Annotation of parser3/src/classes/op.C, revision 1.115
1.1 paf 1: /** @file
1.9 paf 2: Parser: parser @b operators.
1.1 paf 3:
1.70 paf 4: Copyright (c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com)
1.71 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.98 paf 6: */
1.1 paf 7:
1.115 ! paf 8: static const char* IDENT_OP_C="$Date: 2002/10/14 15:44:22 $";
1.1 paf 9:
1.13 paf 10: #include "classes.h"
1.1 paf 11: #include "pa_common.h"
12: #include "pa_request.h"
13: #include "pa_vint.h"
14: #include "pa_sql_connection.h"
1.79 paf 15: #include "pa_vdate.h"
1.105 paf 16: #include "pa_vmethod_frame.h"
1.1 paf 17:
1.18 parser 18: // limits
19:
20: #define MAX_LOOPS 10000
21:
1.10 paf 22: // defines
23:
1.82 paf 24: #define CASE_DEFAULT_VALUE "DEFAULT"
1.11 paf 25:
1.10 paf 26: // class
27:
1.113 paf 28: class VClassMAIN: public VClass {
1.10 paf 29: public:
1.113 paf 30: VClassMAIN(Pool& apool);
1.10 paf 31: };
32:
33: // methods
34:
1.5 paf 35: static void _if(Request& r, const String&, MethodParams *params) {
1.48 parser 36: Value& condition_code=params->as_junction(0, "condition must be expression");
1.1 paf 37:
1.81 paf 38: bool condition=r.process_to_value(condition_code,
1.83 paf 39: /*0/*no name* /,*/
1.1 paf 40: false/*don't intercept string*/).as_bool();
1.6 paf 41: if(condition)
1.85 paf 42: r.write_pass_lang(r.process(params->as_junction(1, "'then' parameter must be code")));
1.50 parser 43: else if(params->size()>2)
1.85 paf 44: r.write_pass_lang(r.process(params->as_junction(2, "'else' parameter must be code")));
1.1 paf 45: }
46:
1.5 paf 47: static void _untaint(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 48: Pool& pool=r.pool();
49:
1.60 paf 50: uchar lang;
1.59 paf 51: if(params->size()==1)
52: lang=String::UL_AS_IS; // mark as simply 'tainted'. useful in html from sql
53: else {
54: const String& lang_name=params->as_string(0, "lang must be string");
1.60 paf 55: lang=untaint_lang_name2enum->get_int(lang_name);
1.59 paf 56: if(!lang)
1.78 paf 57: throw Exception(0,
1.59 paf 58: &lang_name,
59: "invalid taint language");
60: }
1.1 paf 61:
62: {
1.59 paf 63: Value& vbody=params->as_junction(params->size()-1, "body must be code");
1.1 paf 64:
65: Temp_lang temp_lang(r, lang); // set temporarily specified ^untaint[language;
1.86 paf 66: r.write_pass_lang(r.process(vbody)); // process marking tainted with that lang
1.1 paf 67: }
68: }
69:
1.5 paf 70: static void _taint(Request& r, const String&, MethodParams *params) {
1.1 paf 71: Pool& pool=r.pool();
72:
1.60 paf 73: uchar lang;
1.1 paf 74: if(params->size()==1)
75: lang=String::UL_TAINTED; // mark as simply 'tainted'. useful in table:set
76: else {
1.48 parser 77: const String& lang_name=params->as_string(0, "lang must be string");
1.60 paf 78: lang=untaint_lang_name2enum->get_int(lang_name);
1.1 paf 79: if(!lang)
1.78 paf 80: throw Exception(0,
1.3 paf 81: &lang_name,
82: "invalid taint language");
1.1 paf 83: }
84:
85: {
1.34 parser 86: Value& vbody=params->as_no_junction(params->size()-1, "body must not be code");
1.1 paf 87:
1.90 paf 88: String& result=*new(pool) String(pool);
1.1 paf 89: result.append(
90: vbody.as_string(), // process marking tainted with that lang
91: lang, true); // force result language to specified
