Annotation of parser3/src/classes/op.C, revision 1.127.2.22.2.25
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:
1.127.2.22.2. 5(paf 8:3): static const char* IDENT_OP_C="$Date: 2003/04/03 06:54:27 $";
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"
1.127.2.21 paf 19: #include "pa_vclass.h"
1.1 paf 20:
1.18 parser 21: // limits
22:
23: #define MAX_LOOPS 10000
24:
1.10 paf 25: // defines
26:
1.82 paf 27: #define CASE_DEFAULT_VALUE "DEFAULT"
1.11 paf 28:
1.10 paf 29: // class
30:
1.113 paf 31: class VClassMAIN: public VClass {
1.10 paf 32: public:
1.127.2.10 paf 33: VClassMAIN();
1.10 paf 34: };
35:
1.127.2.10 paf 36: // defines for statics
37:
38: #define SWITCH_DATA_NAME "SWITCH-DATA"
39: #define CACHE_DATA_NAME "CACHE-DATA"
40: #define EXCEPTION_VAR_NAME "exception"
41:
42: // statics
43:
44: //^switch ^case
1.127.2.22.2. 3(paf 45:3): static const String switch_data_name(SWITCH_DATA_NAME);
1.127.2.10 paf 46: //^cache
1.127.2.22.2. 3(paf 47:3): static const String cache_data_name(CACHE_DATA_NAME);
1.127.2.10 paf 48:
1.127.2.22.2. 3(paf 49:3): static const String exception_var_name(EXCEPTION_VAR_NAME);
1.127.2.10 paf 50:
1.127.2.1 paf 51: // helpers
52:
1.127.2.22.2. 6(paf 53:3): class Untaint_lang_name2enum: public Hash<const StringBody, String::Language> {
1.127.2.10 paf 54: public:
55: Untaint_lang_name2enum() {
56: #define ULN(name, LANG) \
1.127.2.22.2. 4(paf 57:3): put(StringBody(name), (value_type)(String::L_##LANG));
1.127.2.10 paf 58: ULN("as-is", AS_IS);
1.127.2.22.2. (paf 59:): ULN("optimized-as-is", AS_IS|String::L_OPTIMIZE_BIT);
1.127.2.10 paf 60: ULN("file-spec", FILE_SPEC);
61: ULN("http-header", HTTP_HEADER);
62: ULN("mail-header", MAIL_HEADER);
63: ULN("uri", URI);
64: ULN("table", TABLE);
65: ULN("sql", SQL);
66: ULN("js", JS);
67: ULN("xml", XML);
1.127.2.22.2. (paf 68:): ULN("optimized-xml", XML|String::L_OPTIMIZE_BIT);
1.127.2.10 paf 69: ULN("html", HTML);
1.127.2.22.2. (paf 70:): ULN("optimized-html", HTML|String::L_OPTIMIZE_BIT);
1.127.2.10 paf 71: #undef ULN
72: }
73: } untaint_lang_name2enum;
1.127.2.1 paf 74:
1.10 paf 75: // methods
76:
1.127.2.22.2. 4(paf 77:3): static void _if(Request& r, MethodParams* params) {
3(paf 78:3): Value& condition_code=params->as_junction(0, "condition must be expression");
1.1 paf 79:
1.81 paf 80: bool condition=r.process_to_value(condition_code,
1.83 paf 81: /*0/*no name* /,*/
1.127.2.22.2. 4(paf 82:3): false/*don't intercept string*/).as_bool();
1.6 paf 83: if(condition)
1.127.2.13 paf 84: r.write_pass_lang(r.process(params->as_junction(1, "'then' parameter must be code")));
85: else if(params->count()>2)
86: r.write_pass_lang(r.process(params->as_junction(2, "'else' parameter must be code")));
1.1 paf 87: }
88:
1.127.2.22.2. 2(paf 89:3): static void _untaint(Request& r, MethodParams* params) {
1.1 paf 90:
1.127.2.22.2. 4(paf 91:3): String::Language lang;
1.127.2.13 paf 92: if(params->count()==1)
1.127.2.22.2. (paf 93:): lang=String::L_AS_IS; // mark as simply 'tainted'. useful in html from sql
1.59 paf 94: else {
1.127.2.22.2. (paf 95:): const String& lang_name=params->as_string(0, "lang must be string");
1.127.2.10 paf 96: lang=untaint_lang_name2enum.get(lang_name);
1.59 paf 97: if(!lang)
1.78 paf 98: throw Exception(0,
1.127.2.22.2. 4(paf 99:3): &lang_name,
1.59 paf 100: "invalid taint language");
101: }
1.1 paf 102:
103: {
1.127.2.22.2. 4(paf 104:3): Value& vbody=params->as_junction(params->count()-1, "body must be code");
