Annotation of parser3/src/classes/op.C, revision 1.127.2.22.2.26
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. 6(paf 8:3): static const char* IDENT_OP_C="$Date: 2003/04/03 09:18:45 $";
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): VStateless_class *target_class=target_self.get_last_derived_class();
1.116 paf 142: if(!target_class)
143: throw Exception("parser.runtime",
1.127.2.22.2. 4(paf 144:3): 0,
1.116 paf 145: "no target class");
1.114 paf 146:
1.73 paf 147: // temporary remove language change
1.127.2.22.2. (paf 148:): Temp_lang temp_lang(r, String::L_PASS_APPENDED);
1.1 paf 149: // temporary zero @main so to maybe-replace it in processed code
1.127.2.22.2. 4(paf 150:3): Temp_method temp_method_main(*target_class, main_method_name, 0);
1.1 paf 151: // temporary zero @auto so it wouldn't be auto-called in Request::use_buf
1.127.2.22.2. 4(paf 152:3): Temp_method temp_method_auto(*target_class, auto_method_name, 0);
6(paf 153:3):
154:3): if(const String* file_name=params->last().get_string()) { // ^process...[file]
155:3): r.use_file(*target_class, r.absolute(*file_name), true/*ignore_class_path*/);
156:3): } else { // process...{string}
157:3): Value& vjunction=params->as_junction(params->count()-1, "body must be code");
158:3): // evaluate source to process
159:3): const String& source=r.process_to_string(vjunction);
160:3): r.use_buf(*target_class,
161:3): source.cstr(String::L_UNSPECIFIED, r.connection(false)),
162:3): pseudo_file_no__process);
163:3): }
164:3):
1.73 paf 165: // main_method
1.127.2.10 paf 166: main_method=target_class->get_method(main_method_name);
1.73 paf 167: }
168: // after restoring current-request-lang
169: // maybe-execute @main[]
170: if(main_method) {
1.119 paf 171: // temporarily set method_frame's self to target_self
172: Temp_method_frame_self tmfs(*r.get_method_frame(), target_self);
1.73 paf 173: // execute!
174: r.execute(*main_method->parser_code);
1.1 paf 175: }
176: }
177:
1.127.2.22.2. 4(paf 178:3): static void _rem(Request& r, MethodParams* params) {
1.127.2.13 paf 179: params->as_junction(0, "body must be code");
1.1 paf 180: }
181:
1.127.2.22.2. 2(paf 182:3): static void _while(Request& r, MethodParams* params) {
4(paf 183:3): Value& vcondition=params->as_junction(0, "condition must be expression");
184:3): Value& body=params->as_junction(1, "body must be code");
1.1 paf 185:
186: // while...
187: int endless_loop_count=0;
188: while(true) {
1.18 parser 189: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
1.78 paf 190: throw Exception("parser.runtime",
1.127.2.22.2. 4(paf 191:3): 0,
1.1 paf 192: "endless loop detected");
193:
1.86 paf 194: bool condition=r.process_to_value(vcondition,
1.83 paf 195: /*0/*no name* /,*/
1.127.2.22.2. 4(paf 196:3): false/*don't intercept string*/).as_bool();
1.1 paf 197: if(!condition) // ...condition is true
198: break;
199:
200: // write processed body
1.86 paf 201: r.write_pass_lang(r.process(body));
1.1 paf 202: }
203: }
204:
1.127.2.22.2. 2(paf 205:3): static void _use(Request& r, MethodParams* params) {
4(paf 206:3): Value& vfile=params->as_no_junction(0, "file name must not be code");
207:3): r.use_file(r.main_class, vfile.as_string());
1.1 paf 208: }
209:
1.127.2.22.2. 2(paf 210:3): static void _for(Request& r, MethodParams* params) {
(paf 211:): const String& var_name=params->as_string(0, "var name must be string");
1.127.2.13 paf 212: int from=params->as_int(1, "from must be int", r);
213: int to=params->as_int(2, "to must be int", r);
1.127.2.22.2. 4(paf 214:3): Value& body_code=params->as_junction(3, "body must be code");
(paf 215:): Value* delim_maybe_code=params->count()>4?(*params)[4]:0;
1.1 paf 216:
1.57 paf 217: if(to-from>=MAX_LOOPS) // too long loop?
