Annotation of parser3/src/classes/op.C, revision 1.241
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:
1.241 ! moko 21: volatile const char * IDENT_OP_C="$Id: op.C,v 1.240 2016/10/11 21:30:16 moko Exp $";
1.18 parser 22:
1.10 paf 23: // defines
24:
1.82 paf 25: #define CASE_DEFAULT_VALUE "DEFAULT"
1.11 paf 26:
1.10 paf 27: // class
28:
1.113 paf 29: class VClassMAIN: public VClass {
1.10 paf 30: public:
1.129 paf 31: VClassMAIN();
1.10 paf 32: };
33:
1.129 paf 34: // defines for statics
35:
36: #define SWITCH_DATA_NAME "SWITCH-DATA"
37: #define CACHE_DATA_NAME "CACHE-DATA"
1.164 paf 38:
1.129 paf 39: #define EXCEPTION_VAR_NAME "exception"
40:
41: // statics
42:
43: //^switch ^case
44: static const String switch_data_name(SWITCH_DATA_NAME);
45: //^cache
46: static const String cache_data_name(CACHE_DATA_NAME);
47:
48: static const String exception_var_name(EXCEPTION_VAR_NAME);
49:
1.164 paf 50:
1.136 paf 51: // local defines
52:
53: #define CACHE_EXCEPTION_HANDLED_CACHE_NAME "cache"
54:
1.129 paf 55: // helpers
56:
1.187 misha 57: class Untaint_lang_name2enum: public HashString<String::Language> {
1.129 paf 58: public:
59: Untaint_lang_name2enum() {
1.223 moko 60: #define ULN(name, LANG) put(name, (value_type)(String::L_##LANG));
1.198 misha 61: ULN("clean", CLEAN);
1.129 paf 62: ULN("as-is", AS_IS);
63: ULN("optimized-as-is", AS_IS|String::L_OPTIMIZE_BIT);
64: ULN("file-spec", FILE_SPEC);
65: ULN("http-header", HTTP_HEADER);
66: ULN("mail-header", MAIL_HEADER);
67: ULN("uri", URI);
68: ULN("sql", SQL);
69: ULN("js", JS);
70: ULN("xml", XML);
71: ULN("optimized-xml", XML|String::L_OPTIMIZE_BIT);
72: ULN("html", HTML);
73: ULN("optimized-html", HTML|String::L_OPTIMIZE_BIT);
1.159 paf 74: ULN("regex", REGEX);
1.193 misha 75: ULN("parser-code", PARSER_CODE);
1.204 misha 76: ULN("json", JSON);
1.129 paf 77: #undef ULN
78: }
79: } untaint_lang_name2enum;
80:
1.10 paf 81: // methods
82:
1.129 paf 83: static void _if(Request& r, MethodParams& params) {
1.200 moko 84: size_t max_param=params.count()-1;
85: size_t i=0;
86: do {
87: bool condition=params.as_bool(i, "condition must be expression", r);
88: if(condition) {
1.238 moko 89: r.process_write(params[i+1]);
1.200 moko 90: return;
91: }
92: i+=2;
93: } while (i < max_param);
94:
95: if(i == max_param)
1.238 moko 96: r.process_write(params[i]);
1.1 paf 97: }
98:
1.210 moko 99: String::Language get_untaint_lang(const String& lang_name){
1.175 misha 100: String::Language lang=untaint_lang_name2enum.get(lang_name);
101: if(!lang)
1.210 moko 102: throw Exception(PARSER_RUNTIME, &lang_name, "invalid taint language");
1.175 misha 103: return lang;
104: }
105:
1.129 paf 106: static void _untaint(Request& r, MethodParams& params) {
107: String::Language lang;
108: if(params.count()==1)
1.241 ! moko 109: lang=String::L_AS_IS; // mark as simply 'as-is'. useful in html from sql
1.175 misha 110: else
1.210 moko 111: lang=get_untaint_lang(params.as_string(0, "lang must be string"));
1.1 paf 112:
1.241 ! moko 113: Value& vbody=params.as_junction(params.count()-1, "body must be code");
! 114: Value& result=r.process(vbody);
! 115:
! 116: if(const String* string=result.get_string()){
! 117: String &untainted=*new String();
! 118: string->append_to(untainted, lang); // mark all tainted to specified language
! 119: r.write_pass_lang(untainted);
! 120: } else
! 121: r.write_pass_lang(result); // this is not normal, just backward compatibility
1.1 paf 122: }
123:
1.129 paf 124: static void _taint(Request& r, MethodParams& params) {
125: String::Language lang;
126: if(params.count()==1)
1.175 misha 127: lang=String::L_TAINTED; // mark as simply 'tainted'. useful in table:create
128: else
1.210 moko 129: lang=get_untaint_lang(params.as_string(0, "lang must be string"));
1.1 paf 130:
131: {
1.129 paf 132: Value& vbody=params.as_no_junction(params.count()-1, "body must not be code");
1.1 paf 133:
1.191 misha 134: String result(vbody.as_string(), lang); // force result language to specified
1.241 ! moko 135: r.write_pass_lang(result);
1.1 paf 136: }
137: }
138:
1.205 moko 139: static void _apply_taint(Request& r, MethodParams& params) {
1.210 moko 140: String::Language lang=params.count()==1 ? String::L_AS_IS : get_untaint_lang(params.as_string(0, "lang must be string"));
1.205 moko 141: const String &sbody=params.as_string(params.count()-1, "body must be string");
1.213 moko 142: String::Body result_body=sbody.cstr_to_string_body_untaint(lang, r.connection(false), &r.charsets);
