Annotation of parser3/src/classes/op.C, revision 1.109
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:
1.109 ! paf 8: static const char* IDENT_OP_C="$Date: 2002/09/17 08:44:44 $";
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:
28: class MOP : public Methoded {
29: public:
30: MOP(Pool& pool);
1.11 paf 31: public: // Methoded
1.10 paf 32: bool used_directly() { return true; }
1.11 paf 33: void configure_user(Request& r);
1.36 parser 34:
1.11 paf 35: private:
36: String main_sql_name;
37: String main_sql_drivers_name;
1.10 paf 38: };
39:
40: // methods
41:
1.5 paf 42: static void _if(Request& r, const String&, MethodParams *params) {
1.48 parser 43: Value& condition_code=params->as_junction(0, "condition must be expression");
1.1 paf 44:
1.81 paf 45: bool condition=r.process_to_value(condition_code,
1.83 paf 46: /*0/*no name* /,*/
1.1 paf 47: false/*don't intercept string*/).as_bool();
1.6 paf 48: if(condition)
1.85 paf 49: r.write_pass_lang(r.process(params->as_junction(1, "'then' parameter must be code")));
1.50 parser 50: else if(params->size()>2)
1.85 paf 51: r.write_pass_lang(r.process(params->as_junction(2, "'else' parameter must be code")));
1.1 paf 52: }
53:
1.5 paf 54: static void _untaint(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 55: Pool& pool=r.pool();
56:
1.60 paf 57: uchar lang;
1.59 paf 58: if(params->size()==1)
59: lang=String::UL_AS_IS; // mark as simply 'tainted'. useful in html from sql
60: else {
61: const String& lang_name=params->as_string(0, "lang must be string");
1.60 paf 62: lang=untaint_lang_name2enum->get_int(lang_name);
1.59 paf 63: if(!lang)
1.78 paf 64: throw Exception(0,
1.59 paf 65: &lang_name,
66: "invalid taint language");
67: }
1.1 paf 68:
69: {
1.59 paf 70: Value& vbody=params->as_junction(params->size()-1, "body must be code");
1.1 paf 71:
72: Temp_lang temp_lang(r, lang); // set temporarily specified ^untaint[language;
1.86 paf 73: r.write_pass_lang(r.process(vbody)); // process marking tainted with that lang
1.1 paf 74: }
75: }
76:
1.5 paf 77: static void _taint(Request& r, const String&, MethodParams *params) {
1.1 paf 78: Pool& pool=r.pool();
79:
1.60 paf 80: uchar lang;
1.1 paf 81: if(params->size()==1)
82: lang=String::UL_TAINTED; // mark as simply 'tainted'. useful in table:set
83: else {
1.48 parser 84: const String& lang_name=params->as_string(0, "lang must be string");
1.60 paf 85: lang=untaint_lang_name2enum->get_int(lang_name);
1.1 paf 86: if(!lang)
1.78 paf 87: throw Exception(0,
1.3 paf 88: &lang_name,
89: "invalid taint language");
1.1 paf 90: }
91:
92: {
1.34 parser 93: Value& vbody=params->as_no_junction(params->size()-1, "body must not be code");
1.1 paf 94:
1.90 paf 95: String& result=*new(pool) String(pool);
1.1 paf 96: result.append(
97: vbody.as_string(), // process marking tainted with that lang
98: lang, true); // force result language to specified
99: r.write_pass_lang(result);
100: }
101: }
102:
1.5 paf 103: static void _process(Request& r, const String& method_name, MethodParams *params) {
1.97 paf 104: Pool& pool=r.pool();
1.109 ! paf 105: VStateless_class *self_class=r.self->get_class();
! 106: if(!self_class)
! 107: self_class=new(pool) VStateless_class(pool); // methods storage in case of self abscence
1.73 paf 108: const Method *main_method;
1.1 paf 109: {
1.73 paf 110: // temporary remove language change
111: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
1.1 paf 112: // temporary zero @main so to maybe-replace it in processed code
1.109 ! paf 113: Temp_method temp_method_main(*self_class, r.main_method_name, 0);
1.1 paf 114: // temporary zero @auto so it wouldn't be auto-called in Request::use_buf
1.109 ! paf 115: Temp_method temp_method_auto(*self_class, *auto_method_name, 0);
1.1 paf 116:
117: // evaluate source to process
1.86 paf 118: const String& source=r.process_to_string(params->as_junction(0, "body must be code"));
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
1.67 paf 142: r.use_buf(
143: source.cstr(String::UL_UNSPECIFIED, r.connection(0)),
1.97 paf 144: *new(pool) String(pool, heap_place, place_size, true /*tainted*/),
1.88 paf 145: heap_place,
1.109 ! paf 146: self_class);
1.1 paf 147:
1.73 paf 148: // main_method
1.109 ! paf 149: main_method=self_class->get_method(r.main_method_name);
1.73 paf 150: }
151: // after restoring current-request-lang
152: // maybe-execute @main[]
153: if(main_method) {
154: // execute!
