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| version 1.35, 2001/07/26 16:16:57 | version 1.127.2.22.2.3, 2003/03/19 13:16:55 |
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| Line 1 | Line 1 |
| /** @file | /** @file |
| Parser: parser @b operators. | Parser: parser @b operators. |
| Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com) | Copyright (c) 2001-2003 ArtLebedev Group (http://www.artlebedev.com) |
| Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru) | |
| Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf) | |
| */ | */ |
| static const char *RCSId="$Id$"; | |
| static const char* IDENT_OP_C="$Date$"; | |
| #include "classes.h" | #include "classes.h" |
| #include "pa_config_includes.h" | #include "pa_vmethod_frame.h" |
| #include "pa_common.h" | #include "pa_common.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_vmethod_frame.h" | |
| #include "pa_vclass.h" | |
| // limits | // limits |
| Line 20 static const char *RCSId="$Id$"; | Line 24 static const char *RCSId="$Id$"; |
| // defines | // defines |
| #define OP_CLASS_NAME "OP" | #define CASE_DEFAULT_VALUE "DEFAULT" |
| // class | |
| class VClassMAIN: public VClass { | |
| public: | |
| VClassMAIN(); | |
| override ~VClassMAIN() {} | |
| }; | |
| #define MAIN_SQL_NAME "SQL" | // defines for statics |
| #define MAIN_SQL_DRIVERS_NAME "drivers" | |
| #define SWITCH_DATA_NAME "SWITCH-DATA" | #define SWITCH_DATA_NAME "SWITCH-DATA" |
| #define DEFAULT_VALUE "DEFAULT" | #define CACHE_DATA_NAME "CACHE-DATA" |
| #define EXCEPTION_VAR_NAME "exception" | |
| #define EXCEPTION_TYPE_PART_NAME "type" | |
| #define EXCEPTION_SOURCE_PART_NAME "source" | |
| #define EXCEPTION_COMMENT_PART_NAME "comment" | |
| #define EXCEPTION_HANDLED_PART_NAME "handled" | |
| // statics | |
| //^switch ^case | |
| static const String& switch_data_name(new String(SWITCH_DATA_NAME)); | |
| //^cache | |
| static const String& cache_data_name(new String(CACHE_DATA_NAME)); | |
| static const String& exception_var_name(new String(EXCEPTION_VAR_NAME)); | |
| static const String& exception_type_part_name(new String(EXCEPTION_TYPE_PART_NAME)); | |
| static const String& exception_source_part_name(new String(EXCEPTION_SOURCE_PART_NAME)); | |
| static const String& exception_comment_part_name(new String(EXCEPTION_COMMENT_PART_NAME)); | |
| static const String& exception_handled_part_name(new String(EXCEPTION_HANDLED_PART_NAME)); | |
| // class | // helpers |
| class MOP : public Methoded { | class Untaint_lang_name2enum: public Hash<String* , int> { |
| public: | public: |
| MOP(Pool& pool); | Untaint_lang_name2enum() { |
| public: // Methoded | #define ULN(name, LANG) \ |
| bool used_directly() { return true; } | put(String* (new String(name)), (value_type)String::UL_##LANG); |
| void configure_user(Request& r); | ULN("as-is", AS_IS); |
| private: | ULN("optimized-as-is", AS_IS|String::UL_OPTIMIZE_BIT); |
| String main_sql_name; | ULN("file-spec", FILE_SPEC); |
| String main_sql_drivers_name; | 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::UL_OPTIMIZE_BIT); | |
| ULN("html", HTML); | |
| ULN("optimized-html", HTML|String::UL_OPTIMIZE_BIT); | |
| #undef ULN | |
| } | |
| } untaint_lang_name2enum; | |
| // methods | // methods |
| static void _if(Request& r, const String&, MethodParams *params) { | static void _if(Request& r, const String& /*method_name*/, MethodParams* params) { |
| Value& condition_code=params->get(0); | ValuePtr condition_code=params->as_junction(0, "condition must be expression"); |
| bool condition=r.process(condition_code, | bool condition=r.process_to_value(condition_code, |
| 0/*no name*/, | /*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(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()==3) | 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->as_junction(2, "'else' parameter must be code"))); |
