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| version 1.3, 2001/04/11 08:13:38 | version 1.90, 2002/04/17 12:20:14 |
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| Line 1 | Line 1 |
| /** @file | /** @file |
| Parser: @b ROOT parser class. | Parser: parser @b operators. |
| Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com) | Copyright (c) 2001, 2002 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) | |
| $Id$ | $Id$ |
| */ | */ |
| #include "pa_config_includes.h" | #include "classes.h" |
| #include <math.h> | |
| #include "pa_common.h" | #include "pa_common.h" |
| #include "pa_request.h" | #include "pa_request.h" |
| #include "_op.h" | |
| #include "pa_vint.h" | #include "pa_vint.h" |
| #include "pa_sql_connection.h" | #include "pa_sql_connection.h" |
| #include "pa_vdate.h" | |
| // limits | |
| #define MAX_LOOPS 10000 | |
| // defines | |
| #define OP_CLASS_NAME "OP" | |
| #define CASE_DEFAULT_VALUE "DEFAULT" | |
| // class | |
| static void _if(Request& r, const String& method_name, Array *params) { | class MOP : public Methoded { |
| Value& condition_code=*static_cast<Value *>(params->get(0)); | public: |
| // forcing ^if(this param type) | MOP(Pool& pool); |
| r.fail_if_junction_(false, condition_code, | public: // Methoded |
| method_name, "condition must be expression"); | bool used_directly() { return true; } |
| void configure_user(Request& r); | |
| bool condition=r.process(condition_code, | private: |
| 0/*no name*/, | String main_sql_name; |
| String main_sql_drivers_name; | |
| }; | |
| // methods | |
| static void _if(Request& r, const String&, MethodParams *params) { | |
| Value& condition_code=params->as_junction(0, "condition must be expression"); | |
| 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) |
| Value& then_code=*static_cast<Value *>(params->get(1)); | r.write_pass_lang(r.process(params->as_junction(1, "'then' parameter must be code"))); |
| // forcing ^if{this param type} | else if(params->size()>2) |
| r.fail_if_junction_(false, then_code, | r.write_pass_lang(r.process(params->as_junction(2, "'else' parameter must be code"))); |
| method_name, "then-parameter must be code"); | |
| r.write_pass_lang(r.process(then_code)); | |
| } else if(params->size()==3) { | |
| Value& else_code=*static_cast<Value *>(params->get(2)); | |
| // forcing ^if{this param type} | |
| r.fail_if_junction_(false, else_code, | |
| method_name, "else-parameter must be code"); | |
| r.write_pass_lang(r.process(else_code)); | |
| } | |
| } | } |
| static void _untaint(Request& r, const String& method_name, Array *params) { | static void _untaint(Request& r, const String& method_name, MethodParams *params) { |
| Pool& pool=r.pool(); | Pool& pool=r.pool(); |
| const String& lang_name=r.process(*static_cast<Value *>(params->get(0))).as_string(); | uchar lang; |
| String::Untaint_lang lang=static_cast<String::Untaint_lang>( | if(params->size()==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_int(lang_name); |
| "invalid untaint language"); | if(!lang) |
| throw Exception(0, | |
| &lang_name, | |
| "invalid taint language"); | |
| } | |
| { | { |
| Value *vbody=static_cast<Value *>(params->get(1)); | Value& vbody=params->as_junction(params->size()-1, "body must be code"); |
| // forcing ^untaint[]{this param type} | |
| r.fail_if_junction_(false, *vbody, | |
| method_name, "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& method_name, Array *params) { | static void _taint(Request& r, const String&, MethodParams *params) { |
| Pool& pool=r.pool(); | Pool& pool=r.pool(); |
| String::Untaint_lang lang; | uchar lang; |
