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version 1.5, 2001/02/21 11:10:02
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version 1.162, 2003/07/24 11:31:21
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| /* |
/** @file |
| $Id$ |
Parser: request class decl. |
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Copyright (c) 2001-2003 ArtLebedev Group (http://www.artlebedev.com) |
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Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru) |
| */ |
*/ |
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|
| #ifndef PA_REQUEST_H |
#ifndef PA_REQUEST_H |
| #define PA_REQUEST_H |
#define PA_REQUEST_H |
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|
| #include "pa_pool.h" |
static const char* IDENT_REQUEST_H="$Date$"; |
| #include "pa_exception.h" |
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| #include "pa_hash.h" |
#include "pa_hash.h" |
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#include "pa_wcontext.h" |
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#include "pa_value.h" |
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#include "pa_stack.h" |
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#include "pa_request_info.h" |
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#include "pa_request_charsets.h" |
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#include "pa_sapi.h" |
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|
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#ifdef RESOURCES_DEBUG |
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#include <sys/resource.h> |
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#endif |
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// consts |
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| class Local_request_exception; |
const uint ANTI_ENDLESS_EXECUTE_RECOURSION=1000; |
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const size_t pseudo_file_no__process=1; |
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|
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// forwards |
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class Temp_lang; |
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class Methoded; |
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class VMethodFrame; |
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class GdomeDOMString_auto_ptr; |
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class VMail; |
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class VForm; |
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class VResponse; |
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class VCookie; |
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class VStateless_class; |
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|
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/// Main workhorse. |
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class Request: public PA_Object { |
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friend class Temp_lang; |
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friend class Temp_connection; |
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friend class Request_context_saver; |
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friend class Temp_request_self; |
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friend class Exception_trace; |
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|
| class Request { |
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| friend Local_request_exception; |
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| public: |
public: |
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class Trace { |
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const String* fname; |
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Operation::Origin forigin; |
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public: |
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Trace(): fname(0) {} |
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void clear() { fname=0; } |
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operator bool() const { return fname!=0; } |
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Trace(const String* aname, const Operation::Origin aorigin): |
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fname(aname), forigin(aorigin) {} |
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const String* name() const { return fname; } |
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const Operation::Origin origin() const { return forigin; } |
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}; |
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private: |
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union StackItem { |
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Value* fvalue; |
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ArrayOperation* fops; |
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VMethodFrame* fmethod_frame; |
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public: |
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Value& value() const { return *fvalue; } |
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const String& string() const { |
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const String* result=fvalue->get_string(); |
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assert(result); |
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return *result; |
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} |
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ArrayOperation& ops() const { return *fops; } |
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VMethodFrame& method_frame() const { return *fmethod_frame; } |
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|
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/// needed to fill unused Array entries |
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StackItem() {} |
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StackItem(Value& avalue): fvalue(&avalue) {} |
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StackItem(ArrayOperation& aops): fops(&aops) {} |
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StackItem(VMethodFrame& amethod_frame): fmethod_frame(&amethod_frame) {} |
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}; |
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class Exception_trace: public Stack<Trace> { |
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size_t fbottom; |
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public: |
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Exception_trace(): fbottom(0) {} |
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size_t bottom_index() { return fbottom; } |
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element_type bottom_value() { return get(bottom_index()); } |
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|
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void clear() { |
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ftop=fbottom=0; |
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} |
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|
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bool is_empty() { |
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return ftop==fbottom; |
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} |
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|
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const element_type extract_origin(const String*& problem_source); |
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}; |
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|
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///@{ core data |
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|
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/// classes |
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HashStringValue fclasses; |
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|
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/// already used files to avoid cyclic uses |
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Hash<const StringBody, bool> used_files; |
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/// list of all used files, Operation::file_no = index to it |
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Array<StringBody> file_list; |
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|
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/** endless execute(execute(... preventing counter |
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@see ANTI_ENDLESS_EXECUTE_RECOURSION |
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*/ |
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uint anti_endless_execute_recoursion; |
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///@} |
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|
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/// execution stack |
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Stack<StackItem> stack; |
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/// exception stack trace |