| } | } |
| static void _untaint(Request& r, const String& method_name, MethodParams *params) { | static void _untaint(Request& r, const String& method_name, MethodParams* params) { |
| Pool& pool=r.pool(); | |
| const String& lang_name=r.process(params->get(0)).as_string(); | String_UL lang; |
| String::Untaint_lang lang=static_cast<String::Untaint_lang>( | if(params->count()==1) |
| untaint_lang_name2enum->get_int(lang_name)); | lang=String::UL_AS_IS; // mark as simply 'tainted'. useful in html from sql |
| if(!lang) | else { |
| PTHROW(0, 0, | const String& lang_name=params->as_string(0, "lang must be string"); |
| &lang_name, | lang=untaint_lang_name2enum.get(lang_name); |
| "invalid untaint language"); | if(!lang) |
| throw Exception(0, | |
| lang_name, | |
| "invalid taint language"); | |
| } | |
| { | { |
| Value& vbody=params->as_junction(1, "body must be code"); | ValuePtr 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(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, const String& /*method_name*/, MethodParams* params) { |
| Pool& pool=r.pool(); | |
| String::Untaint_lang lang; | String_UL lang; |
| if(params->size()==1) | if(params->count()==1) |
| lang=String::UL_TAINTED; // mark as simply 'tainted'. useful in table:set | lang=String::UL_TAINTED; // mark as simply 'tainted'. useful in table:set |
| else { | else { |
| const String& lang_name= | const String& lang_name=params->as_string(0, "lang must be string"); |
| r.process(params->get(0)).as_string(); | lang=untaint_lang_name2enum.get(lang_name); |
| lang=static_cast<String::Untaint_lang>( | |
| untaint_lang_name2enum->get_int(lang_name)); | |
| if(!lang) | if(!lang) |
| PTHROW(0, 0, | throw Exception(0, |
| &lang_name, | lang_name, |
| "invalid taint language"); | "invalid taint language"); |
| } | } |
| { | { |
| Value& vbody=params->as_no_junction(params->size()-1, "body must not be code"); | ValuePtr 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(&pool), // process marking tainted with that lang |
| lang, true); // force result language to specified | lang, true); // force result language to specified |
| r.write_pass_lang(result); | r.write_pass_lang(result); |
| } | } |
| } | } |
| static void _process(Request& r, const String& method_name, MethodParams *params) { | static void _process(Request& r, const String& method_name, MethodParams* params) { |
| // calculate pseudo file name of processed chars | const String* source; // must be declared here to prevent premature destruction |
| // would be something like "/some/file(4) process" | MethodPtr main_method; |
| char place[MAX_STRING]; | ValuePtr target_self=params->count()>1? |
| #ifndef NO_STRING_ORIGIN | params->as_no_junction(0, "target must not be code") |
| const Origin& origin=method_name.origin(); | :ValuePtr(&r.get_method_frame()->caller()->self()); |
| snprintf(place, MAX_STRING, "%s(%d) %s", | |
| origin.file, 1+origin.line, | |
| method_name.cstr()); | |
| #else | |
| strncpy(place, MAX_STRING, method_name.cstr()); | |
| #endif | |
| VStateless_class& self_class=*r.self->get_class(); | |
| { | { |
| ValuePtr vjunction=params->as_junction(params->count()-1, "body must be code"); | |
| VStateless_class *target_class=target_self->get_last_derived_class(); | |
| if(!target_class) | |
| throw Exception("parser.runtime", | |
| method_name, | |
| "no target class"); | |
| // evaluate source to process | |
| source=r.process_to_string(vjunction); | |
| // temporary remove language change | |
| Temp_lang temp_lang(r, String::UL_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, MethodPtr(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, MethodPtr(0)); |
| // evaluate source to process | // calculate pseudo file name of processed chars |
