Annotation of parser3/src/classes/op.C, revision 1.127.2.1
1.1 paf 1: /** @file
1.9 paf 2: Parser: parser @b operators.
1.1 paf 3:
1.127 paf 4: Copyright (c) 2001, 2003 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:
1.127.2.1! paf 8: static const char* IDENT_OP_C="$Date: 2003/01/21 15:51:07 $";
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:
1.127.2.1! paf 33: // helpers
! 34:
! 35: Hash<String, int> Hash untaint_lang_name2enum;
! 36:
1.10 paf 37: // methods
38:
1.5 paf 39: static void _if(Request& r, const String&, MethodParams *params) {
1.48 parser 40: Value& condition_code=params->as_junction(0, "condition must be expression");
1.1 paf 41:
1.81 paf 42: bool condition=r.process_to_value(condition_code,
1.83 paf 43: /*0/*no name* /,*/
1.1 paf 44: false/*don't intercept string*/).as_bool();
1.6 paf 45: if(condition)
1.85 paf 46: r.write_pass_lang(r.process(params->as_junction(1, "'then' parameter must be code")));
1.50 parser 47: else if(params->size()>2)
1.85 paf 48: r.write_pass_lang(r.process(params->as_junction(2, "'else' parameter must be code")));
1.1 paf 49: }
50:
1.5 paf 51: static void _untaint(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 52: Pool& pool=r.pool();
53:
1.60 paf 54: uchar lang;
1.59 paf 55: if(params->size()==1)
56: lang=String::UL_AS_IS; // mark as simply 'tainted'. useful in html from sql
57: else {
58: const String& lang_name=params->as_string(0, "lang must be string");
1.60 paf 59: lang=untaint_lang_name2enum->get_int(lang_name);
1.59 paf 60: if(!lang)
1.78 paf 61: throw Exception(0,
1.59 paf 62: &lang_name,
63: "invalid taint language");
64: }
1.1 paf 65:
66: {
1.59 paf 67: Value& vbody=params->as_junction(params->size()-1, "body must be code");
1.1 paf 68:
69: Temp_lang temp_lang(r, lang); // set temporarily specified ^untaint[language;
1.86 paf 70: r.write_pass_lang(r.process(vbody)); // process marking tainted with that lang
1.1 paf 71: }
72: }
73:
1.5 paf 74: static void _taint(Request& r, const String&, MethodParams *params) {
1.1 paf 75: Pool& pool=r.pool();
76:
1.60 paf 77: uchar lang;
1.1 paf 78: if(params->size()==1)
79: lang=String::UL_TAINTED; // mark as simply 'tainted'. useful in table:set
80: else {
1.48 parser 81: const String& lang_name=params->as_string(0, "lang must be string");
1.60 paf 82: lang=untaint_lang_name2enum->get_int(lang_name);
1.1 paf 83: if(!lang)
1.78 paf 84: throw Exception(0,
1.3 paf 85: &lang_name,
86: "invalid taint language");
1.1 paf 87: }
88:
89: {
1.34 parser 90: Value& vbody=params->as_no_junction(params->size()-1, "body must not be code");
1.1 paf 91:
1.90 paf 92: String& result=*new(pool) String(pool);
1.1 paf 93: result.append(
94: vbody.as_string(), // process marking tainted with that lang
95: lang, true); // force result language to specified
96: r.write_pass_lang(result);
97: }
98: }
99:
1.5 paf 100: static void _process(Request& r, const String& method_name, MethodParams *params) {
1.97 paf 101: Pool& pool=r.pool();
1.73 paf 102: const Method *main_method;
1.119 paf 103: Value& target_self=params->size()>1?