155: r.execute(*main_method->parser_code);
1.1 paf 156: }
157: }
158:
1.5 paf 159: static void _rem(Request& r, const String&, MethodParams *params) {
1.34 parser 160: params->as_junction(0, "body must be code");
1.1 paf 161: }
162:
1.5 paf 163: static void _while(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 164: Pool& pool=r.pool();
165:
1.34 parser 166: Value& vcondition=params->as_junction(0, "condition must be expression");
167: Value& body=params->as_junction(1, "body must be code");
1.1 paf 168:
169: // while...
170: int endless_loop_count=0;
171: while(true) {
1.18 parser 172: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
1.78 paf 173: throw Exception("parser.runtime",
1.1 paf 174: &method_name,
175: "endless loop detected");
176:
1.86 paf 177: bool condition=r.process_to_value(vcondition,
1.83 paf 178: /*0/*no name* /,*/
1.1 paf 179: false/*don't intercept string*/).as_bool();
180: if(!condition) // ...condition is true
181: break;
182:
183: // write processed body
1.86 paf 184: r.write_pass_lang(r.process(body));
1.1 paf 185: }
186: }
187:
1.5 paf 188: static void _use(Request& r, const String& method_name, MethodParams *params) {
1.34 parser 189: Value& vfile=params->as_no_junction(0, "file name must not be code");
1.37 parser 190: r.use_file(vfile.as_string());
1.1 paf 191: }
192:
1.5 paf 193: static void _for(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 194: Pool& pool=r.pool();
1.48 parser 195: const String& var_name=params->as_string(0, "var name must be string");
196: int from=params->as_int(1, "from must be int", r);
197: int to=params->as_int(2, "to must be int", r);
1.34 parser 198: Value& body_code=params->as_junction(3, "body must be code");
1.50 parser 199: Value *delim_maybe_code=params->size()>4?¶ms->get(4):0;
1.1 paf 200:
1.57 paf 201: if(to-from>=MAX_LOOPS) // too long loop?
1.78 paf 202: throw Exception("parser.runtime",
1.57 paf 203: &method_name,
204: "endless loop detected");
205:
1.1 paf 206: bool need_delim=false;
207: VInt *vint=new(pool) VInt(pool, 0);
1.105 paf 208: r.method_frame->put_element(var_name, vint, false);
1.1 paf 209: for(int i=from; i<=to; i++) {
210: vint->set_int(i);
211:
1.108 paf 212: StringOrValue sv_processed=r.process(body_code);
213: const String *s_processed=sv_processed.get_string();
214: if(delim_maybe_code && s_processed && s_processed->size()) { // delimiter set and we have body
215: if(need_delim) // need delim & iteration produced string?