| const String& source= | // would be something like "/some/file(4) process" |
| r.process(params->get(0)).as_string(); | char local_place[MAX_STRING]; |
| #ifndef NO_STRING_ORIGIN | |
| const String_fragment::Origin& source_origin=source->origin(); | |
| const String_fragment::Origin& method_origin=method_name->origin(); | |
| size_t place_size; | |
| if(source_origin.file==method_origin.file) | |
| place_size=snprintf(local_place, MAX_STRING, "%s(%d) %s", // same file | |
| source_origin.file?source_origin.file:"unknown_file", 1+source_origin.line, | |
| method_name->cstr().get())+1; | |
| else // different files ^process{external__file_text__or__sql} | |
| place_size=snprintf(local_place, MAX_STRING, "%s", | |
| source_origin.file?source_origin.file:"unknown_file")+1; | |
| #else | |
| strncpy(local_place, method_name->cstr(), MAX_STRING-1); place[MAX_STRING-1]=0; | |
| size_t place_size=strlen(local_place)+1; | |
| #endif | |
| char *heap_place=pool.copy(local_place, place_size); | |
| // process source code, append processed methods to 'self' class | // process source code, append processed methods to 'self' class |
| // maybe-define new @main | // maybe-define new @main |
| r.use_buf(source.cstr(), place, &self_class); | r.use_buf(*target_class, |
| source->cstr(pool, String::UL_UNSPECIFIED, r.connection(0)), | |
| String* (new String(heap_place, place_size, true /*tainted*/)), | |
| heap_place); | |
| // maybe-execute @main[] | // main_method |
| if(const Method *method=self_class.get_method(*main_method_name)) { | main_method=target_class->get_method(main_method_name); |
| // execute! | } |
| r.execute(*method->parser_code); | // 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) { | static void _rem(Request& r, const String& /*method_name*/, 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, const String& method_name, MethodParams* params) { |
| Pool& pool=r.pool(); | |
| Value& vcondition=params->as_junction(0, "condition must be expression"); | ValuePtr vcondition=params->as_junction(0, "condition must be expression"); |
| Value& body=params->as_junction(1, "body must be code"); | ValuePtr 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? |
| PTHROW(0, 0, | throw Exception("parser.runtime", |
| &method_name, | method_name, |
| "endless loop detected"); | "endless loop detected"); |
| bool condition= | bool condition=r.process_to_value(vcondition, |
| r.process( | /*0/*no name* /,*/ |
| vcondition, | false/*don't intercept string*/)->as_bool(); |
| 0/*no name*/, | |
| false/*don't intercept string*/).as_bool(); | |
| if(!condition) // ...condition is true | if(!condition) // ...condition is true |
| break; | break; |
| Line 169 static void _while(Request& r, const Str | Line 235 static void _while(Request& r, const Str |
| } | } |
| } | } |
| static void _use(Request& r, const String& method_name, MethodParams *params) { | static void _use(Request& r, const String& method_name, MethodParams* params) { |
| Value& vfile=params->as_no_junction(0, "file name must not be code"); | ValuePtr vfile=params->as_no_junction(0, "file name must not be code"); |
| r.use_file(r.absolute(vfile.as_string())); | r.use_file(*r.main_class, vfile->as_string(&pool)); |
| } | } |
| static void _for(Request& r, const String& method_name, MethodParams *params) { | 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"); |
| const String& var_name=r.process(params->get(0)).as_string(); | int from=params->as_int(1, "from must be int", r); |
| int from=r.process(params->get(1)).as_int(); | int to=params->as_int(2, "to must be int", r); |
| int to=r.process(params->get(2)).as_int(); | ValuePtr body_code=params->as_junction(3, "body must be code"); |