104: params->as_no_junction(0, "target must not be code")
105: :r.get_method_frame()->caller()->self();
1.1 paf 106: {
1.116 paf 107: Value& vjunction=params->as_junction(params->size()-1, "body must be code");
1.114 paf 108:
1.124 paf 109: VStateless_class *target_class=target_self.get_last_derived_class();
1.116 paf 110: if(!target_class)
111: throw Exception("parser.runtime",
112: &method_name,
113: "no target class");
114:
1.114 paf 115: // evaluate source to process
116: const String& source=r.process_to_string(vjunction);
117:
1.73 paf 118: // temporary remove language change
119: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
1.1 paf 120: // temporary zero @main so to maybe-replace it in processed code
1.116 paf 121: Temp_method temp_method_main(*target_class, r.main_method_name, 0);
1.1 paf 122: // temporary zero @auto so it wouldn't be auto-called in Request::use_buf
1.116 paf 123: Temp_method temp_method_auto(*target_class, *auto_method_name, 0);
1.1 paf 124:
1.101 paf 125: // calculate pseudo file name of processed chars
126: // would be something like "/some/file(4) process"
127: char local_place[MAX_STRING];
128: #ifndef NO_STRING_ORIGIN
129: const Origin& source_origin=source.origin();
130: const Origin& method_origin=method_name.origin();
131: size_t place_size;
132: if(source_origin.file==method_origin.file)
133: place_size=snprintf(local_place, MAX_STRING, "%s(%d) %s", // same file
134: source_origin.file?source_origin.file:"unknown_file", 1+source_origin.line,
135: method_name.cstr())+1;
136: else // different files ^process{external__file_text__or__sql}
137: place_size=snprintf(local_place, MAX_STRING, "%s",
138: source_origin.file?source_origin.file:"unknown_file")+1;
139: #else
140: strncpy(local_place, method_name.cstr(), MAX_STRING-1); place[MAX_STRING-1]=0;
141: size_t place_size=strlen(local_place)+1;
142: #endif
143: char *heap_place=(char *)r.malloc(place_size);
144: memcpy(heap_place, local_place, place_size);
1.1 paf 145:
146: // process source code, append processed methods to 'self' class
147: // maybe-define new @main
1.116 paf 148: r.use_buf(*target_class,
1.67 paf 149: source.cstr(String::UL_UNSPECIFIED, r.connection(0)),
1.97 paf 150: *new(pool) String(pool, heap_place, place_size, true /*tainted*/),
1.113 paf 151: heap_place);
1.1 paf 152:
1.73 paf 153: // main_method
1.116 paf 154: main_method=target_class->get_method(r.main_method_name);
1.73 paf 155: }
156: // after restoring current-request-lang
157: // maybe-execute @main[]
158: if(main_method) {
1.119 paf 159: // temporarily set method_frame's self to target_self
160: Temp_method_frame_self tmfs(*r.get_method_frame(), target_self);
1.73 paf 161: // execute!
162: r.execute(*main_method->parser_code);
1.1 paf 163: }
164: }
165:
1.5 paf 166: static void _rem(Request& r, const String&, MethodParams *params) {
1.34 parser 167: params->as_junction(0, "body must be code");
1.1 paf 168: }
169:
1.5 paf 170: static void _while(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 171: Pool& pool=r.pool();
172:
1.34 parser 173: Value& vcondition=params->as_junction(0, "condition must be expression");
174: Value& body=params->as_junction(1, "body must be code");
1.1 paf 175:
176: // while...
177: int endless_loop_count=0;
178: while(true) {
1.18 parser 179: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
1.78 paf 180: throw Exception("parser.runtime",
1.1 paf 181: &method_name,
182: "endless loop detected");
183:
1.86 paf 184: bool condition=r.process_to_value(vcondition,
1.83 paf 185: /*0/*no name* /,*/
1.1 paf 186: false/*don't intercept string*/).as_bool();
187: if(!condition) // ...condition is true
188: break;
189:
190: // write processed body
1.86 paf 191: r.write_pass_lang(r.process(body));
1.1 paf 192: }
193: }
194:
1.5 paf 195: static void _use(Request& r, const String& method_name, MethodParams *params) {
1.34 parser 196: Value& vfile=params->as_no_junction(0, "file name must not be code");
1.113 paf 197: r.use_file(r.main_class, vfile.as_string());
1.1 paf 198: }
199:
1.5 paf 200: static void _for(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 201: Pool& pool=r.pool();
1.48 parser 202: const String& var_name=params->as_string(0, "var name must be string");
203: int from=params->as_int(1, "from must be int", r);
204: int to=params->as_int(2, "to must be int", r);
1.34 parser 205: Value& body_code=params->as_junction(3, "body must be code");
1.50 parser 206: Value *delim_maybe_code=params->size()>4?¶ms->get(4):0;
1.1 paf 207:
1.57 paf 208: if(to-from>=MAX_LOOPS) // too long loop?