1.86 paf 216: r.write_pass_lang(r.process(*delim_maybe_code));
1.1 paf 217: need_delim=true;
218: }
1.108 paf 219: r.write_pass_lang(sv_processed);
1.1 paf 220: }
221: }
222:
1.15 paf 223: static void _eval(Request& r, const String& method_name, MethodParams *params) {
1.34 parser 224: Value& expr=params->as_junction(0, "need expression");
1.1 paf 225: // evaluate expresion
1.91 paf 226: Value *value_result=r.process_to_value(expr,
1.83 paf 227: /*0/*no name YET* /,*/
1.1 paf 228: true/*don't intercept string*/).as_expr_result();
1.50 parser 229: if(params->size()>1) {
1.34 parser 230: Value& fmt=params->as_no_junction(1, "fmt must not be code");
1.1 paf 231:
232: Pool& pool=r.pool();
233: String& string=*new(pool) String(pool);
1.91 paf 234: string.APPEND_CONST(format(pool, value_result->as_double(), fmt.as_string().cstr()));
235: r.write_no_lang(string);
236: } else
237: r.write_no_lang(*value_result);
1.1 paf 238: }
239:
1.42 parser 240: static void _connect(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 241: Pool& pool=r.pool();
1.63 paf 242: #ifdef RESOURCES_DEBUG
243: struct timeval mt[2];
244: #endif
1.34 parser 245: Value& url=params->as_no_junction(0, "url must not be code");
246: Value& body_code=params->as_junction(1, "body must be code");
1.1 paf 247:
1.19 parser 248: Table *protocol2driver_and_client=
1.35 parser 249: static_cast<Table *>(r.classes_conf.get(r.OP.name()));
1.11 paf 250:
1.63 paf 251: #ifdef RESOURCES_DEBUG
252: //measure:before
253: gettimeofday(&mt[0],NULL);
254: #endif
1.1 paf 255: // connect
1.67 paf 256: SQL_Connection_ptr connection=SQL_driver_manager->get_connection(
1.42 parser 257: url.as_string(), method_name, protocol2driver_and_client);
1.1 paf 258:
1.63 paf 259: #ifdef RESOURCES_DEBUG
260: //measure:after connect
261: gettimeofday(&mt[1],NULL);
262:
263: double t[2];
264: for(int i=0;i<2;i++)
265: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
266:
267: r.sql_connect_time+=t[1]-t[0];
268: #endif
1.67 paf 269: Temp_connection temp_connection(r, connection.get());
1.1 paf 270: // execute body
1.53 parser 271: try {
1.86 paf 272: r.write_assign_lang(r.process(body_code));
1.75 paf 273: } catch(...) { // process problem
1.67 paf 274: connection->mark_to_rollback();
275: /*re*/throw;
1.1 paf 276: }
277: }
278:
1.41 parser 279: #ifndef DOXYGEN
1.28 parser 280: struct Switch_data {
1.82 paf 281: Request *r;
1.28 parser 282: Value *searching;
283: Value *found;
284: Value *_default;
285: };
1.41 parser 286: #endif
1.28 parser 287: static void _switch(Request& r, const String&, MethodParams *params) {
1.82 paf 288: Switch_data data={&r, &r.process_to_value(params->get(0))};
1.79 paf 289: Temp_hash_value switch_data_setter(r.classes_conf, *switch_data_name, &data);
1.28 parser 290:
1.83 paf 291: Value& cases_code=params->as_junction(1, "switch cases must be code");
1.82 paf 292: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
293: // because of stacked WWrapper used there as wcontext
1.84 paf 294: r.process(cases_code, true/*intercept_string*/);
1.83 paf 295: if(Value *selected_code=data.found ? data.found : data._default) {
296: // setting code context, would execute in ^switch[...]{>>context<<}
1.105 paf 297: //selected_code->get_junction()->change_context(cases_code.get_junction());
1.107 paf 298: r.write_pass_lang(r.process(*selected_code));
1.83 paf 299: }
1.28 parser 300: }
301:
1.38 parser 302: static void _case(Request& r, const String& method_name, MethodParams *params) {
303: Pool& pool=r.pool();
304:
305: Switch_data *data=static_cast<Switch_data *>(r.classes_conf.get(*switch_data_name));
306: if(!data)
1.78 paf 307: throw Exception("parser.runtime",
1.38 parser 308: &method_name,
309: "without switch");
1.28 parser 310:
311: int count=params->size();
1.34 parser 312: Value *code=¶ms->as_junction(--count, "case result must be code");