1.205 moko 143: r.write_pass_lang(*new String(result_body, String::L_AS_IS));
144: }
145:
1.129 paf 146: static void _process(Request& r, MethodParams& params) {
147: Method* main_method;
148:
149: size_t index=0;
150: Value* target_self;
151: Value& maybe_target_self=params[index];
152: if(maybe_target_self.get_string() || maybe_target_self.get_junction())
153: target_self=&r.get_method_frame()->caller()->self();
154: else {
1.233 moko 155: target_self=&maybe_target_self;
156: if(params.count()==1)
157: throw Exception(PARSER_RUNTIME, 0, "no body specified");
158: index++;
1.129 paf 159: }
160:
1.1 paf 161: {
1.197 misha 162: VStateless_class *target_class=target_self->get_class();
1.116 paf 163: if(!target_class)
1.232 moko 164: throw Exception(PARSER_RUNTIME, 0, "no target class");
1.114 paf 165:
1.1 paf 166: // temporary zero @main so to maybe-replace it in processed code
1.129 paf 167: Temp_method temp_method_main(*target_class, main_method_name, 0);
168:
169: const String* main_alias=0;
1.146 paf 170: const String* file_alias=0;
171: int line_no_alias_offset=0;
1.216 moko 172: bool allow_class_replace=false;
1.211 misha 173:
174: size_t options_index=index+1;
175: if(options_index<params.count())
176: if(HashStringValue* options=params.as_hash(options_index)) {
1.216 moko 177:
1.211 misha 178: int valid_options=0;
1.216 moko 179: for(HashStringValue::Iterator i(*options); i; i.next() ){
180:
181: String::Body key=i.key();
182: Value* value=i.value();
183:
184: if(key == "main") {
185: valid_options++;
186: main_alias=&value->as_string();
187: } else if(key == "file") {
188: valid_options++;
189: file_alias=&value->as_string();
190: } else if(key == "lineno") {
191: valid_options++;
192: line_no_alias_offset=value->as_int();
193: } else if(key == "replace") {
194: valid_options++;
1.236 moko 195: allow_class_replace=r.process(*value).as_bool();
1.216 moko 196: }
1.211 misha 197: }
1.216 moko 198:
1.211 misha 199: if(valid_options!=options->count())
200: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
1.146 paf 201: }
1.129 paf 202:
1.232 moko 203: uint processe_file_no=file_alias ? r.register_file(r.absolute(*file_alias)) : pseudo_file_no__process;
1.146 paf 204: // process...{string}
205: Value& vjunction=params.as_junction(index, "body must be code");
1.241 ! moko 206: // temporary remove language change
! 207: Temp_lang temp_lang(r, String::L_PARSER_CODE);
1.146 paf 208: // evaluate source to process
209: const String& source=r.process_to_string(vjunction);
1.216 moko 210:
211: Temp_class_replace class_replace(r, allow_class_replace);
212:
1.241 ! moko 213: r.use_buf(*target_class, source.untaint_cstr(String::L_PARSER_CODE, r.connection(false)), main_alias, processe_file_no, line_no_alias_offset);
1.1 paf 214:
1.73 paf 215: // main_method
1.129 paf 216: main_method=target_class->get_method(main_method_name);
1.73 paf 217: }
218: // after restoring current-request-lang
219: // maybe-execute @main[]
220: if(main_method) {
1.202 moko 221: VMethodFrame frame(*main_method, r.get_method_frame()->caller(), *target_self);
222: frame.empty_params();
1.240 moko 223: r.call(frame);
1.203 moko 224: r.write_pass_lang(frame.result());
1.1 paf 225: }
226: }
227:
1.138 paf 228: static void _rem(Request&, MethodParams& params) {
1.129 paf 229: params.as_junction(0, "body must be code");
1.1 paf 230: }
231:
1.129 paf 232: static void _while(Request& r, MethodParams& params) {
1.196 misha 233: InCycle temp(r);
1.164 paf 234:
1.170 misha 235: Value& vcondition=params.as_expression(0, "condition must be number, bool or expression");
236:
1.162 paf 237: Value& body_code=params.as_junction(1, "body must be code");
238: Value* delim_maybe_code=params.count()>2?¶ms[2]:0;
1.1 paf 239:
240: // while...
241: int endless_loop_count=0;
1.186 misha 242: if(delim_maybe_code){ // delimiter set
1.185 misha 243: bool need_delim=false;
244: while(true) {
1.235 moko 245: if(++endless_loop_count>=pa_loop_limit) // endless loop?
246: throw Exception(PARSER_RUNTIME, 0, "endless loop detected");
1.185 misha 247:
1.237 moko 248: if(!r.process(vcondition).as_bool())
1.185 misha 249: break;
1.1 paf 250:
1.234 moko 251: Value& sv_processed=r.process(body_code);
1.185 misha 252: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 misha 253:
1.185 misha 254: const String* s_processed=sv_processed.get_string();
1.186 misha 255: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 256: if(need_delim) // need delim & iteration produced string?