| if(params->size()==1) | if(params->size()==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(*static_cast<Value *>(params->get(0))).as_string(); | lang=untaint_lang_name2enum->get_int(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=*static_cast<Value *>(params->get(params->size()-1)); | Value& vbody=params->as_no_junction(params->size()-1, "body must not be code"); |
| // forcing [this param type] | |
| r.fail_if_junction_(true, vbody, method_name, "body must not be code"); | |
| String result(r.pool()); | String& result=*new(pool) String(pool); |
| 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 93 static void _taint(Request& r, const Str | Line 100 static void _taint(Request& r, const Str |
| } | } |
| } | } |
| static void _process(Request& r, const String& method_name, Array *params) { | static void _process(Request& r, const String& method_name, MethodParams *params) { |
| // calculate pseudo file name of processed chars | // calculate pseudo file name of processed chars |
| // would be something like "/some/file(4) process" | // would be something like "/some/file(4) process" |
| char place[MAX_STRING]; | char local_place[MAX_STRING]; |
| #ifndef NO_STRING_ORIGIN | #ifndef NO_STRING_ORIGIN |
| const Origin& origin=method_name.origin(); | const Origin& origin=method_name.origin(); |
| snprintf(place, MAX_STRING, "%s(%d) %s", | size_t place_size=snprintf(local_place, MAX_STRING, "%s(%d) %s", |
| origin.file, 1+origin.line, | origin.file?origin.file:"unknown_file", 1+origin.line, |
| method_name.cstr()); | method_name.cstr())+1; |
| #else | #else |
| strncpy(place, MAX_STRING, method_name.cstr()); | strncpy(local_place, method_name.cstr(), MAX_STRING-1); place[MAX_STRING-1]=0; |
| #endif | size_t place_size=strlen(local_place)+1; |
| #endif | |
| char *heap_place=(char *)r.malloc(place_size); | |
| memcpy(heap_place, local_place, place_size); | |
| VStateless_class& self_class=*r.self->get_class(); | VStateless_class& self_class=*r.self->get_class(); |
| const Method *main_method; | |
| { | { |
| // 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(self_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(self_class, *auto_method_name, 0); |
| // evaluate source to process | // evaluate source to process |
| const String& source= | const String& source=r.process_to_string(params->as_junction(0, "body must be code")); |
| r.process(*static_cast<Value *>(params->get(0))).as_string(); | |
| // 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( |
| source.cstr(String::UL_UNSPECIFIED, r.connection(0)), | |
| heap_place, | |
| &self_class); | |
| // maybe-execute @main[] | // main_method |
| if(const Method *method=self_class.get_method(*main_method_name)) { | main_method=self_class.get_method(*main_method_name); |
| // execute! | } |
| r.execute(*method->parser_code); | // after restoring current-request-lang |
| } | // maybe-execute @main[] |
| if(main_method) { | |
| // execute! | |
| r.execute(*main_method->parser_code); | |
| } | } |
| } | } |
| static void _rem(Request& r, const String& method_name, Array *params) { | static void _rem(Request& r, const String&, MethodParams *params) { |
| // forcing ^rem{this param type} | params->as_junction(0, "body must be code"); |
| r.fail_if_junction_(false, *static_cast<Value *>(params->get(0)), | |
| method_name, "body must be code"); | |
| } | } |
| static void _while(Request& r, const String& method_name, Array *params) { | static void _while(Request& r, const String& method_name, MethodParams *params) { |
| Pool& pool=r.pool(); | Pool& pool=r.pool(); |
| Value& vcondition=*static_cast<Value *>(params->get(0)); | Value& vcondition=params->as_junction(0, "condition must be expression"); |
| // forcing ^while(this param type){} | Value& body=params->as_junction(1, "body must be code"); |
| r.fail_if_junction_(false, vcondition, | |
| method_name, "condition must be expression"); | |
