Annotation of parser3/src/classes/op.C, revision 1.127.2.5
1.1 paf 1: /** @file
1.9 paf 2: Parser: parser @b operators.
1.1 paf 3:
1.127.2.5! paf 4: Copyright (c) 2001-2003 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:
1.127.2.5! paf 8: static const char* IDENT_OP_C="$Date: 2003/01/31 12:10:41 $";
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:
1.127.2.1 paf 33: // helpers
34:
1.127.2.3 paf 35: Hash<StringPtr, int> Hash untaint_lang_name2enum;
1.127.2.1 paf 36:
1.10 paf 37: // methods
38:
1.5 paf 39: static void _if(Request& r, const String&, MethodParams *params) {
1.48 parser 40: Value& condition_code=params->as_junction(0, "condition must be expression");
1.1 paf 41:
1.81 paf 42: bool condition=r.process_to_value(condition_code,
1.83 paf 43: /*0/*no name* /,*/
1.1 paf 44: false/*don't intercept string*/).as_bool();
1.6 paf 45: if(condition)
1.85 paf 46: r.write_pass_lang(r.process(params->as_junction(1, "'then' parameter must be code")));
1.50 parser 47: else if(params->size()>2)
1.85 paf 48: r.write_pass_lang(r.process(params->as_junction(2, "'else' parameter must be code")));
1.1 paf 49: }
50:
1.5 paf 51: static void _untaint(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 52: Pool& pool=r.pool();
53:
1.60 paf 54: uchar lang;
1.59 paf 55: if(params->size()==1)
56: lang=String::UL_AS_IS; // mark as simply 'tainted'. useful in html from sql
57: else {
58: const String& lang_name=params->as_string(0, "lang must be string");
1.60 paf 59: lang=untaint_lang_name2enum->get_int(lang_name);
1.59 paf 60: if(!lang)
1.78 paf 61: throw Exception(0,
1.59 paf 62: &lang_name,
63: "invalid taint language");
64: }
1.1 paf 65:
66: {
1.59 paf 67: Value& vbody=params->as_junction(params->size()-1, "body must be code");
1.1 paf 68:
69: Temp_lang temp_lang(r, lang); // set temporarily specified ^untaint[language;
1.86 paf 70: r.write_pass_lang(r.process(vbody)); // process marking tainted with that lang
1.1 paf 71: }
72: }
73:
1.5 paf 74: static void _taint(Request& r, const String&, MethodParams *params) {
1.1 paf 75: Pool& pool=r.pool();
76:
1.60 paf 77: uchar lang;
1.1 paf 78: if(params->size()==1)
79: lang=String::UL_TAINTED; // mark as simply 'tainted'. useful in table:set
80: else {
1.48 parser 81: const String& lang_name=params->as_string(0, "lang must be string");
1.60 paf 82: lang=untaint_lang_name2enum->get_int(lang_name);
1.1 paf 83: if(!lang)
1.78 paf 84: throw Exception(0,
1.3 paf 85: &lang_name,
86: "invalid taint language");
1.1 paf 87: }
88:
89: {
1.34 parser 90: Value& vbody=params->as_no_junction(params->size()-1, "body must not be code");
1.1 paf 91:
1.90 paf 92: String& result=*new(pool) String(pool);
1.1 paf 93: result.append(
94: vbody.as_string(), // process marking tainted with that lang
95: lang, true); // force result language to specified
96: r.write_pass_lang(result);
97: }
98: }
99:
1.5 paf 100: static void _process(Request& r, const String& method_name, MethodParams *params) {
1.97 paf 101: Pool& pool=r.pool();
1.73 paf 102: const Method *main_method;
1.119 paf 103: Value& target_self=params->size()>1?