92: r.write_pass_lang(result);
93: }
94: }
95:
1.5 paf 96: static void _process(Request& r, const String& method_name, MethodParams *params) {
1.97 paf 97: Pool& pool=r.pool();
1.73 paf 98: const Method *main_method;
1.1 paf 99: {
1.114 paf 100: Value& vjunction=params->as_junction(0, "body must be code");
101:
102: //VStateless_class& self_class=*r.get_self()->get_class();
1.115 ! paf 103: //make this param. with this: as default
1.114 paf 104: VStateless_class *self_class=vjunction.get_junction()->self.get_class();
105: if(!self_class)
106: throw Exception(0,
107: &method_name,
108: "has no self class");
109:
110: // evaluate source to process
111: const String& source=r.process_to_string(vjunction);
112:
1.73 paf 113: // temporary remove language change
114: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
1.1 paf 115: // temporary zero @main so to maybe-replace it in processed code
1.114 paf 116: Temp_method temp_method_main(*self_class, r.main_method_name, 0);
1.1 paf 117: // temporary zero @auto so it wouldn't be auto-called in Request::use_buf
1.114 paf 118: Temp_method temp_method_auto(*self_class, *auto_method_name, 0);
1.1 paf 119:
1.101 paf 120: // calculate pseudo file name of processed chars
121: // would be something like "/some/file(4) process"
122: char local_place[MAX_STRING];
123: #ifndef NO_STRING_ORIGIN
124: const Origin& source_origin=source.origin();
125: const Origin& method_origin=method_name.origin();
126: size_t place_size;
127: if(source_origin.file==method_origin.file)
128: place_size=snprintf(local_place, MAX_STRING, "%s(%d) %s", // same file
129: source_origin.file?source_origin.file:"unknown_file", 1+source_origin.line,
130: method_name.cstr())+1;
131: else // different files ^process{external__file_text__or__sql}
132: place_size=snprintf(local_place, MAX_STRING, "%s",
133: source_origin.file?source_origin.file:"unknown_file")+1;
134: #else
135: strncpy(local_place, method_name.cstr(), MAX_STRING-1); place[MAX_STRING-1]=0;
136: size_t place_size=strlen(local_place)+1;
137: #endif
138: char *heap_place=(char *)r.malloc(place_size);
139: memcpy(heap_place, local_place, place_size);
1.1 paf 140:
141: // process source code, append processed methods to 'self' class
142: // maybe-define new @main
1.114 paf 143: r.use_buf(*self_class,
1.67 paf 144: source.cstr(String::UL_UNSPECIFIED, r.connection(0)),
1.97 paf 145: *new(pool) String(pool, heap_place, place_size, true /*tainted*/),
1.113 paf 146: heap_place);
1.1 paf 147:
1.73 paf 148: // main_method
1.114 paf 149: main_method=self_class->get_method(r.main_method_name);
1.73 paf 150: }
151: // after restoring current-request-lang
152: // maybe-execute @main[]
153: if(main_method) {
154: // execute!
155: r.execute(*main_method->parser_code);
1.1 paf 156: }
157: }
158:
1.5 paf 159: static void _rem(Request& r, const String&, MethodParams *params) {
1.34 parser 160: params->as_junction(0, "body must be code");
1.1 paf 161: }
162:
1.5 paf 163: static void _while(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 164: Pool& pool=r.pool();
165:
1.34 parser 166: Value& vcondition=params->as_junction(0, "condition must be expression");
167: Value& body=params->as_junction(1, "body must be code");
1.1 paf 168:
169: // while...