257: r.write_pass_lang(r.process(*delim_maybe_code));
258: else
259: need_delim=true;
260: }
261: r.write_pass_lang(sv_processed);
1.1 paf 262:
1.185 misha 263: if(lskip==Request::SKIP_BREAK)
264: break;
1.162 paf 265: }
1.185 misha 266: } else {
267: while(true) {
1.235 moko 268: if(++endless_loop_count>=pa_loop_limit) // endless loop?
269: throw Exception(PARSER_RUNTIME, 0, "endless loop detected");
1.185 misha 270:
1.237 moko 271: if(!r.process(vcondition).as_bool())
1.185 misha 272: break;
1.164 paf 273:
1.185 misha 274: r.process_write(body_code);
275: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
276:
277: if(lskip==Request::SKIP_BREAK)
278: break;
279: }
1.1 paf 280: }
281: }
282:
1.129 paf 283: static void _use(Request& r, MethodParams& params) {
1.171 misha 284: Value& vfile=params.as_no_junction(0, FILE_NAME_MUST_NOT_BE_CODE);
1.199 misha 285:
1.216 moko 286: bool allow_class_replace=false;
287:
288: if(params.count()==2)
289: if(HashStringValue* options=params.as_hash(1)) {
290: int valid_options=0;
291: for(HashStringValue::Iterator i(*options); i; i.next() ){
292:
293: String::Body key=i.key();
294: Value* value=i.value();
295:
296: if(key == "replace") {
297: valid_options++;
1.236 moko 298: allow_class_replace=r.process(*value).as_bool();
1.216 moko 299: }
300:
301: if(valid_options!=options->count())
302: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
303: }
304: }
305:
306: Temp_class_replace class_replace(r, allow_class_replace);
307:
1.199 misha 308: // _use could be called from the parser3 method only, so caller is always defined
1.202 moko 309: r.use_file(r.main_class, vfile.as_string(), r.get_method_filename(&r.get_method_frame()->caller()->method));
1.1 paf 310: }
311:
1.164 paf 312: static void set_skip(Request& r, Request::Skip askip) {
1.196 misha 313: if(!r.get_in_cycle())
1.227 moko 314: throw Exception(askip==Request::SKIP_BREAK ? "parser.break" : "parser.continue", 0, "without cycle");
1.164 paf 315: r.set_skip(askip);
316: }
317:
1.227 moko 318: static void _break(Request& r, MethodParams& params) {
319: if(!params.count() || params.as_bool(0, "condition must be expression", r)) set_skip(r, Request::SKIP_BREAK);
1.164 paf 320: }
321:
1.227 moko 322: static void _continue(Request& r, MethodParams& params) {
323: if(!params.count() || params.as_bool(0, "condition must be expression", r)) set_skip(r, Request::SKIP_CONTINUE);
1.164 paf 324: }
325:
1.129 paf 326: static void _for(Request& r, MethodParams& params) {
1.196 misha 327: InCycle temp(r);
1.164 paf 328:
1.129 paf 329: const String& var_name=params.as_string(0, "var name must be string");
330: int from=params.as_int(1, "from must be int", r);
331: int to=params.as_int(2, "to must be int", r);
1.186 misha 332: Value& body_code=params.as_junction(3, "body must be code");
1.129 paf 333: Value* delim_maybe_code=params.count()>4?¶ms[4]:0;
1.1 paf 334:
1.235 moko 335: if(to-from>=pa_loop_limit) // too long loop?
336: throw Exception(PARSER_RUNTIME, 0, "endless loop detected");
1.57 paf 337:
1.129 paf 338: VInt* vint=new VInt(0);
1.154 paf 339:
340: VMethodFrame& caller=*r.get_method_frame()->caller();
1.218 moko 341: r.put_element(caller, var_name, vint);
1.186 misha 342: if(delim_maybe_code){ // delimiter set
1.185 misha 343: bool need_delim=false;
344:
345: for(int i=from; i<=to; i++) {
346: vint->set_int(i);
347:
1.234 moko 348: Value& sv_processed=r.process(body_code);
1.185 misha 349: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.186 misha 350:
1.185 misha 351: const String* s_processed=sv_processed.get_string();
1.186 misha 352: if(s_processed && !s_processed->is_empty()) { // we have body
1.185 misha 353: if(need_delim) // need delim & iteration produced string?
