Annotation of parser3/src/classes/op.C, revision 1.94
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)
1.1 paf 6:
1.94 ! paf 7: $Id: op.C,v 1.93 2002/04/19 08:54:35 paf Exp $
1.1 paf 8: */
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"
1.1 paf 16:
1.18 parser 17: // limits
18:
19: #define MAX_LOOPS 10000
20:
1.10 paf 21: // defines
22:
1.82 paf 23: #define CASE_DEFAULT_VALUE "DEFAULT"
1.11 paf 24:
1.10 paf 25: // class
26:
27: class MOP : public Methoded {
28: public:
29: MOP(Pool& pool);
1.11 paf 30: public: // Methoded
1.10 paf 31: bool used_directly() { return true; }
1.11 paf 32: void configure_user(Request& r);
1.36 parser 33:
1.11 paf 34: private:
35: String main_sql_name;
36: String main_sql_drivers_name;
1.10 paf 37: };
38:
39: // methods
40:
1.5 paf 41: static void _if(Request& r, const String&, MethodParams *params) {
1.48 parser 42: Value& condition_code=params->as_junction(0, "condition must be expression");
1.1 paf 43:
1.81 paf 44: bool condition=r.process_to_value(condition_code,
1.83 paf 45: /*0/*no name* /,*/
1.1 paf 46: false/*don't intercept string*/).as_bool();
1.6 paf 47: if(condition)
1.85 paf 48: r.write_pass_lang(r.process(params->as_junction(1, "'then' parameter must be code")));
1.50 parser 49: else if(params->size()>2)
1.85 paf 50: r.write_pass_lang(r.process(params->as_junction(2, "'else' parameter must be code")));
1.1 paf 51: }
52:
1.5 paf 53: static void _untaint(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 54: Pool& pool=r.pool();
55:
1.60 paf 56: uchar lang;
1.59 paf 57: if(params->size()==1)
58: lang=String::UL_AS_IS; // mark as simply 'tainted'. useful in html from sql
59: else {
60: const String& lang_name=params->as_string(0, "lang must be string");
1.60 paf 61: lang=untaint_lang_name2enum->get_int(lang_name);
1.59 paf 62: if(!lang)
1.78 paf 63: throw Exception(0,
1.59 paf 64: &lang_name,
65: "invalid taint language");
66: }
1.1 paf 67:
68: {
1.59 paf 69: Value& vbody=params->as_junction(params->size()-1, "body must be code");
1.1 paf 70:
71: Temp_lang temp_lang(r, lang); // set temporarily specified ^untaint[language;
1.86 paf 72: r.write_pass_lang(r.process(vbody)); // process marking tainted with that lang
1.1 paf 73: }
74: }
75:
1.5 paf 76: static void _taint(Request& r, const String&, MethodParams *params) {
1.1 paf 77: Pool& pool=r.pool();
78:
1.60 paf 79: uchar lang;
1.1 paf 80: if(params->size()==1)
81: lang=String::UL_TAINTED; // mark as simply 'tainted'. useful in table:set
82: else {
1.48 parser 83: const String& lang_name=params->as_string(0, "lang must be string");
1.60 paf 84: lang=untaint_lang_name2enum->get_int(lang_name);
1.1 paf 85: if(!lang)
1.78 paf 86: throw Exception(0,
1.3 paf 87: &lang_name,
88: "invalid taint language");
1.1 paf 89: }
90:
91: {
1.34 parser 92: Value& vbody=params->as_no_junction(params->size()-1, "body must not be code");
1.1 paf 93:
1.90 paf 94: String& result=*new(pool) String(pool);
1.1 paf 95: result.append(
96: vbody.as_string(), // process marking tainted with that lang
97: lang, true); // force result language to specified
98: r.write_pass_lang(result);
99: }
100: }
101:
1.5 paf 102: static void _process(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 103: // calculate pseudo file name of processed chars
104: // would be something like "/some/file(4) process"
1.88 paf 105: char local_place[MAX_STRING];
1.1 paf 106: #ifndef NO_STRING_ORIGIN
107: const Origin& origin=method_name.origin();
1.88 paf 108: size_t place_size=snprintf(local_place, MAX_STRING, "%s(%d) %s",
1.87 paf 109: origin.file?origin.file:"unknown_file", 1+origin.line,
1.88 paf 110: method_name.cstr())+1;
1.1 paf 111: #else
1.88 paf 112: strncpy(local_place, method_name.cstr(), MAX_STRING-1); place[MAX_STRING-1]=0;
