Annotation of parser3/src/classes/op.C, revision 1.127.2.8
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:
1.127.2.8! paf 8: static const char* IDENT_OP_C="$Date: 2003/02/04 14:04:46 $";
1.1 paf 9:
1.13 paf 10: #include "classes.h"
1.127.2.8! paf 11: #include "pa_vmethod_frame.h"
! 12:
1.1 paf 13: #include "pa_common.h"
14: #include "pa_request.h"
15: #include "pa_vint.h"
16: #include "pa_sql_connection.h"
1.79 paf 17: #include "pa_vdate.h"
1.105 paf 18: #include "pa_vmethod_frame.h"
1.1 paf 19:
1.18 parser 20: // limits
21:
22: #define MAX_LOOPS 10000
23:
1.10 paf 24: // defines
25:
1.82 paf 26: #define CASE_DEFAULT_VALUE "DEFAULT"
1.11 paf 27:
1.10 paf 28: // class
29:
1.113 paf 30: class VClassMAIN: public VClass {
1.10 paf 31: public:
1.113 paf 32: VClassMAIN(Pool& apool);
1.10 paf 33: };
34:
1.127.2.1 paf 35: // helpers
36:
1.127.2.3 paf 37: Hash<StringPtr, int> Hash untaint_lang_name2enum;
1.127.2.1 paf 38:
1.10 paf 39: // methods
40:
1.127.2.7 paf 41: static void _if(Request& r, StringPtr /*method_name*/, MethodParams& params) {
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)
1.127.2.7 paf 48: r.write_pass_lang(r.process(params.as_junction(1, "'then' parameter must be code")));
49: else if(params.count()>2)
50: r.write_pass_lang(r.process(params.as_junction(2, "'else' parameter must be code")));
1.1 paf 51: }
52:
1.127.2.7 paf 53: static void _untaint(Request& r, StringPtr method_name, MethodParams& params) {
1.1 paf 54: Pool& pool=r.pool();
55:
1.60 paf 56: uchar lang;
1.127.2.7 paf 57: if(params.count()==1)
1.59 paf 58: lang=String::UL_AS_IS; // mark as simply 'tainted'. useful in html from sql
59: else {
1.127.2.7 paf 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: {
1.127.2.7 paf 69: Value& vbody=params.as_junction(params.count()-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:
1.127.2.7 paf 76: static void _taint(Request& r, StringPtr /*method_name*/, MethodParams& params) {
1.1 paf 77: Pool& pool=r.pool();
78:
1.60 paf 79: uchar lang;
1.127.2.7 paf 80: if(params.count()==1)
1.1 paf 81: lang=String::UL_TAINTED; // mark as simply 'tainted'. useful in table:set
82: else {
1.127.2.7 paf 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: {
1.127.2.7 paf 92: Value& vbody=params.as_no_junction(params.count()-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:
1.127.2.7 paf 102: static void _process(Request& r, StringPtr method_name, MethodParams& params) {
1.97 paf 103: Pool& pool=r.pool();
1.73 paf 104: const Method *main_method;
1.127.2.7 paf 105: Value& target_self=params.count()>1?
