|
|
| version 1.127.2.22.2.33, 2003/06/26 11:51:30 | version 1.181, 2008/07/08 13:37:30 |
|---|---|
| Line 1 | Line 1 |
| /** @file | /** @file |
| Parser: parser @b operators. | Parser: parser @b operators. |
| Copyright (c) 2001-2003 ArtLebedev Group (http://www.artlebedev.com) | Copyright (c) 2001-2005 ArtLebedev Group (http://www.artlebedev.com) |
| Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru) | Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru) |
| */ | */ |
| static const char* IDENT_OP_C="$Date$"; | static const char * const IDENT_OP_C="$Date$"; |
| #include "classes.h" | #include "classes.h" |
| #include "pa_vmethod_frame.h" | #include "pa_vmethod_frame.h" |
| #include "pa_common.h" | #include "pa_common.h" |
| #include "pa_os.h" | |
| #include "pa_request.h" | #include "pa_request.h" |
| #include "pa_vint.h" | #include "pa_vint.h" |
| #include "pa_sql_connection.h" | #include "pa_sql_connection.h" |
| #include "pa_vdate.h" | #include "pa_vdate.h" |
| #include "pa_vmethod_frame.h" | #include "pa_vmethod_frame.h" |
| #include "pa_vclass.h" | #include "pa_vclass.h" |
| #include "pa_charset.h" | |
| // limits | // limits |
| #define MAX_LOOPS 10000 | #define MAX_LOOPS 20000 |
| // defines | // defines |
| #define CASE_DEFAULT_VALUE "DEFAULT" | #define CASE_DEFAULT_VALUE "DEFAULT" |
| #define PROCESS_MAIN_OPTION_NAME "main" | |
| #define PROCESS_FILE_OPTION_NAME "file" | |
| #define PROCESS_LINENO_OPTION_NAME "lineno" | |
| // class | // class |
| Line 33 public: | Line 38 public: |
| VClassMAIN(); | VClassMAIN(); |
| }; | }; |
| // defines for globals | |
| #define CYCLE_DATA_NAME "CYCLE-DATA" | |
| // globals | |
| //^for & co | |
| String cycle_data_name(CYCLE_DATA_NAME); | |
| // defines for statics | // defines for statics |
| #define SWITCH_DATA_NAME "SWITCH-DATA" | #define SWITCH_DATA_NAME "SWITCH-DATA" |
| #define CACHE_DATA_NAME "CACHE-DATA" | #define CACHE_DATA_NAME "CACHE-DATA" |
| #define EXCEPTION_VAR_NAME "exception" | #define EXCEPTION_VAR_NAME "exception" |
| // statics | // statics |
| Line 48 static const String cache_data_name(CACH | Line 63 static const String cache_data_name(CACH |
| static const String exception_var_name(EXCEPTION_VAR_NAME); | static const String exception_var_name(EXCEPTION_VAR_NAME); |
| // local defines | |
| #define CACHE_EXCEPTION_HANDLED_CACHE_NAME "cache" | |
| // helpers | // helpers |
| class Untaint_lang_name2enum: public Hash<const StringBody, String::Language> { | class Untaint_lang_name2enum: public Hash<const String::Body, String::Language> { |
| public: | public: |
| Untaint_lang_name2enum() { | Untaint_lang_name2enum() { |
| #define ULN(name, LANG) \ | #define ULN(name, LANG) \ |
| put(StringBody(name), (value_type)(String::L_##LANG)); | put(String::Body(name), (value_type)(String::L_##LANG)); |
| ULN("as-is", AS_IS); | ULN("as-is", AS_IS); |
| ULN("optimized-as-is", AS_IS|String::L_OPTIMIZE_BIT); | ULN("optimized-as-is", AS_IS|String::L_OPTIMIZE_BIT); |
| ULN("file-spec", FILE_SPEC); | ULN("file-spec", FILE_SPEC); |
| ULN("http-header", HTTP_HEADER); | ULN("http-header", HTTP_HEADER); |
| ULN("mail-header", MAIL_HEADER); | ULN("mail-header", MAIL_HEADER); |
| ULN("uri", URI); | ULN("uri", URI); |
| ULN("table", TABLE); | |
| ULN("sql", SQL); | ULN("sql", SQL); |
| ULN("js", JS); | ULN("js", JS); |
| ULN("xml", XML); | ULN("xml", XML); |
| ULN("optimized-xml", XML|String::L_OPTIMIZE_BIT); | ULN("optimized-xml", XML|String::L_OPTIMIZE_BIT); |
| ULN("html", HTML); | ULN("html", HTML); |
| ULN("optimized-html", HTML|String::L_OPTIMIZE_BIT); | ULN("optimized-html", HTML|String::L_OPTIMIZE_BIT); |
| ULN("regex", REGEX); | |
| #undef ULN | #undef ULN |
| } | } |
| } untaint_lang_name2enum; | } untaint_lang_name2enum; |
| Line 75 public: | Line 95 public: |
| // methods | // methods |
| static void _if(Request& r, MethodParams& params) { | static void _if(Request& r, MethodParams& params) { |
| Value& condition_code=params.as_junction(0, "condition must be expression"); | bool condition=params.as_bool(0, "condition must be expression", r); |
| bool condition=r.process_to_value(condition_code, | |
| /*0/*no name* /,*/ | |
| false/*don't intercept string*/).as_bool(); | |
| if(condition) | if(condition) |
| r.write_pass_lang(r.process(params.as_junction(1, "'then' parameter must be code"))); | r.write_pass_lang(r.process(*params.get(1))); |
| else if(params.count()>2) | else if(params.count()>2) |
| r.write_pass_lang(r.process(params.as_junction(2, "'else' parameter must be code"))); | r.write_pass_lang(r.process(*params.get(2))); |
| } | } |
| static void _untaint(Request& r, MethodParams& params) { | static String::Language get_untaint_lang(MethodParams& params, int index){ |
| const String& lang_name=params.as_string(index, "lang must be string"); | |
| String::Language lang=untaint_lang_name2enum.get(lang_name); | |
| if(!lang) | |
| throw Exception(0, | |
| &lang_name, | |
| "invalid taint language"); | |
| return lang; | |
| } | |
| static void _untaint(Request& r, MethodParams& params) { | |
| String::Language lang; | String::Language lang; |
| if(params.count()==1) | if(params.count()==1) |