| Value& body=*static_cast<Value *>(params->get(1)); | |
| // forcing ^while(){this param type} | |
| r.fail_if_junction_(false, body, | |
| method_name, "body must be code"); | |
| // while... | // while... |
| int endless_loop_count=0; | int endless_loop_count=0; |
| while(true) { | while(true) { |
| if(++endless_loop_count>=1973) // 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, | |
| 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; |
| Line 169 static void _while(Request& r, const Str | Line 177 static void _while(Request& r, const Str |
| } | } |
| } | } |
| static void _use(Request& r, const String& method_name, Array *params) { | static void _use(Request& r, const String& method_name, MethodParams *params) { |
| Value& vfile=*static_cast<Value *>(params->get(0)); | Value& vfile=params->as_no_junction(0, "file name must not be code"); |
| // forcing ^rem{this param type} | r.use_file(vfile.as_string()); |
| r.fail_if_junction_(true, vfile, | |
| method_name, "file name must not be code"); | |
| r.use_file(r.absolute(vfile.as_string())); | |
| } | } |
| static void _for(Request& r, const String& method_name, Array *params) { | static void _for(Request& r, const String& method_name, MethodParams *params) { |
| // ^for[i;from-number;to-number-inclusive]{code}[delim] | |
| Pool& pool=r.pool(); | Pool& pool=r.pool(); |
| const String& var_name=r.process(*static_cast<Value *>(params->get(0))).as_string(); | const String& var_name=params->as_string(0, "var name must be string"); |
| int from=(int)r.process(*static_cast<Value *>(params->get(1))).as_double(); | int from=params->as_int(1, "from must be int", r); |
| int to=(int)r.process(*static_cast<Value *>(params->get(2))).as_double(); | int to=params->as_int(2, "to must be int", r); |
| Value& body_code=*static_cast<Value *>(params->get(3)); | Value& body_code=params->as_junction(3, "body must be code"); |
| // forcing ^menu{this param type} | Value *delim_maybe_code=params->size()>4?¶ms->get(4):0; |
| r.fail_if_junction_(false, body_code, | |
| method_name, "body must be code"); | if(to-from>=MAX_LOOPS) // too long loop? |
| Value *delim_code=params->size()==3+1+1?static_cast<Value *>(params->get(3+1)):0; | throw Exception("parser.runtime", |
| &method_name, | |
| "endless loop detected"); | |
| bool need_delim=false; | bool need_delim=false; |
| VInt *vint=new(pool) VInt(pool, 0); | VInt *vint=new(pool) VInt(pool, 0); |
| int endless_loop_count=0; | |
| for(int i=from; i<=to; i++) { | for(int i=from; i<=to; i++) { |
| if(++endless_loop_count>=2001) // endless loop? | |
| PTHROW(0, 0, | |
| &method_name, | |
| "endless loop detected"); | |
| vint->set_int(i); | vint->set_int(i); |
| r.wcontext->put_element(var_name, vint); | r.root->put_element(var_name, vint); |
| Value& processed_body=r.process(body_code); | StringOrValue processed_body=r.process(body_code); |
| if(delim_code) { // delimiter set? | if(delim_maybe_code) { // delimiter set? |
| const String *string=processed_body.get_string(); | const String *string=processed_body.get_string(); |
| if(need_delim && string && string->size()) // need delim & iteration produced string? | if(need_delim && string && string->size()) // 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(processed_body); |
| } | } |
| } | } |
| static void _eval(Request& r, const String& method_name, Array *params) { | static void _eval(Request& r, const String& method_name, MethodParams *params) { |
| Value& expr=*static_cast<Value *>(params->get(0)); | Value& expr=params->as_junction(0, "need expression"); |
| r.fail_if_junction_(false, expr, | |
| method_name, "need expression"); | |
| // evaluate expresion | // evaluate expresion |
| Value *result=r.process(expr, | Value *result=r.process_to_value(expr, |
