
1.136 paf 645: result.exception_should_be_handled,
1.219 moko 646: "$" EXCEPTION_VAR_NAME "." EXCEPTION_HANDLED_PART_NAME " value must be "
647: "either boolean or string '" CACHE_EXCEPTION_HANDLED_CACHE_NAME "'");
1.136 paf 648: } else
649: info.processed_code=&result.processed_code.as_string();
1.69 paf 650:
1.79 paf 651: // expiration time not spoiled by ^cache(0) or something?
1.136 paf 652: if(info.scope->expires > time(0)) {
1.79 paf 653: // string -serialize> buffer
1.136 paf 654: String::Cm serialized=info.processed_code->serialize(
1.129 paf 655: sizeof(Data_string_serialized_prolog));
1.79 paf 656: Data_string_serialized_prolog& prolog=
1.129 paf 657: *reinterpret_cast<Data_string_serialized_prolog *>(serialized.str);
1.79 paf 658: prolog.version=DATA_STRING_SERIALIZED_VERSION;
1.136 paf 659: prolog.expires=info.scope->expires;
1.79 paf 660:
661: // buffer -write> file
1.129 paf 662: write(f, serialized.str, serialized.length);
1.79 paf 663: } else // expired!
1.136 paf 664: info.scope->expires=0; // flag it so that could be easily checked by caller
1.69 paf 665: }
1.129 paf 666: const String* locked_process_and_cache_put(Request& r,
1.128 paf 667: Value& body_code,
1.136 paf 668: Value* catch_code,
669: Cache_scope& scope,
670: const String& file_spec)
671: {
1.140 paf 672: Locked_process_and_cache_put_action_info info={&r, &scope, &body_code, catch_code, 0};
1.69 paf 673:
1.129 paf 674: const String* result=file_write_action_under_lock(
1.69 paf 675: file_spec,
1.168 misha 676: "cache_put",
677: locked_process_and_cache_put_action,
678: &info,
1.69 paf 679: false/*as_text*/,
680: false/*do_append*/,
1.173 misha 681: false/*block == don't wait till other thread release lock*/,
682: false/*dun throw exception if lock failed*/) ? info.processed_code: 0;
1.168 misha 683:
1.100 paf 684: time_t now=time(0);
1.136 paf 685: if(scope.expires<=now)
1.79 paf 686: cache_delete(file_spec);
687: return result;
1.63 paf 688: }
1.229 moko 689:
1.137 paf 690: #ifndef DOXYGEN
1.135 paf 691: struct Cache_get_result {
692: const String* body;
693: bool expired;
1.137 paf 694: };
695: #endif
1.229 moko 696:
1.137 paf 697: static Cache_get_result cache_get(Request_charsets& charsets, const String& file_spec, time_t now) {
1.140 paf 698: Cache_get_result result={0, false};
1.135 paf 699:
1.129 paf 700: File_read_result file=file_read(charsets, file_spec,
1.63 paf 701: false/*as_text*/,
1.129 paf 702: 0, //no params
703: false/*fail_on_read_problem*/);
704: if(file.success && file.length/* ignore reads which are empty due to
1.72 paf 705: non-unary open+lockEX conflict with lockSH */) {
1.129 paf 706:
1.72 paf 707: Data_string_serialized_prolog& prolog=
1.129 paf 708: *reinterpret_cast<Data_string_serialized_prolog *>(file.str);
1.63 paf 709:
1.135 paf 710: String* body=new String;
1.72 paf 711: if(
1.129 paf 712: file.length>=sizeof(Data_string_serialized_prolog)
1.135 paf 713: && prolog.version==DATA_STRING_SERIALIZED_VERSION) {
714: if(body->deserialize(sizeof(Data_string_serialized_prolog), file.str, file.length)) {
715: result.body=body;
716: result.expired=prolog.expires <= now;
717: }
718: }
1.72 paf 719: }
1.63 paf 720:
1.135 paf 721: return result;
1.63 paf 722: }
1.129 paf 723: static time_t as_expires(Request& r, MethodParams& params,
1.79 paf 724: int index, time_t now) {
725: time_t result;
1.197 misha 726: if(Value* vdate=params[index].as(VDATE_TYPE))
1.220 moko 727: result=(time_t)(static_cast<VDate*>(vdate)->get_time());