1.1 paf 105:
106: Temp_lang temp_lang(r, lang); // set temporarily specified ^untaint[language;
1.86 paf 107: r.write_pass_lang(r.process(vbody)); // process marking tainted with that lang
1.1 paf 108: }
109: }
110:
1.127.2.22.2. 4(paf 111:3): static void _taint(Request& r, MethodParams* params) {
112:3): String::Language lang;
1.127.2.13 paf 113: if(params->count()==1)
1.127.2.22.2. (paf 114:): lang=String::L_TAINTED; // mark as simply 'tainted'. useful in table:set
1.1 paf 115: else {
1.127.2.22.2. (paf 116:): const String& lang_name=params->as_string(0, "lang must be string");
1.127.2.10 paf 117: lang=untaint_lang_name2enum.get(lang_name);
1.1 paf 118: if(!lang)
1.78 paf 119: throw Exception(0,
1.127.2.22.2. 4(paf 120:3): &lang_name,
1.3 paf 121: "invalid taint language");
1.1 paf 122: }
123:
124: {
1.127.2.22.2. 4(paf 125:3): Value& vbody=params->as_no_junction(params->count()-1, "body must not be code");
1.1 paf 126:
1.127.2.10 paf 127: String result;
1.1 paf 128: result.append(
1.127.2.22.2. 4(paf 129:3): vbody.as_string(), // process marking tainted with that lang
1.1 paf 130: lang, true); // force result language to specified
131: r.write_pass_lang(result);
132: }
133: }
134:
1.127.2.22.2. 2(paf 135:3): static void _process(Request& r, MethodParams* params) {
(paf 136:): Method* main_method;
4(paf 137:3): Value& target_self=params->count()>1?
1.127.2.13 paf 138: params->as_no_junction(0, "target must not be code")
1.127.2.22.2. 4(paf 139:3): :r.get_method_frame()->caller()->self();
1.1 paf 140: {
1.127.2.22.2. 4(paf 141:3): Value& vjunction=params->as_junction(params->count()-1, "body must be code");
1.114 paf 142:
1.127.2.22.2. 4(paf 143:3): VStateless_class *target_class=target_self.get_last_derived_class();
1.116 paf 144: if(!target_class)
145: throw Exception("parser.runtime",
1.127.2.22.2. 4(paf 146:3): 0,
1.116 paf 147: "no target class");
148:
1.114 paf 149: // evaluate source to process
1.127.2.22.2. 4(paf 150:3): const String& source=r.process_to_string(vjunction);
1.114 paf 151:
1.73 paf 152: // temporary remove language change
1.127.2.22.2. (paf 153:): Temp_lang temp_lang(r, String::L_PASS_APPENDED);
1.1 paf 154: // temporary zero @main so to maybe-replace it in processed code
1.127.2.22.2. 4(paf 155:3): Temp_method temp_method_main(*target_class, main_method_name, 0);
1.1 paf 156: // temporary zero @auto so it wouldn't be auto-called in Request::use_buf
1.127.2.22.2. 4(paf 157:3): Temp_method temp_method_auto(*target_class, auto_method_name, 0);
158:3): #ifdef LATER
1.101 paf 159: // calculate pseudo file name of processed chars
160: // would be something like "/some/file(4) process"
161: char local_place[MAX_STRING];
162: #ifndef NO_STRING_ORIGIN
1.127.2.10 paf 163: const String_fragment::Origin& source_origin=source->origin();
164: const String_fragment::Origin& method_origin=method_name->origin();
1.101 paf 165: size_t place_size;
166: if(source_origin.file==method_origin.file)
167: place_size=snprintf(local_place, MAX_STRING, "%s(%d) %s", // same file
168: source_origin.file?source_origin.file:"unknown_file", 1+source_origin.line,
1.127.2.14 paf 169: method_name->cstr().get())+1;
1.101 paf 170: else // different files ^process{external__file_text__or__sql}
171: place_size=snprintf(local_place, MAX_STRING, "%s",
172: source_origin.file?source_origin.file:"unknown_file")+1;
173: #else
1.127.2.9 paf 174: strncpy(local_place, method_name->cstr(), MAX_STRING-1); place[MAX_STRING-1]=0;