1.78 paf 209: throw Exception("parser.runtime",
1.57 paf 210: &method_name,
211: "endless loop detected");
212:
1.1 paf 213: bool need_delim=false;
214: VInt *vint=new(pool) VInt(pool, 0);
1.117 paf 215: r.get_method_frame()->caller()->put_element(var_name, vint, false);
1.1 paf 216: for(int i=from; i<=to; i++) {
217: vint->set_int(i);
218:
1.108 paf 219: StringOrValue sv_processed=r.process(body_code);
220: const String *s_processed=sv_processed.get_string();
221: if(delim_maybe_code && s_processed && s_processed->size()) { // delimiter set and we have body
222: if(need_delim) // need delim & iteration produced string?
1.86 paf 223: r.write_pass_lang(r.process(*delim_maybe_code));
1.1 paf 224: need_delim=true;
225: }
1.108 paf 226: r.write_pass_lang(sv_processed);
1.1 paf 227: }
228: }
229:
1.15 paf 230: static void _eval(Request& r, const String& method_name, MethodParams *params) {
1.34 parser 231: Value& expr=params->as_junction(0, "need expression");
1.1 paf 232: // evaluate expresion
1.91 paf 233: Value *value_result=r.process_to_value(expr,
1.83 paf 234: /*0/*no name YET* /,*/
1.1 paf 235: true/*don't intercept string*/).as_expr_result();
1.50 parser 236: if(params->size()>1) {
1.34 parser 237: Value& fmt=params->as_no_junction(1, "fmt must not be code");
1.1 paf 238:
239: Pool& pool=r.pool();
240: String& string=*new(pool) String(pool);
1.91 paf 241: string.APPEND_CONST(format(pool, value_result->as_double(), fmt.as_string().cstr()));
242: r.write_no_lang(string);
243: } else
244: r.write_no_lang(*value_result);
1.1 paf 245: }
246:
1.42 parser 247: static void _connect(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 248: Pool& pool=r.pool();
1.63 paf 249: #ifdef RESOURCES_DEBUG
250: struct timeval mt[2];
251: #endif
1.34 parser 252: Value& url=params->as_no_junction(0, "url must not be code");
253: Value& body_code=params->as_junction(1, "body must be code");
1.1 paf 254:
1.113 paf 255: Table *protocol2driver_and_client=0;
1.125 paf 256: if(Value *sql=r.main_class.get_element(*new(pool) String(pool, MAIN_SQL_NAME), r.main_class, false)) {
257: if(Value *element=sql->get_element(*new(pool) String(pool, MAIN_SQL_DRIVERS_NAME), *sql, false)) {
1.113 paf 258: protocol2driver_and_client=element->get_table();
259: }
260: }
1.11 paf 261:
1.63 paf 262: #ifdef RESOURCES_DEBUG
263: //measure:before
264: gettimeofday(&mt[0],NULL);
265: #endif
1.1 paf 266: // connect
1.67 paf 267: SQL_Connection_ptr connection=SQL_driver_manager->get_connection(
1.42 parser 268: url.as_string(), method_name, protocol2driver_and_client);
1.1 paf 269:
1.63 paf 270: #ifdef RESOURCES_DEBUG
271: //measure:after connect
272: gettimeofday(&mt[1],NULL);
273:
274: double t[2];
275: for(int i=0;i<2;i++)
276: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
277:
278: r.sql_connect_time+=t[1]-t[0];
279: #endif
1.67 paf 280: Temp_connection temp_connection(r, connection.get());
1.1 paf 281: // execute body
1.53 parser 282: try {
1.86 paf 283: r.write_assign_lang(r.process(body_code));
1.75 paf 284: } catch(...) { // process problem
1.67 paf 285: connection->mark_to_rollback();
286: /*re*/throw;
1.1 paf 287: }
288: }
289:
1.41 parser 290: #ifndef DOXYGEN
1.28 parser 291: struct Switch_data {
1.82 paf 292: Request *r;
1.28 parser 293: Value *searching;
294: Value *found;
295: Value *_default;
296: };
1.41 parser 297: #endif
1.28 parser 298: static void _switch(Request& r, const String&, MethodParams *params) {
