Annotation of parser3/src/include/pa_request.h, revision 1.175
1.61 paf 1: /** @file
1.62 paf 2: Parser: request class decl.
3:
1.174 paf 4: Copyright (c) 2001-2004 ArtLebedev Group (http://www.artlebedev.com)
1.121 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.1 paf 6: */
7:
8: #ifndef PA_REQUEST_H
9: #define PA_REQUEST_H
1.141 paf 10:
1.175 ! paf 11: static const char * const IDENT_REQUEST_H="$Date: 2004/02/11 15:33:14 $";
1.1 paf 12:
1.168 paf 13: #include "pa_pool.h"
1.5 paf 14: #include "pa_hash.h"
1.7 paf 15: #include "pa_wcontext.h"
1.6 paf 16: #include "pa_value.h"
1.7 paf 17: #include "pa_stack.h"
1.162 paf 18: #include "pa_request_info.h"
19: #include "pa_request_charsets.h"
20: #include "pa_sapi.h"
1.44 paf 21:
1.112 paf 22: #ifdef RESOURCES_DEBUG
23: #include <sys/resource.h>
24: #endif
25:
1.128 paf 26: // consts
27:
1.161 paf 28: const uint ANTI_ENDLESS_EXECUTE_RECOURSION=1000;
1.162 paf 29: const size_t pseudo_file_no__process=1;
1.128 paf 30:
1.162 paf 31: // forwards
1.4 paf 32:
1.39 paf 33: class Temp_lang;
1.84 paf 34: class Methoded;
1.116 paf 35: class VMethodFrame;
1.162 paf 36: class GdomeDOMString_auto_ptr;
37: class VMail;
38: class VForm;
39: class VResponse;
40: class VCookie;
41: class VStateless_class;
1.1 paf 42:
1.61 paf 43: /// Main workhorse.
1.162 paf 44: class Request: public PA_Object {
1.107 paf 45: friend class Temp_lang;
1.117 paf 46: friend class Temp_connection;
1.148 paf 47: friend class Request_context_saver;
1.155 paf 48: friend class Temp_request_self;
1.162 paf 49: friend class Exception_trace;
50:
1.1 paf 51: public:
1.162 paf 52: class Trace {
53: const String* fname;
54: Operation::Origin forigin;
55: public:
56: Trace(): fname(0) {}
57: void clear() { fname=0; }
58: operator bool() const { return fname!=0; }
59:
60: Trace(const String* aname, const Operation::Origin aorigin):
61: fname(aname), forigin(aorigin) {}
62:
63: const String* name() const { return fname; }
64: const Operation::Origin origin() const { return forigin; }
65: };
66:
1.168 paf 67: private:
68: Pool fpool;
69: public:
70: Pool& pool() { return fpool; }
1.162 paf 71:
72: private:
73: union StackItem {
74: Value* fvalue;
75: ArrayOperation* fops;
76: VMethodFrame* fmethod_frame;
77: public:
78: Value& value() const { return *fvalue; }
79: const String& string() const {
1.167 paf 80: return fvalue->as_string();
1.162 paf 81: }
82: ArrayOperation& ops() const { return *fops; }
83: VMethodFrame& method_frame() const { return *fmethod_frame; }
84:
85: /// needed to fill unused Array entries
86: StackItem() {}
87: StackItem(Value& avalue): fvalue(&avalue) {}
88: StackItem(ArrayOperation& aops): fops(&aops) {}
89: StackItem(VMethodFrame& amethod_frame): fmethod_frame(&amethod_frame) {}
90: };
91:
92: class Exception_trace: public Stack<Trace> {
93: size_t fbottom;
94: public:
95: Exception_trace(): fbottom(0) {}
96:
97: size_t bottom_index() { return fbottom; }
1.165 paf 98: void set_bottom_index(size_t abottom) { fbottom=abottom; }
1.162 paf 99: element_type bottom_value() { return get(bottom_index()); }
100:
101: void clear() {
102: ftop=fbottom=0;
103: }
104:
105: bool is_empty() {
106: return ftop==fbottom;
107: }
108:
109: const element_type extract_origin(const String*& problem_source);