| Value& body_code=params->as_junction(3, "body must be code"); | ValuePtr delim_maybe_code=params->count()>4?(*params)[4]:ValuePtr(0); |
| Value *delim_code=params->size()==3+1+1?¶ms->get(3+1):0; | |
| if(to-from>=MAX_LOOPS) // too long loop? | |
| throw Exception("parser.runtime", | |
| method_name, | |
| "endless loop detected"); | |
| bool need_delim=false; | bool need_delim=false; |
| VInt *vint=new(pool) VInt(pool, 0); | VIntPtr vint(new VInt(0)); |
| int endless_loop_count=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++) { |
| if(++endless_loop_count>=MAX_LOOPS) // endless loop? | |
| PTHROW(0, 0, | |
| &method_name, | |
| "endless loop detected"); | |
| vint->set_int(i); | vint->set_int(i); |
| r.root->put_element(var_name, vint); | |
| Value& processed_body=r.process(body_code); | StringOrValue sv_processed=r.process(body_code); |
| if(delim_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->size()) { // 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(*delim_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, const String& method_name, MethodParams* params) { |
| Value& expr=params->as_junction(0, "need expression"); | ValuePtr expr=params->as_junction(0, "need expression"); |
| // evaluate expresion | // evaluate expresion |
| Value *result=r.process(expr, | ValuePtr value_result=r.process_to_value(expr, |
| 0/*no name YET*/, | /*0/*no name YET* /,*/ |
| true/*don't intercept string*/).as_expr_result(); | true/*don't intercept string*/)->as_expr_result(); |
| if(params->size()==2) { | if(params->count()>1) { |
| Value& fmt=params->as_no_junction(1, "fmt must not be code"); | ValuePtr fmt=params->as_no_junction(1, "fmt must not be code"); |
| String string; | |
| Pool& pool=r.pool(); | string.APPEND_CONST( |
| String& string=*new(pool) String(pool); | format(pool, value_result->as_double(), fmt->as_string(&pool)->cstr())); |
| string.APPEND_CONST(format(pool, result->as_double(), fmt.as_string().cstr())); | r.write_no_lang(string); |
| result=new(pool) VString(string); | } else |
| r.write_no_lang(value_result); | |
| } | |
| static void _connect(Request& r, const String& method_name, MethodParams* params) { | |
| #ifdef RESOURCES_DEBUG | |
| struct timeval mt[2]; | |
| #endif | |
| ValuePtr url=params->as_no_junction(0, "url must not be code"); | |
| ValuePtr body_code=params->as_junction(1, "body must be code"); | |
| Table* protocol2driver_and_client=0; | |
| if(ValuePtr sql=r.main_class->get_element(String* (new String(MAIN_SQL_NAME)), *r.main_class, false)) { | |
| if(ValuePtr element=sql->get_element(String* (new String(MAIN_SQL_DRIVERS_NAME)), *sql, false)) { | |
| protocol2driver_and_client=element->get_table(); | |
| } | |
| } | } |
| result->set_name(method_name); | |
| r.write_no_lang(*result); | |
| } | |
| static void _connect(Request& r, const String&, MethodParams *params) { | |
| Pool& pool=r.pool(); | |
| 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<Table *>(r.classes_conf.get(r.OP.name())); | |
| #ifdef RESOURCES_DEBUG | |
| //measure:before | |
| gettimeofday(&mt[0],NULL); | |
| #endif | |
| // connect | // connect |
| SQL_Connection& connection=SQL_driver_manager->get_connection( | SQL_ConnectionPtr connection=SQL_driver_manager.get_connection(pool, |
| url.as_string(), protocol2driver_and_client); | url->as_string(&pool), method_name, protocol2driver_and_client); |
| Exception rethrow_me; | #ifdef RESOURCES_DEBUG |
| // remember/set current connection | //measure:after connect |
| SQL_Connection *saved_connection=r.connection; | gettimeofday(&mt[1],NULL); |
| r.connection=&connection; | |
| double t[2]; | |
| for(int i=0;i<2;i++) | |
| t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0; | |
| r.sql_connect_time+=t[1]-t[0]; | |
| #endif | |
| Temp_connection temp_connection(r, connection.get()); | |
