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| version 1.84, 2002/04/15 10:36:43 | version 1.148, 2004/05/26 08:22:16 |
|---|---|
| Line 1 | Line 1 |
| /** @file | /** @file |
| Parser: parser @b operators. | Parser: parser @b operators. |
| Copyright (c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com) | Copyright (c) 2001-2004 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) |
| $Id$ | |
| */ | */ |
| static const char * const IDENT_OP_C="$Date$"; | |
| #include "classes.h" | #include "classes.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_vclass.h" | |
| #include "pa_charset.h" | |
| // limits | // limits |
| Line 20 | Line 26 |
| // defines | // defines |
| #define OP_CLASS_NAME "OP" | |
| #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 |
| class MOP : public Methoded { | class VClassMAIN: public VClass { |
| public: | public: |
| MOP(Pool& pool); | VClassMAIN(); |
| public: // Methoded | |
| bool used_directly() { return true; } | |
| void configure_user(Request& r); | |
| private: | |
| String main_sql_name; | |
| String main_sql_drivers_name; | |
| }; | }; |
| // 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<const String::Body, String::Language> { | |
| 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("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 | // methods |
| static void _if(Request& r, const String&, MethodParams *params) { | static void _if(Request& r, MethodParams& params) { |
| Value& condition_code=params->as_junction(0, "condition must be expression"); | Value& condition_code=params.as_junction(0, "condition must be expression"); |
| bool condition=r.process_to_value(condition_code, | bool condition=r.process_to_value(condition_code, |
| /*0/*no name* /,*/ | |
| false/*don't intercept string*/).as_bool(); | false/*don't intercept string*/).as_bool(); |
| if(condition) | if(condition) |
| r.write_pass_lang(r.process_to_value(params->as_junction(1, "'then' parameter must be code"))); | r.write_pass_lang(r.process(params.as_junction(1, "'then' parameter must be code"))); |
| else if(params->size()>2) | else if(params.count()>2) |
| r.write_pass_lang(r.process_to_value(params->as_junction(2, "'else' parameter must be code"))); | 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) { | static void _untaint(Request& r, MethodParams& params) { |
| Pool& pool=r.pool(); | |
| uchar lang; | String::Language lang; |
| if(params->size()==1) | if(params.count()==1) |
| lang=String::UL_AS_IS; // mark as simply 'tainted'. useful in html from sql | lang=String::L_AS_IS; // mark as simply 'tainted'. useful in html from sql |
| else { | else { |
| const String& lang_name=params->as_string(0, "lang must be string"); | const String& lang_name=params.as_string(0, "lang must be string"); |
| lang=untaint_lang_name2enum->get_int(lang_name); | lang=untaint_lang_name2enum.get(lang_name); |
| if(!lang) | if(!lang) |
| throw Exception(0, | throw Exception(0, |
| &lang_name, | &lang_name, |
| Line 67 static void _untaint(Request& r, const S | Line 108 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; | Temp_lang temp_lang(r, lang); // set temporarily specified ^untaint[language; |
| r.write_pass_lang(r.process_to_value(vbody)); // process marking tainted with that lang | r.write_pass_lang(r.process(vbody)); // process marking tainted with that lang |
| } | } |
| } | } |
| static void _taint(Request& r, const String&, MethodParams *params) { | static void _taint(Request& r, MethodParams& params) { |
| Pool& pool=r.pool(); | String::Language lang; |
| if(params.count()==1) | |
| uchar lang; | lang=String::L_TAINTED; // mark as simply 'tainted'. useful in table:set |
| if(params->size()==1) | |
| lang=String::UL_TAINTED; // mark as simply 'tainted'. useful in table:set | |
| else { | else { |
| const String& lang_name=params->as_string(0, "lang must be string"); | const String& lang_name=params.as_string(0, "lang must be string"); |
| lang=untaint_lang_name2enum->get_int(lang_name); | lang=untaint_lang_name2enum.get(lang_name); |
| if(!lang) | if(!lang) |
| throw Exception(0, | throw Exception(0, |
| &lang_name, | &lang_name, |
| Line 90 static void _taint(Request& r, const Str | Line 129 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( | result.append( |
| vbody.as_string(), // process marking tainted with that lang | vbody.as_string(), // process marking tainted with that lang |