170: int endless_loop_count=0;
171: while(true) {
1.18 parser 172: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
1.78 paf 173: throw Exception("parser.runtime",
1.1 paf 174: &method_name,
175: "endless loop detected");
176:
1.86 paf 177: bool condition=r.process_to_value(vcondition,
1.83 paf 178: /*0/*no name* /,*/
1.1 paf 179: false/*don't intercept string*/).as_bool();
180: if(!condition) // ...condition is true
181: break;
182:
183: // write processed body
1.86 paf 184: r.write_pass_lang(r.process(body));
1.1 paf 185: }
186: }
187:
1.5 paf 188: static void _use(Request& r, const String& method_name, MethodParams *params) {
1.34 parser 189: Value& vfile=params->as_no_junction(0, "file name must not be code");
1.113 paf 190: r.use_file(r.main_class, vfile.as_string());
1.1 paf 191: }
192:
1.5 paf 193: static void _for(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 194: Pool& pool=r.pool();
1.48 parser 195: const String& var_name=params->as_string(0, "var name must be string");
196: int from=params->as_int(1, "from must be int", r);
197: int to=params->as_int(2, "to must be int", r);
1.34 parser 198: Value& body_code=params->as_junction(3, "body must be code");
1.50 parser 199: Value *delim_maybe_code=params->size()>4?¶ms->get(4):0;
1.1 paf 200:
1.57 paf 201: if(to-from>=MAX_LOOPS) // too long loop?
1.78 paf 202: throw Exception("parser.runtime",
1.57 paf 203: &method_name,
204: "endless loop detected");
205:
1.1 paf 206: bool need_delim=false;
207: VInt *vint=new(pool) VInt(pool, 0);
1.111 paf 208: r.get_method_frame()->put_element(var_name, vint, false);
1.1 paf 209: for(int i=from; i<=to; i++) {
210: vint->set_int(i);
211:
1.108 paf 212: StringOrValue sv_processed=r.process(body_code);
213: const String *s_processed=sv_processed.get_string();
214: if(delim_maybe_code && s_processed && s_processed->size()) { // delimiter set and we have body
215: if(need_delim) // need delim & iteration produced string?
1.86 paf 216: r.write_pass_lang(r.process(*delim_maybe_code));
1.1 paf 217: need_delim=true;
218: }
1.108 paf 219: r.write_pass_lang(sv_processed);
1.1 paf 220: }
221: }
222:
1.15 paf 223: static void _eval(Request& r, const String& method_name, MethodParams *params) {
1.34 parser 224: Value& expr=params->as_junction(0, "need expression");
1.1 paf 225: // evaluate expresion
1.91 paf 226: Value *value_result=r.process_to_value(expr,
1.83 paf 227: /*0/*no name YET* /,*/
1.1 paf 228: true/*don't intercept string*/).as_expr_result();
1.50 parser 229: if(params->size()>1) {
1.34 parser 230: Value& fmt=params->as_no_junction(1, "fmt must not be code");
1.1 paf 231:
232: Pool& pool=r.pool();
233: String& string=*new(pool) String(pool);
1.91 paf 234: string.APPEND_CONST(format(pool, value_result->as_double(), fmt.as_string().cstr()));
235: r.write_no_lang(string);
236: } else
237: r.write_no_lang(*value_result);
1.1 paf 238: }
239:
1.42 parser 240: static void _connect(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 241: Pool& pool=r.pool();
1.63 paf 242: #ifdef RESOURCES_DEBUG
243: struct timeval mt[2];
244: #endif
1.34 parser 245: Value& url=params->as_no_junction(0, "url must not be code");
246: Value& body_code=params->as_junction(1, "body must be code");