354: r.write_pass_lang(r.process(*delim_maybe_code));
355: else
356: need_delim=true;
357: }
358: r.write_pass_lang(sv_processed);
1.1 paf 359:
1.185 misha 360: if(lskip==Request::SKIP_BREAK)
361: break;
1.1 paf 362: }
1.185 misha 363: } else {
364: for(int i=from; i<=to; i++) {
365: vint->set_int(i);
366:
367: r.process_write(body_code);
368: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1.164 paf 369:
1.185 misha 370: if(lskip==Request::SKIP_BREAK)
371: break;
372: }
1.1 paf 373: }
374: }
375:
1.129 paf 376: static void _eval(Request& r, MethodParams& params) {
377: Value& expr=params.as_junction(0, "need expression");
1.1 paf 378: // evaluate expresion
1.237 moko 379: Value& value_result=r.process(expr).as_expr_result();
1.129 paf 380: if(params.count()>1) {
1.177 misha 381: const String& fmt=params.as_string(1, "fmt must be string").trim();
382: if(fmt.is_empty()){
383: r.write_no_lang(value_result);
384: } else {
385: r.write_no_lang(String(format(value_result.as_double(), fmt.cstrm())));
386: }
1.91 paf 387: } else
1.129 paf 388: r.write_no_lang(value_result);
1.1 paf 389: }
390:
1.129 paf 391: static void _connect(Request& r, MethodParams& params) {
392: Value& url=params.as_no_junction(0, "url must not be code");
393: Value& body_code=params.as_junction(1, "body must be code");
1.1 paf 394:
1.129 paf 395: Table* protocol2driver_and_client=0;
1.197 misha 396: if(Value* sql=r.main_class.get_element(String(MAIN_SQL_NAME))) {
397: if(Value* element=sql->get_element(String(MAIN_SQL_DRIVERS_NAME))) {
1.113 paf 398: protocol2driver_and_client=element->get_table();
399: }
400: }
1.11 paf 401:
1.1 paf 402: // connect
1.142 paf 403: SQL_Connection* connection=SQL_driver_manager->get_connection(url.as_string(),
1.144 paf 404: protocol2driver_and_client,
1.180 misha 405: r.charsets.source().NAME().cstr(),
406: r.request_info.document_root);
1.1 paf 407:
1.214 moko 408: Temp_connection temp_connection(r, connection);
1.63 paf 409:
1.1 paf 410: // execute body
1.53 parser 411: try {
1.189 misha 412: r.process_write(body_code);
1.129 paf 413: connection->commit();
414: connection->close();
1.75 paf 415: } catch(...) { // process problem
1.129 paf 416: connection->rollback();
417: connection->close();
418: rethrow;
1.1 paf 419: }
420: }
421:
1.41 parser 422: #ifndef DOXYGEN
1.129 paf 423: class Switch_data: public PA_Object {
424: public:
425: Request& r;
1.181 misha 426: const String* searching_string;
427: double searching_double;
1.207 misha 428: bool searching_bool;
1.129 paf 429: Value* found;
430: Value* _default;
431: public:
432: Switch_data(Request& ar, Value& asearching):
1.181 misha 433: r(ar)
434: {
435: if(asearching.is_string() || asearching.is_void()){
436: searching_string=&asearching.as_string();
437: searching_double=0;
1.207 misha 438: searching_bool=false;
1.181 misha 439: } else {
440: searching_string=0;
441: searching_double=asearching.as_double();
1.207 misha 442: searching_bool=asearching.is_bool();
1.181 misha 443: }
444: }
1.28 parser 445: };
1.41 parser 446: #endif
1.129 paf 447: static void _switch(Request& r, MethodParams& params) {
1.236 moko 448: Switch_data* data=new Switch_data(r, r.process(params[0]));
1.215 moko 449: Temp_hash_value<HashString<void*>, void*> switch_data_setter(&r.classes_conf, switch_data_name, data);
1.28 parser 450:
1.129 paf 451: Value& cases_code=params.as_junction(1, "switch cases must be code");
1.82 paf 452: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
453: // because of stacked WWrapper used there as wcontext
1.237 moko 454: r.process(cases_code);
1.147 paf 455: if(Value* selected_code=data->found? data->found: data->_default)
1.107 paf 456: r.write_pass_lang(r.process(*selected_code));
1.28 parser 457: }
458:
1.129 paf 459: static void _case(Request& r, MethodParams& params) {
460: Switch_data* data=static_cast<Switch_data*>(r.classes_conf.get(switch_data_name));
1.38 parser 461: if(!data)
1.166 misha 462: throw Exception(PARSER_RUNTIME,
1.129 paf 463: 0,
1.38 parser 464: "without switch");
1.28 parser 465:
1.181 misha 466: if(data->found) // matches already was found
467: return;
468:
1.129 paf 469: int count=params.count();
1.184 misha 470: Value* code=¶ms.as_expression(--count, "case result must be code");
471:
472: #ifdef USE_DESTRUCTORS
473: Junction *j=code->get_junction();
474: if (j){
475: code=new VJunction(j->self,j->method,j->method_frame,j->rcontext,j->wcontext,j->code);
476: if (j->wcontext) j->wcontext->attach_junction((VJunction *)code);
477: }
478: #endif
1.83 paf 479:
1.181 misha 480: for(int i=0; i<count; i++){
1.236 moko 481: Value& value=r.process(params[i]);
1.28 parser 482:
1.181 misha 483: if(value.is_string() && value.as_string() == CASE_DEFAULT_VALUE){
1.184 misha 484: data->_default=code;
1.181 misha 485: continue;
1.28 parser 486: }
487:
488: bool matches;
1.181 misha 489: if(data->searching_string)
490: matches=(*data->searching_string) == value.as_string();
1.207 misha 491: else if(data->searching_bool || value.is_bool())
492: matches=(data->searching_double != 0) == value.as_bool();
1.28 parser 493: else
1.181 misha 494: matches=data->searching_double == value.as_double();
1.82 paf 495:
1.181 misha 496: if(matches){
1.184 misha 497: data->found=code;
1.28 parser 498: break;
499: }
500: }
501: }
1.136 paf 502: #ifndef DOXYGEN
503: struct Try_catch_result {
1.234 moko 504: ValueRef processed_code;
1.136 paf 505: const String* exception_should_be_handled;
506:
507: Try_catch_result(): exception_should_be_handled(0) {}
508: };
1.229 moko 509:
510: /// Auto-object used for temporary changing Request::skip.
