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