Annotation of parser3/src/classes/op.C, revision 1.120
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:
1.119 paf 8: static const char* IDENT_OP_C="$Date: 2002/10/15 10:58:34 $";
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;
1.119 paf 99: Value& target_self=params->size()>1?
100: params->as_no_junction(0, "target must not be code")
101: :r.get_method_frame()->caller()->self();
1.1 paf 102: {
1.116 paf 103: Value& vjunction=params->as_junction(params->size()-1, "body must be code");
1.114 paf 104:
1.119 paf 105: VStateless_class *target_class=target_self.get_class();
1.116 paf 106: if(!target_class)
107: throw Exception("parser.runtime",
108: &method_name,
109: "no target class");
110:
1.114 paf 111: // evaluate source to process
112: const String& source=r.process_to_string(vjunction);
113:
1.73 paf 114: // temporary remove language change
115: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
1.1 paf 116: // temporary zero @main so to maybe-replace it in processed code
1.116 paf 117: Temp_method temp_method_main(*target_class, r.main_method_name, 0);
1.1 paf 118: // temporary zero @auto so it wouldn't be auto-called in Request::use_buf
1.116 paf 119: Temp_method temp_method_auto(*target_class, *auto_method_name, 0);
1.1 paf 120:
1.101 paf 121: // calculate pseudo file name of processed chars
122: // would be something like "/some/file(4) process"
123: char local_place[MAX_STRING];
124: #ifndef NO_STRING_ORIGIN
125: const Origin& source_origin=source.origin();
126: const Origin& method_origin=method_name.origin();
127: size_t place_size;
128: if(source_origin.file==method_origin.file)
129: place_size=snprintf(local_place, MAX_STRING, "%s(%d) %s", // same file
130: source_origin.file?source_origin.file:"unknown_file", 1+source_origin.line,
131: method_name.cstr())+1;
132: else // different files ^process{external__file_text__or__sql}
133: place_size=snprintf(local_place, MAX_STRING, "%s",
134: source_origin.file?source_origin.file:"unknown_file")+1;
135: #else
136: strncpy(local_place, method_name.cstr(), MAX_STRING-1); place[MAX_STRING-1]=0;
137: size_t place_size=strlen(local_place)+1;
138: #endif
139: char *heap_place=(char *)r.malloc(place_size);
140: memcpy(heap_place, local_place, place_size);
1.1 paf 141:
142: // process source code, append processed methods to 'self' class
143: // maybe-define new @main
1.116 paf 144: r.use_buf(*target_class,
1.67 paf 145: source.cstr(String::UL_UNSPECIFIED, r.connection(0)),
1.97 paf 146: *new(pool) String(pool, heap_place, place_size, true /*tainted*/),
1.113 paf 147: heap_place);
1.1 paf 148:
1.73 paf 149: // main_method
1.116 paf 150: main_method=target_class->get_method(r.main_method_name);
1.73 paf 151: }
152: // after restoring current-request-lang
153: // maybe-execute @main[]
154: if(main_method) {
1.119 paf 155: // temporarily set request's self to target_self
156: Temp_request_self trs(r, target_self);
157: // temporarily set method_frame's self to target_self
158: Temp_method_frame_self tmfs(*r.get_method_frame(), target_self);
1.73 paf 159: // execute!
160: r.execute(*main_method->parser_code);
1.1 paf 161: }
162: }
163:
1.5 paf 164: static void _rem(Request& r, const String&, MethodParams *params) {
1.34 parser 165: params->as_junction(0, "body must be code");
1.1 paf 166: }
167:
1.5 paf 168: static void _while(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 169: Pool& pool=r.pool();
170:
1.34 parser 171: Value& vcondition=params->as_junction(0, "condition must be expression");
172: Value& body=params->as_junction(1, "body must be code");
1.1 paf 173:
174: // while...