| // execute body | // execute body |
| bool body_failed=false; | try { |
| PTRY | |
| r.write_assign_lang(r.process(body_code)); | r.write_assign_lang(r.process(body_code)); |
| PCATCH(e) { // connect/process problem | } catch(...) { // process problem |
| rethrow_me=e; body_failed=true; | connection->mark_to_rollback(); |
| rethrow; | |
| } | } |
| PEND_CATCH | } |
| bool finalizer_failed=false; | #ifndef DOXYGEN |
| PTRY | class Switch_data: public PA_Object { |
| // FINALLY | public: |
| if(body_failed) | Request& r; |
| connection.rollback(); | ValuePtr searching; |
| else | ValuePtr found; |
| connection.commit(); | ValuePtr _default; |
| PCATCH(e) { // commit/rollback problem | public: |
| rethrow_me=e; finalizer_failed=true; | Switch_data(Request& ar, ValuePtr asearching): |
| } | r(ar), searching(asearching) {} |
| PEND_CATCH | |
| // close connection [cache it] | |
| connection.close(); | |
| // recall current connection from remembered | |
| r.connection=saved_connection; | |
| if(body_failed || finalizer_failed) // were there an exception for us to rethrow? | |
| PTHROW(rethrow_me.type(), rethrow_me.code(), | |
| rethrow_me.problem_source(), | |
| rethrow_me.comment()); | |
| } | |
| static String *switch_data_name; | |
| static String *default_value; | |
| struct Switch_data { | |
| Value *searching; | |
| Value *found; | |
| Value *_default; | |
| }; | }; |
| DECLARE_OBJECT_PTR(Switch_data); | |
| #endif | |
| static void _switch(Request& r, const String& /*method_name*/, MethodParams* params) { | |
| Switch_dataPtr data(new Switch_data(r, r.process_to_value(params->get(0)))); | |
| Temp_hash_value<String* , PA_Object* > | |
| switch_data_setter(r.classes_conf, switch_data_name, data); | |
| ValuePtr 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(ValuePtr 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 _switch(Request& r, const String&, MethodParams *params) { | static void _case(Request& r, const String& method_name, 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) | Switch_data* data=static_cast<Switch_data*>(r.classes_conf.get(switch_data_name).get()); |
| r.write_pass_lang(r.process(*code)); | if(!data) |
| } | throw Exception("parser.runtime", |
| method_name, | |
| "without switch"); | |
| static void _case(Request& r, const String&, MethodParams *params) { | int count=params->count(); |
| Switch_data& data=*static_cast<Switch_data *>(r.classes_conf.get(*switch_data_name)); | ValuePtr 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); | |
| int count=params->size(); | |
| Value *code=¶ms->as_junction(--count, "case result must be code"); | |
| for(int i=0; i<count; i++) { | for(int i=0; i<count; i++) { |
| Value& value=r.process(params->get(i)); | ValuePtr value=r.process_to_value(params->get(i)); |
| if(value.as_string() == *default_value) { | if(*value->as_string(&pool) == 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(&pool) == *value->as_string(&pool); |
| else | else |
| matches=data.searching->as_double() == value.as_double(); | matches=data->searching->as_double() == value->as_double(); |
| if(matches) { | if(matches) { |
| data.found=code; | if(data->found) |
| throw Exception("parser.runtime", | |
| method_name, | |
| "duplicate found"); | |
| data->found=code; | |
| break; | break; |
| } | } |
| } | } |
| } | } |
| // cache-- | |
| // consts | |
| const int DATA_STRING_SERIALIZED_VERSION=0x0004; | |
| // helper types | |
| #ifndef DOXYGEN | |
| struct Data_string_serialized_prolog { | |
| int version; | |
| time_t expires; | |
| }; | |
| #endif | |
| void cache_delete(const String& file_spec) { | |
| file_delete(file_spec, false/*fail_on_read_problem*/); | |
| } | |
| #ifndef DOXYGEN | |
| class Cache_data: public PA_Object { | |
| public: | |
| time_t expires; | |