113: size_t place_size=strlen(local_place)+1;
114: #endif
115: char *heap_place=(char *)r.malloc(place_size);
116: memcpy(heap_place, local_place, place_size);
117:
1.1 paf 118:
119: VStateless_class& self_class=*r.self->get_class();
1.73 paf 120: const Method *main_method;
1.1 paf 121: {
1.73 paf 122: // temporary remove language change
123: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
1.1 paf 124: // temporary zero @main so to maybe-replace it in processed code
125: Temp_method temp_method_main(self_class, *main_method_name, 0);
126: // temporary zero @auto so it wouldn't be auto-called in Request::use_buf
127: Temp_method temp_method_auto(self_class, *auto_method_name, 0);
128:
129: // evaluate source to process
1.86 paf 130: const String& source=r.process_to_string(params->as_junction(0, "body must be code"));
1.1 paf 131:
132: // process source code, append processed methods to 'self' class
133: // maybe-define new @main
1.67 paf 134: r.use_buf(
135: source.cstr(String::UL_UNSPECIFIED, r.connection(0)),
1.88 paf 136: heap_place,
1.67 paf 137: &self_class);
1.1 paf 138:
1.73 paf 139: // main_method
140: main_method=self_class.get_method(*main_method_name);
141: }
142: // after restoring current-request-lang
143: // maybe-execute @main[]
144: if(main_method) {
145: // execute!
146: r.execute(*main_method->parser_code);
1.1 paf 147: }
148: }
149:
1.5 paf 150: static void _rem(Request& r, const String&, MethodParams *params) {
1.34 parser 151: params->as_junction(0, "body must be code");
1.1 paf 152: }
153:
1.5 paf 154: static void _while(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 155: Pool& pool=r.pool();
156:
1.34 parser 157: Value& vcondition=params->as_junction(0, "condition must be expression");
158: Value& body=params->as_junction(1, "body must be code");
1.1 paf 159:
160: // while...
161: int endless_loop_count=0;
162: while(true) {
1.18 parser 163: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
1.78 paf 164: throw Exception("parser.runtime",
1.1 paf 165: &method_name,
166: "endless loop detected");
167:
1.86 paf 168: bool condition=r.process_to_value(vcondition,
1.83 paf 169: /*0/*no name* /,*/
1.1 paf 170: false/*don't intercept string*/).as_bool();
171: if(!condition) // ...condition is true
172: break;
173:
174: // write processed body
1.86 paf 175: r.write_pass_lang(r.process(body));
1.1 paf 176: }
177: }
178:
1.5 paf 179: static void _use(Request& r, const String& method_name, MethodParams *params) {
1.34 parser 180: Value& vfile=params->as_no_junction(0, "file name must not be code");
1.37 parser 181: r.use_file(vfile.as_string());
1.1 paf 182: }
183:
1.5 paf 184: static void _for(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 185: Pool& pool=r.pool();
1.48 parser 186: const String& var_name=params->as_string(0, "var name must be string");
187: int from=params->as_int(1, "from must be int", r);
188: int to=params->as_int(2, "to must be int", r);
1.34 parser 189: Value& body_code=params->as_junction(3, "body must be code");
1.50 parser 190: Value *delim_maybe_code=params->size()>4?¶ms->get(4):0;
1.1 paf 191:
1.57 paf 192: if(to-from>=MAX_LOOPS) // too long loop?
1.78 paf 193: throw Exception("parser.runtime",
1.57 paf 194: &method_name,
195: "endless loop detected");
196:
1.1 paf 197: bool need_delim=false;
198: VInt *vint=new(pool) VInt(pool, 0);
1.93 paf 199: r.root->put_element(var_name, vint);
1.1 paf 200: for(int i=from; i<=to; i++) {
201: vint->set_int(i);
202:
1.86 paf 203: StringOrValue processed_body=r.process(body_code);
1.49 parser 204: if(delim_maybe_code) { // delimiter set?
1.1 paf 205: const String *string=processed_body.get_string();
206: if(need_delim && string && string->size()) // need delim & iteration produced string?