104: params->as_no_junction(0, "target must not be code")
105: :r.get_method_frame()->caller()->self();
1.1 paf 106: {
1.116 paf 107: Value& vjunction=params->as_junction(params->size()-1, "body must be code");
1.114 paf 108:
1.124 paf 109: VStateless_class *target_class=target_self.get_last_derived_class();
1.116 paf 110: if(!target_class)
111: throw Exception("parser.runtime",
112: &method_name,
113: "no target class");
114:
1.114 paf 115: // evaluate source to process
116: const String& source=r.process_to_string(vjunction);
117:
1.73 paf 118: // temporary remove language change
119: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
1.1 paf 120: // temporary zero @main so to maybe-replace it in processed code
1.116 paf 121: Temp_method temp_method_main(*target_class, r.main_method_name, 0);
1.1 paf 122: // temporary zero @auto so it wouldn't be auto-called in Request::use_buf
1.116 paf 123: Temp_method temp_method_auto(*target_class, *auto_method_name, 0);
1.1 paf 124:
1.101 paf 125: // calculate pseudo file name of processed chars
126: // would be something like "/some/file(4) process"
127: char local_place[MAX_STRING];
128: #ifndef NO_STRING_ORIGIN
129: const Origin& source_origin=source.origin();
130: const Origin& method_origin=method_name.origin();
131: size_t place_size;
132: if(source_origin.file==method_origin.file)
133: place_size=snprintf(local_place, MAX_STRING, "%s(%d) %s", // same file
134: source_origin.file?source_origin.file:"unknown_file", 1+source_origin.line,
135: method_name.cstr())+1;
136: else // different files ^process{external__file_text__or__sql}
137: place_size=snprintf(local_place, MAX_STRING, "%s",
138: source_origin.file?source_origin.file:"unknown_file")+1;
139: #else
140: strncpy(local_place, method_name.cstr(), MAX_STRING-1); place[MAX_STRING-1]=0;
141: size_t place_size=strlen(local_place)+1;
142: #endif
143: char *heap_place=(char *)r.malloc(place_size);
144: memcpy(heap_place, local_place, place_size);
1.1 paf 145:
146: // process source code, append processed methods to 'self' class
147: // maybe-define new @main
1.116 paf 148: r.use_buf(*target_class,
1.67 paf 149: source.cstr(String::UL_UNSPECIFIED, r.connection(0)),
1.97 paf 150: *new(pool) String(pool, heap_place, place_size, true /*tainted*/),
1.113 paf 151: heap_place);
1.1 paf 152:
1.73 paf 153: // main_method
1.116 paf 154: main_method=target_class->get_method(r.main_method_name);
1.73 paf 155: }
156: // after restoring current-request-lang
157: // maybe-execute @main[]
158: if(main_method) {
1.119 paf 159: // temporarily set method_frame's self to target_self
160: Temp_method_frame_self tmfs(*r.get_method_frame(), target_self);
1.73 paf 161: // execute!
162: r.execute(*main_method->parser_code);
1.1 paf 163: }
164: }
165:
1.5 paf 166: static void _rem(Request& r, const String&, MethodParams *params) {
1.34 parser 167: params->as_junction(0, "body must be code");
1.1 paf 168: }
169:
1.5 paf 170: static void _while(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 171: Pool& pool=r.pool();
172:
1.34 parser 173: Value& vcondition=params->as_junction(0, "condition must be expression");
174: Value& body=params->as_junction(1, "body must be code");
1.1 paf 175:
176: // while...
177: int endless_loop_count=0;
178: while(true) {
1.18 parser 179: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
1.78 paf 180: throw Exception("parser.runtime",
1.1 paf 181: &method_name,
182: "endless loop detected");
183:
1.86 paf 184: bool condition=r.process_to_value(vcondition,
1.83 paf 185: /*0/*no name* /,*/
1.1 paf 186: false/*don't intercept string*/).as_bool();
187: if(!condition) // ...condition is true
188: break;
189:
190: // write processed body
1.86 paf 191: r.write_pass_lang(r.process(body));
1.1 paf 192: }
193: }
194:
1.5 paf 195: static void _use(Request& r, const String& method_name, MethodParams *params) {
1.34 parser 196: Value& vfile=params->as_no_junction(0, "file name must not be code");
1.113 paf 197: r.use_file(r.main_class, vfile.as_string());
1.1 paf 198: }
199:
1.5 paf 200: static void _for(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 201: Pool& pool=r.pool();
1.48 parser 202: const String& var_name=params->as_string(0, "var name must be string");
203: int from=params->as_int(1, "from must be int", r);
204: int to=params->as_int(2, "to must be int", r);
1.34 parser 205: Value& body_code=params->as_junction(3, "body must be code");
1.50 parser 206: Value *delim_maybe_code=params->size()>4?¶ms->get(4):0;
1.1 paf 207:
1.57 paf 208: if(to-from>=MAX_LOOPS) // too long loop?