| 0/*no name*/, | /*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->size()>1) { |
| Value& fmt=*static_cast<Value *>(params->get(1)); | Value& fmt=params->as_no_junction(1, "fmt must not be code"); |
| // forcing ^format[this param type] | |
| r.fail_if_junction_(true, fmt, | |
| method_name, "fmt must not be code"); | |
| Pool& pool=r.pool(); | Pool& pool=r.pool(); |
| String& string=*new(pool) String(pool); | String& string=*new(pool) String(pool); |
| string.APPEND_CONST(format(pool, result->as_double(), fmt.as_string().cstr())); | string.APPEND_CONST(format(pool, result->as_double(), fmt.as_string().cstr())); |
| result=new(pool) VString(string); | result=new(pool) VString(string); |
| } | } |
| result->set_name(method_name); | |
| r.write_no_lang(*result); | r.write_no_lang(*result); |
| } | } |
| static void _connect(Request& r, const String& method_name, MethodParams *params) { | |
| typedef double (*math_one_double_op_func_ptr)(double); | |
| static double round(double op) { return floor(op+0.5); } | |
| static double sign(double op) { return op > 0 ? 1 : ( op < 0 ? -1 : 0 ); } | |
| static void double_one_op( | |
| Request& r, | |
| const String& method_name, Array *params, | |
| math_one_double_op_func_ptr func) { | |
| Pool& pool=r.pool(); | Pool& pool=r.pool(); |
| Value& param=*static_cast<Value *>(params->get(0)); | #ifdef RESOURCES_DEBUG |
| struct timeval mt[2]; | |
| // forcing ^round(this param type) | #endif |
| r.fail_if_junction_(false, param, | Value& url=params->as_no_junction(0, "url must not be code"); |
| method_name, "parameter must be expression"); | 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 | |
| SQL_Connection_ptr connection=SQL_driver_manager->get_connection( | |
| url.as_string(), method_name, protocol2driver_and_client); | |
| Value& result=*new(pool) VDouble(pool, (*func)(r.process(param).as_double())); | #ifdef RESOURCES_DEBUG |
| r.write_no_lang(result); | //measure:after connect |
| gettimeofday(&mt[1],NULL); | |
| 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 | |
| try { | |
| r.write_assign_lang(r.process(body_code)); | |
| } catch(...) { // process problem | |
| connection->mark_to_rollback(); | |
| /*re*/throw; | |
| } | |
| } | } |
| static void _round(Request& r, const String& method_name, Array *params) { | #ifndef DOXYGEN |
| double_one_op(r, method_name, params, &round); | struct Switch_data { |
| Request *r; | |
| Value *searching; | |
| Value *found; | |
| Value *_default; | |
| }; | |
| #endif | |
| static void _switch(Request& r, const String&, MethodParams *params) { | |
| Switch_data data={&r, &r.process_to_value(params->get(0))}; | |
| Temp_hash_value switch_data_setter(r.classes_conf, *switch_data_name, &data); | |
| Value& cases_code=params->as_junction(1, "switch cases must be code"); | |
| // execution of found ^case[...]{code} must be in context of ^switch[...]{code} | |
| // because of stacked WWrapper used there as wcontext | |
| r.process(cases_code, true/*intercept_string*/); | |
| if(Value *selected_code=data.found ? data.found : data._default) { | |
| // setting code context, would execute in ^switch[...]{>>context<<} | |
| selected_code->get_junction()->change_context(cases_code.get_junction()); | |
| r.write_pass_lang(r.process(*selected_code)); | |
| } | |
| } | } |
| static void _floor(Request& r, const String& method_name, Array *params) { | static void _case(Request& r, const String& method_name, MethodParams *params) { |
| double_one_op(r, method_name, params, &floor); | Pool& pool=r.pool(); |
| Switch_data *data=static_cast<Switch_data *>(r.classes_conf.get(*switch_data_name)); | |
| if(!data) | |
| throw Exception("parser.runtime", | |
| &method_name, | |
| "without switch"); | |
| int count=params->size(); | |