1.1 paf 247:
1.113 paf 248: Table *protocol2driver_and_client=0;
249: if(Value *sql=r.main_class.get_element(*new(pool) String(pool, MAIN_SQL_NAME), &r.main_class, false)) {
250: if(Value *element=sql->get_element(*new(pool) String(pool, MAIN_SQL_DRIVERS_NAME), sql, false)) {
251: protocol2driver_and_client=element->get_table();
252: }
253: }
1.11 paf 254:
1.63 paf 255: #ifdef RESOURCES_DEBUG
256: //measure:before
257: gettimeofday(&mt[0],NULL);
258: #endif
1.1 paf 259: // connect
1.67 paf 260: SQL_Connection_ptr connection=SQL_driver_manager->get_connection(
1.42 parser 261: url.as_string(), method_name, protocol2driver_and_client);
1.1 paf 262:
1.63 paf 263: #ifdef RESOURCES_DEBUG
264: //measure:after connect
265: gettimeofday(&mt[1],NULL);
266:
267: double t[2];
268: for(int i=0;i<2;i++)
269: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
270:
271: r.sql_connect_time+=t[1]-t[0];
272: #endif
1.67 paf 273: Temp_connection temp_connection(r, connection.get());
1.1 paf 274: // execute body
1.53 parser 275: try {
1.86 paf 276: r.write_assign_lang(r.process(body_code));
1.75 paf 277: } catch(...) { // process problem
1.67 paf 278: connection->mark_to_rollback();
279: /*re*/throw;
1.1 paf 280: }
281: }
282:
1.41 parser 283: #ifndef DOXYGEN
1.28 parser 284: struct Switch_data {
1.82 paf 285: Request *r;
1.28 parser 286: Value *searching;
287: Value *found;
288: Value *_default;
289: };
1.41 parser 290: #endif
1.28 parser 291: static void _switch(Request& r, const String&, MethodParams *params) {
1.82 paf 292: Switch_data data={&r, &r.process_to_value(params->get(0))};
1.79 paf 293: Temp_hash_value switch_data_setter(r.classes_conf, *switch_data_name, &data);
1.28 parser 294:
1.83 paf 295: Value& cases_code=params->as_junction(1, "switch cases must be code");
1.82 paf 296: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
297: // because of stacked WWrapper used there as wcontext
1.84 paf 298: r.process(cases_code, true/*intercept_string*/);
1.83 paf 299: if(Value *selected_code=data.found ? data.found : data._default) {
300: // setting code context, would execute in ^switch[...]{>>context<<}
1.105 paf 301: //selected_code->get_junction()->change_context(cases_code.get_junction());
1.107 paf 302: r.write_pass_lang(r.process(*selected_code));
1.83 paf 303: }
1.28 parser 304: }
305:
1.38 parser 306: static void _case(Request& r, const String& method_name, MethodParams *params) {
307: Pool& pool=r.pool();
308:
309: Switch_data *data=static_cast<Switch_data *>(r.classes_conf.get(*switch_data_name));
310: if(!data)
1.78 paf 311: throw Exception("parser.runtime",
1.38 parser 312: &method_name,
313: "without switch");
1.28 parser 314:
315: int count=params->size();
1.34 parser 316: Value *code=¶ms->as_junction(--count, "case result must be code");
1.83 paf 317:
318: // killing context for safety, would execute in ^switch[...]{>>context<<}
319: // reason: context is stacked, and it would become invalid afterwards
1.105 paf 320: //code->get_junction()->change_context(0);
1.83 paf 321:
1.28 parser 322: for(int i=0; i<count; i++) {
1.81 paf 323: Value& value=r.process_to_value(params->get(i));
1.28 parser 324:
1.82 paf 325: if(value.as_string() == CASE_DEFAULT_VALUE) {
