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version 1.7, 2001/02/21 17:36:30
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version 1.240, 2016/11/11 00:02:59
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| /* |
/** @file |
| $Id$ |
Parser: request class decl. |
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Copyright (c) 2001-2015 Art. Lebedev Studio (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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|
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#define IDENT_PA_REQUEST_H "$Id$" |
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|
| #include "pa_pool.h" |
#include "pa_pool.h" |
| #include "pa_exception.h" |
|
| #include "pa_hash.h" |
#include "pa_hash.h" |
| #include "pa_wcontext.h" |
#include "pa_wcontext.h" |
| #include "pa_value.h" |
#include "pa_value.h" |
| #include "pa_stack.h" |
#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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// consts |
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|
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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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|
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class Temp_lang; |
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class Methoded; |
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class VMethodFrame; |
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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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class VConsole; |
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|
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extern int pa_execute_recoursion_limit; |
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extern int pa_loop_limit; |
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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 Temp_request_self; |
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friend class Temp_value_element; |
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friend class Request_context_saver; |
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friend class Exception_trace; |
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|
| #define MAIN_METHOD_NAME "main" |
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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|
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Trace(const String* aname, const Operation::Origin aorigin): |
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fname(aname), forigin(aorigin) {} |
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|
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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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|
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enum Skip { |
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SKIP_NOTHING, |
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SKIP_BREAK, |
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SKIP_CONTINUE |
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}; |
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|
| #ifndef NO_STRING_ORIGIN |
private: |
| # define COMPILE_PARAMS char *source, char *file |
Pool fpool; |
| # define COMPILE(source, file) real_compile(source, file) |
public: |
| #else |
Pool& pool() { return fpool; } |
| # define COMPILE_PARAMS char *source |
|
| # define COMPILE(source, file) real_compile(source) |
private: |
| #endif |
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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return fvalue->as_string(); |
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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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|
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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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|
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size_t bottom_index() { return fbottom; } |
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void set_bottom_index(size_t abottom) { fbottom=abottom; } |
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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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fused=fbottom=0; |
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} |
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|
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bool is_empty() { |
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return fused==fbottom; |
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} |
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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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HashString<VStateless_class*> fclasses; |
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|
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/// already used files to avoid cyclic uses |
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HashString<bool> used_files; |
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HashString<bool> searched_along_class_path; |
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/// list of all used files, Operation::file_no = index to it |
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Array<String::Body> file_list; |
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|
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/// endless execute(execute(... preventing counter |
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uint anti_endless_execute_recoursion; |
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|
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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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|
| class Local_request_exception; |
/// exception stack trace |
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Exception_trace exception_trace; |
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public: |
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|
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bool allow_class_replace; |
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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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Skip fskip; |
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int fin_cycle; |
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|
| class Request : public Pooled { |
|
| friend Local_request_exception; |
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| public: |
public: |
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uint register_file(String::Body file_spec); |
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|
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struct Exception_details { |
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const Operation::Origin origin; |
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const String* problem_source; |
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VHash& vhash; |
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Exception_details(const Operation::Origin aorigin, const String* aproblem_source, VHash& avhash): origin(aorigin), 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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const char* get_exception_cstr(const Exception& e, Exception_details& details); |
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|
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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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|
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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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|
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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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); |
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~Request(); |
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|
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/// global classes |
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HashString<VStateless_class*>& classes() { return fclasses; } |
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VStateless_class* get_class(const String& name); |
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void put_class(VStateless_class *aclass){ classes().put(aclass->type(), aclass); } |
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|
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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(const char* config_filespec, bool config_fail_on_read_problem, bool header_only); |
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|
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/// executes ops |
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void execute(ArrayOperation& ops); // execute.C |
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|
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template<typename Frame> void call(Frame& frame){ |
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VMethodFrame *saved_method_frame=method_frame; |
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Value* saved_rcontext=rcontext; |
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WContext *saved_wcontext=wcontext; |
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|
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rcontext=wcontext=method_frame=&frame; |
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|
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frame.call(*this); |
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|