175: int endless_loop_count=0;
176: while(true) {
1.18 parser 177: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
1.78 paf 178: throw Exception("parser.runtime",
1.1 paf 179: &method_name,
180: "endless loop detected");
181:
1.86 paf 182: bool condition=r.process_to_value(vcondition,
1.83 paf 183: /*0/*no name* /,*/
1.1 paf 184: false/*don't intercept string*/).as_bool();
185: if(!condition) // ...condition is true
186: break;
187:
188: // write processed body
1.86 paf 189: r.write_pass_lang(r.process(body));
1.1 paf 190: }
191: }
192:
1.5 paf 193: static void _use(Request& r, const String& method_name, MethodParams *params) {
1.34 parser 194: Value& vfile=params->as_no_junction(0, "file name must not be code");
1.113 paf 195: r.use_file(r.main_class, vfile.as_string());
1.1 paf 196: }
197:
1.5 paf 198: static void _for(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 199: Pool& pool=r.pool();
1.48 parser 200: const String& var_name=params->as_string(0, "var name must be string");
201: int from=params->as_int(1, "from must be int", r);
202: int to=params->as_int(2, "to must be int", r);
1.34 parser 203: Value& body_code=params->as_junction(3, "body must be code");
1.50 parser 204: Value *delim_maybe_code=params->size()>4?¶ms->get(4):0;
1.1 paf 205:
1.57 paf 206: if(to-from>=MAX_LOOPS) // too long loop?
1.78 paf 207: throw Exception("parser.runtime",
1.57 paf 208: &method_name,
209: "endless loop detected");
210:
1.1 paf 211: bool need_delim=false;
212: VInt *vint=new(pool) VInt(pool, 0);
1.117 paf 213: r.get_method_frame()->caller()->put_element(var_name, vint, false);
1.1 paf 214: for(int i=from; i<=to; i++) {
215: vint->set_int(i);
216:
1.108 paf 217: StringOrValue sv_processed=r.process(body_code);
218: const String *s_processed=sv_processed.get_string();
219: if(delim_maybe_code && s_processed && s_processed->size()) { // delimiter set and we have body
220: if(need_delim) // need delim & iteration produced string?
1.86 paf 221: r.write_pass_lang(r.process(*delim_maybe_code));
1.1 paf 222: need_delim=true;
223: }
1.108 paf 224: r.write_pass_lang(sv_processed);
1.1 paf 225: }
226: }
227:
1.15 paf 228: static void _eval(Request& r, const String& method_name, MethodParams *params) {
1.34 parser 229: Value& expr=params->as_junction(0, "need expression");
1.1 paf 230: // evaluate expresion
1.91 paf 231: Value *value_result=r.process_to_value(expr,
1.83 paf 232: /*0/*no name YET* /,*/
1.1 paf 233: true/*don't intercept string*/).as_expr_result();
1.50 parser 234: if(params->size()>1) {
1.34 parser 235: Value& fmt=params->as_no_junction(1, "fmt must not be code");
1.1 paf 236:
237: Pool& pool=r.pool();
238: String& string=*new(pool) String(pool);
1.91 paf 239: string.APPEND_CONST(format(pool, value_result->as_double(), fmt.as_string().cstr()));
240: r.write_no_lang(string);
241: } else
242: r.write_no_lang(*value_result);
1.1 paf 243: }
244:
1.42 parser 245: static void _connect(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 246: Pool& pool=r.pool();
1.63 paf 247: #ifdef RESOURCES_DEBUG
248: struct timeval mt[2];
249: #endif
1.34 parser 250: Value& url=params->as_no_junction(0, "url must not be code");
251: Value& body_code=params->as_junction(1, "body must be code");