106: params.as_no_junction(0, "target must not be code")
1.119 paf 107: :r.get_method_frame()->caller()->self();
1.1 paf 108: {
1.127.2.7 paf 109: Value& vjunction=params.as_junction(params.count()-1, "body must be code");
1.114 paf 110:
1.124 paf 111: VStateless_class *target_class=target_self.get_last_derived_class();
1.116 paf 112: if(!target_class)
113: throw Exception("parser.runtime",
114: &method_name,
115: "no target class");
116:
1.114 paf 117: // evaluate source to process
118: const String& source=r.process_to_string(vjunction);
119:
1.73 paf 120: // temporary remove language change
121: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
1.1 paf 122: // temporary zero @main so to maybe-replace it in processed code
1.116 paf 123: Temp_method temp_method_main(*target_class, r.main_method_name, 0);
1.1 paf 124: // temporary zero @auto so it wouldn't be auto-called in Request::use_buf
1.116 paf 125: Temp_method temp_method_auto(*target_class, *auto_method_name, 0);
1.1 paf 126:
1.101 paf 127: // calculate pseudo file name of processed chars
128: // would be something like "/some/file(4) process"
129: char local_place[MAX_STRING];
130: #ifndef NO_STRING_ORIGIN
131: const Origin& source_origin=source.origin();
132: const Origin& method_origin=method_name.origin();
133: size_t place_size;
134: if(source_origin.file==method_origin.file)
135: place_size=snprintf(local_place, MAX_STRING, "%s(%d) %s", // same file
136: source_origin.file?source_origin.file:"unknown_file", 1+source_origin.line,
137: method_name.cstr())+1;
138: else // different files ^process{external__file_text__or__sql}
139: place_size=snprintf(local_place, MAX_STRING, "%s",
140: source_origin.file?source_origin.file:"unknown_file")+1;
141: #else
142: strncpy(local_place, method_name.cstr(), MAX_STRING-1); place[MAX_STRING-1]=0;
143: size_t place_size=strlen(local_place)+1;
144: #endif
145: char *heap_place=(char *)r.malloc(place_size);
146: memcpy(heap_place, local_place, place_size);
1.1 paf 147:
148: // process source code, append processed methods to 'self' class
149: // maybe-define new @main
1.116 paf 150: r.use_buf(*target_class,
1.67 paf 151: source.cstr(String::UL_UNSPECIFIED, r.connection(0)),
1.97 paf 152: *new(pool) String(pool, heap_place, place_size, true /*tainted*/),
1.113 paf 153: heap_place);
1.1 paf 154:
1.73 paf 155: // main_method
1.116 paf 156: main_method=target_class->get_method(r.main_method_name);
1.73 paf 157: }
158: // after restoring current-request-lang
159: // maybe-execute @main[]
160: if(main_method) {
1.119 paf 161: // temporarily set method_frame's self to target_self
162: Temp_method_frame_self tmfs(*r.get_method_frame(), target_self);
1.73 paf 163: // execute!
164: r.execute(*main_method->parser_code);
1.1 paf 165: }
166: }
167:
1.127.2.7 paf 168: static void _rem(Request& r, StringPtr /*method_name*/, MethodParams& params) {
169: params.as_junction(0, "body must be code");
1.1 paf 170: }
171:
1.127.2.7 paf 172: static void _while(Request& r, StringPtr method_name, MethodParams& params) {
1.1 paf 173: Pool& pool=r.pool();
174:
1.127.2.7 paf 175: Value& vcondition=params.as_junction(0, "condition must be expression");
176: Value& body=params.as_junction(1, "body must be code");
1.1 paf 177:
178: // while...
179: int endless_loop_count=0;
180: while(true) {
1.18 parser 181: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
1.78 paf 182: throw Exception("parser.runtime",
1.1 paf 183: &method_name,
184: "endless loop detected");
185:
1.86 paf 186: bool condition=r.process_to_value(vcondition,
1.83 paf 187: /*0/*no name* /,*/
1.1 paf 188: false/*don't intercept string*/).as_bool();
189: if(!condition) // ...condition is true
190: break;
191:
192: // write processed body
1.86 paf 193: r.write_pass_lang(r.process(body));
1.1 paf 194: }
195: }
196:
1.127.2.7 paf 197: static void _use(Request& r, StringPtr method_name, MethodParams& params) {
198: Value& vfile=params.as_no_junction(0, "file name must not be code");
1.113 paf 199: r.use_file(r.main_class, vfile.as_string());
1.1 paf 200: }
201:
1.127.2.7 paf 202: static void _for(Request& r, StringPtr method_name, MethodParams& params) {
1.1 paf 203: Pool& pool=r.pool();
1.127.2.7 paf 204: const String& var_name=params.as_string(0, "var name must be string");
205: int from=params.as_int(1, "from must be int", r);
206: int to=params.as_int(2, "to must be int", r);
207: Value& body_code=params.as_junction(3, "body must be code");
208: Value *delim_maybe_code=params.count()>4?¶ms.get(4):0;
1.1 paf 209:
1.57 paf 210: if(to-from>=MAX_LOOPS) // too long loop?