1.83 paf 313:
314: // killing context for safety, would execute in ^switch[...]{>>context<<}
315: // reason: context is stacked, and it would become invalid afterwards
1.105 paf 316: //code->get_junction()->change_context(0);
1.83 paf 317:
1.28 parser 318: for(int i=0; i<count; i++) {
1.81 paf 319: Value& value=r.process_to_value(params->get(i));
1.28 parser 320:
1.82 paf 321: if(value.as_string() == CASE_DEFAULT_VALUE) {
1.38 parser 322: data->_default=code;
1.28 parser 323: break;
324: }
325:
326: bool matches;
1.38 parser 327: if(data->searching->is_string())
328: matches=data->searching->as_string() == value.as_string();
1.28 parser 329: else
1.38 parser 330: matches=data->searching->as_double() == value.as_double();
1.28 parser 331:
332: if(matches) {
1.82 paf 333: if(data->found)
334: throw Exception("parser.runtime",
335: &method_name,
336: "duplicate found");
337:
1.38 parser 338: data->found=code;
1.28 parser 339: break;
340: }
341: }
342: }
343:
1.63 paf 344: // cache--
345:
346: // consts
347:
1.79 paf 348: const int DATA_STRING_SERIALIZED_VERSION=0x0002;
1.63 paf 349:
350: // helper types
351:
352: #ifndef DOXYGEN
353: struct Data_string_serialized_prolog {
354: int version;
1.79 paf 355: time_t expires;
1.63 paf 356: };
357: #endif
358:
1.68 paf 359: void cache_delete(const String& file_spec) {
360: file_delete(file_spec, false/*fail_on_read_problem*/);
1.63 paf 361: }
1.69 paf 362:
363: #ifndef DOXYGEN
1.79 paf 364: struct Cache_data {
365: time_t expires;
366: };
1.69 paf 367: struct Locked_process_and_cache_put_action_info {
368: Request *r;
1.79 paf 369: Cache_data *data;
1.81 paf 370: Value *body_code; const String *evaluated_body;
1.69 paf 371: };
372: #endif
373: static void locked_process_and_cache_put_action(int f, void *context) {
374: Locked_process_and_cache_put_action_info& info=
375: *static_cast<Locked_process_and_cache_put_action_info *>(context);
376:
377: // body->process
1.81 paf 378: info.evaluated_body=&info.r->process_to_string(*info.body_code);
1.69 paf 379:
1.79 paf 380: // expiration time not spoiled by ^cache(0) or something?
381: if(info.data->expires > time(0)) {
382: // string -serialize> buffer
383: void *data; size_t data_size;
1.81 paf 384: info.evaluated_body->serialize(
1.79 paf 385: sizeof(Data_string_serialized_prolog),
386: data, data_size);
387: Data_string_serialized_prolog& prolog=
388: *static_cast<Data_string_serialized_prolog *>(data);
389: prolog.version=DATA_STRING_SERIALIZED_VERSION;
390: prolog.expires=info.data->expires;
391:
392: // buffer -write> file
393: write(f, data, data_size);
394: } else // expired!
395: info.data->expires=0; // flag it so that could be easily checked by caller
1.69 paf 396: }
1.81 paf 397: const String *locked_process_and_cache_put(Request& r,
1.69 paf 398: Value& body_code,
1.79 paf 399: Cache_data& data,
1.69 paf 400: const String& file_spec) {
401: Locked_process_and_cache_put_action_info info={
402: &r,
1.81 paf 403: &data,
404: &body_code
1.69 paf 405: };
406:
1.81 paf 407: const String *result=file_write_action_under_lock(
1.69 paf 408: file_spec,
409: "cache_put", locked_process_and_cache_put_action, &info,
410: false/*as_text*/,
411: false/*do_append*/,
1.96 paf 412: false/*block*/,
413: false/*fail on lock problem*/) ? info.evaluated_body: 0;
1.100 paf 414: time_t now=time(0);
415: if(data.expires<=now)
1.79 paf 416: cache_delete(file_spec);
417: return result;
1.63 paf 418: }
1.79 paf 419: String *cache_get(Pool& pool, const String& file_spec, time_t now) {
1.63 paf 420: void* data; size_t data_size;
1.72 paf 421: if(file_read(pool, file_spec,
1.63 paf 422: data, data_size,
423: false/*as_text*/,
1.69 paf 424: false/*fail_on_read_problem*/)
1.72 paf 425: && data_size/* ignore reads which are empty due to
426: non-unary open+lockEX conflict with lockSH */) {
1.63 paf 427:
1.72 paf 428: Data_string_serialized_prolog& prolog=
429: *static_cast<Data_string_serialized_prolog *>(data);
1.63 paf 430:
1.72 paf 431: String *result=new(pool) String(pool);
432: if(
433: data_size>=sizeof(Data_string_serialized_prolog)
434: && prolog.version==DATA_STRING_SERIALIZED_VERSION
1.79 paf 435: && prolog.expires > now
1.72 paf 436: && result->deserialize(
437: sizeof(Data_string_serialized_prolog), data, data_size, file_spec.cstr()))
438: return result;
439: }
1.63 paf 440:
1.72 paf 441: return 0;
1.63 paf 442: }
1.79 paf 443: static time_t as_expires(Request& r, const String& method_name, MethodParams *params,
444: int index, time_t now) {
445: time_t result;
446: Value& vlifespan_or_expires=params->get(index);
1.104 paf 447: if(Value *vdate=vlifespan_or_expires.as(VDATE_TYPE, false))
448: result=static_cast<VDate *>(vdate)->get_time();
1.79 paf 449: else
450: result=now+(time_t)params->as_double(index, "lifespan must be date or number", r);
451:
452: return result;
453: }
454: static const String as_file_spec(Request&r, MethodParams *params, int index) {
455: return r.absolute(params->as_string(index, "filespec must be string"));
456: }
1.63 paf 457: static void _cache(Request& r, const String& method_name, MethodParams *params) {
458: Pool& pool=r.pool();
1.79 paf 459: time_t now=time(0);
460:
461: // ^cache[filename] ^cache(seconds) ^cache[expires date]
462: if(params->size()==1) {
463: if(params->get(0).is_string()) { // filename?
464: cache_delete(as_file_spec(r, params, 0));
465: return;
466: }
467:
468: // secods|expires date
469: Cache_data *data=static_cast<Cache_data *>(r.classes_conf.get(*cache_data_name));
470: if(!data)
471: throw Exception("parser.runtime",
472: &method_name,
473: "expire-time reducing instruction without cache");
474:
475: time_t expires=as_expires(r, method_name, params, 0, now);
476: if(expires < data->expires)
477: data->expires=expires;
478:
479: return;
480: }
1.63 paf 481:
482: // file_spec, expires, body code
1.65 paf 483: const String &file_spec=r.absolute(params->as_string(0, "filespec must be string"));
484:
1.79 paf 485: Cache_data data;
486: Temp_hash_value cache_data_setter(r.classes_conf, *cache_data_name, &data);
487: data.expires=as_expires(r, method_name, params, 1, now);
1.63 paf 488: Value& body_code=params->as_junction(2, "body must be code");
489:
1.79 paf 490: if(data.expires>now) { // valid 'expires' specified? try cached copy...
1.69 paf 491: // hence we don't hope to have unary create/lockEX
492: // we need some plan to live in a life like that, so...
493: // worst races plan:
494: // A B
495: // open
496: // |open
497: // lockSH
498: // |nonblocking-lockEX fails
499: // unlockSH
500: // close, cache_get returns 0
501: // open
502: // nonblocking-lockEX succeeds; process, write, close
503: // |retry1: open
504: // ...
505: // |lockSH succeeds; ...
506:
507: for(int retry=0; retry<2; retry++) {
1.79 paf 508: if(String *cached_body=cache_get(pool, file_spec, now)) { // have cached copy?
509: // write it out
510: r.write_assign_lang(*cached_body);
511: // happy with it
512: return;
513: }
1.69 paf 514:
515: // non-blocked lock; process; cache it
1.81 paf 516: if(const String*processed_body=
517: locked_process_and_cache_put(r, body_code, data, file_spec)) {
1.63 paf 518: // write it out
1.69 paf 519: r.write_assign_lang(*processed_body);
1.63 paf 520: // happy with it
521: return;
1.69 paf 522: } else { // somebody writing result right now
523: pa_sleep(0, 500000); // waiting half a second
524: retry=0; // prolonging our wait, than could cache_get it, without processing body_code
1.63 paf 525: }
1.69 paf 526: }
1.78 paf 527: throw Exception(0,
1.69 paf 528: &file_spec,
529: "locking problem");
530: } else {
1.79 paf 531: // instructed not to cache; forget cached copy
1.68 paf 532: cache_delete(file_spec);
1.69 paf 533: // process