1.78 paf 209: throw Exception("parser.runtime",
1.57 paf 210: &method_name,
211: "endless loop detected");
212:
1.1 paf 213: bool need_delim=false;
214: VInt *vint=new(pool) VInt(pool, 0);
1.117 paf 215: r.get_method_frame()->caller()->put_element(var_name, vint, false);
1.1 paf 216: for(int i=from; i<=to; i++) {
217: vint->set_int(i);
218:
1.108 paf 219: StringOrValue sv_processed=r.process(body_code);
220: const String *s_processed=sv_processed.get_string();
221: if(delim_maybe_code && s_processed && s_processed->size()) { // delimiter set and we have body
222: if(need_delim) // need delim & iteration produced string?
1.86 paf 223: r.write_pass_lang(r.process(*delim_maybe_code));
1.1 paf 224: need_delim=true;
225: }
1.108 paf 226: r.write_pass_lang(sv_processed);
1.1 paf 227: }
228: }
229:
1.15 paf 230: static void _eval(Request& r, const String& method_name, MethodParams *params) {
1.34 parser 231: Value& expr=params->as_junction(0, "need expression");
1.1 paf 232: // evaluate expresion
1.91 paf 233: Value *value_result=r.process_to_value(expr,
1.83 paf 234: /*0/*no name YET* /,*/
1.1 paf 235: true/*don't intercept string*/).as_expr_result();
1.50 parser 236: if(params->size()>1) {
1.34 parser 237: Value& fmt=params->as_no_junction(1, "fmt must not be code");
1.1 paf 238:
239: Pool& pool=r.pool();
240: String& string=*new(pool) String(pool);
1.91 paf 241: string.APPEND_CONST(format(pool, value_result->as_double(), fmt.as_string().cstr()));
242: r.write_no_lang(string);
243: } else
244: r.write_no_lang(*value_result);
1.1 paf 245: }
246:
1.42 parser 247: static void _connect(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 248: Pool& pool=r.pool();
1.63 paf 249: #ifdef RESOURCES_DEBUG
250: struct timeval mt[2];
251: #endif
1.34 parser 252: Value& url=params->as_no_junction(0, "url must not be code");
253: Value& body_code=params->as_junction(1, "body must be code");
1.1 paf 254:
1.113 paf 255: Table *protocol2driver_and_client=0;
1.125 paf 256: if(Value *sql=r.main_class.get_element(*new(pool) String(pool, MAIN_SQL_NAME), r.main_class, false)) {
257: if(Value *element=sql->get_element(*new(pool) String(pool, MAIN_SQL_DRIVERS_NAME), *sql, false)) {
1.113 paf 258: protocol2driver_and_client=element->get_table();
259: }
260: }
1.11 paf 261:
1.63 paf 262: #ifdef RESOURCES_DEBUG
263: //measure:before
264: gettimeofday(&mt[0],NULL);
265: #endif
1.1 paf 266: // connect
1.67 paf 267: SQL_Connection_ptr connection=SQL_driver_manager->get_connection(
1.42 parser 268: url.as_string(), method_name, protocol2driver_and_client);
1.1 paf 269:
1.63 paf 270: #ifdef RESOURCES_DEBUG
271: //measure:after connect
272: gettimeofday(&mt[1],NULL);
273:
274: double t[2];
275: for(int i=0;i<2;i++)
276: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
277:
278: r.sql_connect_time+=t[1]-t[0];
279: #endif
1.67 paf 280: Temp_connection temp_connection(r, connection.get());
1.1 paf 281: // execute body
1.53 parser 282: try {
1.86 paf 283: r.write_assign_lang(r.process(body_code));
1.75 paf 284: } catch(...) { // process problem
1.67 paf 285: connection->mark_to_rollback();
286: /*re*/throw;
1.1 paf 287: }
288: }
289:
1.41 parser 290: #ifndef DOXYGEN
1.28 parser 291: struct Switch_data {
1.82 paf 292: Request *r;