1.78 paf 211: throw Exception("parser.runtime",
1.57 paf 212: &method_name,
213: "endless loop detected");
214:
1.1 paf 215: bool need_delim=false;
216: VInt *vint=new(pool) VInt(pool, 0);
1.117 paf 217: r.get_method_frame()->caller()->put_element(var_name, vint, false);
1.1 paf 218: for(int i=from; i<=to; i++) {
219: vint->set_int(i);
220:
1.108 paf 221: StringOrValue sv_processed=r.process(body_code);
222: const String *s_processed=sv_processed.get_string();
223: if(delim_maybe_code && s_processed && s_processed->size()) { // delimiter set and we have body
224: if(need_delim) // need delim & iteration produced string?
1.86 paf 225: r.write_pass_lang(r.process(*delim_maybe_code));
1.1 paf 226: need_delim=true;
227: }
1.108 paf 228: r.write_pass_lang(sv_processed);
1.1 paf 229: }
230: }
231:
1.127.2.7 paf 232: static void _eval(Request& r, StringPtr method_name, MethodParams& params) {
233: Value& expr=params.as_junction(0, "need expression");
1.1 paf 234: // evaluate expresion
1.91 paf 235: Value *value_result=r.process_to_value(expr,
1.83 paf 236: /*0/*no name YET* /,*/
1.1 paf 237: true/*don't intercept string*/).as_expr_result();
1.127.2.7 paf 238: if(params.count()>1) {
239: Value& fmt=params.as_no_junction(1, "fmt must not be code");
1.1 paf 240:
241: Pool& pool=r.pool();
242: String& string=*new(pool) String(pool);
1.91 paf 243: string.APPEND_CONST(format(pool, value_result->as_double(), fmt.as_string().cstr()));
244: r.write_no_lang(string);
245: } else
246: r.write_no_lang(*value_result);
1.1 paf 247: }
248:
1.127.2.7 paf 249: static void _connect(Request& r, StringPtr method_name, MethodParams& params) {
1.1 paf 250: Pool& pool=r.pool();
1.63 paf 251: #ifdef RESOURCES_DEBUG
252: struct timeval mt[2];
253: #endif
1.127.2.7 paf 254: Value& url=params.as_no_junction(0, "url must not be code");
255: Value& body_code=params.as_junction(1, "body must be code");
1.1 paf 256:
1.113 paf 257: Table *protocol2driver_and_client=0;
1.125 paf 258: if(Value *sql=r.main_class.get_element(*new(pool) String(pool, MAIN_SQL_NAME), r.main_class, false)) {
259: if(Value *element=sql->get_element(*new(pool) String(pool, MAIN_SQL_DRIVERS_NAME), *sql, false)) {
1.113 paf 260: protocol2driver_and_client=element->get_table();
261: }
262: }
1.11 paf 263:
1.63 paf 264: #ifdef RESOURCES_DEBUG
265: //measure:before
266: gettimeofday(&mt[0],NULL);
267: #endif
1.1 paf 268: // connect
1.67 paf 269: SQL_Connection_ptr connection=SQL_driver_manager->get_connection(
1.42 parser 270: url.as_string(), method_name, protocol2driver_and_client);
1.1 paf 271:
1.63 paf 272: #ifdef RESOURCES_DEBUG
273: //measure:after connect
274: gettimeofday(&mt[1],NULL);
275:
276: double t[2];
277: for(int i=0;i<2;i++)
278: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
279:
280: r.sql_connect_time+=t[1]-t[0];
281: #endif
1.67 paf 282: Temp_connection temp_connection(r, connection.get());
1.1 paf 283: // execute body
1.53 parser 284: try {
1.86 paf 285: r.write_assign_lang(r.process(body_code));
1.75 paf 286: } catch(...) { // process problem
1.67 paf 287: connection->mark_to_rollback();
1.127.2.6 paf 288: rethrow;
1.1 paf 289: }
290: }
291:
1.41 parser 292: #ifndef DOXYGEN
1.28 parser 293: struct Switch_data {
1.82 paf 294: Request *r;
1.28 parser 295: Value *searching;
296: Value *found;
297: Value *_default;
298: };
1.41 parser 299: #endif
1.127.2.7 paf 300: static void _switch(Request& r, StringPtr /*method_name*/, MethodParams& params) {
301: Switch_data data={&r, &r.process_to_value(params.get(0))};
