--- parser3/src/classes/op.C 2002/03/27 15:30:34 1.78 +++ parser3/src/classes/op.C 2003/11/19 11:00:32 1.136 @@ -1,17 +1,23 @@ /** @file Parser: parser @b operators. - Copyright (c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com) + Copyright (c) 2001-2003 ArtLebedev Group (http://www.artlebedev.com) Author: Alexandr Petrosian (http://paf.design.ru) - - $Id: op.C,v 1.78 2002/03/27 15:30:34 paf Exp $ */ +static const char* IDENT_OP_C="$Date: 2003/11/19 11:00:32 $"; + #include "classes.h" +#include "pa_vmethod_frame.h" + #include "pa_common.h" +#include "pa_os.h" #include "pa_request.h" #include "pa_vint.h" #include "pa_sql_connection.h" +#include "pa_vdate.h" +#include "pa_vmethod_frame.h" +#include "pa_vclass.h" // limits @@ -19,45 +25,80 @@ // defines -#define OP_CLASS_NAME "OP" +#define CASE_DEFAULT_VALUE "DEFAULT" // class -class MOP : public Methoded { +class VClassMAIN: public VClass { public: - MOP(Pool& pool); -public: // Methoded - bool used_directly() { return true; } - void configure_user(Request& r); - -private: - String main_sql_name; - String main_sql_drivers_name; + VClassMAIN(); }; +// defines for statics + +#define SWITCH_DATA_NAME "SWITCH-DATA" +#define CACHE_DATA_NAME "CACHE-DATA" +#define EXCEPTION_VAR_NAME "exception" + +// statics + +//^switch ^case +static const String switch_data_name(SWITCH_DATA_NAME); +//^cache +static const String cache_data_name(CACHE_DATA_NAME); + +static const String exception_var_name(EXCEPTION_VAR_NAME); + +// local defines + +#define CACHE_EXCEPTION_HANDLED_CACHE_NAME "cache" + +// helpers + +class Untaint_lang_name2enum: public Hash { +public: + Untaint_lang_name2enum() { + #define ULN(name, LANG) \ + put(String::Body(name), (value_type)(String::L_##LANG)); + ULN("as-is", AS_IS); + ULN("optimized-as-is", AS_IS|String::L_OPTIMIZE_BIT); + ULN("file-spec", FILE_SPEC); + ULN("http-header", HTTP_HEADER); + ULN("mail-header", MAIL_HEADER); + ULN("uri", URI); + ULN("table", TABLE); + ULN("sql", SQL); + ULN("js", JS); + ULN("xml", XML); + ULN("optimized-xml", XML|String::L_OPTIMIZE_BIT); + ULN("html", HTML); + ULN("optimized-html", HTML|String::L_OPTIMIZE_BIT); + #undef ULN + } +} untaint_lang_name2enum; + // methods -static void _if(Request& r, const String&, MethodParams *params) { - Value& condition_code=params->as_junction(0, "condition must be expression"); +static void _if(Request& r, MethodParams& params) { + Value& condition_code=params.as_junction(0, "condition must be expression"); - bool condition=r.process(condition_code, - 0/*no name*/, + bool condition=r.process_to_value(condition_code, + /*0/*no name* /,*/ false/*don't intercept string*/).as_bool(); if(condition) - r.write_pass_lang(r.process(params->as_junction(1, "'then' parameter must be code"))); - else if(params->size()>2) - r.write_pass_lang(r.process(params->as_junction(2, "'else' parameter must be code"))); + r.write_pass_lang(r.process(params.as_junction(1, "'then' parameter must be code"))); + else if(params.count()>2) + r.write_pass_lang(r.process(params.as_junction(2, "'else' parameter must be code"))); } -static void _untaint(Request& r, const String& method_name, MethodParams *params) { - Pool& pool=r.pool(); +static void _untaint(Request& r, MethodParams& params) { - uchar lang; - if(params->size()==1) - lang=String::UL_AS_IS; // mark as simply 'tainted'. useful in html from sql + String::Language lang; + if(params.count()==1) + lang=String::L_AS_IS; // mark as simply 'tainted'. useful in html from sql else { - const String& lang_name=params->as_string(0, "lang must be string"); - lang=untaint_lang_name2enum->get_int(lang_name); + const String& lang_name=params.as_string(0, "lang must be string"); + lang=untaint_lang_name2enum.get(lang_name); if(!lang) throw Exception(0, &lang_name, @@ -65,22 +106,20 @@ static void _untaint(Request& r, const S } { - Value& vbody=params->as_junction(params->size()-1, "body must be code"); + Value& vbody=params.as_junction(params.count()-1, "body must be code"); Temp_lang temp_lang(r, lang); // set temporarily specified ^untaint[language; r.write_pass_lang(r.process(vbody)); // process marking tainted with that lang } } -static void _taint(Request& r, const String&, MethodParams *params) { - Pool& pool=r.pool(); - - uchar lang; - if(params->size()==1) - lang=String::UL_TAINTED; // mark as simply 'tainted'. useful