1.38 parser 326: data->_default=code;
1.28 parser 327: break;
328: }
329:
330: bool matches;
1.38 parser 331: if(data->searching->is_string())
332: matches=data->searching->as_string() == value.as_string();
1.28 parser 333: else
1.38 parser 334: matches=data->searching->as_double() == value.as_double();
1.28 parser 335:
336: if(matches) {
1.82 paf 337: if(data->found)
338: throw Exception("parser.runtime",
339: &method_name,
340: "duplicate found");
341:
1.38 parser 342: data->found=code;
1.28 parser 343: break;
344: }
345: }
346: }
347:
1.63 paf 348: // cache--
349:
350: // consts
351:
1.79 paf 352: const int DATA_STRING_SERIALIZED_VERSION=0x0002;
1.63 paf 353:
354: // helper types
355:
356: #ifndef DOXYGEN
357: struct Data_string_serialized_prolog {
358: int version;
1.79 paf 359: time_t expires;
1.63 paf 360: };
361: #endif
362:
1.68 paf 363: void cache_delete(const String& file_spec) {
364: file_delete(file_spec, false/*fail_on_read_problem*/);
1.63 paf 365: }
1.69 paf 366:
367: #ifndef DOXYGEN
1.79 paf 368: struct Cache_data {
369: time_t expires;
370: };
1.69 paf 371: struct Locked_process_and_cache_put_action_info {
372: Request *r;
1.79 paf 373: Cache_data *data;
1.81 paf 374: Value *body_code; const String *evaluated_body;
1.69 paf 375: };
376: #endif
377: static void locked_process_and_cache_put_action(int f, void *context) {
378: Locked_process_and_cache_put_action_info& info=
379: *static_cast<Locked_process_and_cache_put_action_info *>(context);
380:
381: // body->process
1.81 paf 382: info.evaluated_body=&info.r->process_to_string(*info.body_code);
1.69 paf 383:
1.79 paf 384: // expiration time not spoiled by ^cache(0) or something?
385: if(info.data->expires > time(0)) {
386: // string -serialize> buffer
387: void *data; size_t data_size;
1.81 paf 388: info.evaluated_body->serialize(
1.79 paf 389: sizeof(Data_string_serialized_prolog),
390: data, data_size);
391: Data_string_serialized_prolog& prolog=
392: *static_cast<Data_string_serialized_prolog *>(data);
393: prolog.version=DATA_STRING_SERIALIZED_VERSION;
394: prolog.expires=info.data->expires;
395:
396: // buffer -write> file
397: write(f, data, data_size);
398: } else // expired!
399: info.data->expires=0; // flag it so that could be easily checked by caller
1.69 paf 400: }
1.81 paf 401: const String *locked_process_and_cache_put(Request& r,
1.69 paf 402: Value& body_code,
1.79 paf 403: Cache_data& data,
1.69 paf 404: const String& file_spec) {
405: Locked_process_and_cache_put_action_info info={
406: &r,
1.81 paf 407: &data,
408: &body_code
1.69 paf 409: };
410:
1.81 paf 411: const String *result=file_write_action_under_lock(
1.69 paf 412: file_spec,
413: "cache_put", locked_process_and_cache_put_action, &info,
414: false/*as_text*/,
415: false/*do_append*/,
1.96 paf 416: false/*block*/,
417: false/*fail on lock problem*/) ? info.evaluated_body: 0;
1.100 paf 418: time_t now=time(0);
419: if(data.expires<=now)
1.79 paf 420: cache_delete(file_spec);
421: return result;
1.63 paf 422: }
1.79 paf 423: String *cache_get(Pool& pool, const String& file_spec, time_t now) {
1.63 paf 424: void* data; size_t data_size;
1.72 paf 425: if(file_read(pool, file_spec,
1.63 paf 426: data, data_size,