511: class Temp_skip {
512: Request& frequest;
513: Request::Skip saved_skip;
514: public:
515: Temp_skip(Request& arequest) : frequest(arequest), saved_skip(arequest.get_skip()) {
516: arequest.set_skip(Request::SKIP_NOTHING);
517: }
518: ~Temp_skip() {
519: if(frequest.get_skip() == Request::SKIP_NOTHING)
520: frequest.set_skip(saved_skip);
521: }
522: };
1.136 paf 523: #endif
524:
525: /// used by ^try and ^cache, @returns $exception.handled[string] if any
526: template<class I>
1.234 moko 527: static Try_catch_result try_catch(Request& r, Value& body_code(Request&, I), I info, Value* catch_code, bool could_be_handled_by_caller=false) {
1.136 paf 528: Try_catch_result result;
1.179 misha 529:
1.228 moko 530: // minor bug: context not restored if only finally code is present, see #1062
1.136 paf 531: if(!catch_code) {
532: result.processed_code=body_code(r, info);
533: return result;
534: }
535:
536: // taking snapshot of try-context
537: Request_context_saver try_context(r);
538: try {
539: result.processed_code=body_code(r, info);
540: } catch(const Exception& e) {
1.230 moko 541: Request_context_saver throw_context(r); // remembering exception stack trace
542:
1.136 paf 543: Request::Exception_details details=r.get_details(e);
1.230 moko 544:
1.228 moko 545: try_context.restore(); // restoring try-context for code after try and catch-code
1.136 paf 546:
1.228 moko 547: {
548: Temp_value_element temp(r, *catch_code->get_junction()->method_frame, exception_var_name, &details.vhash);
1.229 moko 549: Temp_skip temp_skip(r);
1.228 moko 550: result.processed_code=r.process(*catch_code);
551: }
1.136 paf 552:
1.228 moko 553: // retriving $exception.handled
1.136 paf 554: Value* vhandled=details.vhash.hash().get(exception_handled_part_name);
555:
556: bool bhandled=false;
557: if(vhandled) {
558: if(vhandled->is_string()) { // not simple $exception.handled(1/0)?
1.228 moko 559: if(bhandled=could_be_handled_by_caller) { // and we can possibly handle it
1.160 paf 560: result.exception_should_be_handled=vhandled->get_string(); // considering 'recovered' and let the caller recover
561: }
562: } else
1.179 misha 563: bhandled=vhandled->as_bool();
1.136 paf 564: }
565:
1.230 moko 566: if(!bhandled){
567: throw_context.restore(); // restoring exception stack trace creared by try_context.restore()
1.136 paf 568: rethrow;
1.230 moko 569: }
1.136 paf 570: }
1.179 misha 571:
1.136 paf 572: return result;
573: }
1.28 parser 574:
1.234 moko 575: static Value& process_try_body_code(Request& r, Value* body_code) {
1.222 moko 576: return r.process(*body_code);
577: }
578:
1.63 paf 579: // cache--
580:
581: // consts
582:
1.152 paf 583: const int DATA_STRING_SERIALIZED_VERSION=0x0006;
1.63 paf 584:
585: // helper types
586:
587: #ifndef DOXYGEN
588: struct Data_string_serialized_prolog {
589: int version;
1.79 paf 590: time_t expires;
1.63 paf 591: };
592: #endif
593:
1.68 paf 594: void cache_delete(const String& file_spec) {
1.167 misha 595: file_delete(file_spec, false/*fail_on_problem*/);
1.63 paf 596: }
1.69 paf 597:
598: #ifndef DOXYGEN
1.135 paf 599: struct Cache_scope {
1.129 paf 600: public:
1.79 paf 601: time_t expires;
1.135 paf 602: const String* body_from_disk;
1.79 paf 603: };
1.69 paf 604: struct Locked_process_and_cache_put_action_info {
605: Request *r;
1.136 paf 606: Cache_scope *scope;
1.167 misha 607: Value* body_code;
608: Value* catch_code;
1.136 paf 609: const String* processed_code;
1.69 paf 610: };
611: #endif
1.136 paf 612:
613:
614:
1.234 moko 615: static Value& process_cache_body_code(Request& r, Value* body_code) {
616: return r.process(*body_code);
1.136 paf 617: }
618:
1.129 paf 619: /* @todo maybe network order worth spending some effort?
620: don't bothering myself with network byte order,
621: am not planning to be able to move resulting file across platforms
622: */
1.69 paf 623: static void locked_process_and_cache_put_action(int f, void *context) {
624: Locked_process_and_cache_put_action_info& info=
625: *static_cast<Locked_process_and_cache_put_action_info *>(context);
1.129 paf 626:
1.160 paf 627: const String* body_from_disk=info.scope->body_from_disk;
1.69 paf 628: // body->process
1.136 paf 629: Try_catch_result result=try_catch(*info.r,
630: process_cache_body_code, info.body_code,
1.160 paf 631: info.catch_code, body_from_disk!=0 /*we have something old=we can handle=recover later*/);
1.136 paf 632:
633: if(result.exception_should_be_handled) {
634: if(*result.exception_should_be_handled==CACHE_EXCEPTION_HANDLED_CACHE_NAME) {
1.160 paf 635: assert(body_from_disk);
636: info.processed_code=body_from_disk;
1.136 paf 637: } else
1.166 misha 638: throw Exception(PARSER_RUNTIME,
1.136 paf 639: result.exception_should_be_handled,
1.219 moko 640: "$" EXCEPTION_VAR_NAME "." EXCEPTION_HANDLED_PART_NAME " value must be "
641: "either boolean or string '" CACHE_EXCEPTION_HANDLED_CACHE_NAME "'");
1.136 paf 642: } else
1.234 moko 643: info.processed_code=&((Value &)result.processed_code).as_string();
1.69 paf 644:
1.79 paf 645: // expiration time not spoiled by ^cache(0) or something?