in table:set +static void _taint(Request& r, MethodParams& params) { + String::Language lang; + if(params.count()==1) + lang=String::L_TAINTED; // mark as simply 'tainted'. useful in table:set else { - const String& lang_name=params->as_string(0, "lang must be string"); - lang=untaint_lang_name2enum->get_int(lang_name); + const String& lang_name=params.as_string(0, "lang must be string"); + lang=untaint_lang_name2enum.get(lang_name); if(!lang) throw Exception(0, &lang_name, @@ -88,9 +127,9 @@ static void _taint(Request& r, const Str } { - Value& vbody=params->as_no_junction(params->size()-1, "body must not be code"); + Value& vbody=params.as_no_junction(params.count()-1, "body must not be code"); - String result(r.pool()); + String result; result.append( vbody.as_string(), // process marking tainted with that lang lang, true); // force result language to specified @@ -98,73 +137,80 @@ static void _taint(Request& r, const Str } } -static void _process(Request& r, const String& method_name, MethodParams *params) { - // calculate pseudo file name of processed chars - // would be something like "/some/file(4) process" - char place[MAX_STRING]; -#ifndef NO_STRING_ORIGIN - const Origin& origin=method_name.origin(); - snprintf(place, MAX_STRING, "%s(%d) %s", - origin.file, 1+origin.line, - method_name.cstr()); -#else - strncpy(place, method_name.cstr(), MAX_STRING-1); place[MAX_STRING-1]=0; -#endif +static void _process(Request& r, MethodParams& params) { + Method* main_method; + + size_t index=0; + Value* target_self; + Value& maybe_target_self=params[index]; + if(maybe_target_self.get_string() || maybe_target_self.get_junction()) + target_self=&r.get_method_frame()->caller()->self(); + else { + target_self=&maybe_target_self; index++; + } - VStateless_class& self_class=*r.self->get_class(); - const Method *main_method; { + VStateless_class *target_class=target_self->get_last_derived_class(); + if(!target_class) + throw Exception("parser.runtime", + 0, + "no target class"); + // temporary remove language change - Temp_lang temp_lang(r, String::UL_PASS_APPENDED); + Temp_lang temp_lang(r, String::L_PASS_APPENDED); // temporary zero @main so to maybe-replace it in processed code - Temp_method temp_method_main(self_class, *main_method_name, 0); + Temp_method temp_method_main(*target_class, main_method_name, 0); // temporary zero @auto so it wouldn't be auto-called in Request::use_buf - Temp_method temp_method_auto(self_class, *auto_method_name, 0); - - // evaluate source to process - const String& source= - r.process(params->as_junction(0, "body must be code")).as_string(); - - // process source code, append processed methods to 'self' class - // maybe-define new @main - r.use_buf( - source.cstr(String::UL_UNSPECIFIED, r.connection(0)), - place, - &self_class); - + Temp_method temp_method_auto(*target_class, auto_method_name, 0); + + size_t main_alias_index=index+1; + const String* main_alias=0; + if(main_alias_indexget_method(main_method_name); } // after restoring current-request-lang // maybe-execute @main[] if(main_method) { + // temporarily set method_frame's self to target_self + Temp_method_frame_self tmfs(*r.get_method_frame(), *target_self); // execute! r.execute(*main_method->parser_code); } } -static void _rem(Request& r, const String&, MethodParams *params) { - params->as_junction(0, "body must be code"); +static void _rem(Request& r, MethodParams& params) { + params.as_junction(0, "body must be code"); } -static void _while(Request& r, const String& method_name, MethodParams *params) { - Pool& pool=r.pool(); - - Value& vcondition=params->as_junction(0, "condition must be expression"); - Value& body=params->as_junction(1, "body must be code"); +static void _while(Request& r, MethodParams& params) { + Value& vcondition=params.as_junction(0, "condition must be expression"); + Value& body=params.as_junction(1, "body must be code"); // while... int endless_loop_count=0; while(true) { if(++endless_loop_count>=MAX_LOOPS) // endless loop? throw Exception("parser.runtime", - &method_name, + 0, "endless loop detected"); - bool condition= - r.process( - vcondition, - 0/*no name*/, + bool condition=r.process_to_value(vcondition, + /*0/*no name* /,*/ false/*don't intercept string*/).as_bool(); if(!condition) // ...condition is true break; @@ -174,77 +220,74 @@ static void _while(Request& r, const Str } } -static void _use(Request& r, const String& method_name, MethodParams *params) { - Value& vfile=params->as_no_junction(0, "file name must not be code"); - r.use_file(vfile.as_string()); +static void _use(Request& r, MethodParams& params) { + Value& vfile=params.as_no_junction(0, "file name must not be code"); + r.use_file(r.main_class, vfile.as_string()); } -static void _for(Request& r, const String& method_name, MethodParams *params) { - Pool& pool=r.pool(); - const String& var_name=params->as_string(0, "var name must be string"); - int from=params->as_int(1, "from must be int", r); - int to=params->as_int(2, "to must be int", r); - Value& body_code=params->as_junction(3, "body must be code"); - Value *delim_maybe_code=params->size()>4?¶ms->get(4):0; +static void _for(Request& r, MethodParams& params) { + const String& var_name=params.as_string(0, "var name must be string"); + int from=params.as_int(1, "from must be int", r); + int to=params.as_int(2, "to must be int", r); + Value& body_code=params.as_junction(3, "body must be code"); + Value* delim_maybe_code=params.count()>4?¶ms[4]:0; if(to-from>=MAX_LOOPS) // too long loop? throw Exception("parser.runtime", - &method_name, + 0, "endless loop detected"); bool need_delim=false; - VInt *vint=new(pool) VInt(pool, 0); + VInt* vint=new VInt(0); + r.get_method_frame()->caller()->put_element(var_name, vint, false); for(int i=from; i<=to; i++) { vint->set_int(i); - r.root->put_element(var_name, vint); - Value& processed_body=r.process(body_code); - if(delim_maybe_code) { // delimiter set? - const String *string=processed_body.get_string(); - if(need_delim && string && string->size()) // need delim & iteration produced string? + StringOrValue sv_processed=r.process(body_code); + const String* s_processed=sv_processed.get_string(); + if(delim_maybe_code && s_processed && s_processed->length()) { // delimiter set and we have body + if(need_delim) // need delim & iteration produced string? r.write_pass_lang(r.process(*delim_maybe_code)); need_delim=true; } - r.write_pass_lang(processed_body); + r.write_pass_lang(sv_processed); } } -static void _eval(Request& r, const String& method_name, MethodParams *params) { - Value& expr=params->as_junction(0, "need expression"); +static void _eval(Request& r, MethodParams& params) { + Value& expr=params.as_junction(0, "need expression"); // evaluate expresion - Value *result=r.process(expr, - 0/*no name YET*/, + Value& value_result=r.process_to_value(expr, + /*0/*no name YET* /,*/ true/*don't intercept string*/).as_expr_result(); - if(params->size()>1) { - Value& fmt=params->as_no_junction(1, "fmt must not be code"); - - Pool& pool=r.pool(); - String& string=*new(pool) String(pool); - string.APPEND_CONST(format(pool, result->as_double(), fmt.as_string().cstr())); - result=new(pool) VString(string); - } - result->set_name(method_name); - r.write_no_lang(*result); + if(params.count()>1) { + Value& fmt=params.as_no_junction(1, "fmt must not be code"); + r.write_no_lang(String(format(value_result.as_double(), fmt.as_string().cstrm()))); + } else + r.write_no_lang(value_result); } -static void _connect(Request& r, const String& method_name, MethodParams *params) { - Pool& pool=r.pool(); +static void _connect(Request& r, MethodParams& params) { #ifdef RESOURCES_DEBUG struct timeval mt[2]; #endif - Value& url=params->as_no_junction(0, "url must not be code"); - Value& body_code=params->as_junction(1, "body must be code"); + Value& url=params.as_no_junction(0, "url must not be code"); + Value& body_code=params.as_junction(1, "body must be code"); - Table *protocol2driver_and_client= - static_cast(r.classes_conf.get(r.OP.name())); + Table* protocol2driver_and_client=0; + if(Value* sql=r.main_class.get_element(String(MAIN_SQL_NAME), r.main_class, false)) { + if(Value* element=sql->get_element(String(MAIN_SQL_DRIVERS_NAME), *sql, false)) { + protocol2driver_and_client=element->get_table(); + } + } #ifdef RESOURCES_DEBUG //measure:before gettimeofday(&mt[0],NULL); #endif // connect - SQL_Connection_ptr connection=SQL_driver_manager->get_connection( - url.as_string(), method_name, protocol2driver_and_client); + SQL_Connection* connection=SQL_driver_manager.get_connection(url.as_string(), + protocol2driver_and_client); #ifdef RESOURCES_DEBUG //measure:after connect @@ -256,79 +299,156 @@ for(int i=0;i<2;i++) r.sql_connect_time+=t[1]-t[0]; #endif - Temp_connection temp_connection(r, connection.get()); + Temp_connection temp_connection(r, connection); // execute body try { r.write_assign_lang(r.process(body_code)); + connection->commit(); + connection->close(); } catch(...) { // process problem - connection->mark_to_rollback(); - /*re*/throw; + connection->rollback(); + connection->close(); + rethrow; } } #ifndef DOXYGEN -struct Switch_data { - Value *searching; - Value *found; - Value *_default; +class Switch_data: public PA_Object { +public: + Request& r; + Value& searching; + Value* found; + Value* _default; +public: + Switch_data(Request& ar, Value& asearching): + r(ar), searching(asearching) {} }; #endif -static void _switch(Request& r, const String&, MethodParams *params) { - void *backup=r.classes_conf.get(*switch_data_name); - Switch_data data={&r.process(params->get(0))}; - r.classes_conf.put(*switch_data_name, &data); - - r.process(params->as_junction(1, "switch cases must be code")); // and ignore result - - r.classes_conf.put(*switch_data_name, backup); - - if(Value *code=data.found ? data.found : data._default) - r.write_pass_lang(r.process(*code)); +static void _switch(Request& r, MethodParams& params) { + Switch_data* data=new Switch_data(r, r.process_to_value(params[0])); + Temp_hash_value + switch_data_setter(r.classes_conf, switch_data_name, data); + + Value& cases_code=params.as_junction(1, "switch cases must be code"); + // execution of found ^case[...]{code} must be in context of ^switch[...]{code} + // because of stacked WWrapper used there as wcontext + r.process(cases_code, true/*intercept_string*/); + if(Value* selected_code=data->found? data->found: data->_default) { + // setting code context, would execute in ^switch[...]{>>context<<} + //selected_code->get_junction()->change_context(cases_code.get_junction()); + r.write_pass_lang(r.process(*selected_code)); + } } -static void _case(Request& r, const String& method_name, MethodParams *params) { - Pool& pool=r.pool(); - - Switch_data *data=static_cast(r.classes_conf.get(*switch_data_name)); +static void _case(Request& r, MethodParams& params) { + Switch_data* data=static_cast(r.classes_conf.get(switch_data_name)); if(!data) throw Exception("parser.runtime", - &method_name, + 0, "without switch"); - int count=params->size(); - Value *code=¶ms->as_junction(--count, "case result must be code"); + int count=params.count(); + Value& code=params.as_junction(--count, "case result must be code"); + + // killing context for safety, would execute in ^switch[...]{>>context<<} + // reason: context is stacked, and it would become invalid afterwards + //code->get_junction()->change_context(0); + for(int i=0; iget(i)); + Value& value=r.process_to_value(params[i]); - if(value.as_string() == *case_default_value) { - data->_default=code; + if(value.as_string() == CASE_DEFAULT_VALUE) { + data->_default=&code; break; } bool matches; - if(data->searching->is_string()) - matches=data->searching->as_string() == value.as_string(); + if(data->searching.is_string()) + matches=data->searching.as_string() == value.as_string(); else - matches=data->searching->as_double() == value.as_double(); + matches=data->searching.as_double() == value.as_double(); if(matches) { - data->found=code; + if(data->found) + throw Exception("parser.runtime", + 0, + "duplicate found"); + + data->found=&code; break; } } } +#ifndef DOXYGEN +struct Try_catch_result { + StringOrValue processed_code; + const String* exception_should_be_handled; + + Try_catch_result(): exception_should_be_handled(0) {} +}; +#endif + +/// used by ^try and ^cache, @returns $exception.handled[string] if any +template +static Try_catch_result try_catch(Request& r, + StringOrValue body_code(Request&, I), I info, + Value* catch_code) +{ + Try_catch_result result; + if(!catch_code) { + result.processed_code=body_code(r, info); + return result; + } + + // taking snapshot of try-context + Request_context_saver try_context(r); + try { + result.processed_code=body_code(r, info); + } catch(const Exception& e) { + Request_context_saver throw_context(r); // taking snapshot of throw-context [stack trace contains error] + Request::Exception_details details=r.get_details(e); + try_context.restore(); // restoring try-context to perform catch-code + + Junction* junction=catch_code->get_junction(); + Value* method_frame=junction->method_frame; + Value* saved_exception_var_value=method_frame->get_element(exception_var_name, *method_frame, false); + junction->method_frame->put_element(exception_var_name, &details.vhash, false); + result.processed_code=r.process(*catch_code); + + // retriving $exception.handled, restoring $exception var + Value* vhandled=details.vhash.hash().get(exception_handled_part_name); + junction->method_frame->put_element(exception_var_name, saved_exception_var_value, false); + + bool bhandled=false; + if(vhandled) { + if(vhandled->is_string()) { // not simple $exception.handled(1/0)? + result.exception_should_be_handled=vhandled->get_string(); // considering 'recovered' and let the caller recover + return result; + } + + bhandled=vhandled->as_bool(); + } + + if(!bhandled) { + throw_context.restore(); // restoring throw-context [exception were not handled] + rethrow; + } + } + return result; +} // cache-- // consts -const int DATA_STRING_SERIALIZED_VERSION=0x0001; +const int DATA_STRING_SERIALIZED_VERSION=0x0005; // helper types #ifndef DOXYGEN struct Data_string_serialized_prolog { int version; + time_t expires; }; #endif @@ -337,88 +457,168 @@ void cache_delete(const String& file_spe } #ifndef DOXYGEN +struct Cache_scope { +public: + time_t expires; + const String* body_from_disk; +}; struct Locked_process_and_cache_put_action_info { Request *r; - Value *body; + Cache_scope *scope; + Value* body_code; Value* catch_code; + const String* processed_code; }; #endif + + + +static StringOrValue process_cache_body_code(Request& r, Value* body_code) { + return StringOrValue(&r.process_to_string(*body_code), 0); +} + +/* @todo maybe network order worth spending some effort? + don't bothering myself with network byte order, + am not planning to be able to move resulting file across platforms +*/ static void locked_process_and_cache_put_action(int f, void *context) { Locked_process_and_cache_put_action_info& info= *static_cast(context); - - // body->process - info.body=&info.r->process(*info.body); - - // result->string - const String& data_string=info.body->as_string(); - // string -serialize> buffer - void *data; size_t data_size; - data_string.serialize( - sizeof(Data_string_serialized_prolog), - data, data_size); - Data_string_serialized_prolog& prolog= - *static_cast(data); - prolog.version=DATA_STRING_SERIALIZED_VERSION; - - // buffer -write> file - write(f, data, data_size); -} -Value *locked_process_and_cache_put(Request& r, - Value& body_code, - const String& file_spec) { - Locked_process_and_cache_put_action_info info={ - &r, - &body_code, - }; + // body->process + Try_catch_result result=try_catch(*info.r, + process_cache_body_code, info.body_code, + info.catch_code); + + if(result.exception_should_be_handled) { + if(*result.exception_should_be_handled==CACHE_EXCEPTION_HANDLED_CACHE_NAME) { + if(const String* body_from_disk=info.scope->body_from_disk) // we have something old? + info.processed_code=body_from_disk; + else + throw Exception(0, + new String("$"EXCEPTION_VAR_NAME"."EXCEPTION_HANDLED_PART_NAME"["CACHE_EXCEPTION_HANDLED_CACHE_NAME"]"), + "fallback failed - there is no old cached body"); + } else + throw Exception("parser.runtime", + result.exception_should_be_handled, + "$"EXCEPTION_VAR_NAME"."EXCEPTION_HANDLED_PART_NAME" value must be " + "either boolean or string '"CACHE_EXCEPTION_HANDLED_CACHE_NAME"'"); + } else + info.processed_code=&result.processed_code.as_string(); + + // expiration time not spoiled by ^cache(0) or something? + if(info.scope->expires > time(0)) { + // string -serialize> buffer + String::Cm serialized=info.processed_code->serialize( + sizeof(Data_string_serialized_prolog)); + Data_string_serialized_prolog& prolog= + *reinterpret_cast(serialized.str); + prolog.version=DATA_STRING_SERIALIZED_VERSION; + prolog.expires=info.scope->expires; + + // buffer -write> file + write(f, serialized.str, serialized.length); + } else // expired! + info.scope->expires=0; // flag it so that could be easily checked by caller +} +const String* locked_process_and_cache_put(Request& r, + Value& body_code, + Value* catch_code, + Cache_scope& scope, + const String& file_spec) +{ + Locked_process_and_cache_put_action_info info={&r, &scope, &body_code, catch_code}; - return