1.79 paf 302: Temp_hash_value switch_data_setter(r.classes_conf, *switch_data_name, &data);
1.28 parser 303:
1.127.2.7 paf 304: Value& cases_code=params.as_junction(1, "switch cases must be code");
1.82 paf 305: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
306: // because of stacked WWrapper used there as wcontext
1.84 paf 307: r.process(cases_code, true/*intercept_string*/);
1.83 paf 308: if(Value *selected_code=data.found ? data.found : data._default) {
309: // setting code context, would execute in ^switch[...]{>>context<<}
1.105 paf 310: //selected_code->get_junction()->change_context(cases_code.get_junction());
1.107 paf 311: r.write_pass_lang(r.process(*selected_code));
1.83 paf 312: }
1.28 parser 313: }
314:
1.127.2.7 paf 315: static void _case(Request& r, StringPtr method_name, MethodParams& params) {
1.38 parser 316: Pool& pool=r.pool();
317:
318: Switch_data *data=static_cast<Switch_data *>(r.classes_conf.get(*switch_data_name));
319: if(!data)
1.78 paf 320: throw Exception("parser.runtime",
1.38 parser 321: &method_name,
322: "without switch");
1.28 parser 323:
1.127.2.7 paf 324: int count=params.count();
325: Value *code=¶ms.as_junction(--count, "case result must be code");
1.83 paf 326:
327: // killing context for safety, would execute in ^switch[...]{>>context<<}
328: // reason: context is stacked, and it would become invalid afterwards
1.105 paf 329: //code->get_junction()->change_context(0);
1.83 paf 330:
1.28 parser 331: for(int i=0; i<count; i++) {
1.127.2.7 paf 332: Value& value=r.process_to_value(params.get(i));
1.28 parser 333:
1.82 paf 334: if(value.as_string() == CASE_DEFAULT_VALUE) {
1.38 parser 335: data->_default=code;
1.28 parser 336: break;
337: }
338:
339: bool matches;
1.38 parser 340: if(data->searching->is_string())
341: matches=data->searching->as_string() == value.as_string();
1.28 parser 342: else
1.38 parser 343: matches=data->searching->as_double() == value.as_double();
1.28 parser 344:
345: if(matches) {
1.82 paf 346: if(data->found)
347: throw Exception("parser.runtime",
348: &method_name,
349: "duplicate found");
350:
1.38 parser 351: data->found=code;
1.28 parser 352: break;
353: }
354: }
355: }
356:
1.63 paf 357: // cache--
358:
359: // consts
360:
1.127.2.2 paf 361: const int DATA_STRING_SERIALIZED_VERSION=0x0003;
1.63 paf 362:
363: // helper types
364:
365: #ifndef DOXYGEN
366: struct Data_string_serialized_prolog {
367: int version;
1.79 paf 368: time_t expires;
1.63 paf 369: };
370: #endif
371:
1.68 paf 372: void cache_delete(const String& file_spec) {
373: file_delete(file_spec, false/*fail_on_read_problem*/);
1.63 paf 374: }
1.69 paf 375:
376: #ifndef DOXYGEN
1.79 paf 377: struct Cache_data {
378: time_t expires;
379: };
1.69 paf 380: struct Locked_process_and_cache_put_action_info {
381: Request *r;
1.79 paf 382: Cache_data *data;
1.81 paf 383: Value *body_code; const String *evaluated_body;
1.69 paf 384: };
385: #endif
1.127.2.2 paf 386: /* @todo maybe network order worth spending some effort?
387: don't bothering myself with network byte order,
388: am not planning to be able to move resulting file across platforms
389: */
1.69 paf 390: static void locked_process_and_cache_put_action(int f, void *context) {
391: Locked_process_and_cache_put_action_info& info=
392: *static_cast<Locked_process_and_cache_put_action_info *>(context);
393:
394: // body->process
1.81 paf 395: info.evaluated_body=&info.r->process_to_string(*info.body_code);
1.69 paf 396:
1.79 paf 397: // expiration time not spoiled by ^cache(0) or something?
