Annotation of parser3/src/classes/op.C, revision 1.127.2.22.2.4
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. (paf 8:): static const char* IDENT_OP_C="$Date: 2003/03/19 13:16:55 $";
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();
1.127.2.22 paf 34: override ~VClassMAIN() {}
1.10 paf 35: };
36:
1.127.2.10 paf 37: // defines for statics
38:
39: #define SWITCH_DATA_NAME "SWITCH-DATA"
40: #define CACHE_DATA_NAME "CACHE-DATA"
41: #define EXCEPTION_VAR_NAME "exception"
42: #define EXCEPTION_TYPE_PART_NAME "type"
43: #define EXCEPTION_SOURCE_PART_NAME "source"
44: #define EXCEPTION_COMMENT_PART_NAME "comment"
45: #define EXCEPTION_HANDLED_PART_NAME "handled"
46:
47: // statics
48:
49: //^switch ^case
1.127.2.22.2. (paf 50:): static const String& switch_data_name(new String(SWITCH_DATA_NAME));
1.127.2.10 paf 51: //^cache
1.127.2.22.2. (paf 52:): static const String& cache_data_name(new String(CACHE_DATA_NAME));
1.127.2.10 paf 53:
1.127.2.22.2. (paf 54:): static const String& exception_var_name(new String(EXCEPTION_VAR_NAME));
55:): static const String& exception_type_part_name(new String(EXCEPTION_TYPE_PART_NAME));
56:): static const String& exception_source_part_name(new String(EXCEPTION_SOURCE_PART_NAME));
57:): static const String& exception_comment_part_name(new String(EXCEPTION_COMMENT_PART_NAME));
58:): static const String& exception_handled_part_name(new String(EXCEPTION_HANDLED_PART_NAME));
1.127.2.10 paf 59:
1.127.2.1 paf 60: // helpers
61:
1.127.2.22.2. (paf 62:): class Untaint_lang_name2enum: public Hash<String* , int> {
1.127.2.10 paf 63: public:
64: Untaint_lang_name2enum() {
65: #define ULN(name, LANG) \
1.127.2.22.2. (paf 66:): put(String* (new String(name)), (value_type)String::UL_##LANG);
1.127.2.10 paf 67: ULN("as-is", AS_IS);
68: ULN("optimized-as-is", AS_IS|String::UL_OPTIMIZE_BIT);
69: ULN("file-spec", FILE_SPEC);
70: ULN("http-header", HTTP_HEADER);
71: ULN("mail-header", MAIL_HEADER);
72: ULN("uri", URI);
73: ULN("table", TABLE);
74: ULN("sql", SQL);
75: ULN("js", JS);
76: ULN("xml", XML);
77: ULN("optimized-xml", XML|String::UL_OPTIMIZE_BIT);
78: ULN("html", HTML);
79: ULN("optimized-html", HTML|String::UL_OPTIMIZE_BIT);
80: #undef ULN
81: }
82: } untaint_lang_name2enum;
1.127.2.1 paf 83:
1.10 paf 84: // methods
85:
1.127.2.22.2. (paf 86:): static void _if(Request& r, const String& /*method_name*/, MethodParams* params) {
1.127.2.13 paf 87: ValuePtr condition_code=params->as_junction(0, "condition must be expression");
1.1 paf 88:
1.81 paf 89: bool condition=r.process_to_value(condition_code,
1.83 paf 90: /*0/*no name* /,*/
1.127.2.10 paf 91: false/*don't intercept string*/)->as_bool();
1.6 paf 92: if(condition)
1.127.2.13 paf 93: r.write_pass_lang(r.process(params->as_junction(1, "'then' parameter must be code")));
94: else if(params->count()>2)
95: r.write_pass_lang(r.process(params->as_junction(2, "'else' parameter must be code")));
1.1 paf 96: }
97:
1.127.2.22.2. (paf 98:): static void _untaint(Request& r, const String& method_name, MethodParams* params) {
1.1 paf 99:
1.127.2.18 paf 100: String_UL lang;
1.127.2.13 paf 101: if(params->count()==1)
1.59 paf 102: lang=String::UL_AS_IS; // mark as simply 'tainted'. useful in html from sql
103: else {
1.127.2.22.2. (paf 104:): const String& lang_name=params->as_string(0, "lang must be string");
1.127.2.10 paf 105: lang=untaint_lang_name2enum.get(lang_name);
1.59 paf 106: if(!lang)
1.78 paf 107: throw Exception(0,
1.127.2.10 paf 108: lang_name,
1.59 paf 109: "invalid taint language");
110: }
1.1 paf 111:
112: {
1.127.2.13 paf 113: ValuePtr vbody=params->as_junction(params->count()-1, "body must be code");
1.1 paf 114:
115: Temp_lang temp_lang(r, lang); // set temporarily specified ^untaint[language;
1.86 paf 116: r.write_pass_lang(r.process(vbody)); // process marking tainted with that lang
1.1 paf 117: }
118: }
119:
1.127.2.22.2. (paf 120:): static void _taint(Request& r, const String& /*method_name*/, MethodParams* params) {
1.1 paf 121:
1.127.2.18 paf 122: String_UL lang;