1.78 paf 218: throw Exception("parser.runtime",
1.127.2.22.2. 4(paf 219:3): 0,
1.57 paf 220: "endless loop detected");
221:
1.1 paf 222: bool need_delim=false;
1.127.2.22.2. 4(paf 223:3): VInt* vint=new VInt(0);
1.117 paf 224: r.get_method_frame()->caller()->put_element(var_name, vint, false);
1.1 paf 225: for(int i=from; i<=to; i++) {
226: vint->set_int(i);
227:
1.108 paf 228: StringOrValue sv_processed=r.process(body_code);
1.127.2.22.2. 4(paf 229:3): const String* s_processed=sv_processed.get_string();
(paf 230:): if(delim_maybe_code && s_processed && s_processed->length()) { // delimiter set and we have body
1.108 paf 231: if(need_delim) // need delim & iteration produced string?
1.127.2.22.2. 4(paf 232:3): r.write_pass_lang(r.process(*delim_maybe_code));
1.1 paf 233: need_delim=true;
234: }
1.108 paf 235: r.write_pass_lang(sv_processed);
1.1 paf 236: }
237: }
238:
1.127.2.22.2. 2(paf 239:3): static void _eval(Request& r, MethodParams* params) {
4(paf 240:3): Value& expr=params->as_junction(0, "need expression");
1.1 paf 241: // evaluate expresion
1.127.2.22.2. 1(paf 242:3): Value& value_result=r.process_to_value(expr,
1.83 paf 243: /*0/*no name YET* /,*/
1.127.2.22.2. 4(paf 244:3): true/*don't intercept string*/).as_expr_result();
1.127.2.13 paf 245: if(params->count()>1) {
1.127.2.22.2. 4(paf 246:3): Value& fmt=params->as_no_junction(1, "fmt must not be code");
247:3): r.write_no_lang(String(format(value_result.as_double(), fmt.as_string().cstrm())));
1.91 paf 248: } else
1.127.2.10 paf 249: r.write_no_lang(value_result);
1.1 paf 250: }
251:
1.127.2.22.2. 2(paf 252:3): static void _connect(Request& r, MethodParams* params) {
1.63 paf 253: #ifdef RESOURCES_DEBUG
254: struct timeval mt[2];
255: #endif
1.127.2.22.2. 4(paf 256:3): Value& url=params->as_no_junction(0, "url must not be code");
257:3): Value& body_code=params->as_junction(1, "body must be code");
1.1 paf 258:
1.127.2.10 paf 259: Table* protocol2driver_and_client=0;
1.127.2.22.2. 4(paf 260:3): if(Value* sql=r.main_class.get_element(String(MAIN_SQL_NAME), r.main_class, false)) {
261:3): if(Value* element=sql->get_element(String(MAIN_SQL_DRIVERS_NAME), *sql, false)) {
1.113 paf 262: protocol2driver_and_client=element->get_table();
263: }
264: }
1.11 paf 265:
1.63 paf 266: #ifdef RESOURCES_DEBUG
267: //measure:before
268: gettimeofday(&mt[0],NULL);
269: #endif
1.1 paf 270: // connect
1.127.2.22.2. 4(paf 271:3): SQL_Connection* connection=SQL_driver_manager.get_connection(url.as_string(),
272:3): protocol2driver_and_client);
1.1 paf 273:
1.63 paf 274: #ifdef RESOURCES_DEBUG
275: //measure:after connect
276: gettimeofday(&mt[1],NULL);
277:
278: double t[2];
279: for(int i=0;i<2;i++)
280: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
281:
282: r.sql_connect_time+=t[1]-t[0];
283: #endif
1.127.2.22.2. 4(paf 284:3): Temp_connection temp_connection(r, connection);
1.1 paf 285: // execute body
1.53 parser 286: try {
1.86 paf 287: r.write_assign_lang(r.process(body_code));
1.75 paf 288: } catch(...) { // process problem
1.67 paf 289: connection->mark_to_rollback();
1.127.2.6 paf 290: rethrow;
1.1 paf 291: }
292: }
293:
1.41 parser 294: #ifndef DOXYGEN
1.127.2.10 paf 295: class Switch_data: public PA_Object {
296: public:
297: Request& r;
1.127.2.22.2. 4(paf 298:3): Value& searching;
(paf 299:): Value* found;
300:): Value* _default;
1.127.2.10 paf 301: public:
1.127.2.22.2. 4(paf 302:3): Switch_data(Request& ar, Value& asearching):
1.127.2.10 paf 303: r(ar), searching(asearching) {}
