Annotation of parser3/src/classes/op.C, revision 1.118
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:
1.118 ! paf 8: static const char* IDENT_OP_C="$Date: 2002/10/15 10:09:51 $";
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;
1.118 ! paf 99: VStateless_class *target_class;
1.1 paf 100: {
1.116 paf 101: Value& vjunction=params->as_junction(params->size()-1, "body must be code");
1.114 paf 102:
1.116 paf 103: Value *vtarget;
104: vtarget=params->size()>1?
105: ¶ms->as_no_junction(0, "target must not be code")
106: :r.get_method_frame()->caller();
107: if(!vtarget)
108: throw Exception("parser.runtime",
1.114 paf 109: &method_name,
1.116 paf 110: "no caller"); // can't be, somebody really called ^process
1.114 paf 111:
1.118 ! paf 112: target_class=vtarget->get_class();
1.116 paf 113: if(!target_class)
114: throw Exception("parser.runtime",
115: &method_name,
116: "no target class");
117:
1.114 paf 118: // evaluate source to process
119: const String& source=r.process_to_string(vjunction);
120:
1.73 paf 121: // temporary remove language change
122: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
1.1 paf 123: // temporary zero @main so to maybe-replace it in processed code
1.116 paf 124: Temp_method temp_method_main(*target_class, r.main_method_name, 0);
1.1 paf 125: // temporary zero @auto so it wouldn't be auto-called in Request::use_buf
1.116 paf 126: Temp_method temp_method_auto(*target_class, *auto_method_name, 0);
1.1 paf 127:
1.101 paf 128: // calculate pseudo file name of processed chars
129: // would be something like "/some/file(4) process"
130: char local_place[MAX_STRING];
131: #ifndef NO_STRING_ORIGIN
132: const Origin& source_origin=source.origin();
133: const Origin& method_origin=method_name.origin();
134: size_t place_size;
135: if(source_origin.file==method_origin.file)
136: place_size=snprintf(local_place, MAX_STRING, "%s(%d) %s", // same file
137: source_origin.file?source_origin.file:"unknown_file", 1+source_origin.line,
138: method_name.cstr())+1;
139: else // different files ^process{external__file_text__or__sql}
140: place_size=snprintf(local_place, MAX_STRING, "%s",
141: source_origin.file?source_origin.file:"unknown_file")+1;
142: #else
143: strncpy(local_place, method_name.cstr(), MAX_STRING-1); place[MAX_STRING-1]=0;
144: size_t place_size=strlen(local_place)+1;
145: #endif
146: char *heap_place=(char *)r.malloc(place_size);
147: memcpy(heap_place, local_place, place_size);
1.1 paf 148:
149: // process source code, append processed methods to 'self' class
150: // maybe-define new @main
1.116 paf 151: r.use_buf(*target_class,
1.67 paf 152: source.cstr(String::UL_UNSPECIFIED, r.connection(0)),
1.97 paf 153: *new(pool) String(pool, heap_place, place_size, true /*tainted*/),
1.113 paf 154: heap_place);
1.1 paf 155:
1.73 paf 156: // main_method
1.116 paf 157: main_method=target_class->get_method(r.main_method_name);
1.73 paf 158: }
159: // after restoring current-request-lang
160: // maybe-execute @main[]
161: if(main_method) {
1.118 ! paf 162: // temporarily set request's self to target_class
! 163: Temp_request_self trs(r, *target_class);
! 164: // temporarily set method_frame's self to target_class
! 165: Temp_method_frame_self tmfs(*r.get_method_frame(), *target_class);
1.73 paf 166: // execute!
167: r.execute(*main_method->parser_code);
1.1 paf 168: }
169: }
170:
1.5 paf 171: static void _rem(Request& r, const String&, MethodParams *params) {
1.34 parser 172: params->as_junction(0, "body must be code");
1.1 paf 173: }
174:
1.5 paf 175: static void _while(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 176: Pool& pool=r.pool();
177:
1.34 parser 178: Value& vcondition=params->as_junction(0, "condition must be expression");
179: Value& body=params->as_junction(1, "body must be code");
1.1 paf 180:
181: // while...