1.127.2.13 paf 123: if(params->count()==1)
1.1 paf 124: lang=String::UL_TAINTED; // mark as simply 'tainted'. useful in table:set
125: else {
1.127.2.22.2. (paf 126:): const String& lang_name=params->as_string(0, "lang must be string");
1.127.2.10 paf 127: lang=untaint_lang_name2enum.get(lang_name);
1.1 paf 128: if(!lang)
1.78 paf 129: throw Exception(0,
1.127.2.10 paf 130: lang_name,
1.3 paf 131: "invalid taint language");
1.1 paf 132: }
133:
134: {
1.127.2.13 paf 135: ValuePtr vbody=params->as_no_junction(params->count()-1, "body must not be code");
1.1 paf 136:
1.127.2.10 paf 137: String result;
1.1 paf 138: result.append(
1.127.2.10 paf 139: *vbody->as_string(&pool), // process marking tainted with that lang
1.1 paf 140: lang, true); // force result language to specified
141: r.write_pass_lang(result);
142: }
143: }
144:
1.127.2.22.2. (paf 145:): static void _process(Request& r, const String& method_name, MethodParams* params) {
146:): const String* source; // must be declared here to prevent premature destruction
1.127.2.14 paf 147: MethodPtr main_method;
1.127.2.13 paf 148: ValuePtr target_self=params->count()>1?
149: params->as_no_junction(0, "target must not be code")
1.127.2.10 paf 150: :ValuePtr(&r.get_method_frame()->caller()->self());
1.1 paf 151: {
1.127.2.13 paf 152: ValuePtr vjunction=params->as_junction(params->count()-1, "body must be code");
1.114 paf 153:
1.127.2.10 paf 154: VStateless_class *target_class=target_self->get_last_derived_class();
1.116 paf 155: if(!target_class)
156: throw Exception("parser.runtime",
1.127.2.9 paf 157: method_name,
1.116 paf 158: "no target class");
159:
1.114 paf 160: // evaluate source to process
1.127.2.15 paf 161: source=r.process_to_string(vjunction);
1.114 paf 162:
1.73 paf 163: // temporary remove language change
164: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
1.1 paf 165: // temporary zero @main so to maybe-replace it in processed code
1.127.2.10 paf 166: Temp_method temp_method_main(*target_class, main_method_name, MethodPtr(0));
1.1 paf 167: // temporary zero @auto so it wouldn't be auto-called in Request::use_buf
1.127.2.10 paf 168: Temp_method temp_method_auto(*target_class, auto_method_name, MethodPtr(0));
1.1 paf 169:
1.101 paf 170: // calculate pseudo file name of processed chars
171: // would be something like "/some/file(4) process"
172: char local_place[MAX_STRING];
173: #ifndef NO_STRING_ORIGIN
1.127.2.10 paf 174: const String_fragment::Origin& source_origin=source->origin();
175: const String_fragment::Origin& method_origin=method_name->origin();
1.101 paf 176: size_t place_size;
177: if(source_origin.file==method_origin.file)
178: place_size=snprintf(local_place, MAX_STRING, "%s(%d) %s", // same file
179: source_origin.file?source_origin.file:"unknown_file", 1+source_origin.line,
1.127.2.14 paf 180: method_name->cstr().get())+1;
1.101 paf 181: else // different files ^process{external__file_text__or__sql}
182: place_size=snprintf(local_place, MAX_STRING, "%s",
183: source_origin.file?source_origin.file:"unknown_file")+1;
184: #else
1.127.2.9 paf 185: strncpy(local_place, method_name->cstr(), MAX_STRING-1); place[MAX_STRING-1]=0;
1.101 paf 186: size_t place_size=strlen(local_place)+1;
187: #endif
1.127.2.12 paf 188: char *heap_place=pool.copy(local_place, place_size);
1.1 paf 189:
190: // process source code, append processed methods to 'self' class
191: // maybe-define new @main
1.116 paf 192: r.use_buf(*target_class,
1.127.2.22.2. (paf 193:): source->cstr(pool, String::UL_UNSPECIFIED, r.connection(0)),
194:): String* (new String(heap_place, place_size, true /*tainted*/)),
1.113 paf 195: heap_place);
1.1 paf 196:
1.73 paf 197: // main_method
1.127.2.10 paf 198: main_method=target_class->get_method(main_method_name);
1.73 paf 199: }
200: // after restoring current-request-lang
201: // maybe-execute @main[]
202: if(main_method) {
1.119 paf 203: // temporarily set method_frame's self to target_self
204: Temp_method_frame_self tmfs(*r.get_method_frame(), target_self);
1.73 paf 205: // execute!