1.28 parser 304: };
1.41 parser 305: #endif
1.127.2.22.2. 4(paf 306:3): static void _switch(Request& r, MethodParams* params) {
307:3): Switch_data* data=new Switch_data(r, r.process_to_value(*(*params)[0]));
5(paf 308:3): Temp_hash_value<const StringBody, PA_Object*>
1.127.2.10 paf 309: switch_data_setter(r.classes_conf, switch_data_name, data);
1.28 parser 310:
1.127.2.22.2. 4(paf 311:3): Value& cases_code=params->as_junction(1, "switch cases must be code");
1.82 paf 312: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
313: // because of stacked WWrapper used there as wcontext
1.84 paf 314: r.process(cases_code, true/*intercept_string*/);
1.127.2.22.2. (paf 315:): if(Value* selected_code=data->found? data->found: data->_default) {
1.83 paf 316: // setting code context, would execute in ^switch[...]{>>context<<}
1.105 paf 317: //selected_code->get_junction()->change_context(cases_code.get_junction());
1.127.2.22.2. 4(paf 318:3): r.write_pass_lang(r.process(*selected_code));
1.83 paf 319: }
1.28 parser 320: }
321:
1.127.2.22.2. 2(paf 322:3): static void _case(Request& r, MethodParams* params) {
4(paf 323:3): Switch_data* data=static_cast<Switch_data*>(r.classes_conf.get(switch_data_name));
1.38 parser 324: if(!data)
1.78 paf 325: throw Exception("parser.runtime",
1.127.2.22.2. 4(paf 326:3): 0,
1.38 parser 327: "without switch");
1.28 parser 328:
1.127.2.13 paf 329: int count=params->count();
1.127.2.22.2. 4(paf 330:3): Value& code=params->as_junction(--count, "case result must be code");
1.83 paf 331:
332: // killing context for safety, would execute in ^switch[...]{>>context<<}
333: // reason: context is stacked, and it would become invalid afterwards
1.105 paf 334: //code->get_junction()->change_context(0);
1.83 paf 335:
1.28 parser 336: for(int i=0; i<count; i++) {
1.127.2.22.2. 4(paf 337:3): Value& value=r.process_to_value(*(*params)[i]);
1.28 parser 338:
1.127.2.22.2. 4(paf 339:3): if(value.as_string() == CASE_DEFAULT_VALUE) {
340:3): data->_default=&code;
1.28 parser 341: break;
342: }
343:
344: bool matches;
1.127.2.22.2. 4(paf 345:3): if(data->searching.is_string())
346:3): matches=data->searching.as_string() == value.as_string();
1.28 parser 347: else
1.127.2.22.2. 4(paf 348:3): matches=data->searching.as_double() == value.as_double();
1.28 parser 349:
350: if(matches) {
1.82 paf 351: if(data->found)
352: throw Exception("parser.runtime",
1.127.2.22.2. 4(paf 353:3): 0,
1.82 paf 354: "duplicate found");
355:
1.127.2.22.2. 4(paf 356:3): data->found=&code;
1.28 parser 357: break;
358: }
359: }
360: }
361:
1.63 paf 362: // cache--
363:
364: // consts
365:
1.127.2.22.2. (paf 366:): const int DATA_STRING_SERIALIZED_VERSION=0x0004;
1.63 paf 367:
368: // helper types
369:
370: #ifndef DOXYGEN
371: struct Data_string_serialized_prolog {
372: int version;
1.79 paf 373: time_t expires;
1.63 paf 374: };
375: #endif
376:
1.127.2.22.2. (paf 377:): void cache_delete(const String& file_spec) {
1.68 paf 378: file_delete(file_spec, false/*fail_on_read_problem*/);
1.63 paf 379: }
1.69 paf 380:
381: #ifndef DOXYGEN
1.127.2.10 paf 382: class Cache_data: public PA_Object {
383: public:
1.79 paf 384: time_t expires;
385: };
1.69 paf 386: struct Locked_process_and_cache_put_action_info {
387: Request *r;
1.79 paf 388: Cache_data *data;
1.127.2.22.2. 4(paf 389:3): Value* body_code; const String* evaluated_body;
1.69 paf 390: };
391: #endif
1.127.2.2 paf 392: /* @todo maybe network order worth spending some effort?