1.136 paf 646: if(info.scope->expires > time(0)) {
1.79 paf 647: // string -serialize> buffer
1.136 paf 648: String::Cm serialized=info.processed_code->serialize(
1.129 paf 649: sizeof(Data_string_serialized_prolog));
1.79 paf 650: Data_string_serialized_prolog& prolog=
1.129 paf 651: *reinterpret_cast<Data_string_serialized_prolog *>(serialized.str);
1.79 paf 652: prolog.version=DATA_STRING_SERIALIZED_VERSION;
1.136 paf 653: prolog.expires=info.scope->expires;
1.79 paf 654:
655: // buffer -write> file
1.129 paf 656: write(f, serialized.str, serialized.length);
1.79 paf 657: } else // expired!
1.136 paf 658: info.scope->expires=0; // flag it so that could be easily checked by caller
1.69 paf 659: }
1.129 paf 660: const String* locked_process_and_cache_put(Request& r,
1.128 paf 661: Value& body_code,
1.136 paf 662: Value* catch_code,
663: Cache_scope& scope,
664: const String& file_spec)
665: {
1.140 paf 666: Locked_process_and_cache_put_action_info info={&r, &scope, &body_code, catch_code, 0};
1.69 paf 667:
1.129 paf 668: const String* result=file_write_action_under_lock(
1.69 paf 669: file_spec,
1.168 misha 670: "cache_put",
671: locked_process_and_cache_put_action,
672: &info,
1.69 paf 673: false/*as_text*/,
674: false/*do_append*/,
1.173 misha 675: false/*block == don't wait till other thread release lock*/,
676: false/*dun throw exception if lock failed*/) ? info.processed_code: 0;
1.168 misha 677:
1.100 paf 678: time_t now=time(0);
1.136 paf 679: if(scope.expires<=now)
1.79 paf 680: cache_delete(file_spec);
681: return result;
1.63 paf 682: }
1.229 moko 683:
1.137 paf 684: #ifndef DOXYGEN
1.135 paf 685: struct Cache_get_result {
686: const String* body;
687: bool expired;
1.137 paf 688: };
689: #endif
1.229 moko 690:
1.137 paf 691: static Cache_get_result cache_get(Request_charsets& charsets, const String& file_spec, time_t now) {
1.140 paf 692: Cache_get_result result={0, false};
1.135 paf 693:
1.129 paf 694: File_read_result file=file_read(charsets, file_spec,
1.63 paf 695: false/*as_text*/,
1.129 paf 696: 0, //no params
697: false/*fail_on_read_problem*/);
698: if(file.success && file.length/* ignore reads which are empty due to
1.72 paf 699: non-unary open+lockEX conflict with lockSH */) {
1.129 paf 700:
1.72 paf 701: Data_string_serialized_prolog& prolog=
1.129 paf 702: *reinterpret_cast<Data_string_serialized_prolog *>(file.str);
1.63 paf 703:
1.135 paf 704: String* body=new String;
1.72 paf 705: if(
1.129 paf 706: file.length>=sizeof(Data_string_serialized_prolog)
1.135 paf 707: && prolog.version==DATA_STRING_SERIALIZED_VERSION) {
708: if(body->deserialize(sizeof(Data_string_serialized_prolog), file.str, file.length)) {
709: result.body=body;
710: result.expired=prolog.expires <= now;
711: }
712: }
1.72 paf 713: }
1.63 paf 714:
1.135 paf 715: return result;
1.63 paf 716: }
1.129 paf 717: static time_t as_expires(Request& r, MethodParams& params,
1.79 paf 718: int index, time_t now) {
719: time_t result;
1.197 misha 720: if(Value* vdate=params[index].as(VDATE_TYPE))
1.220 moko 721: result=(time_t)(static_cast<VDate*>(vdate)->get_time());
1.79 paf 722: else
1.129 paf 723: result=now+(time_t)params.as_double(index, "lifespan must be date or number", r);
1.79 paf 724:
725: return result;
726: }
1.229 moko 727:
1.129 paf 728: static const String& as_file_spec(Request& r, MethodParams& params, int index) {
729: return r.absolute(params.as_string(index, "filespec must be string"));
1.79 paf 730: }
1.229 moko 731:
1.129 paf 732: static void _cache(Request& r, MethodParams& params) {
1.173 misha 733: if(params.count()==0) {
734: // ^cache[] -- return current expiration time
1.158 paf 735: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
736: if(!scope)
1.221 moko 737: throw Exception(PARSER_RUNTIME, 0, "expire-time get without cache");
738: r.write_no_lang(*new VDate((pa_time_t)scope->expires));
1.158 paf 739: return;
740: }
741:
1.79 paf 742: time_t now=time(0);
743:
1.129 paf 744: if(params.count()==1) {
1.173 misha 745: // ^cache[filename] ^cache(seconds) ^cache[expires date]
1.129 paf 746: if(params[0].is_string()) { // filename?