| }; | |
| DECLARE_OBJECT_PTR(Cache_data); | |
| struct Locked_process_and_cache_put_action_info { | |
| Request *r; | |
| Cache_data *data; | |
| ValuePtr body_code; const String& evaluated_body; | |
| }; | |
| #endif | |
| /* @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<Locked_process_and_cache_put_action_info *>(context); | |
| =info.r->pool(); | |
| // body->process | |
| info.evaluated_body=info.r->process_to_string(info.body_code); | |
| // expiration time not spoiled by ^cache(0) or something? | |
| if(info.data->expires > time(0)) { | |
| // string -serialize> buffer | |
| char *data; size_t data_size; | |
| info.evaluated_body->serialize(pool, | |
| sizeof(Data_string_serialized_prolog), | |
| data, data_size); | |
| Data_string_serialized_prolog& prolog= | |
| *reinterpret_cast<Data_string_serialized_prolog *>(data); | |
| prolog.version=DATA_STRING_SERIALIZED_VERSION; | |
| prolog.expires=info.data->expires; | |
| // buffer -write> file | |
| write(f, data, data_size); | |
| } else // expired! | |
| info.data->expires=0; // flag it so that could be easily checked by caller | |
| } | |
| const String& locked_process_and_cache_put(Request& r, | |
| ValuePtr body_code, | |
| Cache_data& data, | |
| const String& file_spec) { | |
| Locked_process_and_cache_put_action_info info; | |
| info.r=&r; | |
| info.data=&data; | |
| info.body_code=body_code; | |
| 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*/, | |
| false/*fail on lock problem*/) ? info.evaluated_body: 0; | |
| time_t now=time(0); | |
| if(data.expires<=now) | |
| cache_delete(file_spec); | |
| return result; | |
| } | |
| const String& cache_getCharset& charset, const String& file_spec, time_t now) { | |
| File_read_result file=file_read(pool, charset, file_spec, | |
| false/*as_text*/, | |
| 0, //no params | |
| false/*fail_on_read_problem*/); | |
| if(file.success && file.size/* ignore reads which are empty due to | |
| non-unary open+lockEX conflict with lockSH */) { | |
| Data_string_serialized_prolog& prolog= | |
| *reinterpret_cast<Data_string_serialized_prolog *>(file.data); | |
| const String& result(new String); | |
| if( | |
| file.size>=sizeof(Data_string_serialized_prolog) | |
| && prolog.version==DATA_STRING_SERIALIZED_VERSION | |
| && prolog.expires > now | |
| && result->deserialize( | |
| sizeof(Data_string_serialized_prolog), file.data, file.size, file_spec->cstr())) | |
| return result; | |
| } | |
| return 0; | |
| } | |
| static time_t as_expires(Request& r, const String& method_name, MethodParams* params, | |
| int index, time_t now) { | |
| time_t result; | |
| if(Value* vdate=(*params)[index]->as(VDATE_TYPE, false)) | |
| result=static_cast<VDate*>(vdate)->get_time(); | |
| else | |
| result=now+(time_t)params->as_double(index, "lifespan must be date or number", r); | |
| 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, const String& method_name, 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_data* data=static_cast<Cache_data*>(r.classes_conf.get(cache_data_name).get()); | |
| if(!data) | |
| throw Exception("parser.runtime", | |
| method_name, | |
| "expire-time reducing instruction without cache"); | |
| time_t expires=as_expires(r, method_name, params, 0, now); | |
| if(expires < data->expires) | |
| data->expires=expires; | |
| return; | |
| } | |
| // file_spec, expires, body code | |
| const String& file_spec=r.absolute(params->as_string(0, "filespec must be string")); | |
| Cache_dataPtr data(new Cache_data); | |
| Temp_hash_value<String* , PA_Object* > | |
| cache_data_setter(r.classes_conf, cache_data_name, data); | |
| data->expires=as_expires(r, method_name, params, 1, now); | |
| ValuePtr 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(pool, r.charsets.source(), 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 | |