1.101 paf 175: size_t place_size=strlen(local_place)+1;
176: #endif
1.127.2.12 paf 177: char *heap_place=pool.copy(local_place, place_size);
1.127.2.22.2. 4(paf 178:3): #endif
1.1 paf 179: // process source code, append processed methods to 'self' class
180: // maybe-define new @main
1.116 paf 181: r.use_buf(*target_class,
1.127.2.22.2. 8(paf 182:3): source.cstr(String::L_UNSPECIFIED, r.connection(false)),
2(paf 183:3): 0); // later! *new String("later"), //new String(heap_place, place_size, true /*tainted*/),
1.1 paf 184:
1.73 paf 185: // main_method
1.127.2.10 paf 186: main_method=target_class->get_method(main_method_name);
1.73 paf 187: }
188: // after restoring current-request-lang
189: // maybe-execute @main[]
190: if(main_method) {
1.119 paf 191: // temporarily set method_frame's self to target_self
192: Temp_method_frame_self tmfs(*r.get_method_frame(), target_self);
1.73 paf 193: // execute!
194: r.execute(*main_method->parser_code);
1.1 paf 195: }
196: }
197:
1.127.2.22.2. 4(paf 198:3): static void _rem(Request& r, MethodParams* params) {
1.127.2.13 paf 199: params->as_junction(0, "body must be code");
1.1 paf 200: }
201:
1.127.2.22.2. 2(paf 202:3): static void _while(Request& r, MethodParams* params) {
4(paf 203:3): Value& vcondition=params->as_junction(0, "condition must be expression");
204:3): Value& body=params->as_junction(1, "body must be code");
1.1 paf 205:
206: // while...
207: int endless_loop_count=0;
208: while(true) {
1.18 parser 209: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
1.78 paf 210: throw Exception("parser.runtime",
1.127.2.22.2. 4(paf 211:3): 0,
1.1 paf 212: "endless loop detected");
213:
1.86 paf 214: bool condition=r.process_to_value(vcondition,
1.83 paf 215: /*0/*no name* /,*/
1.127.2.22.2. 4(paf 216:3): false/*don't intercept string*/).as_bool();
1.1 paf 217: if(!condition) // ...condition is true
218: break;
219:
220: // write processed body
1.86 paf 221: r.write_pass_lang(r.process(body));
1.1 paf 222: }
223: }
224:
1.127.2.22.2. 2(paf 225:3): static void _use(Request& r, MethodParams* params) {
4(paf 226:3): Value& vfile=params->as_no_junction(0, "file name must not be code");
227:3): r.use_file(r.main_class, vfile.as_string());
1.1 paf 228: }
229:
1.127.2.22.2. 2(paf 230:3): static void _for(Request& r, MethodParams* params) {
(paf 231:): const String& var_name=params->as_string(0, "var name must be string");
1.127.2.13 paf 232: int from=params->as_int(1, "from must be int", r);
233: int to=params->as_int(2, "to must be int", r);
1.127.2.22.2. 4(paf 234:3): Value& body_code=params->as_junction(3, "body must be code");
(paf 235:): Value* delim_maybe_code=params->count()>4?(*params)[4]:0;
1.1 paf 236:
1.57 paf 237: if(to-from>=MAX_LOOPS) // too long loop?
1.78 paf 238: throw Exception("parser.runtime",
1.127.2.22.2. 4(paf 239:3): 0,
1.57 paf 240: "endless loop detected");
241:
1.1 paf 242: bool need_delim=false;
1.127.2.22.2. 4(paf 243:3): VInt* vint=new VInt(0);
1.117 paf 244: r.get_method_frame()->caller()->put_element(var_name, vint, false);
1.1 paf 245: for(int i=from; i<=to; i++) {
246: vint->set_int(i);
247:
1.108 paf 248: StringOrValue sv_processed=r.process(body_code);
1.127.2.22.2. 4(paf 249:3): const String* s_processed=sv_processed.get_string();
(paf 250:): if(delim_maybe_code && s_processed && s_processed->length()) { // delimiter set and we have body
1.108 paf 251: if(need_delim) // need delim & iteration produced string?