1.79 paf 747: cache_delete(as_file_spec(r, params, 0));
748: return;
749: }
750:
751: // secods|expires date
1.135 paf 752: Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name));
753: if(!scope)
1.166 misha 754: throw Exception(PARSER_RUNTIME,
1.129 paf 755: 0,
1.79 paf 756: "expire-time reducing instruction without cache");
757:
1.129 paf 758: time_t expires=as_expires(r, params, 0, now);
1.135 paf 759: if(expires < scope->expires)
760: scope->expires=expires;
1.79 paf 761:
762: return;
1.149 paf 763: } else if(params.count()<3)
1.166 misha 764: throw Exception(PARSER_RUNTIME,
1.149 paf 765: 0,
766: "invalid number of parameters");
1.63 paf 767:
768: // file_spec, expires, body code
1.172 misha 769: const String& file_spec=as_file_spec(r, params, 0);
1.65 paf 770:
1.141 paf 771: Cache_scope scope={as_expires(r, params, 1, now), 0};
1.135 paf 772:
1.215 moko 773: Temp_hash_value<HashString<void*>, void*> cache_scope_setter(&r.classes_conf, cache_data_name, &scope);
1.136 paf 774: Value& body_code=params.as_junction(2, "body_code must be code");
775: Value* catch_code=0;
776: if(params.count()>3)
777: catch_code=¶ms.as_junction(3, "catch_code must be code");
1.63 paf 778:
1.168 misha 779: if(scope.expires>now) {
780: Cache_get_result cached=cache_get(r.charsets, file_spec, now);
1.69 paf 781:
1.168 misha 782: if(cached.body) { // have cached copy
1.174 misha 783: if(cached.expired) {
784: scope.body_from_disk=cached.body; // storing for user to retrive it with ^cache[]
785: } else {
786: // and it's not expired yet write it out
1.241 ! moko 787: r.write_pass_lang(*cached.body);
1.168 misha 788: // happy with it
789: return;
790: }
791: }
792:
793: // no cached info or it's already expired
1.173 misha 794:
795: // trying to process it under lock and store result in file
1.174 misha 796: const String* processed_body=locked_process_and_cache_put(r, body_code, catch_code, scope, file_spec);
1.173 misha 797: if(processed_body){
1.174 misha 798: // write it out
1.241 ! moko 799: r.write_pass_lang(*processed_body);
1.174 misha 800: // happy with it
801: return;
1.173 misha 802: } else {
803: // we fail while get exclusive lock. nvm, we just execute body_code a bit later
1.174 misha 804: }
1.69 paf 805: } else {
1.79 paf 806: // instructed not to cache; forget cached copy
1.68 paf 807: cache_delete(file_spec);
1.69 paf 808: }
1.168 misha 809:
1.222 moko 810: // process without caching
811: if(catch_code){
812: Try_catch_result result=try_catch(r, process_try_body_code, &body_code, catch_code);
1.241 ! moko 813: r.write_pass_lang(result.processed_code);
1.222 moko 814: } else {
1.241 ! moko 815: r.write_pass_lang(r.process_to_string(body_code));
1.222 moko 816: }
1.63 paf 817: }
818:
1.129 paf 819: static void _try_operator(Request& r, MethodParams& params) {
820: Value& body_code=params.as_junction(0, "body_code must be code");
821: Value& catch_code=params.as_junction(1, "catch_code must be code");
1.179 misha 822: Value* finally_code=(params.count()==3) ? ¶ms.as_junction(2, "finally_code must be code") : 0;
823:
824: Try_catch_result result;
1.229 moko 825:
1.179 misha 826: try{
1.229 moko 827: // process try and catch code
1.222 moko 828: result=try_catch(r, process_try_body_code, &body_code, &catch_code);
1.179 misha 829: } catch(...){
1.229 moko 830: // process finally code but ignore the result
831: if(finally_code){
832: Temp_skip temp(r);
1.234 moko 833: Value &finally_result=r.process(*finally_code);
1.229 moko 834: }
1.179 misha 835: rethrow;
836: }
1.74 paf 837:
1.229 moko 838: // process finally code
839: if(finally_code){
840: Temp_skip temp(r);
1.234 moko 841: Value& finally_result=r.process(*finally_code);
1.229 moko 842:
1.234 moko 843: // no exception in try/catch or finally, writing processed body_code or catch_code
844: r.write_pass_lang(result.processed_code);
1.123 paf 845:
1.234 moko 846: // write out processed finally code
847: r.write_pass_lang(finally_result);
848: } else {
849: // no exception in try/catch, writing processed body_code or catch_code
850: r.write_pass_lang(result.processed_code);
851: }
1.179 misha 852:
1.74 paf 853: }
854:
1.138 paf 855: static void _throw_operator(Request&, MethodParams& params) {
1.178 misha 856: if(params.count()==1 && !params[0].is_string()) {
1.129 paf 857: if(HashStringValue *hash=params[0].get_hash()) {
858: const char* type=0;
859: if(Value* value=hash->get(exception_type_part_name))
1.78 paf 860: type=value->as_string().cstr();
1.129 paf 861: const String* source=0;
862: if(Value* value=hash->get(exception_source_part_name))
1.74 paf 863: source=&value->as_string();
1.138 paf 864: const char* comment=0;
1.129 paf 865: if(Value* value=hash->get(exception_comment_part_name))
1.74 paf 866: comment=value->as_string().cstr();