398: if(info.data->expires > time(0)) {
399: // string -serialize> buffer
400: void *data; size_t data_size;
1.81 paf 401: info.evaluated_body->serialize(
1.79 paf 402: sizeof(Data_string_serialized_prolog),
403: data, data_size);
404: Data_string_serialized_prolog& prolog=
405: *static_cast<Data_string_serialized_prolog *>(data);
406: prolog.version=DATA_STRING_SERIALIZED_VERSION;
407: prolog.expires=info.data->expires;
408:
409: // buffer -write> file
410: write(f, data, data_size);
411: } else // expired!
412: info.data->expires=0; // flag it so that could be easily checked by caller
1.69 paf 413: }
1.81 paf 414: const String *locked_process_and_cache_put(Request& r,
1.69 paf 415: Value& body_code,
1.79 paf 416: Cache_data& data,
1.69 paf 417: const String& file_spec) {
418: Locked_process_and_cache_put_action_info info={
419: &r,
1.81 paf 420: &data,
421: &body_code
1.69 paf 422: };
423:
1.81 paf 424: const String *result=file_write_action_under_lock(
1.69 paf 425: file_spec,
426: "cache_put", locked_process_and_cache_put_action, &info,
427: false/*as_text*/,
428: false/*do_append*/,
1.96 paf 429: false/*block*/,
430: false/*fail on lock problem*/) ? info.evaluated_body: 0;
1.100 paf 431: time_t now=time(0);
432: if(data.expires<=now)
1.79 paf 433: cache_delete(file_spec);
434: return result;
1.63 paf 435: }
1.79 paf 436: String *cache_get(Pool& pool, const String& file_spec, time_t now) {
1.63 paf 437: void* data; size_t data_size;
1.72 paf 438: if(file_read(pool, file_spec,
1.63 paf 439: data, data_size,
440: false/*as_text*/,
1.126 paf 441: 0, 0, //no params&out_fields
1.69 paf 442: false/*fail_on_read_problem*/)
1.72 paf 443: && data_size/* ignore reads which are empty due to
444: non-unary open+lockEX conflict with lockSH */) {
1.63 paf 445:
1.72 paf 446: Data_string_serialized_prolog& prolog=
447: *static_cast<Data_string_serialized_prolog *>(data);
1.63 paf 448:
1.72 paf 449: String *result=new(pool) String(pool);
450: if(
451: data_size>=sizeof(Data_string_serialized_prolog)
452: && prolog.version==DATA_STRING_SERIALIZED_VERSION
1.79 paf 453: && prolog.expires > now
1.72 paf 454: && result->deserialize(
455: sizeof(Data_string_serialized_prolog), data, data_size, file_spec.cstr()))
456: return result;
457: }
1.63 paf 458:
1.72 paf 459: return 0;
1.63 paf 460: }
1.127.2.7 paf 461: static time_t as_expires(Request& r, StringPtr method_name, MethodParams& params,
1.79 paf 462: int index, time_t now) {
463: time_t result;
1.127.2.7 paf 464: Value& vlifespan_or_expires=params.get(index);
1.104 paf 465: if(Value *vdate=vlifespan_or_expires.as(VDATE_TYPE, false))
466: result=static_cast<VDate *>(vdate)->get_time();
1.79 paf 467: else
1.127.2.7 paf 468: result=now+(time_t)params.as_double(index, "lifespan must be date or number", r);
1.79 paf 469:
470: return result;
471: }
472: static const String as_file_spec(Request&r, MethodParams *params, int index) {
1.127.2.7 paf 473: return r.absolute(params.as_string(index, "filespec must be string"));
1.79 paf 474: }
1.127.2.7 paf 475: static void _cache(Request& r, StringPtr method_name, MethodParams& params) {
1.63 paf 476: Pool& pool=r.pool();
1.79 paf 477: time_t now=time(0);
478:
479: // ^cache[filename] ^cache(seconds) ^cache[expires date]
1.127.2.7 paf 480: if(params.count()==1) {
481: if(params.get(0).is_string()) { // filename?