206: r.execute(*main_method->parser_code);
1.1 paf 207: }
208: }
209:
1.127.2.22.2. (paf 210:): static void _rem(Request& r, const String& /*method_name*/, MethodParams* params) {
1.127.2.13 paf 211: params->as_junction(0, "body must be code");
1.1 paf 212: }
213:
1.127.2.22.2. (paf 214:): static void _while(Request& r, const String& method_name, MethodParams* params) {
1.1 paf 215:
1.127.2.13 paf 216: ValuePtr vcondition=params->as_junction(0, "condition must be expression");
217: ValuePtr body=params->as_junction(1, "body must be code");
1.1 paf 218:
219: // while...
220: int endless_loop_count=0;
221: while(true) {
1.18 parser 222: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
1.78 paf 223: throw Exception("parser.runtime",
1.127.2.9 paf 224: method_name,
1.1 paf 225: "endless loop detected");
226:
1.86 paf 227: bool condition=r.process_to_value(vcondition,
1.83 paf 228: /*0/*no name* /,*/
1.127.2.10 paf 229: false/*don't intercept string*/)->as_bool();
1.1 paf 230: if(!condition) // ...condition is true
231: break;
232:
233: // write processed body
1.86 paf 234: r.write_pass_lang(r.process(body));
1.1 paf 235: }
236: }
237:
1.127.2.22.2. (paf 238:): static void _use(Request& r, const String& method_name, MethodParams* params) {
1.127.2.13 paf 239: ValuePtr vfile=params->as_no_junction(0, "file name must not be code");
1.127.2.10 paf 240: r.use_file(*r.main_class, vfile->as_string(&pool));
1.1 paf 241: }
242:
1.127.2.22.2. (paf 243:): static void _for(Request& r, const String& method_name, MethodParams* params) {
244:): const String& var_name=params->as_string(0, "var name must be string");
1.127.2.13 paf 245: int from=params->as_int(1, "from must be int", r);
246: int to=params->as_int(2, "to must be int", r);
247: ValuePtr body_code=params->as_junction(3, "body must be code");
248: ValuePtr delim_maybe_code=params->count()>4?(*params)[4]:ValuePtr(0);
1.1 paf 249:
1.57 paf 250: if(to-from>=MAX_LOOPS) // too long loop?
1.78 paf 251: throw Exception("parser.runtime",
1.127.2.9 paf 252: method_name,
1.57 paf 253: "endless loop detected");
254:
1.1 paf 255: bool need_delim=false;
1.127.2.10 paf 256: VIntPtr vint(new VInt(0));
1.117 paf 257: r.get_method_frame()->caller()->put_element(var_name, vint, false);
1.1 paf 258: for(int i=from; i<=to; i++) {
259: vint->set_int(i);
260:
1.108 paf 261: StringOrValue sv_processed=r.process(body_code);
1.127.2.22.2. (paf 262:): const String& s_processed=sv_processed.get_string();
1.108 paf 263: if(delim_maybe_code && s_processed && s_processed->size()) { // delimiter set and we have body
264: if(need_delim) // need delim & iteration produced string?
1.127.2.10 paf 265: r.write_pass_lang(r.process(delim_maybe_code));
1.1 paf 266: need_delim=true;
267: }
1.108 paf 268: r.write_pass_lang(sv_processed);
1.1 paf 269: }
270: }
271:
1.127.2.22.2. (paf 272:): static void _eval(Request& r, const String& method_name, MethodParams* params) {
1.127.2.13 paf 273: ValuePtr expr=params->as_junction(0, "need expression");
1.1 paf 274: // evaluate expresion
1.127.2.10 paf 275: ValuePtr value_result=r.process_to_value(expr,
1.83 paf 276: /*0/*no name YET* /,*/
1.127.2.10 paf 277: true/*don't intercept string*/)->as_expr_result();
1.127.2.13 paf 278: if(params->count()>1) {
279: ValuePtr fmt=params->as_no_junction(1, "fmt must not be code");
1.127.2.10 paf 280: String string;
281: string.APPEND_CONST(
282: format(pool, value_result->as_double(), fmt->as_string(&pool)->cstr()));
1.91 paf 283: r.write_no_lang(string);
284: } else
1.127.2.10 paf 285: r.write_no_lang(value_result);
1.1 paf 286: }
287:
1.127.2.22.2. (paf 288:): static void _connect(Request& r, const String& method_name, MethodParams* params) {
1.63 paf 289: #ifdef RESOURCES_DEBUG
290: struct timeval mt[2];
291: #endif