1.86 paf 207: r.write_pass_lang(r.process(*delim_maybe_code));
1.1 paf 208: need_delim=true;
209: }
210: r.write_pass_lang(processed_body);
211: }
212: }
213:
1.15 paf 214: static void _eval(Request& r, const String& method_name, MethodParams *params) {
1.34 parser 215: Value& expr=params->as_junction(0, "need expression");
1.1 paf 216: // evaluate expresion
1.91 paf 217: Value *value_result=r.process_to_value(expr,
1.83 paf 218: /*0/*no name YET* /,*/
1.1 paf 219: true/*don't intercept string*/).as_expr_result();
1.50 parser 220: if(params->size()>1) {
1.34 parser 221: Value& fmt=params->as_no_junction(1, "fmt must not be code");
1.1 paf 222:
223: Pool& pool=r.pool();
224: String& string=*new(pool) String(pool);
1.91 paf 225: string.APPEND_CONST(format(pool, value_result->as_double(), fmt.as_string().cstr()));
226: r.write_no_lang(string);
227: } else
228: r.write_no_lang(*value_result);
1.1 paf 229: }
230:
1.42 parser 231: static void _connect(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 232: Pool& pool=r.pool();
1.63 paf 233: #ifdef RESOURCES_DEBUG
234: struct timeval mt[2];
235: #endif
1.34 parser 236: Value& url=params->as_no_junction(0, "url must not be code");
237: Value& body_code=params->as_junction(1, "body must be code");
1.1 paf 238:
1.19 parser 239: Table *protocol2driver_and_client=
1.35 parser 240: static_cast<Table *>(r.classes_conf.get(r.OP.name()));
1.11 paf 241:
1.63 paf 242: #ifdef RESOURCES_DEBUG
243: //measure:before
244: gettimeofday(&mt[0],NULL);
245: #endif
1.1 paf 246: // connect
1.67 paf 247: SQL_Connection_ptr connection=SQL_driver_manager->get_connection(
1.42 parser 248: url.as_string(), method_name, protocol2driver_and_client);
1.1 paf 249:
1.63 paf 250: #ifdef RESOURCES_DEBUG
251: //measure:after connect
252: gettimeofday(&mt[1],NULL);
253:
254: double t[2];
255: for(int i=0;i<2;i++)
256: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
257:
258: r.sql_connect_time+=t[1]-t[0];
259: #endif
1.67 paf 260: Temp_connection temp_connection(r, connection.get());
1.1 paf 261: // execute body
1.53 parser 262: try {
1.86 paf 263: r.write_assign_lang(r.process(body_code));
1.75 paf 264: } catch(...) { // process problem
1.67 paf 265: connection->mark_to_rollback();
266: /*re*/throw;
1.1 paf 267: }
268: }
269:
1.41 parser 270: #ifndef DOXYGEN
1.28 parser 271: struct Switch_data {
1.82 paf 272: Request *r;
1.28 parser 273: Value *searching;
274: Value *found;
275: Value *_default;
276: };
1.41 parser 277: #endif
1.28 parser 278: static void _switch(Request& r, const String&, MethodParams *params) {
1.82 paf 279: Switch_data data={&r, &r.process_to_value(params->get(0))};
1.79 paf 280: Temp_hash_value switch_data_setter(r.classes_conf, *switch_data_name, &data);
1.28 parser 281:
1.83 paf 282: Value& cases_code=params->as_junction(1, "switch cases must be code");
1.82 paf 283: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
284: // because of stacked WWrapper used there as wcontext
1.84 paf 285: r.process(cases_code, true/*intercept_string*/);
1.83 paf 286: if(Value *selected_code=data.found ? data.found : data._default) {
287: // setting code context, would execute in ^switch[...]{>>context<<}
288: selected_code->get_junction()->change_context(cases_code.get_junction());
1.86 paf 289: r.write_pass_lang(r.process(*selected_code));
1.83 paf 290: }
1.28 parser 291: }
292:
1.38 parser 293: static void _case(Request& r, const String& method_name, MethodParams *params) {
294: Pool& pool=r.pool();
295:
296: Switch_data *data=static_cast<Switch_data *>(r.classes_conf.get(*switch_data_name));
297: if(!data)
1.78 paf 298: throw Exception("parser.runtime",
1.38 parser 299: &method_name,
300: "without switch");
1.28 parser 301:
302: int count=params->size();
1.34 parser 303: Value *code=¶ms->as_junction(--count, "case result must be code");
1.83 paf 304:
305: // killing context for safety, would execute in ^switch[...]{>>context<<}
306: // reason: context is stacked, and it would become invalid afterwards
307: code->get_junction()->change_context(0);
308:
1.28 parser 309: for(int i=0; i<count; i++) {
1.81 paf 310: Value& value=r.process_to_value(params->get(i));
1.28 parser 311:
1.82 paf 312: if(value.as_string() == CASE_DEFAULT_VALUE) {
1.38 parser 313: data->_default=code;
1.28 parser 314: break;
315: }
316:
317: bool matches;
1.38 parser 318: if(data->searching->is_string())
319: matches=data->searching->as_string() == value.as_string();
1.28 parser 320: else
1.38 parser 321: matches=data->searching->as_double() == value.as_double();
1.28 parser 322:
323: if(matches) {
1.82 paf 324: if(data->found)
325: throw Exception("parser.runtime",
326: &method_name,
327: "duplicate found");
328:
1.38 parser 329: data->found=code;
1.28 parser 330: break;
331: }
332: }
333: }
334:
1.63 paf 335: // cache--
336:
337: // consts
338:
1.79 paf 339: const int DATA_STRING_SERIALIZED_VERSION=0x0002;
1.63 paf 340:
341: // helper types
342:
343: #ifndef DOXYGEN
344: struct Data_string_serialized_prolog {
345: int version;
1.79 paf 346: time_t expires;
1.63 paf 347: };
348: #endif
349:
1.68 paf 350: void cache_delete(const String& file_spec) {
351: file_delete(file_spec, false/*fail_on_read_problem*/);
1.63 paf 352: }
1.69 paf 353:
354: #ifndef DOXYGEN
1.79 paf 355: struct Cache_data {
356: time_t expires;
357: };
1.69 paf 358: struct Locked_process_and_cache_put_action_info {
359: Request *r;
1.79 paf 360: Cache_data *data;
1.81 paf 361: Value *body_code; const String *evaluated_body;
1.69 paf 362: };
363: #endif
364: static void locked_process_and_cache_put_action(int f, void *context) {
365: Locked_process_and_cache_put_action_info& info=
366: *static_cast<Locked_process_and_cache_put_action_info *>(context);
367:
368: // body->process
1.81 paf 369: info.evaluated_body=&info.r->process_to_string(*info.body_code);
1.69 paf 370:
1.79 paf 371: // expiration time not spoiled by ^cache(0) or something?
372: if(info.data->expires > time(0)) {
373: // string -serialize> buffer
374: void *data; size_t data_size;
1.81 paf 375: info.evaluated_body->serialize(
1.79 paf 376: sizeof(Data_string_serialized_prolog),
377: data, data_size);
378: Data_string_serialized_prolog& prolog=
379: *static_cast<Data_string_serialized_prolog *>(data);
380: prolog.version=DATA_STRING_SERIALIZED_VERSION;
381: prolog.expires=info.data->expires;
382:
383: // buffer -write> file
384: write(f, data, data_size);
385: } else // expired!
386: info.data->expires=0; // flag it so that could be easily checked by caller
1.69 paf 387: }
1.81 paf 388: const String *locked_process_and_cache_put(Request& r,
1.69 paf 389: Value& body_code,
1.79 paf 390: Cache_data& data,
1.69 paf 391: const String& file_spec) {
392: Locked_process_and_cache_put_action_info info={
393: &r,
1.81 paf 394: &data,
395: &body_code
1.69 paf 396: };
397:
1.81 paf 398: const String *result=file_write_action_under_lock(
1.69 paf 399: file_spec,
400: "cache_put", locked_process_and_cache_put_action, &info,
401: false/*as_text*/,
402: false/*do_append*/,
1.81 paf 403: false/*block*/) ? info.evaluated_body: 0;