| if(const String& processed_body= | |
| locked_process_and_cache_put(r, body_code, *data, 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 { | |
| // instructed not to cache; forget cached copy | |
| 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 | |
| } | |
| // also used in pa_request.C to pass param to @unhandled_exception | |
| VHashPtr exception2vhashconst Exception& e) { | |
| VHashPtr result(new VHash); | |
| HashStringValue& hash=result->hash(Exception::undefined_source); | |
| if(const char* type=e.type(true)) | |
| hash.put(exception_type_part_name, ValuePtr(new VString(String* (new String(type))))); | |
| if(const String& asource=e.problem_source()) { | |
| const String* source(new String); | |
| source->append(*asource, String::UL_TAINTED, true/*forced*/); | |
| hash.put(exception_source_part_name, ValuePtr(new VString(source))); | |
| #ifndef NO_STRING_ORIGIN | |
| const String_fragment::Origin& origin=source->origin(); | |
| hash.put(String* (new String("file", 0, true)), | |
| ValuePtr(new VString(String* (new String(origin.file))))); | |
| hash.put(String* (new String("lineno")), | |
| ValuePtr(new VInt(1+origin.line))); | |
| #endif | |
| } | |
| if(const char* ecomment=e.comment(true)) { | |
| char *pcomment=pool.copy(ecomment); | |
| hash.put(exception_comment_part_name, | |
| ValuePtr(new VString(String* (new String(pcomment, 0, true/*tainted*/))))); | |
| } | |
| hash.put(exception_handled_part_name, | |
| ValuePtr(new VBool(false))); | |
| return result; | |
| } | |
| static void _try_operator(Request& r, const String& method_name, MethodParams* params) { | |
| ValuePtr body_code=params->as_junction(0, "body_code must be code"); | |
| ValuePtr catch_code=params->as_junction(1, "catch_code must be code"); | |
| StringOrValue result; | |
| // taking snapshot of try-context | |
| Request_context_saver try_context(r); | |
| try { | |
| result=r.process(body_code); | |
| } catch(const Exception& e) { | |
| Request_context_saver throw_context(r); // taking snapshot of throw-context [stack trace contains error] | |
| try_context.restore(); // restoring try-context to perform catch-code | |
| VHashPtr vhash=exception2vhash(pool, e); | |
| JunctionPtr junction=catch_code->get_junction(); | |
| Value* method_frame=junction->method_frame; | |
| ValuePtr saved_exception_var_value=method_frame->get_element(exception_var_name, *method_frame, false); | |
| junction->method_frame->put_element(exception_var_name, vhash, false); | |
| result=r.process(catch_code); | |
| bool handled=false; | |
| if(ValuePtr value= | |
| vhash->hash(Exception::undefined_source).get(exception_handled_part_name)) | |
| handled=value->as_bool(); | |
| junction->method_frame->put_element(exception_var_name, saved_exception_var_value, false); | |
| if(!handled) { | |
| throw_context.restore(); // restoring throw-context [exception were not handled] | |
| throw(e); // rethrow | |
| } | |
| } | |
| // write out result | |
| r.write_pass_lang(result); | |
| } | |
| static void _throw_operator(Request& r, const String& method_name, MethodParams* params) { | |
| if(params->count()==1) { | |
| ValuePtr param0=(*params)[0]; | |
| if(HashStringValue *hash=param0->get_hash(method_name)) { | |
| const char* type=0; | |
| if(ValuePtr value=hash->get(exception_type_part_name)) | |
| type=value->as_string(&pool)->cstr(); | |
| const String* source; | |
| if(ValuePtr value=hash->get(exception_source_part_name)) | |
| source=value->as_string(&pool); | |
| const char* comment; | |
| if(ValuePtr value=hash->get(exception_comment_part_name)) | |
| comment=value->as_string(&pool)->cstr(); | |
| throw Exception(type, | |
| source?source:method_name, | |
| "%s", comment?comment.get():""); | |
| } else | |