393: don't bothering myself with network byte order,
394: am not planning to be able to move resulting file across platforms
395: */
1.69 paf 396: static void locked_process_and_cache_put_action(int f, void *context) {
397: Locked_process_and_cache_put_action_info& info=
398: *static_cast<Locked_process_and_cache_put_action_info *>(context);
1.127.2.10 paf 399:
1.69 paf 400: // body->process
1.127.2.22.2. 4(paf 401:3): info.evaluated_body=&info.r->process_to_string(*info.body_code);
1.69 paf 402:
1.79 paf 403: // expiration time not spoiled by ^cache(0) or something?
404: if(info.data->expires > time(0)) {
405: // string -serialize> buffer
1.127.2.22.2. 4(paf 406:3): String::C serialized=info.evaluated_body->serialize(
407:3): sizeof(Data_string_serialized_prolog));
1.79 paf 408: Data_string_serialized_prolog& prolog=
1.127.2.22.2. 4(paf 409:3): *reinterpret_cast<Data_string_serialized_prolog *>(serialized.str);
1.79 paf 410: prolog.version=DATA_STRING_SERIALIZED_VERSION;
411: prolog.expires=info.data->expires;
412:
413: // buffer -write> file
1.127.2.22.2. 4(paf 414:3): write(f, serialized.str, serialized.length);
1.79 paf 415: } else // expired!
416: info.data->expires=0; // flag it so that could be easily checked by caller
1.69 paf 417: }
1.127.2.22.2. 4(paf 418:3): const String* locked_process_and_cache_put(Request& r,
419:3): Value& body_code,
420:3): Cache_data& data,
421:3): const String& file_spec) {
1.127.2.10 paf 422: Locked_process_and_cache_put_action_info info;
423: info.r=&r;
424: info.data=&data;
1.127.2.22.2. 4(paf 425:3): info.body_code=&body_code;
1.69 paf 426:
1.127.2.22.2. 4(paf 427:3): const String* result=file_write_action_under_lock(
1.69 paf 428: file_spec,
429: "cache_put", locked_process_and_cache_put_action, &info,
430: false/*as_text*/,
431: false/*do_append*/,
1.96 paf 432: false/*block*/,
1.127.2.22.2. (paf 433:): false/*fail on lock problem*/) ? info.evaluated_body: 0;
1.100 paf 434: time_t now=time(0);
435: if(data.expires<=now)
1.79 paf 436: cache_delete(file_spec);
437: return result;
1.63 paf 438: }
1.127.2.22.2. 4(paf 439:3): const String* cache_get(Charset& charset, const String& file_spec, time_t now) {
(paf 440:): File_read_result file=file_read(charset, file_spec,
1.63 paf 441: false/*as_text*/,
1.127.2.10 paf 442: 0, //no params
443: false/*fail_on_read_problem*/);
1.127.2.22.2. 4(paf 444:3): if(file.success && file.length/* ignore reads which are empty due to
1.72 paf 445: non-unary open+lockEX conflict with lockSH */) {
1.127.2.10 paf 446:
1.72 paf 447: Data_string_serialized_prolog& prolog=
1.127.2.22.2. 4(paf 448:3): *reinterpret_cast<Data_string_serialized_prolog *>(file.str);
1.63 paf 449:
1.127.2.22.2. 4(paf 450:3): String* result=new String;
1.72 paf 451: if(
1.127.2.22.2. 4(paf 452:3): file.length>=sizeof(Data_string_serialized_prolog)
1.72 paf 453: && prolog.version==DATA_STRING_SERIALIZED_VERSION
1.79 paf 454: && prolog.expires > now