1.28 parser 293: Value *searching;
294: Value *found;
295: Value *_default;
296: };
1.41 parser 297: #endif
1.28 parser 298: static void _switch(Request& r, const String&, MethodParams *params) {
1.82 paf 299: Switch_data data={&r, &r.process_to_value(params->get(0))};
1.79 paf 300: Temp_hash_value switch_data_setter(r.classes_conf, *switch_data_name, &data);
1.28 parser 301:
1.83 paf 302: Value& cases_code=params->as_junction(1, "switch cases must be code");
1.82 paf 303: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
304: // because of stacked WWrapper used there as wcontext
1.84 paf 305: r.process(cases_code, true/*intercept_string*/);
1.83 paf 306: if(Value *selected_code=data.found ? data.found : data._default) {
307: // setting code context, would execute in ^switch[...]{>>context<<}
1.105 paf 308: //selected_code->get_junction()->change_context(cases_code.get_junction());
1.107 paf 309: r.write_pass_lang(r.process(*selected_code));
1.83 paf 310: }
1.28 parser 311: }
312:
1.38 parser 313: static void _case(Request& r, const String& method_name, MethodParams *params) {
314: Pool& pool=r.pool();
315:
316: Switch_data *data=static_cast<Switch_data *>(r.classes_conf.get(*switch_data_name));
317: if(!data)
1.78 paf 318: throw Exception("parser.runtime",
1.38 parser 319: &method_name,
320: "without switch");
1.28 parser 321:
322: int count=params->size();
1.34 parser 323: Value *code=¶ms->as_junction(--count, "case result must be code");
1.83 paf 324:
325: // killing context for safety, would execute in ^switch[...]{>>context<<}
326: // reason: context is stacked, and it would become invalid afterwards
1.105 paf 327: //code->get_junction()->change_context(0);
1.83 paf 328:
1.28 parser 329: for(int i=0; i<count; i++) {
1.81 paf 330: Value& value=r.process_to_value(params->get(i));
1.28 parser 331:
1.82 paf 332: if(value.as_string() == CASE_DEFAULT_VALUE) {
1.38 parser 333: data->_default=code;
1.28 parser 334: break;
335: }
336:
337: bool matches;
1.38 parser 338: if(data->searching->is_string())
339: matches=data->searching->as_string() == value.as_string();
1.28 parser 340: else
1.38 parser 341: matches=data->searching->as_double() == value.as_double();
1.28 parser 342:
343: if(matches) {
1.82 paf 344: if(data->found)
345: throw Exception("parser.runtime",
346: &method_name,
347: "duplicate found");
348:
1.38 parser 349: data->found=code;
1.28 parser 350: break;
351: }
352: }
353: }
354:
1.63 paf 355: // cache--
356:
357: // consts
358:
1.127.2.2 paf 359: const int DATA_STRING_SERIALIZED_VERSION=0x0003;
1.63 paf 360:
361: // helper types
362:
363: #ifndef DOXYGEN
364: struct Data_string_serialized_prolog {
365: int version;
1.79 paf 366: time_t expires;
1.63 paf 367: };
368: #endif
369:
1.68 paf 370: void cache_delete(const String& file_spec) {
371: file_delete(file_spec, false/*fail_on_read_problem*/);
1.63 paf 372: }
1.69 paf 373:
374: #ifndef DOXYGEN
1.79 paf 375: struct Cache_data {
376: time_t expires;
377: };
1.69 paf 378: struct Locked_process_and_cache_put_action_info {
379: Request *r;
1.79 paf 380: Cache_data *data;
1.81 paf 381: Value *body_code; const String *evaluated_body;
1.69 paf 382: };
383: #endif
1.127.2.2 paf 384: /* @todo maybe network order worth spending some effort?
