Annotation of parser3/src/include/pa_request.h, revision 1.282
1.61 paf 1: /** @file
1.62 paf 2: Parser: request class decl.
3:
1.272 moko 4: Copyright (c) 2001-2026 Art. Lebedev Studio (https://www.artlebedev.com)
1.262 moko 5: Authors: Konstantin Morshnev <moko@design.ru>, Alexandr Petrosian <paf@design.ru>
1.1 paf 6: */
7:
8: #ifndef PA_REQUEST_H
9: #define PA_REQUEST_H
1.141 paf 10:
1.282 ! moko 11: #define IDENT_PA_REQUEST_H "$Id: pa_request.h,v 1.281 2026/10/01 12:46:17 moko Exp $"
1.1 paf 12:
1.168 paf 13: #include "pa_pool.h"
1.5 paf 14: #include "pa_hash.h"
1.278 moko 15: #include "pa_file.h"
1.7 paf 16: #include "pa_wcontext.h"
1.6 paf 17: #include "pa_value.h"
1.273 moko 18: #include "pa_vhash.h"
1.7 paf 19: #include "pa_stack.h"
1.162 paf 20: #include "pa_request_info.h"
21: #include "pa_request_charsets.h"
22: #include "pa_sapi.h"
1.44 paf 23:
1.257 moko 24: // externs
25:
26: extern const String main_method_name;
27: extern const String auto_method_name;
28:
29: // defines for statics
30:
31: #define MAIN_CLASS_NAME "MAIN"
32: #define AUTO_FILE_NAME "auto.p"
33:
1.128 paf 34: // consts
35:
1.162 paf 36: const size_t pseudo_file_no__process=1;
1.128 paf 37:
1.162 paf 38: // forwards
1.4 paf 39:
1.39 paf 40: class Temp_lang;
1.84 paf 41: class Methoded;
1.116 paf 42: class VMethodFrame;
1.162 paf 43: class VMail;
44: class VForm;
45: class VResponse;
46: class VCookie;
47: class VStateless_class;
1.215 moko 48: class VConsole;
1.273 moko 49: class VException;
1.1 paf 50:
1.244 moko 51: extern int pa_loop_limit;
1.266 moko 52: extern int pa_array_limit;
1.267 moko 53: extern int pa_execute_recursion_limit;
1.257 moko 54: extern int pa_httpd_timeout;
1.244 moko 55: extern size_t pa_file_size_limit;
1.229 moko 56:
1.282 ! moko 57: class Code_cache;
! 58:
1.61 paf 59: /// Main workhorse.
1.162 paf 60: class Request: public PA_Object {
1.107 paf 61: friend class Temp_lang;
1.117 paf 62: friend class Temp_connection;
1.214 moko 63: friend class Temp_request_self;
64: friend class Temp_value_element;
1.267 moko 65: friend class Temp_recursion;
1.148 paf 66: friend class Request_context_saver;
1.162 paf 67: friend class Exception_trace;
1.273 moko 68: friend class VException;
1.282 ! moko 69: friend class Code_cache_manager;
1.162 paf 70:
1.1 paf 71: public:
1.162 paf 72: class Trace {
73: const String* fname;
74: Operation::Origin forigin;
75: public:
76: Trace(): fname(0) {}
77: void clear() { fname=0; }
78:
79: Trace(const String* aname, const Operation::Origin aorigin):
80: fname(aname), forigin(aorigin) {}
81:
82: const String* name() const { return fname; }
83: const Operation::Origin origin() const { return forigin; }
84: };
85:
1.181 paf 86: enum Skip {
87: SKIP_NOTHING,
1.245 moko 88: SKIP_CONTINUE,
1.181 paf 89: SKIP_BREAK,
1.245 moko 90: SKIP_RETURN,
91: SKIP_INTERRUPTED
1.181 paf 92: };
93:
1.168 paf 94: private:
95: Pool fpool;
96: public:
97: Pool& pool() { return fpool; }
1.162 paf 98:
99: private:
100: union StackItem {
101: Value* fvalue;
102: ArrayOperation* fops;
103: VMethodFrame* fmethod_frame;
104: public:
105: Value& value() const { return *fvalue; }
106: const String& string() const {
1.167 paf 107: return fvalue->as_string();
1.162 paf 108: }
109: ArrayOperation& ops() const { return *fops; }
110: VMethodFrame& method_frame() const { return *fmethod_frame; }
111:
1.228 moko 112: StackItem(Value& avalue): fvalue(&avalue) {}
1.162 paf 113: StackItem(ArrayOperation& aops): fops(&aops) {}