file_write_action_under_lock( + const String* result=file_write_action_under_lock( file_spec, "cache_put", locked_process_and_cache_put_action, &info, false/*as_text*/, false/*do_append*/, - false/*block*/) ? info.body : 0; + false/*block*/, + false/*fail on lock problem*/) ? info.processed_code: 0; + time_t now=time(0); + if(scope.expires<=now) + cache_delete(file_spec); + return result; } -String *cache_get(Pool& pool, const String& file_spec) { - void* data; size_t data_size; - if(file_read(pool, file_spec, - data, data_size, +struct Cache_get_result { + const String* body; + bool expired; +} cache_get(Request_charsets& charsets, const String& file_spec, time_t now) { + Cache_get_result result={0}; + + File_read_result file=file_read(charsets, file_spec, false/*as_text*/, - false/*fail_on_read_problem*/) - && data_size/* ignore reads which are empty due to + 0, //no params + false/*fail_on_read_problem*/); + if(file.success && file.length/* ignore reads which are empty due to non-unary open+lockEX conflict with lockSH */) { - + Data_string_serialized_prolog& prolog= - *static_cast(data); + *reinterpret_cast(file.str); - String *result=new(pool) String(pool); + String* body=new String; if( - data_size>=sizeof(Data_string_serialized_prolog) - && prolog.version==DATA_STRING_SERIALIZED_VERSION - && result->deserialize( - sizeof(Data_string_serialized_prolog), data, data_size, file_spec.cstr())) - return result; + file.length>=sizeof(Data_string_serialized_prolog) + && prolog.version==DATA_STRING_SERIALIZED_VERSION) { + if(body->deserialize(sizeof(Data_string_serialized_prolog), file.str, file.length)) { + result.body=body; + result.expired=prolog.expires <= now; + } + } } - return 0; + return result; } -static void _cache(Request& r, const String& method_name, MethodParams *params) { - Pool& pool=r.pool(); +static time_t as_expires(Request& r, MethodParams& params, + int index, time_t now) { + time_t result; + if(Value* vdate=params[index].as(VDATE_TYPE, false)) + result=static_cast(vdate)->get_time(); + else + result=now+(time_t)params.as_double(index, "lifespan must be date or number", r); - // file_spec, expires, body code - const String &file_spec=r.absolute(params->as_string(0, "filespec must be string")); - if(params->size()==1) { // delete - cache_delete(file_spec); + return result; +} +static const String& as_file_spec(Request& r, MethodParams& params, int index) { + return r.absolute(params.as_string(index, "filespec must be string")); +} +static void _cache(Request& r, MethodParams& params) { + time_t now=time(0); + + // ^cache[filename] ^cache(seconds) ^cache[expires date] + if(params.count()==1) { + if(params[0].is_string()) { // filename? + cache_delete(as_file_spec(r, params, 0)); + return; + } + + // secods|expires date + Cache_scope* scope=static_cast(r.classes_conf.get(cache_data_name)); + if(!scope) + throw Exception("parser.runtime", + 0, + "expire-time reducing instruction without cache"); + + time_t expires=as_expires(r, params, 0, now); + if(expires < scope->expires) + scope->expires=expires; + return; } + + // file_spec, expires, body code + const String& file_spec=r.absolute(params.as_string(0, "filespec must be string")); - time_t lifespan=(time_t)params->as_double(1, "lifespan must be number", r); - Value& body_code=params->as_junction(2, "body must be code"); + Cache_scope scope={as_expires(r, params, 1, now)}; - if(lifespan) { // 'lifespan' specified? try cached copy... - size_t size; - time_t atime, mtime, ctime; + Temp_hash_value + cache_scope_setter(r.classes_conf, cache_data_name, &scope); + Value& body_code=params.as_junction(2, "body_code must be code"); + Value* catch_code=0; + if(params.count()>3) + catch_code=¶ms.as_junction(3, "catch_code must be code"); + if(scope.expires>now) { // valid 'expires' specified? try cached copy... // hence we don't hope to have unary create/lockEX // we need some plan to live in a life like that, so... // worst races plan: @@ -435,38 +635,40 @@ static void _cache(Request& r, const Str // ... // |lockSH succeeds; ... - // {file_spec} modification time for(int retry=0; retry<2; retry++) { - if(file_stat(file_spec, size, atime, mtime, ctime, false/*no exception on error*/)) // exists? - if(time(0)-mtime > lifespan) // expired - cache_delete(file_spec); - else // not expired - if(String *cached_body=cache_get(pool, file_spec)) { // have cached copy? - // write it out - r.write_assign_lang(*cached_body); - // happy with it - return; - } - - // non-blocked lock; process; cache it - if(Value *processed_body=locked_process_and_cache_put(r, body_code, file_spec)) { - // write it out - r.write_assign_lang(*processed_body); - // happy with it - return; - } else { // somebody writing result right now - pa_sleep(0, 500000); // waiting half a second - retry=0; // prolonging our wait, than could cache_get it, without processing body_code + Cache_get_result cached=cache_get(r.charsets, file_spec, now); + if(cached.body) { // have cached copy + if(cached.expired) + scope.body_from_disk=cached.body; // storing for user to retrive it with ^cache[] + else // and it's not expired yet + { + // write it out + r.write_assign_lang(*cached.body); + // happy with it + return; + } } + + // non-blocked lock; process; cache it + if(const String* processed_body= + locked_process_and_cache_put(r, body_code, catch_code, scope, file_spec)) { + // write it out + r.write_assign_lang(*processed_body); + // happy with it + return; + } else { // somebody writing result right now + pa_sleep(0, 500000); // waiting half a second + retry=0; // prolonging our wait, than could cache_get it, without processing body_code + } } throw Exception(0, &file_spec, "locking problem"); } else { - // 'lifespan'=0, forget cached copy + // instructed not to cache; forget cached copy cache_delete(file_spec); // process - Value& processed_body=r.process(body_code); + const String& processed_body=r.process_to_string(body_code); // write it out r.write_assign_lang(processed_body); // happy with it @@ -475,118 +677,71 @@ static void _cache(Request& r, const Str // never reached } -// also used in pa_request.C to pass param to @unhandled_exception -VHash& exception2vhash(Pool& pool, const Exception& e) { - VHash& result=*new(pool) VHash(pool); - Hash& hash=result.hash(0); - if(const char *type=e.type()) - hash.put(*exception_type_part_name, new(pool) VString(*new(pool) String(pool, type))); - if(const String *asource=e.problem_source()) { - String& source=*new(pool) String(pool); - source.append(*asource, String::UL_TAINTED, true/*forced*/); - result.set_name(source); - - hash.put(*exception_source_part_name, new(pool) VString(source)); -#ifndef NO_STRING_ORIGIN - const Origin& origin=source.origin(); - hash.put(*new(pool) String(pool, "file"), - new(pool) VString(*new(pool) String(pool, origin.file))); - hash.put(*new(pool) String(pool, "lineno"), - new(pool) VInt(pool, 1+origin.line)); -#endif - } - if(const char *ecomment=e.comment()) { - int comment_size=strlen(ecomment); - char *pcomment=(char *)pool.malloc(comment_size); - memcpy(pcomment, ecomment, comment_size); - hash.put(*exception_comment_part_name, - new(pool) VString(*new(pool) String(pool, pcomment, comment_size, true/*tainted*/))); - } - hash.put(*exception_handled_part_name, - new(pool) VBool(pool, false)); - - return result; +static StringOrValue process_try_body_code(Request& r, Value* body_code) { + return r.process(*body_code); } +static void _try_operator(Request& r, MethodParams& params) { + Value& body_code=params.as_junction(0, "body_code must be code"); + Value& catch_code=params.as_junction(1, "catch_code must be code"); + + Try_catch_result result=try_catch(r, + process_try_body_code, &body_code, + &catch_code); + + if(result.exception_should_be_handled) + throw Exception("parser.runtime", + result.exception_should_be_handled, + "catch block must set $exception.handled to some boolean value, not string"); -static void _try_operator(Request& r, const String& method_name, MethodParams *params) { - Pool& pool=r.pool(); - - Value& body_code=params->as_junction(0, "body_code must be code"); - Value& catch_code=params->as_junction(1, "catch_code must be code"); - - Value *result; - - // taking snapshot of request processing status - //int ssexception_trace=r.exception_trace.top_index(); - int sstack=r.stack.top_index(); - Value *sself=r.self, *sroot=r.root, *srcontext=r.rcontext; - WContext *swcontext=r.wcontext; - try { - result=&r.process(body_code); - } catch(const Exception& e) { - // restoring request processing status - //r.exception_trace.top_index(ssexception_trace); - r.stack.top_index(sstack); - r.self=sself; r.root=sroot, r.rcontext=srcontext; r.wcontext=swcontext; - - - VHash& vhash=exception2vhash(pool, e); + // write