385: don't bothering myself with network byte order,
386: am not planning to be able to move resulting file across platforms
387: */
1.69 paf 388: static void locked_process_and_cache_put_action(int f, void *context) {
389: Locked_process_and_cache_put_action_info& info=
390: *static_cast<Locked_process_and_cache_put_action_info *>(context);
391:
392: // body->process
1.81 paf 393: info.evaluated_body=&info.r->process_to_string(*info.body_code);
1.69 paf 394:
1.79 paf 395: // expiration time not spoiled by ^cache(0) or something?
396: if(info.data->expires > time(0)) {
397: // string -serialize> buffer
398: void *data; size_t data_size;
1.81 paf 399: info.evaluated_body->serialize(
1.79 paf 400: sizeof(Data_string_serialized_prolog),
401: data, data_size);
402: Data_string_serialized_prolog& prolog=
403: *static_cast<Data_string_serialized_prolog *>(data);
404: prolog.version=DATA_STRING_SERIALIZED_VERSION;
405: prolog.expires=info.data->expires;
406:
407: // buffer -write> file
408: write(f, data, data_size);
409: } else // expired!
410: info.data->expires=0; // flag it so that could be easily checked by caller
1.69 paf 411: }
1.81 paf 412: const String *locked_process_and_cache_put(Request& r,
1.69 paf 413: Value& body_code,
1.79 paf 414: Cache_data& data,
1.69 paf 415: const String& file_spec) {
416: Locked_process_and_cache_put_action_info info={
417: &r,
1.81 paf 418: &data,
419: &body_code
1.69 paf 420: };
421:
1.81 paf 422: const String *result=file_write_action_under_lock(
1.69 paf 423: file_spec,
424: "cache_put", locked_process_and_cache_put_action, &info,
425: false/*as_text*/,
426: false/*do_append*/,
1.96 paf 427: false/*block*/,
428: false/*fail on lock problem*/) ? info.evaluated_body: 0;
1.100 paf 429: time_t now=time(0);
430: if(data.expires<=now)
1.79 paf 431: cache_delete(file_spec);
432: return result;
1.63 paf 433: }
1.79 paf 434: String *cache_get(Pool& pool, const String& file_spec, time_t now) {
1.63 paf 435: void* data; size_t data_size;
1.72 paf 436: if(file_read(pool, file_spec,
1.63 paf 437: data, data_size,
438: false/*as_text*/,
1.126 paf 439: 0, 0, //no params&out_fields
1.69 paf 440: false/*fail_on_read_problem*/)
1.72 paf 441: && data_size/* ignore reads which are empty due to
442: non-unary open+lockEX conflict with lockSH */) {
1.63 paf 443:
1.72 paf 444: Data_string_serialized_prolog& prolog=
445: *static_cast<Data_string_serialized_prolog *>(data);
1.63 paf 446:
1.72 paf 447: String *result=new(pool) String(pool);
448: if(
449: data_size>=sizeof(Data_string_serialized_prolog)
450: && prolog.version==DATA_STRING_SERIALIZED_VERSION
1.79 paf 451: && prolog.expires > now
1.72 paf 452: && result->deserialize(
453: sizeof(Data_string_serialized_prolog), data, data_size, file_spec.cstr()))
454: return result;
455: }
1.63 paf 456:
1.72 paf 457: return 0;
1.63 paf 458: }
1.79 paf 459: static time_t as_expires(Request& r, const String& method_name, MethodParams *params,
460: int index, time_t now) {
461: time_t result;
462: Value& vlifespan_or_expires=params->get(index);
1.104 paf 463: if(Value *vdate=vlifespan_or_expires.as(VDATE_TYPE, false))
464: result=static_cast<VDate *>(vdate)->get_time();
1.79 paf 465: else
466: result=now+(time_t)params->as_double(index, "lifespan must be date or number", r);
467:
468: return result;
469: }
470: static const String as_file_spec(Request&r, MethodParams *params, int index) {
471: return r.absolute(params->as_string(index, "filespec must be string"));
472: }
1.63 paf 473: static void _cache(Request& r, const String& method_name, MethodParams *params) {
474: Pool& pool=r.pool();
1.79 paf 475: time_t now=time(0);
476:
477: // ^cache[filename] ^cache(seconds) ^cache[expires date]
478: if(params->size()==1) {
479: if(params->get(0).is_string()) { // filename?