| throw Exception("parser.runtime", | |
| method_name, | |
| "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->count()>2? params->as_string(2, "comment must be string")->cstr() | |
| :CharPtr(0); | |
| throw Exception(type, source, "%s", comment?comment.get():""); | |
| } | |
| } | |
| #if defined(WIN32) && defined(_DEBUG) | |
| # define PA_BPT | |
| static void _bpt(Request& r, const String& method_name, MethodParams* params) { | |
| _asm int 3; | |
| } | |
| #endif | |
| // constructor | // constructor |
| MOP::MOP(Pool& apool) : Methoded(apool), | VClassMAIN::VClassMAIN(): VClass() { |
| main_sql_name(apool, MAIN_SQL_NAME), | set_name(String* (new String(MAIN_CLASS_NAME))); |
| main_sql_drivers_name(apool, MAIN_SQL_DRIVERS_NAME) | |
| { | |
| set_name(*NEW String(pool(), OP_CLASS_NAME)); | |
| switch_data_name=NEW String(pool(), SWITCH_DATA_NAME); | #ifdef PA_BPT |
| default_value=NEW String(pool(), DEFAULT_VALUE); | // ^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} |
| add_native_method("if", Method::CT_ANY, _if, 2, 3); | add_native_method("if", Method::CT_ANY, _if, 2, 3); |
| // ^untaint[as-is|uri|sql|js|html|html-typo]{code} | // ^untaint[as-is|uri|sql|js|html|html-typo]{code} |
| add_native_method("untaint", Method::CT_ANY, _untaint, 2, 2); | add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2); |
| // ^taint[as-is|uri|sql|js|html|html-typo]{code} | // ^taint[as-is|uri|sql|js|html|html-typo]{code} |
| 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, 2); |
| // ^rem{code} | // ^rem{code} |
| add_native_method("rem", Method::CT_ANY, _rem, 1, 1000); | 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, 2); |
| Line 353 MOP::MOP(Pool& apool) : Methoded(apool), | Line 737 MOP::MOP(Pool& apool) : Methoded(apool), |
| // ^use[file] | // ^use[file] |
| add_native_method("use", Method::CT_ANY, _use, 1, 1); | add_native_method("use", Method::CT_ANY, _use, 1, 1); |
| // ^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); |
| // ^eval(expr) | // ^eval(expr) |
| // ^eval(expr)[format] | // ^eval(expr)[format] |
| add_native_method("eval", Method::CT_ANY, _eval, 1, 2); | add_native_method("eval", Method::CT_ANY, _eval, 1, 2); |
| // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s} | // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s} |
| add_native_method("connect", Method::CT_ANY, _connect, 2, 2); | add_native_method("connect", Method::CT_ANY, _connect, 2, 2); |
| // ^cache[file_spec] delete cache | |
| // ^cache[file_spec](time){code} time=0 no cache | |
| add_native_method("cache", Method::CT_ANY, _cache, 1, 3); | |
| // switch | // switch |
| // ^switch[value]{cases} | // ^switch[value]{cases} |
| add_native_method("switch", Method::CT_ANY, _switch, 2, 2); | add_native_method("switch", Method::CT_ANY, _switch, 2, 2); |
| // ^case[value]{code} | // ^case[value]{code} |
| add_native_method("case", Method::CT_ANY, _case, 2, 1000); | add_native_method("case", Method::CT_ANY, _case, 2, 10000); |
| } | |
| // constructor & configurator | // try-catch |
| Methoded *MOP_create(Pool& pool) { | // ^try{code}{catch code} |
| return new(pool) MOP(pool); | add_native_method("try", Method::CT_ANY, _try_operator, 2, 2); |
| } | // ^throw[$exception hash] |
| // ^throw[type;source;comment] | |
| add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3); | |
| } | |
| void MOP::configure_user(Request& r) { | // constructor & configurator |
| Pool& pool=r.pool(); | |
| // $MAIN:SQL.drivers | VStateless_classPtr VClassMAIN_create() { |
| if(Value *sql=r.main_class->get_element(main_sql_name)) | |
| if(Value *element=sql->get_element(main_sql_drivers_name)) | return VStateless_classPtr(new VClassMAIN); |
| if(Table *protocol2library=element->get_table()) | |
| r.classes_conf.put(name(), protocol2library); | |
| } | } |