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| version 1.55, 2001/11/01 16:11:03 | version 1.99, 2002/08/01 11:41:12 |
|---|---|
| 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, 2002 ArtLebedev Group (http://www.artlebedev.com) |
| Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf) | Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru) |
| $Id$ | |
| */ | */ |
| static const char* IDENT_OP_C="$Date$"; | |
| #include "classes.h" | #include "classes.h" |
| #include "pa_config_includes.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" | |
| // limits | // limits |
| Line 20 | Line 20 |
| // defines | // defines |
| #define OP_CLASS_NAME "OP" | #define CASE_DEFAULT_VALUE "DEFAULT" |
| // class | // class |
| Line 41 private: | Line 41 private: |
| static void _if(Request& r, const String&, MethodParams *params) { | static void _if(Request& r, const String&, 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(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"))); |
| Line 53 static void _if(Request& r, const String | Line 53 static void _if(Request& r, const String |
| 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(); | Pool& pool=r.pool(); |
| const String& lang_name=params->as_string(0, "lang must be 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 { |
| throw Exception(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=params->as_junction(1, "body must be code"); | Value& vbody=params->as_junction(params->size()-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 |
| Line 72 static void _untaint(Request& r, const S | Line 76 static void _untaint(Request& r, const S |
| static void _taint(Request& r, const String&, MethodParams *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=params->as_string(0, "lang must be string"); | const String& lang_name=params->as_string(0, "lang must be string"); |
| lang=static_cast<String::Untaint_lang>( | lang=untaint_lang_name2enum->get_int(lang_name); |
| untaint_lang_name2enum->get_int(lang_name)); | |
| if(!lang) | if(!lang) |
| throw Exception(0, 0, | throw Exception(0, |
| &lang_name, | &lang_name, |
| "invalid taint language"); | "invalid taint language"); |
| } | } |
| Line 88 static void _taint(Request& r, const Str | Line 91 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->size()-1, "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 97 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, MethodParams *params) { | static void _process(Request& r, const String& method_name, MethodParams *params) { |
| Pool& pool=r.pool(); | |
| // 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, method_name.cstr(), MAX_STRING-1); place[MAX_STRING-1]=0; | 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, r.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(params->as_no_junction(0, "body must be string")).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)), | |
| *new(pool) String(pool, heap_place, place_size, true /*tainted*/), | |
| 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(r.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); | |
| } | } |
| } | } |
| Line 146 static void _while(Request& r, const Str | Line 163 static void _while(Request& r, const Str |
| 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(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 176 static void _for(Request& r, const Strin | Line 191 static void _for(Request& r, const Strin |
| 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->size()>4?¶ms->get(4):0; | Value *delim_maybe_code=params->size()>4?¶ms->get(4):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); | VInt *vint=new(pool) VInt(pool, 0); |
| int endless_loop_count=0; | r.root->put_element(var_name, vint); |
| for(int i=from; i<=to; i++) { | for(int i=from; i<=to; i++) { |
| if(++endless_loop_count>=MAX_LOOPS) // endless loop? | |
| throw Exception(0, 0, | |
| &method_name, | |
| "endless loop detected"); | |
| vint->set_int(i); | vint->set_int(i); |
| r.self/*root*/->put_element(var_name, vint); | |
| Value& processed_body=r.process(body_code); | StringOrValue processed_body=r.process(body_code); |
| if(delim_maybe_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? |
| Line 201 static void _for(Request& r, const Strin | Line 216 static void _for(Request& r, const Strin |