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Exception_trace exception_trace; |
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public: |
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|
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//@{ request processing status |
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/// contexts |
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VMethodFrame* method_frame; |
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Value* rcontext; |
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WContext* wcontext; |
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/// current language |
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String::Language flang; |
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/// current connection |
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SQL_Connection* fconnection; |
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//@} |
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/// interrupted flag, raised on signals [SIGPIPE] |
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bool finterrupted; |
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public: |
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size_t register_file(StringBody file_spec); |
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struct Exception_details { |
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const Trace trace; |
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const String* problem_source; |
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VHash& vhash; |
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Exception_details( |
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const Trace atrace, |
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const String* aproblem_source, |
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VHash& avhash): |
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trace(atrace), problem_source(aproblem_source), vhash(avhash) {} |
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}; |
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Exception_details get_details(const Exception& e); |
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/// @see Stack::wipe_unused |
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void wipe_unused_execution_stack() { |
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stack.wipe_unused(); |
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} |
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#ifdef RESOURCES_DEBUG |
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/// measures |
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double sql_connect_time; |
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double sql_request_time; |
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#endif |
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Request(SAPI_Info& asapi_info, Request_info& arequest_info, |
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String::Language adefault_lang, ///< all tainted data default untainting lang |
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bool status_allowed ///< status class allowed |
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); |
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~Request(); |
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/// global classes |
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HashStringValue& classes() { return fclasses; } |
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/** |
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core request processing |
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BEWARE: may throw exception to you: catch it! |
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*/ |
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void core( |
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const char* config_filespec, ///< system config filespec |
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bool config_fail_on_read_problem, ///< fail if system config file not found |
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bool header_only); |
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/// executes ops |
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void execute(ArrayOperation& ops); // execute.C |
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/// execute ops with anti-recoursion check |
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void recoursion_checked_execute(/*const String& name, */ArrayOperation& ops) { |
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// anti_endless_execute_recoursion |
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if(++anti_endless_execute_recoursion==ANTI_ENDLESS_EXECUTE_RECOURSION) { |
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anti_endless_execute_recoursion=0; // give @exception a chance |
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throw Exception("parser.runtime", |
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0, //&name, |
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"call canceled - endless recursion detected"); |
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} |
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execute(ops); // execute it |
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anti_endless_execute_recoursion--; |
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} |
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|
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/// compiles the file, maybe forcing it's class @a name and @a base_class. |
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void use_file(VStateless_class& aclass, |
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const String& file_name, |
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const String* main_alias=0, |
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bool ignore_class_path=false, |
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bool fail_on_read_problem=true, |
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bool fail_on_file_absence=true); // pa_request.C |
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/// compiles a @a source buffer |
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void use_buf(VStateless_class& aclass, |
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const char* source, |
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const String* main_alias, |
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uint file_no); // pa_request.C |
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|
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/// processes any code-junction there may be inside of @a value |
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StringOrValue process(Value& input_value, bool intercept_string=true); // execute.C |
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//@{ convinient helpers |
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const String& process_to_string(Value& input_value) { |
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return process(input_value, true/*intercept_string*/).as_string(); |
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} |
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Value& process_to_value(Value& input_value, bool intercept_string=true) { |
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return process(input_value, intercept_string).as_value(); |
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} |
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//@} |
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|
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| Request(Pool& apool) : |
#define DEFINE_DUAL(modification) \ |
| fpool(apool), |
void write_##modification##_lang(StringOrValue dual) { \ |
| fclasses(new(apool) Hash(apool)) { |
if(const String* string=dual.get_string()) \ |
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write_##modification##_lang(*string); \ |
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else \ |
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write_##modification##_lang(*dual.get_value()); \ |
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} |
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/// appending, sure of clean string inside |
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void write_no_lang(const String& astring) { |
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wcontext->write(astring, |
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(String::Language)(String::L_CLEAN | flang&String::L_OPTIMIZE_BIT)); |
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} |
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/// appending sure value, that would be converted to clean string |
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void write_no_lang(Value& avalue) { |
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if(wcontext->get_in_expression()) |
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wcontext->write(avalue); |
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else |
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wcontext->write(avalue, |