1.79 paf 404: if(data.expires==0)
405: cache_delete(file_spec);
406: return result;
1.63 paf 407: }
1.79 paf 408: String *cache_get(Pool& pool, const String& file_spec, time_t now) {
1.63 paf 409: void* data; size_t data_size;
1.72 paf 410: if(file_read(pool, file_spec,
1.63 paf 411: data, data_size,
412: false/*as_text*/,
1.69 paf 413: false/*fail_on_read_problem*/)
1.72 paf 414: && data_size/* ignore reads which are empty due to
415: non-unary open+lockEX conflict with lockSH */) {
1.63 paf 416:
1.72 paf 417: Data_string_serialized_prolog& prolog=
418: *static_cast<Data_string_serialized_prolog *>(data);
1.63 paf 419:
1.72 paf 420: String *result=new(pool) String(pool);
421: if(
422: data_size>=sizeof(Data_string_serialized_prolog)
423: && prolog.version==DATA_STRING_SERIALIZED_VERSION
1.79 paf 424: && prolog.expires > now
1.72 paf 425: && result->deserialize(
426: sizeof(Data_string_serialized_prolog), data, data_size, file_spec.cstr()))
427: return result;
428: }
1.63 paf 429:
1.72 paf 430: return 0;
1.63 paf 431: }
1.79 paf 432: static time_t as_expires(Request& r, const String& method_name, MethodParams *params,
433: int index, time_t now) {
434: time_t result;
435: Value& vlifespan_or_expires=params->get(index);
436: if(strcmp(vlifespan_or_expires.type(), VDATE_TYPE)==0)
437: result=static_cast<VDate&>(vlifespan_or_expires).get_time();
438: else
439: result=now+(time_t)params->as_double(index, "lifespan must be date or number", r);
440:
441: return result;
442: }
443: static const String as_file_spec(Request&r, MethodParams *params, int index) {
444: return r.absolute(params->as_string(index, "filespec must be string"));
445: }
1.63 paf 446: static void _cache(Request& r, const String& method_name, MethodParams *params) {
447: Pool& pool=r.pool();
1.79 paf 448: time_t now=time(0);
449:
450: // ^cache[filename] ^cache(seconds) ^cache[expires date]
451: if(params->size()==1) {
452: if(params->get(0).is_string()) { // filename?
453: cache_delete(as_file_spec(r, params, 0));
454: return;
455: }
456:
457: // secods|expires date
458: Cache_data *data=static_cast<Cache_data *>(r.classes_conf.get(*cache_data_name));
459: if(!data)
460: throw Exception("parser.runtime",
461: &method_name,
462: "expire-time reducing instruction without cache");
463:
464: time_t expires=as_expires(r, method_name, params, 0, now);
465: if(expires < data->expires)
466: data->expires=expires;
467:
468: return;
469: }
1.63 paf 470:
471: // file_spec, expires, body code
1.65 paf 472: const String &file_spec=r.absolute(params->as_string(0, "filespec must be string"));
473:
1.79 paf 474: Cache_data data;
475: Temp_hash_value cache_data_setter(r.classes_conf, *cache_data_name, &data);
476: data.expires=as_expires(r, method_name, params, 1, now);
1.63 paf 477: Value& body_code=params->as_junction(2, "body must be code");
478:
1.79 paf 479: if(data.expires>now) { // valid 'expires' specified? try cached copy...
1.69 paf 480: // hence we don't hope to have unary create/lockEX
481: // we need some plan to live in a life like that, so...
482: // worst races plan:
483: // A B
484: // open
485: // |open
486: // lockSH
487: // |nonblocking-lockEX fails
488: // unlockSH
489: // close, cache_get returns 0
490: // open
491: // nonblocking-lockEX succeeds; process, write, close
492: // |retry1: open
493: // ...
494: // |lockSH succeeds; ...
495:
496: for(int retry=0; retry<2; retry++) {
1.79 paf 497: if(String *cached_body=cache_get(pool, file_spec, now)) { // have cached copy?