1.81 paf 534: const String& processed_body=r.process_to_string(body_code);
1.69 paf 535: // write it out
536: r.write_assign_lang(processed_body);
537: // happy with it
538: return;
539: }
540: // never reached
1.63 paf 541: }
542:
1.74 paf 543: // also used in pa_request.C to pass param to @unhandled_exception
544: VHash& exception2vhash(Pool& pool, const Exception& e) {
545: VHash& result=*new(pool) VHash(pool);
546: Hash& hash=result.hash(0);
1.94 paf 547: if(const char *type=e.type(true))
1.78 paf 548: hash.put(*exception_type_part_name, new(pool) VString(*new(pool) String(pool, type)));
1.76 paf 549: if(const String *asource=e.problem_source()) {
550: String& source=*new(pool) String(pool);
551: source.append(*asource, String::UL_TAINTED, true/*forced*/);
1.74 paf 552:
1.76 paf 553: hash.put(*exception_source_part_name, new(pool) VString(source));
1.74 paf 554: #ifndef NO_STRING_ORIGIN
1.76 paf 555: const Origin& origin=source.origin();
1.89 paf 556: hash.put(*new(pool) String(pool, "file", 0, true),
1.74 paf 557: new(pool) VString(*new(pool) String(pool, origin.file)));
558: hash.put(*new(pool) String(pool, "lineno"),
559: new(pool) VInt(pool, 1+origin.line));
560: #endif
561: }
1.94 paf 562: if(const char *ecomment=e.comment(true)) {
1.74 paf 563: int comment_size=strlen(ecomment);
564: char *pcomment=(char *)pool.malloc(comment_size);
565: memcpy(pcomment, ecomment, comment_size);
566: hash.put(*exception_comment_part_name,
1.76 paf 567: new(pool) VString(*new(pool) String(pool, pcomment, comment_size, true/*tainted*/)));
1.74 paf 568: }
569: hash.put(*exception_handled_part_name,
570: new(pool) VBool(pool, false));
571:
572: return result;
573: }
574:
575: static void _try_operator(Request& r, const String& method_name, MethodParams *params) {
576: Pool& pool=r.pool();
577:
578: Value& body_code=params->as_junction(0, "body_code must be code");
579: Value& catch_code=params->as_junction(1, "catch_code must be code");
580:
1.86 paf 581: StringOrValue result;
1.74 paf 582:
583: // taking snapshot of request processing status
1.77 paf 584: //int ssexception_trace=r.exception_trace.top_index();
585: int sstack=r.stack.top_index();
1.105 paf 586: Value *sself=r.self;
587: VMethodFrame *smethod_frame=r.method_frame;
588: Value *srcontext=r.rcontext;
1.74 paf 589: WContext *swcontext=r.wcontext;
590: try {
1.86 paf 591: result=r.process(body_code);
1.74 paf 592: } catch(const Exception& e) {
593: // restoring request processing status
1.77 paf 594: //r.exception_trace.top_index(ssexception_trace);
595: r.stack.top_index(sstack);
1.105 paf 596: r.self=sself; r.method_frame=smethod_frame, r.rcontext=srcontext; r.wcontext=swcontext;
1.77 paf 597:
1.74 paf 598:
599: VHash& vhash=exception2vhash(pool, e);
600:
601: Junction *junction=catch_code.get_junction();
1.105 paf 602: Value *method_frame=junction->method_frame;
603: Value *saved_exception_var_value=method_frame->get_element(*exception_var_name, method_frame, false);
604: junction->method_frame->put_element(*exception_var_name, &vhash, false);
1.86 paf 605: result=r.process(catch_code);
1.74 paf 606: bool handled=false;
607: if(Value *value=static_cast<Value *>(vhash.hash(0).get(*exception_handled_part_name)))
608: handled=value->as_bool();
1.105 paf 609: junction->method_frame->put_element(*exception_var_name, saved_exception_var_value, false);
1.74 paf 610:
611: if(!handled)
612: throw(e); // rethrow
613: }
614: // write it out
1.86 paf 615: r.write_pass_lang(result);
1.74 paf 616: }
617:
618: static void _throw_operator(Request& r, const String& method_name, MethodParams *params) {
619: Pool& pool=r.pool();
620:
621: if(params->size()==1) {
622: Value& param0=params->get(0);
623: if(Hash *hash=param0.get_hash(&method_name)) {
1.78 paf 624: const char *type=0;
1.74 paf 625: if(Value *value=static_cast<Value *>(hash->get(*exception_type_part_name)))
