Annotation of parser3/src/include/pa_request.h, revision 1.285
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:
1.285 ! moko 11: #define IDENT_PA_REQUEST_H "$Id: pa_request.h,v 1.284 2026/10/10 12:58:07 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:
1.84 paf 40: class Methoded;
1.116 paf 41: class VMethodFrame;
1.162 paf 42: class VMail;
43: class VForm;
44: class VResponse;
45: class VCookie;
46: class VStateless_class;
1.215 moko 47: class VConsole;
1.273 moko 48: class VException;
1.1 paf 49:
1.244 moko 50: extern int pa_loop_limit;
1.266 moko 51: extern int pa_array_limit;
1.267 moko 52: extern int pa_execute_recursion_limit;
1.257 moko 53: extern int pa_httpd_timeout;
1.244 moko 54: extern size_t pa_file_size_limit;
1.229 moko 55:
1.282 moko 56: class Code_cache;
57:
1.61 paf 58: /// Main workhorse.
1.162 paf 59: class Request: public PA_Object {
1.117 paf 60: friend class Temp_connection;
1.214 moko 61: friend class Temp_request_self;
62: friend class Temp_value_element;
1.267 moko 63: friend class Temp_recursion;
1.148 paf 64: friend class Request_context_saver;
1.162 paf 65: friend class Exception_trace;
1.273 moko 66: friend class VException;
1.282 moko 67: friend class Code_cache_manager;
1.162 paf 68:
1.1 paf 69: public:
1.162 paf 70: class Trace {
71: const String* fname;
72: Operation::Origin forigin;
73: public:
74: Trace(): fname(0) {}
75: void clear() { fname=0; }
76:
77: Trace(const String* aname, const Operation::Origin aorigin):
78: fname(aname), forigin(aorigin) {}
79:
80: const String* name() const { return fname; }
81: const Operation::Origin origin() const { return forigin; }
82: };
83:
1.181 paf 84: enum Skip {
85: SKIP_NOTHING,
1.245 moko 86: SKIP_CONTINUE,
1.181 paf 87: SKIP_BREAK,
1.245 moko 88: SKIP_RETURN,
89: SKIP_INTERRUPTED
1.181 paf 90: };
91:
1.168 paf 92: private:
93: Pool fpool;
94: public:
95: Pool& pool() { return fpool; }
1.162 paf 96:
97: private:
98: union StackItem {
99: Value* fvalue;
100: ArrayOperation* fops;
101: VMethodFrame* fmethod_frame;
102: public:
103: Value& value() const { return *fvalue; }
104: const String& string() const {
1.167 paf 105: return fvalue->as_string();
1.162 paf 106: }
107: ArrayOperation& ops() const { return *fops; }
108: VMethodFrame& method_frame() const { return *fmethod_frame; }
109:
1.228 moko 110: StackItem(Value& avalue): fvalue(&avalue) {}
1.162 paf 111: StackItem(ArrayOperation& aops): fops(&aops) {}
112: StackItem(VMethodFrame& amethod_frame): fmethod_frame(&amethod_frame) {}
113: };
114:
115: class Exception_trace: public Stack<Trace> {
116: size_t fbottom;
117: public:
118: Exception_trace(): fbottom(0) {}
119:
120: size_t bottom_index() { return fbottom; }
1.165 paf 121: void set_bottom_index(size_t abottom) { fbottom=abottom; }
1.162 paf 122: element_type bottom_value() { return get(bottom_index()); }
1.274 moko 123: void set_range(size_t bottom, size_t top) { fbottom=bottom; fsize=top; }
1.162 paf 124:
125: void clear() {
1.264 moko 126: fsize=fbottom=0;
1.162 paf 127: }
128:
129: bool is_empty() {
1.264 moko 130: return fsize==fbottom;
1.162 paf 131: }
1.259 moko 132:
1.275 moko 133: Table &table(Request &r, const String* problem_source) {
134: return table(r, problem_source, bottom_index(), top_index());
135: }
136: Table &table(Request &r, const String* problem_source, size_t bottom, size_t top);
1.162 paf 137: };
138:
139: ///@{ core data
140:
141: /// classes
1.270 moko 142: OrderedHashString<VStateless_class*> fclasses;
1.162 paf 143:
144: /// already used files to avoid cyclic uses
1.193 misha 145: HashString<bool> used_files;
1.200 misha 146: HashString<bool> searched_along_class_path;
1.162 paf 147: /// list of all used files, Operation::file_no = index to it
1.163 paf 148: Array<String::Body> file_list;
1.162 paf 149:
1.229 moko 150: /// endless execute(execute(... preventing counter
1.267 moko 151: int anti_endless_execute_recursion;
1.276 moko 152: int execute_recursion_limit;
153: void recursion_limit_reached();
1.162 paf 154:
155: ///@}
156:
157: /// execution stack
158: Stack<StackItem> stack;
159:
1.274 moko 160: public:
1.162 paf 161: /// exception stack trace
162: Exception_trace exception_trace;
163:
1.213 moko 164: bool allow_class_replace;
165:
1.162 paf 166: //@{ request processing status
167: /// contexts
168: VMethodFrame* method_frame;
169: Value* rcontext;
170: WContext* wcontext;
1.285 ! moko 171: /// response untainting lang
1.228 moko 172: String::Language flang;
1.162 paf 173: /// current connection
174: SQL_Connection* fconnection;
175: //@}
1.245 moko 176:
177: private:
178:
179: int fin_cycle;
1.181 paf 180: Skip fskip;
1.245 moko 181: VMethodFrame* freturn_method_frame;
1.162 paf 182:
183: public:
1.175 paf 184: uint register_file(String::Body file_spec);
1.162 paf 185:
1.273 moko 186: const char* get_exception_cstr(const Exception& e, VException& details);
1.162 paf 187:
188: /// @see Stack::wipe_unused
189: void wipe_unused_execution_stack() {
190: stack.wipe_unused();
191: }
1.112 paf 192:
193: #ifdef RESOURCES_DEBUG
194: /// measures
195: double sql_connect_time;
196: double sql_request_time;
197: #endif
1.61 paf 198:
1.162 paf 199: Request(SAPI_Info& asapi_info, Request_info& arequest_info,
1.208 moko 200: String::Language adefault_lang ///< all tainted data default untainting lang
1.50 paf 201: );
1.118 paf 202: ~Request();
1.1 paf 203:
1.61 paf 204: /// global classes
1.270 moko 205: OrderedHashString<VStateless_class*>& classes() { return fclasses; }
1.224 moko 206: VStateless_class* get_class(const String& name);
1.260 moko 207: VStateless_class& get_class_ref(const String& name);
1.224 moko 208: void put_class(VStateless_class *aclass){ classes().put(aclass->type(), aclass); }
1.265 moko 209: bool add_class(const char* atype, VStateless_class *aclass);
1.6 paf 210:
1.65 paf 211: /**
212: core request processing
213: BEWARE: may throw exception to you: catch it!
214: */
1.283 moko 215: void core(const char* config_filespec, const String& amain_method_name = main_method_name, const String* amain_class_name = NULL);
1.17 paf 216:
1.284 moko 217: /// ^response:send[part]: the headers go with the first part, the result of @main or exception is not sent then
218: void send(Value& part);
219:
1.61 paf 220: /// executes ops
1.162 paf 221: void execute(ArrayOperation& ops); // execute.C
1.239 moko 222:
223: template<typename Frame> void call(Frame& frame){
224: VMethodFrame *saved_method_frame=method_frame;
225: Value* saved_rcontext=rcontext;
226: WContext *saved_wcontext=wcontext;
227:
228: rcontext=wcontext=method_frame=&frame;
229:
230: frame.call(*this);
231:
232: wcontext=saved_wcontext;
233: rcontext=saved_rcontext;
234: method_frame=saved_method_frame;
235: }
236:
237: template<typename Frame> void call_write(Frame& frame){
238: VMethodFrame *saved_method_frame=method_frame;
239: Value* saved_rcontext=rcontext;
240:
241: rcontext=method_frame=&frame;
242:
243: frame.call(*this);
244:
245: rcontext=saved_rcontext;
246: method_frame=saved_method_frame;
247: }
248:
1.225 moko 249: Value& construct(VStateless_class &class_value, const Method &method);
1.202 moko 250:
1.267 moko 251: /// execute ops with anti-recursion check
252: void recursion_checked_execute(ArrayOperation& ops) {
1.276 moko 253: if(++anti_endless_execute_recursion>=execute_recursion_limit)
254: recursion_limit_reached();
1.147 paf 255: execute(ops); // execute it
1.267 moko 256: anti_endless_execute_recursion--;
1.128 paf 257: }
1.40 paf 258:
1.277 moko 259: /// take the recovery reserve back if recursion limit is far enough
260: void recursion_limit_try_restore() {