| lang=String::L_AS_IS; // mark as simply 'tainted'. useful in html from sql | lang=String::L_AS_IS; // mark as simply 'as-is'. useful in html from sql |
| else { | else |
| const String& lang_name=params.as_string(0, "lang must be string"); | lang=get_untaint_lang(params, 0); |
| lang=untaint_lang_name2enum.get(lang_name); | |
| if(!lang) | |
| throw Exception(0, | |
| &lang_name, | |
| "invalid taint language"); | |
| } | |
| { | { |
| Value& vbody=params.as_junction(params.count()-1, "body must be code"); | Value& vbody=params.as_junction(params.count()-1, "body must be code"); |
| Line 111 static void _untaint(Request& r, MethodP | Line 130 static void _untaint(Request& r, MethodP |
| static void _taint(Request& r, MethodParams& params) { | static void _taint(Request& r, MethodParams& params) { |
| String::Language lang; | String::Language lang; |
| if(params.count()==1) | if(params.count()==1) |
| lang=String::L_TAINTED; // mark as simply 'tainted'. useful in table:set | lang=String::L_TAINTED; // mark as simply 'tainted'. useful in table:create |
| else { | else |
| const String& lang_name=params.as_string(0, "lang must be string"); | lang=get_untaint_lang(params, 0); |
| lang=untaint_lang_name2enum.get(lang_name); | |
| if(!lang) | |
| throw Exception(0, | |
| &lang_name, | |
| "invalid taint language"); | |
| } | |
| { | { |
| Value& vbody=params.as_no_junction(params.count()-1, "body must not be code"); | Value& vbody=params.as_no_junction(params.count()-1, "body must not be code"); |
| Line 147 static void _process(Request& r, MethodP | Line 160 static void _process(Request& r, MethodP |
| { | { |
| VStateless_class *target_class=target_self->get_last_derived_class(); | VStateless_class *target_class=target_self->get_last_derived_class(); |
| if(!target_class) | if(!target_class) |
| throw Exception("parser.runtime", | throw Exception(PARSER_RUNTIME, |
| 0, | 0, |
| "no target class"); | "no target class"); |
| Line 158 static void _process(Request& r, MethodP | Line 171 static void _process(Request& r, MethodP |
| // temporary zero @auto so it wouldn't be auto-called in Request::use_buf | // temporary zero @auto so it wouldn't be auto-called in Request::use_buf |
| Temp_method temp_method_auto(*target_class, auto_method_name, 0); | Temp_method temp_method_auto(*target_class, auto_method_name, 0); |
| size_t main_alias_index=index+1; | size_t options_index=index+1; |
| const String* main_alias=0; | HashStringValue* options=0; |
| if(main_alias_index<params.count()) | if(options_index<params.count()) { |
| main_alias=¶ms.as_string(main_alias_index, "main alias must be string"); | Value& voptions=params.as_no_junction(options_index, "options must not be code"); |
| options=voptions.get_hash(); | |
| if(!options) | |
| throw Exception(PARSER_RUNTIME, | |
| 0, | |
| "options must be hash"); | |
| } | |
| if(const String* file_name=params[index].get_string()) { // ^process...[file] | const String* main_alias=0; |
| r.use_file(*target_class, r.absolute(*file_name), main_alias, true/*ignore_class_path*/); | const String* file_alias=0; |
| } else { // process...{string} | int line_no_alias_offset=0; |
| Value& vjunction=params.as_junction(index, "body must be code"); | if(options) { |
| // evaluate source to process | int valid_options=0; |
| const String& source=r.process_to_string(vjunction); | if(Value* vmain_alias=options->get(PROCESS_MAIN_OPTION_NAME)) { |
| r.use_buf(*target_class, | valid_options++; |
| source.cstr(String::L_UNSPECIFIED, r.connection(false)), | main_alias=&vmain_alias->as_string(); |
| main_alias, | } |
| pseudo_file_no__process); | if(Value* vfile_alias=options->get(PROCESS_FILE_OPTION_NAME)) { |
| valid_options++; | |
| file_alias=&vfile_alias->as_string(); | |
| } | |
| if(Value* vline_no_alias_offset=options->get(PROCESS_LINENO_OPTION_NAME)) { | |
| valid_options++; | |
| line_no_alias_offset=vline_no_alias_offset->as_int(); | |
| } | |
| if(valid_options!=options->count()) | |
| throw Exception(PARSER_RUNTIME, | |
| 0, | |
| "called with invalid option"); | |
| } | } |
| uint processe_file_no=file_alias? | |
| r.register_file(r.absolute(*file_alias)) | |
| : pseudo_file_no__process; | |
| // process...{string} | |
| Value& vjunction=params.as_junction(index, "body must be code"); | |
| // evaluate source to process | |
| const String& source=r.process_to_string(vjunction); | |
| r.use_buf(*target_class, | |
| source.cstr(String::L_UNSPECIFIED, r.connection(false)), | |
| main_alias, | |
| processe_file_no, | |
| line_no_alias_offset); | |
| // main_method | // main_method |
| main_method=target_class->get_method(main_method_name); | main_method=target_class->get_method(main_method_name); |
| } | } |
| Line 188 static void _process(Request& r, MethodP | Line 232 static void _process(Request& r, MethodP |
| } | } |
| } | } |
| static void _rem(Request& r, MethodParams& params) { | static void _rem(Request&, MethodParams& params) { |
| params.as_junction(0, "body must be code"); | params.as_junction(0, "body must be code"); |
| } | } |
| static void _while(Request& r, MethodParams& params) { | static void _while(Request& r, MethodParams& params) { |