498: // write it out
499: r.write_assign_lang(*cached_body);
500: // happy with it
501: return;
502: }
1.69 paf 503:
504: // non-blocked lock; process; cache it
1.81 paf 505: if(const String*processed_body=
506: locked_process_and_cache_put(r, body_code, data, file_spec)) {
1.63 paf 507: // write it out
1.69 paf 508: r.write_assign_lang(*processed_body);
1.63 paf 509: // happy with it
510: return;
1.69 paf 511: } else { // somebody writing result right now
512: pa_sleep(0, 500000); // waiting half a second
513: retry=0; // prolonging our wait, than could cache_get it, without processing body_code
1.63 paf 514: }
1.69 paf 515: }
1.78 paf 516: throw Exception(0,
1.69 paf 517: &file_spec,
518: "locking problem");
519: } else {
1.79 paf 520: // instructed not to cache; forget cached copy
1.68 paf 521: cache_delete(file_spec);
1.69 paf 522: // process
1.81 paf 523: const String& processed_body=r.process_to_string(body_code);
1.69 paf 524: // write it out
525: r.write_assign_lang(processed_body);
526: // happy with it
527: return;
528: }
529: // never reached
1.63 paf 530: }
531:
1.74 paf 532: // also used in pa_request.C to pass param to @unhandled_exception
533: VHash& exception2vhash(Pool& pool, const Exception& e) {
534: VHash& result=*new(pool) VHash(pool);
535: Hash& hash=result.hash(0);
1.94 ! paf 536: if(const char *type=e.type(true))
1.78 paf 537: hash.put(*exception_type_part_name, new(pool) VString(*new(pool) String(pool, type)));
1.76 paf 538: if(const String *asource=e.problem_source()) {
539: String& source=*new(pool) String(pool);
540: source.append(*asource, String::UL_TAINTED, true/*forced*/);
1.74 paf 541:
1.76 paf 542: hash.put(*exception_source_part_name, new(pool) VString(source));
1.74 paf 543: #ifndef NO_STRING_ORIGIN
1.76 paf 544: const Origin& origin=source.origin();
1.89 paf 545: hash.put(*new(pool) String(pool, "file", 0, true),
1.74 paf 546: new(pool) VString(*new(pool) String(pool, origin.file)));
547: hash.put(*new(pool) String(pool, "lineno"),
548: new(pool) VInt(pool, 1+origin.line));
549: #endif
550: }
1.94 ! paf 551: if(const char *ecomment=e.comment(true)) {
1.74 paf 552: int comment_size=strlen(ecomment);
553: char *pcomment=(char *)pool.malloc(comment_size);
554: memcpy(pcomment, ecomment, comment_size);
555: hash.put(*exception_comment_part_name,
1.76 paf 556: new(pool) VString(*new(pool) String(pool, pcomment, comment_size, true/*tainted*/)));
1.74 paf 557: }
558: hash.put(*exception_handled_part_name,
559: new(pool) VBool(pool, false));
560:
561: return result;
562: }
563:
564: static void _try_operator(Request& r, const String& method_name, MethodParams *params) {
565: Pool& pool=r.pool();
566:
567: Value& body_code=params->as_junction(0, "body_code must be code");
568: Value& catch_code=params->as_junction(1, "catch_code must be code");
569:
1.86 paf 570: StringOrValue result;
1.74 paf 571:
572: // taking snapshot of request processing status
1.77 paf 573: //int ssexception_trace=r.exception_trace.top_index();
574: int sstack=r.stack.top_index();
1.74 paf 575: Value *sself=r.self, *sroot=r.root, *srcontext=r.rcontext;
576: WContext *swcontext=r.wcontext;
577: try {
1.86 paf 578: result=r.process(body_code);
1.74 paf 579: } catch(const Exception& e) {
580: // restoring request processing status
1.77 paf 581: //r.exception_trace.top_index(ssexception_trace);
582: r.stack.top_index(sstack);
1.74 paf 583: r.self=sself; r.root=sroot, r.rcontext=srcontext; r.wcontext=swcontext;
1.77 paf 584:
1.74 paf 585:
586: VHash& vhash=exception2vhash(pool, e);
587:
588: Junction *junction=catch_code.get_junction();
589: Value *saved_exception_var_value=junction->root->get_element(*exception_var_name);
590: junction->root->put_element(*exception_var_name, &vhash);
1.86 paf 591: result=r.process(catch_code);
1.74 paf 592: bool handled=false;
593: if(Value *value=static_cast<Value *>(vhash.hash(0).get(*exception_handled_part_name)))
594: handled=value->as_bool();
595: junction->root->put_element(*exception_var_name, saved_exception_var_value);
596:
597: if(!handled)
598: throw(e); // rethrow
599: }
600: // write it out
1.86 paf 601: r.write_pass_lang(result);
1.74 paf 602: }