261: if(execute_recursion_limit>pa_execute_recursion_limit && anti_endless_execute_recursion<pa_execute_recursion_limit/2)
262: execute_recursion_limit=pa_execute_recursion_limit;
263: }
264:
1.199 misha 265: ///
1.255 moko 266: void use_file_directly(const String& file_spec, bool fail_on_file_absence=true, bool with_auto_p=false);
1.228 moko 267:
1.255 moko 268: /// compiles the file in main class context by default
269: void use_file(const String& file_name, const String* use_filespec, bool with_auto_p=false);
1.241 moko 270:
271: /// for @USE only, calls ^use (which may be user-defined)
272: void use_file(const String& file_name, const String* use_filespec, Operation::Origin origin);
1.199 misha 273:
1.282 moko 274: /// compiles a @a source buffer, recording it into @a code if given, or replays the cached @a code
275: 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 276:
1.129 paf 277: /// processes any code-junction there may be inside of @a value
1.227 moko 278: Value& process_getter(Junction& junction); // execute.C
1.231 moko 279: Value& process(Value& input_value); // execute.C
1.192 misha 280: void process_write(Value& input_value); // execute.C
1.228 moko 281:
1.129 paf 282: //@{ convinient helpers
283: const String& process_to_string(Value& input_value) {
1.231 moko 284: return process(input_value).as_string();
1.129 paf 285: }
1.126 paf 286: //@}
1.247 moko 287: const Operation::Origin get_method_origin(const Method* method); // execute.C
1.242 moko 288: const String* get_method_filespec(const Method* method); // execute.C
289: const String* get_used_filespec(uint file_no);
1.126 paf 290:
1.238 moko 291: /// appending string with it's languages
1.239 moko 292: inline void write(const String& astring) {
1.236 moko 293: wcontext->write(astring);
1.49 paf 294: }
1.238 moko 295:
296: /// in [] and {} appending string if get_string is not null, else appending value
1.240 moko 297: /// in () appending string if is_string, else appending value
1.239 moko 298: inline void write(Value& avalue) {
1.236 moko 299: wcontext->write_as_string(avalue);
1.131 paf 300: }
301:
1.238 moko 302: /// allways appending value
1.239 moko 303: inline void write_value(Value& avalue) {
1.226 moko 304: wcontext->write(avalue);
305: }
306:
1.64 paf 307: /// returns relative to @a path path to @a file
1.162 paf 308: const String& relative(const char* apath, const String& relative_name);
1.61 paf 309:
1.280 moko 310: /// '/'-normalized disk path of a file name; a uri of another scheme is returned as is if allowed, otherwise throws
1.279 moko 311: const String& full_disk_path(const String& relative_name, uint allowed=0);
1.281 moko 312: /// '/'-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 313: const String* real_disk_path(const String& name);
1.42 paf 314:
1.209 misha 315: /// returns the mime type of 'user_file_name'
316: const String& mime_type_of(const String* file_name);
317:
1.80 paf 318: /// returns the mime type of 'user_file_name_cstr'
1.162 paf 319: const String& mime_type_of(const char* user_file_name_cstr);
1.80 paf 320:
1.117 paf 321: /// returns current SQL connection if any
1.228 moko 322: SQL_Connection* connection(bool fail_on_error=true) {
1.162 paf 323: if(fail_on_error && !fconnection)
1.228 moko 324: throw Exception(PARSER_RUNTIME, 0, "outside of 'connect' operator");
325: return fconnection;
1.133 paf 326: }
327:
1.245 moko 328: Skip get_skip() { return fskip; }
1.181 paf 329: void set_skip(Skip askip) { fskip=askip; }
1.246 moko 330: void set_skip_return(VMethodFrame& amethod_frame) { fskip=SKIP_RETURN; freturn_method_frame=&amethod_frame; }
1.245 moko 331: inline bool check_skip_break() { bool result=fskip >= SKIP_BREAK; if(fskip <= SKIP_BREAK) fskip=SKIP_NOTHING; return result; }