| Value& vcondition=params.as_junction(0, "condition must be expression"); | Temp_hash_value<const String::Body, void*> |
| Value& body=params.as_junction(1, "body must be code"); | cycle_data_setter(r.classes_conf, cycle_data_name, /*any not null flag*/&r); |
| Value& vcondition=params.as_expression(0, "condition must be number, bool or expression"); | |
| Value& body_code=params.as_junction(1, "body must be code"); | |
| Value* delim_maybe_code=params.count()>2?¶ms[2]:0; | |
| // while... | // while... |
| int endless_loop_count=0; | int endless_loop_count=0; |
| bool need_delim=false; | |
| while(true) { | while(true) { |
| if(++endless_loop_count>=MAX_LOOPS) // endless loop? | if(++endless_loop_count>=MAX_LOOPS) // endless loop? |
| throw Exception("parser.runtime", | throw Exception(PARSER_RUNTIME, |
| 0, | 0, |
| "endless loop detected"); | "endless loop detected"); |
| bool condition=r.process_to_value(vcondition, | bool condition=r.process_to_value(vcondition, |
| /*0/*no name* /,*/ | |
| false/*don't intercept string*/).as_bool(); | false/*don't intercept string*/).as_bool(); |
| if(!condition) // ...condition is true | if(!condition) // ...condition is true |
| break; | break; |
| // write processed body | StringOrValue sv_processed=r.process(body_code); |
| r.write_pass_lang(r.process(body)); | Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING); |
| 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)); | |
| else | |
| need_delim=true; | |
| } | |
| r.write_pass_lang(sv_processed); | |
| if(lskip==Request::SKIP_BREAK) | |
| break; | |
| } | } |
| } | } |
| static void _use(Request& r, MethodParams& params) { | static void _use(Request& r, MethodParams& params) { |
| Value& vfile=params.as_no_junction(0, "file name must not be code"); | Value& vfile=params.as_no_junction(0, FILE_NAME_MUST_NOT_BE_CODE); |
| r.use_file(r.main_class, vfile.as_string()); | r.use_file(r.main_class, vfile.as_string()); |
| } | } |
| static void set_skip(Request& r, Request::Skip askip) { | |
| void* data=r.classes_conf.get(cycle_data_name); | |
| if(!data) | |
| throw Exception(PARSER_RUNTIME, | |
| 0, | |
| "without cycle"); | |
| r.set_skip(askip); | |
| } | |
| static void _break(Request& r, MethodParams&) { | |
| set_skip(r, Request::SKIP_BREAK); | |
| } | |
| static void _continue(Request& r, MethodParams&) { | |
| set_skip(r, Request::SKIP_CONTINUE); | |
| } | |
| static void _for(Request& r, MethodParams& params) { | static void _for(Request& r, MethodParams& params) { |
| Temp_hash_value<const String::Body, void*> | |
| cycle_data_setter(r.classes_conf, cycle_data_name, /*any not null flag*/&r); | |
| const String& var_name=params.as_string(0, "var name must be string"); | 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 from=params.as_int(1, "from must be int", r); |
| int to=params.as_int(2, "to must be int", r); | int to=params.as_int(2, "to must be int", r); |
| Line 228 static void _for(Request& r, MethodParam | Line 309 static void _for(Request& r, MethodParam |
| Value* delim_maybe_code=params.count()>4?¶ms[4]:0; | Value* delim_maybe_code=params.count()>4?¶ms[4]:0; |
| if(to-from>=MAX_LOOPS) // too long loop? | if(to-from>=MAX_LOOPS) // too long loop? |
| throw Exception("parser.runtime", | throw Exception(PARSER_RUNTIME, |
| 0, | 0, |
| "endless loop detected"); | "endless loop detected"); |
| bool need_delim=false; | bool need_delim=false; |
| VInt* vint=new VInt(0); | VInt* vint=new VInt(0); |
| r.get_method_frame()->caller()->put_element(var_name, vint, false); | |
| VMethodFrame& caller=*r.get_method_frame()->caller(); | |
| caller.put_element(caller, var_name, vint, false); | |
| for(int i=from; i<=to; i++) { | for(int i=from; i<=to; i++) { |
| vint->set_int(i); | vint->set_int(i); |
| StringOrValue sv_processed=r.process(body_code); | StringOrValue sv_processed=r.process(body_code); |
| Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING); | |
| const String* s_processed=sv_processed.get_string(); | const String* s_processed=sv_processed.get_string(); |
| if(delim_maybe_code && s_processed && s_processed->length()) { // delimiter set and we have body | if(delim_maybe_code && s_processed && s_processed->length()) { // delimiter set and we have body |
| if(need_delim) // need delim & iteration produced string? | if(need_delim) // need delim & iteration produced string? |
| r.write_pass_lang(r.process(*delim_maybe_code)); | r.write_pass_lang(r.process(*delim_maybe_code)); |
| need_delim=true; | else |
| need_delim=true; | |
| } | } |
| r.write_pass_lang(sv_processed); | r.write_pass_lang(sv_processed); |
| if(lskip==Request::SKIP_BREAK) | |
| break; | |
| } | } |
| } | } |
| Line 253 static void _eval(Request& r, MethodPara | Line 341 static void _eval(Request& r, MethodPara |
| Value& expr=params.as_junction(0, "need expression"); | Value& expr=params.as_junction(0, "need expression"); |
| // evaluate expresion | // evaluate expresion |
| Value& value_result=r.process_to_value(expr, | Value& value_result=r.process_to_value(expr, |
| /*0/*no name YET* /,*/ | false/*don't intercept string*/).as_expr_result(); |
| true/*don't intercept string*/).as_expr_result(); | |
| if(params.count()>1) { | if(params.count()>1) { |