480: cache_delete(as_file_spec(r, params, 0));
481: return;
482: }
483:
484: // secods|expires date
485: Cache_data *data=static_cast<Cache_data *>(r.classes_conf.get(*cache_data_name));
486: if(!data)
487: throw Exception("parser.runtime",
488: &method_name,
489: "expire-time reducing instruction without cache");
490:
491: time_t expires=as_expires(r, method_name, params, 0, now);
492: if(expires < data->expires)
493: data->expires=expires;
494:
495: return;
496: }
1.63 paf 497:
498: // file_spec, expires, body code
1.65 paf 499: const String &file_spec=r.absolute(params->as_string(0, "filespec must be string"));
500:
1.79 paf 501: Cache_data data;
502: Temp_hash_value cache_data_setter(r.classes_conf, *cache_data_name, &data);
503: data.expires=as_expires(r, method_name, params, 1, now);
1.63 paf 504: Value& body_code=params->as_junction(2, "body must be code");
505:
1.79 paf 506: if(data.expires>now) { // valid 'expires' specified? try cached copy...
1.69 paf 507: // hence we don't hope to have unary create/lockEX
508: // we need some plan to live in a life like that, so...
509: // worst races plan:
510: // A B
511: // open
512: // |open
513: // lockSH
514: // |nonblocking-lockEX fails
515: // unlockSH
516: // close, cache_get returns 0
517: // open
518: // nonblocking-lockEX succeeds; process, write, close
519: // |retry1: open
520: // ...
521: // |lockSH succeeds; ...
522:
523: for(int retry=0; retry<2; retry++) {
1.79 paf 524: if(String *cached_body=cache_get(pool, file_spec, now)) { // have cached copy?
525: // write it out
526: r.write_assign_lang(*cached_body);
527: // happy with it
528: return;
529: }
1.69 paf 530:
531: // non-blocked lock; process; cache it
1.81 paf 532: if(const String*processed_body=
533: locked_process_and_cache_put(r, body_code, data, file_spec)) {
1.63 paf 534: // write it out
1.69 paf 535: r.write_assign_lang(*processed_body);
1.63 paf 536: // happy with it
537: return;
1.69 paf 538: } else { // somebody writing result right now
539: pa_sleep(0, 500000); // waiting half a second
540: retry=0; // prolonging our wait, than could cache_get it, without processing body_code
1.63 paf 541: }
1.69 paf 542: }
1.78 paf 543: throw Exception(0,
1.69 paf 544: &file_spec,
545: "locking problem");
546: } else {
1.79 paf 547: // instructed not to cache; forget cached copy
1.68 paf 548: cache_delete(file_spec);
1.69 paf 549: // process
1.81 paf 550: const String& processed_body=r.process_to_string(body_code);
1.69 paf 551: // write it out
552: r.write_assign_lang(processed_body);
553: // happy with it
554: return;
555: }
556: // never reached
1.63 paf 557: }
558:
1.74 paf 559: // also used in pa_request.C to pass param to @unhandled_exception
560: VHash& exception2vhash(Pool& pool, const Exception& e) {
561: VHash& result=*new(pool) VHash(pool);
562: Hash& hash=result.hash(0);
1.127.2.5! paf 563: if(const char* type=e.type(true))
1.78 paf 564: hash.put(*exception_type_part_name, new(pool) VString(*new(pool) String(pool, type)));
1.76 paf 565: if(const String *asource=e.problem_source()) {
566: String& source=*new(pool) String(pool);
567: source.append(*asource, String::UL_TAINTED, true/*forced*/);
1.74 paf 568:
1.76 paf 569: hash.put(*exception_source_part_name, new(pool) VString(source));
1.74 paf 570: #ifndef NO_STRING_ORIGIN
1.76 paf 571: const Origin& origin=source.origin();
1.89 paf 572: hash.put(*new(pool) String(pool, "file", 0, true),