1.79 paf 482: cache_delete(as_file_spec(r, params, 0));
483: return;
484: }
485:
486: // secods|expires date
487: Cache_data *data=static_cast<Cache_data *>(r.classes_conf.get(*cache_data_name));
488: if(!data)
489: throw Exception("parser.runtime",
490: &method_name,
491: "expire-time reducing instruction without cache");
492:
493: time_t expires=as_expires(r, method_name, params, 0, now);
494: if(expires < data->expires)
495: data->expires=expires;
496:
497: return;
498: }
1.63 paf 499:
500: // file_spec, expires, body code
1.127.2.7 paf 501: const String &file_spec=r.absolute(params.as_string(0, "filespec must be string"));
1.65 paf 502:
1.79 paf 503: Cache_data data;
504: Temp_hash_value cache_data_setter(r.classes_conf, *cache_data_name, &data);
505: data.expires=as_expires(r, method_name, params, 1, now);
1.127.2.7 paf 506: Value& body_code=params.as_junction(2, "body must be code");
1.63 paf 507:
1.79 paf 508: if(data.expires>now) { // valid 'expires' specified? try cached copy...
1.69 paf 509: // hence we don't hope to have unary create/lockEX
510: // we need some plan to live in a life like that, so...
511: // worst races plan:
512: // A B
513: // open
514: // |open
515: // lockSH
516: // |nonblocking-lockEX fails
517: // unlockSH
518: // close, cache_get returns 0
519: // open
520: // nonblocking-lockEX succeeds; process, write, close
521: // |retry1: open
522: // ...
523: // |lockSH succeeds; ...
524:
525: for(int retry=0; retry<2; retry++) {
1.79 paf 526: if(String *cached_body=cache_get(pool, file_spec, now)) { // have cached copy?
527: // write it out
528: r.write_assign_lang(*cached_body);
529: // happy with it
530: return;
531: }
1.69 paf 532:
533: // non-blocked lock; process; cache it
1.81 paf 534: if(const String*processed_body=
535: locked_process_and_cache_put(r, body_code, data, file_spec)) {
1.63 paf 536: // write it out
1.69 paf 537: r.write_assign_lang(*processed_body);
1.63 paf 538: // happy with it
539: return;
1.69 paf 540: } else { // somebody writing result right now
541: pa_sleep(0, 500000); // waiting half a second
542: retry=0; // prolonging our wait, than could cache_get it, without processing body_code
1.63 paf 543: }
1.69 paf 544: }
1.78 paf 545: throw Exception(0,
1.69 paf 546: &file_spec,
547: "locking problem");
548: } else {
1.79 paf 549: // instructed not to cache; forget cached copy
1.68 paf 550: cache_delete(file_spec);
1.69 paf 551: // process
1.81 paf 552: const String& processed_body=r.process_to_string(body_code);
1.69 paf 553: // write it out
554: r.write_assign_lang(processed_body);
555: // happy with it
556: return;
557: }
558: // never reached
1.63 paf 559: }
560:
1.74 paf 561: // also used in pa_request.C to pass param to @unhandled_exception
1.127.2.6 paf 562: VHashPtr exception2vhash(const Exception& e) {
563: VHashPtr result(new VHash));
1.74 paf 564: Hash& hash=result.hash(0);
1.127.2.5 paf 565: if(const char* type=e.type(true))
1.78 paf 566: hash.put(*exception_type_part_name, new(pool) VString(*new(pool) String(pool, type)));
1.76 paf 567: if(const String *asource=e.problem_source()) {
568: String& source=*new(pool) String(pool);
569: source.append(*asource, String::UL_TAINTED, true/*forced*/);
1.74 paf 570:
1.76 paf 571: hash.put(*exception_source_part_name, new(pool) VString(source));
1.74 paf 572: #ifndef NO_STRING_ORIGIN
1.76 paf 573: const Origin& origin=source.origin();
1.89 paf 574: hash.put(*new(pool) String(pool, "file", 0, true),