182: int endless_loop_count=0;
183: while(true) {
1.18 parser 184: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
1.78 paf 185: throw Exception("parser.runtime",
1.1 paf 186: &method_name,
187: "endless loop detected");
188:
1.86 paf 189: bool condition=r.process_to_value(vcondition,
1.83 paf 190: /*0/*no name* /,*/
1.1 paf 191: false/*don't intercept string*/).as_bool();
192: if(!condition) // ...condition is true
193: break;
194:
195: // write processed body
1.86 paf 196: r.write_pass_lang(r.process(body));
1.1 paf 197: }
198: }
199:
1.5 paf 200: static void _use(Request& r, const String& method_name, MethodParams *params) {
1.34 parser 201: Value& vfile=params->as_no_junction(0, "file name must not be code");
1.113 paf 202: r.use_file(r.main_class, vfile.as_string());
1.1 paf 203: }
204:
1.5 paf 205: static void _for(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 206: Pool& pool=r.pool();
1.48 parser 207: const String& var_name=params->as_string(0, "var name must be string");
208: int from=params->as_int(1, "from must be int", r);
209: int to=params->as_int(2, "to must be int", r);
1.34 parser 210: Value& body_code=params->as_junction(3, "body must be code");
1.50 parser 211: Value *delim_maybe_code=params->size()>4?¶ms->get(4):0;
1.1 paf 212:
1.57 paf 213: if(to-from>=MAX_LOOPS) // too long loop?
1.78 paf 214: throw Exception("parser.runtime",
1.57 paf 215: &method_name,
216: "endless loop detected");
217:
1.1 paf 218: bool need_delim=false;
219: VInt *vint=new(pool) VInt(pool, 0);
1.117 paf 220: r.get_method_frame()->caller()->put_element(var_name, vint, false);
1.1 paf 221: for(int i=from; i<=to; i++) {
222: vint->set_int(i);
223:
1.108 paf 224: StringOrValue sv_processed=r.process(body_code);
225: const String *s_processed=sv_processed.get_string();
226: if(delim_maybe_code && s_processed && s_processed->size()) { // delimiter set and we have body
227: if(need_delim) // need delim & iteration produced string?
1.86 paf 228: r.write_pass_lang(r.process(*delim_maybe_code));
1.1 paf 229: need_delim=true;
230: }
1.108 paf 231: r.write_pass_lang(sv_processed);
1.1 paf 232: }
233: }
234:
1.15 paf 235: static void _eval(Request& r, const String& method_name, MethodParams *params) {
1.34 parser 236: Value& expr=params->as_junction(0, "need expression");
1.1 paf 237: // evaluate expresion
1.91 paf 238: Value *value_result=r.process_to_value(expr,
1.83 paf 239: /*0/*no name YET* /,*/
1.1 paf 240: true/*don't intercept string*/).as_expr_result();
1.50 parser 241: if(params->size()>1) {
1.34 parser 242: Value& fmt=params->as_no_junction(1, "fmt must not be code");
1.1 paf 243:
244: Pool& pool=r.pool();
245: String& string=*new(pool) String(pool);
1.91 paf 246: string.APPEND_CONST(format(pool, value_result->as_double(), fmt.as_string().cstr()));
247: r.write_no_lang(string);
248: } else
249: r.write_no_lang(*value_result);
1.1 paf 250: }
251:
1.42 parser 252: static void _connect(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 253: Pool& pool=r.pool();
1.63 paf 254: #ifdef RESOURCES_DEBUG
255: struct timeval mt[2];
256: #endif
1.34 parser 257: Value& url=params->as_no_junction(0, "url must not be code");
258: Value& body_code=params->as_junction(1, "body must be code");