427: false/*as_text*/,
1.69 paf 428: false/*fail_on_read_problem*/)
1.72 paf 429: && data_size/* ignore reads which are empty due to
430: non-unary open+lockEX conflict with lockSH */) {
1.63 paf 431:
1.72 paf 432: Data_string_serialized_prolog& prolog=
433: *static_cast<Data_string_serialized_prolog *>(data);
1.63 paf 434:
1.72 paf 435: String *result=new(pool) String(pool);
436: if(
437: data_size>=sizeof(Data_string_serialized_prolog)
438: && prolog.version==DATA_STRING_SERIALIZED_VERSION
1.79 paf 439: && prolog.expires > now
1.72 paf 440: && result->deserialize(
441: sizeof(Data_string_serialized_prolog), data, data_size, file_spec.cstr()))
442: return result;
443: }
1.63 paf 444:
1.72 paf 445: return 0;
1.63 paf 446: }
1.79 paf 447: static time_t as_expires(Request& r, const String& method_name, MethodParams *params,
448: int index, time_t now) {
449: time_t result;
450: Value& vlifespan_or_expires=params->get(index);
1.104 paf 451: if(Value *vdate=vlifespan_or_expires.as(VDATE_TYPE, false))
452: result=static_cast<VDate *>(vdate)->get_time();
1.79 paf 453: else
454: result=now+(time_t)params->as_double(index, "lifespan must be date or number", r);
455:
456: return result;
457: }
458: static const String as_file_spec(Request&r, MethodParams *params, int index) {
459: return r.absolute(params->as_string(index, "filespec must be string"));
460: }
1.63 paf 461: static void _cache(Request& r, const String& method_name, MethodParams *params) {
462: Pool& pool=r.pool();
1.79 paf 463: time_t now=time(0);
464:
465: // ^cache[filename] ^cache(seconds) ^cache[expires date]
466: if(params->size()==1) {
467: if(params->get(0).is_string()) { // filename?
468: cache_delete(as_file_spec(r, params, 0));
469: return;
470: }
471:
472: // secods|expires date
473: Cache_data *data=static_cast<Cache_data *>(r.classes_conf.get(*cache_data_name));
474: if(!data)
475: throw Exception("parser.runtime",
476: &method_name,
477: "expire-time reducing instruction without cache");
478:
479: time_t expires=as_expires(r, method_name, params, 0, now);
480: if(expires < data->expires)
481: data->expires=expires;
482:
483: return;
484: }
1.63 paf 485:
486: // file_spec, expires, body code
1.65 paf 487: const String &file_spec=r.absolute(params->as_string(0, "filespec must be string"));
488:
1.79 paf 489: Cache_data data;
490: Temp_hash_value cache_data_setter(r.classes_conf, *cache_data_name, &data);
491: data.expires=as_expires(r, method_name, params, 1, now);
1.63 paf 492: Value& body_code=params->as_junction(2, "body must be code");
493:
1.79 paf 494: if(data.expires>now) { // valid 'expires' specified? try cached copy...
1.69 paf 495: // hence we don't hope to have unary create/lockEX
496: // we need some plan to live in a life like that, so...
497: // worst races plan:
498: // A B
499: // open
500: // |open
501: // lockSH
502: // |nonblocking-lockEX fails
503: // unlockSH
504: // close, cache_get returns 0
505: // open
506: // nonblocking-lockEX succeeds; process, write, close
507: // |retry1: open
508: // ...
509: // |lockSH succeeds; ...
510:
511: for(int retry=0; retry<2; retry++) {
1.79 paf 512: if(String *cached_body=cache_get(pool, file_spec, now)) { // have cached copy?