1.79 paf 728: else
1.129 paf 729: result=now+(time_t)params.as_double(index, "lifespan must be date or number", r);
1.79 paf 730:
731: return result;
732: }
1.229 moko 733:
1.129 paf 734: static const String& as_file_spec(Request& r, MethodParams& params, int index) {
735: return r.absolute(params.as_string(index, "filespec must be string"));
1.79 paf 736: }
1.229 moko 737:
1.129 paf 738: static void _cache(Request& r, MethodParams& params) {
1.173 misha 739: if(params.count()==0) {
740: // ^cache[] -- return current expiration time
1.158 paf 741: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
742: if(!scope)
1.221 moko 743: throw Exception(PARSER_RUNTIME, 0, "expire-time get without cache");
744: r.write_no_lang(*new VDate((pa_time_t)scope->expires));
1.158 paf 745: return;
746: }
747:
1.79 paf 748: time_t now=time(0);
749:
1.129 paf 750: if(params.count()==1) {
1.173 misha 751: // ^cache[filename] ^cache(seconds) ^cache[expires date]
1.129 paf 752: if(params[0].is_string()) { // filename?
1.79 paf 753: cache_delete(as_file_spec(r, params, 0));
754: return;
755: }
756:
757: // secods|expires date
1.135 paf 758: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
759: if(!scope)
1.166 misha 760: throw Exception(PARSER_RUNTIME,
1.129 paf 761: 0,
1.79 paf 762: "expire-time reducing instruction without cache");
763:
1.129 paf 764: time_t expires=as_expires(r, params, 0, now);
1.135 paf 765: if(expires < scope->expires)
766: scope->expires=expires;
1.79 paf 767:
768: return;
1.149 paf 769: } else if(params.count()<3)
1.166 misha 770: throw Exception(PARSER_RUNTIME,
1.149 paf 771: 0,
772: "invalid number of parameters");
1.63 paf 773:
774: // file_spec, expires, body code
1.172 misha 775: const String& file_spec=as_file_spec(r, params, 0);
1.65 paf 776:
1.141 paf 777: Cache_scope scope={as_expires(r, params, 1, now), 0};
1.135 paf 778:
1.215 moko 779: Temp_hash_value<HashString<void*>, void*> cache_scope_setter(&r.classes_conf, cache_data_name, &scope);
1.136 paf 780: Value& body_code=params.as_junction(2, "body_code must be code");
781: Value* catch_code=0;
782: if(params.count()>3)
783: catch_code=¶ms.as_junction(3, "catch_code must be code");
1.63 paf 784:
1.168 misha 785: if(scope.expires>now) {
786: Cache_get_result cached=cache_get(r.charsets, file_spec, now);
1.69 paf 787:
1.168 misha 788: if(cached.body) { // have cached copy
1.174 misha 789: if(cached.expired) {
790: scope.body_from_disk=cached.body; // storing for user to retrive it with ^cache[]
791: } else {
792: // and it's not expired yet write it out
1.168 misha 793: r.write_assign_lang(*cached.body);
794: // happy with it
795: return;
796: }
797: }
798:
799: // no cached info or it's already expired
1.173 misha 800:
801: // trying to process it under lock and store result in file
1.174 misha 802: const String* processed_body=locked_process_and_cache_put(r, body_code, catch_code, scope, file_spec);
1.173 misha 803: if(processed_body){
1.174 misha 804: // write it out
805: r.write_assign_lang(*processed_body);
806: // happy with it
807: return;
1.173 misha 808: } else {
809: // we fail while get exclusive lock. nvm, we just execute body_code a bit later
1.174 misha 810: }
1.69 paf 811: } else {
1.79 paf 812: // instructed not to cache; forget cached copy
1.68 paf 813: cache_delete(file_spec);
1.69 paf 814: }
1.168 misha 815:
1.222 moko 816: // process without caching
817: if(catch_code){
818: Try_catch_result result=try_catch(r, process_try_body_code, &body_code, catch_code);