603:
604: static void _throw_operator(Request& r, const String& method_name, MethodParams *params) {
605: Pool& pool=r.pool();
606:
607: if(params->size()==1) {
608: Value& param0=params->get(0);
609: if(Hash *hash=param0.get_hash(&method_name)) {
1.78 paf 610: const char *type=0;
1.74 paf 611: if(Value *value=static_cast<Value *>(hash->get(*exception_type_part_name)))
1.78 paf 612: type=value->as_string().cstr();
1.74 paf 613: const String *source=0;
614: if(Value *value=static_cast<Value *>(hash->get(*exception_source_part_name)))
615: source=&value->as_string();
616: const char *comment=0;
617: if(Value *value=
618: static_cast<Value *>(hash->get(*exception_comment_part_name)))
619: comment=value->as_string().cstr();
620:
1.78 paf 621: throw Exception(type,
1.74 paf 622: source?source:&method_name,
623: comment);
624: } else
1.78 paf 625: throw Exception("parser.runtime",
1.74 paf 626: &method_name,
627: "one-param version has hash param");
628: } else {
1.78 paf 629: const char *type=params->as_string(0, "type must be string").cstr();
1.74 paf 630: const String& source=params->as_string(1, "source must be string");
1.92 paf 631: const char *comment=params->size()>2?params->as_string(2, "comment must be string").cstr():0;
1.94 ! paf 632: throw Exception(type, &source, "%s", comment);
1.74 paf 633: }
634: }
635:
1.10 paf 636: // constructor
637:
1.91 paf 638: MOP::MOP(Pool& apool) : Methoded(apool, "OP"),
1.11 paf 639: main_sql_name(apool, MAIN_SQL_NAME),
640: main_sql_drivers_name(apool, MAIN_SQL_DRIVERS_NAME)
641: {
1.1 paf 642: // ^if(condition){code-when-true}
643: // ^if(condition){code-when-true}{code-when-false}
1.10 paf 644: add_native_method("if", Method::CT_ANY, _if, 2, 3);
1.1 paf 645:
646: // ^untaint[as-is|uri|sql|js|html|html-typo]{code}
1.59 paf 647: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2);
1.1 paf 648:
649: // ^taint[as-is|uri|sql|js|html|html-typo]{code}
1.10 paf 650: add_native_method("taint", Method::CT_ANY, _taint, 1, 2);
1.1 paf 651:
652: // ^process[code]
1.10 paf 653: add_native_method("process", Method::CT_ANY, _process, 1, 1);
1.1 paf 654:
655: // ^rem{code}
1.51 parser 656: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000);
1.1 paf 657:
658: // ^while(condition){code}
1.10 paf 659: add_native_method("while", Method::CT_ANY, _while, 2, 2);
1.1 paf 660:
661: // ^use[file]
1.10 paf 662: add_native_method("use", Method::CT_ANY, _use, 1, 1);
1.1 paf 663:
1.54 paf 664: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.10 paf 665: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1);
1.1 paf 666:
667: // ^eval(expr)
668: // ^eval(expr)[format]
1.10 paf 669: add_native_method("eval", Method::CT_ANY, _eval, 1, 2);
1.52 parser 670:
1.1 paf 671: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 672: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
673:
1.63 paf 674:
1.65 paf 675: // ^cache[file_spec] delete cache
1.63 paf 676: // ^cache[file_spec](time){code} time=0 no cache
1.65 paf 677: add_native_method("cache", Method::CT_ANY, _cache, 1, 3);
1.63 paf 678:
1.28 parser 679: // switch
680:
681: // ^switch[value]{cases}
682: add_native_method("switch", Method::CT_ANY, _switch, 2, 2);
683:
684: // ^case[value]{code}
1.51 parser 685: add_native_method("case", Method::CT_ANY, _case, 2, 10000);
1.74 paf 686:
687: // try-catch
688:
689: // ^try{code}{catch code}
690: add_native_method("try", Method::CT_ANY, _try_operator, 2, 2);
691: // ^throw[$exception hash]
692: // ^throw[type;source;comment]
693: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
694:
1.10 paf 695: }
1.11 paf 696:
697: // constructor & configurator
1.1 paf 698:
1.10 paf 699: Methoded *MOP_create(Pool& pool) {
1.35 parser 700: return new(pool) MOP(pool);
1.11 paf 701: }
702:
703: void MOP::configure_user(Request& r) {
704: Pool& pool=r.pool();
705:
706: // $MAIN:SQL.drivers
707: if(Value *sql=r.main_class->get_element(main_sql_name))
708: if(Value *element=sql->get_element(main_sql_drivers_name))
709: if(Table *protocol2library=element->get_table())
710: r.classes_conf.put(name(), protocol2library);
1.1 paf 711: }
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