1.1 paf 259:
1.113 paf 260: Table *protocol2driver_and_client=0;
261: if(Value *sql=r.main_class.get_element(*new(pool) String(pool, MAIN_SQL_NAME), &r.main_class, false)) {
262: if(Value *element=sql->get_element(*new(pool) String(pool, MAIN_SQL_DRIVERS_NAME), sql, false)) {
263: protocol2driver_and_client=element->get_table();
264: }
265: }
1.11 paf 266:
1.63 paf 267: #ifdef RESOURCES_DEBUG
268: //measure:before
269: gettimeofday(&mt[0],NULL);
270: #endif
1.1 paf 271: // connect
1.67 paf 272: SQL_Connection_ptr connection=SQL_driver_manager->get_connection(
1.42 parser 273: url.as_string(), method_name, protocol2driver_and_client);
1.1 paf 274:
1.63 paf 275: #ifdef RESOURCES_DEBUG
276: //measure:after connect
277: gettimeofday(&mt[1],NULL);
278:
279: double t[2];
280: for(int i=0;i<2;i++)
281: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
282:
283: r.sql_connect_time+=t[1]-t[0];
284: #endif
1.67 paf 285: Temp_connection temp_connection(r, connection.get());
1.1 paf 286: // execute body
1.53 parser 287: try {
1.86 paf 288: r.write_assign_lang(r.process(body_code));
1.75 paf 289: } catch(...) { // process problem
1.67 paf 290: connection->mark_to_rollback();
291: /*re*/throw;
1.1 paf 292: }
293: }
294:
1.41 parser 295: #ifndef DOXYGEN
1.28 parser 296: struct Switch_data {
1.82 paf 297: Request *r;
1.28 parser 298: Value *searching;
299: Value *found;
300: Value *_default;
301: };
1.41 parser 302: #endif
1.28 parser 303: static void _switch(Request& r, const String&, MethodParams *params) {
1.82 paf 304: Switch_data data={&r, &r.process_to_value(params->get(0))};
1.79 paf 305: Temp_hash_value switch_data_setter(r.classes_conf, *switch_data_name, &data);
1.28 parser 306:
1.83 paf 307: Value& cases_code=params->as_junction(1, "switch cases must be code");
1.82 paf 308: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
309: // because of stacked WWrapper used there as wcontext
1.84 paf 310: r.process(cases_code, true/*intercept_string*/);
1.83 paf 311: if(Value *selected_code=data.found ? data.found : data._default) {
312: // setting code context, would execute in ^switch[...]{>>context<<}
1.105 paf 313: //selected_code->get_junction()->change_context(cases_code.get_junction());
1.107 paf 314: r.write_pass_lang(r.process(*selected_code));
1.83 paf 315: }
1.28 parser 316: }
317:
1.38 parser 318: static void _case(Request& r, const String& method_name, MethodParams *params) {
319: Pool& pool=r.pool();
320:
321: Switch_data *data=static_cast<Switch_data *>(r.classes_conf.get(*switch_data_name));
322: if(!data)
1.78 paf 323: throw Exception("parser.runtime",
1.38 parser 324: &method_name,
325: "without switch");
1.28 parser 326:
327: int count=params->size();
1.34 parser 328: Value *code=¶ms->as_junction(--count, "case result must be code");
1.83 paf 329:
330: // killing context for safety, would execute in ^switch[...]{>>context<<}
331: // reason: context is stacked, and it would become invalid afterwards
1.105 paf 332: //code->get_junction()->change_context(0);
1.83 paf 333:
1.28 parser 334: for(int i=0; i<count; i++) {
1.81 paf 335: Value& value=r.process_to_value(params->get(i));
1.28 parser 336:
1.82 paf 337: if(value.as_string() == CASE_DEFAULT_VALUE) {