| 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"); | Value& expr=params->as_junction(0, "need expression"); |
| // evaluate expresion | // evaluate expresion |
| Value *result=r.process(expr, | Value *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()>1) { | if(params->size()>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"); |
| 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, value_result->as_double(), fmt.as_string().cstr())); |
| result=new(pool) VString(string); | r.write_no_lang(string); |
| } | } else |
| result->set_name(method_name); | r.write_no_lang(*value_result); |
| r.write_no_lang(*result); | |
| } | |
| static void _error(Request& r, const String& method_name, MethodParams *params) { | |
| Pool& pool=r.pool(); | |
| const String& serror=params->as_string(0, "message must be string"); | |
| throw Exception(0, 0, | |
| &method_name, | |
| "%s", serror.cstr()); | |
| } | } |
| /// @todo rewrite ugly code with try/try to autoobject TempConnection | |
| static void _connect(Request& r, const String& method_name, MethodParams *params) { | static void _connect(Request& r, const String& method_name, MethodParams *params) { |
| Pool& pool=r.pool(); | Pool& pool=r.pool(); |
| #ifdef RESOURCES_DEBUG | |
| struct timeval mt[2]; | |
| #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= |
| static_cast<Table *>(r.classes_conf.get(r.OP.name())); | 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_Connection_ptr connection=SQL_driver_manager->get_connection( |
| url.as_string(), method_name, protocol2driver_and_client); | url.as_string(), method_name, protocol2driver_and_client); |
| // remember/set current connection | #ifdef RESOURCES_DEBUG |
| SQL_Connection *saved_connection=r.connection; | //measure:after connect |
| r.connection=&connection; | 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 | // execute body |
| try { | try { |
| try { | r.write_assign_lang(r.process(body_code)); |
| r.write_assign_lang(r.process(body_code)); | } catch(...) { // process problem |
| connection->mark_to_rollback(); | |
| connection.commit(); | /*re*/throw; |
| } catch(...) { // process/commit problem | |
| connection.rollback(); | |
| /*re*/throw; | |
| } | |
| } catch(...) { | |
| // close connection [cache it] | |
| connection.close(); | |
| // recall current connection from remembered | |
| r.connection=saved_connection; | |
| /*re*/throw; | |
| } | } |
| // and anyway | |
| // close connection [cache it] | |
| connection.close(); | |
| // recall current connection from remembered | |
| r.connection=saved_connection; | |
| } | } |
| #ifndef DOXYGEN | #ifndef DOXYGEN |
| struct Switch_data { | struct Switch_data { |
| Request *r; | |
| Value *searching; | Value *searching; |
| Value *found; | Value *found; |
| Value *_default; | Value *_default; |
| }; | }; |
| #endif | #endif |
| static void _switch(Request& r, const String&, MethodParams *params) { | static void _switch(Request& r, const String&, MethodParams *params) { |
| void *backup=r.classes_conf.get(*switch_data_name); | Switch_data data={&r, &r.process_to_value(params->get(0))}; |
| Switch_data data={&r.process(params->get(0))}; | Temp_hash_value switch_data_setter(r.classes_conf, *switch_data_name, &data); |
| 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) | Value& cases_code=params->as_junction(1, "switch cases must be code"); |
| r.write_pass_lang(r.process(*code)); | // execution of found ^case[...]{code} must be in context of ^switch[...]{code} |
| // because of stacked WWrapper used there as wcontext | |
| r.process(cases_code, true/*intercept_string*/); | |
| if(Value *selected_code=data.found ? data.found : data._default) { | |
| // setting code context, would execute in ^switch[...]{>>context<<} | |
| selected_code->get_junction()->change_context(cases_code.get_junction()); | |
| r.write_pass_lang(r.process(*selected_code)); | |
| } | |
| } | } |
| static void _case(Request& r, const String& method_name, MethodParams *params) { | static void _case(Request& r, const String& method_name, MethodParams *params) { |
| Line 296 static void _case(Request& r, const Stri | Line 297 static void _case(Request& r, const Stri |
| 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(0, 0, | throw Exception("parser.runtime", |
| &method_name, | &method_name, |
| "without switch"); | "without switch"); |
