--- parser3/src/include/pa_request.h 2001/01/29 21:51:51 1.2 +++ parser3/src/include/pa_request.h 2003/01/30 14:59:43 1.160.2.7 @@ -1,28 +1,419 @@ -/* - $Id: pa_request.h,v 1.2 2001/01/29 21:51:51 paf Exp $ +/** @file + Parser: request class decl. + + Copyright (c) 2001, 2003 ArtLebedev Group (http://www.artlebedev.com) + Author: Alexandr Petrosian (http://paf.design.ru) */ #ifndef PA_REQUEST_H #define PA_REQUEST_H +static const char* IDENT_REQUEST_H="$Date: 2003/01/30 14:59:43 $"; + #include "pa_pool.h" -#include "pa_error.h" +#include "pa_request_info.h" +#include "pa_hash.h" +#include "pa_wcontext.h" +#include "pa_value.h" +#include "pa_stack.h" +#include "pa_vclass.h" +#include "pa_vobject.h" +#include "pa_venv.h" +#include "pa_vstatus.h" +#include "pa_vform.h" +#include "pa_vmail.h" +#include "pa_vmath.h" +#include "pa_vrequest.h" +#include "pa_vresponse.h" +#include "pa_vcookie.h" +#include "pa_request_info.h" +#include "pa_request_charsets.h" + +#ifdef RESOURCES_DEBUG +#include +#endif + +// consts + +const uint ANTI_ENDLESS_EXECUTE_RECOURSION=500; + +// defines + +#ifndef NO_STRING_ORIGIN +# define COMPILE_PARAMS \ + VStateless_class& aclass, const char *source \ + , const char *file +# define COMPILE(aclass, source, file) \ + real_compile(aclass, source, file) +#else +# define COMPILE_PARAMS \ + VStateless_class& aclass, const char *source +# define COMPILE(aclass, source, file) \ + real_compile(aclass, source) +#endif + +class Temp_lang; +class Methoded; +class VMethodFrame; + +/// Main workhorse. +class Request: public PA_Object { + friend class Temp_lang; + friend class Temp_connection; + friend class Request_context_saver; + friend class Temp_request_self; + + /// all files and classes and other hard-to-place allocations go to this pool + Pool fpool; + + ///@{ core data + + typedef Hash classes_type; + + /// classes + classes_type fclasses; + + /// already used files to avoid cyclic uses + Hash used_files; + + /** endless execute(execute(... preventing counter + @see ANTI_ENDLESS_EXECUTE_RECOURSION + */ + uint anti_endless_execute_recoursion; + + ///@} + +public: + //@{ request processing status + /// exception stack trace + Stack exception_trace; + /// execution stack + Stack stack; + /// contexts + VMethodFrame *method_frame; + Value *rcontext; + WContext *wcontext; + /// current language + uchar flang; + /// current connection + SQL_Connection *fconnection; + //@} + /// interrupted flag, raised on signals [SIGPIPE] + bool finterrupted; -class Request { public: + + /// all files and classes and other hard-to-place allocations go to this pool + Pool& pool() { return fpool; } + +#ifdef RESOURCES_DEBUG + /// measures + double sql_connect_time; + double sql_request_time; +#endif + + Request( + Request_info& ainfo, + uchar adefault_lang, ///< all tainted data default untainting lang + bool status_allowed ///< status class allowed + ); + ~Request(); + + /// global classes + classes_type& classes() { return fclasses; } + + /** + core request processing + + BEWARE: may throw exception to you: catch it! + */ + void core( + const char *config_filespec, ///< system config filespec + bool config_fail_on_read_problem, ///< fail if system config file not found + bool header_only); + + /// executes ops + void execute(const Array& ops); // execute.C + /// execute ops with anti-recoursion check + void recoursion_checked_execute(ConstStringPtr name, const Array& ops) { + // anti_endless_execute_recoursion + if(++anti_endless_execute_recoursion==ANTI_ENDLESS_EXECUTE_RECOURSION) { + anti_endless_execute_recoursion=0; // give @exception a chance + throw Exception("parser.runtime", + name, + "call canceled - endless recursion detected"); + } + execute(ops); // execute it + anti_endless_execute_recoursion--; + } + + /// compiles the file, maybe forcing it's class @a name and @a