1.127.2.13 paf 292: ValuePtr url=params->as_no_junction(0, "url must not be code");
293: ValuePtr body_code=params->as_junction(1, "body must be code");
1.1 paf 294:
1.127.2.10 paf 295: Table* protocol2driver_and_client=0;
1.127.2.22.2. (paf 296:): if(ValuePtr sql=r.main_class->get_element(String* (new String(MAIN_SQL_NAME)), *r.main_class, false)) {
297:): if(ValuePtr element=sql->get_element(String* (new String(MAIN_SQL_DRIVERS_NAME)), *sql, false)) {
1.113 paf 298: protocol2driver_and_client=element->get_table();
299: }
300: }
1.11 paf 301:
1.63 paf 302: #ifdef RESOURCES_DEBUG
303: //measure:before
304: gettimeofday(&mt[0],NULL);
305: #endif
1.1 paf 306: // connect
1.127.2.10 paf 307: SQL_ConnectionPtr connection=SQL_driver_manager.get_connection(pool,
308: url->as_string(&pool), method_name, protocol2driver_and_client);
1.1 paf 309:
1.63 paf 310: #ifdef RESOURCES_DEBUG
311: //measure:after connect
312: gettimeofday(&mt[1],NULL);
313:
314: double t[2];
315: for(int i=0;i<2;i++)
316: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
317:
318: r.sql_connect_time+=t[1]-t[0];
319: #endif
1.67 paf 320: Temp_connection temp_connection(r, connection.get());
1.1 paf 321: // execute body
1.53 parser 322: try {
1.86 paf 323: r.write_assign_lang(r.process(body_code));
1.75 paf 324: } catch(...) { // process problem
1.67 paf 325: connection->mark_to_rollback();
1.127.2.6 paf 326: rethrow;
1.1 paf 327: }
328: }
329:
1.41 parser 330: #ifndef DOXYGEN
1.127.2.10 paf 331: class Switch_data: public PA_Object {
332: public:
333: Request& r;
334: ValuePtr searching;
335: ValuePtr found;
336: ValuePtr _default;
337: public:
338: Switch_data(Request& ar, ValuePtr asearching):
339: r(ar), searching(asearching) {}
1.28 parser 340: };
1.127.2.10 paf 341: DECLARE_OBJECT_PTR(Switch_data);
1.41 parser 342: #endif
1.127.2.22.2. (paf 343:): static void _switch(Request& r, const String& /*method_name*/, MethodParams* params) {
1.127.2.13 paf 344: Switch_dataPtr data(new Switch_data(r, r.process_to_value(params->get(0))));
1.127.2.22.2. (paf 345:): Temp_hash_value<String* , PA_Object* >
1.127.2.10 paf 346: switch_data_setter(r.classes_conf, switch_data_name, data);
1.28 parser 347:
1.127.2.13 paf 348: ValuePtr cases_code=params->as_junction(1, "switch cases must be code");
1.82 paf 349: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
350: // because of stacked WWrapper used there as wcontext
1.84 paf 351: r.process(cases_code, true/*intercept_string*/);
1.127.2.10 paf 352: if(ValuePtr selected_code=data->found? data->found: data->_default) {
1.83 paf 353: // setting code context, would execute in ^switch[...]{>>context<<}
1.105 paf 354: //selected_code->get_junction()->change_context(cases_code.get_junction());
1.127.2.10 paf 355: r.write_pass_lang(r.process(selected_code));
1.83 paf 356: }
1.28 parser 357: }
358:
1.127.2.22.2. (paf 359:): static void _case(Request& r, const String& method_name, MethodParams* params) {
1.38 parser 360:
1.127.2.10 paf 361: Switch_data* data=static_cast<Switch_data*>(r.classes_conf.get(switch_data_name).get());
1.38 parser 362: if(!data)
1.78 paf 363: throw Exception("parser.runtime",
1.127.2.9 paf 364: method_name,
1.38 parser 365: "without switch");
1.28 parser 366:
1.127.2.13 paf 367: int count=params->count();
368: ValuePtr code=params->as_junction(--count, "case result must be code");
1.83 paf 369:
370: // killing context for safety, would execute in ^switch[...]{>>context<<}
371: // reason: context is stacked, and it would become invalid afterwards
1.105 paf 372: //code->get_junction()->change_context(0);
1.83 paf 373:
1.28 parser 374: for(int i=0; i<count; i++) {
1.127.2.13 paf 375: ValuePtr value=r.process_to_value(params->get(i));
1.28 parser 376:
1.127.2.10 paf 377: if(*value->as_string(&pool) == CASE_DEFAULT_VALUE) {
1.38 parser 378: data->_default=code;
1.28 parser 379: break;
380: }
381:
382: bool matches;
1.38 parser 383: if(data->searching->is_string())
1.127.2.10 paf 384: matches=*data->searching->as_string(&pool) == *value->as_string(&pool);
1.28 parser 385: else
1.127.2.10 paf 386: matches=data->searching->as_double() == value->as_double();
1.28 parser 387:
388: if(matches) {
1.82 paf 389: if(data->found)
390: throw Exception("parser.runtime",
1.127.2.9 paf 391: method_name,
1.82 paf 392: "duplicate found");
393:
1.38 parser 394: data->found=code;
1.28 parser 395: break;
396: }
397: }
398: }
399:
1.63 paf 400: // cache--
401:
402: // consts
403:
1.127.2.22.2. (paf 404:): const int DATA_STRING_SERIALIZED_VERSION=0x0004;
1.63 paf 405:
406: // helper types
407:
408: #ifndef DOXYGEN
409: struct Data_string_serialized_prolog {
410: int version;
1.79 paf 411: time_t expires;
1.63 paf 412: };
413: #endif
414:
1.127.2.22.2. (paf 415:): void cache_delete(const String& file_spec) {
1.68 paf 416: file_delete(file_spec, false/*fail_on_read_problem*/);
1.63 paf 417: }
1.69 paf 418:
419: #ifndef DOXYGEN
1.127.2.10 paf 420: class Cache_data: public PA_Object {
421: public:
1.79 paf 422: time_t expires;
423: };
1.127.2.10 paf 424: DECLARE_OBJECT_PTR(Cache_data);
1.69 paf 425: struct Locked_process_and_cache_put_action_info {
426: Request *r;
1.79 paf 427: Cache_data *data;
1.127.2.22.2. (paf 428:): ValuePtr body_code; const String& evaluated_body;
1.69 paf 429: };
430: #endif
1.127.2.2 paf 431: /* @todo maybe network order worth spending some effort?
432: don't bothering myself with network byte order,
433: am not planning to be able to move resulting file across platforms
434: */
1.69 paf 435: static void locked_process_and_cache_put_action(int f, void *context) {
436: Locked_process_and_cache_put_action_info& info=
437: *static_cast<Locked_process_and_cache_put_action_info *>(context);
1.127.2.10 paf 438:
1.127.2.22.2. (paf 439:): =info.r->pool();
1.69 paf 440:
441: // body->process
1.127.2.10 paf 442: info.evaluated_body=info.r->process_to_string(info.body_code);
1.69 paf 443:
1.79 paf 444: // expiration time not spoiled by ^cache(0) or something?
445: if(info.data->expires > time(0)) {
446: // string -serialize> buffer
1.127.2.10 paf 447: char *data; size_t data_size;
448: info.evaluated_body->serialize(pool,
1.79 paf 449: sizeof(Data_string_serialized_prolog),
450: data, data_size);
451: Data_string_serialized_prolog& prolog=
1.127.2.10 paf 452: *reinterpret_cast<Data_string_serialized_prolog *>(data);
1.79 paf 453: prolog.version=DATA_STRING_SERIALIZED_VERSION;
454: prolog.expires=info.data->expires;
455:
456: // buffer -write> file
457: write(f, data, data_size);
458: } else // expired!
459: info.data->expires=0; // flag it so that could be easily checked by caller
1.69 paf 460: }
1.127.2.22.2. (paf 461:): const String& locked_process_and_cache_put(Request& r,
1.127.2.10 paf 462: ValuePtr body_code,
1.79 paf 463: Cache_data& data,
1.127.2.22.2. (paf 464:): const String& file_spec) {
1.127.2.10 paf 465: Locked_process_and_cache_put_action_info info;
466: info.r=&r;
467: info.data=&data;
468: info.body_code=body_code;
1.69 paf 469:
1.127.2.22.2. (paf 470:): const String& result=file_write_action_under_lock(
1.69 paf 471: file_spec,
472: "cache_put", locked_process_and_cache_put_action, &info,
473: false/*as_text*/,
474: false/*do_append*/,
1.96 paf 475: false/*block*/,
1.127.2.22.2. (paf 476:): false/*fail on lock problem*/) ? info.evaluated_body: 0;
1.100 paf 477: time_t now=time(0);
478: if(data.expires<=now)
1.79 paf 479: cache_delete(file_spec);
480: return result;
1.63 paf 481: }
1.127.2.22.2. (paf 482:): const String& cache_getCharset& charset, const String& file_spec, time_t now) {