1.1 paf 252:
1.113 paf 253: Table *protocol2driver_and_client=0;
254: if(Value *sql=r.main_class.get_element(*new(pool) String(pool, MAIN_SQL_NAME), &r.main_class, false)) {
255: if(Value *element=sql->get_element(*new(pool) String(pool, MAIN_SQL_DRIVERS_NAME), sql, false)) {
256: protocol2driver_and_client=element->get_table();
257: }
258: }
1.11 paf 259:
1.63 paf 260: #ifdef RESOURCES_DEBUG
261: //measure:before
262: gettimeofday(&mt[0],NULL);
263: #endif
1.1 paf 264: // connect
1.67 paf 265: SQL_Connection_ptr connection=SQL_driver_manager->get_connection(
1.42 parser 266: url.as_string(), method_name, protocol2driver_and_client);
1.1 paf 267:
1.63 paf 268: #ifdef RESOURCES_DEBUG
269: //measure:after connect
270: gettimeofday(&mt[1],NULL);
271:
272: double t[2];
273: for(int i=0;i<2;i++)
274: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
275:
276: r.sql_connect_time+=t[1]-t[0];
277: #endif
1.67 paf 278: Temp_connection temp_connection(r, connection.get());
1.1 paf 279: // execute body
1.53 parser 280: try {
1.86 paf 281: r.write_assign_lang(r.process(body_code));
1.75 paf 282: } catch(...) { // process problem
1.67 paf 283: connection->mark_to_rollback();
284: /*re*/throw;
1.1 paf 285: }
286: }
287:
1.41 parser 288: #ifndef DOXYGEN
1.28 parser 289: struct Switch_data {
1.82 paf 290: Request *r;
1.28 parser 291: Value *searching;
292: Value *found;
293: Value *_default;
294: };
1.41 parser 295: #endif
1.28 parser 296: static void _switch(Request& r, const String&, MethodParams *params) {
1.82 paf 297: Switch_data data={&r, &r.process_to_value(params->get(0))};
1.79 paf 298: Temp_hash_value switch_data_setter(r.classes_conf, *switch_data_name, &data);
1.28 parser 299:
1.83 paf 300: Value& cases_code=params->as_junction(1, "switch cases must be code");
1.82 paf 301: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
302: // because of stacked WWrapper used there as wcontext
1.84 paf 303: r.process(cases_code, true/*intercept_string*/);
1.83 paf 304: if(Value *selected_code=data.found ? data.found : data._default) {
305: // setting code context, would execute in ^switch[...]{>>context<<}
1.105 paf 306: //selected_code->get_junction()->change_context(cases_code.get_junction());
1.107 paf 307: r.write_pass_lang(r.process(*selected_code));
1.83 paf 308: }
1.28 parser 309: }
310:
1.38 parser 311: static void _case(Request& r, const String& method_name, MethodParams *params) {
312: Pool& pool=r.pool();
313:
314: Switch_data *data=static_cast<Switch_data *>(r.classes_conf.get(*switch_data_name));
315: if(!data)
1.78 paf 316: throw Exception("parser.runtime",
1.38 parser 317: &method_name,
318: "without switch");
1.28 parser 319:
320: int count=params->size();
1.34 parser 321: Value *code=¶ms->as_junction(--count, "case result must be code");
1.83 paf 322:
323: // killing context for safety, would execute in ^switch[...]{>>context<<}
324: // reason: context is stacked, and it would become invalid afterwards
1.105 paf 325: //code->get_junction()->change_context(0);
1.83 paf 326:
1.28 parser 327: for(int i=0; i<count; i++) {
1.81 paf 328: Value& value=r.process_to_value(params->get(i));
1.28 parser 329:
1.82 paf 330: if(value.as_string() == CASE_DEFAULT_VALUE) {