513: // write it out
514: r.write_assign_lang(*cached_body);
515: // happy with it
516: return;
517: }
1.69 paf 518:
519: // non-blocked lock; process; cache it
1.81 paf 520: if(const String*processed_body=
521: locked_process_and_cache_put(r, body_code, data, file_spec)) {
1.63 paf 522: // write it out
1.69 paf 523: r.write_assign_lang(*processed_body);
1.63 paf 524: // happy with it
525: return;
1.69 paf 526: } else { // somebody writing result right now
527: pa_sleep(0, 500000); // waiting half a second
528: retry=0; // prolonging our wait, than could cache_get it, without processing body_code
1.63 paf 529: }
1.69 paf 530: }
1.78 paf 531: throw Exception(0,
1.69 paf 532: &file_spec,
533: "locking problem");
534: } else {
1.79 paf 535: // instructed not to cache; forget cached copy
1.68 paf 536: cache_delete(file_spec);
1.69 paf 537: // process
1.81 paf 538: const String& processed_body=r.process_to_string(body_code);
1.69 paf 539: // write it out
540: r.write_assign_lang(processed_body);
541: // happy with it
542: return;
543: }
544: // never reached
1.63 paf 545: }
546:
1.74 paf 547: // also used in pa_request.C to pass param to @unhandled_exception
548: VHash& exception2vhash(Pool& pool, const Exception& e) {
549: VHash& result=*new(pool) VHash(pool);
550: Hash& hash=result.hash(0);
1.94 paf 551: if(const char *type=e.type(true))
1.78 paf 552: hash.put(*exception_type_part_name, new(pool) VString(*new(pool) String(pool, type)));
1.76 paf 553: if(const String *asource=e.problem_source()) {
554: String& source=*new(pool) String(pool);
555: source.append(*asource, String::UL_TAINTED, true/*forced*/);
1.74 paf 556:
1.76 paf 557: hash.put(*exception_source_part_name, new(pool) VString(source));
1.74 paf 558: #ifndef NO_STRING_ORIGIN
1.76 paf 559: const Origin& origin=source.origin();
1.89 paf 560: hash.put(*new(pool) String(pool, "file", 0, true),
1.74 paf 561: new(pool) VString(*new(pool) String(pool, origin.file)));
562: hash.put(*new(pool) String(pool, "lineno"),
563: new(pool) VInt(pool, 1+origin.line));
564: #endif
565: }
1.94 paf 566: if(const char *ecomment=e.comment(true)) {
1.74 paf 567: int comment_size=strlen(ecomment);
568: char *pcomment=(char *)pool.malloc(comment_size);
569: memcpy(pcomment, ecomment, comment_size);
570: hash.put(*exception_comment_part_name,
1.76 paf 571: new(pool) VString(*new(pool) String(pool, pcomment, comment_size, true/*tainted*/)));
1.74 paf 572: }
573: hash.put(*exception_handled_part_name,
574: new(pool) VBool(pool, false));
575:
576: return result;
577: }
578:
579: static void _try_operator(Request& r, const String& method_name, MethodParams *params) {
580: Pool& pool=r.pool();
581:
582: Value& body_code=params->as_junction(0, "body_code must be code");
583: Value& catch_code=params->as_junction(1, "catch_code must be code");
584:
1.86 paf 585: StringOrValue result;
1.74 paf 586: try {
1.112 paf 587: Request_context_saver context_saved(r); // taking snapshot of request processing status, restoring it at }
1.86 paf 588: result=r.process(body_code);
1.112 paf 589: context_saved.restore(); // manually restoring context
1.74 paf 590: } catch(const Exception& e) {
591: VHash& vhash=exception2vhash(pool, e);
592:
593: Junction *junction=catch_code.get_junction();
1.105 paf 594: Value *method_frame=junction->method_frame;
595: Value *saved_exception_var_value=method_frame->get_element(*exception_var_name, method_frame, false);
596: junction->method_frame->put_element(*exception_var_name, &vhash, false);
1.86 paf 597: result=r.process(catch_code);
1.74 paf 598: bool handled=false;
599: if(Value *value=static_cast<Value *>(vhash.hash(0).get(*exception_handled_part_name)))
600: handled=value->as_bool();
1.105 paf 601: junction->method_frame->put_element(*exception_var_name, saved_exception_var_value, false);
1.74 paf 602:
603: if(!handled)
604: throw(e); // rethrow
605: }
606: // write it out
1.86 paf 607: r.write_pass_lang(result);
1.74 paf 608: }
609:
610: static void _throw_operator(Request& r, const String& method_name, MethodParams *params) {
611: Pool& pool=r.pool();
612:
613: if(params->size()==1) {
614: Value& param0=params->get(0);
615: if(Hash *hash=param0.get_hash(&method_name)) {
1.78 paf 616: const char *type=0;
1.74 paf 617: if(Value *value=static_cast<Value *>(hash->get(*exception_type_part_name)))
1.78 paf 618: type=value->as_string().cstr();
1.74 paf 619: const String *source=0;
620: if(Value *value=static_cast<Value *>(hash->get(*exception_source_part_name)))
621: source=&value->as_string();
622: const char *comment=0;
623: if(Value *value=
624: static_cast<Value *>(hash->get(*exception_comment_part_name)))
625: comment=value->as_string().cstr();
626:
1.78 paf 627: throw Exception(type,
1.74 paf 628: source?source:&method_name,
629: comment);
630: } else
1.78 paf 631: throw Exception("parser.runtime",
1.74 paf 632: &method_name,
633: "one-param version has hash param");
634: } else {
1.78 paf 635: const char *type=params->as_string(0, "type must be string").cstr();
1.74 paf 636: const String& source=params->as_string(1, "source must be string");
1.92 paf 637: const char *comment=params->size()>2?params->as_string(2, "comment must be string").cstr():0;
1.97 paf 638: throw Exception(type, &source, "%s", comment?comment:"");
1.74 paf 639: }
640: }
641:
1.10 paf 642: // constructor
643:
1.113 paf 644: VClassMAIN::VClassMAIN(Pool& apool): VClass(apool) {
1.1 paf 645: // ^if(condition){code-when-true}
646: // ^if(condition){code-when-true}{code-when-false}
1.10 paf 647: add_native_method("if", Method::CT_ANY, _if, 2, 3);
1.1 paf 648:
649: // ^untaint[as-is|uri|sql|js|html|html-typo]{code}
1.59 paf 650: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2);
1.1 paf 651:
652: // ^taint[as-is|uri|sql|js|html|html-typo]{code}
1.10 paf 653: add_native_method("taint", Method::CT_ANY, _taint, 1, 2);
1.1 paf 654:
655: // ^process[code]
1.10 paf 656: add_native_method("process", Method::CT_ANY, _process, 1, 1);
1.1 paf 657:
658: // ^rem{code}
1.51 parser 659: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000);
1.1 paf 660:
661: // ^while(condition){code}
1.10 paf 662: add_native_method("while", Method::CT_ANY, _while, 2, 2);
1.1 paf 663:
664: // ^use[file]
1.10 paf 665: add_native_method("use", Method::CT_ANY, _use, 1, 1);
1.1 paf 666:
1.54 paf 667: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.10 paf 668: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1);
1.1 paf 669:
670: // ^eval(expr)
671: // ^eval(expr)[format]
1.10 paf 672: add_native_method("eval", Method::CT_ANY, _eval, 1, 2);
1.52 parser 673:
1.1 paf 674: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 675: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
676:
1.63 paf 677:
1.65 paf 678: // ^cache[file_spec] delete cache
1.63 paf 679: // ^cache[file_spec](time){code} time=0 no cache
1.65 paf 680: add_native_method("cache", Method::CT_ANY, _cache, 1, 3);
1.63 paf 681:
1.28 parser 682: // switch
683:
684: // ^switch[value]{cases}
685: add_native_method("switch", Method::CT_ANY, _switch, 2, 2);
686:
687: // ^case[value]{code}
1.51 parser 688: add_native_method("case", Method::CT_ANY, _case, 2, 10000);
1.74 paf 689:
690: // try-catch
691:
692: // ^try{code}{catch code}
693: add_native_method("try", Method::CT_ANY, _try_operator, 2, 2);
694: // ^throw[$exception hash]
695: // ^throw[type;source;comment]
696: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
697:
1.10 paf 698: }
1.11 paf 699:
700: // constructor & configurator
1.1 paf 701:
1.113 paf 702: VClass& VClassMAIN_create(Pool& pool) {
703: return *new(pool) VClassMAIN(pool);
1.1 paf 704: }
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