1.82 paf 299: Switch_data data={&r, &r.process_to_value(params->get(0))};
1.79 paf 300: Temp_hash_value switch_data_setter(r.classes_conf, *switch_data_name, &data);
1.28 parser 301:
1.83 paf 302: Value& cases_code=params->as_junction(1, "switch cases must be code");
1.82 paf 303: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
304: // because of stacked WWrapper used there as wcontext
1.84 paf 305: r.process(cases_code, true/*intercept_string*/);
1.83 paf 306: if(Value *selected_code=data.found ? data.found : data._default) {
307: // setting code context, would execute in ^switch[...]{>>context<<}
1.105 paf 308: //selected_code->get_junction()->change_context(cases_code.get_junction());
1.107 paf 309: r.write_pass_lang(r.process(*selected_code));
1.83 paf 310: }
1.28 parser 311: }
312:
1.38 parser 313: static void _case(Request& r, const String& method_name, MethodParams *params) {
314: Pool& pool=r.pool();
315:
316: Switch_data *data=static_cast<Switch_data *>(r.classes_conf.get(*switch_data_name));
317: if(!data)
1.78 paf 318: throw Exception("parser.runtime",
1.38 parser 319: &method_name,
320: "without switch");
1.28 parser 321:
322: int count=params->size();
1.34 parser 323: Value *code=¶ms->as_junction(--count, "case result must be code");
1.83 paf 324:
325: // killing context for safety, would execute in ^switch[...]{>>context<<}
326: // reason: context is stacked, and it would become invalid afterwards
1.105 paf 327: //code->get_junction()->change_context(0);
1.83 paf 328:
1.28 parser 329: for(int i=0; i<count; i++) {
1.81 paf 330: Value& value=r.process_to_value(params->get(i));
1.28 parser 331:
1.82 paf 332: if(value.as_string() == CASE_DEFAULT_VALUE) {
1.38 parser 333: data->_default=code;
1.28 parser 334: break;
335: }
336:
337: bool matches;
1.38 parser 338: if(data->searching->is_string())
339: matches=data->searching->as_string() == value.as_string();
1.28 parser 340: else
1.38 parser 341: matches=data->searching->as_double() == value.as_double();
1.28 parser 342:
343: if(matches) {
1.82 paf 344: if(data->found)
345: throw Exception("parser.runtime",
346: &method_name,
347: "duplicate found");
348:
1.38 parser 349: data->found=code;
1.28 parser 350: break;
351: }
352: }
353: }
354:
1.63 paf 355: // cache--
356:
357: // consts
358:
1.79 paf 359: const int DATA_STRING_SERIALIZED_VERSION=0x0002;
1.63 paf 360:
361: // helper types
362:
363: #ifndef DOXYGEN
364: struct Data_string_serialized_prolog {
365: int version;
1.79 paf 366: time_t expires;
1.63 paf 367: };
368: #endif
369:
1.68 paf 370: void cache_delete(const String& file_spec) {
371: file_delete(file_spec, false/*fail_on_read_problem*/);
1.63 paf 372: }
1.69 paf 373:
374: #ifndef DOXYGEN
1.79 paf 375: struct Cache_data {
376: time_t expires;
377: };
1.69 paf 378: struct Locked_process_and_cache_put_action_info {
379: Request *r;
1.79 paf 380: Cache_data *data;
1.81 paf 381: Value *body_code; const String *evaluated_body;
1.69 paf 382: };
383: #endif
384: static void locked_process_and_cache_put_action(int f, void *context) {
385: Locked_process_and_cache_put_action_info& info=
386: *static_cast<Locked_process_and_cache_put_action_info *>(context);
387:
388: // body->process
1.81 paf 389: info.evaluated_body=&info.r->process_to_string(*info.body_code);
1.69 paf 390:
1.79 paf 391: // expiration time not spoiled by ^cache(0) or something?