1.38 parser 331: data->_default=code;
1.28 parser 332: break;
333: }
334:
335: bool matches;
1.38 parser 336: if(data->searching->is_string())
337: matches=data->searching->as_string() == value.as_string();
1.28 parser 338: else
1.38 parser 339: matches=data->searching->as_double() == value.as_double();
1.28 parser 340:
341: if(matches) {
1.82 paf 342: if(data->found)
343: throw Exception("parser.runtime",
344: &method_name,
345: "duplicate found");
346:
1.38 parser 347: data->found=code;
1.28 parser 348: break;
349: }
350: }
351: }
352:
1.63 paf 353: // cache--
354:
355: // consts
356:
1.79 paf 357: const int DATA_STRING_SERIALIZED_VERSION=0x0002;
1.63 paf 358:
359: // helper types
360:
361: #ifndef DOXYGEN
362: struct Data_string_serialized_prolog {
363: int version;
1.79 paf 364: time_t expires;
1.63 paf 365: };
366: #endif
367:
1.68 paf 368: void cache_delete(const String& file_spec) {
369: file_delete(file_spec, false/*fail_on_read_problem*/);
1.63 paf 370: }
1.69 paf 371:
372: #ifndef DOXYGEN
1.79 paf 373: struct Cache_data {
374: time_t expires;
375: };
1.69 paf 376: struct Locked_process_and_cache_put_action_info {
377: Request *r;
1.79 paf 378: Cache_data *data;
1.81 paf 379: Value *body_code; const String *evaluated_body;
1.69 paf 380: };
381: #endif
382: static void locked_process_and_cache_put_action(int f, void *context) {
383: Locked_process_and_cache_put_action_info& info=
384: *static_cast<Locked_process_and_cache_put_action_info *>(context);
385:
386: // body->process
1.81 paf 387: info.evaluated_body=&info.r->process_to_string(*info.body_code);
1.69 paf 388:
1.79 paf 389: // expiration time not spoiled by ^cache(0) or something?
390: if(info.data->expires > time(0)) {
391: // string -serialize> buffer
392: void *data; size_t data_size;
1.81 paf 393: info.evaluated_body->serialize(
1.79 paf 394: sizeof(Data_string_serialized_prolog),
395: data, data_size);
396: Data_string_serialized_prolog& prolog=
397: *static_cast<Data_string_serialized_prolog *>(data);
398: prolog.version=DATA_STRING_SERIALIZED_VERSION;
399: prolog.expires=info.data->expires;
400:
401: // buffer -write> file
402: write(f, data, data_size);
403: } else // expired!
404: info.data->expires=0; // flag it so that could be easily checked by caller
1.69 paf 405: }
1.81 paf 406: const String *locked_process_and_cache_put(Request& r,
1.69 paf 407: Value& body_code,
1.79 paf 408: Cache_data& data,
1.69 paf 409: const String& file_spec) {
410: Locked_process_and_cache_put_action_info info={
411: &r,
1.81 paf 412: &data,
413: &body_code
1.69 paf 414: };
415:
1.81 paf 416: const String *result=file_write_action_under_lock(
1.69 paf 417: file_spec,
418: "cache_put", locked_process_and_cache_put_action, &info,
419: false/*as_text*/,
420: false/*do_append*/,
1.96 paf 421: false/*block*/,
422: false/*fail on lock problem*/) ? info.evaluated_body: 0;
1.100 paf 423: time_t now=time(0);
424: if(data.expires<=now)
1.79 paf 425: cache_delete(file_spec);
426: return result;
1.63 paf 427: }
1.79 paf 428: String *cache_get(Pool& pool, const String& file_spec, time_t now) {
1.63 paf 429: void* data; size_t data_size;
1.72 paf 430: if(file_read(pool, file_spec,
1.63 paf 431: data, data_size,