1.127.2.22.2. 4(paf 455:3): && result->deserialize(sizeof(Data_string_serialized_prolog), file.str, file.length))
1.72 paf 456: return result;
457: }
1.63 paf 458:
1.127.2.22.2. (paf 459:): return 0;
1.63 paf 460: }
1.127.2.22.2. 2(paf 461:3): static time_t as_expires(Request& r, MethodParams* params,
1.79 paf 462: int index, time_t now) {
463: time_t result;
1.127.2.13 paf 464: if(Value* vdate=(*params)[index]->as(VDATE_TYPE, false))
1.127.2.10 paf 465: result=static_cast<VDate*>(vdate)->get_time();
1.79 paf 466: else
1.127.2.13 paf 467: result=now+(time_t)params->as_double(index, "lifespan must be date or number", r);
1.79 paf 468:
469: return result;
470: }
1.127.2.22.2. (paf 471:): static const String& as_file_spec(Request& r, MethodParams* params, int index) {
1.127.2.13 paf 472: return r.absolute(params->as_string(index, "filespec must be string"));
1.79 paf 473: }
1.127.2.22.2. 2(paf 474:3): static void _cache(Request& r, MethodParams* params) {
1.79 paf 475: time_t now=time(0);
476:
477: // ^cache[filename] ^cache(seconds) ^cache[expires date]
1.127.2.13 paf 478: if(params->count()==1) {
479: if((*params)[0]->is_string()) { // filename?
1.79 paf 480: cache_delete(as_file_spec(r, params, 0));
481: return;
482: }
483:
484: // secods|expires date
1.127.2.22.2. 4(paf 485:3): Cache_data* data=static_cast<Cache_data*>(r.classes_conf.get(cache_data_name));
1.79 paf 486: if(!data)
487: throw Exception("parser.runtime",
1.127.2.22.2. 4(paf 488:3): 0,
1.79 paf 489: "expire-time reducing instruction without cache");
490:
1.127.2.22.2. 4(paf 491:3): time_t expires=as_expires(r, params, 0, now);
1.79 paf 492: if(expires < data->expires)
493: data->expires=expires;
494:
495: return;
496: }
1.63 paf 497:
498: // file_spec, expires, body code
1.127.2.22.2. (paf 499:): const String& file_spec=r.absolute(params->as_string(0, "filespec must be string"));
1.65 paf 500:
1.127.2.22.2. 4(paf 501:3): Cache_data* data=new Cache_data;
5(paf 502:3): Temp_hash_value<const StringBody, PA_Object*>
1.127.2.10 paf 503: cache_data_setter(r.classes_conf, cache_data_name, data);
1.127.2.22.2. 4(paf 504:3): data->expires=as_expires(r, params, 1, now);
505:3): Value& body_code=params->as_junction(2, "body must be code");
1.63 paf 506:
1.127.2.10 paf 507: if(data->expires>now) { // valid 'expires' specified? try cached copy...
1.69 paf 508: // hence we don't hope to have unary create/lockEX
509: // we need some plan to live in a life like that, so...
510: // worst races plan:
511: // A B
512: // open
513: // |open
514: // lockSH
515: // |nonblocking-lockEX fails
516: // unlockSH
517: // close, cache_get returns 0
518: // open
519: // nonblocking-lockEX succeeds; process, write, close
520: // |retry1: open
521: // ...
522: // |lockSH succeeds; ...
523:
524: for(int retry=0; retry<2; retry++) {
1.127.2.22.2. 4(paf 525:3): if(const String* cached_body=cache_get(r.charsets.source(), file_spec, now)) { // have cached copy?