110: };
111:
112: ///@{ core data
113:
114: /// classes
115: HashStringValue fclasses;
116:
117: /// already used files to avoid cyclic uses
1.163 paf 118: Hash<const String::Body, bool> used_files;
1.162 paf 119: /// list of all used files, Operation::file_no = index to it
1.163 paf 120: Array<String::Body> file_list;
1.162 paf 121:
122: /** endless execute(execute(... preventing counter
123: @see ANTI_ENDLESS_EXECUTE_RECOURSION
124: */
125: uint anti_endless_execute_recoursion;
126:
127: ///@}
128:
129: /// execution stack
130: Stack<StackItem> stack;
131:
132: /// exception stack trace
133: Exception_trace exception_trace;
134: public:
135:
136: //@{ request processing status
137: /// contexts
138: VMethodFrame* method_frame;
139: Value* rcontext;
140: WContext* wcontext;
141: /// current language
142: String::Language flang;
143: /// current connection
144: SQL_Connection* fconnection;
145: //@}
146: /// interrupted flag, raised on signals [SIGPIPE]
147: bool finterrupted;
148:
149: public:
1.175 ! paf 150: uint register_file(String::Body file_spec);
1.162 paf 151:
152: struct Exception_details {
153: const Trace trace;
154: const String* problem_source;
155: VHash& vhash;
156:
157: Exception_details(
158: const Trace atrace,
159: const String* aproblem_source,
1.166 paf 160: VHash& avhash): trace(atrace), problem_source(aproblem_source), vhash(avhash) {}
1.162 paf 161: };
162: Exception_details get_details(const Exception& e);
163:
164: /// @see Stack::wipe_unused
165: void wipe_unused_execution_stack() {
166: stack.wipe_unused();
167: }
1.112 paf 168:
169: #ifdef RESOURCES_DEBUG
170: /// measures
171: double sql_connect_time;
172: double sql_request_time;
173: #endif
1.61 paf 174:
1.162 paf 175: Request(SAPI_Info& asapi_info, Request_info& arequest_info,
176: String::Language adefault_lang, ///< all tainted data default untainting lang
1.110 paf 177: bool status_allowed ///< status class allowed
1.50 paf 178: );
1.118 paf 179: ~Request();
1.1 paf 180:
1.61 paf 181: /// global classes
1.162 paf 182: HashStringValue& classes() { return fclasses; }
1.6 paf 183:
1.65 paf 184: /**
185: core request processing
186:
187: BEWARE: may throw exception to you: catch it!
188: */
189: void core(
1.162 paf 190: const char* config_filespec, ///< system config filespec
1.138 paf 191: bool config_fail_on_read_problem, ///< fail if system config file not found
1.65 paf 192: bool header_only);
1.17 paf 193:
1.61 paf 194: /// executes ops
1.162 paf 195: void execute(ArrayOperation& ops); // execute.C
1.127 paf 196: /// execute ops with anti-recoursion check
1.162 paf 197: void recoursion_checked_execute(/*const String& name, */ArrayOperation& ops) {
1.128 paf 198: // anti_endless_execute_recoursion
199: if(++anti_endless_execute_recoursion==ANTI_ENDLESS_EXECUTE_RECOURSION) {
200: anti_endless_execute_recoursion=0; // give @exception a chance
201: throw Exception("parser.runtime",
1.162 paf 202: 0, //&name,
1.128 paf 203: "call canceled - endless recursion detected");
204: }
1.147 paf 205: execute(ops); // execute it
1.128 paf 206: anti_endless_execute_recoursion--;
207: }
1.40 paf 208:
1.64 paf 209: /// compiles the file, maybe forcing it's class @a name and @a base_class.