| lang, true); // force result language to specified | lang, true); // force result language to specified |
| Line 100 static void _taint(Request& r, const Str | Line 139 static void _taint(Request& r, const Str |
| } | } |
| } | } |
| static void _process(Request& r, const String& method_name, MethodParams *params) { | static void _process(Request& r, MethodParams& params) { |
| // calculate pseudo file name of processed chars | Method* main_method; |
| // would be something like "/some/file(4) process" | |
| char place[MAX_STRING]; | size_t index=0; |
| #ifndef NO_STRING_ORIGIN | Value* target_self; |
| const Origin& origin=method_name.origin(); | Value& maybe_target_self=params[index]; |
| snprintf(place, MAX_STRING, "%s(%d) %s", | if(maybe_target_self.get_string() || maybe_target_self.get_junction()) |
| origin.file, 1+origin.line, | target_self=&r.get_method_frame()->caller()->self(); |
| method_name.cstr()); | else { |
| #else | target_self=&maybe_target_self; index++; |
| strncpy(place, method_name.cstr(), MAX_STRING-1); place[MAX_STRING-1]=0; | } |
| #endif | |
| 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 | // 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 | // 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 | // 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); | Temp_method temp_method_auto(*target_class, auto_method_name, 0); |
| size_t options_index=index+1; | |
| HashStringValue* options=0; | |
| if(options_index<params.count()) { | |
| 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"); | |
| } | |
| const String* main_alias=0; | |
| const String* file_alias=0; | |
| int line_no_alias_offset=0; | |
| if(options) { | |
| int valid_options=0; | |
| if(Value* vmain_alias=options->get(PROCESS_MAIN_OPTION_NAME)) { | |
| valid_options++; | |
| main_alias=&vmain_alias->as_string(); | |
| } | |
| 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 | // evaluate source to process |
| const String& source= | const String& source=r.process_to_string(vjunction); |
| r.process_to_string(params->as_junction(0, "body must be code")); | r.use_buf(*target_class, |
| source.cstr(String::L_UNSPECIFIED, r.connection(false)), | |
| main_alias, | |
| processe_file_no, | |
| line_no_alias_offset); | |
| // 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); | |
| // main_method | // main_method |
| main_method=self_class.get_method(*main_method_name); | main_method=target_class->get_method(main_method_name); |
| } | } |
| // after restoring current-request-lang | // after restoring current-request-lang |
| // maybe-execute @main[] | // maybe-execute @main[] |
| if(main_method) { | if(main_method) { |
| // temporarily set method_frame's self to target_self | |
| Temp_method_frame_self tmfs(*r.get_method_frame(), *target_self); | |
| // execute! | // execute! |
| r.execute(*main_method->parser_code); | r.execute(*main_method->parser_code); |
| } | } |
| } | } |
| static void _rem(Request& r, const String&, 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, const String& method_name, MethodParams *params) { | static void _while(Request& r, 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"); | |
| Value& vcondition=params->as_junction(0, "condition must be expression"); | |
| Value& body=params->as_junction(1, "body must be code"); | |
| // while... | // while... |
| int endless_loop_count=0; | int endless_loop_count=0; |
| 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", |
| &method_name, | 0, |
| "endless loop detected"); | "endless loop detected"); |
| bool condition= | bool condition=r.process_to_value(vcondition, |
| 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 | // write processed body |
| r.write_pass_lang(r.process_to_value(body)); | r.write_pass_lang(r.process(body)); |
| } | } |
| } | } |
| static void _use(Request& r, const String& method_name, 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(vfile.as_string()); | r.use_file(r.main_class, vfile.as_string()); |
| } | } |
| static void _for(Request& r, const String& method_name, MethodParams *params) { | static void _for(Request& r, MethodParams& params) { |
| Pool& pool=r.pool(); | 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); | Value& body_code=params.as_junction(3, "body must be code"); |
| Value& body_code=params->as_junction(3, "body must be code"); | Value* delim_maybe_code=params.count()>4?¶ms[4]:0; |