base_class. + VStateless_classPtr use_file(VStateless_class& aclass, + ConstStringPtr file_name, + bool ignore_class_path=false, + bool fail_on_read_problem=true, bool fail_on_file_absence=true); // core.C + /// compiles a @a source buffer + VStateless_classPtr use_buf(VStateless_class& aclass, + const char *source, + const String& filespec, const char *filespec_cstr); // core.C + + /// processes any code-junction there may be inside of @a value + StringOrValue process(ValuePtr input_value, bool intercept_string=true); // execute.C + //@{ convinient helpers + ConstStringPtr process_to_string(ValuePtr input_value) { + return process(input_value, true/*intercept_string*/).as_string(&pool()); + } + ValuePtr process_to_value(ValuePtr input_value, bool intercept_string=true) { + return process(input_value, intercept_string).as_value(); + } + //@} + - // all request' objects are allocated in this pool - // they die with request - Pool pool; +#define DEFINE_DUAL(modification) \ + void write_##modification##_lang(StringOrValue dual) { \ + if(ConstStringPtr string=dual.get_string()) \ + write_##modification##_lang(*string); \ + else \ + write_##modification##_lang(dual.get_value()); \ + } +#define DEFINE_DUAL_CHECKED(modification) \ + void write_##modification##_lang(StringOrValue dual, ConstStringPtr origin) { \ + if(ConstStringPtr string=dual.get_string()) \ + write_##modification##_lang(*string); \ + else \ + write_##modification##_lang(dual.get_value(), origin); \ + } + + /// appending, sure of clean string inside + void write_no_lang(const String& astring) { + wcontext->write(astring, + String::UL_CLEAN | flang&String::UL_OPTIMIZE_BIT); + } + /// appending sure value, that would be converted to clean string + void write_no_lang(ValuePtr avalue) { + if(wcontext->get_in_expression()) + wcontext->write(avalue); + else + wcontext->write(pool(), avalue, + String::UL_CLEAN | flang&String::UL_OPTIMIZE_BIT); + } + + /// appending string, passing language built into string being written + void write_pass_lang(const String& astring) { + wcontext->write(astring, String::UL_PASS_APPENDED); + } + /// appending possible string, passing language built into string being written + void write_pass_lang(ValuePtr avalue) { + wcontext->write(pool(), avalue, String::UL_PASS_APPENDED); + } + DEFINE_DUAL(pass) + + /// appending possible string, assigning untaint language + void write_assign_lang(ValuePtr avalue) { + wcontext->write(pool(), avalue, flang); + } + /// appending possible string, assigning untaint language + void write_assign_lang(ValuePtr avalue, ConstStringPtr origin) { + wcontext->write(pool(), avalue, flang, origin); + } + /// appending string, assigning untaint language + void write_assign_lang(const String& astring) { + wcontext->write(astring, flang); + } + DEFINE_DUAL(assign) + DEFINE_DUAL_CHECKED(assign) + + /// returns relative to @a path path to @a file + const String& relative(const char *apath, const String& relative_name); + + /// returns an absolute @a path to relative @a name + const String& absolute(const String& relative_name); + + /// returns the mime type of 'user_file_name_cstr' + const String& mime_type_of(const char *user_file_name_cstr); + + /// returns current SQL connection if any + SQL_Connection *connection(ConstStringPtr source) { + if(!fconnection && source) + throw Exception("parser.runtime", + source, + "outside of 'connect' operator"); + + return fconnection; + } + + bool origins_mode(); + + void interrupt() { finterrupted=true; } + bool interrupted() { return finterrupted; } + +public: - // these errors handled on global(request) level - Error request_error; + /// info from web server + Request_info& info; + + /// source, client, mail charsets + Request_charsets charsets; + + /// 'MAIN' class conglomerat & operators are methods of this class + VClass& main_class; + /// $env:fields + VEnv env; + /// $status:fields + VStatus status; + /// $form:elements + VForm form; + /// $mail + VMail mail; + /// $math:constants + VMath math; + /// $request:elements + VRequest request; + /// $response:elements + VResponse response; + /// $cookie:elements + VCookie cookie; + + /// classes configured data + HashStringValue classes_conf; + +public: // status read methods + + VMethodFrame *get_method_frame() { return method_frame; } + Value *get_self(); + +private: + + /// already executed some @conf method + bool configure_admin_done; + + void configure_admin(VStateless_class& conf_class, const String *source); + +private: // compile.C + + VStateless_class& real_compile(COMPILE_PARAMS); + +private: // execute.C + + /// for @postprocess[body] + const String& execute_method(VMethodFrame& amethodFrame, const Method& method); + //{ for @conf[filespec] and @auto[filespec] + void execute_method(Value& aself, + const Method& method, VString *optional_param, + const String **return_string); + void execute_nonvirtual_method(VStateless_class& aclass, + const String& method_name, VString *optional_param, + const String **return_string, + const Method **return_method=0); + //} + /// for @main[] + const String *execute_virtual_method(Value& aself, const String& method_name); + + Value *get_element(const String *& remember_name, bool can_call_operator); + +private: // defaults + + const uchar fdefault_lang; + Value *default_content_type; - // these errors handled on local(operator) level - Error operator_error; +private: // mime types - Request() {} - ~Request() {} + /// $MAIN:MIME-TYPES + Table *mime_types; + +private: // lang manipulation + + uchar set_lang(uchar alang) { + uchar result=flang; + flang=alang; + return result; + } + void restore_lang(uchar alang) { + flang=alang; + } + +private: // connection manipulation + + SQL_Connection *set_connection(SQL_Connection *aconnection) { + SQL_Connection *result=fconnection; + fconnection=aconnection; + return result; + } + void restore_connection(SQL_Connection *aconnection) { + fconnection=aconnection; + } + +private: + + void output_result(const VFile& body_file, bool header_only, bool as_attachment); }; +/// Auto-object used to save request context across ^try body +class Request_context_saver { + Request& fr; + + /// exception stack trace + int exception_trace; + /// execution stack + int stack; + /// contexts + VMethodFrame *method_frame; + Value *rcontext; + WContext *wcontext; + /// current language + uchar flang; + /// current connection + SQL_Connection *fconnection; + +public: + Request_context_saver(Request& ar) : + exception_trace(ar.exception_trace.top_index()), + stack(ar.stack.top_index()), + method_frame(ar.method_frame), + rcontext(ar.rcontext), + wcontext(ar.wcontext), + flang(ar.flang), + fconnection(ar.fconnection), + fr(ar) {} + void restore() { + fr.exception_trace.top_index(exception_trace); + fr.stack.top_index(stack); + fr.method_frame=method_frame, fr.rcontext=rcontext; fr.wcontext=wcontext; + fr.flang=flang; + fr.fconnection=fconnection; + } +}; + +/// Auto-object used for temporary changing Request::flang. +class Temp_lang { + Request& frequest; + uchar saved_lang; +public: + Temp_lang(Request& arequest, uchar alang) : + frequest(arequest), + saved_lang(arequest.set_lang(alang)) { + } + ~Temp_lang() { + frequest.restore_lang(saved_lang); + } +}; + +/// Auto-object used for temporary changing Request::fconnection. +class Temp_connection { + Request& frequest; + SQL_Connection *saved_connection; +public: + Temp_connection(Request& arequest, SQL_Connection *aconnection) : + frequest(arequest), + saved_connection(arequest.set_connection(aconnection)) { + } + ~Temp_connection() { + frequest.restore_connection(saved_connection); + } +}; + +// externs + +extern StringPtr main_method_name; + #endif