332: inline void check_skip_return() { if(fskip==SKIP_RETURN && method_frame==freturn_method_frame) fskip=SKIP_NOTHING; }
1.181 paf 333:
1.196 misha 334: void set_in_cycle(int adelta) { fin_cycle+=adelta; }
335: bool get_in_cycle() { return fin_cycle>0; }
336:
1.17 paf 337: public:
1.22 paf 338:
1.61 paf 339: /// info from web server
1.162 paf 340: Request_info& request_info;
341:
342: /// info about ServerAPI
343: SAPI_Info& sapi_info;
344:
345: /// source, client, mail charsets
346: Request_charsets charsets;
1.53 paf 347:
1.154 paf 348: /// 'MAIN' class conglomerat & operators are methods of this class
1.162 paf 349: VStateless_class& main_class;
1.86 paf 350: /// $form:elements
1.162 paf 351: VForm& form;
1.140 paf 352: /// $mail
1.162 paf 353: VMail& mail;
1.86 paf 354: /// $response:elements
1.162 paf 355: VResponse& response;
1.86 paf 356: /// $cookie:elements
1.162 paf 357: VCookie& cookie;
1.183 misha 358: /// $console
359: VConsole& console;
1.70 paf 360:
1.148 paf 361: /// classes configured data
1.193 misha 362: HashString<void*> classes_conf;
1.85 paf 363:
1.148 paf 364: public: // status read methods
1.76 paf 365:
1.148 paf 366: VMethodFrame *get_method_frame() { return method_frame; }
1.162 paf 367: Value& get_self();
1.227 moko 368:
1.162 paf 369: #define GET_SELF(request, type) (static_cast<type &>(request.get_self()))
1.6 paf 370:
1.205 moko 371: /// public for ^reflection:copy[]
372: void put_element(Value& ncontext, const String& name, Value* value);
373:
1.251 moko 374: /// for @main[] and parser://method/call
375: const String* execute_method(VStateless_class& aclass, const String& method_name, Value* optional_param = 0);
1.173 paf 376:
1.251 moko 377: //{ for @conf[filespec] and @auto[filespec]
378: bool execute_method_if_exists(VStateless_class& aclass, const String& method_name, Value* optional_param);
1.263 moko 379: bool execute_auto_method_if_exists(VStateless_class& aclass, const String& method_name, Value* optional_param);
1.228 moko 380:
1.173 paf 381: //}
382:
1.162 paf 383: #ifdef XML
384: public: // charset helpers
1.67 paf 385:
1.162 paf 386: /// @see Charset::transcode
1.180 paf 387: xmlChar* transcode(const String& s);
1.162 paf 388: /// @see Charset::transcode
1.180 paf 389: xmlChar* transcode(const String::Body s);
1.162 paf 390: /// @see Charset::transcode
1.180 paf 391: const String& transcode(const xmlChar* s);
1.89 parser 392:
1.162 paf 393: #endif
1.136 paf 394:
395: private:
396:
397: /// already executed some @conf method
398: bool configure_admin_done;
399:
1.162 paf 400: void configure_admin(VStateless_class& conf_class);
1.177 paf 401:
402: void configure();
1.99 parser 403:
1.7 paf 404: private: // compile.C
405:
1.282 moko 406: 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 407:
408: private: // execute.C
1.9 paf 409:
1.191 misha 410: Value& get_element(Value& ncontext, const String& name);
1.219 moko 411: #ifdef FEATURE_GET_ELEMENT4CALL
412: Value& get_element4call(Value& ncontext, const String& name);
413: #endif
1.22 paf 414:
1.80 paf 415: private: // mime types
416:
417: /// $MAIN:MIME-TYPES
418: Table *mime_types;
1.22 paf 419:
1.284 moko 420: private: // true if ^response:send[] was used
421:
422: bool fheaders_sent;
423:
1.117 paf 424: private: // connection manipulation
425:
1.162 paf 426: SQL_Connection* set_connection(SQL_Connection* aconnection) {
427: SQL_Connection* result=fconnection;
1.117 paf 428: fconnection=aconnection;
429: return result;
430: }
1.162 paf 431: void restore_connection(SQL_Connection* aconnection) {
1.117 paf 432: fconnection=aconnection;
433: }
434:
435: private:
436:
1.162 paf 437: void output_result(VFile* body_file, bool header_only, bool as_attachment);
1.148 paf 438: };
439:
1.273 moko 440: /// Hash-compatible exception; hash is built on demand.