1.38 parser 338: data->_default=code;
1.28 parser 339: break;
340: }
341:
342: bool matches;
1.38 parser 343: if(data->searching->is_string())
344: matches=data->searching->as_string() == value.as_string();
1.28 parser 345: else
1.38 parser 346: matches=data->searching->as_double() == value.as_double();
1.28 parser 347:
348: if(matches) {
1.82 paf 349: if(data->found)
350: throw Exception("parser.runtime",
351: &method_name,
352: "duplicate found");
353:
1.38 parser 354: data->found=code;
1.28 parser 355: break;
356: }
357: }
358: }
359:
1.63 paf 360: // cache--
361:
362: // consts
363:
1.79 paf 364: const int DATA_STRING_SERIALIZED_VERSION=0x0002;
1.63 paf 365:
366: // helper types
367:
368: #ifndef DOXYGEN
369: struct Data_string_serialized_prolog {
370: int version;
1.79 paf 371: time_t expires;
1.63 paf 372: };
373: #endif
374:
1.68 paf 375: void cache_delete(const String& file_spec) {
376: file_delete(file_spec, false/*fail_on_read_problem*/);
1.63 paf 377: }
1.69 paf 378:
379: #ifndef DOXYGEN
1.79 paf 380: struct Cache_data {
381: time_t expires;
382: };
1.69 paf 383: struct Locked_process_and_cache_put_action_info {
384: Request *r;
1.79 paf 385: Cache_data *data;
1.81 paf 386: Value *body_code; const String *evaluated_body;
1.69 paf 387: };
388: #endif
389: static void locked_process_and_cache_put_action(int f, void *context) {
390: Locked_process_and_cache_put_action_info& info=
391: *static_cast<Locked_process_and_cache_put_action_info *>(context);
392:
393: // body->process
1.81 paf 394: info.evaluated_body=&info.r->process_to_string(*info.body_code);
1.69 paf 395:
1.79 paf 396: // expiration time not spoiled by ^cache(0) or something?
397: if(info.data->expires > time(0)) {
398: // string -serialize> buffer
399: void *data; size_t data_size;
1.81 paf 400: info.evaluated_body->serialize(
1.79 paf 401: sizeof(Data_string_serialized_prolog),
402: data, data_size);
403: Data_string_serialized_prolog& prolog=
404: *static_cast<Data_string_serialized_prolog *>(data);
405: prolog.version=DATA_STRING_SERIALIZED_VERSION;
406: prolog.expires=info.data->expires;
407:
408: // buffer -write> file
409: write(f, data, data_size);
410: } else // expired!
411: info.data->expires=0; // flag it so that could be easily checked by caller
1.69 paf 412: }
1.81 paf 413: const String *locked_process_and_cache_put(Request& r,
1.69 paf 414: Value& body_code,
1.79 paf 415: Cache_data& data,
1.69 paf 416: const String& file_spec) {
417: Locked_process_and_cache_put_action_info info={
418: &r,
1.81 paf 419: &data,
420: &body_code
1.69 paf 421: };
422:
1.81 paf 423: const String *result=file_write_action_under_lock(
1.69 paf 424: file_spec,
425: "cache_put", locked_process_and_cache_put_action, &info,
426: false/*as_text*/,
427: false/*do_append*/,
1.96 paf 428: false/*block*/,
429: false/*fail on lock problem*/) ? info.evaluated_body: 0;
1.100 paf 430: time_t now=time(0);
431: if(data.expires<=now)
1.79 paf 432: cache_delete(file_spec);
433: return result;
1.63 paf 434: }
1.79 paf 435: String *cache_get(Pool& pool, const String& file_spec, time_t now) {
1.63 paf 436: void* data; size_t data_size;
1.72 paf 437: if(file_read(pool, file_spec,
1.63 paf 438: data, data_size,