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(String::Language)(String::L_CLEAN | flang&String::L_OPTIMIZE_BIT)); |
| } |
} |
| ~Request() {} |
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| // IMPORTANT: don't use pool without Local_request_exception |
/// appending string, passing language built into string being written |
| Pool& pool() { return fpool; } |
void write_pass_lang(const String& astring) { |
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wcontext->write(astring, String::L_PASS_APPENDED); |
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} |
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/// appending possible string, passing language built into string being written |
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void write_pass_lang(Value& avalue) { |
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wcontext->write(avalue, String::L_PASS_APPENDED); |
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} |
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DEFINE_DUAL(pass) |
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/// appending possible string, assigning untaint language |
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void write_assign_lang(Value& avalue) { |
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wcontext->write(avalue, flang); |
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} |
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/// appending string, assigning untaint language |
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void write_assign_lang(const String& astring) { |
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wcontext->write(astring, flang); |
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} |
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DEFINE_DUAL(assign) |
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| Exception& exception() { return *fexception; } |
/// returns relative to @a path path to @a file |
| Hash& classes() { return *fclasses; } |
const String& relative(const char* apath, const String& relative_name); |
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| protected: |
/// returns an absolute @a path to relative @a name |
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const String& absolute(const String& relative_name); |
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| // all request' objects are allocated in this pool |
/// returns the mime type of 'user_file_name_cstr' |
| Pool& fpool; |
const String& mime_type_of(const char* user_file_name_cstr); |
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| // exception replacement mechanism is protected from direct usage |
/// returns current SQL connection if any |
| // Local_request_exception object enforces paired set/restore |
SQL_Connection* connection(bool fail_on_error=true) { |
| Exception *set_exception(Exception *e){ |
if(fail_on_error && !fconnection) |
| Exception *r=fexception; |
throw Exception("parser.runtime", |
| fexception=e; |
0, |
| return r; |
"outside of 'connect' operator"); |
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return fconnection; |
| } |
} |
| void restore_exception(Exception *e) { |
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| fexception=e; |
void set_interrupted(bool ainterrupted) { finterrupted=ainterrupted; } |
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bool get_interrupted() { return finterrupted; } |
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public: |
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/// info from web server |
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Request_info& request_info; |
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/// info about ServerAPI |
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SAPI_Info& sapi_info; |
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/// source, client, mail charsets |
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Request_charsets charsets; |
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/// 'MAIN' class conglomerat & operators are methods of this class |
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VStateless_class& main_class; |
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/// $form:elements |
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VForm& form; |
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/// $mail |
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VMail& mail; |
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/// $response:elements |
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VResponse& response; |
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/// $cookie:elements |
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VCookie& cookie; |
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/// classes configured data |
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HashStringObject classes_conf; |
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public: // status read methods |
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VMethodFrame *get_method_frame() { return method_frame; } |
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Value& get_self(); |
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#define GET_SELF(request, type) (static_cast<type &>(request.get_self())) |
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/* for strange reason call to this: |
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r.get_self<VHash>() |
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refuses to compile |
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template<typename T> T& get_self() { |
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return *static_cast<T*>(get_self().get()); |
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} |
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*/ |
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#ifdef XML |
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public: // charset helpers |
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/// @see Charset::transcode |
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GdomeDOMString_auto_ptr transcode(const String& s); |
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/// @see Charset::transcode |
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GdomeDOMString_auto_ptr transcode(const StringBody s); |
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/// @see Charset::transcode |
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const String& transcode(GdomeDOMString* s); |
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/// @see Charset::transcode |
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const String& transcode(xmlChar* s); |
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#endif |
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private: |
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/// already executed some @conf method |
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bool configure_admin_done; |
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void configure_admin(VStateless_class& conf_class); |
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private: // compile.C |
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VStateless_class& compile(VStateless_class* aclass, |
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const char* source, const String* main_alias, |
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uint file_no); |
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private: // execute.C |
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/// for @postprocess[body] |
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const String& execute_method(VMethodFrame& amethodFrame, const Method& method); |
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//{ for @conf[filespec] and @auto[filespec] |
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const String* execute_method(Value& aself, |
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const Method& method, VString* optional_param, |
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bool do_return_string); |
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struct Execute_nonvirtual_method_result { |
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const String* string; |
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Method* method; |
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Execute_nonvirtual_method_result(): string(0), method(0) {} |
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}; |
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Execute_nonvirtual_method_result execute_nonvirtual_method(VStateless_class& aclass, |
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const String& method_name, VString* optional_param, |
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bool do_return_string); |
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//} |
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/// for @main[] |
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const String* execute_virtual_method(Value& aself, const String& method_name); |