114: StackItem(VMethodFrame& amethod_frame): fmethod_frame(&amethod_frame) {}
115: };
116:
117: class Exception_trace: public Stack<Trace> {
118: size_t fbottom;
119: public:
120: Exception_trace(): fbottom(0) {}
121:
122: size_t bottom_index() { return fbottom; }
1.165 paf 123: void set_bottom_index(size_t abottom) { fbottom=abottom; }
1.162 paf 124: element_type bottom_value() { return get(bottom_index()); }
1.274 moko 125: void set_range(size_t bottom, size_t top) { fbottom=bottom; fsize=top; }
1.162 paf 126:
127: void clear() {
1.264 moko 128: fsize=fbottom=0;
1.162 paf 129: }
130:
131: bool is_empty() {
1.264 moko 132: return fsize==fbottom;
1.162 paf 133: }
1.259 moko 134:
1.275 moko 135: Table &table(Request &r, const String* problem_source) {
136: return table(r, problem_source, bottom_index(), top_index());
137: }
138: Table &table(Request &r, const String* problem_source, size_t bottom, size_t top);
1.162 paf 139: };
140:
141: ///@{ core data
142:
143: /// classes
1.270 moko 144: OrderedHashString<VStateless_class*> fclasses;
1.162 paf 145:
146: /// already used files to avoid cyclic uses
1.193 misha 147: HashString<bool> used_files;
1.200 misha 148: HashString<bool> searched_along_class_path;
1.162 paf 149: /// list of all used files, Operation::file_no = index to it
1.163 paf 150: Array<String::Body> file_list;
1.162 paf 151:
1.229 moko 152: /// endless execute(execute(... preventing counter
1.267 moko 153: int anti_endless_execute_recursion;
1.276 moko 154: int execute_recursion_limit;
155: void recursion_limit_reached();
1.162 paf 156:
157: ///@}
158:
159: /// execution stack
160: Stack<StackItem> stack;
161:
1.274 moko 162: public:
1.162 paf 163: /// exception stack trace
164: Exception_trace exception_trace;
165:
1.213 moko 166: bool allow_class_replace;
167:
1.162 paf 168: //@{ request processing status
169: /// contexts
170: VMethodFrame* method_frame;
171: Value* rcontext;
172: WContext* wcontext;
173: /// current language
1.228 moko 174: String::Language flang;
1.162 paf 175: /// current connection
176: SQL_Connection* fconnection;
177: //@}
1.245 moko 178:
179: private:
180:
181: int fin_cycle;
1.181 paf 182: Skip fskip;
1.245 moko 183: VMethodFrame* freturn_method_frame;
1.162 paf 184:
185: public:
1.175 paf 186: uint register_file(String::Body file_spec);
1.162 paf 187:
1.273 moko 188: const char* get_exception_cstr(const Exception& e, VException& details);
1.162 paf 189:
190: /// @see Stack::wipe_unused
191: void wipe_unused_execution_stack() {
192: stack.wipe_unused();
193: }
1.112 paf 194:
195: #ifdef RESOURCES_DEBUG
196: /// measures
197: double sql_connect_time;
198: double sql_request_time;
199: #endif
1.61 paf 200:
1.162 paf 201: Request(SAPI_Info& asapi_info, Request_info& arequest_info,
1.208 moko 202: String::Language adefault_lang ///< all tainted data default untainting lang
1.50 paf 203: );
1.118 paf 204: ~Request();
1.1 paf 205:
1.61 paf 206: /// global classes
1.270 moko 207: OrderedHashString<VStateless_class*>& classes() { return fclasses; }
1.224 moko 208: VStateless_class* get_class(const String& name);
1.260 moko 209: VStateless_class& get_class_ref(const String& name);
1.224 moko 210: void put_class(VStateless_class *aclass){ classes().put(aclass->type(), aclass); }
1.265 moko 211: bool add_class(const char* atype, VStateless_class *aclass);
1.6 paf 212:
1.65 paf 213: /**
214: core request processing
215: BEWARE: may throw exception to you: catch it!