1.127.2.22.2. 4(paf 252:3): r.write_pass_lang(r.process(*delim_maybe_code));
1.1 paf 253: need_delim=true;
254: }
1.108 paf 255: r.write_pass_lang(sv_processed);
1.1 paf 256: }
257: }
258:
1.127.2.22.2. 2(paf 259:3): static void _eval(Request& r, MethodParams* params) {
4(paf 260:3): Value& expr=params->as_junction(0, "need expression");
1.1 paf 261: // evaluate expresion
1.127.2.22.2. 1(paf 262:3): Value& value_result=r.process_to_value(expr,
1.83 paf 263: /*0/*no name YET* /,*/
1.127.2.22.2. 4(paf 264:3): true/*don't intercept string*/).as_expr_result();
1.127.2.13 paf 265: if(params->count()>1) {
1.127.2.22.2. 4(paf 266:3): Value& fmt=params->as_no_junction(1, "fmt must not be code");
267:3): r.write_no_lang(String(format(value_result.as_double(), fmt.as_string().cstrm())));
1.91 paf 268: } else
1.127.2.10 paf 269: r.write_no_lang(value_result);
1.1 paf 270: }
271:
1.127.2.22.2. 2(paf 272:3): static void _connect(Request& r, MethodParams* params) {
1.63 paf 273: #ifdef RESOURCES_DEBUG
274: struct timeval mt[2];
275: #endif
1.127.2.22.2. 4(paf 276:3): Value& url=params->as_no_junction(0, "url must not be code");
277:3): Value& body_code=params->as_junction(1, "body must be code");
1.1 paf 278:
1.127.2.10 paf 279: Table* protocol2driver_and_client=0;
1.127.2.22.2. 4(paf 280:3): if(Value* sql=r.main_class.get_element(String(MAIN_SQL_NAME), r.main_class, false)) {
281:3): if(Value* element=sql->get_element(String(MAIN_SQL_DRIVERS_NAME), *sql, false)) {
1.113 paf 282: protocol2driver_and_client=element->get_table();
283: }
284: }
1.11 paf 285:
1.63 paf 286: #ifdef RESOURCES_DEBUG
287: //measure:before
288: gettimeofday(&mt[0],NULL);
289: #endif
1.1 paf 290: // connect
1.127.2.22.2. 4(paf 291:3): SQL_Connection* connection=SQL_driver_manager.get_connection(url.as_string(),
292:3): protocol2driver_and_client);
1.1 paf 293:
1.63 paf 294: #ifdef RESOURCES_DEBUG
295: //measure:after connect
296: gettimeofday(&mt[1],NULL);
297:
298: double t[2];
299: for(int i=0;i<2;i++)
300: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
301:
302: r.sql_connect_time+=t[1]-t[0];
303: #endif
1.127.2.22.2. 4(paf 304:3): Temp_connection temp_connection(r, connection);
1.1 paf 305: // execute body
1.53 parser 306: try {
1.86 paf 307: r.write_assign_lang(r.process(body_code));
1.75 paf 308: } catch(...) { // process problem
1.67 paf 309: connection->mark_to_rollback();
1.127.2.6 paf 310: rethrow;
1.1 paf 311: }
312: }
313:
1.41 parser 314: #ifndef DOXYGEN
1.127.2.10 paf 315: class Switch_data: public PA_Object {
316: public:
317: Request& r;
1.127.2.22.2. 4(paf 318:3): Value& searching;
(paf 319:): Value* found;
320:): Value* _default;
1.127.2.10 paf 321: public:
1.127.2.22.2. 4(paf 322:3): Switch_data(Request& ar, Value& asearching):
1.127.2.10 paf 323: r(ar), searching(asearching) {}
1.28 parser 324: };
1.41 parser 325: #endif
1.127.2.22.2. 4(paf 326:3): static void _switch(Request& r, MethodParams* params) {
327:3): Switch_data* data=new Switch_data(r, r.process_to_value(*(*params)[0]));
5(paf 328:3): Temp_hash_value<const StringBody, PA_Object*>
1.127.2.10 paf 329: switch_data_setter(r.classes_conf, switch_data_name, data);
1.28 parser 330:
1.127.2.22.2. 4(paf 331:3): Value& cases_code=params->as_junction(1, "switch cases must be code");
1.82 paf 332: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
333: // because of stacked WWrapper used there as wcontext