439: false/*as_text*/,
1.69 paf 440: false/*fail_on_read_problem*/)
1.72 paf 441: && data_size/* ignore reads which are empty due to
442: non-unary open+lockEX conflict with lockSH */) {
1.63 paf 443:
1.72 paf 444: Data_string_serialized_prolog& prolog=
445: *static_cast<Data_string_serialized_prolog *>(data);
1.63 paf 446:
1.72 paf 447: String *result=new(pool) String(pool);
448: if(
449: data_size>=sizeof(Data_string_serialized_prolog)
450: && prolog.version==DATA_STRING_SERIALIZED_VERSION
1.79 paf 451: && prolog.expires > now
1.72 paf 452: && result->deserialize(
453: sizeof(Data_string_serialized_prolog), data, data_size, file_spec.cstr()))
454: return result;
455: }
1.63 paf 456:
1.72 paf 457: return 0;
1.63 paf 458: }
1.79 paf 459: static time_t as_expires(Request& r, const String& method_name, MethodParams *params,
460: int index, time_t now) {
461: time_t result;
462: Value& vlifespan_or_expires=params->get(index);
1.104 paf 463: if(Value *vdate=vlifespan_or_expires.as(VDATE_TYPE, false))
464: result=static_cast<VDate *>(vdate)->get_time();
1.79 paf 465: else
466: result=now+(time_t)params->as_double(index, "lifespan must be date or number", r);
467:
468: return result;
469: }
470: static const String as_file_spec(Request&r, MethodParams *params, int index) {
471: return r.absolute(params->as_string(index, "filespec must be string"));
472: }
1.63 paf 473: static void _cache(Request& r, const String& method_name, MethodParams *params) {
474: Pool& pool=r.pool();
1.79 paf 475: time_t now=time(0);
476:
477: // ^cache[filename] ^cache(seconds) ^cache[expires date]
478: if(params->size()==1) {
479: if(params->get(0).is_string()) { // filename?
480: cache_delete(as_file_spec(r, params, 0));
481: return;
482: }
483:
484: // secods|expires date
485: Cache_data *data=static_cast<Cache_data *>(r.classes_conf.get(*cache_data_name));
486: if(!data)
487: throw Exception("parser.runtime",
488: &method_name,
489: "expire-time reducing instruction without cache");
490:
491: time_t expires=as_expires(r, method_name, params, 0, now);
492: if(expires < data->expires)
493: data->expires=expires;
494:
495: return;
496: }
1.63 paf 497:
498: // file_spec, expires, body code
1.65 paf 499: const String &file_spec=r.absolute(params->as_string(0, "filespec must be string"));
500:
1.79 paf 501: Cache_data data;
502: Temp_hash_value cache_data_setter(r.classes_conf, *cache_data_name, &data);
503: data.expires=as_expires(r, method_name, params, 1, now);
1.63 paf 504: Value& body_code=params->as_junction(2, "body must be code");
505:
1.79 paf 506: if(data.expires>now) { // valid 'expires' specified? try cached copy...
1.69 paf 507: // hence we don't hope to have unary create/lockEX
508: // we need some plan to live in a life like that, so...
509: // worst races plan:
510: // A B
511: // open
512: // |open
513: // lockSH
514: // |nonblocking-lockEX fails
515: // unlockSH
516: // close, cache_get returns 0
517: // open
518: // nonblocking-lockEX succeeds; process, write, close
519: // |retry1: open
520: // ...
521: // |lockSH succeeds; ...
522:
523: for(int retry=0; retry<2; retry++) {
1.79 paf 524: if(String *cached_body=cache_get(pool, file_spec, now)) { // have cached copy?