1.74 paf 573: new(pool) VString(*new(pool) String(pool, origin.file)));
574: hash.put(*new(pool) String(pool, "lineno"),
575: new(pool) VInt(pool, 1+origin.line));
576: #endif
577: }
1.127.2.5! paf 578: if(const char* ecomment=e.comment(true)) {
1.74 paf 579: int comment_size=strlen(ecomment);
580: char *pcomment=(char *)pool.malloc(comment_size);
581: memcpy(pcomment, ecomment, comment_size);
582: hash.put(*exception_comment_part_name,
1.76 paf 583: new(pool) VString(*new(pool) String(pool, pcomment, comment_size, true/*tainted*/)));
1.74 paf 584: }
585: hash.put(*exception_handled_part_name,
586: new(pool) VBool(pool, false));
587:
588: return result;
589: }
590:
591: static void _try_operator(Request& r, const String& method_name, MethodParams *params) {
592: Pool& pool=r.pool();
593:
594: Value& body_code=params->as_junction(0, "body_code must be code");
595: Value& catch_code=params->as_junction(1, "catch_code must be code");
596:
1.86 paf 597: StringOrValue result;
1.123 paf 598: // taking snapshot of try-context
599: Request_context_saver try_context(r);
1.74 paf 600: try {
1.86 paf 601: result=r.process(body_code);
1.74 paf 602: } catch(const Exception& e) {
1.123 paf 603: Request_context_saver throw_context(r); // taking snapshot of throw-context [stack trace contains error]
604: try_context.restore(); // restoring try-context to perform catch-code
605:
1.74 paf 606: VHash& vhash=exception2vhash(pool, e);
607:
608: Junction *junction=catch_code.get_junction();
1.105 paf 609: Value *method_frame=junction->method_frame;
1.125 paf 610: Value *saved_exception_var_value=method_frame->get_element(*exception_var_name, *method_frame, false);
1.105 paf 611: junction->method_frame->put_element(*exception_var_name, &vhash, false);
1.86 paf 612: result=r.process(catch_code);
1.74 paf 613: bool handled=false;
614: if(Value *value=static_cast<Value *>(vhash.hash(0).get(*exception_handled_part_name)))
615: handled=value->as_bool();
1.105 paf 616: junction->method_frame->put_element(*exception_var_name, saved_exception_var_value, false);
1.74 paf 617:
1.123 paf 618: if(!handled) {
619: throw_context.restore(); // restoring throw-context [exception were not handled]
1.74 paf 620: throw(e); // rethrow
1.123 paf 621: }
1.74 paf 622: }
1.123 paf 623: // write out result
1.86 paf 624: r.write_pass_lang(result);
1.74 paf 625: }
626:
627: static void _throw_operator(Request& r, const String& method_name, MethodParams *params) {
628: Pool& pool=r.pool();
629:
630: if(params->size()==1) {
631: Value& param0=params->get(0);
632: if(Hash *hash=param0.get_hash(&method_name)) {
1.127.2.5! paf 633: const char* type=0;
1.74 paf 634: if(Value *value=static_cast<Value *>(hash->get(*exception_type_part_name)))
1.78 paf 635: type=value->as_string().cstr();
1.74 paf 636: const String *source=0;
637: if(Value *value=static_cast<Value *>(hash->get(*exception_source_part_name)))
638: source=&value->as_string();
1.127.2.5! paf 639: const char* comment=0;
1.74 paf 640: if(Value *value=
641: static_cast<Value *>(hash->get(*exception_comment_part_name)))
642: comment=value->as_string().cstr();
643:
1.78 paf 644: throw Exception(type,
1.74 paf 645: source?source:&method_name,
646: comment);
647: } else
1.78 paf 648: throw Exception("parser.runtime",
1.74 paf 649: &method_name,
650: "one-param version has hash param");
651: } else {
1.127.2.5! paf 652: const char* type=params->as_string(0, "type must be string").cstr();