441: class VException: public VHashReference {
442: Exception fexception;
443: String::Body ffile;
444: Value* fhandled;
1.275 moko 445: size_t ftrace_bottom, ftrace_top;
1.273 moko 446: public:
447: Operation::Origin origin;
448: const String* problem_source;
449:
450: VException(Request& r, const Exception& e);
451:
452: override HashStringValue& hash();
453: override Value* get_element(const String& name);
454: override const VJunction* put_element(const String& name, Value* value);
455:
456: Value* handled();
1.275 moko 457: Table& stack(Request& r);
458: void expire_trace() { ftrace_top=size_t(-1); }
1.273 moko 459: };
460:
1.148 paf 461: /// Auto-object used to save request context across ^try body
462: class Request_context_saver {
463: Request& fr;
464:
465: /// execution stack
1.162 paf 466: size_t stack;
1.277 moko 467: int anti_endless_execute_recursion;
1.148 paf 468: /// contexts
1.162 paf 469: VMethodFrame* method_frame;
470: Value* rcontext;
471: WContext* wcontext;
1.148 paf 472: /// current connection
1.162 paf 473: SQL_Connection* fconnection;
1.126 paf 474:
1.148 paf 475: public:
1.228 moko 476: Request_context_saver(Request& ar) :
1.171 paf 477: fr(ar),
1.165 paf 478: stack(ar.stack.top_index()),
1.267 moko 479: anti_endless_execute_recursion(ar.anti_endless_execute_recursion),
1.148 paf 480: method_frame(ar.method_frame),
481: rcontext(ar.rcontext),
482: wcontext(ar.wcontext),
1.171 paf 483: fconnection(ar.fconnection) {}
1.153 paf 484: void restore() {
1.165 paf 485: fr.stack.set_top_index(stack);
1.267 moko 486: fr.anti_endless_execute_recursion=anti_endless_execute_recursion;
1.157 paf 487: fr.method_frame=method_frame, fr.rcontext=rcontext; fr.wcontext=wcontext;
1.148 paf 488: fr.fconnection=fconnection;
489: }
1.39 paf 490: };
491:
1.117 paf 492: /// Auto-object used for temporary changing Request::fconnection.
493: class Temp_connection {
494: Request& frequest;
1.162 paf 495: SQL_Connection* saved_connection;
1.117 paf 496: public:
1.228 moko 497: Temp_connection(Request& arequest, SQL_Connection* aconnection) :
1.117 paf 498: frequest(arequest),
499: saved_connection(arequest.set_connection(aconnection)) {
500: }
1.228 moko 501: ~Temp_connection() {
1.117 paf 502: frequest.restore_connection(saved_connection);
1.39 paf 503: }
1.91 parser 504: };
505:
1.196 misha 506: /// Auto-object used for break out of cycle check
507: class InCycle {
508: Request& frequest;
509: public:
510: InCycle(Request& arequest) : frequest(arequest) {
511: frequest.set_in_cycle(1);
512: }
1.228 moko 513: ~InCycle() {
1.196 misha 514: frequest.set_in_cycle(-1);
515: }
516: };
1.91 parser 517:
1.245 moko 518: /// Auto-object used for break out of cycle check
519: class TempSkip4Delimiter {
520: Request& frequest;
521: Request::Skip fskip;
522: public:
523: TempSkip4Delimiter(Request& arequest) : frequest(arequest), fskip(arequest.get_skip()) {
524: frequest.set_skip(Request::SKIP_NOTHING);
525: }
526: // returns true if break required, should be called
527: bool check_break() {
528: if(frequest.get_skip())
529: fskip=frequest.get_skip();
530: frequest.set_skip(fskip <= Request::SKIP_BREAK ? Request::SKIP_NOTHING : fskip);
531: return fskip >= Request::SKIP_BREAK;
532: }
533: };
534:
1.213 moko 535: /// Auto-object used for temporary changing Request::allow_class_replace.
536: class Temp_class_replace {
537: Request& frequest;
538: public:
539: Temp_class_replace(Request& arequest, bool avalue) : frequest(arequest){
540: frequest.allow_class_replace=avalue;
541: }
542: ~Temp_class_replace() {
543: frequest.allow_class_replace=false;
544: }
545: };
546:
1.214 moko 547: /// Auto-object used for temporarily substituting/removing elements
548: class Temp_value_element {
549: Request& frequest;
550: Value& fwhere;
551: const String& fname;
1.216 moko 552: Value* saved;
1.214 moko 553: public:
1.216 moko 554: Temp_value_element(Request& arequest, Value& awhere, const String& aname, Value* awhat);
555: ~Temp_value_element();
1.214 moko 556: };
557:
1.267 moko 558: /// Auto-object that temporarily increases recursion
559: class Temp_recursion {
560: Request& frequest;
561: public:
562: Temp_recursion(Request& arequest) : frequest(arequest){
563: frequest.anti_endless_execute_recursion++;
564: }
565: ~Temp_recursion(){
566: frequest.anti_endless_execute_recursion--;
567: }
568: };
569:
1.1 paf 570: #endif
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