| Value& fmt=params.as_no_junction(1, "fmt must not be code"); | const String& fmt=params.as_string(1, "fmt must be string").trim(); |
| r.write_no_lang(String(format(value_result.as_double(), fmt.as_string().cstrm()))); | if(fmt.is_empty()){ |
| r.write_no_lang(value_result); | |
| } else { | |
| r.write_no_lang(String(format(value_result.as_double(), fmt.cstrm()))); | |
| } | |
| } else | } else |
| r.write_no_lang(value_result); | r.write_no_lang(value_result); |
| } | } |
| Line 281 struct timeval mt[2]; | Line 372 struct timeval mt[2]; |
| gettimeofday(&mt[0],NULL); | gettimeofday(&mt[0],NULL); |
| #endif | #endif |
| // connect | // connect |
| SQL_Connection* connection=SQL_driver_manager.get_connection(url.as_string(), | SQL_Connection* connection=SQL_driver_manager->get_connection(url.as_string(), |
| protocol2driver_and_client); | protocol2driver_and_client, |
| r.charsets.source().NAME().cstr(), | |
| r.request_info.document_root); | |
| #ifdef RESOURCES_DEBUG | #ifdef RESOURCES_DEBUG |
| //measure:after connect | //measure:after connect |
| Line 298 r.sql_connect_time+=t[1]-t[0]; | Line 391 r.sql_connect_time+=t[1]-t[0]; |
| // execute body | // execute body |
| try { | try { |
| r.write_assign_lang(r.process(body_code)); | r.write_assign_lang(r.process(body_code)); |
| connection->commit(); | |
| connection->close(); | |
| } catch(...) { // process problem | } catch(...) { // process problem |
| connection->mark_to_rollback(); | connection->rollback(); |
| rethrow; | connection->close(); |
| rethrow; | |
| } | } |
| } | } |
| Line 308 r.sql_connect_time+=t[1]-t[0]; | Line 404 r.sql_connect_time+=t[1]-t[0]; |
| class Switch_data: public PA_Object { | class Switch_data: public PA_Object { |
| public: | public: |
| Request& r; | Request& r; |
| Value& searching; | const String* searching_string; |
| double searching_double; | |
| Value* found; | Value* found; |
| Value* _default; | Value* _default; |
| public: | public: |
| Switch_data(Request& ar, Value& asearching): | Switch_data(Request& ar, Value& asearching): |
| r(ar), searching(asearching) {} | r(ar) |
| { | |
| if(asearching.is_string() || asearching.is_void()){ | |
| searching_string=&asearching.as_string(); | |
| searching_double=0; | |
| } else { | |
| searching_string=0; | |
| searching_double=asearching.as_double(); | |
| } | |
| } | |
| }; | }; |
| #endif | #endif |
| static void _switch(Request& r, MethodParams& params) { | static void _switch(Request& r, MethodParams& params) { |
| Switch_data* data=new Switch_data(r, r.process_to_value(params[0])); | Switch_data* data=new Switch_data(r, r.process_to_value(params[0])); |
| Temp_hash_value<const StringBody, PA_Object*> | Temp_hash_value<const String::Body, void*> |
| switch_data_setter(r.classes_conf, switch_data_name, data); | switch_data_setter(r.classes_conf, switch_data_name, data); |
| Value& cases_code=params.as_junction(1, "switch cases must be code"); | Value& cases_code=params.as_junction(1, "switch cases must be code"); |
| // execution of found ^case[...]{code} must be in context of ^switch[...]{code} | // execution of found ^case[...]{code} must be in context of ^switch[...]{code} |
| // because of stacked WWrapper used there as wcontext | // because of stacked WWrapper used there as wcontext |
| r.process(cases_code, true/*intercept_string*/); | r.process(cases_code, true/*intercept_string*/); |
| if(Value* selected_code=data->found? data->found: data->_default) { | 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)); | r.write_pass_lang(r.process(*selected_code)); |
| } | |
| } | } |
| static void _case(Request& r, MethodParams& params) { | static void _case(Request& r, MethodParams& params) { |
| Switch_data* data=static_cast<Switch_data*>(r.classes_conf.get(switch_data_name)); | Switch_data* data=static_cast<Switch_data*>(r.classes_conf.get(switch_data_name)); |
| if(!data) | if(!data) |
| throw Exception("parser.runtime", | throw Exception(PARSER_RUNTIME, |
| 0, | 0, |
| "without switch"); | "without switch"); |
| if(data->found) // matches already was found | |
| return; | |
| int count=params.count(); | int count=params.count(); |
| Value& code=params.as_junction(--count, "case result must be code"); | Value& code=params.as_junction(--count, "case result must be code"); |
| // killing context for safety, would execute in ^switch[...]{>>context<<} | for(int i=0; i<count; i++){ |
| // reason: context is stacked, and it would become invalid afterwards | |
| //code->get_junction()->change_context(0); | |
| for(int i=0; i<count; i++) { | |
| Value& value=r.process_to_value(params[i]); | Value& value=r.process_to_value(params[i]); |
| if(value.as_string() == CASE_DEFAULT_VALUE) { | if(value.is_string() && value.as_string() == CASE_DEFAULT_VALUE){ |
| data->_default=&code; | data->_default=&code; |
| break; | continue; |
| } | } |
| bool matches; | bool matches; |
| if(data->searching.is_string()) | if(data->searching_string) |
| matches=data->searching.as_string() == value.as_string(); | matches=(*data->searching_string) == value.as_string(); |
| else | else |
| matches=data->searching.as_double() == value.as_double(); | matches=data->searching_double == value.as_double(); |