| int count=params->size(); | int count=params->size(); |
| Value *code=¶ms->as_junction(--count, "case result must be code"); | 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++) { | for(int i=0; i<count; i++) { |
| Value& value=r.process(params->get(i)); | Value& value=r.process_to_value(params->get(i)); |
| if(value.as_string() == *case_default_value) { | if(value.as_string() == CASE_DEFAULT_VALUE) { |
| data->_default=code; | data->_default=code; |
| break; | break; |
| } | } |
| Line 317 static void _case(Request& r, const Stri | Line 323 static void _case(Request& r, const Stri |
| matches=data->searching->as_double() == value.as_double(); | matches=data->searching->as_double() == value.as_double(); |
| if(matches) { | if(matches) { |
| if(data->found) | |
| throw Exception("parser.runtime", | |
| &method_name, | |
| "duplicate found"); | |
| data->found=code; | data->found=code; |
| break; | break; |
| } | } |
| } | } |
| } | } |
| // cache-- | |
| // 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*/, | |
| false/*fail on lock problem*/) ? 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")); | |
| Cache_data data; | |
| 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 | |
| } | |
| // also used in pa_request.C to pass param to @unhandled_exception | |
| VHash& exception2vhash(Pool& pool, const Exception& e) { | |
| VHash& result=*new(pool) VHash(pool); | |
| Hash& hash=result.hash(0); | |
| if(const char *type=e.type(true)) | |
| 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*/); | |
| 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(true)) { | |
| 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, const String& method_name, MethodParams *params) { | |
| Pool& pool=r.pool(); | |
| Value& body_code=params->as_junction(0, "body_code must be code"); | |
| Value& catch_code=params->as_junction(1, "catch_code must be code"); | |
| StringOrValue result; | |
| // taking snapshot of request processing status | |
| //int ssexception_trace=r.exception_trace.top_index(); | |
| int sstack=r.stack.top_index(); | |
| Value *sself=r.self, *sroot=r.root, *srcontext=r.rcontext; | |
| WContext *swcontext=r.wcontext; | |
| try { | |
| result=r.process(body_code); | |
| } catch(const Exception& e) { | |
| // restoring request processing status | |
| //r.exception_trace.top_index(ssexception_trace); | |
| r.stack.top_index(sstack); | |
| r.self=sself; r.root=sroot, r.rcontext=srcontext; r.wcontext=swcontext; | |
| VHash& vhash=exception2vhash(pool, e); | |
| Junction *junction=catch_code.get_junction(); | |
| Value *saved_exception_var_value=junction->root->get_element(*exception_var_name); | |
| junction->root->put_element(*exception_var_name, &vhash); | |
| result=r.process(catch_code); | |
| bool handled=false; | |
| if(Value *value=static_cast<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(); | |
| 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->size()>2?params->as_string(2, "comment must be string").cstr():0; | |
| throw Exception(type, &source, "%s", comment?comment:""); | |
| } | |
| } | |
| // constructor | // constructor |
| MOP::MOP(Pool& apool) : Methoded(apool), | MOP::MOP(Pool& apool) : Methoded(apool, "OP"), |
| main_sql_name(apool, MAIN_SQL_NAME), | main_sql_name(apool, MAIN_SQL_NAME), |
| main_sql_drivers_name(apool, MAIN_SQL_DRIVERS_NAME) | main_sql_drivers_name(apool, MAIN_SQL_DRIVERS_NAME) |
| { | { |
| set_name(*NEW String(pool(), OP_CLASS_NAME)); | |
| // ^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); |
| Line 360 MOP::MOP(Pool& apool) : Methoded(apool), | Line 671 MOP::MOP(Pool& apool) : Methoded(apool), |
| // ^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); |
| // ^error[msg] | |
| add_native_method("error", Method::CT_ANY, _error, 1, 1); | |
| // ^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} |
| Line 374 MOP::MOP(Pool& apool) : Methoded(apool), | Line 686 MOP::MOP(Pool& apool) : Methoded(apool), |
| // ^case[value]{code} | // ^case[value]{code} |
| add_native_method("case", Method::CT_ANY, _case, 2, 10000); | add_native_method("case", Method::CT_ANY, _case, 2, 10000); |
| // try-catch | |
| // ^try{code}{catch code} | |
| 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); | |
| } | } |
| // constructor & configurator | // constructor & configurator |