216: */
1.261 moko 217: void core(const char* config_filespec, bool header_only, const String& amain_method_name = main_method_name, const String* amain_class_name = NULL);
1.17 paf 218:
1.61 paf 219: /// executes ops
1.162 paf 220: void execute(ArrayOperation& ops); // execute.C
1.239 moko 221:
222: template<typename Frame> void call(Frame& frame){
223: VMethodFrame *saved_method_frame=method_frame;
224: Value* saved_rcontext=rcontext;
225: WContext *saved_wcontext=wcontext;
226:
227: rcontext=wcontext=method_frame=&frame;
228:
229: frame.call(*this);
230:
231: wcontext=saved_wcontext;
232: rcontext=saved_rcontext;
233: method_frame=saved_method_frame;
234: }
235:
236: template<typename Frame> void call_write(Frame& frame){
237: VMethodFrame *saved_method_frame=method_frame;
238: Value* saved_rcontext=rcontext;
239:
240: rcontext=method_frame=&frame;
241:
242: frame.call(*this);
243:
244: rcontext=saved_rcontext;
245: method_frame=saved_method_frame;
246: }
247:
1.225 moko 248: Value& construct(VStateless_class &class_value, const Method &method);
1.202 moko 249:
1.267 moko 250: /// execute ops with anti-recursion check
251: void recursion_checked_execute(ArrayOperation& ops) {
1.276 moko 252: if(++anti_endless_execute_recursion>=execute_recursion_limit)
253: recursion_limit_reached();
1.147 paf 254: execute(ops); // execute it
1.267 moko 255: anti_endless_execute_recursion--;
1.128 paf 256: }
1.40 paf 257:
1.277 moko 258: /// take the recovery reserve back if recursion limit is far enough
259: void recursion_limit_try_restore() {
260: if(execute_recursion_limit>pa_execute_recursion_limit && anti_endless_execute_recursion<pa_execute_recursion_limit/2)
261: execute_recursion_limit=pa_execute_recursion_limit;
262: }
263:
1.199 misha 264: ///
1.255 moko 265: void use_file_directly(const String& file_spec, bool fail_on_file_absence=true, bool with_auto_p=false);
1.228 moko 266:
1.255 moko 267: /// compiles the file in main class context by default
268: void use_file(const String& file_name, const String* use_filespec, bool with_auto_p=false);
1.241 moko 269:
270: /// for @USE only, calls ^use (which may be user-defined)
271: void use_file(const String& file_name, const String* use_filespec, Operation::Origin origin);
1.199 misha 272:
1.282 ! moko 273: /// compiles a @a source buffer, recording it into @a code if given, or replays the cached @a code
! 274: void use_buf(VStateless_class& aclass, const char* source, const String* main_alias, uint file_no, int line_no_offset=0, Code_cache* code=0);
1.28 paf 275:
1.129 paf 276: /// processes any code-junction there may be inside of @a value
1.227 moko 277: Value& process_getter(Junction& junction); // execute.C
1.231 moko 278: Value& process(Value& input_value); // execute.C
1.192 misha 279: void process_write(Value& input_value); // execute.C
1.228 moko 280:
1.129 paf 281: //@{ convinient helpers
282: const String& process_to_string(Value& input_value) {
1.231 moko 283: return process(input_value).as_string();
1.129 paf 284: }
1.126 paf 285: //@}
1.247 moko 286: const Operation::Origin get_method_origin(const Method* method); // execute.C