392: if(info.data->expires > time(0)) {
393: // string -serialize> buffer
394: void *data; size_t data_size;
1.81 paf 395: info.evaluated_body->serialize(
1.79 paf 396: sizeof(Data_string_serialized_prolog),
397: data, data_size);
398: Data_string_serialized_prolog& prolog=
399: *static_cast<Data_string_serialized_prolog *>(data);
400: prolog.version=DATA_STRING_SERIALIZED_VERSION;
401: prolog.expires=info.data->expires;
402:
403: // buffer -write> file
404: write(f, data, data_size);
405: } else // expired!
406: info.data->expires=0; // flag it so that could be easily checked by caller
1.69 paf 407: }
1.81 paf 408: const String *locked_process_and_cache_put(Request& r,
1.69 paf 409: Value& body_code,
1.79 paf 410: Cache_data& data,
1.69 paf 411: const String& file_spec) {
412: Locked_process_and_cache_put_action_info info={
413: &r,
1.81 paf 414: &data,
415: &body_code
1.69 paf 416: };
417:
1.81 paf 418: const String *result=file_write_action_under_lock(
1.69 paf 419: file_spec,
420: "cache_put", locked_process_and_cache_put_action, &info,
421: false/*as_text*/,
422: false/*do_append*/,
1.96 paf 423: false/*block*/,
424: false/*fail on lock problem*/) ? info.evaluated_body: 0;
1.100 paf 425: time_t now=time(0);
426: if(data.expires<=now)
1.79 paf 427: cache_delete(file_spec);
428: return result;
1.63 paf 429: }
1.79 paf 430: String *cache_get(Pool& pool, const String& file_spec, time_t now) {
1.63 paf 431: void* data; size_t data_size;
1.72 paf 432: if(file_read(pool, file_spec,
1.63 paf 433: data, data_size,
434: false/*as_text*/,
1.126 paf 435: 0, 0, //no params&out_fields
1.69 paf 436: false/*fail_on_read_problem*/)
1.72 paf 437: && data_size/* ignore reads which are empty due to
438: non-unary open+lockEX conflict with lockSH */) {
1.63 paf 439:
1.72 paf 440: Data_string_serialized_prolog& prolog=
441: *static_cast<Data_string_serialized_prolog *>(data);
1.63 paf 442:
1.72 paf 443: String *result=new(pool) String(pool);
444: if(
445: data_size>=sizeof(Data_string_serialized_prolog)
446: && prolog.version==DATA_STRING_SERIALIZED_VERSION
1.79 paf 447: && prolog.expires > now
1.72 paf 448: && result->deserialize(
449: sizeof(Data_string_serialized_prolog), data, data_size, file_spec.cstr()))
450: return result;
451: }
1.63 paf 452:
1.72 paf 453: return 0;
1.63 paf 454: }
1.79 paf 455: static time_t as_expires(Request& r, const String& method_name, MethodParams *params,
456: int index, time_t now) {
457: time_t result;
458: Value& vlifespan_or_expires=params->get(index);
1.104 paf 459: if(Value *vdate=vlifespan_or_expires.as(VDATE_TYPE, false))
460: result=static_cast<VDate *>(vdate)->get_time();
1.79 paf 461: else
462: result=now+(time_t)params->as_double(index, "lifespan must be date or number", r);
463:
464: return result;
465: }
466: static const String as_file_spec(Request&r, MethodParams *params, int index) {
467: return r.absolute(params->as_string(index, "filespec must be string"));
468: }
1.63 paf 469: static void _cache(Request& r, const String& method_name, MethodParams *params) {
470: Pool& pool=r.pool();
1.79 paf 471: time_t now=time(0);
472:
473: // ^cache[filename] ^cache(seconds) ^cache[expires date]
474: if(params->size()==1) {
475: if(params->get(0).is_string()) { // filename?