| Value *delim_maybe_code=params->size()>4?¶ms->get(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", |
| &method_name, | 0, |
| "endless loop detected"); | "endless loop detected"); |
| bool need_delim=false; | 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++) { | for(int i=from; i<=to; i++) { |
| vint->set_int(i); | vint->set_int(i); |
| r.root->put_element(var_name, vint); | |
| Value& processed_body=r.process_to_value(body_code); | StringOrValue sv_processed=r.process(body_code); |
| if(delim_maybe_code) { // delimiter set? | const String* s_processed=sv_processed.get_string(); |
| const String *string=processed_body.get_string(); | if(delim_maybe_code && s_processed && s_processed->length()) { // delimiter set and we have body |
| if(need_delim && string && string->size()) // need delim & iteration produced string? | if(need_delim) // need delim & iteration produced string? |
| r.write_pass_lang(r.process_to_string(*delim_maybe_code)); | r.write_pass_lang(r.process(*delim_maybe_code)); |
| need_delim=true; | 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) { | static void _eval(Request& r, MethodParams& params) { |
| Value& expr=params->as_junction(0, "need expression"); | Value& expr=params.as_junction(0, "need expression"); |
| // evaluate expresion | // evaluate expresion |
| Value *result=r.process_to_value(expr, | Value& value_result=r.process_to_value(expr, |
| /*0/*no name YET* /,*/ | |
| true/*don't intercept string*/).as_expr_result(); | true/*don't intercept string*/).as_expr_result(); |
| if(params->size()>1) { | if(params.count()>1) { |
| Value& fmt=params->as_no_junction(1, "fmt must not be code"); | 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()))); | |
| Pool& pool=r.pool(); | } else |
| String& string=*new(pool) String(pool); | r.write_no_lang(value_result); |
| 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); | |
| } | } |
| static void _connect(Request& r, const String& method_name, MethodParams *params) { | static void _connect(Request& r, MethodParams& params) { |
| Pool& pool=r.pool(); | |
| #ifdef RESOURCES_DEBUG | #ifdef RESOURCES_DEBUG |
| struct timeval mt[2]; | struct timeval mt[2]; |
| #endif | #endif |
| Value& url=params->as_no_junction(0, "url must not 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"); | Value& body_code=params.as_junction(1, "body must be code"); |
| Table *protocol2driver_and_client= | Table* protocol2driver_and_client=0; |
| static_cast<Table *>(r.classes_conf.get(r.OP.name())); | 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 | #ifdef RESOURCES_DEBUG |
| //measure:before | //measure:before |
| gettimeofday(&mt[0],NULL); | gettimeofday(&mt[0],NULL); |
| #endif | #endif |
| // connect | // connect |
| SQL_Connection_ptr connection=SQL_driver_manager->get_connection( | SQL_Connection* connection=SQL_driver_manager->get_connection(url.as_string(), |
| url.as_string(), method_name, protocol2driver_and_client); | protocol2driver_and_client, |
| r.charsets.source().NAME().cstr()); | |
| #ifdef RESOURCES_DEBUG | #ifdef RESOURCES_DEBUG |
| //measure:after connect | //measure:after connect |
| Line 258 for(int i=0;i<2;i++) | Line 331 for(int i=0;i<2;i++) |
| r.sql_connect_time+=t[1]-t[0]; | r.sql_connect_time+=t[1]-t[0]; |
| #endif | #endif |
| Temp_connection temp_connection(r, connection.get()); | Temp_connection temp_connection(r, connection); |
| // execute body | // execute body |
| try { | try { |
| r.write_assign_lang(r.process_to_value(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(); |
| /*re*/throw; | connection->close(); |
| rethrow; | |
| } | } |
| } | } |
| #ifndef DOXYGEN | #ifndef DOXYGEN |
| struct Switch_data { | class Switch_data: public PA_Object { |
| Request *r; | public: |
| Value *searching; | Request& r; |
| Value *found; | Value& searching; |
| Value *_default; | Value* found; |
| Value* _default; | |
| public: | |
| Switch_data(Request& ar, Value& asearching): | |
| r(ar), searching(asearching) {} | |
| }; | }; |
| #endif | #endif |
| static void _switch(Request& r, const String&, MethodParams *params) { | static void _switch(Request& r, MethodParams& params) { |
| Switch_data data={&r, &r.process_to_value(params->get(0))}; | 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); | Temp_hash_value<const String::Body, void*> |
| 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<<} | r.write_pass_lang(r.process(*selected_code)); |