| if(matches) { | |
| if(data->found) | |
| throw Exception("parser.runtime", | |
| 0, | |
| "duplicate found"); | |
| if(matches){ | |
| data->found=&code; | data->found=&code; |
| break; | 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<class I> | |
| static Try_catch_result try_catch(Request& r, | |
| StringOrValue body_code(Request&, I), I info, | |
| Value* catch_code, | |
| bool could_be_handled_by_caller=false) | |
| { | |
| 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); | |
| VMethodFrame& frame=*junction->method_frame; | |
| frame.put_element(frame, 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); | |
| frame.put_element(frame, exception_var_name, saved_exception_var_value, false); | |
| bool bhandled=false; | |
| if(vhandled) { | |
| if(vhandled->is_string()) { // not simple $exception.handled(1/0)? | |
| if(could_be_handled_by_caller) { // and we can possibly handle it | |
| result.exception_should_be_handled=vhandled->get_string(); // considering 'recovered' and let the caller recover | |
| return result; | |
| } | |
| bhandled=false; | |
| } else | |
| bhandled=vhandled->as_bool(); | |
| } | |
| if(!bhandled) { | |
| throw_context.restore(); // restoring throw-context [exception were not handled] | |
| rethrow; | |
| } | |
| } | |
| return result; | |
| } | |
| // cache-- | // cache-- |
| // consts | // consts |
| const int DATA_STRING_SERIALIZED_VERSION=0x0004; | const int DATA_STRING_SERIALIZED_VERSION=0x0006; |
| // helper types | // helper types |
| Line 388 struct Data_string_serialized_prolog { | Line 550 struct Data_string_serialized_prolog { |
| #endif | #endif |
| void cache_delete(const String& file_spec) { | void cache_delete(const String& file_spec) { |
| file_delete(file_spec, false/*fail_on_read_problem*/); | file_delete(file_spec, false/*fail_on_problem*/); |
| } | } |
| #ifndef DOXYGEN | #ifndef DOXYGEN |
| class Cache_data: public PA_Object { | struct Cache_scope { |
| public: | public: |
| time_t expires; | time_t expires; |
| const String* body_from_disk; | |
| }; | }; |
| struct Locked_process_and_cache_put_action_info { | struct Locked_process_and_cache_put_action_info { |
| Request *r; | Request *r; |
| Cache_data *data; | Cache_scope *scope; |
| Value* body_code; const String* evaluated_body; | Value* body_code; |
| Value* catch_code; | |
| const String* processed_code; | |
| }; | }; |
| #endif | #endif |
| static StringOrValue process_cache_body_code(Request& r, Value* body_code) { | |
| return StringOrValue(r.process_to_string(*body_code)); | |
| } | |
| /* @todo maybe network order worth spending some effort? | /* @todo maybe network order worth spending some effort? |
| don't bothering myself with network byte order, | don't bothering myself with network byte order, |
| am not planning to be able to move resulting file across platforms | am not planning to be able to move resulting file across platforms |
| Line 410 static void locked_process_and_cache_put | Line 582 static void locked_process_and_cache_put |
| Locked_process_and_cache_put_action_info& info= | Locked_process_and_cache_put_action_info& info= |
| *static_cast<Locked_process_and_cache_put_action_info *>(context); | *static_cast<Locked_process_and_cache_put_action_info *>(context); |
| const String* body_from_disk=info.scope->body_from_disk; | |
| // body->process | // body->process |
| info.evaluated_body=&info.r->process_to_string(*info.body_code); | Try_catch_result result=try_catch(*info.r, |
| process_cache_body_code, info.body_code, | |
| info.catch_code, body_from_disk!=0 /*we have something old=we can handle=recover later*/); | |
| if(result.exception_should_be_handled) { | |
| if(*result.exception_should_be_handled==CACHE_EXCEPTION_HANDLED_CACHE_NAME) { | |
| assert(body_from_disk); | |
| info.processed_code=body_from_disk; | |
| } 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? | // expiration time not spoiled by ^cache(0) or something? |
| if(info.data->expires > time(0)) { | if(info.scope->expires > time(0)) { |
| // string -serialize> buffer | // string -serialize> buffer |
| String::Cm serialized=info.evaluated_body->serialize( | String::Cm serialized=info.processed_code->serialize( |
| sizeof(Data_string_serialized_prolog)); | sizeof(Data_string_serialized_prolog)); |
| Data_string_serialized_prolog& prolog= | Data_string_serialized_prolog& prolog= |
| *reinterpret_cast<Data_string_serialized_prolog *>(serialized.str); | *reinterpret_cast<Data_string_serialized_prolog *>(serialized.str); |
| prolog.version=DATA_STRING_SERIALIZED_VERSION; | prolog.version=DATA_STRING_SERIALIZED_VERSION; |
| prolog.expires=info.data->expires; | prolog.expires=info.scope->expires; |
| // buffer -write> file | // buffer -write> file |
| write(f, serialized.str, serialized.length); | write(f, serialized.str, serialized.length); |
| } else // expired! | } else // expired! |
| info.data->expires=0; // flag it so that could be easily checked by caller | info.scope->expires=0; // flag it so that could be easily checked by caller |
| } | } |
| const String* locked_process_and_cache_put(Request& r, | const String* locked_process_and_cache_put(Request& r, |