525: // write it out
526: r.write_assign_lang(*cached_body);
527: // happy with it
528: return;
529: }
1.69 paf 530:
531: // non-blocked lock; process; cache it
1.81 paf 532: if(const String*processed_body=
533: locked_process_and_cache_put(r, body_code, data, file_spec)) {
1.63 paf 534: // write it out
1.69 paf 535: r.write_assign_lang(*processed_body);
1.63 paf 536: // happy with it
537: return;
1.69 paf 538: } else { // somebody writing result right now
539: pa_sleep(0, 500000); // waiting half a second
540: retry=0; // prolonging our wait, than could cache_get it, without processing body_code
1.63 paf 541: }
1.69 paf 542: }
1.78 paf 543: throw Exception(0,
1.69 paf 544: &file_spec,
545: "locking problem");
546: } else {
1.79 paf 547: // instructed not to cache; forget cached copy
1.68 paf 548: cache_delete(file_spec);
1.69 paf 549: // process
1.81 paf 550: const String& processed_body=r.process_to_string(body_code);
1.69 paf 551: // write it out
552: r.write_assign_lang(processed_body);
553: // happy with it
554: return;
555: }
556: // never reached
1.63 paf 557: }
558:
1.74 paf 559: // also used in pa_request.C to pass param to @unhandled_exception
560: VHash& exception2vhash(Pool& pool, const Exception& e) {
561: VHash& result=*new(pool) VHash(pool);
562: Hash& hash=result.hash(0);
1.94 paf 563: if(const char *type=e.type(true))
1.78 paf 564: hash.put(*exception_type_part_name, new(pool) VString(*new(pool) String(pool, type)));
1.76 paf 565: if(const String *asource=e.problem_source()) {
566: String& source=*new(pool) String(pool);
567: source.append(*asource, String::UL_TAINTED, true/*forced*/);
1.74 paf 568:
1.76 paf 569: hash.put(*exception_source_part_name, new(pool) VString(source));
1.74 paf 570: #ifndef NO_STRING_ORIGIN
1.76 paf 571: const Origin& origin=source.origin();
1.89 paf 572: hash.put(*new(pool) String(pool, "file", 0, true),
1.74 paf 573: new(pool) VString(*new(pool) String(pool, origin.file)));
574: hash.put(*new(pool) String(pool, "lineno"),
575: new(pool) VInt(pool, 1+origin.line));
576: #endif
577: }
1.94 paf 578: if(const char *ecomment=e.comment(true)) {
1.74 paf 579: int comment_size=strlen(ecomment);
580: char *pcomment=(char *)pool.malloc(comment_size);
581: memcpy(pcomment, ecomment, comment_size);
582: hash.put(*exception_comment_part_name,
1.76 paf 583: new(pool) VString(*new(pool) String(pool, pcomment, comment_size, true/*tainted*/)));
1.74 paf 584: }
585: hash.put(*exception_handled_part_name,
586: new(pool) VBool(pool, false));
587:
588: return result;
589: }
590:
591: static void _try_operator(Request& r, const String& method_name, MethodParams *params) {
592: Pool& pool=r.pool();
593:
594: Value& body_code=params->as_junction(0, "body_code must be code");
595: Value& catch_code=params->as_junction(1, "catch_code must be code");
596:
1.86 paf 597: StringOrValue result;
1.74 paf 598: try {
1.112 paf 599: Request_context_saver context_saved(r); // taking snapshot of request processing status, restoring it at }
1.86 paf 600: result=r.process(body_code);
1.112 paf 601: context_saved.restore(); // manually restoring context
1.74 paf 602: } catch(const Exception& e) {
603: VHash& vhash=exception2vhash(pool, e);
604:
605: Junction *junction=catch_code.get_junction();
1.105 paf 606: Value *method_frame=junction->method_frame;
607: Value *saved_exception_var_value=method_frame->get_element(*exception_var_name, method_frame, false);
608: junction->method_frame->put_element(*exception_var_name, &vhash, false);
1.86 paf 609: result=r.process(catch_code);
1.74 paf 610: bool handled=false;
611: if(Value *value=static_cast<Value *>(vhash.hash(0).get(*exception_handled_part_name)))
612: handled=value->as_bool();
1.105 paf 613: junction->method_frame->put_element(*exception_var_name, saved_exception_var_value, false);
1.74 paf 614:
615: if(!handled)
616: throw(e); // rethrow
617: }
618: // write it out
1.86 paf 619: r.write_pass_lang(result);
1.74 paf 620: }
621:
622: static void _throw_operator(Request& r, const String& method_name, MethodParams *params) {
623: Pool& pool=r.pool();
624:
625: if(params->size()==1) {
626: Value& param0=params->get(0);
627: if(Hash *hash=param0.get_hash(&method_name)) {
1.78 paf 628: const char *type=0;
1.74 paf 629: if(Value *value=static_cast<Value *>(hash->get(*exception_type_part_name)))
1.78 paf 630: type=value->as_string().cstr();
1.74 paf 631: const String *source=0;
632: if(Value *value=static_cast<Value *>(hash->get(*exception_source_part_name)))
633: source=&value->as_string();
634: const char *comment=0;
635: if(Value *value=
636: static_cast<Value *>(hash->get(*exception_comment_part_name)))
637: comment=value->as_string().cstr();
638:
1.78 paf 639: throw Exception(type,
1.74 paf 640: source?source:&method_name,
641: comment);
642: } else
1.78 paf 643: throw Exception("parser.runtime",
1.74 paf 644: &method_name,
645: "one-param version has hash param");
646: } else {
1.78 paf 647: const char *type=params->as_string(0, "type must be string").cstr();
1.74 paf 648: const String& source=params->as_string(1, "source must be string");
1.92 paf 649: const char *comment=params->size()>2?params->as_string(2, "comment must be string").cstr():0;
1.97 paf 650: throw Exception(type, &source, "%s", comment?comment:"");
1.74 paf 651: }
652: }
653:
1.10 paf 654: // constructor
655:
1.113 paf 656: VClassMAIN::VClassMAIN(Pool& apool): VClass(apool) {
1.1 paf 657: // ^if(condition){code-when-true}
658: // ^if(condition){code-when-true}{code-when-false}
1.10 paf 659: add_native_method("if", Method::CT_ANY, _if, 2, 3);
1.1 paf 660:
661: // ^untaint[as-is|uri|sql|js|html|html-typo]{code}
1.59 paf 662: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2);
1.1 paf 663:
664: // ^taint[as-is|uri|sql|js|html|html-typo]{code}
1.10 paf 665: add_native_method("taint", Method::CT_ANY, _taint, 1, 2);
1.1 paf 666:
667: // ^process[code]
1.116 paf 668: add_native_method("process", Method::CT_ANY, _process, 1, 2);
1.1 paf 669:
670: // ^rem{code}
1.51 parser 671: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000);
1.1 paf 672:
673: // ^while(condition){code}
1.10 paf 674: add_native_method("while", Method::CT_ANY, _while, 2, 2);
1.1 paf 675:
676: // ^use[file]
1.10 paf 677: add_native_method("use", Method::CT_ANY, _use, 1, 1);
1.1 paf 678:
1.54 paf 679: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.10 paf 680: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1);
1.1 paf 681:
682: // ^eval(expr)
683: // ^eval(expr)[format]
1.10 paf 684: add_native_method("eval", Method::CT_ANY, _eval, 1, 2);
1.52 parser 685:
1.1 paf 686: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 687: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
688:
1.63 paf 689:
1.65 paf 690: // ^cache[file_spec] delete cache
1.63 paf 691: // ^cache[file_spec](time){code} time=0 no cache
1.65 paf 692: add_native_method("cache", Method::CT_ANY, _cache, 1, 3);
1.63 paf 693:
1.28 parser 694: // switch
695:
696: // ^switch[value]{cases}
697: add_native_method("switch", Method::CT_ANY, _switch, 2, 2);
698:
699: // ^case[value]{code}
1.51 parser 700: add_native_method("case", Method::CT_ANY, _case, 2, 10000);
1.74 paf 701:
702: // try-catch
703:
704: // ^try{code}{catch code}
705: add_native_method("try", Method::CT_ANY, _try_operator, 2, 2);
706: // ^throw[$exception hash]
707: // ^throw[type;source;comment]
708: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
709:
1.10 paf 710: }
1.11 paf 711:
712: // constructor & configurator
1.1 paf 713:
1.113 paf 714: VClass& VClassMAIN_create(Pool& pool) {
715: return *new(pool) VClassMAIN(pool);
1.1 paf 716: }
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