| selected_code->get_junction()->change_context(cases_code.get_junction()); | |
| r.write_pass_lang(r.process_to_value(*selected_code)); | |
| } | |
| } | } |
| static void _case(Request& r, const String& method_name, MethodParams *params) { | static void _case(Request& r, MethodParams& params) { |
| Pool& pool=r.pool(); | 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", |
| &method_name, | 0, |
| "without switch"); | "without switch"); |
| int count=params->size(); | int count=params.count(); |
| Value *code=¶ms->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<<} | |
| // reason: context is stacked, and it would become invalid afterwards | |
| code->get_junction()->change_context(0); | |
| for(int i=0; i<count; i++) { | for(int i=0; i<count; i++) { |
| Value& value=r.process_to_value(params->get(i)); | Value& value=r.process_to_value(params[i]); |
| if(value.as_string() == CASE_DEFAULT_VALUE) { | if(value.as_string() == CASE_DEFAULT_VALUE) { |
| data->_default=code; | data->_default=&code; |
| break; | break; |
| } | } |
| bool matches; | bool matches; |
| if(data->searching->is_string()) | if(data->searching.is_string()) |
| matches=data->searching->as_string() == value.as_string(); | matches=data->searching.as_string() == value.as_string(); |
| else | else |
| matches=data->searching->as_double() == value.as_double(); | matches=data->searching.as_double() == value.as_double(); |
| if(matches) { | if(matches) { |
| if(data->found) | if(data->found) |
| throw Exception("parser.runtime", | throw Exception("parser.runtime", |
| &method_name, | 0, |
| "duplicate found"); | "duplicate found"); |
| 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) | |
| { | |
| 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-- | // cache-- |
| // consts | // consts |
| const int DATA_STRING_SERIALIZED_VERSION=0x0002; | const int DATA_STRING_SERIALIZED_VERSION=0x0005; |
| // helper types | // helper types |
| Line 353 void cache_delete(const String& file_spe | Line 482 void cache_delete(const String& file_spe |
| } | } |
| #ifndef DOXYGEN | #ifndef DOXYGEN |
| struct Cache_data { | struct Cache_scope { |
| 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), 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) { | static void locked_process_and_cache_put_action(int f, void *context) { |
| 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); |
| // 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); | |
| 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? | // 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 |
| void *data; size_t data_size; | String::Cm serialized=info.processed_code->serialize( |
| info.evaluated_body->serialize( | sizeof(Data_string_serialized_prolog)); |
| sizeof(Data_string_serialized_prolog), | |
| data, data_size); | |
| Data_string_serialized_prolog& prolog= | Data_string_serialized_prolog& prolog= |
| *static_cast<Data_string_serialized_prolog *>(data); | *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, data, data_size); | 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={ | const String& file_spec) |
| &r, | { |
| &data, | Locked_process_and_cache_put_action_info info={&r, &scope, &body_code, catch_code, 0}; |
| &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*/) ? info.evaluated_body: 0; | false/*block*/, |
| if(data.expires==0) | false/*fail on lock problem*/) ? info.processed_code: 0; |
| time_t now=time(0); | |
| if(scope.expires<=now) | |
| cache_delete(file_spec); | cache_delete(file_spec); |
| return result; | return result; |
| } | } |
| String *cache_get(Pool& pool, const String& file_spec, time_t now) { | #ifndef DOXYGEN |
| void* data; size_t data_size; | struct Cache_get_result { |
| if(file_read(pool, file_spec, | const String* body; |
| data, data_size, | 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, | |
| false/*as_text*/, | false/*as_text*/, |
| false/*fail_on_read_problem*/) | 0, //no params |
| && data_size/* ignore reads which are empty due to | false/*fail_on_read_problem*/); |
| if(file.success && file.length/* ignore reads which are empty due to | |
| non-unary open+lockEX conflict with lockSH */) { | non-unary open+lockEX conflict with lockSH */) { |
| Data_string_serialized_prolog& prolog= | Data_string_serialized_prolog& prolog= |