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wcontext=saved_wcontext; |
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rcontext=saved_rcontext; |
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method_frame=saved_method_frame; |
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} |
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|
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template<typename Frame> void call_write(Frame& frame){ |
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VMethodFrame *saved_method_frame=method_frame; |
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Value* saved_rcontext=rcontext; |
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|
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rcontext=method_frame=&frame; |
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|
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frame.call(*this); |
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rcontext=saved_rcontext; |
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method_frame=saved_method_frame; |
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} |
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|
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Value& construct(VStateless_class &class_value, const Method &method); |
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|
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/// execute ops with anti-recoursion check |
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void recoursion_checked_execute(ArrayOperation& ops) { |
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if(++anti_endless_execute_recoursion==pa_execute_recoursion_limit) { |
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anti_endless_execute_recoursion=0; // give @exception a chance |
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throw Exception(PARSER_RUNTIME, 0, "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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/// |
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void use_file_directly(VStateless_class& aclass, const String& file_spec, bool fail_on_read_problem=true, bool fail_on_file_absence=true); |
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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, const String& file_name, const String* use_filespec); |
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void use_file(VStateless_class& aclass, const String& file_name, const String* use_filespec, Operation::Origin origin); |
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|
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/// compiles a @a source buffer |
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void use_buf(VStateless_class& aclass, const char* source, const String* main_alias, uint file_no, int line_no_offset=0); |
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|
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/// processes any code-junction there may be inside of @a value |
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Value& process_getter(Junction& junction); // execute.C |
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Value& process(Value& input_value); // execute.C |
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void process_write(Value& input_value); // execute.C |
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|
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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).as_string(); |
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} |
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//@} |
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const String* get_method_filename(const Method* method); // execute.C |
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const String* get_used_filename(uint file_no); |
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|
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/// appending string with it's languages |
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inline void write(const String& astring) { |
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wcontext->write(astring); |
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} |
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| Request(Pool& apool) : Pooled(apool), |
/// in [] and {} appending string if get_string is not null, else appending value |
| fpool(apool), |
/// in () appending string if is_string, else appending value |
| stack(apool), |
inline void write(Value& avalue) { |
| fclasses(apool) |
wcontext->write_as_string(avalue); |
| { |
|
| } |
} |
| ~Request() {} |
|
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|
| // IMPORTANT: don't use without Local_request_exception |
/// allways appending value |
| Exception& exception() { return *fexception; } |
inline void write_value(Value& avalue) { |
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wcontext->write(avalue); |
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} |
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|
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/// returns relative to @a path path to @a file |
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const String& relative(const char* apath, const String& relative_name); |
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|
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/// returns an absolute @a path to relative @a name |
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const String& absolute(const String& relative_name); |
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|
| // global classes |
/// returns the mime type of 'user_file_name' |
| Hash& classes() { return fclasses; } |
const String& mime_type_of(const String* file_name); |
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|
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/// returns the mime type of 'user_file_name_cstr' |
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const String& mime_type_of(const char* user_file_name_cstr); |
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|
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/// returns current SQL connection if any |
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SQL_Connection* connection(bool fail_on_error=true) { |
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if(fail_on_error && !fconnection) |
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throw Exception(PARSER_RUNTIME, 0, "outside of 'connect' operator"); |
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return fconnection; |
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} |
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|
| // core request processing |
void set_interrupted(bool ainterrupted) { finterrupted=ainterrupted; } |
| void core(); |
bool get_interrupted() { return finterrupted; } |
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|
| private: // core data |
void set_skip(Skip askip) { fskip=askip; } |
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Skip get_skip() { return fskip; } |
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|
| // classes |
void set_in_cycle(int adelta) { fin_cycle+=adelta; } |
| Hash fclasses; |
bool get_in_cycle() { return fin_cycle>0; } |
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|
| // contexts |
public: |
| Value *root, *self, *rcontext; |
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| WContext *wcontext; |
|
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|
| // execution stack |
/// info from web server |
| Stack stack; |
Request_info& request_info; |
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|
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/// info about ServerAPI |
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SAPI_Info& sapi_info; |
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|
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/// source, client, mail charsets |
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Request_charsets charsets; |
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|
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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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/// $console |
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VConsole& console; |
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|
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/// classes configured data |
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HashString<void*> classes_conf; |
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|
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public: // status read methods |
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|
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VMethodFrame *get_method_frame() { return method_frame; } |
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Value& get_self(); |
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|
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#define GET_SELF(request, type) (static_cast<type &>(request.get_self())) |
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|
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/// public for ^reflection:copy[] |
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void put_element(Value& ncontext, const String& name, Value* value); |
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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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|
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//{ for @conf[filespec] and @auto[filespec] and parser://method/call |
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const String* execute_method(Value& aself, const Method& method, Value* optional_param, bool do_return_string); |