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Value& get_element(Value& ncontext, const String& name, bool can_call_operator); |
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|
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private: // defaults |
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const String::Language fdefault_lang; |
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private: // mime types |
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/// $MAIN:MIME-TYPES |
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Table *mime_types; |
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private: // lang manipulation |
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String::Language set_lang(String::Language alang) { |
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String::Language result=flang; |
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flang=alang; |
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return result; |
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} |
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void restore_lang(String::Language alang) { |
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flang=alang; |
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} |
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private: // connection manipulation |
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SQL_Connection* set_connection(SQL_Connection* aconnection) { |
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SQL_Connection* result=fconnection; |
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fconnection=aconnection; |
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return result; |
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} |
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void restore_connection(SQL_Connection* aconnection) { |
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fconnection=aconnection; |
| } |
} |
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| private: |
private: |
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|
| // current request's exception object |
void output_result(VFile* body_file, bool header_only, bool as_attachment); |
| Exception *fexception; |
}; |
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|
| // defined classes |
/// Auto-object used to save request context across ^try body |
| Hash *fclasses; |
class Request_context_saver { |
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Request& fr; |
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|
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/// exception stack trace |
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size_t exception_trace; |
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/// execution stack |
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size_t stack; |
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/// contexts |
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VMethodFrame* method_frame; |
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Value* rcontext; |
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WContext* wcontext; |
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/// current language |
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String::Language flang; |
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/// current connection |
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SQL_Connection* fconnection; |
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|
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public: |
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Request_context_saver(Request& ar) : |
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exception_trace(ar.exception_trace.top()), |
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stack(ar.stack.top()), |
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method_frame(ar.method_frame), |
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rcontext(ar.rcontext), |
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wcontext(ar.wcontext), |
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flang(ar.flang), |
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fconnection(ar.fconnection), |
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fr(ar) {} |
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void restore() { |
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fr.exception_trace.top(exception_trace); |
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fr.stack.top(stack); |
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fr.method_frame=method_frame, fr.rcontext=rcontext; fr.wcontext=wcontext; |
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fr.flang=flang; |
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fr.fconnection=fconnection; |
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} |
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}; |
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|
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/// Auto-object used for temporary changing Request::flang. |
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class Temp_lang { |
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Request& frequest; |
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String::Language saved_lang; |
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public: |
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Temp_lang(Request& arequest, String::Language alang) : |
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frequest(arequest), |
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saved_lang(arequest.set_lang(alang)) { |
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} |
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~Temp_lang() { |
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frequest.restore_lang(saved_lang); |
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} |
| }; |
}; |
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|
| class Local_request_exception { |
/// Auto-object used for temporary changing Request::fconnection. |
| Request request; |
class Temp_connection { |
| Exception *saved_exception; |
Request& frequest; |
| public: |
SQL_Connection* saved_connection; |
| Local_request_exception(Request& arequest, Exception& exception) : |
public: |
| request(arequest), |
Temp_connection(Request& arequest, SQL_Connection* aconnection) : |
| saved_exception(arequest.set_exception(&exception)) {} |
frequest(arequest), |
| ~Local_request_exception() { request.restore_exception(saved_exception); } |
saved_connection(arequest.set_connection(aconnection)) { |
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} |
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~Temp_connection() { |
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frequest.restore_connection(saved_connection); |
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} |
| }; |
}; |
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|
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|
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// defines for externs |
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|
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#define CONTENT_DISPOSITION_NAME "content-disposition" |
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#define CONTENT_DISPOSITION_VALUE "attachment" |
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#define CONTENT_DISPOSITION_FILENAME_NAME "filename" |
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|
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// externs |
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|
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extern const String main_method_name; |
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extern const String auto_method_name; |
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extern const String body_name; |
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extern const String content_disposition_name; |
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extern const String content_disposition_value; |
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extern const String content_disposition_filename_name; |
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|
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extern const String exception_type_part_name; |
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extern const String exception_source_part_name; |
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extern const String exception_comment_part_name; |
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extern const String exception_handled_part_name; |
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|
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// defines for statics |
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|
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#define MAIN_CLASS_NAME "MAIN" |
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#define AUTO_FILE_NAME "auto.p" |
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|
| #endif |
#endif |