| Value& body_code, | Value& body_code, |
| Cache_data& data, | Value* catch_code, |
| const String& file_spec) { | Cache_scope& scope, |
| Locked_process_and_cache_put_action_info info={0}; | const String& file_spec) |
| info.r=&r; | { |
| info.data=&data; | Locked_process_and_cache_put_action_info info={&r, &scope, &body_code, catch_code, 0}; |
| info.body_code=&body_code; | |
| const String* result=file_write_action_under_lock( | const String* result=file_write_action_under_lock( |
| file_spec, | file_spec, |
| "cache_put", locked_process_and_cache_put_action, &info, | "cache_put", |
| locked_process_and_cache_put_action, | |
| &info, | |
| false/*as_text*/, | false/*as_text*/, |
| false/*do_append*/, | false/*do_append*/, |
| false/*block*/, | false/*block == don't wait till other thread release lock*/, |
| false/*fail on lock problem*/) ? info.evaluated_body: 0; | false/*dun throw exception if lock failed*/) ? info.processed_code: 0; |
| time_t now=time(0); | time_t now=time(0); |
| if(data.expires<=now) | if(scope.expires<=now) |
| cache_delete(file_spec); | cache_delete(file_spec); |
| return result; | return result; |
| } | } |
| const String* cache_get(Request_charsets& charsets, const String& file_spec, time_t now) { | #ifndef DOXYGEN |
| struct Cache_get_result { | |
| const String* body; | |
| bool expired; | |
| }; | |
| #endif | |
| static Cache_get_result cache_get(Request_charsets& charsets, const String& file_spec, time_t now) { | |
| Cache_get_result result={0, false}; | |
| File_read_result file=file_read(charsets, file_spec, | File_read_result file=file_read(charsets, file_spec, |
| false/*as_text*/, | false/*as_text*/, |
| 0, //no params | 0, //no params |
| Line 460 const String* cache_get(Request_charsets | Line 657 const String* cache_get(Request_charsets |
| Data_string_serialized_prolog& prolog= | Data_string_serialized_prolog& prolog= |
| *reinterpret_cast<Data_string_serialized_prolog *>(file.str); | *reinterpret_cast<Data_string_serialized_prolog *>(file.str); |
| String* result=new String; | String* body=new String; |
| if( | if( |
| file.length>=sizeof(Data_string_serialized_prolog) | file.length>=sizeof(Data_string_serialized_prolog) |
| && prolog.version==DATA_STRING_SERIALIZED_VERSION | && prolog.version==DATA_STRING_SERIALIZED_VERSION) { |
| && prolog.expires > now | if(body->deserialize(sizeof(Data_string_serialized_prolog), file.str, file.length)) { |
| && result->deserialize(sizeof(Data_string_serialized_prolog), file.str, file.length)) | result.body=body; |
| return result; | result.expired=prolog.expires <= now; |
| } | |
| } | |
| } | } |
| return 0; | return result; |
| } | } |
| static time_t as_expires(Request& r, MethodParams& params, | static time_t as_expires(Request& r, MethodParams& params, |
| int index, time_t now) { | int index, time_t now) { |
| Line 485 static const String& as_file_spec(Reques | Line 684 static const String& as_file_spec(Reques |
| return r.absolute(params.as_string(index, "filespec must be string")); | return r.absolute(params.as_string(index, "filespec must be string")); |
| } | } |
| static void _cache(Request& r, MethodParams& params) { | static void _cache(Request& r, MethodParams& params) { |
| if(params.count()==0) { | |
| // ^cache[] -- return current expiration time | |
| Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name)); | |
| if(!scope) | |
| throw Exception(PARSER_RUNTIME, | |
| 0, | |
| "expire-time get without cache"); | |
| r.write_no_lang(*new VDate(scope->expires)); | |
| return; | |
| } | |
| time_t now=time(0); | time_t now=time(0); |
| // ^cache[filename] ^cache(seconds) ^cache[expires date] | |
| if(params.count()==1) { | if(params.count()==1) { |
| // ^cache[filename] ^cache(seconds) ^cache[expires date] | |
| if(params[0].is_string()) { // filename? | if(params[0].is_string()) { // filename? |
| cache_delete(as_file_spec(r, params, 0)); | cache_delete(as_file_spec(r, params, 0)); |
| return; | return; |
| } | } |
| // secods|expires date | // secods|expires date |
| Cache_data* data=static_cast<Cache_data*>(r.classes_conf.get(cache_data_name)); | Cache_scope* scope=static_cast<Cache_scope*>(r.classes_conf.get(cache_data_name)); |
| if(!data) | if(!scope) |
| throw Exception("parser.runtime", | throw Exception(PARSER_RUNTIME, |
| 0, | 0, |
| "expire-time reducing instruction without cache"); | "expire-time reducing instruction without cache"); |
| time_t expires=as_expires(r, params, 0, now); | time_t expires=as_expires(r, params, 0, now); |
| if(expires < data->expires) | if(expires < scope->expires) |
| data->expires=expires; | scope->expires=expires; |
| return; | return; |
| } | } else if(params.count()<3) |
| throw Exception(PARSER_RUNTIME, | |
| 0, | |
| "invalid number of parameters"); | |
| // file_spec, expires, body code | // file_spec, expires, body code |
| const String& file_spec=r.absolute(params.as_string(0, "filespec must be string")); | const String& file_spec=as_file_spec(r, params, 0); |
| Cache_data* data=new Cache_data; | Cache_scope scope={as_expires(r, params, 1, now), 0}; |
| Temp_hash_value<const StringBody, PA_Object*> | |