1.242 moko 287: const String* get_method_filespec(const Method* method); // execute.C
288: const String* get_used_filespec(uint file_no);
1.126 paf 289:
1.238 moko 290: /// appending string with it's languages
1.239 moko 291: inline void write(const String& astring) {
1.236 moko 292: wcontext->write(astring);
1.49 paf 293: }
1.238 moko 294:
295: /// in [] and {} appending string if get_string is not null, else appending value
1.240 moko 296: /// in () appending string if is_string, else appending value
1.239 moko 297: inline void write(Value& avalue) {
1.236 moko 298: wcontext->write_as_string(avalue);
1.131 paf 299: }
300:
1.238 moko 301: /// allways appending value
1.239 moko 302: inline void write_value(Value& avalue) {
1.226 moko 303: wcontext->write(avalue);
304: }
305:
1.64 paf 306: /// returns relative to @a path path to @a file
1.162 paf 307: const String& relative(const char* apath, const String& relative_name);
1.61 paf 308:
1.280 moko 309: /// '/'-normalized disk path of a file name; a uri of another scheme is returned as is if allowed, otherwise throws
1.279 moko 310: const String& full_disk_path(const String& relative_name, uint allowed=0);
1.281 moko 311: /// '/'-normalized full_disk_path of a real file on disk, which does not throw: 0 for a uri or a remote, invalid or tainted file:// one
1.279 moko 312: const String* real_disk_path(const String& name);
1.42 paf 313:
1.209 misha 314: /// returns the mime type of 'user_file_name'
315: const String& mime_type_of(const String* file_name);
316:
1.80 paf 317: /// returns the mime type of 'user_file_name_cstr'
1.162 paf 318: const String& mime_type_of(const char* user_file_name_cstr);
1.80 paf 319:
1.117 paf 320: /// returns current SQL connection if any
1.228 moko 321: SQL_Connection* connection(bool fail_on_error=true) {
1.162 paf 322: if(fail_on_error && !fconnection)
1.228 moko 323: throw Exception(PARSER_RUNTIME, 0, "outside of 'connect' operator");
324: return fconnection;
1.133 paf 325: }
326:
1.245 moko 327: Skip get_skip() { return fskip; }
1.181 paf 328: void set_skip(Skip askip) { fskip=askip; }
1.246 moko 329: void set_skip_return(VMethodFrame& amethod_frame) { fskip=SKIP_RETURN; freturn_method_frame=&amethod_frame; }
1.245 moko 330: inline bool check_skip_break() { bool result=fskip >= SKIP_BREAK; if(fskip <= SKIP_BREAK) fskip=SKIP_NOTHING; return result; }
331: inline void check_skip_return() { if(fskip==SKIP_RETURN && method_frame==freturn_method_frame) fskip=SKIP_NOTHING; }
1.181 paf 332:
1.196 misha 333: void set_in_cycle(int adelta) { fin_cycle+=adelta; }
334: bool get_in_cycle() { return fin_cycle>0; }
335:
1.17 paf 336: public:
1.22 paf 337:
1.61 paf 338: /// info from web server
1.162 paf 339: Request_info& request_info;
340:
341: /// info about ServerAPI
342: SAPI_Info& sapi_info;
343:
344: /// source, client, mail charsets
345: Request_charsets charsets;
1.53 paf 346:
1.154 paf 347: /// 'MAIN' class conglomerat & operators are methods of this class
1.162 paf 348: VStateless_class& main_class;
1.86 paf 349: /// $form:elements
1.162 paf 350: VForm& form;
1.140 paf 351: /// $mail
1.162 paf 352: VMail& mail;