1.127.2.10 paf 483: File_read_result file=file_read(pool, charset, file_spec,
1.63 paf 484: false/*as_text*/,
1.127.2.10 paf 485: 0, //no params
486: false/*fail_on_read_problem*/);
1.127.2.11 paf 487: if(file.success && file.size/* ignore reads which are empty due to
1.72 paf 488: non-unary open+lockEX conflict with lockSH */) {
1.127.2.10 paf 489:
1.72 paf 490: Data_string_serialized_prolog& prolog=
1.127.2.10 paf 491: *reinterpret_cast<Data_string_serialized_prolog *>(file.data);
1.63 paf 492:
1.127.2.22.2. (paf 493:): const String& result(new String);
1.72 paf 494: if(
1.127.2.11 paf 495: file.size>=sizeof(Data_string_serialized_prolog)
1.72 paf 496: && prolog.version==DATA_STRING_SERIALIZED_VERSION
1.79 paf 497: && prolog.expires > now
1.72 paf 498: && result->deserialize(
1.127.2.22.2. (paf 499:): sizeof(Data_string_serialized_prolog), file.data, file.size, file_spec->cstr()))
1.72 paf 500: return result;
501: }
1.63 paf 502:
1.127.2.22.2. (paf 503:): return 0;
1.63 paf 504: }
1.127.2.22.2. (paf 505:): static time_t as_expires(Request& r, const String& method_name, MethodParams* params,
1.79 paf 506: int index, time_t now) {
507: time_t result;
1.127.2.13 paf 508: if(Value* vdate=(*params)[index]->as(VDATE_TYPE, false))
1.127.2.10 paf 509: result=static_cast<VDate*>(vdate)->get_time();
1.79 paf 510: else
1.127.2.13 paf 511: result=now+(time_t)params->as_double(index, "lifespan must be date or number", r);
1.79 paf 512:
513: return result;
514: }
1.127.2.22.2. (paf 515:): static const String& as_file_spec(Request& r, MethodParams* params, int index) {
1.127.2.13 paf 516: return r.absolute(params->as_string(index, "filespec must be string"));
1.79 paf 517: }
1.127.2.22.2. (paf 518:): static void _cache(Request& r, const String& method_name, MethodParams* params) {
1.79 paf 519: time_t now=time(0);
520:
521: // ^cache[filename] ^cache(seconds) ^cache[expires date]
1.127.2.13 paf 522: if(params->count()==1) {
523: if((*params)[0]->is_string()) { // filename?
1.79 paf 524: cache_delete(as_file_spec(r, params, 0));
525: return;
526: }
527:
528: // secods|expires date
1.127.2.10 paf 529: Cache_data* data=static_cast<Cache_data*>(r.classes_conf.get(cache_data_name).get());
1.79 paf 530: if(!data)
531: throw Exception("parser.runtime",
1.127.2.9 paf 532: method_name,
1.79 paf 533: "expire-time reducing instruction without cache");
534:
535: time_t expires=as_expires(r, method_name, params, 0, now);
536: if(expires < data->expires)
537: data->expires=expires;
538:
539: return;
540: }
1.63 paf 541:
542: // file_spec, expires, body code
1.127.2.22.2. (paf 543:): const String& file_spec=r.absolute(params->as_string(0, "filespec must be string"));
1.65 paf 544:
1.127.2.10 paf 545: Cache_dataPtr data(new Cache_data);
1.127.2.22.2. (paf 546:): Temp_hash_value<String* , PA_Object* >
1.127.2.10 paf 547: cache_data_setter(r.classes_conf, cache_data_name, data);
548: data->expires=as_expires(r, method_name, params, 1, now);
1.127.2.13 paf 549: ValuePtr body_code=params->as_junction(2, "body must be code");
1.63 paf 550:
1.127.2.10 paf 551: if(data->expires>now) { // valid 'expires' specified? try cached copy...
1.69 paf 552: // hence we don't hope to have unary create/lockEX
553: // we need some plan to live in a life like that, so...
554: // worst races plan:
555: // A B
556: // open
557: // |open
558: // lockSH
559: // |nonblocking-lockEX fails
560: // unlockSH
561: // close, cache_get returns 0
562: // open
563: // nonblocking-lockEX succeeds; process, write, close
564: // |retry1: open
565: // ...
566: // |lockSH succeeds; ...
567:
568: for(int retry=0; retry<2; retry++) {
1.127.2.22.2. (paf 569:): if(const String& cached_body=cache_get(pool, r.charsets.source(), file_spec, now)) { // have cached copy?