1.84 paf 334: r.process(cases_code, true/*intercept_string*/);
1.127.2.22.2. (paf 335:): if(Value* selected_code=data->found? data->found: data->_default) {
1.83 paf 336: // setting code context, would execute in ^switch[...]{>>context<<}
1.105 paf 337: //selected_code->get_junction()->change_context(cases_code.get_junction());
1.127.2.22.2. 4(paf 338:3): r.write_pass_lang(r.process(*selected_code));
1.83 paf 339: }
1.28 parser 340: }
341:
1.127.2.22.2. 2(paf 342:3): static void _case(Request& r, MethodParams* params) {
4(paf 343:3): Switch_data* data=static_cast<Switch_data*>(r.classes_conf.get(switch_data_name));
1.38 parser 344: if(!data)
1.78 paf 345: throw Exception("parser.runtime",
1.127.2.22.2. 4(paf 346:3): 0,
1.38 parser 347: "without switch");
1.28 parser 348:
1.127.2.13 paf 349: int count=params->count();
1.127.2.22.2. 4(paf 350:3): Value& code=params->as_junction(--count, "case result must be code");
1.83 paf 351:
352: // killing context for safety, would execute in ^switch[...]{>>context<<}
353: // reason: context is stacked, and it would become invalid afterwards
1.105 paf 354: //code->get_junction()->change_context(0);
1.83 paf 355:
1.28 parser 356: for(int i=0; i<count; i++) {
1.127.2.22.2. 4(paf 357:3): Value& value=r.process_to_value(*(*params)[i]);
1.28 parser 358:
1.127.2.22.2. 4(paf 359:3): if(value.as_string() == CASE_DEFAULT_VALUE) {
360:3): data->_default=&code;
1.28 parser 361: break;
362: }
363:
364: bool matches;
1.127.2.22.2. 4(paf 365:3): if(data->searching.is_string())
366:3): matches=data->searching.as_string() == value.as_string();
1.28 parser 367: else
1.127.2.22.2. 4(paf 368:3): matches=data->searching.as_double() == value.as_double();
1.28 parser 369:
370: if(matches) {
1.82 paf 371: if(data->found)
372: throw Exception("parser.runtime",
1.127.2.22.2. 4(paf 373:3): 0,
1.82 paf 374: "duplicate found");
375:
1.127.2.22.2. 4(paf 376:3): data->found=&code;
1.28 parser 377: break;
378: }
379: }
380: }
381:
1.63 paf 382: // cache--
383:
384: // consts
385:
1.127.2.22.2. (paf 386:): const int DATA_STRING_SERIALIZED_VERSION=0x0004;
1.63 paf 387:
388: // helper types
389:
390: #ifndef DOXYGEN
391: struct Data_string_serialized_prolog {
392: int version;
1.79 paf 393: time_t expires;
1.63 paf 394: };
395: #endif
396:
1.127.2.22.2. (paf 397:): void cache_delete(const String& file_spec) {
1.68 paf 398: file_delete(file_spec, false/*fail_on_read_problem*/);
1.63 paf 399: }
1.69 paf 400:
401: #ifndef DOXYGEN
1.127.2.10 paf 402: class Cache_data: public PA_Object {
403: public:
1.79 paf 404: time_t expires;
405: };
1.69 paf 406: struct Locked_process_and_cache_put_action_info {
407: Request *r;
1.79 paf 408: Cache_data *data;
1.127.2.22.2. 4(paf 409:3): Value* body_code; const String* evaluated_body;
1.69 paf 410: };
411: #endif
1.127.2.2 paf 412: /* @todo maybe network order worth spending some effort?
413: don't bothering myself with network byte order,
414: am not planning to be able to move resulting file across platforms
415: */
1.69 paf 416: static void locked_process_and_cache_put_action(int f, void *context) {
417: Locked_process_and_cache_put_action_info& info=
418: *static_cast<Locked_process_and_cache_put_action_info *>(context);
1.127.2.10 paf 419:
1.69 paf 420: // body->process
1.127.2.22.2. 4(paf 421:3): info.evaluated_body=&info.r->process_to_string(*info.body_code);
1.69 paf 422:
1.79 paf 423: // expiration time not spoiled by ^cache(0) or something?