819: r.write_assign_lang(result.processed_code);
820: } else {
821: const String& processed_body=r.process_to_string(body_code);
822: r.write_assign_lang(processed_body);
823: }
1.63 paf 824: }
825:
1.129 paf 826: static void _try_operator(Request& r, MethodParams& params) {
827: Value& body_code=params.as_junction(0, "body_code must be code");
828: Value& catch_code=params.as_junction(1, "catch_code must be code");
1.179 misha 829: Value* finally_code=(params.count()==3) ? ¶ms.as_junction(2, "finally_code must be code") : 0;
830:
831: Try_catch_result result;
832: StringOrValue finally_result;
1.229 moko 833:
1.179 misha 834: try{
1.229 moko 835: // process try and catch code
1.222 moko 836: result=try_catch(r, process_try_body_code, &body_code, &catch_code);
1.179 misha 837: } catch(...){
1.229 moko 838: // process finally code but ignore the result
839: if(finally_code){
840: Temp_skip temp(r);
1.179 misha 841: finally_result=r.process(*finally_code);
1.229 moko 842: }
1.179 misha 843: rethrow;
844: }
1.74 paf 845:
1.229 moko 846: // process finally code
847: if(finally_code){
848: Temp_skip temp(r);
1.179 misha 849: finally_result=r.process(*finally_code);
1.229 moko 850: }
851:
852: // no exception in try, catch or finally, writing the result
1.123 paf 853:
1.136 paf 854: // write out processed body_code or catch_code
855: r.write_pass_lang(result.processed_code);
1.179 misha 856:
857: // write out processed finally code
858: if(finally_code)
859: r.write_pass_lang(finally_result);
1.74 paf 860: }
861:
1.138 paf 862: static void _throw_operator(Request&, MethodParams& params) {
1.178 misha 863: if(params.count()==1 && !params[0].is_string()) {
1.129 paf 864: if(HashStringValue *hash=params[0].get_hash()) {
865: const char* type=0;
866: if(Value* value=hash->get(exception_type_part_name))
1.78 paf 867: type=value->as_string().cstr();
1.129 paf 868: const String* source=0;
869: if(Value* value=hash->get(exception_source_part_name))
1.74 paf 870: source=&value->as_string();
1.138 paf 871: const char* comment=0;
1.129 paf 872: if(Value* value=hash->get(exception_comment_part_name))
1.74 paf 873: comment=value->as_string().cstr();
874:
1.78 paf 875: throw Exception(type,
1.129 paf 876: source?source:0,
877: "%s", comment?comment:"");
1.74 paf 878: } else
1.166 misha 879: throw Exception(PARSER_RUNTIME,
1.129 paf 880: 0,
1.178 misha 881: "one-param version has hash or string param");
1.74 paf 882: } else {
1.129 paf 883: const char* type=params.as_string(0, "type must be string").cstr();
1.178 misha 884: const String* source=params.count()>1? ¶ms.as_string(1, "source must be string"):0;
885: const char* comment=params.count()>2? params.as_string(2, "comment must be string").cstr():0;
886: throw Exception(type, source, "%s", comment?comment:"");
1.74 paf 887: }
1.132 paf 888: }
1.129 paf 889:
1.150 paf 890: static void _sleep_operator(Request& r, MethodParams& params) {
891: double seconds=params.as_double(0, "seconds must be double", r);
1.206 moko 892: if(seconds>0)
893: pa_sleep((int)trunc(seconds), (int)trunc((seconds-trunc(seconds))*1000000));
1.150 paf 894: }
895:
1.129 paf 896: #if defined(WIN32) && defined(_DEBUG)
897: # define PA_BPT
1.138 paf 898: static void _bpt(Request&, MethodParams&) {
1.129 paf 899: _asm int 3;
900: }
901: #endif
902:
1.10 paf 903: // constructor
904:
1.226 moko 905: VClassMAIN::VClassMAIN(): VClass(MAIN_CLASS_NAME) {
1.129 paf 906:
907: #ifdef PA_BPT