1.74 paf 575: new(pool) VString(*new(pool) String(pool, origin.file)));
576: hash.put(*new(pool) String(pool, "lineno"),
577: new(pool) VInt(pool, 1+origin.line));
578: #endif
579: }
1.127.2.5 paf 580: if(const char* ecomment=e.comment(true)) {
1.74 paf 581: int comment_size=strlen(ecomment);
582: char *pcomment=(char *)pool.malloc(comment_size);
583: memcpy(pcomment, ecomment, comment_size);
584: hash.put(*exception_comment_part_name,
1.76 paf 585: new(pool) VString(*new(pool) String(pool, pcomment, comment_size, true/*tainted*/)));
1.74 paf 586: }
587: hash.put(*exception_handled_part_name,
588: new(pool) VBool(pool, false));
589:
590: return result;
591: }
592:
1.127.2.7 paf 593: static void _try_operator(Request& r, StringPtr method_name, MethodParams& params) {
1.74 paf 594: Pool& pool=r.pool();
595:
1.127.2.7 paf 596: Value& body_code=params.as_junction(0, "body_code must be code");
597: Value& catch_code=params.as_junction(1, "catch_code must be code");
1.74 paf 598:
1.86 paf 599: StringOrValue result;
1.123 paf 600: // taking snapshot of try-context
601: Request_context_saver try_context(r);
1.74 paf 602: try {
1.86 paf 603: result=r.process(body_code);
1.74 paf 604: } catch(const Exception& e) {
1.123 paf 605: Request_context_saver throw_context(r); // taking snapshot of throw-context [stack trace contains error]
606: try_context.restore(); // restoring try-context to perform catch-code
607:
1.127.2.6 paf 608: VHashPtr vhash=exception2vhash(pool, e);
1.74 paf 609:
610: Junction *junction=catch_code.get_junction();
1.105 paf 611: Value *method_frame=junction->method_frame;
1.125 paf 612: Value *saved_exception_var_value=method_frame->get_element(*exception_var_name, *method_frame, false);
1.105 paf 613: junction->method_frame->put_element(*exception_var_name, &vhash, false);
1.86 paf 614: result=r.process(catch_code);
1.74 paf 615: bool handled=false;
616: if(Value *value=static_cast<Value *>(vhash.hash(0).get(*exception_handled_part_name)))
617: handled=value->as_bool();
1.105 paf 618: junction->method_frame->put_element(*exception_var_name, saved_exception_var_value, false);
1.74 paf 619:
1.123 paf 620: if(!handled) {
621: throw_context.restore(); // restoring throw-context [exception were not handled]
1.74 paf 622: throw(e); // rethrow
1.123 paf 623: }
1.74 paf 624: }
1.123 paf 625: // write out result
1.86 paf 626: r.write_pass_lang(result);
1.74 paf 627: }
628:
1.127.2.7 paf 629: static void _throw_operator(Request& r, StringPtr method_name, MethodParams& params) {
1.74 paf 630: Pool& pool=r.pool();
631:
1.127.2.7 paf 632: if(params.count()==1) {
633: Value& param0=params.get(0);
1.74 paf 634: if(Hash *hash=param0.get_hash(&method_name)) {
1.127.2.5 paf 635: const char* type=0;
1.74 paf 636: if(Value *value=static_cast<Value *>(hash->get(*exception_type_part_name)))
1.78 paf 637: type=value->as_string().cstr();
1.74 paf 638: const String *source=0;
639: if(Value *value=static_cast<Value *>(hash->get(*exception_source_part_name)))
640: source=&value->as_string();
1.127.2.5 paf 641: const char* comment=0;
1.74 paf 642: if(Value *value=
643: static_cast<Value *>(hash->get(*exception_comment_part_name)))
644: comment=value->as_string().cstr();
645:
1.78 paf 646: throw Exception(type,
1.74 paf 647: source?source:&method_name,
648: comment);
649: } else
1.78 paf 650: throw Exception("parser.runtime",
1.74 paf 651: &method_name,
652: "one-param version has hash param");