424: if(info.data->expires > time(0)) {
425: // string -serialize> buffer
1.127.2.22.2. 4(paf 426:3): String::C serialized=info.evaluated_body->serialize(
427:3): sizeof(Data_string_serialized_prolog));
1.79 paf 428: Data_string_serialized_prolog& prolog=
1.127.2.22.2. 4(paf 429:3): *reinterpret_cast<Data_string_serialized_prolog *>(serialized.str);
1.79 paf 430: prolog.version=DATA_STRING_SERIALIZED_VERSION;
431: prolog.expires=info.data->expires;
432:
433: // buffer -write> file
1.127.2.22.2. 4(paf 434:3): write(f, serialized.str, serialized.length);
1.79 paf 435: } else // expired!
436: info.data->expires=0; // flag it so that could be easily checked by caller
1.69 paf 437: }
1.127.2.22.2. 4(paf 438:3): const String* locked_process_and_cache_put(Request& r,
439:3): Value& body_code,
440:3): Cache_data& data,
441:3): const String& file_spec) {
1.127.2.10 paf 442: Locked_process_and_cache_put_action_info info;
443: info.r=&r;
444: info.data=&data;
1.127.2.22.2. 4(paf 445:3): info.body_code=&body_code;
1.69 paf 446:
1.127.2.22.2. 4(paf 447:3): const String* result=file_write_action_under_lock(
1.69 paf 448: file_spec,
449: "cache_put", locked_process_and_cache_put_action, &info,
450: false/*as_text*/,
451: false/*do_append*/,
1.96 paf 452: false/*block*/,
1.127.2.22.2. (paf 453:): false/*fail on lock problem*/) ? info.evaluated_body: 0;
1.100 paf 454: time_t now=time(0);
455: if(data.expires<=now)
1.79 paf 456: cache_delete(file_spec);
457: return result;
1.63 paf 458: }
1.127.2.22.2. 4(paf 459:3): const String* cache_get(Charset& charset, const String& file_spec, time_t now) {
(paf 460:): File_read_result file=file_read(charset, file_spec,
1.63 paf 461: false/*as_text*/,
1.127.2.10 paf 462: 0, //no params
463: false/*fail_on_read_problem*/);
1.127.2.22.2. 4(paf 464:3): if(file.success && file.length/* ignore reads which are empty due to
1.72 paf 465: non-unary open+lockEX conflict with lockSH */) {
1.127.2.10 paf 466:
1.72 paf 467: Data_string_serialized_prolog& prolog=
1.127.2.22.2. 4(paf 468:3): *reinterpret_cast<Data_string_serialized_prolog *>(file.str);
1.63 paf 469:
1.127.2.22.2. 4(paf 470:3): String* result=new String;
1.72 paf 471: if(
1.127.2.22.2. 4(paf 472:3): file.length>=sizeof(Data_string_serialized_prolog)
1.72 paf 473: && prolog.version==DATA_STRING_SERIALIZED_VERSION
1.79 paf 474: && prolog.expires > now
1.127.2.22.2. 4(paf 475:3): && result->deserialize(sizeof(Data_string_serialized_prolog), file.str, file.length))
1.72 paf 476: return result;
477: }
1.63 paf 478:
1.127.2.22.2. (paf 479:): return 0;
1.63 paf 480: }
1.127.2.22.2. 2(paf 481:3): static time_t as_expires(Request& r, MethodParams* params,
1.79 paf 482: int index, time_t now) {
483: time_t result;
1.127.2.13 paf 484: if(Value* vdate=(*params)[index]->as(VDATE_TYPE, false))
1.127.2.10 paf 485: result=static_cast<VDate*>(vdate)->get_time();
1.79 paf 486: else
1.127.2.13 paf 487: result=now+(time_t)params->as_double(index, "lifespan must be date or number", r);
1.79 paf 488:
489: return result;
490: }
1.127.2.22.2. (paf 491:): static const String& as_file_spec(Request& r, MethodParams* params, int index) {
1.127.2.13 paf 492: return r.absolute(params->as_string(index, "filespec must be string"));
1.79 paf 493: }
1.127.2.22.2. 2(paf 494:3): static void _cache(Request& r, MethodParams* params) {
1.79 paf 495: time_t now=time(0);
496:
497: // ^cache[filename] ^cache(seconds) ^cache[expires date]
1.127.2.13 paf 498: if(params->count()==1) {
499: if((*params)[0]->is_string()) { // filename?