1.74 paf 653: const String& source=params->as_string(1, "source must be string");
1.127.2.5! paf 654: const char* comment=params->size()>2?params->as_string(2, "comment must be string").cstr():0;
1.97 paf 655: throw Exception(type, &source, "%s", comment?comment:"");
1.74 paf 656: }
657: }
658:
1.10 paf 659: // constructor
660:
1.113 paf 661: VClassMAIN::VClassMAIN(Pool& apool): VClass(apool) {
1.121 paf 662: set_name(*NEW String(pool(), MAIN_CLASS_NAME));
663:
1.1 paf 664: // ^if(condition){code-when-true}
665: // ^if(condition){code-when-true}{code-when-false}
1.10 paf 666: add_native_method("if", Method::CT_ANY, _if, 2, 3);
1.1 paf 667:
668: // ^untaint[as-is|uri|sql|js|html|html-typo]{code}
1.59 paf 669: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2);
1.1 paf 670:
671: // ^taint[as-is|uri|sql|js|html|html-typo]{code}
1.10 paf 672: add_native_method("taint", Method::CT_ANY, _taint, 1, 2);
1.1 paf 673:
674: // ^process[code]
1.116 paf 675: add_native_method("process", Method::CT_ANY, _process, 1, 2);
1.1 paf 676:
677: // ^rem{code}
1.51 parser 678: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000);
1.1 paf 679:
680: // ^while(condition){code}
1.10 paf 681: add_native_method("while", Method::CT_ANY, _while, 2, 2);
1.1 paf 682:
683: // ^use[file]
1.10 paf 684: add_native_method("use", Method::CT_ANY, _use, 1, 1);
1.1 paf 685:
1.54 paf 686: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.10 paf 687: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1);
1.1 paf 688:
689: // ^eval(expr)
690: // ^eval(expr)[format]
1.10 paf 691: add_native_method("eval", Method::CT_ANY, _eval, 1, 2);
1.52 parser 692:
1.1 paf 693: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 694: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
695:
1.63 paf 696:
1.65 paf 697: // ^cache[file_spec] delete cache
1.63 paf 698: // ^cache[file_spec](time){code} time=0 no cache
1.65 paf 699: add_native_method("cache", Method::CT_ANY, _cache, 1, 3);
1.63 paf 700:
1.28 parser 701: // switch
702:
703: // ^switch[value]{cases}
704: add_native_method("switch", Method::CT_ANY, _switch, 2, 2);
705:
706: // ^case[value]{code}
1.51 parser 707: add_native_method("case", Method::CT_ANY, _case, 2, 10000);
1.74 paf 708:
709: // try-catch
710:
711: // ^try{code}{catch code}
712: add_native_method("try", Method::CT_ANY, _try_operator, 2, 2);
713: // ^throw[$exception hash]
714: // ^throw[type;source;comment]
715: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
716:
1.10 paf 717: }
1.11 paf 718:
719: // constructor & configurator
1.1 paf 720:
1.127.2.4 paf 721: VStateless_classPtr VClassMAIN_create() {
1.127.2.1 paf 722: #define ULN(name, LANG) \
1.127.2.3 paf 723: untaint_lang_name2enum.put(StringPtr(new String(name)), (int)String::UL_##LANG);
724: ULN("as-is", AS_IS);
725: ULN("optimized-as-is", AS_IS|String::UL_OPTIMIZE_BIT);
726: ULN("file-spec", FILE_SPEC);
727: ULN("http-header", HTTP_HEADER);
728: ULN("mail-header", MAIL_HEADER);
729: ULN("uri", URI);
730: ULN("table", TABLE);
731: ULN("sql", SQL);
732: ULN("js", JS);
733: ULN("xml", XML);
734: ULN("optimized-xml", XML|String::UL_OPTIMIZE_BIT);
735: ULN("html", HTML);
736: ULN("optimized-html", HTML|String::UL_OPTIMIZE_BIT);
1.127.2.1 paf 737: #undef ULN
738:
1.127.2.4 paf 739: return VStateless_classPtr(new VClassMAIN);
1.1 paf 740: }
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