| *static_cast<Data_string_serialized_prolog *>(data); | *reinterpret_cast<Data_string_serialized_prolog *>(file.str); |
| String *result=new(pool) String(pool); | String* body=new String; |
| if( | if( |
| data_size>=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( | result.body=body; |
| sizeof(Data_string_serialized_prolog), data, data_size, file_spec.cstr())) | result.expired=prolog.expires <= now; |
| return result; | } |
| } | |
| } | } |
| return 0; | return result; |
| } | } |
| static time_t as_expires(Request& r, const String& method_name, MethodParams *params, | static time_t as_expires(Request& r, MethodParams& params, |
| int index, time_t now) { | int index, time_t now) { |
| time_t result; | time_t result; |
| Value& vlifespan_or_expires=params->get(index); | if(Value* vdate=params[index].as(VDATE_TYPE, false)) |
| if(strcmp(vlifespan_or_expires.type(), VDATE_TYPE)==0) | result=static_cast<VDate*>(vdate)->get_time(); |
| result=static_cast<VDate&>(vlifespan_or_expires).get_time(); | |
| else | else |
| result=now+(time_t)params->as_double(index, "lifespan must be date or number", r); | result=now+(time_t)params.as_double(index, "lifespan must be date or number", r); |
| return result; | return result; |
| } | } |
| static const String as_file_spec(Request&r, MethodParams *params, int index) { | static const String& as_file_spec(Request& r, MethodParams& params, int index) { |
| 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, const String& method_name, MethodParams *params) { | static void _cache(Request& r, MethodParams& params) { |
| Pool& pool=r.pool(); | |
| time_t now=time(0); | time_t now=time(0); |
| // ^cache[filename] ^cache(seconds) ^cache[expires date] | // ^cache[filename] ^cache(seconds) ^cache[expires date] |
| if(params->size()==1) { | if(params.count()==1) { |
| if(params->get(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", |
| &method_name, | 0, |
| "expire-time reducing instruction without cache"); | "expire-time reducing instruction without cache"); |
| time_t expires=as_expires(r, method_name, 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; |
| } | } |
| // 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=r.absolute(params.as_string(0, "filespec must be string")); |
| Cache_data data; | Cache_scope scope={as_expires(r, params, 1, now), 0}; |
| Temp_hash_value cache_data_setter(r.classes_conf, *cache_data_name, &data); | |
| data.expires=as_expires(r, method_name, params, 1, now); | |
| Value& body_code=params->as_junction(2, "body must be code"); | |
| if(data.expires>now) { // valid 'expires' specified? try cached copy... | Temp_hash_value<const String::Body, void*> |
| 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 | // hence we don't hope to have unary create/lockEX |
| // we need some plan to live in a life like that, so... | // we need some plan to live in a life like that, so... |
| // worst races plan: | // worst races plan: |
| Line 495 static void _cache(Request& r, const Str | Line 664 static void _cache(Request& r, const Str |
| // |lockSH succeeds; ... | // |lockSH succeeds; ... |
| for(int retry=0; retry<2; retry++) { | for(int retry=0; retry<2; retry++) { |
| if(String *cached_body=cache_get(pool, file_spec, now)) { // have cached copy? | Cache_get_result cached=cache_get(r.charsets, file_spec, now); |
| // write it out | if(cached.body) { // have cached copy |
| r.write_assign_lang(*cached_body); | if(cached.expired) |
| // happy with it | scope.body_from_disk=cached.body; // storing for user to retrive it with ^cache[] |
| return; | 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 | // non-blocked lock; process; cache it |
| if(const String*processed_body= | if(const String* processed_body= |
| locked_process_and_cache_put(r, body_code, data, file_spec)) { | locked_process_and_cache_put(r, body_code, catch_code, scope, file_spec)) { |
| // write it out | // write it out |
| r.write_assign_lang(*processed_body); | r.write_assign_lang(*processed_body); |
| // happy with it | // happy with it |
| return; | return; |
| } else { // somebody writing result right now | } else { // somebody writing result right now |
| pa_sleep(0, 500000); // waiting half a second | pa_sleep(0, 500000); // waiting half a second |
| retry=0; // prolonging our wait, than could cache_get it, without processing body_code | retry=0; // prolonging our wait, than could cache_get it, without processing body_code |