1.79 paf 570: // write it out
571: r.write_assign_lang(*cached_body);
572: // happy with it
573: return;
574: }
1.69 paf 575:
576: // non-blocked lock; process; cache it
1.127.2.22.2. (paf 577:): if(const String& processed_body=
1.127.2.10 paf 578: locked_process_and_cache_put(r, body_code, *data, file_spec)) {
1.63 paf 579: // write it out
1.69 paf 580: r.write_assign_lang(*processed_body);
1.63 paf 581: // happy with it
582: return;
1.69 paf 583: } else { // somebody writing result right now
584: pa_sleep(0, 500000); // waiting half a second
585: retry=0; // prolonging our wait, than could cache_get it, without processing body_code
1.63 paf 586: }
1.69 paf 587: }
1.78 paf 588: throw Exception(0,
1.127.2.10 paf 589: file_spec,
1.69 paf 590: "locking problem");
591: } else {
1.79 paf 592: // instructed not to cache; forget cached copy
1.68 paf 593: cache_delete(file_spec);
1.69 paf 594: // process
1.127.2.22.2. (paf 595:): const String& processed_body=r.process_to_string(body_code);
1.69 paf 596: // write it out
1.127.2.10 paf 597: r.write_assign_lang(*processed_body);
1.69 paf 598: // happy with it
599: return;
600: }
601: // never reached
1.63 paf 602: }
603:
1.74 paf 604: // also used in pa_request.C to pass param to @unhandled_exception
1.127.2.22.2. (paf 605:): VHashPtr exception2vhashconst Exception& e) {
1.127.2.10 paf 606: VHashPtr result(new VHash);
1.127.2.22.2. (paf 607:): HashStringValue& hash=result->hash(0);
1.127.2.5 paf 608: if(const char* type=e.type(true))
1.127.2.22.2. (paf 609:): hash.put(exception_type_part_name, ValuePtr(new VString(String* (new String(type)))));
610:): if(const String& asource=e.problem_source()) {
611:): const String* source(new String);
1.127.2.10 paf 612: source->append(*asource, String::UL_TAINTED, true/*forced*/);
1.74 paf 613:
1.127.2.10 paf 614: hash.put(exception_source_part_name, ValuePtr(new VString(source)));
1.74 paf 615: #ifndef NO_STRING_ORIGIN
1.127.2.10 paf 616: const String_fragment::Origin& origin=source->origin();
1.127.2.22.2. (paf 617:): hash.put(String* (new String("file", 0, true)),
618:): ValuePtr(new VString(String* (new String(origin.file)))));
619:): hash.put(String* (new String("lineno")),
1.127.2.10 paf 620: ValuePtr(new VInt(1+origin.line)));
1.74 paf 621: #endif
622: }
1.127.2.5 paf 623: if(const char* ecomment=e.comment(true)) {
1.127.2.10 paf 624: char *pcomment=pool.copy(ecomment);
625: hash.put(exception_comment_part_name,
1.127.2.22.2. (paf 626:): ValuePtr(new VString(String* (new String(pcomment, 0, true/*tainted*/)))));
1.74 paf 627: }
1.127.2.10 paf 628: hash.put(exception_handled_part_name,
629: ValuePtr(new VBool(false)));
1.74 paf 630:
631: return result;
632: }
633:
1.127.2.22.2. (paf 634:): static void _try_operator(Request& r, const String& method_name, MethodParams* params) {
1.74 paf 635:
1.127.2.13 paf 636: ValuePtr body_code=params->as_junction(0, "body_code must be code");
637: ValuePtr catch_code=params->as_junction(1, "catch_code must be code");
1.74 paf 638:
1.86 paf 639: StringOrValue result;
1.123 paf 640: // taking snapshot of try-context
641: Request_context_saver try_context(r);
1.74 paf 642: try {
1.86 paf 643: result=r.process(body_code);
1.74 paf 644: } catch(const Exception& e) {
1.123 paf 645: Request_context_saver throw_context(r); // taking snapshot of throw-context [stack trace contains error]
646: try_context.restore(); // restoring try-context to perform catch-code
647:
1.127.2.6 paf 648: VHashPtr vhash=exception2vhash(pool, e);
1.74 paf 649:
1.127.2.10 paf 650: JunctionPtr junction=catch_code->get_junction();
651: Value* method_frame=junction->method_frame;
652: ValuePtr saved_exception_var_value=method_frame->get_element(exception_var_name, *method_frame, false);
653: junction->method_frame->put_element(exception_var_name, vhash, false);
1.86 paf 654: result=r.process(catch_code);
1.74 paf 655: bool handled=false;
1.127.2.10 paf 656: if(ValuePtr value=
1.127.2.22.2. (paf 657:): vhash->hash(0).get(exception_handled_part_name))
1.74 paf 658: handled=value->as_bool();
1.127.2.10 paf 659: junction->method_frame->put_element(exception_var_name, saved_exception_var_value, false);
1.74 paf 660:
1.123 paf 661: if(!handled) {
662: throw_context.restore(); // restoring throw-context [exception were not handled]
1.74 paf 663: throw(e); // rethrow
1.123 paf 664: }
1.74 paf 665: }
1.123 paf 666: // write out result