| cache_data_setter(r.classes_conf, cache_data_name, data); | |
| data->expires=as_expires(r, params, 1, now); | |
| Value& body_code=params.as_junction(2, "body must be code"); | |
| if(data->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: | |
| // A B | |
| // open | |
| // |open | |
| // lockSH | |
| // |nonblocking-lockEX fails | |
| // unlockSH | |
| // close, cache_get returns 0 | |
| // open | |
| // nonblocking-lockEX succeeds; process, write, close | |
| // |retry1: open | |
| // ... | |
| // |lockSH succeeds; ... | |
| for(int retry=0; retry<2; retry++) { | |
| if(const String* cached_body=cache_get(r.charsets, file_spec, now)) { // have cached copy? | |
| // write it out | |
| r.write_assign_lang(*cached_body); | |
| // happy with it | |
| return; | |
| } | |
| // non-blocked lock; process; cache it | Temp_hash_value<const String::Body, void*> |
| if(const String* processed_body= | cache_scope_setter(r.classes_conf, cache_data_name, &scope); |
| locked_process_and_cache_put(r, body_code, *data, file_spec)) { | Value& body_code=params.as_junction(2, "body_code must be code"); |
| // write it out | Value* catch_code=0; |
| r.write_assign_lang(*processed_body); | if(params.count()>3) |
| // happy with it | catch_code=¶ms.as_junction(3, "catch_code must be code"); |
| return; | |
| } else { // somebody writing result right now | if(scope.expires>now) { |
| pa_sleep(0, 500000); // waiting half a second | Cache_get_result cached=cache_get(r.charsets, file_spec, now); |
| retry=0; // prolonging our wait, than could cache_get it, without processing body_code | |
| } | 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; | |
| } | |
| } | |
| // no cached info or it's already expired | |
| // trying to process it under lock and store result in file | |
| const String* processed_body=locked_process_and_cache_put(r, body_code, catch_code, scope, file_spec); | |
| if(processed_body){ | |
| // write it out | |
| r.write_assign_lang(*processed_body); | |
| // happy with it | |
| return; | |
| } else { | |
| // we fail while get exclusive lock. nvm, we just execute body_code a bit later | |
| } | } |
| throw Exception(0, | |
| &file_spec, | |
| "locking problem"); | |
| } else { | } else { |
| // instructed not to cache; forget cached copy | // instructed not to cache; forget cached copy |
| cache_delete(file_spec); | cache_delete(file_spec); |
| // process | |
| const String& processed_body=r.process_to_string(body_code); | |
| // write it out | |
| r.write_assign_lang(processed_body); | |
| // happy with it | |
| return; | |
| } | } |
| // never reached | |
| // process without cacheing | |
| const String& processed_body=r.process_to_string(body_code); | |
| // write it out | |
| r.write_assign_lang(processed_body); | |
| } | } |
| static StringOrValue process_try_body_code(Request& r, Value* body_code) { | |
| return r.process(*body_code); | |
| // also used in pa_request.C to pass param to @unhandled_exception | } |
| static void _try_operator(Request& r, MethodParams& params) { | static void _try_operator(Request& r, MethodParams& params) { |
| Value& body_code=params.as_junction(0, "body_code must be code"); | 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& catch_code=params.as_junction(1, "catch_code must be code"); |
| Value* finally_code=(params.count()==3) ? ¶ms.as_junction(2, "finally_code must be code") : 0; | |
| StringOrValue result; | Try_catch_result result; |
| // taking snapshot of try-context | StringOrValue finally_result; |
| Request_context_saver try_context(r); | try{ |
| try { | result=try_catch(r, |
| result=r.process(body_code); | process_try_body_code, &body_code, |
| } catch(const Exception& e) { | &catch_code); |
| Request::Exception_details details=r.get_details(e); | if(result.exception_should_be_handled) |
| throw Exception(PARSER_RUNTIME, | |
| Request_context_saver throw_context(r); // taking snapshot of throw-context [stack trace contains error] | result.exception_should_be_handled, |
| try_context.restore(); // restoring try-context to perform catch-code | "catch block must set $exception.handled to some boolean value, not string"); |
| } catch(...){ | |
| Junction* junction=catch_code.get_junction(); | if(finally_code) |
| Value* method_frame=junction->method_frame; | finally_result=r.process(*finally_code); |
| Value* saved_exception_var_value=method_frame->get_element(exception_var_name, *method_frame, false); | rethrow; |
| junction->method_frame->put_element(exception_var_name, &details.vhash, false); | } |
| result=r.process(catch_code); | |
| bool handled=false; | if(finally_code) |
| if(Value* value= | finally_result=r.process(*finally_code); |
| details.vhash.hash().get(exception_handled_part_name)) | |
| handled=value->as_bool(); | // write out processed body_code or catch_code |
| junction->method_frame->put_element(exception_var_name, saved_exception_var_value, false); | r.write_pass_lang(result.processed_code); |
| if(!handled) { | // write out processed finally code |
| throw_context.restore(); // restoring throw-context [exception were not handled] | if(finally_code) |
| rethrow; | r.write_pass_lang(finally_result); |
| } | |