out processed body_code or catch_code + r.write_pass_lang(result.processed_code); +} - Junction *junction=catch_code.get_junction(); - Value *saved_exception_var_value=junction->root->get_element(*exception_var_name); - junction->root->put_element(*exception_var_name, &vhash); - result=&r.process(catch_code); - bool handled=false; - if(Value *value=static_cast(vhash.hash(0).get(*exception_handled_part_name))) - handled=value->as_bool(); - junction->root->put_element(*exception_var_name, saved_exception_var_value); - - if(!handled) - throw(e); // rethrow - } - // write it out - r.write_pass_lang(*result); -} - -static void _throw_operator(Request& r, const String& method_name, MethodParams *params) { - Pool& pool=r.pool(); - - if(params->size()==1) { - Value& param0=params->get(0); - if(Hash *hash=param0.get_hash(&method_name)) { - const char *type=0; - if(Value *value=static_cast(hash->get(*exception_type_part_name))) +static void _throw_operator(Request& r, MethodParams& params) { + if(params.count()==1) { + if(HashStringValue *hash=params[0].get_hash()) { + const char* type=0; + if(Value* value=hash->get(exception_type_part_name)) type=value->as_string().cstr(); - const String *source=0; - if(Value *value=static_cast(hash->get(*exception_source_part_name))) + const String* source=0; + if(Value* value=hash->get(exception_source_part_name)) source=&value->as_string(); - const char *comment=0; - if(Value *value= - static_cast(hash->get(*exception_comment_part_name))) + const char* comment; + if(Value* value=hash->get(exception_comment_part_name)) comment=value->as_string().cstr(); throw Exception(type, - source?source:&method_name, - comment); + source?source:0, + "%s", comment?comment:""); } else throw Exception("parser.runtime", - &method_name, + 0, "one-param version has hash param"); } else { - const char *type=params->as_string(0, "type must be string").cstr(); - const String& source=params->as_string(1, "source must be string"); - const char *comment=params->as_string(2, "comment must be string").cstr(); - throw Exception(type, &source, comment); - } + const char* type=params.as_string(0, "type must be string").cstr(); + const String& source=params.as_string(1, "source must be string"); + const char* comment=params.count()>2? params.as_string(2, "comment must be string").cstr() + :0; + throw Exception(type, &source, "%s", comment?comment:""); + } + } + +#if defined(WIN32) && defined(_DEBUG) +# define PA_BPT +static void _bpt(Request& r, MethodParams& params) { + _asm int 3; } - +#endif + // constructor -MOP::MOP(Pool& apool) : Methoded(apool), - main_sql_name(apool, MAIN_SQL_NAME), - main_sql_drivers_name(apool, MAIN_SQL_DRIVERS_NAME) -{ - set_name(*NEW String(pool(), OP_CLASS_NAME)); +VClassMAIN::VClassMAIN(): VClass() { + set_name(*new String(MAIN_CLASS_NAME)); + +#ifdef PA_BPT + // ^bpt[] + add_native_method("bpt", Method::CT_ANY, _bpt, 0, 0); +#endif // ^if(condition){code-when-true} // ^if(condition){code-when-true}{code-when-false} @@ -599,7 +754,7 @@ MOP::MOP(Pool& apool) : Methoded(apool), add_native_method("taint", Method::CT_ANY, _taint, 1, 2); // ^process[code] - add_native_method("process", Method::CT_ANY, _process, 1, 1); + add_native_method("process", Method::CT_ANY, _process, 1, 2); // ^rem{code} add_native_method("rem", Method::CT_ANY, _rem, 1, 10000); @@ -621,9 +776,9 @@ MOP::MOP(Pool& apool) : Methoded(apool), add_native_method("connect", Method::CT_ANY, _connect, 2, 2); + // ^cache[file_spec](time){code}[{catch code}] time=0 no cache // ^cache[file_spec] delete cache - // ^cache[file_spec](time){code} time=0 no cache - add_native_method("cache", Method::CT_ANY, _cache, 1, 3); + add_native_method("cache", Method::CT_ANY, _cache, 1, 4); // switch @@ -645,16 +800,6 @@ MOP::MOP(Pool& apool) : Methoded(apool), // constructor & configurator -Methoded *MOP_create(Pool& pool) { - return new(pool) MOP(pool); -} - -void MOP::configure_user(Request& r) { - Pool& pool=r.pool(); - - // $MAIN:SQL.drivers - if(Value *sql=r.main_class->get_element(main_sql_name)) - if(Value *element=sql->get_element(main_sql_drivers_name)) - if(Table *protocol2library=element->get_table()) - r.classes_conf.put(name(), protocol2library); +VStateless_class& VClassMAIN_create() { + return *new VClassMAIN; }