1.162 paf 210: void use_file(VStateless_class& aclass,
1.94 parser 211: const String& file_name,
1.162 paf 212: const String* main_alias=0,
1.149 paf 213: bool ignore_class_path=false,
1.162 paf 214: bool fail_on_read_problem=true,
215: bool fail_on_file_absence=true); // pa_request.C
1.64 paf 216: /// compiles a @a source buffer
1.162 paf 217: void use_buf(VStateless_class& aclass,
218: const char* source,
219: const String* main_alias,
1.175 ! paf 220: uint file_no,
! 221: int line_no_offset=0); // pa_request.C
1.28 paf 222:
1.129 paf 223: /// processes any code-junction there may be inside of @a value
1.131 paf 224: StringOrValue process(Value& input_value, bool intercept_string=true); // execute.C
1.129 paf 225: //@{ convinient helpers
226: const String& process_to_string(Value& input_value) {
227: return process(input_value, true/*intercept_string*/).as_string();
228: }
229: Value& process_to_value(Value& input_value, bool intercept_string=true) {
230: return process(input_value, intercept_string).as_value();
1.126 paf 231: }
232: //@}
1.131 paf 233:
1.126 paf 234:
1.131 paf 235: #define DEFINE_DUAL(modification) \
236: void write_##modification##_lang(StringOrValue dual) { \
1.162 paf 237: if(const String* string=dual.get_string()) \
1.131 paf 238: write_##modification##_lang(*string); \
239: else \
240: write_##modification##_lang(*dual.get_value()); \
241: }
242:
1.61 paf 243: /// appending, sure of clean string inside
1.65 paf 244: void write_no_lang(const String& astring) {
1.111 paf 245: wcontext->write(astring,
1.162 paf 246: (String::Language)(String::L_CLEAN | flang&String::L_OPTIMIZE_BIT));
1.49 paf 247: }
1.131 paf 248: /// appending sure value, that would be converted to clean string
249: void write_no_lang(Value& avalue) {
250: if(wcontext->get_in_expression())
251: wcontext->write(avalue);
252: else
253: wcontext->write(avalue,
1.162 paf 254: (String::Language)(String::L_CLEAN | flang&String::L_OPTIMIZE_BIT));
1.131 paf 255: }
256:
1.61 paf 257: /// appending string, passing language built into string being written
1.65 paf 258: void write_pass_lang(const String& astring) {
1.162 paf 259: wcontext->write(astring, String::L_PASS_APPENDED);
1.59 paf 260: }
1.131 paf 261: /// appending possible string, passing language built into string being written
262: void write_pass_lang(Value& avalue) {
1.162 paf 263: wcontext->write(avalue, String::L_PASS_APPENDED);
1.131 paf 264: }
265: DEFINE_DUAL(pass)
266:
1.61 paf 267: /// appending possible string, assigning untaint language
1.40 paf 268: void write_assign_lang(Value& avalue) {
1.39 paf 269: wcontext->write(avalue, flang);
1.106 parser 270: }
271: /// appending string, assigning untaint language
272: void write_assign_lang(const String& astring) {
273: wcontext->write(astring, flang);
1.22 paf 274: }
1.131 paf 275: DEFINE_DUAL(assign)
1.22 paf 276:
1.64 paf 277: /// returns relative to @a path path to @a file
1.162 paf 278: const String& relative(const char* apath, const String& relative_name);
1.61 paf 279:
1.64 paf 280: /// returns an absolute @a path to relative @a name
1.69 paf 281: const String& absolute(const String& relative_name);
1.42 paf 282:
1.80 paf 283: /// returns the mime type of 'user_file_name_cstr'
1.162 paf 284: const String& mime_type_of(const char* user_file_name_cstr);
1.80 paf 285:
1.117 paf 286: /// returns current SQL connection if any
1.162 paf 287: SQL_Connection* connection(bool fail_on_error=true) {
288: if(fail_on_error && !fconnection)
1.125 paf 289: throw Exception("parser.runtime",
1.162 paf 290: 0,
1.117 paf 291: "outside of 'connect' operator");
292:
293: return fconnection;
1.133 paf 294: }
295:
1.162 paf 296: void set_interrupted(bool ainterrupted) { finterrupted=ainterrupted; }
297: bool get_interrupted() { return finterrupted; }
1.158 paf 298:
1.17 paf 299: public:
1.22 paf 300:
1.61 paf 301: /// info from web server
1.162 paf 302: Request_info& request_info;
303:
304: /// info about ServerAPI
305: SAPI_Info& sapi_info;
306:
307: /// source, client, mail charsets
308: Request_charsets charsets;
1.53 paf 309:
1.154 paf 310: /// 'MAIN' class conglomerat & operators are methods of this class
1.162 paf 311: VStateless_class& main_class;
1.86 paf 312: /// $form:elements
1.162 paf 313: VForm& form;
1.140 paf 314: /// $mail
1.162 paf 315: VMail& mail;
1.86 paf 316: /// $response:elements
1.162 paf 317: VResponse& response;
1.86 paf 318: /// $cookie:elements
1.162 paf 319: VCookie& cookie;
1.70 paf 320:
1.148 paf 321: /// classes configured data
1.169 paf 322: Hash<const String::Body, void*> classes_conf;
1.85 paf 323:
1.148 paf 324: public: // status read methods
1.76 paf 325:
1.148 paf 326: VMethodFrame *get_method_frame() { return method_frame; }
1.162 paf 327: Value& get_self();
328: #define GET_SELF(request, type) (static_cast<type &>(request.get_self()))
329: /* for strange reason call to this:
330: r.get_self<VHash>()
331: refuses to compile
1.87 paf 332:
1.162 paf 333: template<typename T> T& get_self() {
334: return *static_cast<T*>(get_self().get());
335: }
336: */
1.6 paf 337:
1.173 paf 338: /// for @main[]
339: const String* execute_virtual_method(Value& aself, const String& method_name);
340:
341: /// for @postprocess[body]
342: StringOrValue execute_method(VMethodFrame& amethodFrame, const Method& method);
343: //{ for @conf[filespec] and @auto[filespec] and parser://method/call
344: const String* execute_method(Value& aself,
345: const Method& method, VString* optional_param,
346: bool do_return_string);
347: struct Execute_nonvirtual_method_result {
348: const String* string;
349: Method* method;
350: Execute_nonvirtual_method_result(): string(0), method(0) {}
351: };
352: Execute_nonvirtual_method_result execute_nonvirtual_method(VStateless_class& aclass,
353: const String& method_name, VString* optional_param,
354: bool do_return_string);
355: //}
356:
1.162 paf 357: #ifdef XML
358: public: // charset helpers
1.67 paf 359:
1.162 paf 360: /// @see Charset::transcode
361: GdomeDOMString_auto_ptr transcode(const String& s);
362: /// @see Charset::transcode
1.163 paf 363: GdomeDOMString_auto_ptr transcode(const String::Body s);
1.162 paf 364: /// @see Charset::transcode
365: const String& transcode(GdomeDOMString* s);
366: /// @see Charset::transcode
367: const String& transcode(xmlChar* s);
1.89 parser 368:
1.162 paf 369: #endif
1.136 paf 370:
371: private:
372:
373: /// already executed some @conf method
374: bool configure_admin_done;
375:
1.162 paf 376: void configure_admin(VStateless_class& conf_class);
1.99 parser 377:
1.7 paf 378: private: // compile.C
379:
1.162 paf 380: VStateless_class& compile(VStateless_class* aclass,
381: const char* source, const String* main_alias,
1.175 ! paf 382: uint file_no,
! 383: int line_no_offset);
1.7 paf 384:
385: private: // execute.C
1.9 paf 386:
1.162 paf 387: Value& get_element(Value& ncontext, const String& name, bool can_call_operator);
1.22 paf 388:
1.58 paf 389: private: // defaults
390:
1.162 paf 391: const String::Language fdefault_lang;
1.80 paf 392:
393: private: // mime types
394:
395: /// $MAIN:MIME-TYPES
396: Table *mime_types;
1.22 paf 397:
1.39 paf 398: private: // lang manipulation
1.22 paf 399:
1.162 paf 400: String::Language set_lang(String::Language alang) {
401: String::Language result=flang;
1.39 paf 402: flang=alang;
403: return result;
404: }
1.162 paf 405: void restore_lang(String::Language alang) {
1.39 paf 406: flang=alang;
407: }
408:
1.117 paf 409: private: // connection manipulation
410:
1.162 paf 411: SQL_Connection* set_connection(SQL_Connection* aconnection) {
412: SQL_Connection* result=fconnection;
1.117 paf 413: fconnection=aconnection;
414: return result;
415: }