| Value *code=¶ms->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++) { | |
| Value& value=r.process_to_value(params->get(i)); | |
| if(value.as_string() == CASE_DEFAULT_VALUE) { | |
| data->_default=code; | |
| break; | |
| } | |
| bool matches; | |
| if(data->searching->is_string()) | |
| matches=data->searching->as_string() == value.as_string(); | |
| else | |
| matches=data->searching->as_double() == value.as_double(); | |
| if(matches) { | |
| if(data->found) | |
| throw Exception("parser.runtime", | |
| &method_name, | |
| "duplicate found"); | |
| data->found=code; | |
| break; | |
| } | |
| } | |
| } | } |
| static void _ceiling(Request& r, const String& method_name, Array *params) { | // cache-- |
| double_one_op(r, method_name, params, &ceil); | |
| // consts | |
| const int DATA_STRING_SERIALIZED_VERSION=0x0002; | |
| // 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 | |
| struct Cache_data { | |
| time_t expires; | |
| }; | |
| struct Locked_process_and_cache_put_action_info { | |
| Request *r; | |
| Cache_data *data; | |
| Value *body_code; const String *evaluated_body; | |
| }; | |
| #endif | |
| 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); | |
| // 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 | |
| void *data; size_t data_size; | |
| info.evaluated_body->serialize( | |
| sizeof(Data_string_serialized_prolog), | |
| data, data_size); | |
| Data_string_serialized_prolog& prolog= | |
| *static_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, | |
| Value& body_code, | |
| Cache_data& data, | |
| const String& file_spec) { | |
| Locked_process_and_cache_put_action_info info={ | |
| &r, | |
| &data, | |
| &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*/) ? info.evaluated_body: 0; | |
| if(data.expires==0) | |
| cache_delete(file_spec); | |
| return result; | |
| } | |
| String *cache_get(Pool& pool, const String& file_spec, time_t now) { | |
| void* data; size_t data_size; | |
| if(file_read(pool, file_spec, | |
| data, data_size, | |
| false/*as_text*/, | |
| false/*fail_on_read_problem*/) | |
| && data_size/* ignore reads which are empty due to | |
| non-unary open+lockEX conflict with lockSH */) { | |
| Data_string_serialized_prolog& prolog= | |
| *static_cast<Data_string_serialized_prolog *>(data); | |
| String *result=new(pool) String(pool); | |
| if( | |
| data_size>=sizeof(Data_string_serialized_prolog) | |
| && prolog.version==DATA_STRING_SERIALIZED_VERSION | |
| && prolog.expires > now | |
| && result->deserialize( | |
| sizeof(Data_string_serialized_prolog), data, data_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; | |
| Value& vlifespan_or_expires=params->get(index); | |
| if(strcmp(vlifespan_or_expires.type(), VDATE_TYPE)==0) | |
| result=static_cast<VDate&>(vlifespan_or_expires).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) { | |
| Pool& pool=r.pool(); | |
| time_t now=time(0); | |
| // ^cache[filename] ^cache(seconds) ^cache[expires date] | |
| if(params->size()==1) { | |
| if(params->get(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)); | |
| 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")); | |
| static void _abs(Request& r, const String& method_name, Array *params) { | Cache_data data; |
| double_one_op(r, method_name, params, &fabs); | 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... | |
| // 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(String *cached_body=cache_get(pool, 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 | |
| } | } |
| static void _sign(Request& r, const String& method_name, Array *params) { | // also used in pa_request.C to pass param to @unhandled_exception |
| double_one_op(r, method_name, params, &sign); | VHash& exception2vhash(Pool& pool, const Exception& e) { |