476: cache_delete(as_file_spec(r, params, 0));
477: return;
478: }
479:
480: // secods|expires date
481: Cache_data *data=static_cast<Cache_data *>(r.classes_conf.get(*cache_data_name));
482: if(!data)
483: throw Exception("parser.runtime",
484: &method_name,
485: "expire-time reducing instruction without cache");
486:
487: time_t expires=as_expires(r, method_name, params, 0, now);
488: if(expires < data->expires)
489: data->expires=expires;
490:
491: return;
492: }
1.63 paf 493:
494: // file_spec, expires, body code
1.65 paf 495: const String &file_spec=r.absolute(params->as_string(0, "filespec must be string"));
496:
1.79 paf 497: Cache_data data;
498: Temp_hash_value cache_data_setter(r.classes_conf, *cache_data_name, &data);
499: data.expires=as_expires(r, method_name, params, 1, now);
1.63 paf 500: Value& body_code=params->as_junction(2, "body must be code");
501:
1.79 paf 502: if(data.expires>now) { // valid 'expires' specified? try cached copy...
1.69 paf 503: // hence we don't hope to have unary create/lockEX
504: // we need some plan to live in a life like that, so...
505: // worst races plan:
506: // A B
507: // open
508: // |open
509: // lockSH
510: // |nonblocking-lockEX fails
511: // unlockSH
512: // close, cache_get returns 0
513: // open
514: // nonblocking-lockEX succeeds; process, write, close
515: // |retry1: open
516: // ...
517: // |lockSH succeeds; ...
518:
519: for(int retry=0; retry<2; retry++) {
1.79 paf 520: if(String *cached_body=cache_get(pool, file_spec, now)) { // have cached copy?
521: // write it out
522: r.write_assign_lang(*cached_body);
523: // happy with it
524: return;
525: }
1.69 paf 526:
527: // non-blocked lock; process; cache it
1.81 paf 528: if(const String*processed_body=
529: locked_process_and_cache_put(r, body_code, data, file_spec)) {
1.63 paf 530: // write it out
1.69 paf 531: r.write_assign_lang(*processed_body);
1.63 paf 532: // happy with it
533: return;
1.69 paf 534: } else { // somebody writing result right now
535: pa_sleep(0, 500000); // waiting half a second
536: retry=0; // prolonging our wait, than could cache_get it, without processing body_code
1.63 paf 537: }
1.69 paf 538: }
1.78 paf 539: throw Exception(0,
1.69 paf 540: &file_spec,
541: "locking problem");
542: } else {
1.79 paf 543: // instructed not to cache; forget cached copy
1.68 paf 544: cache_delete(file_spec);
1.69 paf 545: // process
1.81 paf 546: const String& processed_body=r.process_to_string(body_code);
1.69 paf 547: // write it out
548: r.write_assign_lang(processed_body);
549: // happy with it
550: return;
551: }
552: // never reached
1.63 paf 553: }
554:
1.74 paf 555: // also used in pa_request.C to pass param to @unhandled_exception
556: VHash& exception2vhash(Pool& pool, const Exception& e) {
557: VHash& result=*new(pool) VHash(pool);
558: Hash& hash=result.hash(0);
1.94 paf 559: if(const char *type=e.type(true))
1.78 paf 560: hash.put(*exception_type_part_name, new(pool) VString(*new(pool) String(pool, type)));
1.76 paf 561: if(const String *asource=e.problem_source()) {
562: String& source=*new(pool) String(pool);
563: source.append(*asource, String::UL_TAINTED, true/*forced*/);
1.74 paf 564:
1.76 paf 565: hash.put(*exception_source_part_name, new(pool) VString(source));
1.74 paf 566: #ifndef NO_STRING_ORIGIN
1.76 paf 567: const Origin& origin=source.origin();
1.89 paf 568: hash.put(*new(pool) String(pool, "file", 0, true),
1.74 paf 569: new(pool) VString(*new(pool) String(pool, origin.file)));
570: hash.put(*new(pool) String(pool, "lineno"),
571: new(pool) VInt(pool, 1+origin.line));