1.79 paf 500: cache_delete(as_file_spec(r, params, 0));
501: return;
502: }
503:
504: // secods|expires date
1.127.2.22.2. 4(paf 505:3): Cache_data* data=static_cast<Cache_data*>(r.classes_conf.get(cache_data_name));
1.79 paf 506: if(!data)
507: throw Exception("parser.runtime",
1.127.2.22.2. 4(paf 508:3): 0,
1.79 paf 509: "expire-time reducing instruction without cache");
510:
1.127.2.22.2. 4(paf 511:3): time_t expires=as_expires(r, params, 0, now);
1.79 paf 512: if(expires < data->expires)
513: data->expires=expires;
514:
515: return;
516: }
1.63 paf 517:
518: // file_spec, expires, body code
1.127.2.22.2. (paf 519:): const String& file_spec=r.absolute(params->as_string(0, "filespec must be string"));
1.65 paf 520:
1.127.2.22.2. 4(paf 521:3): Cache_data* data=new Cache_data;
5(paf 522:3): Temp_hash_value<const StringBody, PA_Object*>
1.127.2.10 paf 523: cache_data_setter(r.classes_conf, cache_data_name, data);
1.127.2.22.2. 4(paf 524:3): data->expires=as_expires(r, params, 1, now);
525:3): Value& body_code=params->as_junction(2, "body must be code");
1.63 paf 526:
1.127.2.10 paf 527: if(data->expires>now) { // valid 'expires' specified? try cached copy...
1.69 paf 528: // hence we don't hope to have unary create/lockEX
529: // we need some plan to live in a life like that, so...
530: // worst races plan:
531: // A B
532: // open
533: // |open
534: // lockSH
535: // |nonblocking-lockEX fails
536: // unlockSH
537: // close, cache_get returns 0
538: // open
539: // nonblocking-lockEX succeeds; process, write, close
540: // |retry1: open
541: // ...
542: // |lockSH succeeds; ...
543:
544: for(int retry=0; retry<2; retry++) {
1.127.2.22.2. 4(paf 545:3): if(const String* cached_body=cache_get(r.charsets.source(), file_spec, now)) { // have cached copy?
1.79 paf 546: // write it out
547: r.write_assign_lang(*cached_body);
548: // happy with it
549: return;
550: }
1.69 paf 551:
552: // non-blocked lock; process; cache it
1.127.2.22.2. 4(paf 553:3): if(const String* processed_body=
1.127.2.10 paf 554: locked_process_and_cache_put(r, body_code, *data, file_spec)) {
1.63 paf 555: // write it out
1.69 paf 556: r.write_assign_lang(*processed_body);
1.63 paf 557: // happy with it
558: return;
1.69 paf 559: } else { // somebody writing result right now
560: pa_sleep(0, 500000); // waiting half a second
561: retry=0; // prolonging our wait, than could cache_get it, without processing body_code
1.63 paf 562: }
1.69 paf 563: }
1.78 paf 564: throw Exception(0,
1.127.2.22.2. 4(paf 565:3): &file_spec,
1.69 paf 566: "locking problem");
567: } else {
1.79 paf 568: // instructed not to cache; forget cached copy
1.68 paf 569: cache_delete(file_spec);
1.69 paf 570: // process
1.127.2.22.2. (paf 571:): const String& processed_body=r.process_to_string(body_code);
1.69 paf 572: // write it out
1.127.2.22.2. 4(paf 573:3): r.write_assign_lang(processed_body);
1.69 paf 574: // happy with it
575: return;
576: }
577: // never reached
1.63 paf 578: }
579:
1.74 paf 580:
1.127.2.22.2. 5(paf 581:3):
582:3): // also used in pa_request.C to pass param to @unhandled_exception
1.74 paf 583:
1.127.2.22.2. 2(paf 584:3): static void _try_operator(Request& r, MethodParams* params) {
4(paf 585:3): Value& body_code=params->as_junction(0, "body_code must be code");
586:3): Value& catch_code=params->as_junction(1, "catch_code must be code");
1.74 paf 587:
1.86 paf 588: StringOrValue result;
1.123 paf 589: // taking snapshot of try-context
590: Request_context_saver try_context(r);