1.78 paf 626: type=value->as_string().cstr();
1.74 paf 627: const String *source=0;
628: if(Value *value=static_cast<Value *>(hash->get(*exception_source_part_name)))
629: source=&value->as_string();
630: const char *comment=0;
631: if(Value *value=
632: static_cast<Value *>(hash->get(*exception_comment_part_name)))
633: comment=value->as_string().cstr();
634:
1.78 paf 635: throw Exception(type,
1.74 paf 636: source?source:&method_name,
637: comment);
638: } else
1.78 paf 639: throw Exception("parser.runtime",
1.74 paf 640: &method_name,
641: "one-param version has hash param");
642: } else {
1.78 paf 643: const char *type=params->as_string(0, "type must be string").cstr();
1.74 paf 644: const String& source=params->as_string(1, "source must be string");
1.92 paf 645: const char *comment=params->size()>2?params->as_string(2, "comment must be string").cstr():0;
1.97 paf 646: throw Exception(type, &source, "%s", comment?comment:"");
1.74 paf 647: }
648: }
649:
1.10 paf 650: // constructor
651:
1.91 paf 652: MOP::MOP(Pool& apool) : Methoded(apool, "OP"),
1.11 paf 653: main_sql_name(apool, MAIN_SQL_NAME),
654: main_sql_drivers_name(apool, MAIN_SQL_DRIVERS_NAME)
655: {
1.1 paf 656: // ^if(condition){code-when-true}
657: // ^if(condition){code-when-true}{code-when-false}
1.10 paf 658: add_native_method("if", Method::CT_ANY, _if, 2, 3);
1.1 paf 659:
660: // ^untaint[as-is|uri|sql|js|html|html-typo]{code}
1.59 paf 661: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2);
1.1 paf 662:
663: // ^taint[as-is|uri|sql|js|html|html-typo]{code}
1.10 paf 664: add_native_method("taint", Method::CT_ANY, _taint, 1, 2);
1.1 paf 665:
666: // ^process[code]
1.10 paf 667: add_native_method("process", Method::CT_ANY, _process, 1, 1);
1.1 paf 668:
669: // ^rem{code}
1.51 parser 670: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000);
1.1 paf 671:
672: // ^while(condition){code}
1.10 paf 673: add_native_method("while", Method::CT_ANY, _while, 2, 2);
1.1 paf 674:
675: // ^use[file]
1.10 paf 676: add_native_method("use", Method::CT_ANY, _use, 1, 1);
1.1 paf 677:
1.54 paf 678: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.10 paf 679: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1);
1.1 paf 680:
681: // ^eval(expr)
682: // ^eval(expr)[format]
1.10 paf 683: add_native_method("eval", Method::CT_ANY, _eval, 1, 2);
1.52 parser 684:
1.1 paf 685: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 686: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
687:
1.63 paf 688:
1.65 paf 689: // ^cache[file_spec] delete cache
1.63 paf 690: // ^cache[file_spec](time){code} time=0 no cache
1.65 paf 691: add_native_method("cache", Method::CT_ANY, _cache, 1, 3);
1.63 paf 692:
1.28 parser 693: // switch
694:
695: // ^switch[value]{cases}
696: add_native_method("switch", Method::CT_ANY, _switch, 2, 2);
697:
698: // ^case[value]{code}
1.51 parser 699: add_native_method("case", Method::CT_ANY, _case, 2, 10000);
1.74 paf 700:
701: // try-catch
702:
703: // ^try{code}{catch code}
704: add_native_method("try", Method::CT_ANY, _try_operator, 2, 2);
705: // ^throw[$exception hash]
706: // ^throw[type;source;comment]
707: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
708:
1.10 paf 709: }
1.11 paf 710:
711: // constructor & configurator
1.1 paf 712:
1.10 paf 713: Methoded *MOP_create(Pool& pool) {
1.35 parser 714: return new(pool) MOP(pool);
1.11 paf 715: }
716:
717: void MOP::configure_user(Request& r) {
718: Pool& pool=r.pool();
719:
720: // $MAIN:SQL.drivers
1.103 paf 721: if(Value *sql=r.main_class->get_element(main_sql_name, r.main_class, false))
722: if(Value *element=sql->get_element(main_sql_drivers_name, sql, false))
1.11 paf 723: if(Table *protocol2library=element->get_table())
724: r.classes_conf.put(name(), protocol2library);
1.1 paf 725: }
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