432: false/*as_text*/,
1.69 paf 433: false/*fail_on_read_problem*/)
1.72 paf 434: && data_size/* ignore reads which are empty due to
435: non-unary open+lockEX conflict with lockSH */) {
1.63 paf 436:
1.72 paf 437: Data_string_serialized_prolog& prolog=
438: *static_cast<Data_string_serialized_prolog *>(data);
1.63 paf 439:
1.72 paf 440: String *result=new(pool) String(pool);
441: if(
442: data_size>=sizeof(Data_string_serialized_prolog)
443: && prolog.version==DATA_STRING_SERIALIZED_VERSION
1.79 paf 444: && prolog.expires > now
1.72 paf 445: && result->deserialize(
446: sizeof(Data_string_serialized_prolog), data, data_size, file_spec.cstr()))
447: return result;
448: }
1.63 paf 449:
1.72 paf 450: return 0;
1.63 paf 451: }
1.79 paf 452: static time_t as_expires(Request& r, const String& method_name, MethodParams *params,
453: int index, time_t now) {
454: time_t result;
455: Value& vlifespan_or_expires=params->get(index);
1.104 paf 456: if(Value *vdate=vlifespan_or_expires.as(VDATE_TYPE, false))
457: result=static_cast<VDate *>(vdate)->get_time();
1.79 paf 458: else
459: result=now+(time_t)params->as_double(index, "lifespan must be date or number", r);
460:
461: return result;
462: }
463: static const String as_file_spec(Request&r, MethodParams *params, int index) {
464: return r.absolute(params->as_string(index, "filespec must be string"));
465: }
1.63 paf 466: static void _cache(Request& r, const String& method_name, MethodParams *params) {
467: Pool& pool=r.pool();
1.79 paf 468: time_t now=time(0);
469:
470: // ^cache[filename] ^cache(seconds) ^cache[expires date]
471: if(params->size()==1) {
472: if(params->get(0).is_string()) { // filename?
473: cache_delete(as_file_spec(r, params, 0));
474: return;
475: }
476:
477: // secods|expires date
478: Cache_data *data=static_cast<Cache_data *>(r.classes_conf.get(*cache_data_name));
479: if(!data)
480: throw Exception("parser.runtime",
481: &method_name,
482: "expire-time reducing instruction without cache");
483:
484: time_t expires=as_expires(r, method_name, params, 0, now);
485: if(expires < data->expires)
486: data->expires=expires;
487:
488: return;
489: }
1.63 paf 490:
491: // file_spec, expires, body code
1.65 paf 492: const String &file_spec=r.absolute(params->as_string(0, "filespec must be string"));
493:
1.79 paf 494: Cache_data data;
495: Temp_hash_value cache_data_setter(r.classes_conf, *cache_data_name, &data);
496: data.expires=as_expires(r, method_name, params, 1, now);
1.63 paf 497: Value& body_code=params->as_junction(2, "body must be code");
498:
1.79 paf 499: if(data.expires>now) { // valid 'expires' specified? try cached copy...
1.69 paf 500: // hence we don't hope to have unary create/lockEX
501: // we need some plan to live in a life like that, so...
502: // worst races plan:
503: // A B
504: // open
505: // |open
506: // lockSH
507: // |nonblocking-lockEX fails
508: // unlockSH
509: // close, cache_get returns 0
510: // open
511: // nonblocking-lockEX succeeds; process, write, close
512: // |retry1: open
513: // ...
514: // |lockSH succeeds; ...
515:
516: for(int retry=0; retry<2; retry++) {
1.79 paf 517: if(String *cached_body=cache_get(pool, file_spec, now)) { // have cached copy?