| VHash& result=*new(pool) VHash(pool); | |
| Hash& hash=result.hash(0); | |
| if(const char *type=e.type()) | |
| hash.put(*exception_type_part_name, new(pool) VString(*new(pool) String(pool, type))); | |
| if(const String *asource=e.problem_source()) { | |
| String& source=*new(pool) String(pool); | |
| source.append(*asource, String::UL_TAINTED, true/*forced*/); | |
| result.set_name(source); | |
| hash.put(*exception_source_part_name, new(pool) VString(source)); | |
| #ifndef NO_STRING_ORIGIN | |
| const Origin& origin=source.origin(); | |
| hash.put(*new(pool) String(pool, "file", 0, true), | |
| 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; | |
| } | } |
| /// ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s} | static void _try_operator(Request& r, const String& method_name, MethodParams *params) { |
| /** | |
| @test make params not Array but something with useful method for extracting, | |
| with typecast and junction/not test | |
| */ | |
| static void _connect(Request& r, const String& method_name, Array *params) { | |
| Pool& pool=r.pool(); | Pool& pool=r.pool(); |
| Value& url=*static_cast<Value *>(params->get(0)); | Value& body_code=params->as_junction(0, "body_code must be code"); |
| r.fail_if_junction_(true, url, | Value& catch_code=params->as_junction(1, "catch_code must be code"); |
| method_name, "url must not be code"); | |
| Value& body_code=*static_cast<Value *>(params->get(1)); | |
| r.fail_if_junction_(false, body_code, | |
| method_name, "body must be code"); | |
| // connect | StringOrValue result; |
| SQL_Connection& connection=SQL_driver_manager->get_connection( | |
| url.as_string(), r.protocol2library); | |
| Exception rethrow_me; | // taking snapshot of request processing status |
| // remember/set current connection | //int ssexception_trace=r.exception_trace.top_index(); |
| SQL_Connection *saved_connection=r.connection; | int sstack=r.stack.top_index(); |
| r.connection=&connection; | Value *sself=r.self, *sroot=r.root, *srcontext=r.rcontext; |
| // execute body | WContext *swcontext=r.wcontext; |
| bool body_failed=false; | try { |
| PTRY | result=r.process(body_code); |
| r.write_assign_lang(r.process(body_code)); | } catch(const Exception& e) { |
| PCATCH(e) { // connect/process problem | // restoring request processing status |
| rethrow_me=e; body_failed=true; | //r.exception_trace.top_index(ssexception_trace); |
| } | r.stack.top_index(sstack); |
| PEND_CATCH | r.self=sself; r.root=sroot, r.rcontext=srcontext; r.wcontext=swcontext; |
| VHash& vhash=exception2vhash(pool, e); | |
| bool finalizer_failed=false; | Junction *junction=catch_code.get_junction(); |
| PTRY | Value *saved_exception_var_value=junction->root->get_element(*exception_var_name); |
| // FINALLY | junction->root->put_element(*exception_var_name, &vhash); |
| if(body_failed) | result=r.process(catch_code); |
| connection.rollback(); | bool handled=false; |
| else | if(Value *value=static_cast<Value *>(vhash.hash(0).get(*exception_handled_part_name))) |
| connection.commit(); | handled=value->as_bool(); |
| PCATCH(e) { // commit/rollback problem | junction->root->put_element(*exception_var_name, saved_exception_var_value); |
| rethrow_me=e; finalizer_failed=true; | |
| if(!handled) | |
| throw(e); // rethrow | |
| } | } |
| PEND_CATCH | // write it out |
| r.write_pass_lang(result); | |
| } | |
| // close connection [cache it] | static void _throw_operator(Request& r, const String& method_name, MethodParams *params) { |
| connection.close(); | Pool& pool=r.pool(); |
| // recall current connection from remembered | |
| r.connection=saved_connection; | |
| if(body_failed || finalizer_failed) // were there an exception for us to rethrow? | if(params->size()==1) { |