653: } else {
1.127.2.7 paf 654: const char* type=params.as_string(0, "type must be string").cstr();
655: const String& source=params.as_string(1, "source must be string");
656: const char* comment=params.count()>2?params.as_string(2, "comment must be string").cstr():0;
1.97 paf 657: throw Exception(type, &source, "%s", comment?comment:"");
1.74 paf 658: }
659: }
660:
1.10 paf 661: // constructor
662:
1.113 paf 663: VClassMAIN::VClassMAIN(Pool& apool): VClass(apool) {
1.121 paf 664: set_name(*NEW String(pool(), MAIN_CLASS_NAME));
665:
1.1 paf 666: // ^if(condition){code-when-true}
667: // ^if(condition){code-when-true}{code-when-false}
1.10 paf 668: add_native_method("if", Method::CT_ANY, _if, 2, 3);
1.1 paf 669:
670: // ^untaint[as-is|uri|sql|js|html|html-typo]{code}
1.59 paf 671: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2);
1.1 paf 672:
673: // ^taint[as-is|uri|sql|js|html|html-typo]{code}
1.10 paf 674: add_native_method("taint", Method::CT_ANY, _taint, 1, 2);
1.1 paf 675:
676: // ^process[code]
1.116 paf 677: add_native_method("process", Method::CT_ANY, _process, 1, 2);
1.1 paf 678:
679: // ^rem{code}
1.51 parser 680: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000);
1.1 paf 681:
682: // ^while(condition){code}
1.10 paf 683: add_native_method("while", Method::CT_ANY, _while, 2, 2);
1.1 paf 684:
685: // ^use[file]
1.10 paf 686: add_native_method("use", Method::CT_ANY, _use, 1, 1);
1.1 paf 687:
1.54 paf 688: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.10 paf 689: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1);
1.1 paf 690:
691: // ^eval(expr)
692: // ^eval(expr)[format]
1.10 paf 693: add_native_method("eval", Method::CT_ANY, _eval, 1, 2);
1.52 parser 694:
1.1 paf 695: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 696: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
697:
1.63 paf 698:
1.65 paf 699: // ^cache[file_spec] delete cache
1.63 paf 700: // ^cache[file_spec](time){code} time=0 no cache
1.65 paf 701: add_native_method("cache", Method::CT_ANY, _cache, 1, 3);
1.63 paf 702:
1.28 parser 703: // switch
704:
705: // ^switch[value]{cases}
706: add_native_method("switch", Method::CT_ANY, _switch, 2, 2);
707:
708: // ^case[value]{code}
1.51 parser 709: add_native_method("case", Method::CT_ANY, _case, 2, 10000);
1.74 paf 710:
711: // try-catch
712:
713: // ^try{code}{catch code}
714: add_native_method("try", Method::CT_ANY, _try_operator, 2, 2);
715: // ^throw[$exception hash]
716: // ^throw[type;source;comment]
717: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
718:
1.10 paf 719: }
1.11 paf 720:
721: // constructor & configurator
1.1 paf 722:
1.127.2.4 paf 723: VStateless_classPtr VClassMAIN_create() {
1.127.2.1 paf 724: #define ULN(name, LANG) \
1.127.2.3 paf 725: untaint_lang_name2enum.put(StringPtr(new String(name)), (int)String::UL_##LANG);
726: ULN("as-is", AS_IS);
727: ULN("optimized-as-is", AS_IS|String::UL_OPTIMIZE_BIT);
728: ULN("file-spec", FILE_SPEC);
729: ULN("http-header", HTTP_HEADER);
730: ULN("mail-header", MAIL_HEADER);
731: ULN("uri", URI);
732: ULN("table", TABLE);
733: ULN("sql", SQL);
734: ULN("js", JS);
735: ULN("xml", XML);
736: ULN("optimized-xml", XML|String::UL_OPTIMIZE_BIT);
737: ULN("html", HTML);
738: ULN("optimized-html", HTML|String::UL_OPTIMIZE_BIT);
1.127.2.1 paf 739: #undef ULN
740:
1.127.2.4 paf 741: return VStateless_classPtr(new VClassMAIN);
1.1 paf 742: }
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