1.74 paf 591: try {
1.86 paf 592: result=r.process(body_code);
1.74 paf 593: } catch(const Exception& e) {
1.123 paf 594: Request_context_saver throw_context(r); // taking snapshot of throw-context [stack trace contains error]
595: try_context.restore(); // restoring try-context to perform catch-code
596:
1.127.2.22.2. 5(paf 597:3): Request::Exception_details details=r.get_details(e);
1.74 paf 598:
1.127.2.22.2. 4(paf 599:3): Junction* junction=catch_code.get_junction();
1.127.2.10 paf 600: Value* method_frame=junction->method_frame;
1.127.2.22.2. (paf 601:): Value* saved_exception_var_value=method_frame->get_element(exception_var_name, *method_frame, false);
5(paf 602:3): junction->method_frame->put_element(exception_var_name, &details.vhash, false);
1.86 paf 603: result=r.process(catch_code);
1.74 paf 604: bool handled=false;
1.127.2.22.2. (paf 605:): if(Value* value=
5(paf 606:3): details.vhash.hash().get(exception_handled_part_name))
1.74 paf 607: handled=value->as_bool();
1.127.2.10 paf 608: junction->method_frame->put_element(exception_var_name, saved_exception_var_value, false);
1.74 paf 609:
1.123 paf 610: if(!handled) {
611: throw_context.restore(); // restoring throw-context [exception were not handled]
1.127.2.22.2. 4(paf 612:3): rethrow;
613:3): }
1.74 paf 614: }
1.123 paf 615: // write out result
1.86 paf 616: r.write_pass_lang(result);
1.74 paf 617: }
618:
1.127.2.22.2. 2(paf 619:3): static void _throw_operator(Request& r, MethodParams* params) {
1.127.2.13 paf 620: if(params->count()==1) {
1.127.2.22.2. (paf 621:): Value* param0=(*params)[0];
2(paf 622:3): if(HashStringValue *hash=param0->get_hash()) {
1.127.2.5 paf 623: const char* type=0;
1.127.2.22.2. (paf 624:): if(Value* value=hash->get(exception_type_part_name))
625:): type=value->as_string().cstr();
4(paf 626:3): const String* source=0;
(paf 627:): if(Value* value=hash->get(exception_source_part_name))
4(paf 628:3): source=&value->as_string();
(paf 629:): const char* comment;
630:): if(Value* value=hash->get(exception_comment_part_name))
631:): comment=value->as_string().cstr();
1.74 paf 632:
1.78 paf 633: throw Exception(type,
1.127.2.22.2. 4(paf 634:3): source?source:0,
635:3): "%s", comment?comment:"");
1.74 paf 636: } else
1.78 paf 637: throw Exception("parser.runtime",
1.127.2.22.2. 4(paf 638:3): 0,
1.74 paf 639: "one-param version has hash param");
640: } else {
1.127.2.22.2. 4(paf 641:3): const char* type=params->as_string(0, "type must be string").cstr();
642:3): const String& source=params->as_string(1, "source must be string");
643:3): const char* comment=params->count()>2? params->as_string(2, "comment must be string").cstr()
1(paf 644:3): :0;
4(paf 645:3): throw Exception(type, &source, "%s", comment?comment:"");
1.74 paf 646: }
647: }
1.127.2.20 paf 648:
649: #if defined(WIN32) && defined(_DEBUG)
650: # define PA_BPT
1.127.2.22.2. 2(paf 651:3): static void _bpt(Request& r, MethodParams* params) {
1.127.2.20 paf 652: _asm int 3;
653: }
654: #endif
655:
1.10 paf 656: // constructor
657:
1.127.2.10 paf 658: VClassMAIN::VClassMAIN(): VClass() {
1.127.2.22.2. 4(paf 659:3): set_name(*new String(MAIN_CLASS_NAME));
1.127.2.20 paf 660:
661: #ifdef PA_BPT
662: // ^bpt[]
663: add_native_method("bpt", Method::CT_ANY, _bpt, 0, 0);
664: #endif
1.121 paf 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:
1.127.2.22.2. 4(paf 723:3): VStateless_class& VClassMAIN_create() {
724:3): return *new VClassMAIN;
1.1 paf 725: }
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