908: // ^bpt[]
909: add_native_method("bpt", Method::CT_ANY, _bpt, 0, 0);
910: #endif
1.121 paf 911:
1.1 paf 912: // ^if(condition){code-when-true}
913: // ^if(condition){code-when-true}{code-when-false}
1.200 moko 914: // ^if(condition){code-when-true} (another condition){code-when-true} ... {code-when-false}
915: add_native_method("if", Method::CT_ANY, _if, 2, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 916:
1.194 misha 917: // ^untaint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
918: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 919:
1.194 misha 920: // ^taint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
921: add_native_method("taint", Method::CT_ANY, _taint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 922:
1.205 moko 923: // ^apply-taint[untaint lang][string]
924: add_native_method("apply-taint", Method::CT_ANY, _apply_taint, 1, 2, Method::CO_WITHOUT_FRAME);
925:
1.216 moko 926: // ^process{code}
927: // ^process[context]{code}[options hash]
1.146 paf 928: add_native_method("process", Method::CT_ANY, _process, 1, 3);
1.1 paf 929:
930: // ^rem{code}
1.185 misha 931: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 932:
933: // ^while(condition){code}
1.185 misha 934: add_native_method("while", Method::CT_ANY, _while, 2, 3, Method::CO_WITHOUT_FRAME);
1.1 paf 935:
1.216 moko 936: // ^use[file[;options hash]]
937: add_native_method("use", Method::CT_ANY, _use, 1, 2);
1.1 paf 938:
1.164 paf 939: // ^break[]
1.227 moko 940: // ^break(condition)
941: add_native_method("break", Method::CT_ANY, _break, 0, 1, Method::CO_WITHOUT_FRAME);
1.185 misha 942:
1.164 paf 943: // ^continue[]
1.227 moko 944: // ^continue(condition)
945: add_native_method("continue", Method::CT_ANY, _continue, 0, 1, Method::CO_WITHOUT_FRAME);
1.185 misha 946:
1.54 paf 947: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.185 misha 948: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1, Method::CO_WITHOUT_WCONTEXT);
1.1 paf 949:
950: // ^eval(expr)
951: // ^eval(expr)[format]
1.185 misha 952: add_native_method("eval", Method::CT_ANY, _eval, 1, 2, Method::CO_WITHOUT_FRAME);
1.52 parser 953:
1.1 paf 954: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 955: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
956:
1.63 paf 957:
1.136 paf 958: // ^cache[file_spec](time){code}[{catch code}] time=0 no cache
1.65 paf 959: // ^cache[file_spec] delete cache
1.161 paf 960: // ^cache[] get current expiration time
961: add_native_method("cache", Method::CT_ANY, _cache, 0, 4);
1.63 paf 962:
1.28 parser 963: // switch
964:
965: // ^switch[value]{cases}
1.185 misha 966: add_native_method("switch", Method::CT_ANY, _switch, 2, 2, Method::CO_WITHOUT_FRAME);
1.28 parser 967:
968: // ^case[value]{code}
1.185 misha 969: add_native_method("case", Method::CT_ANY, _case, 2, 10000, Method::CO_WITHOUT_FRAME);
1.74 paf 970:
971: // try-catch
972:
973: // ^try{code}{catch code}
1.185 misha 974: add_native_method("try", Method::CT_ANY, _try_operator, 2, 3, Method::CO_WITHOUT_FRAME);
1.74 paf 975: // ^throw[$exception hash]
976: // ^throw[type;source;comment]
977: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
978:
1.150 paf 979: add_native_method("sleep", Method::CT_ANY, _sleep_operator, 1, 1);
1.10 paf 980: }
1.11 paf 981:
982: // constructor & configurator
1.1 paf 983:
1.129 paf 984: VStateless_class& VClassMAIN_create() {
985: return *new VClassMAIN;
1.1 paf 986: }
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