1.86 paf 353: /// $response:elements
1.162 paf 354: VResponse& response;
1.86 paf 355: /// $cookie:elements
1.162 paf 356: VCookie& cookie;
1.183 misha 357: /// $console
358: VConsole& console;
1.70 paf 359:
1.148 paf 360: /// classes configured data
1.193 misha 361: HashString<void*> classes_conf;
1.85 paf 362:
1.148 paf 363: public: // status read methods
1.76 paf 364:
1.148 paf 365: VMethodFrame *get_method_frame() { return method_frame; }
1.162 paf 366: Value& get_self();
1.227 moko 367:
1.162 paf 368: #define GET_SELF(request, type) (static_cast<type &>(request.get_self()))
1.6 paf 369:
1.205 moko 370: /// public for ^reflection:copy[]
371: void put_element(Value& ncontext, const String& name, Value* value);
372:
1.251 moko 373: /// for @main[] and parser://method/call
374: const String* execute_method(VStateless_class& aclass, const String& method_name, Value* optional_param = 0);
1.173 paf 375:
1.251 moko 376: //{ for @conf[filespec] and @auto[filespec]
377: bool execute_method_if_exists(VStateless_class& aclass, const String& method_name, Value* optional_param);
1.263 moko 378: bool execute_auto_method_if_exists(VStateless_class& aclass, const String& method_name, Value* optional_param);
1.228 moko 379:
1.173 paf 380: //}
381:
1.162 paf 382: #ifdef XML
383: public: // charset helpers
1.67 paf 384:
1.162 paf 385: /// @see Charset::transcode
1.180 paf 386: xmlChar* transcode(const String& s);
1.162 paf 387: /// @see Charset::transcode
1.180 paf 388: xmlChar* transcode(const String::Body s);
1.162 paf 389: /// @see Charset::transcode
1.180 paf 390: const String& transcode(const xmlChar* s);
1.89 parser 391:
1.162 paf 392: #endif
1.136 paf 393:
394: private:
395:
396: /// already executed some @conf method
397: bool configure_admin_done;
398:
1.162 paf 399: void configure_admin(VStateless_class& conf_class);
1.177 paf 400:
401: void configure();
1.99 parser 402:
1.7 paf 403: private: // compile.C
404:
1.282 ! moko 405: ArrayClass& compile(VStateless_class* aclass, const char* source, const String* main_alias, uint file_no, int line_no_offset, Code_cache* code);
1.7 paf 406:
407: private: // execute.C
1.9 paf 408:
1.191 misha 409: Value& get_element(Value& ncontext, const String& name);
1.219 moko 410: #ifdef FEATURE_GET_ELEMENT4CALL
411: Value& get_element4call(Value& ncontext, const String& name);
412: #endif
1.22 paf 413:
1.58 paf 414: private: // defaults
415:
1.162 paf 416: const String::Language fdefault_lang;
1.80 paf 417:
418: private: // mime types
419:
420: /// $MAIN:MIME-TYPES
421: Table *mime_types;
1.22 paf 422:
1.117 paf 423: private: // connection manipulation
424:
1.162 paf 425: SQL_Connection* set_connection(SQL_Connection* aconnection) {
426: SQL_Connection* result=fconnection;
1.117 paf 427: fconnection=aconnection;
428: return result;
429: }
1.162 paf 430: void restore_connection(SQL_Connection* aconnection) {
1.117 paf 431: fconnection=aconnection;
432: }
433:
434: private:
435:
1.162 paf 436: void output_result(VFile* body_file, bool header_only, bool as_attachment);
1.148 paf 437: };
438:
1.273 moko 439: /// Hash-compatible exception; hash is built on demand.