518: // write it out
519: r.write_assign_lang(*cached_body);
520: // happy with it
521: return;
522: }
1.69 paf 523:
524: // non-blocked lock; process; cache it
1.81 paf 525: if(const String*processed_body=
526: locked_process_and_cache_put(r, body_code, data, file_spec)) {
1.63 paf 527: // write it out
1.69 paf 528: r.write_assign_lang(*processed_body);
1.63 paf 529: // happy with it
530: return;
1.69 paf 531: } else { // somebody writing result right now
532: pa_sleep(0, 500000); // waiting half a second
533: retry=0; // prolonging our wait, than could cache_get it, without processing body_code
1.63 paf 534: }
1.69 paf 535: }
1.78 paf 536: throw Exception(0,
1.69 paf 537: &file_spec,
538: "locking problem");
539: } else {
1.79 paf 540: // instructed not to cache; forget cached copy
1.68 paf 541: cache_delete(file_spec);
1.69 paf 542: // process
1.81 paf 543: const String& processed_body=r.process_to_string(body_code);
1.69 paf 544: // write it out
545: r.write_assign_lang(processed_body);
546: // happy with it
547: return;
548: }
549: // never reached
1.63 paf 550: }
551:
1.74 paf 552: // also used in pa_request.C to pass param to @unhandled_exception
553: VHash& exception2vhash(Pool& pool, const Exception& e) {
554: VHash& result=*new(pool) VHash(pool);
555: Hash& hash=result.hash(0);
1.94 paf 556: if(const char *type=e.type(true))
1.78 paf 557: hash.put(*exception_type_part_name, new(pool) VString(*new(pool) String(pool, type)));
1.76 paf 558: if(const String *asource=e.problem_source()) {
559: String& source=*new(pool) String(pool);
560: source.append(*asource, String::UL_TAINTED, true/*forced*/);
1.74 paf 561:
1.76 paf 562: hash.put(*exception_source_part_name, new(pool) VString(source));
1.74 paf 563: #ifndef NO_STRING_ORIGIN
1.76 paf 564: const Origin& origin=source.origin();
1.89 paf 565: hash.put(*new(pool) String(pool, "file", 0, true),
1.74 paf 566: new(pool) VString(*new(pool) String(pool, origin.file)));
567: hash.put(*new(pool) String(pool, "lineno"),
568: new(pool) VInt(pool, 1+origin.line));
569: #endif
570: }
1.94 paf 571: if(const char *ecomment=e.comment(true)) {
1.74 paf 572: int comment_size=strlen(ecomment);
573: char *pcomment=(char *)pool.malloc(comment_size);
574: memcpy(pcomment, ecomment, comment_size);
575: hash.put(*exception_comment_part_name,
1.76 paf 576: new(pool) VString(*new(pool) String(pool, pcomment, comment_size, true/*tainted*/)));
1.74 paf 577: }
578: hash.put(*exception_handled_part_name,
579: new(pool) VBool(pool, false));
580:
581: return result;
582: }
583:
584: static void _try_operator(Request& r, const String& method_name, MethodParams *params) {
585: Pool& pool=r.pool();
586:
587: Value& body_code=params->as_junction(0, "body_code must be code");
588: Value& catch_code=params->as_junction(1, "catch_code must be code");
589:
1.86 paf 590: StringOrValue result;
1.74 paf 591: try {
1.112 paf 592: Request_context_saver context_saved(r); // taking snapshot of request processing status, restoring it at }
1.86 paf 593: result=r.process(body_code);
1.112 paf 594: context_saved.restore(); // manually restoring context
1.74 paf 595: } catch(const Exception& e) {
596: VHash& vhash=exception2vhash(pool, e);
597:
598: Junction *junction=catch_code.get_junction();
1.105 paf 599: Value *method_frame=junction->method_frame;
600: Value *saved_exception_var_value=method_frame->get_element(*exception_var_name, method_frame, false);
601: junction->method_frame->put_element(*exception_var_name, &vhash, false);
1.86 paf 602: result=r.process(catch_code);
1.74 paf 603: bool handled=false;
604: if(Value *value=static_cast<Value *>(vhash.hash(0).get(*exception_handled_part_name)))
605: handled=value->as_bool();
1.105 paf 606: junction->method_frame->put_element(*exception_var_name, saved_exception_var_value, false);
1.74 paf 607:
608: if(!handled)
609: throw(e); // rethrow
610: }
611: // write it out
1.86 paf 612: r.write_pass_lang(result);
1.74 paf 613: }
614:
615: static void _throw_operator(Request& r, const String& method_name, MethodParams *params) {
616: Pool& pool=r.pool();
617:
618: if(params->size()==1) {
619: Value& param0=params->get(0);
620: if(Hash *hash=param0.get_hash(&method_name)) {
1.78 paf 621: const char *type=0;
1.74 paf 622: if(Value *value=static_cast<Value *>(hash->get(*exception_type_part_name)))
1.78 paf 623: type=value->as_string().cstr();
1.74 paf 624: const String *source=0;
625: if(Value *value=static_cast<Value *>(hash->get(*exception_source_part_name)))
626: source=&value->as_string();
627: const char *comment=0;
628: if(Value *value=
629: static_cast<Value *>(hash->get(*exception_comment_part_name)))
630: comment=value->as_string().cstr();
631:
1.78 paf 632: throw Exception(type,
1.74 paf 633: source?source:&method_name,
634: comment);
635: } else
1.78 paf 636: throw Exception("parser.runtime",
1.74 paf 637: &method_name,
638: "one-param version has hash param");
639: } else {
1.78 paf 640: const char *type=params->as_string(0, "type must be string").cstr();
1.74 paf 641: const String& source=params->as_string(1, "source must be string");
1.92 paf 642: const char *comment=params->size()>2?params->as_string(2, "comment must be string").cstr():0;
1.97 paf 643: throw Exception(type, &source, "%s", comment?comment:"");
1.74 paf 644: }
645: }
646:
1.10 paf 647: // constructor
648:
1.113 paf 649: VClassMAIN::VClassMAIN(Pool& apool): VClass(apool) {
1.1 paf 650: // ^if(condition){code-when-true}
651: // ^if(condition){code-when-true}{code-when-false}
1.10 paf 652: add_native_method("if", Method::CT_ANY, _if, 2, 3);
1.1 paf 653:
654: // ^untaint[as-is|uri|sql|js|html|html-typo]{code}
1.59 paf 655: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2);
1.1 paf 656:
657: // ^taint[as-is|uri|sql|js|html|html-typo]{code}
1.10 paf 658: add_native_method("taint", Method::CT_ANY, _taint, 1, 2);
1.1 paf 659:
660: // ^process[code]
1.116 paf 661: add_native_method("process", Method::CT_ANY, _process, 1, 2);
1.1 paf 662:
663: // ^rem{code}
1.51 parser 664: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000);
1.1 paf 665:
666: // ^while(condition){code}
1.10 paf 667: add_native_method("while", Method::CT_ANY, _while, 2, 2);
1.1 paf 668:
669: // ^use[file]
1.10 paf 670: add_native_method("use", Method::CT_ANY, _use, 1, 1);
1.1 paf 671:
1.54 paf 672: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.10 paf 673: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1);
1.1 paf 674:
675: // ^eval(expr)
676: // ^eval(expr)[format]
1.10 paf 677: add_native_method("eval", Method::CT_ANY, _eval, 1, 2);
1.52 parser 678:
1.1 paf 679: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 680: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
681:
1.63 paf 682:
1.65 paf 683: // ^cache[file_spec] delete cache
1.63 paf 684: // ^cache[file_spec](time){code} time=0 no cache
1.65 paf 685: add_native_method("cache", Method::CT_ANY, _cache, 1, 3);
1.63 paf 686:
1.28 parser 687: // switch
688:
689: // ^switch[value]{cases}
690: add_native_method("switch", Method::CT_ANY, _switch, 2, 2);
691:
692: // ^case[value]{code}
1.51 parser 693: add_native_method("case", Method::CT_ANY, _case, 2, 10000);
1.74 paf 694:
695: // try-catch
696:
697: // ^try{code}{catch code}
698: add_native_method("try", Method::CT_ANY, _try_operator, 2, 2);
699: // ^throw[$exception hash]
700: // ^throw[type;source;comment]
701: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
702:
1.10 paf 703: }
1.11 paf 704:
705: // constructor & configurator
1.1 paf 706:
1.113 paf 707: VClass& VClassMAIN_create(Pool& pool) {
708: return *new(pool) VClassMAIN(pool);
1.1 paf 709: }
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