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|
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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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|
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Execute_nonvirtual_method_result execute_nonvirtual_method(VStateless_class& aclass, const String& method_name, VString* optional_param, bool do_return_string); |
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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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|
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/// @see Charset::transcode |
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xmlChar* transcode(const String& s); |
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/// @see Charset::transcode |
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xmlChar* transcode(const String::Body s); |
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/// @see Charset::transcode |
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const String& transcode(const xmlChar* s); |
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|
| private: // core.C |
#endif |
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private: |
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|
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/// already executed some @conf method |
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bool configure_admin_done; |
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|
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void configure_admin(VStateless_class& conf_class); |
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|
| Array& load_and_compile_RUN(); |
void configure(); |
| VClass *construct_class(String& name, Array& compiled_methods); |
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| char *execute_MAIN(VClass *class_RUN); |
|
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|
| private: // compile.C |
private: // compile.C |
| |
|
| Array& real_compile(COMPILE_PARAMS); |
ArrayClass& compile(VStateless_class* aclass, const char* source, const String* main_alias, uint file_no, int line_no_offset); |
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|
| private: // execute.C |
private: // execute.C |
| |
|
| void execute(Array& ops); |
Value& get_element(Value& ncontext, const String& name); |
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#ifdef FEATURE_GET_ELEMENT4CALL |
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Value& get_element4call(Value& ncontext, const String& name); |
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#endif |
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|
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private: // defaults |
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|
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const String::Language fdefault_lang; |
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|
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private: // mime types |
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|
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/// $MAIN:MIME-TYPES |
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Table *mime_types; |
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|
| protected: |
private: // lang manipulation |
| |
|
| // all request' objects are allocated in this pool |
String::Language set_lang(String::Language alang) { |
| Pool& fpool; |
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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|
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private: // connection manipulation |
| |
|
| // exception replacement mechanism is protected from direct usage |
SQL_Connection* set_connection(SQL_Connection* aconnection) { |
| // Local_request_exception object enforces paired set/restore |
SQL_Connection* result=fconnection; |
| Exception *set_exception(Exception *e){ |
fconnection=aconnection; |
| Exception *r=fexception; |
return result; |
| fexception=e; |
|
| return r; |
|
| } |
} |
| void restore_exception(Exception *e) { |
void restore_connection(SQL_Connection* aconnection) { |
| fexception=e; |
fconnection=aconnection; |
| } |
} |
| |
|
| private: |
private: |
| |
|
| // current request's exception object |
void output_result(VFile* body_file, bool header_only, bool as_attachment); |
| Exception *fexception; |
}; |
| |
|
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/// Auto-object used to save request context across ^try body |
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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_top; |
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size_t exception_trace_bottom; |
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/// execution stack |
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size_t stack; |
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uint anti_endless_execute_recoursion; |
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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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fr(ar), |
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exception_trace_top(ar.exception_trace.top_index()), |
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exception_trace_bottom(ar.exception_trace.bottom_index()), |
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stack(ar.stack.top_index()), |
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anti_endless_execute_recoursion(ar.anti_endless_execute_recoursion), |
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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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void restore() { |
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fr.exception_trace.set_top_index(exception_trace_top); |
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fr.exception_trace.set_bottom_index(exception_trace_bottom); |
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fr.stack.set_top_index(stack); |
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fr.anti_endless_execute_recoursion=anti_endless_execute_recoursion; |
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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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} |
| }; |
}; |
| |
|
| class Local_request_exception { |
/// Auto-object used for temporary changing Request::fconnection. |
| Request request; |
class Temp_connection { |
| Exception *saved_exception; |
Request& frequest; |
| |
SQL_Connection* saved_connection; |
| public: |
public: |
| Local_request_exception(Request& arequest, Exception& exception) : |
Temp_connection(Request& arequest, SQL_Connection* aconnection) : |
| request(arequest), |
frequest(arequest), |
| saved_exception(arequest.set_exception(&exception)) {} |
saved_connection(arequest.set_connection(aconnection)) { |
| ~Local_request_exception() { request.restore_exception(saved_exception); } |
} |
| |
~Temp_connection() { |
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frequest.restore_connection(saved_connection); |
| |
} |
| }; |
}; |
| |
|
| // core func |
/// Auto-object used for break out of cycle check |
| void core(); |
class InCycle { |
| |
Request& frequest; |
| |
public: |
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InCycle(Request& arequest) : frequest(arequest) { |
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frequest.set_in_cycle(1); |
| |
} |
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~InCycle() { |
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frequest.set_in_cycle(-1); |
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} |
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}; |
| |
|
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/// Auto-object used for temporary changing Request::allow_class_replace. |
| |
class Temp_class_replace { |
| |
Request& frequest; |
| |
public: |
| |
Temp_class_replace(Request& arequest, bool avalue) : frequest(arequest){ |
| |
frequest.allow_class_replace=avalue; |
| |
} |
| |
~Temp_class_replace() { |
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frequest.allow_class_replace=false; |
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} |
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}; |
| |
|
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/// Auto-object used for temporarily substituting/removing elements |
| |
class Temp_value_element { |
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Request& frequest; |
| |
Value& fwhere; |
| |
const String& fname; |
| |
Value* saved; |
| |
public: |
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Temp_value_element(Request& arequest, Value& awhere, const String& aname, Value* awhat); |
| |
~Temp_value_element(); |
| |
}; |
| |
|
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// defines for externs |
| |
|
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#define EXCEPTION_HANDLED_PART_NAME "handled" |
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|
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|
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// externs |
| |
|
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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 exception_type_part_name; |
| |
extern const String exception_source_part_name; |
| |
extern const String exception_comment_part_name; |
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extern const String exception_handled_part_name; |
| |
|
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// defines for statics |
| |
|
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#define MAIN_CLASS_NAME "MAIN" |
| |
#define AUTO_FILE_NAME "auto.p" |
| |
|
| #endif |
#endif |