| PTHROW(rethrow_me.type(), rethrow_me.code(), | Value& param0=params->get(0); |
| rethrow_me.problem_source(), | if(Hash *hash=param0.get_hash(&method_name)) { |
| rethrow_me.comment()); | const char *type=0; |
| if(Value *value=static_cast<Value *>(hash->get(*exception_type_part_name))) | |
| type=value->as_string().cstr(); | |
| const String *source=0; | |
| if(Value *value=static_cast<Value *>(hash->get(*exception_source_part_name))) | |
| source=&value->as_string(); | |
| const char *comment=0; | |
| if(Value *value= | |
| static_cast<Value *>(hash->get(*exception_comment_part_name))) | |
| comment=value->as_string().cstr(); | |
| throw Exception(type, | |
| source?source:&method_name, | |
| comment); | |
| } 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->as_string(2, "comment must be string").cstr(); | |
| throw Exception(type, &source, comment); | |
| } | |
| } | } |
| // constructor | |
| // initialize | MOP::MOP(Pool& apool) : Methoded(apool), |
| main_sql_name(apool, MAIN_SQL_NAME), | |
| main_sql_drivers_name(apool, MAIN_SQL_DRIVERS_NAME) | |
| { | |
| set_name(*NEW String(pool(), OP_CLASS_NAME)); | |
| void initialize_op_class(Pool& pool, VStateless_class& vclass) { | |
| // ^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} |
| vclass.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} |
| vclass.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} |
| 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] |
| vclass.add_native_method("process", Method::CT_ANY, _process, 1, 1); | add_native_method("process", Method::CT_ANY, _process, 1, 1); |
| // ^rem{code} | // ^rem{code} |
| vclass.add_native_method("rem", Method::CT_ANY, _rem, 1, 1); | add_native_method("rem", Method::CT_ANY, _rem, 1, 10000); |
| // ^while(condition){code} | // ^while(condition){code} |
| vclass.add_native_method("while", Method::CT_ANY, _while, 2, 2); | add_native_method("while", Method::CT_ANY, _while, 2, 2); |
| // ^use[file] | // ^use[file] |
| vclass.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] |
| vclass.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] |
| vclass.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} | |
| add_native_method("connect", Method::CT_ANY, _connect, 2, 2); | |
| // math functions | |
| // ^round(expr) | // ^cache[file_spec] delete cache |
| vclass.add_native_method("round", Method::CT_ANY, _round, 1, 1); | // ^cache[file_spec](time){code} time=0 no cache |
| add_native_method("cache", Method::CT_ANY, _cache, 1, 3); | |
| // switch | |
| // ^floor(expr) | // ^switch[value]{cases} |
| vclass.add_native_method("floor", Method::CT_ANY, _floor, 1, 1); | add_native_method("switch", Method::CT_ANY, _switch, 2, 2); |
| // ^ceiling(expr) | // ^case[value]{code} |
| vclass.add_native_method("ceiling", Method::CT_ANY, _ceiling, 1, 1); | add_native_method("case", Method::CT_ANY, _case, 2, 10000); |
| // ^abs(expr) | // try-catch |
| vclass.add_native_method("abs", Method::CT_ANY, _abs, 1, 1); | |
| // ^sign(expr) | // ^try{code}{catch code} |
| vclass.add_native_method("sign", Method::CT_ANY, _sign, 1, 1); | 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); | |
| } | |
| // connect | |
| // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s} | // constructor & configurator |
| vclass.add_native_method("connect", Method::CT_ANY, _connect, 2, 2); | |
| Methoded *MOP_create(Pool& pool) { | |
| return new(pool) MOP(pool); | |
| } | |
| void MOP::configure_user(Request& r) { | |
| Pool& pool=r.pool(); | |
| // $MAIN:SQL.drivers | |
| if(Value *sql=r.main_class->get_element(main_sql_name)) | |
| if(Value *element=sql->get_element(main_sql_drivers_name)) | |
| if(Table *protocol2library=element->get_table()) | |
| r.classes_conf.put(name(), protocol2library); | |
| } | } |