1.162 paf 416: void restore_connection(SQL_Connection* aconnection) {
1.117 paf 417: fconnection=aconnection;
418: }
419:
420: private:
421:
1.162 paf 422: void output_result(VFile* body_file, bool header_only, bool as_attachment);
1.148 paf 423: };
424:
425: /// Auto-object used to save request context across ^try body
426: class Request_context_saver {
427: Request& fr;
428:
429: /// exception stack trace
1.165 paf 430: size_t exception_trace_top;
431: size_t exception_trace_bottom;
1.148 paf 432: /// execution stack
1.162 paf 433: size_t stack;
1.166 paf 434: uint anti_endless_execute_recoursion;
1.148 paf 435: /// contexts
1.162 paf 436: VMethodFrame* method_frame;
437: Value* rcontext;
438: WContext* wcontext;
1.148 paf 439: /// current language
1.162 paf 440: String::Language flang;
1.148 paf 441: /// current connection
1.162 paf 442: SQL_Connection* fconnection;
1.126 paf 443:
1.148 paf 444: public:
445: Request_context_saver(Request& ar) :
1.171 paf 446: fr(ar),
1.165 paf 447: exception_trace_top(ar.exception_trace.top_index()),
448: exception_trace_bottom(ar.exception_trace.bottom_index()),
449: stack(ar.stack.top_index()),
1.166 paf 450: anti_endless_execute_recoursion(ar.anti_endless_execute_recoursion),
1.148 paf 451: method_frame(ar.method_frame),
452: rcontext(ar.rcontext),
453: wcontext(ar.wcontext),
454: flang(ar.flang),
1.171 paf 455: fconnection(ar.fconnection) {}
1.153 paf 456: void restore() {
1.165 paf 457: fr.exception_trace.set_top_index(exception_trace_top);
458: fr.exception_trace.set_bottom_index(exception_trace_bottom);
459: fr.stack.set_top_index(stack);
1.166 paf 460: fr.anti_endless_execute_recoursion=anti_endless_execute_recoursion;
1.157 paf 461: fr.method_frame=method_frame, fr.rcontext=rcontext; fr.wcontext=wcontext;
1.148 paf 462: fr.flang=flang;
463: fr.fconnection=fconnection;
464: }
1.39 paf 465: };
466:
1.61 paf 467: /// Auto-object used for temporary changing Request::flang.
1.39 paf 468: class Temp_lang {
469: Request& frequest;
1.162 paf 470: String::Language saved_lang;
1.39 paf 471: public:
1.162 paf 472: Temp_lang(Request& arequest, String::Language alang) :
1.39 paf 473: frequest(arequest),
474: saved_lang(arequest.set_lang(alang)) {
475: }
476: ~Temp_lang() {
477: frequest.restore_lang(saved_lang);
1.117 paf 478: }
479: };
480:
481: /// Auto-object used for temporary changing Request::fconnection.
482: class Temp_connection {
483: Request& frequest;
1.162 paf 484: SQL_Connection* saved_connection;
1.117 paf 485: public:
1.162 paf 486: Temp_connection(Request& arequest, SQL_Connection* aconnection) :
1.117 paf 487: frequest(arequest),
488: saved_connection(arequest.set_connection(aconnection)) {
489: }
490: ~Temp_connection() {
491: frequest.restore_connection(saved_connection);
1.39 paf 492: }
1.91 parser 493: };
494:
495:
1.162 paf 496: // defines for externs
1.91 parser 497:
1.162 paf 498: #define CONTENT_DISPOSITION_NAME "content-disposition"
499: #define CONTENT_DISPOSITION_VALUE "attachment"
500: #define CONTENT_DISPOSITION_FILENAME_NAME "filename"
1.170 paf 501: #define EXCEPTION_HANDLED_PART_NAME "handled"
502:
1.162 paf 503:
504: // externs
505:
506: extern const String main_method_name;
507: extern const String auto_method_name;
508: extern const String body_name;
509: extern const String content_disposition_name;
510: extern const String content_disposition_value;
511: extern const String content_disposition_filename_name;
512:
513: extern const String exception_type_part_name;
514: extern const String exception_source_part_name;
515: extern const String exception_comment_part_name;
516: extern const String exception_handled_part_name;
1.91 parser 517:
1.162 paf 518: // defines for statics
1.91 parser 519:
1.162 paf 520: #define MAIN_CLASS_NAME "MAIN"
521: #define AUTO_FILE_NAME "auto.p"
1.1 paf 522:
523: #endif
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