| } | } |
| } | } |
| throw Exception(0, | throw Exception(0, |
| &file_spec, | &file_spec, |
| Line 530 static void _cache(Request& r, const Str | Line 705 static void _cache(Request& r, const Str |
| // never reached | // never reached |
| } | } |
| // also used in pa_request.C to pass param to @unhandled_exception | static StringOrValue process_try_body_code(Request& r, Value* body_code) { |
| VHash& exception2vhash(Pool& pool, const Exception& e) { | return r.process(*body_code); |
| 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 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) { | // write out processed body_code or catch_code |
| Pool& pool=r.pool(); | r.write_pass_lang(result.processed_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 *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_to_value(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); | |
| Junction *junction=catch_code.get_junction(); | static void _throw_operator(Request&, MethodParams& params) { |
| Value *saved_exception_var_value=junction->root->get_element(*exception_var_name); | if(params.count()==1) { |
| junction->root->put_element(*exception_var_name, &vhash); | if(HashStringValue *hash=params[0].get_hash()) { |
| result=&r.process_to_value(catch_code); | const char* type=0; |
| bool handled=false; | if(Value* value=hash->get(exception_type_part_name)) |
| if(Value *value=static_cast<Value *>(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<Value *>(hash->get(*exception_type_part_name))) | |
| type=value->as_string().cstr(); | type=value->as_string().cstr(); |
| const String *source=0; | const String* source=0; |
| if(Value *value=static_cast<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=0; | const char* comment=0; |
| if(Value *value= | if(Value* value=hash->get(exception_comment_part_name)) |
| static_cast<Value *>(hash->get(*exception_comment_part_name))) | |
| comment=value->as_string().cstr(); | comment=value->as_string().cstr(); |
| throw Exception(type, | throw Exception(type, |
| source?source:&method_name, | source?source:0, |
| comment); | "%s", comment?comment:""); |
| } else | } else |
| throw Exception("parser.runtime", | throw Exception("parser.runtime", |
| &method_name, | 0, |
| "one-param version has hash param"); | "one-param version has hash 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.as_string(1, "source must be string"); |
| const char *comment=params->as_string(2, "comment must be string").cstr(); | const char* comment=params.count()>2? params.as_string(2, "comment must be string").cstr() |
| throw Exception(type, &source, comment); | :0; |
| } | throw Exception(type, &source, "%s", comment?comment:""); |
| } | |
| } | |
| #if defined(WIN32) && defined(_DEBUG) | |
| # define PA_BPT | |
| static void _bpt(Request&, MethodParams&) { | |
| _asm int 3; | |
| } | } |
| #endif | |
| // constructor | // constructor |
| MOP::MOP(Pool& apool) : Methoded(apool), | VClassMAIN::VClassMAIN(): VClass() { |
| main_sql_name(apool, MAIN_SQL_NAME), | set_name(*new String(MAIN_CLASS_NAME)); |
| main_sql_drivers_name(apool, MAIN_SQL_DRIVERS_NAME) | |
| { | #ifdef PA_BPT |
| set_name(*NEW String(pool(), OP_CLASS_NAME)); | // ^bpt[] |
| add_native_method("bpt", Method::CT_ANY, _bpt, 0, 0); | |
| #endif | |
| // ^if(condition){code-when-true} | // ^if(condition){code-when-true} |
| // ^if(condition){code-when-true}{code-when-false} | // ^if(condition){code-when-true}{code-when-false} |
| Line 654 MOP::MOP(Pool& apool) : Methoded(apool), | Line 782 MOP::MOP(Pool& apool) : Methoded(apool), |
| 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, 1); | 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); |
| Line 676 MOP::MOP(Pool& apool) : Methoded(apool), | Line 804 MOP::MOP(Pool& apool) : Methoded(apool), |
| 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 | add_native_method("cache", Method::CT_ANY, _cache, 1, 4); |
| add_native_method("cache", Method::CT_ANY, _cache, 1, 3); | |
| // switch | // switch |
| Line 700 MOP::MOP(Pool& apool) : Methoded(apool), | Line 828 MOP::MOP(Pool& apool) : Methoded(apool), |
| // constructor & configurator | // constructor & configurator |
| Methoded *MOP_create(Pool& pool) { | VStateless_class& VClassMAIN_create() { |
| return new(pool) MOP(pool); | return *new VClassMAIN; |
| } | |
| 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); | |
| } | } |