572: #endif
573: }
1.94 paf 574: if(const char *ecomment=e.comment(true)) {
1.74 paf 575: int comment_size=strlen(ecomment);
576: char *pcomment=(char *)pool.malloc(comment_size);
577: memcpy(pcomment, ecomment, comment_size);
578: hash.put(*exception_comment_part_name,
1.76 paf 579: new(pool) VString(*new(pool) String(pool, pcomment, comment_size, true/*tainted*/)));
1.74 paf 580: }
581: hash.put(*exception_handled_part_name,
582: new(pool) VBool(pool, false));
583:
584: return result;
585: }
586:
587: static void _try_operator(Request& r, const String& method_name, MethodParams *params) {
588: Pool& pool=r.pool();
589:
590: Value& body_code=params->as_junction(0, "body_code must be code");
591: Value& catch_code=params->as_junction(1, "catch_code must be code");
592:
1.86 paf 593: StringOrValue result;
1.123 paf 594: // taking snapshot of try-context
595: Request_context_saver try_context(r);
1.74 paf 596: try {
1.86 paf 597: result=r.process(body_code);
1.74 paf 598: } catch(const Exception& e) {
1.123 paf 599: Request_context_saver throw_context(r); // taking snapshot of throw-context [stack trace contains error]
600: try_context.restore(); // restoring try-context to perform catch-code
601:
1.74 paf 602: VHash& vhash=exception2vhash(pool, e);
603:
604: Junction *junction=catch_code.get_junction();
1.105 paf 605: Value *method_frame=junction->method_frame;
1.125 paf 606: Value *saved_exception_var_value=method_frame->get_element(*exception_var_name, *method_frame, false);
1.105 paf 607: junction->method_frame->put_element(*exception_var_name, &vhash, false);
1.86 paf 608: result=r.process(catch_code);
1.74 paf 609: bool handled=false;
610: if(Value *value=static_cast<Value *>(vhash.hash(0).get(*exception_handled_part_name)))
611: handled=value->as_bool();
1.105 paf 612: junction->method_frame->put_element(*exception_var_name, saved_exception_var_value, false);
1.74 paf 613:
1.123 paf 614: if(!handled) {
615: throw_context.restore(); // restoring throw-context [exception were not handled]
1.74 paf 616: throw(e); // rethrow
1.123 paf 617: }
1.74 paf 618: }
1.123 paf 619: // write out result
1.86 paf 620: r.write_pass_lang(result);
1.74 paf 621: }
622:
623: static void _throw_operator(Request& r, const String& method_name, MethodParams *params) {
624: Pool& pool=r.pool();
625:
626: if(params->size()==1) {
627: Value& param0=params->get(0);
628: if(Hash *hash=param0.get_hash(&method_name)) {
1.78 paf 629: const char *type=0;
1.74 paf 630: if(Value *value=static_cast<Value *>(hash->get(*exception_type_part_name)))
1.78 paf 631: type=value->as_string().cstr();
1.74 paf 632: const String *source=0;
633: if(Value *value=static_cast<Value *>(hash->get(*exception_source_part_name)))
634: source=&value->as_string();
635: const char *comment=0;
636: if(Value *value=
637: static_cast<Value *>(hash->get(*exception_comment_part_name)))
638: comment=value->as_string().cstr();
639:
1.78 paf 640: throw Exception(type,
1.74 paf 641: source?source:&method_name,
642: comment);
643: } else
1.78 paf 644: throw Exception("parser.runtime",
1.74 paf 645: &method_name,
646: "one-param version has hash param");
647: } else {
1.78 paf 648: const char *type=params->as_string(0, "type must be string").cstr();
1.74 paf 649: const String& source=params->as_string(1, "source must be string");
1.92 paf 650: const char *comment=params->size()>2?params->as_string(2, "comment must be string").cstr():0;
1.97 paf 651: throw Exception(type, &source, "%s", comment?comment:"");
1.74 paf 652: }
653: }
654:
1.10 paf 655: // constructor
656:
1.113 paf 657: VClassMAIN::VClassMAIN(Pool& apool): VClass(apool) {
1.121 paf 658: set_name(*NEW String(pool(), MAIN_CLASS_NAME));
659:
1.1 paf 660: // ^if(condition){code-when-true}
661: // ^if(condition){code-when-true}{code-when-false}
1.10 paf 662: add_native_method("if", Method::CT_ANY, _if, 2, 3);
1.1 paf 663:
664: // ^untaint[as-is|uri|sql|js|html|html-typo]{code}
1.59 paf 665: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2);
1.1 paf 666:
667: // ^taint[as-is|uri|sql|js|html|html-typo]{code}
1.10 paf 668: add_native_method("taint", Method::CT_ANY, _taint, 1, 2);
1.1 paf 669:
670: // ^process[code]
1.116 paf 671: add_native_method("process", Method::CT_ANY, _process, 1, 2);
1.1 paf 672:
673: // ^rem{code}
1.51 parser 674: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000);
1.1 paf 675:
676: // ^while(condition){code}
1.10 paf 677: add_native_method("while", Method::CT_ANY, _while, 2, 2);
1.1 paf 678:
679: // ^use[file]
1.10 paf 680: add_native_method("use", Method::CT_ANY, _use, 1, 1);
1.1 paf 681:
1.54 paf 682: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.10 paf 683: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1);
1.1 paf 684:
685: // ^eval(expr)
686: // ^eval(expr)[format]
1.10 paf 687: add_native_method("eval", Method::CT_ANY, _eval, 1, 2);
1.52 parser 688:
1.1 paf 689: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 690: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
691:
1.63 paf 692:
1.65 paf 693: // ^cache[file_spec] delete cache
1.63 paf 694: // ^cache[file_spec](time){code} time=0 no cache
1.65 paf 695: add_native_method("cache", Method::CT_ANY, _cache, 1, 3);
1.63 paf 696:
1.28 parser 697: // switch
698:
699: // ^switch[value]{cases}
700: add_native_method("switch", Method::CT_ANY, _switch, 2, 2);
701:
702: // ^case[value]{code}
1.51 parser 703: add_native_method("case", Method::CT_ANY, _case, 2, 10000);
1.74 paf 704:
705: // try-catch
706:
707: // ^try{code}{catch code}
708: add_native_method("try", Method::CT_ANY, _try_operator, 2, 2);
709: // ^throw[$exception hash]
710: // ^throw[type;source;comment]
711: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
712:
1.10 paf 713: }
1.11 paf 714:
715: // constructor & configurator
1.1 paf 716:
1.127.2.1! paf 717: #define ULN(cstr, name) \
! 718: String uln##name String(cstr);
! 719: ULN("as-is", as_is);
! 720: ULN("optimized-as-is", optimized_as_is);
! 721: ULN("file-spec", file_spec);
! 722: ULN("http-header", http_header);
! 723: ULN("mail-header", mail_header);
! 724: ULN("uri", uri);
! 725: ULN("table", table);
! 726: ULN("sql", sql);
! 727: ULN("js", js);
! 728: ULN("xml", xml);
! 729: ULN("optimized-xml", optimized_xml);
! 730: ULN("html", html);
! 731: ULN("optimized-html", optimized_html);
! 732: #undef ULN
! 733:
1.113 paf 734: VClass& VClassMAIN_create(Pool& pool) {
1.127.2.1! paf 735: #define ULN(name, LANG) \
! 736: untaint_lang_name2enum.put(uln##name, (int)String::UL_##LANG);
! 737: ULN(as_is, AS_IS);
! 738: ULN(optimized_as_is, AS_IS|String::UL_OPTIMIZE_BIT);
! 739: ULN(file_spec, FILE_SPEC);
! 740: ULN(http_header, HTTP_HEADER);
! 741: ULN(mail_header, MAIL_HEADER);
! 742: ULN(uri, URI);
! 743: ULN(table, TABLE);
! 744: ULN(sql, SQL);
! 745: ULN(js, JS);
! 746: ULN(xml, XML);
! 747: ULN(optimized_xml, XML|String::UL_OPTIMIZE_BIT);
! 748: ULN(html, HTML);
! 749: ULN(optimized_html, HTML|String::UL_OPTIMIZE_BIT);
! 750: #undef ULN
! 751:
1.113 paf 752: return *new(pool) VClassMAIN(pool);
1.1 paf 753: }
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