1.86 paf 667: r.write_pass_lang(result);
1.74 paf 668: }
669:
1.127.2.22.2. (paf 670:): static void _throw_operator(Request& r, const String& method_name, MethodParams* params) {
1.74 paf 671:
1.127.2.13 paf 672: if(params->count()==1) {
673: ValuePtr param0=(*params)[0];
1.127.2.10 paf 674: if(HashStringValue *hash=param0->get_hash(method_name)) {
1.127.2.5 paf 675: const char* type=0;
1.127.2.10 paf 676: if(ValuePtr value=hash->get(exception_type_part_name))
1.127.2.22.2. (paf 677:): type=value->as_string(&pool)->cstr();
678:): const String* source;
1.127.2.10 paf 679: if(ValuePtr value=hash->get(exception_source_part_name))
680: source=value->as_string(&pool);
1.127.2.22.2. (paf 681:): const char* comment;
1.127.2.10 paf 682: if(ValuePtr value=hash->get(exception_comment_part_name))
683: comment=value->as_string(&pool)->cstr();
1.74 paf 684:
1.78 paf 685: throw Exception(type,
1.127.2.9 paf 686: source?source:method_name,
1.127.2.19 paf 687: "%s", comment?comment.get():"");
1.74 paf 688: } else
1.78 paf 689: throw Exception("parser.runtime",
1.127.2.9 paf 690: method_name,
1.74 paf 691: "one-param version has hash param");
692: } else {
1.127.2.22.2. (paf 693:): const char* type=params->as_string(0, "type must be string")->cstr();
694:): const String* source=params->as_string(1, "source must be string");
695:): const char* comment=params->count()>2? params->as_string(2, "comment must be string")->cstr()
1.127.2.10 paf 696: :CharPtr(0);
1.127.2.19 paf 697: throw Exception(type, source, "%s", comment?comment.get():"");
1.74 paf 698: }
699: }
1.127.2.20 paf 700:
701: #if defined(WIN32) && defined(_DEBUG)
702: # define PA_BPT
1.127.2.22.2. (paf 703:): static void _bpt(Request& r, const String& method_name, MethodParams* params) {
1.127.2.20 paf 704: _asm int 3;
705: }
706: #endif
707:
1.10 paf 708: // constructor
709:
1.127.2.10 paf 710: VClassMAIN::VClassMAIN(): VClass() {
1.127.2.22.2. (paf 711:): set_name(String* (new String(MAIN_CLASS_NAME)));
1.127.2.20 paf 712:
713: #ifdef PA_BPT
714: // ^bpt[]
715: add_native_method("bpt", Method::CT_ANY, _bpt, 0, 0);
716: #endif
1.121 paf 717:
1.1 paf 718: // ^if(condition){code-when-true}
719: // ^if(condition){code-when-true}{code-when-false}
1.10 paf 720: add_native_method("if", Method::CT_ANY, _if, 2, 3);
1.1 paf 721:
722: // ^untaint[as-is|uri|sql|js|html|html-typo]{code}
1.59 paf 723: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2);
1.1 paf 724:
725: // ^taint[as-is|uri|sql|js|html|html-typo]{code}
1.10 paf 726: add_native_method("taint", Method::CT_ANY, _taint, 1, 2);
1.1 paf 727:
728: // ^process[code]
1.116 paf 729: add_native_method("process", Method::CT_ANY, _process, 1, 2);
1.1 paf 730:
731: // ^rem{code}
1.51 parser 732: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000);
1.1 paf 733:
734: // ^while(condition){code}
1.10 paf 735: add_native_method("while", Method::CT_ANY, _while, 2, 2);
1.1 paf 736:
737: // ^use[file]
1.10 paf 738: add_native_method("use", Method::CT_ANY, _use, 1, 1);
1.1 paf 739:
1.54 paf 740: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.10 paf 741: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1);
1.1 paf 742:
743: // ^eval(expr)
744: // ^eval(expr)[format]
1.10 paf 745: add_native_method("eval", Method::CT_ANY, _eval, 1, 2);
1.52 parser 746:
1.1 paf 747: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 748: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
749:
1.63 paf 750:
1.65 paf 751: // ^cache[file_spec] delete cache
1.63 paf 752: // ^cache[file_spec](time){code} time=0 no cache
1.65 paf 753: add_native_method("cache", Method::CT_ANY, _cache, 1, 3);
1.63 paf 754:
1.28 parser 755: // switch
756:
757: // ^switch[value]{cases}
758: add_native_method("switch", Method::CT_ANY, _switch, 2, 2);
759:
760: // ^case[value]{code}
1.51 parser 761: add_native_method("case", Method::CT_ANY, _case, 2, 10000);
1.74 paf 762:
763: // try-catch
764:
765: // ^try{code}{catch code}
766: add_native_method("try", Method::CT_ANY, _try_operator, 2, 2);
767: // ^throw[$exception hash]
768: // ^throw[type;source;comment]
769: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
770:
1.10 paf 771: }
1.11 paf 772:
773: // constructor & configurator
1.1 paf 774:
1.127.2.4 paf 775: VStateless_classPtr VClassMAIN_create() {
1.127.2.1 paf 776:
1.127.2.4 paf 777: return VStateless_classPtr(new VClassMAIN);
1.1 paf 778: }
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