1.79 paf 526: // write it out
527: r.write_assign_lang(*cached_body);
528: // happy with it
529: return;
530: }
1.69 paf 531:
532: // non-blocked lock; process; cache it
1.127.2.22.2. 4(paf 533:3): if(const String* processed_body=
1.127.2.10 paf 534: locked_process_and_cache_put(r, body_code, *data, file_spec)) {
1.63 paf 535: // write it out
1.69 paf 536: r.write_assign_lang(*processed_body);
1.63 paf 537: // happy with it
538: return;
1.69 paf 539: } else { // somebody writing result right now
540: pa_sleep(0, 500000); // waiting half a second
541: retry=0; // prolonging our wait, than could cache_get it, without processing body_code
1.63 paf 542: }
1.69 paf 543: }
1.78 paf 544: throw Exception(0,
1.127.2.22.2. 4(paf 545:3): &file_spec,
1.69 paf 546: "locking problem");
547: } else {
1.79 paf 548: // instructed not to cache; forget cached copy
1.68 paf 549: cache_delete(file_spec);
1.69 paf 550: // process
1.127.2.22.2. (paf 551:): const String& processed_body=r.process_to_string(body_code);
1.69 paf 552: // write it out
1.127.2.22.2. 4(paf 553:3): r.write_assign_lang(processed_body);
1.69 paf 554: // happy with it
555: return;
556: }
557: // never reached
1.63 paf 558: }
559:
1.74 paf 560:
1.127.2.22.2. 5(paf 561:3):
562:3): // also used in pa_request.C to pass param to @unhandled_exception
1.74 paf 563:
1.127.2.22.2. 2(paf 564:3): static void _try_operator(Request& r, MethodParams* params) {
4(paf 565:3): Value& body_code=params->as_junction(0, "body_code must be code");
566:3): Value& catch_code=params->as_junction(1, "catch_code must be code");
1.74 paf 567:
1.86 paf 568: StringOrValue result;
1.123 paf 569: // taking snapshot of try-context
570: Request_context_saver try_context(r);
1.74 paf 571: try {
1.86 paf 572: result=r.process(body_code);
1.74 paf 573: } catch(const Exception& e) {
1.123 paf 574: Request_context_saver throw_context(r); // taking snapshot of throw-context [stack trace contains error]
575: try_context.restore(); // restoring try-context to perform catch-code
576:
1.127.2.22.2. 5(paf 577:3): Request::Exception_details details=r.get_details(e);
1.74 paf 578:
1.127.2.22.2. 4(paf 579:3): Junction* junction=catch_code.get_junction();
1.127.2.10 paf 580: Value* method_frame=junction->method_frame;
1.127.2.22.2. (paf 581:): Value* saved_exception_var_value=method_frame->get_element(exception_var_name, *method_frame, false);
5(paf 582:3): junction->method_frame->put_element(exception_var_name, &details.vhash, false);
1.86 paf 583: result=r.process(catch_code);
1.74 paf 584: bool handled=false;
1.127.2.22.2. (paf 585:): if(Value* value=
5(paf 586:3): details.vhash.hash().get(exception_handled_part_name))
1.74 paf 587: handled=value->as_bool();
1.127.2.10 paf 588: junction->method_frame->put_element(exception_var_name, saved_exception_var_value, false);
1.74 paf 589:
1.123 paf 590: if(!handled) {
591: throw_context.restore(); // restoring throw-context [exception were not handled]
1.127.2.22.2. 4(paf 592:3): rethrow;
593:3): }
1.74 paf 594: }
1.123 paf 595: // write out result
1.86 paf 596: r.write_pass_lang(result);
1.74 paf 597: }
598:
1.127.2.22.2. 2(paf 599:3): static void _throw_operator(Request& r, MethodParams* params) {
1.127.2.13 paf 600: if(params->count()==1) {
1.127.2.22.2. (paf 601:): Value* param0=(*params)[0];
2(paf 602:3): if(HashStringValue *hash=param0->get_hash()) {
1.127.2.5 paf 603: const char* type=0;
1.127.2.22.2. (paf 604:): if(Value* value=hash->get(exception_type_part_name))
605:): type=value->as_string().cstr();
4(paf 606:3): const String* source=0;
(paf 607:): if(Value* value=hash->get(exception_source_part_name))
