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