867:
1.78 paf 868: throw Exception(type,
1.129 paf 869: source?source:0,
870: "%s", comment?comment:"");
1.74 paf 871: } else
1.166 misha 872: throw Exception(PARSER_RUNTIME,
1.129 paf 873: 0,
1.178 misha 874: "one-param version has hash or string param");
1.74 paf 875: } else {
1.129 paf 876: const char* type=params.as_string(0, "type must be string").cstr();
1.178 misha 877: const String* source=params.count()>1? ¶ms.as_string(1, "source must be string"):0;
878: const char* comment=params.count()>2? params.as_string(2, "comment must be string").cstr():0;
879: throw Exception(type, source, "%s", comment?comment:"");
1.74 paf 880: }
1.132 paf 881: }
1.129 paf 882:
1.150 paf 883: static void _sleep_operator(Request& r, MethodParams& params) {
884: double seconds=params.as_double(0, "seconds must be double", r);
1.206 moko 885: if(seconds>0)
886: pa_sleep((int)trunc(seconds), (int)trunc((seconds-trunc(seconds))*1000000));
1.150 paf 887: }
888:
1.129 paf 889: #if defined(WIN32) && defined(_DEBUG)
890: # define PA_BPT
1.138 paf 891: static void _bpt(Request&, MethodParams&) {
1.129 paf 892: _asm int 3;
893: }
894: #endif
895:
1.10 paf 896: // constructor
897:
1.226 moko 898: VClassMAIN::VClassMAIN(): VClass(MAIN_CLASS_NAME) {
1.129 paf 899:
900: #ifdef PA_BPT
901: // ^bpt[]
902: add_native_method("bpt", Method::CT_ANY, _bpt, 0, 0);
903: #endif
1.121 paf 904:
1.1 paf 905: // ^if(condition){code-when-true}
906: // ^if(condition){code-when-true}{code-when-false}
1.200 moko 907: // ^if(condition){code-when-true} (another condition){code-when-true} ... {code-when-false}
908: add_native_method("if", Method::CT_ANY, _if, 2, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 909:
1.194 misha 910: // ^untaint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
911: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 912:
1.194 misha 913: // ^taint[as-is|uri|sql|js|html|html-typo|regex|parser-code]{code}
914: add_native_method("taint", Method::CT_ANY, _taint, 1, 2, Method::CO_WITHOUT_FRAME);
1.1 paf 915:
1.205 moko 916: // ^apply-taint[untaint lang][string]
917: add_native_method("apply-taint", Method::CT_ANY, _apply_taint, 1, 2, Method::CO_WITHOUT_FRAME);
918:
1.216 moko 919: // ^process{code}
920: // ^process[context]{code}[options hash]
1.146 paf 921: add_native_method("process", Method::CT_ANY, _process, 1, 3);
1.1 paf 922:
923: // ^rem{code}
1.185 misha 924: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000, Method::CO_WITHOUT_FRAME);
1.1 paf 925:
926: // ^while(condition){code}
1.185 misha 927: add_native_method("while", Method::CT_ANY, _while, 2, 3, Method::CO_WITHOUT_FRAME);
1.1 paf 928:
1.216 moko 929: // ^use[file[;options hash]]
930: add_native_method("use", Method::CT_ANY, _use, 1, 2);
1.1 paf 931:
1.164 paf 932: // ^break[]
1.227 moko 933: // ^break(condition)
934: add_native_method("break", Method::CT_ANY, _break, 0, 1, Method::CO_WITHOUT_FRAME);
1.185 misha 935:
1.164 paf 936: // ^continue[]
1.227 moko 937: // ^continue(condition)
938: add_native_method("continue", Method::CT_ANY, _continue, 0, 1, Method::CO_WITHOUT_FRAME);
1.185 misha 939:
1.54 paf 940: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.239 moko 941: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1);
1.1 paf 942:
943: // ^eval(expr)
944: // ^eval(expr)[format]
1.185 misha 945: add_native_method("eval", Method::CT_ANY, _eval, 1, 2, Method::CO_WITHOUT_FRAME);
1.52 parser 946:
1.1 paf 947: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 948: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
949:
1.63 paf 950:
1.136 paf 951: // ^cache[file_spec](time){code}[{catch code}] time=0 no cache
1.65 paf 952: // ^cache[file_spec] delete cache
1.161 paf 953: // ^cache[] get current expiration time
954: add_native_method("cache", Method::CT_ANY, _cache, 0, 4);
1.63 paf 955:
1.28 parser 956: // switch
957:
958: // ^switch[value]{cases}
1.185 misha 959: add_native_method("switch", Method::CT_ANY, _switch, 2, 2, Method::CO_WITHOUT_FRAME);
1.28 parser 960:
961: // ^case[value]{code}
1.185 misha 962: add_native_method("case", Method::CT_ANY, _case, 2, 10000, Method::CO_WITHOUT_FRAME);
1.74 paf 963:
964: // try-catch
965:
966: // ^try{code}{catch code}
1.185 misha 967: add_native_method("try", Method::CT_ANY, _try_operator, 2, 3, Method::CO_WITHOUT_FRAME);
1.74 paf 968: // ^throw[$exception hash]
969: // ^throw[type;source;comment]
970: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
971:
1.150 paf 972: add_native_method("sleep", Method::CT_ANY, _sleep_operator, 1, 1);
1.10 paf 973: }
1.11 paf 974:
975: // constructor & configurator
1.1 paf 976:
1.129 paf 977: VStateless_class& VClassMAIN_create() {
978: return *new VClassMAIN;
1.1 paf 979: }
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