4(paf 608:3): source=&value->as_string();
(paf 609:): const char* comment;
610:): if(Value* value=hash->get(exception_comment_part_name))
611:): comment=value->as_string().cstr();
1.74 paf 612:
1.78 paf 613: throw Exception(type,
1.127.2.22.2. 4(paf 614:3): source?source:0,
615:3): "%s", comment?comment:"");
1.74 paf 616: } else
1.78 paf 617: throw Exception("parser.runtime",
1.127.2.22.2. 4(paf 618:3): 0,
1.74 paf 619: "one-param version has hash param");
620: } else {
1.127.2.22.2. 4(paf 621:3): const char* type=params->as_string(0, "type must be string").cstr();
622:3): const String& source=params->as_string(1, "source must be string");
623:3): const char* comment=params->count()>2? params->as_string(2, "comment must be string").cstr()
1(paf 624:3): :0;
4(paf 625:3): throw Exception(type, &source, "%s", comment?comment:"");
1.74 paf 626: }
627: }
1.127.2.20 paf 628:
629: #if defined(WIN32) && defined(_DEBUG)
630: # define PA_BPT
1.127.2.22.2. 2(paf 631:3): static void _bpt(Request& r, MethodParams* params) {
1.127.2.20 paf 632: _asm int 3;
633: }
634: #endif
635:
1.10 paf 636: // constructor
637:
1.127.2.10 paf 638: VClassMAIN::VClassMAIN(): VClass() {
1.127.2.22.2. 4(paf 639:3): set_name(*new String(MAIN_CLASS_NAME));
1.127.2.20 paf 640:
641: #ifdef PA_BPT
642: // ^bpt[]
643: add_native_method("bpt", Method::CT_ANY, _bpt, 0, 0);
644: #endif
1.121 paf 645:
1.1 paf 646: // ^if(condition){code-when-true}
647: // ^if(condition){code-when-true}{code-when-false}
1.10 paf 648: add_native_method("if", Method::CT_ANY, _if, 2, 3);
1.1 paf 649:
650: // ^untaint[as-is|uri|sql|js|html|html-typo]{code}
1.59 paf 651: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2);
1.1 paf 652:
653: // ^taint[as-is|uri|sql|js|html|html-typo]{code}
1.10 paf 654: add_native_method("taint", Method::CT_ANY, _taint, 1, 2);
1.1 paf 655:
656: // ^process[code]
1.116 paf 657: add_native_method("process", Method::CT_ANY, _process, 1, 2);
1.1 paf 658:
659: // ^rem{code}
1.51 parser 660: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000);
1.1 paf 661:
662: // ^while(condition){code}
1.10 paf 663: add_native_method("while", Method::CT_ANY, _while, 2, 2);
1.1 paf 664:
665: // ^use[file]
1.10 paf 666: add_native_method("use", Method::CT_ANY, _use, 1, 1);
1.1 paf 667:
1.54 paf 668: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.10 paf 669: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1);
1.1 paf 670:
671: // ^eval(expr)
672: // ^eval(expr)[format]
1.10 paf 673: add_native_method("eval", Method::CT_ANY, _eval, 1, 2);
1.52 parser 674:
1.1 paf 675: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 676: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
677:
1.63 paf 678:
1.65 paf 679: // ^cache[file_spec] delete cache
1.63 paf 680: // ^cache[file_spec](time){code} time=0 no cache
1.65 paf 681: add_native_method("cache", Method::CT_ANY, _cache, 1, 3);
1.63 paf 682:
1.28 parser 683: // switch
684:
685: // ^switch[value]{cases}
686: add_native_method("switch", Method::CT_ANY, _switch, 2, 2);
687:
688: // ^case[value]{code}
1.51 parser 689: add_native_method("case", Method::CT_ANY, _case, 2, 10000);
1.74 paf 690:
691: // try-catch
692:
693: // ^try{code}{catch code}
694: add_native_method("try", Method::CT_ANY, _try_operator, 2, 2);
695: // ^throw[$exception hash]
696: // ^throw[type;source;comment]
697: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
698:
1.10 paf 699: }
1.11 paf 700:
701: // constructor & configurator
1.1 paf 702:
1.127.2.22.2. 4(paf 703:3): VStateless_class& VClassMAIN_create() {
704:3): return *new VClassMAIN;
1.1 paf 705: }
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