440: class VException: public VHashReference {
441: Exception fexception;
442: String::Body ffile;
443: Value* fhandled;
1.275 moko 444: size_t ftrace_bottom, ftrace_top;
1.273 moko 445: public:
446: Operation::Origin origin;
447: const String* problem_source;
448:
449: VException(Request& r, const Exception& e);
450:
451: override HashStringValue& hash();
452: override Value* get_element(const String& name);
453: override const VJunction* put_element(const String& name, Value* value);
454:
455: Value* handled();
1.275 moko 456: Table& stack(Request& r);
457: void expire_trace() { ftrace_top=size_t(-1); }
1.273 moko 458: };
459:
1.148 paf 460: /// Auto-object used to save request context across ^try body
461: class Request_context_saver {
462: Request& fr;
463:
464: /// execution stack
1.162 paf 465: size_t stack;
1.277 moko 466: int anti_endless_execute_recursion;
1.148 paf 467: /// contexts
1.162 paf 468: VMethodFrame* method_frame;
469: Value* rcontext;
470: WContext* wcontext;
1.148 paf 471: /// current language
1.162 paf 472: String::Language flang;
1.148 paf 473: /// current connection
1.162 paf 474: SQL_Connection* fconnection;
1.126 paf 475:
1.148 paf 476: public:
1.228 moko 477: Request_context_saver(Request& ar) :
1.171 paf 478: fr(ar),
1.165 paf 479: stack(ar.stack.top_index()),
1.267 moko 480: anti_endless_execute_recursion(ar.anti_endless_execute_recursion),
1.148 paf 481: method_frame(ar.method_frame),
482: rcontext(ar.rcontext),
483: wcontext(ar.wcontext),
484: flang(ar.flang),
1.171 paf 485: fconnection(ar.fconnection) {}
1.153 paf 486: void restore() {
1.165 paf 487: fr.stack.set_top_index(stack);
1.267 moko 488: fr.anti_endless_execute_recursion=anti_endless_execute_recursion;
1.157 paf 489: fr.method_frame=method_frame, fr.rcontext=rcontext; fr.wcontext=wcontext;
1.148 paf 490: fr.flang=flang;
491: fr.fconnection=fconnection;
492: }
1.39 paf 493: };
494:
1.117 paf 495: /// Auto-object used for temporary changing Request::fconnection.
496: class Temp_connection {
497: Request& frequest;
1.162 paf 498: SQL_Connection* saved_connection;
1.117 paf 499: public:
1.228 moko 500: Temp_connection(Request& arequest, SQL_Connection* aconnection) :
1.117 paf 501: frequest(arequest),
502: saved_connection(arequest.set_connection(aconnection)) {
503: }
1.228 moko 504: ~Temp_connection() {
1.117 paf 505: frequest.restore_connection(saved_connection);
1.39 paf 506: }
1.91 parser 507: };
508:
1.196 misha 509: /// Auto-object used for break out of cycle check
510: class InCycle {
511: Request& frequest;
512: public:
513: InCycle(Request& arequest) : frequest(arequest) {
514: frequest.set_in_cycle(1);
515: }
1.228 moko 516: ~InCycle() {
1.196 misha 517: frequest.set_in_cycle(-1);
518: }
519: };
1.91 parser 520:
1.245 moko 521: /// Auto-object used for break out of cycle check
522: class TempSkip4Delimiter {
523: Request& frequest;
524: Request::Skip fskip;
525: public:
526: TempSkip4Delimiter(Request& arequest) : frequest(arequest), fskip(arequest.get_skip()) {
527: frequest.set_skip(Request::SKIP_NOTHING);
528: }
529: // returns true if break required, should be called
530: bool check_break() {
531: if(frequest.get_skip())
532: fskip=frequest.get_skip();
533: frequest.set_skip(fskip <= Request::SKIP_BREAK ? Request::SKIP_NOTHING : fskip);
534: return fskip >= Request::SKIP_BREAK;
535: }
536: };
537:
1.213 moko 538: /// Auto-object used for temporary changing Request::allow_class_replace.
539: class Temp_class_replace {
540: Request& frequest;
541: public:
542: Temp_class_replace(Request& arequest, bool avalue) : frequest(arequest){
543: frequest.allow_class_replace=avalue;
544: }
545: ~Temp_class_replace() {
546: frequest.allow_class_replace=false;
547: }
548: };
549:
1.214 moko 550: /// Auto-object used for temporarily substituting/removing elements
551: class Temp_value_element {
552: Request& frequest;
553: Value& fwhere;
554: const String& fname;
1.216 moko 555: Value* saved;
1.214 moko 556: public:
1.216 moko 557: Temp_value_element(Request& arequest, Value& awhere, const String& aname, Value* awhat);
558: ~Temp_value_element();
1.214 moko 559: };
560:
1.267 moko 561: /// Auto-object that temporarily increases recursion
562: class Temp_recursion {
563: Request& frequest;
564: public:
565: Temp_recursion(Request& arequest) : frequest(arequest){
566: frequest.anti_endless_execute_recursion++;
567: }
568: ~Temp_recursion(){
569: frequest.anti_endless_execute_recursion--;
570: }
571: };
572:
1.1 paf 573: #endif
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