| } | |
| // write out result | |
| r.write_pass_lang(result); | |
| } | } |
| static void _throw_operator(Request& r, MethodParams& params) { | static void _throw_operator(Request&, MethodParams& params) { |
| if(params.count()==1) { | if(params.count()==1 && !params[0].is_string()) { |
| if(HashStringValue *hash=params[0].get_hash()) { | if(HashStringValue *hash=params[0].get_hash()) { |
| const char* type=0; | const char* type=0; |
| if(Value* value=hash->get(exception_type_part_name)) | if(Value* value=hash->get(exception_type_part_name)) |
| Line 618 static void _throw_operator(Request& r, | Line 814 static void _throw_operator(Request& r, |
| const String* source=0; | const String* source=0; |
| if(Value* value=hash->get(exception_source_part_name)) | if(Value* value=hash->get(exception_source_part_name)) |
| source=&value->as_string(); | source=&value->as_string(); |
| const char* comment; | const char* comment=0; |
| if(Value* value=hash->get(exception_comment_part_name)) | if(Value* value=hash->get(exception_comment_part_name)) |
| comment=value->as_string().cstr(); | comment=value->as_string().cstr(); |
| Line 626 static void _throw_operator(Request& r, | Line 822 static void _throw_operator(Request& r, |
| source?source:0, | source?source:0, |
| "%s", comment?comment:""); | "%s", comment?comment:""); |
| } else | } else |
| throw Exception("parser.runtime", | throw Exception(PARSER_RUNTIME, |
| 0, | 0, |
| "one-param version has hash param"); | "one-param version has hash or string param"); |
| } else { | } else { |
| const char* type=params.as_string(0, "type must be string").cstr(); | const char* type=params.as_string(0, "type must be string").cstr(); |
| const String& source=params.as_string(1, "source must be string"); | const String* source=params.count()>1? ¶ms.as_string(1, "source must be string"):0; |
| const char* comment=params.count()>2? params.as_string(2, "comment must be string").cstr() | const char* comment=params.count()>2? params.as_string(2, "comment must be string").cstr():0; |
| :0; | throw Exception(type, source, "%s", comment?comment:""); |
| throw Exception(type, &source, "%s", comment?comment:""); | } |
| } | } |
| } | |
| static void _sleep_operator(Request& r, MethodParams& params) { | |
| double seconds=params.as_double(0, "seconds must be double", r); | |
| pa_sleep((int)trunc(seconds), (int)trunc(seconds*1000)); | |
| } | |
| #if defined(WIN32) && defined(_DEBUG) | #if defined(WIN32) && defined(_DEBUG) |
| # define PA_BPT | # define PA_BPT |
| static void _bpt(Request& r, MethodParams& params) { | static void _bpt(Request&, MethodParams&) { |
| _asm int 3; | _asm int 3; |
| } | } |
| #endif | #endif |
| Line 666 VClassMAIN::VClassMAIN(): VClass() { | Line 866 VClassMAIN::VClassMAIN(): VClass() { |
| add_native_method("taint", Method::CT_ANY, _taint, 1, 2); | add_native_method("taint", Method::CT_ANY, _taint, 1, 2); |
| // ^process[code] | // ^process[code] |
| add_native_method("process", Method::CT_ANY, _process, 1, 2); | add_native_method("process", Method::CT_ANY, _process, 1, 3); |
| // ^rem{code} | // ^rem{code} |
| add_native_method("rem", Method::CT_ANY, _rem, 1, 10000); | add_native_method("rem", Method::CT_ANY, _rem, 1, 10000); |
| // ^while(condition){code} | // ^while(condition){code} |
| add_native_method("while", Method::CT_ANY, _while, 2, 2); | add_native_method("while", Method::CT_ANY, _while, 2, 3); |
| // ^use[file] | // ^use[file] |
| add_native_method("use", Method::CT_ANY, _use, 1, 1); | add_native_method("use", Method::CT_ANY, _use, 1, 1); |
| // ^break[] | |
| add_native_method("break", Method::CT_ANY, _break, 0, 0); | |
| // ^continue[] | |
| add_native_method("continue", Method::CT_ANY, _continue, 0, 0); | |
| // ^for[i](from-number;to-number-inclusive){code}[delim] | // ^for[i](from-number;to-number-inclusive){code}[delim] |
| add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1); | add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1); |
| Line 688 VClassMAIN::VClassMAIN(): VClass() { | Line 892 VClassMAIN::VClassMAIN(): VClass() { |
| add_native_method("connect", Method::CT_ANY, _connect, 2, 2); | 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] delete cache |
| // ^cache[file_spec](time){code} time=0 no cache | // ^cache[] get current expiration time |
| add_native_method("cache", Method::CT_ANY, _cache, 1, 3); | add_native_method("cache", Method::CT_ANY, _cache, 0, 4); |
| // switch | // switch |
| Line 703 VClassMAIN::VClassMAIN(): VClass() { | Line 908 VClassMAIN::VClassMAIN(): VClass() { |
| // try-catch | // try-catch |
| // ^try{code}{catch code} | // ^try{code}{catch code} |
| add_native_method("try", Method::CT_ANY, _try_operator, 2, 2); | add_native_method("try", Method::CT_ANY, _try_operator, 2, 3); |
| // ^throw[$exception hash] | // ^throw[$exception hash] |
| // ^throw[type;source;comment] | // ^throw[type;source;comment] |
| add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3); | add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3); |
| add_native_method("sleep", Method::CT_ANY, _sleep_operator, 1, 1); | |
| } | } |
| // constructor & configurator | // constructor & configurator |